diff --git a/berry_bush.png b/berry_bush.png new file mode 100644 index 0000000..f71cc1c Binary files /dev/null and b/berry_bush.png differ diff --git a/build.c b/build.c index 01dd40c..a7ca6a8 100644 --- a/build.c +++ b/build.c @@ -2,7 +2,10 @@ /// // Build config stuff -#define RUN_TESTS 1 +#define RUN_TESTS 0 + +// This is only for people developing oogabooga! +#define OOGABOOGA_DEV 1 // When we need very debug // #define CONFIGURATION VERY_DEBUG diff --git a/build_clang.bat b/build_clang.bat index f6f9774..27210c4 100644 --- a/build_clang.bat +++ b/build_clang.bat @@ -4,6 +4,6 @@ mkdir build pushd build -clang -g -o cgame.exe ../build.c -O0 -std=c11 -Wextra -Wno-incompatible-library-redeclaration -Wno-sign-compare -Wno-unused-parameter -Wno-builtin-requires-header -lgdi32 -luser32 -lopengl32 -lwinmm +clang -g -o cgame.exe ../build.c -O0 -std=c11 -Wextra -Wno-incompatible-library-redeclaration -Wno-sign-compare -Wno-unused-parameter -Wno-builtin-requires-header -lgdi32 -luser32 -lwinmm -ld3d11 -ldxguid -ld3dcompiler popd \ No newline at end of file diff --git a/build_release_clang.bat b/build_release_clang.bat index c457534..7f29d40 100644 --- a/build_release_clang.bat +++ b/build_release_clang.bat @@ -7,7 +7,7 @@ pushd build mkdir release pushd release -clang -o cgame.exe ../../build.c -Ofast -std=c11 -Wextra -Wno-incompatible-library-redeclaration -Wno-sign-compare -Wno-unused-parameter -Wno-builtin-requires-header -lgdi32 -luser32 -lopengl32 -lwinmm +clang -o cgame.exe ../../build.c -Ofast -std=c11 -Wextra -Wno-incompatible-library-redeclaration -Wno-sign-compare -Wno-unused-parameter -Wno-builtin-requires-header -lgdi32 -luser32 -lwinmm -ld3d11 -ldxguid -ld3dcompiler popd popd \ No newline at end of file diff --git a/entry.c b/entry.c index 59e96a8..74c125a 100644 --- a/entry.c +++ b/entry.c @@ -1,5 +1,6 @@ + int start(int argc, char **argv) { window.title = fixed_string("My epic game"); @@ -8,18 +9,23 @@ int start(int argc, char **argv) { window.x = 200; window.y = 200; + Gfx_Image *bush_image = load_image_from_disk(fixed_string("berry_bush.png")); + assert(bush_image, "Failed loading berry_bush.png"); + Gfx_Image *hammer_image = load_image_from_disk(fixed_string("hammer.png")); + assert(hammer_image, "Failed loading hammer.png"); + seed_for_random = os_get_current_cycle_count(); - const float64 fps_limit = 420; + const float64 fps_limit = 69000; const float64 min_frametime = 1.0 / fps_limit; + Matrix4 camera_view = m4_scalar(1.0); + float64 last_time = os_get_current_time_in_seconds(); while (!window.should_close) { reset_temporary_storage(); context.allocator = temp; - os_update(); - float64 now = os_get_current_time_in_seconds(); float64 delta = now - last_time; if (delta < min_frametime) { @@ -28,34 +34,66 @@ int start(int argc, char **argv) { delta = now - last_time; } last_time = now; + os_update(); if (is_key_just_released(KEY_ESCAPE)) { window.should_close = true; } - if (is_key_just_released('E')) { - print("Mouse pos: %f, %f\n", input_frame.mouse_x, input_frame.mouse_y); - print("FPS: %.2f\n", 1.0 / delta); + if (is_key_just_pressed(KEY_ARROW_LEFT)) { + window.width += 10; + window.x -= 10; + } + if (is_key_just_pressed(KEY_ARROW_RIGHT)) { + window.width += 10; } - for (u64 i = 0; i < input_frame.number_of_events; i++) { - Input_Event e = input_frame.events[i]; - - switch (e.kind) { - case INPUT_EVENT_KEY: print("Key event key code %d\n", e.key_code); break; - case INPUT_EVENT_SCROLL: print("Scroll event, x: %.3f, y: %.3f\n", e.xscroll, e.yscroll); break; - case INPUT_EVENT_TEXT: print("Text event, utf32: %d, ascii: %c\n", e.utf32, e.ascii); break; - } + if (is_key_just_released('Q')) { + push_allocator(get_heap_allocator()); + delete_image(bush_image); + bush_image = load_image_from_disk(fixed_string("berry_bush.png")); + assert(bush_image, "Failed loading berry_bush.png"); + pop_allocator(); } + const float32 cam_move_speed = 4.0; + Vector2 cam_move_axis = v2(0, 0); + if (is_key_down('A')) { + cam_move_axis.x -= 1.0; + } + if (is_key_down('D')) { + cam_move_axis.x += 1.0; + } + if (is_key_down('S')) { + cam_move_axis.y -= 1.0; + } + if (is_key_down('W')) { + cam_move_axis.y += 1.0; + } - draw_rect_rotated(v2(-.25f, -.25f), v2(.5f, .5f), COLOR_RED, v2(.25, .25), (f32)now); + Vector2 cam_move = v2_mulf(cam_move_axis, delta * cam_move_speed); - Vector2 hover_position = v2_rotate_point_around_pivot(v2(-.5, -.5), v2(0, 0), -(f32)now); + camera_view = m4_translate(camera_view, v3(v2_expand(cam_move), 0)); + + draw_frame.view = camera_view; + + Matrix4 hammer_xform = m4_scalar(1.0); + hammer_xform = m4_rotate_z(hammer_xform, (f32)now); + hammer_xform = m4_translate(hammer_xform, v3(-.25f, -.25f, 0)); + draw_image_xform(hammer_image, hammer_xform, v2(.5f, .5f), COLOR_RED); + + Vector2 hover_position = v2_rotate_point_around_pivot(v2(-.5, -.5), v2(0, 0), (f32)now); Vector2 local_pivot = v2(.125f, .125f); - draw_rect(v2_sub(hover_position, local_pivot), v2(.25f, .25f), COLOR_GREEN); + draw_rect(v2_sub(hover_position, local_pivot), v2(.25f, .25f), v4((sin(now)+1.0)/2.0, 1.0, 0.0, 1.0)); + + draw_image(bush_image, v2(0.65, 0.65), v2(0.2*sin(now), 0.2*sin(now)), COLOR_WHITE); gfx_update(); + + if (is_key_just_released('E')) { + log("FPS: %.2f", 1.0 / delta); + log("ms: %.2f", delta*1000.0); + } } return 0; diff --git a/hammer.png b/hammer.png new file mode 100644 index 0000000..9260373 Binary files /dev/null and b/hammer.png differ diff --git a/oogabooga/base.c b/oogabooga/base.c index 1249e62..99191ee 100644 --- a/oogabooga/base.c +++ b/oogabooga/base.c @@ -25,12 +25,15 @@ typedef u8 bool; #define forward_global extern -#define ifnt(x) if (!(x)) +// Haters gonna hate +#define If if ( +#define then ) +// If cond then {} #ifdef _MSC_VER inline void os_break() { __debugbreak(); - int *a = 0; + volatile int *a = 0; *a = 5; } #else @@ -41,7 +44,7 @@ typedef u8 bool; void printf(const char* fmt, ...); #define STR_HELPER(x) #x #define STR(x) STR_HELPER(x) -#define assert_line(line, cond, ...) if (!(cond)) { printf("Assertion failed in file " __FILE__ " on line " STR(line) "\nFailed Condition: " #cond ". Message: " __VA_ARGS__); os_break(); } +#define assert_line(line, cond, ...) if(!(cond)) { printf("Assertion failed in file " __FILE__ " on line " STR(line) "\nFailed Condition: " #cond ". Message: " __VA_ARGS__); os_break(); } #define assert(cond, ...) assert_line(__LINE__, cond, __VA_ARGS__); #if CONFIGURATION == RELEASE @@ -124,6 +127,15 @@ typedef enum Allocator_Message { } Allocator_Message; typedef void*(*Allocator_Proc)(u64, void*, Allocator_Message); +typedef enum Log_Level { + LOG_ERROR, + LOG_INFO, + LOG_WARNING, + LOG_VERBOSE +} Log_Level; + + + typedef struct Allocator { Allocator_Proc proc; void *data; @@ -131,6 +143,7 @@ typedef struct Allocator { typedef struct Context { Allocator allocator; + void *logger; // void(*Logger_Proc)(Log_Level level, string fmt, ...) CONTEXT_EXTRA extra; } Context; @@ -141,12 +154,9 @@ thread_local Context context; thread_local Context context_stack[CONTEXT_STACK_MAX]; thread_local u64 num_contexts = 0; - void* alloc(u64 size) { return context.allocator.proc(size, NULL, ALLOCATOR_ALLOCATE); } void dealloc(void *p) { context.allocator.proc(0, p, ALLOCATOR_DEALLOCATE); } - - void push_context(Context c) { assert(num_contexts < CONTEXT_STACK_MAX, "Context stack overflow"); diff --git a/oogabooga/d3d11_image_shader_bytecode.c b/oogabooga/d3d11_image_shader_bytecode.c new file mode 100644 index 0000000..28407e2 --- /dev/null +++ b/oogabooga/d3d11_image_shader_bytecode.c @@ -0,0 +1,558 @@ +/* +<<<<<< Bytecode compiled from HLSL code below: >>>>>> + +struct VS_INPUT +{ + float2 uv : TEXCOORD; + float4 color : COLOR; + int texture_index: TEXTURE_INDEX; + float4 position : POSITION; +}; + +struct PS_INPUT +{ + float4 position : SV_POSITION; + float2 uv : TEXCOORD0; + float4 color : COLOR; + int texture_index: TEXTURE_INDEX; +}; + +PS_INPUT vs_main(VS_INPUT input) +{ + PS_INPUT output; + output.position = input.position; + output.uv = input.uv; + output.color = input.color; + output.texture_index = input.texture_index; + return output; +} + +// #Magicvalue +Texture2D textures[32] : register(t0); +SamplerState image_sampler : register(s0); + +float4 sample_texture(int texture_index, float2 uv) { + // #Portability sigh + if (texture_index == 0) return textures[0].Sample(image_sampler, uv); + else if (texture_index == 1) return textures[1].Sample(image_sampler, uv); + else if (texture_index == 2) return textures[2].Sample(image_sampler, uv); + else if (texture_index == 3) return textures[3].Sample(image_sampler, uv); + else if (texture_index == 4) return textures[4].Sample(image_sampler, uv); + else if (texture_index == 5) return textures[5].Sample(image_sampler, uv); + else if (texture_index == 6) return textures[6].Sample(image_sampler, uv); + else if (texture_index == 7) return textures[7].Sample(image_sampler, uv); + else if (texture_index == 8) return textures[8].Sample(image_sampler, uv); + else if (texture_index == 9) return textures[9].Sample(image_sampler, uv); + else if (texture_index == 10) return textures[10].Sample(image_sampler, uv); + else if (texture_index == 11) return textures[11].Sample(image_sampler, uv); + else if (texture_index == 12) return textures[12].Sample(image_sampler, uv); + else if (texture_index == 13) return textures[13].Sample(image_sampler, uv); + else if (texture_index == 14) return textures[14].Sample(image_sampler, uv); + else if (texture_index == 15) return textures[15].Sample(image_sampler, uv); + else if (texture_index == 16) return textures[16].Sample(image_sampler, uv); + else if (texture_index == 17) return textures[17].Sample(image_sampler, uv); + else if (texture_index == 18) return textures[18].Sample(image_sampler, uv); + else if (texture_index == 19) return textures[19].Sample(image_sampler, uv); + else if (texture_index == 20) return textures[20].Sample(image_sampler, uv); + else if (texture_index == 21) return textures[21].Sample(image_sampler, uv); + else if (texture_index == 22) return textures[22].Sample(image_sampler, uv); + else if (texture_index == 23) return textures[23].Sample(image_sampler, uv); + else if (texture_index == 24) return textures[24].Sample(image_sampler, uv); + else if (texture_index == 25) return textures[25].Sample(image_sampler, uv); + else if (texture_index == 26) return textures[26].Sample(image_sampler, uv); + else if (texture_index == 27) return textures[27].Sample(image_sampler, uv); + else if (texture_index == 28) return textures[28].Sample(image_sampler, uv); + else if (texture_index == 29) return textures[29].Sample(image_sampler, uv); + else if (texture_index == 30) return textures[30].Sample(image_sampler, uv); + else if (texture_index == 31) return textures[31].Sample(image_sampler, uv); + return float4(1.0, 0.0, 0.0, 1.0); +} + +float4 ps_main(PS_INPUT input) : SV_TARGET +{ + if (input.texture_index >= 0) { + return sample_texture(input.texture_index, input.uv); + } else { + return input.color; + } +} +*/ + +const u8 IMAGE_SHADER_VERTEX_BLOB_BYTES[] = { +0x44, 0x58, 0x42, 0x43, 0xdd, 0x02, 0x55, 0xb0, 0x7b, 0x83, 0x6c, 0x34, 0x45, 0xe8, 0x51, 0xd4, +0x76, 0xbf, 0x66, 0x77, 0x01, 0x00, 0x00, 0x00, 0x3c, 0x03, 0x00, 0x00, 0x05, 0x00, 0x00, +0x00, 0x34, 0x00, 0x00, 0x00, 0xa0, 0x00, 0x00, 0x00, 0x38, 0x01, 0x00, 0x00, 0xd4, 0x01, +0x00, 0x00, 0xa0, 0x02, 0x00, 0x00, 0x52, 0x44, 0x45, 0x46, 0x64, 0x00, 0x00, 0x00, 0x00, +0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x00, +0x00, 0x05, 0xfe, 0xff, 0x00, 0x01, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x00, 0x52, 0x44, 0x31, +0x31, 0x3c, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x28, 0x00, +0x00, 0x00, 0x24, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4d, +0x69, 0x63, 0x72, 0x6f, 0x73, 0x6f, 0x66, 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0x00, 0x00, 0x00, 0x00, 0x00, +0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, +0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, +0x00, 0x00, 0x00, 0x00 +}; diff --git a/oogabooga/dev/d3d11_image_shader.hlsl b/oogabooga/dev/d3d11_image_shader.hlsl new file mode 100644 index 0000000..a6a0122 --- /dev/null +++ b/oogabooga/dev/d3d11_image_shader.hlsl @@ -0,0 +1,75 @@ +struct VS_INPUT +{ + float2 uv : TEXCOORD; + float4 color : COLOR; + int texture_index: TEXTURE_INDEX; + float4 position : POSITION; +}; + +struct PS_INPUT +{ + float4 position : SV_POSITION; + float2 uv : TEXCOORD0; + float4 color : COLOR; + int texture_index: TEXTURE_INDEX; +}; + +PS_INPUT vs_main(VS_INPUT input) +{ + PS_INPUT output; + output.position = input.position; + output.uv = input.uv; + output.color = input.color; + output.texture_index = input.texture_index; + return output; +} + +// #Magicvalue +Texture2D textures[32] : register(t0); +SamplerState image_sampler : register(s0); + +float4 sample_texture(int texture_index, float2 uv) { + // #Portability sigh + if (texture_index == 0) return textures[0].Sample(image_sampler, uv); + else if (texture_index == 1) return textures[1].Sample(image_sampler, uv); + else if (texture_index == 2) return textures[2].Sample(image_sampler, uv); + else if (texture_index == 3) return textures[3].Sample(image_sampler, uv); + else if (texture_index == 4) return textures[4].Sample(image_sampler, uv); + else if (texture_index == 5) return textures[5].Sample(image_sampler, uv); + else if (texture_index == 6) return textures[6].Sample(image_sampler, uv); + else if (texture_index == 7) return textures[7].Sample(image_sampler, uv); + else if (texture_index == 8) return textures[8].Sample(image_sampler, uv); + else if (texture_index == 9) return textures[9].Sample(image_sampler, uv); + else if (texture_index == 10) return textures[10].Sample(image_sampler, uv); + else if (texture_index == 11) return textures[11].Sample(image_sampler, uv); + else if (texture_index == 12) return textures[12].Sample(image_sampler, uv); + else if (texture_index == 13) return textures[13].Sample(image_sampler, uv); + else if (texture_index == 14) return textures[14].Sample(image_sampler, uv); + else if (texture_index == 15) return textures[15].Sample(image_sampler, uv); + else if (texture_index == 16) return textures[16].Sample(image_sampler, uv); + else if (texture_index == 17) return textures[17].Sample(image_sampler, uv); + else if (texture_index == 18) return textures[18].Sample(image_sampler, uv); + else if (texture_index == 19) return textures[19].Sample(image_sampler, uv); + else if (texture_index == 20) return textures[20].Sample(image_sampler, uv); + else if (texture_index == 21) return textures[21].Sample(image_sampler, uv); + else if (texture_index == 22) return textures[22].Sample(image_sampler, uv); + else if (texture_index == 23) return textures[23].Sample(image_sampler, uv); + else if (texture_index == 24) return textures[24].Sample(image_sampler, uv); + else if (texture_index == 25) return textures[25].Sample(image_sampler, uv); + else if (texture_index == 26) return textures[26].Sample(image_sampler, uv); + else if (texture_index == 27) return textures[27].Sample(image_sampler, uv); + else if (texture_index == 28) return textures[28].Sample(image_sampler, uv); + else if (texture_index == 29) return textures[29].Sample(image_sampler, uv); + else if (texture_index == 30) return textures[30].Sample(image_sampler, uv); + else if (texture_index == 31) return textures[31].Sample(image_sampler, uv); + return float4(1.0, 0.0, 0.0, 1.0); +} + +float4 ps_main(PS_INPUT input) : SV_TARGET +{ + if (input.texture_index >= 0) { + return sample_texture(input.texture_index, input.uv); + } else { + return input.color; + } +} \ No newline at end of file diff --git a/oogabooga/drawing.c b/oogabooga/drawing.c index 7ea2e8c..3c686b6 100644 --- a/oogabooga/drawing.c +++ b/oogabooga/drawing.c @@ -13,9 +13,10 @@ Usage: quad.top_left = v2(x, y); quad.top_right = v2(x, y); quad.bottom_right = v2(x, y); + quad.color = v4(r, g, b, a); + quad.image = my_image; // ZERO(Gfx_Image) To draw a plain color + quad.uv = v4(0, 0, 1, 1); - quad.color = v4(r, g, b, a); - draw_quad(quad); @@ -26,15 +27,41 @@ Usage: // With a centered pivot (half size) and a rotation of 2.4 radians // If pivot is v2(0, 0), the rectangle will rotate around it's bottom left. draw_rect_rotated(v2(-0.25, -0.5), v2(0.5, 0.5), COLOR_GREEN, v2(0.25, 0.25), 2.4f); + + // Basic image. Bottom left at X=-0.25, Y=-0.5 with a size of W=0.5, H=0.5 + draw_image(v2(-0.25, -0.5), v2(0.5, 0.5), COLOR_GREEN); + + // Rotated image. Bottom left at X=-0.25, Y=-0.5 with a size of W=0.5, H=0.5 + // With a centered pivot (half size) and a rotation of 2.4 radians + // If pivot is v2(0, 0), the rectangle will rotate around it's bottom left. + draw_image_rotated(v2(-0.25, -0.5), v2(0.5, 0.5), COLOR_GREEN, v2(0.25, 0.25), 2.4f); + + // Loading an image (png only) + Gfx_Image image = load_image_from_disk("my_image.png"); + if (!image.data) { + // We failed loading the image. + } + + // If you ever need to free the image: + delete_image(image); */ -#define QUADS_PER_BLOCK 1024 + + + + + + +#define QUADS_PER_BLOCK 1024 typedef struct Draw_Quad { Vector2 bottom_left, top_left, top_right, bottom_right; // r, g, b, a Vector4 color; + Gfx_Image *image; + // x1, y1, x2, y2 + Vector4 uv; } Draw_Quad; typedef struct Draw_Quad_Block { @@ -47,15 +74,37 @@ typedef struct Draw_Quad_Block { typedef struct Draw_Frame { Draw_Quad_Block first_block; Draw_Quad_Block *current; + u64 num_blocks; + + Matrix4 projection; + Matrix4 view; + + Gfx_Handle garbage_stack[4096]; + u64 garbage_stack_count; } Draw_Frame; - // This frame is passed to the platform layer and rendered in os_update. // Resets every frame. Draw_Frame draw_frame = ZERO(Draw_Frame); -void draw_quad(Draw_Quad quad) { +void reset_draw_frame(Draw_Frame *frame) { + *frame = (Draw_Frame){0}; + + float32 aspect = (float32)window.width/(float32)window.height; + + frame->projection = m4_make_orthographic_projection(-aspect, aspect, -1, 1, -1, 10); + frame->view = m4_scalar(1.0); +} + +Draw_Quad *draw_quad_projected(Draw_Quad quad, Matrix4 world_to_clip) { + quad.bottom_left = m4_transform(world_to_clip, v4(v2_expand(quad.bottom_left), 0, 1)).xy; + quad.top_left = m4_transform(world_to_clip, v4(v2_expand(quad.top_left), 0, 1)).xy; + quad.top_right = m4_transform(world_to_clip, v4(v2_expand(quad.top_right), 0, 1)).xy; + quad.bottom_right = m4_transform(world_to_clip, v4(v2_expand(quad.bottom_right), 0, 1)).xy; + if (!draw_frame.current) draw_frame.current = &draw_frame.first_block; + if (draw_frame.current == &draw_frame.first_block) draw_frame.num_blocks = 1; + assert(draw_frame.current->num_quads <= QUADS_PER_BLOCK); if (draw_frame.current->num_quads == QUADS_PER_BLOCK) { @@ -64,13 +113,26 @@ void draw_quad(Draw_Quad quad) { draw_frame.current->next = 0; draw_frame.current->num_quads = 0; + + draw_frame.num_blocks += 1; } draw_frame.current->quad_buffer[draw_frame.current->num_quads] = quad; draw_frame.current->num_quads += 1; + + return &draw_frame.current->quad_buffer[draw_frame.current->num_quads-1]; +} +Draw_Quad *draw_quad(Draw_Quad quad) { + return draw_quad_projected(quad, m4_multiply(m4_inverse(draw_frame.view), draw_frame.projection)); } -void draw_rect(Vector2 position, Vector2 size, Vector4 color) { +Draw_Quad *draw_quad_xform(Draw_Quad quad, Matrix4 xform) { + Matrix4 world_to_clip = m4_multiply(m4_inverse(draw_frame.view), xform); + world_to_clip = m4_multiply(world_to_clip, draw_frame.projection); + return draw_quad_projected(quad, world_to_clip); +} + +Draw_Quad *draw_rect(Vector2 position, Vector2 size, Vector4 color) { const float32 left = position.x; const float32 right = position.x + size.x; const float32 bottom = position.y; @@ -82,34 +144,103 @@ void draw_rect(Vector2 position, Vector2 size, Vector4 color) { q.top_right = v2(right, top); q.bottom_right = v2(right, bottom); q.color = color; + q.image = 0; - draw_quad(q); + return draw_quad(q); } -void draw_rect_rotated(Vector2 position, Vector2 size, Vector4 color, Vector2 local_pivot, float32 rotation) { - - const float32 left = position.x; - const float32 right = position.x + size.x; - const float32 bottom = position.y; - const float32 top = position.y+size.y; +Draw_Quad *draw_rect_xform(Matrix4 xform, Vector2 size, Vector4 color) { + Draw_Quad q = ZERO(Draw_Quad); + q.bottom_left = v2(0, 0); + q.top_left = v2(0, size.y); + q.top_right = v2(size.x, size.y); + q.bottom_right = v2(size.x, 0); + q.color = color; + q.image = 0; - Vector2 bottom_left = v2(left, bottom); - Vector2 top_left = v2(left, top); - Vector2 top_right = v2(right, top); - Vector2 bottom_right = v2(right, bottom); - - Vector2 pivot = v2(position.x + local_pivot.x, position.y + local_pivot.y); - - Draw_Quad q; - q.bottom_left = v2_rotate_point_around_pivot(bottom_left, pivot, rotation); - q.top_left = v2_rotate_point_around_pivot(top_left, pivot, rotation); - q.top_right = v2_rotate_point_around_pivot(top_right, pivot, rotation); - q.bottom_right = v2_rotate_point_around_pivot(bottom_right, pivot, rotation); - q.color = color; - - draw_quad(q); + return draw_quad_xform(q, xform); +} +Draw_Quad *draw_image(Gfx_Image *image, Vector2 position, Vector2 size, Vector4 color) { + Draw_Quad *q = draw_rect(position, size, color); + + q->image = image; + q->uv = v4(0, 0, 1, 1); + + return q; +} +Draw_Quad *draw_image_xform(Gfx_Image *image, Matrix4 xform, Vector2 size, Vector4 color) { + Draw_Quad *q = draw_rect_xform(xform, size, color); + + q->image = image; + q->uv = v4(0, 0, 1, 1); + + return q; } #define COLOR_RED ((Vector4){1.0, 0.0, 0.0, 1.0}) #define COLOR_GREEN ((Vector4){0.0, 1.0, 0.0, 1.0}) -#define COLOR_BLUE ((Vector4){0.0, 0.0, 1.0, 1.0}) \ No newline at end of file +#define COLOR_BLUE ((Vector4){0.0, 0.0, 1.0, 1.0}) +#define COLOR_WHITE ((Vector4){1.0, 1.0, 1.0, 1.0}) +#define COLOR_BLACK ((Vector4){0.0, 0.0, 0.0, 1.0}) + +// context.allocator +Gfx_Image *load_image_from_disk(string path) { + string png; + bool ok = os_read_entire_file(path, &png); + if (!ok) return 0; + + Gfx_Image *image = alloc(sizeof(Gfx_Image)); + + // This is fucking terrible I gotta write my own decoder + + LodePNGState state; + lodepng_state_init(&state); + u32 error = lodepng_inspect(&image->width, &image->height, &state, png.data, png.count); + if (error) { + return 0; + } + + // 5 lines of code to say "ignore_adler32 = true" (because it's broken and gives me an error) + // I JUST WANT TO LOAD A PNG + LodePNGDecoderSettings decoder; + lodepng_decoder_settings_init(&decoder); + lodepng_decompress_settings_init(&decoder.zlibsettings); + decoder.zlibsettings.ignore_adler32 = true; + state.decoder = decoder; + + error = lodepng_decode(&image->data, &image->width, &image->height, &state, png.data, png.count); + + lodepng_state_cleanup(&state); + + dealloc_string(png); + + if (error) { + return 0; + } + + // We need to flip the image + u32 row_bytes = image->width * 4; // #Magicvalue assuming 4 bytes + u8* temp_row = (u8*)alloc(row_bytes); + for (u32 i = 0; i < image->height / 2; i++) { + u8* top_row = image->data + i * row_bytes; + u8* bottom_row = image->data + (image->height - i - 1) * row_bytes; + + // Swap the top row with the bottom row + memcpy(temp_row, top_row, row_bytes); + memcpy(top_row, bottom_row, row_bytes); + memcpy(bottom_row, temp_row, row_bytes); + } + dealloc(temp_row); + + image->gfx_handle = GFX_INVALID_HANDLE; // This is handled in gfx + + return image; +} +void delete_image(Gfx_Image *image) { + dealloc(image->data); + image->width = 0; + image->height = 0; + draw_frame.garbage_stack[draw_frame.garbage_stack_count] = image->gfx_handle; + draw_frame.garbage_stack_count += 1; + dealloc(image); +} \ No newline at end of file diff --git a/oogabooga/gfx_impl_d3d11.c b/oogabooga/gfx_impl_d3d11.c index e69de29..a2384f4 100644 --- a/oogabooga/gfx_impl_d3d11.c +++ b/oogabooga/gfx_impl_d3d11.c @@ -0,0 +1,637 @@ + + +#if !OOGABOOGA_DEV + +#include "d3d11_image_shader_bytecode.c" + +#endif + +#define D3D11Release(x) x->lpVtbl->Release(x) +#define VTABLE(proc, ...) FIRST_ARG(__VA_ARGS__)->lpVtbl->proc(__VA_ARGS__) + +const Gfx_Handle GFX_INVALID_HANDLE = 0; + +string temp_win32_null_terminated_wide_to_fixed_utf8(const u16 *utf16); + +typedef struct D3D11_Vertex { + Vector4 position; + Vector2 uv; + Vector4 color; + int texture_index; +} D3D11_Vertex; + +ID3D11Debug *d3d11_debug = 0; + +ID3D11Device* d3d11_device = 0; +ID3D11DeviceContext* d3d11_context = 0; +ID3D11RenderTargetView *d3d11_window_render_target_view = 0; +ID3D11Texture2D *d3d11_back_buffer = 0; +D3D_DRIVER_TYPE d3d11_driver_type = 0; +D3D_FEATURE_LEVEL d3d11_feature_level = 0; + +IDXGISwapChain1 *d3d11_swap_chain = 0; +DXGI_SWAP_CHAIN_DESC1 d3d11_swap_chain_desc = ZERO(DXGI_SWAP_CHAIN_DESC1); +u32 d3d11_swap_chain_width = 0; +u32 d3d11_swap_chain_height = 0; + +ID3D11BlendState *d3d11_blend_state = 0; +ID3D11RasterizerState *d3d11_rasterizer = 0; +ID3D11SamplerState *d3d11_image_sampler = 0; + +ID3D11VertexShader *d3d11_image_vertex_shader = 0; +ID3D11PixelShader *d3d11_image_pixel_shader = 0; +ID3D11InputLayout *d3d11_image_vertex_layout = 0; + +ID3D11Buffer *d3d11_quad_vbo = 0; +u32 d3d11_quad_vbo_size = 0; + +#define win32_check_hr(hr) win32_check_hr_impl(hr, __LINE__, __FILE__); +void win32_check_hr_impl(HRESULT hr, u32 line, const char* file_name) { + if (FAILED(hr)) { + LPVOID errorMsg; + DWORD dwFlags = FORMAT_MESSAGE_ALLOCATE_BUFFER | + FORMAT_MESSAGE_FROM_SYSTEM | + FORMAT_MESSAGE_IGNORE_INSERTS; + + DWORD messageLength = FormatMessage( + dwFlags, + NULL, + hr, + MAKELANGID(LANG_ENGLISH, SUBLANG_DEFAULT), + (LPTSTR) &errorMsg, + 0, + NULL ); + + if (messageLength > 0) { + MessageBox(NULL, (LPCTSTR)errorMsg, TEXT("Error"), MB_OK | MB_ICONERROR); + } else { + MessageBox(NULL, TEXT("Failed to retrieve error message."), TEXT("Error"), MB_OK | MB_ICONERROR); + } + + panic("win32 hr failed in file %cs on line %d", file_name, line); + } +} + +void d3d11_update_swapchain() { + + HRESULT hr; + bool create = !d3d11_swap_chain; + + if (create) { + DXGI_SWAP_CHAIN_DESC1 scd = ZERO(DXGI_SWAP_CHAIN_DESC1); + scd.Format = DXGI_FORMAT_R8G8B8A8_UNORM; + //scd.BufferDesc.RefreshRate.Numerator = xx st.refresh_rate; + //scd.BufferDesc.RefreshRate.Denominator = 1; + + scd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT; + scd.SampleDesc.Count = 1; + scd.SampleDesc.Quality = 0; + if (d3d11_feature_level < D3D_FEATURE_LEVEL_11_0) { + scd.Scaling = DXGI_SCALING_STRETCH; // for compatability with 7 + } + + // Windows 10 allows to use DXGI_SWAP_EFFECT_FLIP_DISCARD + // for Windows 8 compatibility use DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL + // for Windows 7 compatibility use DXGI_SWAP_EFFECT_DISCARD + if (d3d11_feature_level >= D3D_FEATURE_LEVEL_11_0) { + // this is supported only on FLIP presentation model + scd.Scaling = DXGI_SCALING_NONE; + scd.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL; + scd.BufferCount = 3; + gfx._can_vsync = false; + log_verbose("Present mode is flip discard, 3 buffers"); + } else { + scd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD; + scd.BufferCount = 2; + gfx._can_vsync = true; + log_verbose("Present mode is discard, 2 buffers"); + } + + // Obtain DXGI factory from device + IDXGIDevice *dxgi_device; + hr = VTABLE(QueryInterface, d3d11_device, &IID_IDXGIDevice, cast(void**)&dxgi_device); + win32_check_hr(hr); + + IDXGIAdapter *adapter; + hr = VTABLE(GetAdapter, dxgi_device, &adapter); + win32_check_hr(hr); + + IDXGIFactory2 *dxgi_factory; + hr = VTABLE(GetParent, adapter, &IID_IDXGIFactory2, cast(void**)&dxgi_factory); + win32_check_hr(hr); + + hr = VTABLE(CreateSwapChainForHwnd, dxgi_factory, (IUnknown*)d3d11_device, window._os_handle, &scd, 0, 0, &d3d11_swap_chain); + win32_check_hr(hr); + + RECT client_rect; + bool ok = GetClientRect(window._os_handle, &client_rect); + assert(ok, "GetClientRect failed with error code %lu", GetLastError()); + + d3d11_swap_chain_width = client_rect.right-client_rect.left; + d3d11_swap_chain_height = client_rect.bottom-client_rect.top; + + // store the swap chain description, as created by CreateSwapChainForHwnd + hr = VTABLE(GetDesc1, d3d11_swap_chain, &d3d11_swap_chain_desc); + win32_check_hr(hr); + + // disable alt enter + VTABLE(MakeWindowAssociation, dxgi_factory, window._os_handle, cast (u32) DXGI_MWA_NO_ALT_ENTER); + + D3D11Release(dxgi_device); + D3D11Release(adapter); + D3D11Release(dxgi_factory); + + log("Created swap chain of size %dx%d", d3d11_swap_chain_width, d3d11_swap_chain_height); + } else { + if (d3d11_window_render_target_view) D3D11Release(d3d11_window_render_target_view); + if (d3d11_back_buffer) D3D11Release(d3d11_back_buffer); + + RECT client_rect; + bool ok = GetClientRect(window._os_handle, &client_rect); + assert(ok, "GetClientRect failed with error code %lu", GetLastError()); + + u32 window_width = client_rect.right-client_rect.left; + u32 window_height = client_rect.bottom-client_rect.top; + + hr = VTABLE(ResizeBuffers, d3d11_swap_chain, d3d11_swap_chain_desc.BufferCount, window_width, window_height, d3d11_swap_chain_desc.Format, d3d11_swap_chain_desc.Flags); + win32_check_hr(hr); + + // update swap chain description + hr = VTABLE(GetDesc1, d3d11_swap_chain, &d3d11_swap_chain_desc); + win32_check_hr(hr); + + log("Resized swap chain from %dx%d to %dx%d", d3d11_swap_chain_width, d3d11_swap_chain_height, window_width, window_height); + + d3d11_swap_chain_width = window_width; + d3d11_swap_chain_height = window_height; + } + + + + + hr = VTABLE(GetBuffer, d3d11_swap_chain, 0, &IID_ID3D11Texture2D, (void**)&d3d11_back_buffer); + win32_check_hr(hr); + hr = VTABLE(CreateRenderTargetView, d3d11_device, (ID3D11Resource*)d3d11_back_buffer, 0, &d3d11_window_render_target_view); + win32_check_hr(hr); +} + +void gfx_init() { + + gfx.enable_vsync = false; + + log_verbose("d3d11 gfx_init"); + + HWND hwnd = window._os_handle; + HRESULT hr = S_OK; + + D3D11_CREATE_DEVICE_FLAG flags = 0; +#if CONFIGURATION == DEBUG + flags |= D3D11_CREATE_DEVICE_DEBUG; +#endif + + D3D_DRIVER_TYPE driver_types[] = { + D3D_DRIVER_TYPE_HARDWARE, + D3D_DRIVER_TYPE_WARP, + D3D_DRIVER_TYPE_REFERENCE + }; + s64 num_drivers = sizeof(driver_types)/sizeof(D3D_DRIVER_TYPE); + + D3D_FEATURE_LEVEL feature_levels[] = { + D3D_FEATURE_LEVEL_11_1, + D3D_FEATURE_LEVEL_11_0, + D3D_FEATURE_LEVEL_10_1, + D3D_FEATURE_LEVEL_10_0 + }; + s64 num_feature_levels = sizeof(feature_levels)/sizeof(D3D_FEATURE_LEVEL); + + for (s64 i = 0; i < num_drivers; i++) { + d3d11_driver_type = driver_types[i]; + + hr = D3D11CreateDevice(0, d3d11_driver_type, 0, flags, feature_levels, num_feature_levels, D3D11_SDK_VERSION, &d3d11_device, &d3d11_feature_level, &d3d11_context); + + if (hr == E_INVALIDARG) { + // 11_1 not recognized in 11.0 + hr = D3D11CreateDevice(0, d3d11_driver_type, 0, flags, feature_levels+1, num_feature_levels-1, D3D11_SDK_VERSION, &d3d11_device, &d3d11_feature_level, &d3d11_context); + } + + if (SUCCEEDED(hr)) break; + + log_verbose("Failed driver type number %d (%d)", i, driver_types[i]); + } + + win32_check_hr(hr); + assert(d3d11_device != 0, "D3D11CreateDevice failed"); + +#if CONFIGURATION == DEBUG + hr = VTABLE(QueryInterface, d3d11_device, &IID_ID3D11Debug, (void**)&d3d11_debug); + if (SUCCEEDED(hr)) { + log_verbose("D3D11 debug is active"); + } +#endif + + log_verbose("Created D3D11 device"); + + IDXGIDevice *dxgi_device = 0; + IDXGIAdapter *target_adapter = 0; + hr = VTABLE(QueryInterface, d3d11_device, &IID_IDXGIDevice, (void **)&dxgi_device); + + + hr = VTABLE(GetAdapter, dxgi_device, &target_adapter); + if (SUCCEEDED(hr)) { + DXGI_ADAPTER_DESC adapter_desc = ZERO(DXGI_ADAPTER_DESC); + hr = VTABLE(GetDesc, target_adapter, &adapter_desc); + if (SUCCEEDED(hr)) { + string desc = temp_win32_null_terminated_wide_to_fixed_utf8(adapter_desc.Description); + log("D3D11 adapter is: %s", desc); + } else { + log_error("Failed to get adapter description"); + } + } else { + log_error("Failed querying targeted d3d11_ adapter"); + } + + d3d11_update_swapchain(); + + { + D3D11_BLEND_DESC bd = ZERO(D3D11_BLEND_DESC); + bd.RenderTarget[0].BlendEnable = TRUE; + bd.RenderTarget[0].SrcBlend = D3D11_BLEND_SRC_ALPHA; + bd.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA; + bd.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD; + bd.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_ONE; + bd.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ZERO; + bd.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD; + bd.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL; + hr = VTABLE(CreateBlendState, d3d11_device, &bd, &d3d11_blend_state); + win32_check_hr(hr); + VTABLE(OMSetBlendState, d3d11_context, d3d11_blend_state, NULL, 0xffffffff); + } + + { + D3D11_RASTERIZER_DESC desc = ZERO(D3D11_RASTERIZER_DESC); + desc.FillMode = D3D11_FILL_SOLID; + //desc.CullMode = D3D11_CULL_BACK; + desc.FrontCounterClockwise = FALSE; + desc.DepthClipEnable = FALSE; + desc.CullMode = D3D11_CULL_NONE; + hr = VTABLE(CreateRasterizerState, d3d11_device, &desc, &d3d11_rasterizer); + win32_check_hr(hr); + VTABLE(RSSetState, d3d11_context, d3d11_rasterizer); + } + + // COnst buffer + /*{ + D3D11_BUFFER_DESC bd; + bd.ByteWidth = align_forward(sizeof(GlobalConstBuffer), 16); + bd.Usage = D3D11_USAGE_DYNAMIC; + bd.BindFlags = D3D11_BIND_CONSTANT_BUFFER; + bd.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE; + ID3D11Device_CreateBuffer(dx_state.d3d_device, &bd, NULL, &dx_state.const_buffer_resource); + }*/ + + /*{ + D3D11_BUFFER_DESC bd; + bd.ByteWidth = align_forward(sizeof(BatchUniforms), 16); + bd.Usage = D3D11_USAGE_DYNAMIC; + bd.BindFlags = D3D11_BIND_CONSTANT_BUFFER; + bd.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE; + ID3D11Device_CreateBuffer(dx_state.d3d_device, &bd, NULL, &render_st.batch.ubo); + }*/ + + { + D3D11_SAMPLER_DESC sd = ZERO(D3D11_SAMPLER_DESC); + sd.Filter = D3D11_FILTER_MIN_MAG_MIP_POINT; + sd.AddressU = D3D11_TEXTURE_ADDRESS_CLAMP; + sd.AddressV = D3D11_TEXTURE_ADDRESS_CLAMP; + sd.AddressW = D3D11_TEXTURE_ADDRESS_CLAMP; + sd.ComparisonFunc = D3D11_COMPARISON_NEVER; + hr = VTABLE(CreateSamplerState, d3d11_device, &sd, &d3d11_image_sampler); + win32_check_hr(hr); + } + + // We are ooga booga devs so we read the file and compile +#if OOGABOOGA_DEV + + string source; + bool source_ok = os_read_entire_file(fxstr("oogabooga/dev/d3d11_image_shader.hlsl"), &source); + assert(source_ok, "Could not open d3d11_image_shader source"); + + // Compile vertex shader + ID3DBlob* vs_blob = NULL; + ID3DBlob* err_blob = NULL; + hr = D3DCompile((char*)source.data, source.count, 0, 0, 0, "vs_main", "vs_5_0", 0, 0, &vs_blob, &err_blob); + assert(SUCCEEDED(hr), "Vertex Shader Compilation Error: %cs\n", (char*)VTABLE(GetBufferPointer, err_blob)); + + // Compile pixel shader + ID3DBlob* ps_blob = NULL; + hr = D3DCompile((char*)source.data, source.count, 0, 0, 0, "ps_main", "ps_5_0", 0, 0, &ps_blob, &err_blob); + assert(SUCCEEDED(hr), "Vertex Shader Compilation Error: %cs\n", (char*)VTABLE(GetBufferPointer, err_blob)); + + void *vs_buffer = VTABLE(GetBufferPointer, vs_blob); + u64 vs_size = VTABLE(GetBufferSize, vs_blob); + void *ps_buffer = VTABLE(GetBufferPointer, ps_blob); + u64 ps_size = VTABLE(GetBufferSize, ps_blob); + + log_verbose("Shaders compiled"); + + /// + // Dump blobs to the .c + File blob_file = os_file_open(fxstr("oogabooga/d3d11_image_shader_bytecode.c"), O_WRITE | O_CREATE); + os_file_write_string(blob_file, fxstr("/*\n")); + os_file_write_string(blob_file, fxstr("<<<<<< Bytecode compiled from HLSL code below: >>>>>>\n\n")); + os_file_write_string(blob_file, source); + os_file_write_string(blob_file, fxstr("\n*/\n\n")); + + os_file_write_string(blob_file, fxstr("const u8 IMAGE_SHADER_VERTEX_BLOB_BYTES[] = {\n")); + for (u64 i = 0; i < vs_size; i++) { + os_file_write_string(blob_file, tprint("0x%02x", (int)((u8*)vs_buffer)[i])); + if (i < vs_size-1) os_file_write_string(blob_file, fxstr(", ")); + if (i % 15 == 0 && i != 0) os_file_write_string(blob_file, fxstr("\n")); + } + os_file_write_string(blob_file, fxstr("\n};\n")); + + os_file_write_string(blob_file, fxstr("const u8 IMAGE_SHADER_PIXEL_BLOB_BYTES[] = {\n")); + for (u64 i = 0; i < ps_size; i++) { + os_file_write_string(blob_file, tprint("0x%02x", (int)((u8*)ps_buffer)[i])); + if (i < ps_size-1) os_file_write_string(blob_file, fxstr(", ")); + if (i % 15 == 0 && i != 0) os_file_write_string(blob_file, fxstr("\n")); + } + os_file_write_string(blob_file, fxstr("\n};\n")); + os_file_close(blob_file); + + +#else + + const void *vs_buffer = IMAGE_SHADER_VERTEX_BLOB_BYTES; + u64 vs_size = sizeof(IMAGE_SHADER_VERTEX_BLOB_BYTES); + const void *ps_buffer = IMAGE_SHADER_PIXEL_BLOB_BYTES; + u64 ps_size = sizeof(IMAGE_SHADER_PIXEL_BLOB_BYTES); + + log_verbose("Cached shaders loaded"); +#endif + + // Create the shaders + hr = VTABLE(CreateVertexShader, d3d11_device, vs_buffer, vs_size, NULL, &d3d11_image_vertex_shader); + win32_check_hr(hr); + + hr = VTABLE(CreatePixelShader, d3d11_device, ps_buffer, ps_size, NULL, &d3d11_image_pixel_shader); + win32_check_hr(hr); + + log_verbose("Shaders created"); + +#if OOGABOOGA_DEV + D3D11Release(vs_blob); + D3D11Release(ps_blob); +#endif + + D3D11_INPUT_ELEMENT_DESC layout[4]; + memset(layout, 0, sizeof(layout)); + + layout[0] = (D3D11_INPUT_ELEMENT_DESC){ + "POSITION", 0, + DXGI_FORMAT_R32G32B32A32_FLOAT, 0, + offsetof(D3D11_Vertex, position), + D3D11_INPUT_PER_VERTEX_DATA, 0 + }; + layout[1] = (D3D11_INPUT_ELEMENT_DESC){ + "TEXCOORD", 0, + DXGI_FORMAT_R32G32_FLOAT, 0, + offsetof(D3D11_Vertex, uv), + D3D11_INPUT_PER_VERTEX_DATA, 0 + }; + layout[2] = (D3D11_INPUT_ELEMENT_DESC){ + "COLOR", 0, + DXGI_FORMAT_R32G32B32A32_FLOAT, 0, + offsetof(D3D11_Vertex, color), + D3D11_INPUT_PER_VERTEX_DATA, 0 + }; + layout[3] = (D3D11_INPUT_ELEMENT_DESC){ + "TEXTURE_INDEX", 0, + DXGI_FORMAT_R32_SINT, 0, + offsetof(D3D11_Vertex, texture_index), + D3D11_INPUT_PER_VERTEX_DATA, 0 + }; + + hr = VTABLE(CreateInputLayout, d3d11_device, layout, 4, vs_buffer, vs_size, &d3d11_image_vertex_layout); + + log_info("D3D11 init done"); +} + +void d3d11_draw_call(int number_of_rendered_quads, ID3D11ShaderResourceView **textures, u64 num_textures) { + VTABLE(OMSetBlendState, d3d11_context, d3d11_blend_state, 0, 0xffffffff); + VTABLE(OMSetRenderTargets, d3d11_context, 1, &d3d11_window_render_target_view, 0); + VTABLE(RSSetState, d3d11_context, d3d11_rasterizer); + D3D11_VIEWPORT viewport = ZERO(D3D11_VIEWPORT); + viewport.Width = d3d11_swap_chain_width; + viewport.Height = d3d11_swap_chain_height; + viewport.MaxDepth = 1.0; + VTABLE(RSSetViewports, d3d11_context, 1, &viewport); + + UINT stride = sizeof(D3D11_Vertex); + UINT offset = 0; + + VTABLE(IASetInputLayout, d3d11_context, d3d11_image_vertex_layout); + VTABLE(IASetVertexBuffers, d3d11_context, 0, 1, &d3d11_quad_vbo, &stride, &offset); + VTABLE(IASetPrimitiveTopology, d3d11_context, D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST); + + VTABLE(VSSetShader, d3d11_context, d3d11_image_vertex_shader, NULL, 0); + VTABLE(PSSetShader, d3d11_context, d3d11_image_pixel_shader, NULL, 0); + + VTABLE(PSSetSamplers, d3d11_context, 0, 1, &d3d11_image_sampler); + VTABLE(PSSetShaderResources, d3d11_context, 0, num_textures, textures); + + VTABLE(ClearRenderTargetView, d3d11_context, d3d11_window_render_target_view, (float*)&window.clear_color); + + VTABLE(Draw, d3d11_context, number_of_rendered_quads * 6, 0); +} + +void gfx_update() { + + if (window.should_close) return; + + VTABLE(ClearRenderTargetView, d3d11_context, d3d11_window_render_target_view, (float*)&window.clear_color); + + f64 rest_before = os_get_current_time_in_seconds(); + + HRESULT hr; + + /// + // purge garbage + for (u64 i = 0; i < draw_frame.garbage_stack_count; i++) { + ID3D11ShaderResourceView *view = draw_frame.garbage_stack[i]; + ID3D11Resource *resource = 0; + VTABLE(GetResource, view, &resource); + + ID3D11Texture2D *texture = 0; + hr = VTABLE(QueryInterface, resource, &IID_ID3D11Texture2D, (void**)&texture); + if (SUCCEEDED(hr)) { + D3D11Release(view); + D3D11Release(texture); + log("Destroyed an image"); + } else { + panic("Unhandled D3D11 resource deletion"); + } + } + + /// + // Maybe resize swap chain + RECT client_rect; + bool ok = GetClientRect(window._os_handle, &client_rect); + assert(ok, "GetClientRect failed with error code %lu", GetLastError()); + u32 window_width = client_rect.right-client_rect.left; + u32 window_height = client_rect.bottom-client_rect.top; + if (window_width != d3d11_swap_chain_width || window_height != d3d11_swap_chain_height) { + d3d11_update_swapchain(); + } + + /// + // Maybe grow quad vbo + u32 required_size = sizeof(D3D11_Vertex) * draw_frame.num_blocks*QUADS_PER_BLOCK*6; + if (required_size > d3d11_quad_vbo_size) { + if (d3d11_quad_vbo) { + D3D11Release(d3d11_quad_vbo); + } + D3D11_BUFFER_DESC desc = ZERO(D3D11_BUFFER_DESC); + desc.Usage = D3D11_USAGE_DYNAMIC; + desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE; + desc.ByteWidth = required_size; + desc.BindFlags = D3D11_BIND_VERTEX_BUFFER; + HRESULT hr = VTABLE(CreateBuffer, d3d11_device, &desc, 0, &d3d11_quad_vbo); + assert(SUCCEEDED(hr), "CreateBuffer failed"); + d3d11_quad_vbo_size = required_size; + + log_verbose("Grew quad vbo to %d bytes.", d3d11_quad_vbo_size); + } + + if (draw_frame.num_blocks > 0) { + /// + // Render geometry from into vbo quad list + D3D11_MAPPED_SUBRESOURCE buffer_mapping; + VTABLE(Map, d3d11_context, (ID3D11Resource*)d3d11_quad_vbo, 0, D3D11_MAP_WRITE_DISCARD, 0, &buffer_mapping); + + ID3D11ShaderResourceView *textures[32]; + ID3D11ShaderResourceView *last_texture = 0; + u64 num_textures = 0; + + D3D11_Vertex* head = buffer_mapping.pData; + D3D11_Vertex* pointer = head; + u64 number_of_rendered_quads = 0; + Draw_Quad_Block *block = &draw_frame.first_block; + while (block != 0) { + + for (u64 i = 0; i < block->num_quads; i++) { + Draw_Quad *q = &block->quad_buffer[i]; + + int texture_index = -1; + + if (q->image) { + if (!q->image->gfx_handle) { + D3D11_TEXTURE2D_DESC desc = ZERO(D3D11_TEXTURE2D_DESC); + desc.Width = q->image->width; + desc.Height = q->image->height; + desc.MipLevels = 1; + desc.ArraySize = 1; + desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM; + desc.SampleDesc.Count = 1; + desc.SampleDesc.Quality = 0; + desc.Usage = D3D11_USAGE_DEFAULT; + desc.BindFlags = D3D11_BIND_SHADER_RESOURCE; + desc.CPUAccessFlags = 0; + desc.MiscFlags = 0; + + D3D11_SUBRESOURCE_DATA data = ZERO(D3D11_SUBRESOURCE_DATA); + data.pSysMem = q->image->data; + data.SysMemPitch = q->image->width * 4; // #Magicvalue assuming 4 channels + + ID3D11Texture2D* texture = 0; + HRESULT hr = VTABLE(CreateTexture2D, d3d11_device, &desc, &data, &texture); + win32_check_hr(hr); + + hr = VTABLE(CreateShaderResourceView, d3d11_device, (ID3D11Resource*)texture, 0, &q->image->gfx_handle); + win32_check_hr(hr); + + log_verbose("Created an image of width %d and height %d.", q->image->width, q->image->height); + } + + if (last_texture == q->image->gfx_handle) { + texture_index = (int)(num_textures-1); + } else { + // First look if texture is already bound + for (u64 j = 0; j < num_textures; j++) { + if (textures[j] == q->image->gfx_handle) { + texture_index = (int)j; + break; + } + } + // Otherwise use a new slot + if (texture_index <= -1) { + if (num_textures >= 32) { + // If max textures reached, make a draw call and start over + d3d11_draw_call(number_of_rendered_quads, textures, num_textures); + num_textures = 0; + texture_index = 0; + number_of_rendered_quads = 0; + pointer = head; + } else { + texture_index = (int)num_textures; + num_textures += 1; + } + } + } + textures[texture_index] = q->image->gfx_handle; + last_texture = q->image->gfx_handle; + } + + // We will write to 6 vertices for the one quad (two tris) + D3D11_Vertex* BL = pointer + 0; + D3D11_Vertex* TL = pointer + 1; + D3D11_Vertex* TR = pointer + 2; + D3D11_Vertex* BL2 = pointer + 3; + D3D11_Vertex* TR2 = pointer + 4; + D3D11_Vertex* BR = pointer + 5; + pointer += 6; + + BL->position = v4(q->bottom_left.x, q->bottom_left.y, 0, 1); + TL->position = v4(q->top_left.x, q->top_left.y, 0, 1); + TR->position = v4(q->top_right.x, q->top_right.y, 0, 1); + BR->position = v4(q->bottom_right.x, q->bottom_right.y, 0, 1); + + BL->uv = v2(q->uv.x1, q->uv.y1); + TL->uv = v2(q->uv.x1, q->uv.y2); + TR->uv = v2(q->uv.x2, q->uv.y2); + BR->uv = v2(q->uv.x2, q->uv.y1); + + BL->color = TL->color = TR->color = BR->color = q->color; + + BL->texture_index=TL->texture_index=TR->texture_index=BR->texture_index = texture_index; + + *BL2 = *BL; + *TR2 = *TR; + + number_of_rendered_quads += 1; + } + + block = block->next; + } + + VTABLE(Unmap, d3d11_context, (ID3D11Resource*)d3d11_quad_vbo, 0); + + /// + // Draw call + + d3d11_draw_call(number_of_rendered_quads, textures, num_textures); + } + + f64 rest_after = os_get_current_time_in_seconds(); + if (is_key_just_pressed('E')) + log("The rest took %.2fms", (rest_after-rest_before)*1000.0); + + f64 before_present = os_get_current_time_in_seconds(); + hr = VTABLE(Present, d3d11_swap_chain, gfx._can_vsync && gfx.enable_vsync, 0); + f64 after = os_get_current_time_in_seconds(); + if (is_key_just_pressed('E')) + log("Present took %.2fms", (after-before_present)*1000.0); + win32_check_hr(hr); + + reset_draw_frame(&draw_frame); +} diff --git a/oogabooga/gfx_impl_legacy_opengl.c b/oogabooga/gfx_impl_legacy_opengl.c index cf76182..ae047b6 100644 --- a/oogabooga/gfx_impl_legacy_opengl.c +++ b/oogabooga/gfx_impl_legacy_opengl.c @@ -7,6 +7,8 @@ HDC hdc; typedef BOOL (APIENTRY *PFNWGLSWAPINTERVALEXTPROC) (int interval); +const Gfx_Handle GFX_INVALID_HANDLE = 0; + void gfx_init() { // #Temporary #Cleanup // #Temporary #Cleanup @@ -56,11 +58,13 @@ void gfx_update() { for (u64 i = 0; i < block->num_quads; i++) { Draw_Quad q = block->quad_buffer[i]; - glColor4f(q.color.r, q.color.g, q.color.b, q.color.a); + + glColor4f(v4_expand(q.color)); glVertex2f(v2_expand(q.bottom_left)); glVertex2f(v2_expand(q.top_left)); glVertex2f(v2_expand(q.top_right)); glVertex2f(v2_expand(q.bottom_right)); + } block = block->next; diff --git a/oogabooga/gfx_interface.c b/oogabooga/gfx_interface.c new file mode 100644 index 0000000..836644e --- /dev/null +++ b/oogabooga/gfx_interface.c @@ -0,0 +1,37 @@ +#if GFX_RENDERER == GFX_RENDERER_D3D11 + #include + #include + #include + #include + #include + #include + typedef ID3D11ShaderResourceView * Gfx_Handle; + +#elif GFX_RENDERER == GFX_RENDERER_VULKAN + #error "We only have a D3D11 renderer at the moment" +#elif GFX_RENDERER == GFX_RENDERER_METAL + #error "We only have a D3D11 renderer at the moment" +#else + #error "Unknown renderer GFX_RENDERER defined" +#endif + + +typedef struct Gfx_State { + + // config + bool enable_vsync; + + // readonly + bool _can_vsync; + +} Gfx_State; +Gfx_State gfx; + +forward_global const Gfx_Handle GFX_INVALID_HANDLE; + +typedef struct Gfx_Image { + u32 width, height; + u8 *data; + Gfx_Handle gfx_handle; +} Gfx_Image; + diff --git a/oogabooga/linmath.c b/oogabooga/linmath.c index e594faf..5708827 100644 --- a/oogabooga/linmath.c +++ b/oogabooga/linmath.c @@ -6,89 +6,345 @@ #define RAD_PER_DEG (PI64 / 180.0) #define DEG_PER_RAD (180.0 / PI64) -#define to_radians (degrees) (((float32)degrees)*(float32)RAD_PER_DEG) -#define to_degrees (radians) (((float32)radians)*(float32)DEG_PER_RAD) +#define to_radians (degrees) (((float)degrees)*(float)RAD_PER_DEG) +#define to_degrees (radians) (((float)radians)*(float)DEG_PER_RAD) #define to_radians64(degrees) (((float64)degrees)*(float64)RAD_PER_DEG) #define to_degrees64(radians) (((float64)radians)*(float64)DEG_PER_RAD) #define to_radians32 to_radians #define to_degrees32 to_degrees -typedef struct Vector2 { - union {float32 x, r;}; - union {float32 y, g;}; +typedef union Vector2 { + struct {float x, y;}; } Vector2; -inline Vector2 v2(float32 x, float32 y) { return (Vector2){x, y}; } +inline Vector2 v2(float x, float y) { return (Vector2){x, y}; } #define v2_expand(v) (v).x, (v).y -typedef struct Vector3 { - union {float32 x, r;}; - union {float32 y, g;}; - union {float32 z, b;}; +typedef union Vector3 { + struct {float x, y, z;}; + struct {float r, g, b;}; + struct {Vector2 xy;}; + struct {float _x; Vector2 yz;}; } Vector3; -inline Vector3 v3(float32 x, float32 y, float32 z) { return (Vector3){x, y, z}; } +inline Vector3 v3(float x, float y, float z) { return (Vector3){x, y, z}; } #define v3_expand(v) (v).x, (v).y, (v).z -typedef struct Vector4 { - union {float32 x, r, left; }; - union {float32 y, g, bottom;}; - union {float32 z, b, right; }; - union {float32 w, a, top; }; +typedef union Vector4 { + struct {float x, y, z, w;}; + struct {float x1, y1, x2, y2;}; + struct {float r, g, b, a;}; + struct {float left, bottom, right, top;}; + struct {Vector2 xy; Vector2 zw;}; + struct {Vector3 xyz;}; + struct {float _x; Vector3 yzw;}; } Vector4; -inline Vector4 v4(float32 x, float32 y, float32 z, float32 w) { return (Vector4){x, y, z, w}; } +inline Vector4 v4(float x, float y, float z, float w) { return (Vector4){x, y, z, w}; } #define v4_expand(v) (v).x, (v).y, (v).z, (v).w // #Simd #Speed -Vector2 v2_add(Vector2 a, Vector2 b) { +inline Vector2 v2_add(Vector2 a, Vector2 b) { return v2(a.x + b.x, a.y + b.y); } -Vector3 v3_add(Vector3 a, Vector3 b) { +inline Vector3 v3_add(Vector3 a, Vector3 b) { return v3(a.x + b.x, a.y + b.y, a.z + b.z); } -Vector4 v4_add(Vector4 a, Vector4 b) { +inline Vector4 v4_add(Vector4 a, Vector4 b) { return v4(a.x + b.x, a.y + b.y, a.z + b.z, a.w + b.w); } -Vector2 v2_sub(Vector2 a, Vector2 b) { +inline Vector2 v2_sub(Vector2 a, Vector2 b) { return v2(a.x - b.x, a.y - b.y); } -Vector3 v3_sub(Vector3 a, Vector3 b) { +inline Vector3 v3_sub(Vector3 a, Vector3 b) { return v3(a.x - b.x, a.y - b.y, a.z - b.z); } -Vector4 v4_sub(Vector4 a, Vector4 b) { +inline Vector4 v4_sub(Vector4 a, Vector4 b) { return v4(a.x - b.x, a.y - b.y, a.z - b.z, a.w - b.w); } -Vector2 v2_mul(Vector2 a, Vector2 b) { +inline Vector2 v2_mul(Vector2 a, Vector2 b) { return v2(a.x * b.x, a.y * b.y); } -Vector3 v3_mul(Vector3 a, Vector3 b) { +inline Vector2 v2_mulf(Vector2 a, float b) { + return v2(a.x * b, a.y * b); +} +inline Vector3 v3_mul(Vector3 a, Vector3 b) { return v3(a.x * b.x, a.y * b.y, a.z * b.z); } -Vector4 v4_mul(Vector4 a, Vector4 b) { +inline Vector4 v4_mul(Vector4 a, Vector4 b) { return v4(a.x * b.x, a.y * b.y, a.z * b.z, a.w * b.w); } -Vector2 v2_div(Vector2 a, Vector2 b) { +inline Vector2 v2_div(Vector2 a, Vector2 b) { return v2(a.x / b.x, a.y / b.y); } -Vector3 v3_div(Vector3 a, Vector3 b) { +inline Vector3 v3_div(Vector3 a, Vector3 b) { return v3(a.x / b.x, a.y / b.y, a.z / b.z); } -Vector4 v4_div(Vector4 a, Vector4 b) { +inline Vector4 v4_div(Vector4 a, Vector4 b) { return v4(a.x / b.x, a.y / b.y, a.z / b.z, a.w / b.w); } -Vector2 v2_rotate_point_around_pivot(Vector2 point, Vector2 pivot, float32 rotation_radians) { - float32 s = sin(rotation_radians); - float32 c = cos(rotation_radians); +Vector2 v2_rotate_point_around_pivot(Vector2 point, Vector2 pivot, float rotation_radians) { + float s = sin(rotation_radians); + float c = cos(rotation_radians); point.x -= pivot.x; point.y -= pivot.y; - float32 x_new = point.x * c - point.y * s; - float32 y_new = point.x * s + point.y * c; + float x_new = point.x * c - point.y * s; + float y_new = point.x * s + point.y * c; point.x = x_new + pivot.x; point.y = y_new + pivot.y; return point; +} + + + + + + +typedef struct Matrix4 { + union {float m[4][4]; float data[16]; }; +} Matrix4; + +Matrix4 m4_scalar(float scalar) { + Matrix4 m; + for (int i = 0; i < 16; i++) { + m.data[i] = 0.0f; + } + m.data[0] = scalar; + m.data[5] = scalar; + m.data[10] = scalar; + m.data[15] = scalar; + return m; +} + +Matrix4 m4_make_translation(Vector3 translation) { + Matrix4 m = m4_scalar(1.0); + m.m[0][0] = 1.0f; m.m[1][1] = 1.0f; m.m[2][2] = 1.0f; m.m[3][3] = 1.0f; + m.m[0][3] = translation.x; + m.m[1][3] = translation.y; + m.m[2][3] = translation.z; + return m; +} + +Matrix4 m4_make_rotation(Vector3 axis, float radians) { + Matrix4 m = m4_scalar(1.0); + float c = cosf(radians); + float s = sinf(radians); + float t = 1.0f - c; + + m.m[0][0] = c + axis.x * axis.x * t; + m.m[0][1] = axis.x * axis.y * t + axis.z * s; + m.m[0][2] = axis.x * axis.z * t - axis.y * s; + + m.m[1][0] = axis.y * axis.x * t - axis.z * s; + m.m[1][1] = c + axis.y * axis.y * t; + m.m[1][2] = axis.y * axis.z * t + axis.x * s; + + m.m[2][0] = axis.z * axis.x * t + axis.y * s; + m.m[2][1] = axis.z * axis.y * t - axis.x * s; + m.m[2][2] = c + axis.z * axis.z * t; + + m.m[3][3] = 1.0f; + return m; +} + +inline Matrix4 m4_make_rotation_z(float radians) { + return m4_make_rotation(v3(0, 0, 1), radians); +} + +Matrix4 m4_make_scale(Vector3 scale) { + Matrix4 m = m4_scalar(1.0); + m.m[0][0] = scale.x; + m.m[1][1] = scale.y; + m.m[2][2] = scale.z; + m.m[3][3] = 1.0f; + return m; +} + +Matrix4 m4_multiply(Matrix4 a, Matrix4 b) { + Matrix4 result; + for (int i = 0; i < 4; ++i) { + for (int j = 0; j < 4; ++j) { + result.m[i][j] = a.m[i][0] * b.m[0][j] + + a.m[i][1] * b.m[1][j] + + a.m[i][2] * b.m[2][j] + + a.m[i][3] * b.m[3][j]; + } + } + return result; +} + +inline Matrix4 m4_translate(Matrix4 m, Vector3 translation) { + Matrix4 translation_matrix = m4_make_translation(translation); + return m4_multiply(m, translation_matrix); +} + +inline Matrix4 m4_rotate(Matrix4 m, Vector3 axis, float radians) { + Matrix4 rotation_matrix = m4_make_rotation(axis, radians); + return m4_multiply(m, rotation_matrix); +} +inline Matrix4 m4_rotate_z(Matrix4 m, float radians) { + Matrix4 rotation_matrix = m4_make_rotation(v3(0, 0, 1), radians); + return m4_multiply(m, rotation_matrix); +} + +inline Matrix4 m4_scale(Matrix4 m, Vector3 scale) { + Matrix4 scale_matrix = m4_make_scale(scale); + return m4_multiply(m, scale_matrix); +} + + +Matrix4 m4_make_orthographic_projection(float left, float right, float bottom, float top, float near, float far) { + Matrix4 m = m4_scalar(1.0f); + m.m[0][0] = 2.0f / (right - left); + m.m[1][1] = 2.0f / (top - bottom); + m.m[2][2] = -2.0f / (far - near); + m.m[0][3] = -(right + left) / (right - left); + m.m[1][3] = -(top + bottom) / (top - bottom); + m.m[2][3] = -(far + near) / (far - near); + m.m[3][3] = 1.0f; + return m; +} + +Vector4 m4_transform(Matrix4 m, Vector4 v) { + Vector4 result; + result.x = m.m[0][0] * v.x + m.m[0][1] * v.y + m.m[0][2] * v.z + m.m[0][3] * v.w; + result.y = m.m[1][0] * v.x + m.m[1][1] * v.y + m.m[1][2] * v.z + m.m[1][3] * v.w; + result.z = m.m[2][0] * v.x + m.m[2][1] * v.y + m.m[2][2] * v.z + m.m[2][3] * v.w; + result.w = m.m[3][0] * v.x + m.m[3][1] * v.y + m.m[3][2] * v.z + m.m[3][3] * v.w; + return result; +} +Matrix4 m4_inverse(Matrix4 m) { + Matrix4 inv; + float det; + + inv.m[0][0] = m.m[1][1] * m.m[2][2] * m.m[3][3] - + m.m[1][1] * m.m[2][3] * m.m[3][2] - + m.m[2][1] * m.m[1][2] * m.m[3][3] + + m.m[2][1] * m.m[1][3] * m.m[3][2] + + m.m[3][1] * m.m[1][2] * m.m[2][3] - + m.m[3][1] * m.m[1][3] * m.m[2][2]; + + inv.m[1][0] = -m.m[1][0] * m.m[2][2] * m.m[3][3] + + m.m[1][0] * m.m[2][3] * m.m[3][2] + + m.m[2][0] * m.m[1][2] * m.m[3][3] - + m.m[2][0] * m.m[1][3] * m.m[3][2] - + m.m[3][0] * m.m[1][2] * m.m[2][3] + + m.m[3][0] * m.m[1][3] * m.m[2][2]; + + inv.m[2][0] = m.m[1][0] * m.m[2][1] * m.m[3][3] - + m.m[1][0] * m.m[2][3] * m.m[3][1] - + m.m[2][0] * m.m[1][1] * m.m[3][3] + + m.m[2][0] * m.m[1][3] * m.m[3][1] + + m.m[3][0] * m.m[1][1] * m.m[2][3] - + m.m[3][0] * m.m[1][3] * m.m[2][1]; + + inv.m[3][0] = -m.m[1][0] * m.m[2][1] * m.m[3][2] + + m.m[1][0] * m.m[2][2] * m.m[3][1] + + m.m[2][0] * m.m[1][1] * m.m[3][2] - + m.m[2][0] * m.m[1][2] * m.m[3][1] - + m.m[3][0] * m.m[1][1] * m.m[2][2] + + m.m[3][0] * m.m[1][2] * m.m[2][1]; + + inv.m[0][1] = -m.m[0][1] * m.m[2][2] * m.m[3][3] + + m.m[0][1] * m.m[2][3] * m.m[3][2] + + m.m[2][1] * m.m[0][2] * m.m[3][3] - + m.m[2][1] * m.m[0][3] * m.m[3][2] - + m.m[3][1] * m.m[0][2] * m.m[2][3] + + m.m[3][1] * m.m[0][3] * m.m[2][2]; + + inv.m[1][1] = m.m[0][0] * m.m[2][2] * m.m[3][3] - + m.m[0][0] * m.m[2][3] * m.m[3][2] - + m.m[2][0] * m.m[0][2] * m.m[3][3] + + m.m[2][0] * m.m[0][3] * m.m[3][2] + + m.m[3][0] * m.m[0][2] * m.m[2][3] - + m.m[3][0] * m.m[0][3] * m.m[2][2]; + + inv.m[2][1] = -m.m[0][0] * m.m[2][1] * m.m[3][3] + + m.m[0][0] * m.m[2][3] * m.m[3][1] + + m.m[2][0] * m.m[0][1] * m.m[3][3] - + m.m[2][0] * m.m[0][3] * m.m[3][1] - + m.m[3][0] * m.m[0][1] * m.m[2][3] + + m.m[3][0] * m.m[0][3] * m.m[2][1]; + + inv.m[3][1] = m.m[0][0] * m.m[2][1] * m.m[3][2] - + m.m[0][0] * m.m[2][2] * m.m[3][1] - + m.m[2][0] * m.m[0][1] * m.m[3][2] + + m.m[2][0] * m.m[0][2] * m.m[3][1] + + m.m[3][0] * m.m[0][1] * m.m[2][2] - + m.m[3][0] * m.m[0][2] * m.m[2][1]; + + inv.m[0][2] = m.m[0][1] * m.m[1][2] * m.m[3][3] - + m.m[0][1] * m.m[1][3] * m.m[3][2] - + m.m[1][1] * m.m[0][2] * m.m[3][3] + + m.m[1][1] * m.m[0][3] * m.m[3][2] + + m.m[3][1] * m.m[0][2] * m.m[1][3] - + m.m[3][1] * m.m[0][3] * m.m[1][2]; + + inv.m[1][2] = -m.m[0][0] * m.m[1][2] * m.m[3][3] + + m.m[0][0] * m.m[1][3] * m.m[3][2] + + m.m[1][0] * m.m[0][2] * m.m[3][3] - + m.m[1][0] * m.m[0][3] * m.m[3][2] - + m.m[3][0] * m.m[0][2] * m.m[1][3] + + m.m[3][0] * m.m[0][3] * m.m[1][2]; + + inv.m[2][2] = m.m[0][0] * m.m[1][1] * m.m[3][3] - + m.m[0][0] * m.m[1][3] * m.m[3][1] - + m.m[1][0] * m.m[0][1] * m.m[3][3] + + m.m[1][0] * m.m[0][3] * m.m[3][1] + + m.m[3][0] * m.m[0][1] * m.m[1][3] - + m.m[3][0] * m.m[0][3] * m.m[1][1]; + + inv.m[3][2] = -m.m[0][0] * m.m[1][1] * m.m[3][2] + + m.m[0][0] * m.m[1][2] * m.m[3][1] + + m.m[1][0] * m.m[0][1] * m.m[3][2] - + m.m[1][0] * m.m[0][2] * m.m[3][1] - + m.m[3][0] * m.m[0][1] * m.m[1][2] + + m.m[3][0] * m.m[0][2] * m.m[1][1]; + + inv.m[0][3] = -m.m[0][1] * m.m[1][2] * m.m[2][3] + + m.m[0][1] * m.m[1][3] * m.m[2][2] + + m.m[1][1] * m.m[0][2] * m.m[2][3] - + m.m[1][1] * m.m[0][3] * m.m[2][2] - + m.m[2][1] * m.m[0][2] * m.m[1][3] + + m.m[2][1] * m.m[0][3] * m.m[1][2]; + + inv.m[1][3] = m.m[0][0] * m.m[1][2] * m.m[2][3] - + m.m[0][0] * m.m[1][3] * m.m[2][2] - + m.m[1][0] * m.m[0][2] * m.m[2][3] + + m.m[1][0] * m.m[0][3] * m.m[2][2] + + m.m[2][0] * m.m[0][2] * m.m[1][3] - + m.m[2][0] * m.m[0][3] * m.m[1][2]; + + inv.m[2][3] = -m.m[0][0] * m.m[1][1] * m.m[2][3] + + m.m[0][0] * m.m[1][3] * m.m[2][1] + + m.m[1][0] * m.m[0][1] * m.m[2][3] - + m.m[1][0] * m.m[0][3] * m.m[2][1] - + m.m[2][0] * m.m[0][1] * m.m[1][3] + + m.m[2][0] * m.m[0][3] * m.m[1][1]; + + inv.m[3][3] = m.m[0][0] * m.m[1][1] * m.m[2][2] - + m.m[0][0] * m.m[1][2] * m.m[2][1] - + m.m[1][0] * m.m[0][1] * m.m[2][2] + + m.m[1][0] * m.m[0][2] * m.m[2][1] + + m.m[2][0] * m.m[0][1] * m.m[1][2] - + m.m[2][0] * m.m[0][2] * m.m[1][1]; + + det = m.m[0][0] * inv.m[0][0] + m.m[0][1] * inv.m[1][0] + m.m[0][2] * inv.m[2][0] + m.m[0][3] * inv.m[3][0]; + + if (det == 0) + return m4_scalar(0); + + det = 1.0f / det; + + for (int i = 0; i < 4; i++) { + for (int j = 0; j < 4; j++) { + inv.m[i][j] *= det; + } + } + + return inv; } \ No newline at end of file diff --git a/oogabooga/memory.c b/oogabooga/memory.c index a99bfb1..c66ba72 100644 --- a/oogabooga/memory.c +++ b/oogabooga/memory.c @@ -383,11 +383,14 @@ void* heap_allocator_proc(u64 size, void *p, Allocator_Message message) { break; } case ALLOCATOR_DEALLOCATE: { - assert(is_pointer_valid(p), "Invalid pointer passed to heap allocator deallocate"); + assert(is_pointer_valid(p), "Invalid pointer passed to heap allocator deallocate"); heap_dealloc(p); return 0; } case ALLOCATOR_REALLOCATE: { + if (!p) { + return heap_alloc(size); + } assert(is_pointer_valid(p), "Invalid pointer passed to heap allocator reallocate"); Heap_Allocation_Metadata *meta = (Heap_Allocation_Metadata*)((u64)p)-sizeof(Heap_Allocation_Metadata); void *new = heap_alloc(size); @@ -399,6 +402,15 @@ void* heap_allocator_proc(u64 size, void *p, Allocator_Message message) { return 0; } +Allocator get_heap_allocator() { + Allocator heap_allocator; + + heap_allocator.proc = heap_allocator_proc; + heap_allocator.data = 0; + + return heap_allocator; +} + /// /// // Temporary storage diff --git a/oogabooga/oogabooga.c b/oogabooga/oogabooga.c index 7ed3c0b..c9bc411 100644 --- a/oogabooga/oogabooga.c +++ b/oogabooga/oogabooga.c @@ -37,13 +37,40 @@ void* lodepng_malloc(size_t size) { return context.allocator.proc((u64)size, 0, ALLOCATOR_ALLOCATE); } void* lodepng_realloc(void* ptr, size_t new_size) { - return context.allocator.proc((u64)new_size, 0, ALLOCATOR_REALLOCATE); + return context.allocator.proc((u64)new_size, ptr, ALLOCATOR_REALLOCATE); } void lodepng_free(void* ptr) { + if (!ptr) return; context.allocator.proc(0, ptr, ALLOCATOR_DEALLOCATE); } #define LODEPNG_NO_COMPILE_ALLOCATORS +//#define LODEPNG_NO_COMPILE_ANCILLARY_CHUNKS +#define LODEPNG_NO_COMPILE_DISK +#define LODEPNG_NO_COMPILE_ERROR_TEXT +#define LODEPNG_NO_COMPILE_ENCODER +// One day I might write my own png decoder so we don't even need this +#include "third_party/lodepng.h" #include "third_party/lodepng.c" +/* + To decode a png file: + + // 1. Read to memory + string path = fixed_string("my_image.png"); + string png; + os_read_entire_file(path, &png); + + // 2. Decode + u8 *image; + u32 width; + u32 height; + u32 error = lodepng_decode32(&image, &width, &height, png.data, png.count); + + // Cleanup + dealloc_string(png); + dealloc(image); +*/ + + ///// @@ -52,14 +79,17 @@ void lodepng_free(void* ptr) { #ifdef _WIN32 #include #define TARGET_OS WINDOWS + #define OS_PATHS_HAVE_BACKSLASH 1 #elif defined(__linux__) // Include whatever #Incomplete #Portability #define TARGET_OS LINUX #error "Linux is not supported yet"; + #define OS_PATHS_HAVE_BACKSLASH 0 #elif defined(__APPLE__) && defined(__MACH__) // Include whatever #Incomplete #Portability #define TARGET_OS MACOS #error "Mac is not supported yet"; + #define OS_PATHS_HAVE_BACKSLASH 1 #else #error "Current OS not supported!"; #endif @@ -67,11 +97,6 @@ void lodepng_free(void* ptr) { #define GFX_RENDERER_D3D11 0 #define GFX_RENDERER_VULKAN 1 #define GFX_RENDERER_METAL 2 -#define GFX_RENDERER_LEGACY_OPENGL 3 // #Temporary #Cleanup - -// #Temporary #Cleanup -#undef GFX_RENDERER -#define GFX_RENDERER GFX_RENDERER_LEGACY_OPENGL #ifndef GFX_RENDERER // #Portability @@ -88,8 +113,18 @@ void lodepng_free(void* ptr) { #include "string.c" #include "unicode.c" #include "string_format.c" +#include "path_utils.c" #include "os_interface.c" +#include "gfx_interface.c" + +// I hope whoever caused this @ microsoft is fired. +#ifdef near +#undef near +#endif +#ifdef far +#undef far +#endif #include "random.c" @@ -110,7 +145,7 @@ void lodepng_free(void* ptr) { #elif GFX_RENDERER == GFX_RENDERER_LEGACY_OPENGL #include "gfx_impl_legacy_opengl.c" #else - #error "Unknown renderer defined in GFX_RENDERER" + #error "Unknown renderer GFX_RENDERER defined" #endif #if TARGET_OS == WINDOWS @@ -125,6 +160,7 @@ void lodepng_free(void* ptr) { void oogabooga_init(u64 program_memory_size) { + context.logger = default_logger; os_init(program_memory_size); gfx_init(); heap_init(); @@ -156,4 +192,5 @@ int main(int argc, char **argv) { printf("Ooga booga program exit with code %i\n", code); return code; -} \ No newline at end of file +} + diff --git a/oogabooga/os_impl_windows.c b/oogabooga/os_impl_windows.c index 05720b1..b845189 100644 --- a/oogabooga/os_impl_windows.c +++ b/oogabooga/os_impl_windows.c @@ -160,13 +160,9 @@ void os_init(u64 program_memory_size) { program_memory_mutex = os_make_mutex(); os_grow_program_memory(program_memory_size); - Allocator heap_allocator; - - heap_allocator.proc = heap_allocator_proc; - heap_allocator.data = 0; heap_init(); - context.allocator = heap_allocator; + context.allocator = get_heap_allocator(); os.crt = os_load_dynamic_library(const_string("msvcrt.dll")); assert(os.crt != 0, "Could not load win32 crt library. Might be compiled with non-msvc? #Incomplete #Portability"); @@ -255,9 +251,6 @@ bool os_grow_program_memory(u64 new_size) { u64 aligned_size = (new_size+os.granularity) & ~(os.granularity); void* aligned_base = (void*)(((u64)VIRTUAL_MEMORY_BASE+os.granularity) & ~(os.granularity-1)); - u64 m = aligned_size & os.granularity; - assert(m == 0); - program_memory = VirtualAlloc(aligned_base, aligned_size, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); if (program_memory == 0) { os_unlock_mutex(program_memory_mutex); // #Sync @@ -519,6 +512,31 @@ u16 *temp_win32_fixed_utf8_to_null_terminated_wide(string utf8) { pop_allocator(); return result; } +string win32_null_terminated_wide_to_fixed_utf8(const u16 *utf16) { + u64 utf8_length = WideCharToMultiByte(CP_UTF8, 0, (LPCWCH)utf16, -1, 0, 0, 0, 0); + + u8 *utf8_str = (u8 *)alloc(utf8_length * sizeof(u8)); + + int result = WideCharToMultiByte(CP_UTF8, 0, (LPCWCH)utf16, -1, (LPSTR)utf8_str, (int)utf8_length, 0, 0); + if (result == 0) { + dealloc(utf8_str); + return (string){0, 0}; + } + + string utf8; + utf8.data = utf8_str; + utf8.count = utf8_length-1; + + return utf8; +} + +string temp_win32_null_terminated_wide_to_fixed_utf8(const u16 *utf16) { + push_temp_allocator(); + string result = win32_null_terminated_wide_to_fixed_utf8(utf16); + pop_allocator(); + return result; +} + File os_file_open(string path, Os_Io_Open_Flags flags) { DWORD access = GENERIC_READ; @@ -587,14 +605,19 @@ bool os_read_entire_file_handle(File f, string *result) { if (!GetFileSizeEx(f, &file_size)) { return false; } - + + u64 actual_read = 0; result->data = (u8*)alloc(file_size.QuadPart); - if (!result->data) { - return false; - } - result->count = file_size.QuadPart; - return os_file_read(f, result->data, file_size.QuadPart, NULL); + + bool ok = os_file_read(f, result->data, file_size.QuadPart, &actual_read); + if (!ok) { + dealloc(result->data); + result->data = 0; + return false; + } + + return actual_read == file_size.QuadPart; } bool os_read_entire_file(string path, string *result) { @@ -607,6 +630,38 @@ bool os_read_entire_file(string path, string *result) { return res; } +bool os_is_file(string path) { + u16 *path_wide = temp_win32_fixed_utf8_to_null_terminated_wide(path); + assert(path_wide, "Invalid path string"); + if (path_wide == NULL) { + return false; + } + + DWORD attributes = GetFileAttributesW(path_wide); + + if (attributes == INVALID_FILE_ATTRIBUTES) { + return false; + } + + return !(attributes & FILE_ATTRIBUTE_DIRECTORY); +} + +bool os_is_directory(string path) { + u16 *path_wide = temp_win32_fixed_utf8_to_null_terminated_wide(path); + assert(path_wide, "Invalid path string"); + if (path_wide == NULL) { + return false; + } + + DWORD attributes = GetFileAttributesW(path_wide); + + if (attributes == INVALID_FILE_ATTRIBUTES) { + return false; + } + + return (attributes & FILE_ATTRIBUTE_DIRECTORY); +} + void fprints(File f, string fmt, ...) { va_list args; va_start(args, fmt); @@ -623,6 +678,10 @@ void fprintf(File f, const char* fmt, ...) { va_end(args); } + + + + /// /// // Memory diff --git a/oogabooga/os_interface.c b/oogabooga/os_interface.c index d932a32..2ae80e8 100644 --- a/oogabooga/os_interface.c +++ b/oogabooga/os_interface.c @@ -213,6 +213,9 @@ bool os_write_entire_file(string path, string data); bool os_read_entire_file_handle(File f, string *result); bool os_read_entire_file(string path, string *result); +bool os_is_file(string path); +bool os_is_directory(string path); + void fprints(File f, string fmt, ...); void fprintf(File f, const char* fmt, ...); diff --git a/oogabooga/path_utils.c b/oogabooga/path_utils.c new file mode 100644 index 0000000..6a27674 --- /dev/null +++ b/oogabooga/path_utils.c @@ -0,0 +1,22 @@ + +// in "dir/file.ext" this returns "ext". Returns an empty string if there is no extension +string get_file_extension(string path) { + + if (path.count <= 0) return ZERO(string); + + for (s64 i = path.count-1; i >= 0; i--) { + + if (path.data[i] == '/' || path.data[i] == '\\' || path.data[i] == ':') { + return ZERO(string); + } + + if (path.data[i] == '.') { + string ext = ZERO(string); + ext.count = path.count-i; + if (ext.count > 0) ext.data = path.data+i; + return ext; + } + } + + return ZERO(string); +} \ No newline at end of file diff --git a/oogabooga/string.c b/oogabooga/string.c index bcb19a8..7e0f0ec 100644 --- a/oogabooga/string.c +++ b/oogabooga/string.c @@ -51,9 +51,10 @@ typedef struct string { void push_temp_allocator(); // Not sure what to call this lol +#define fxstr fixed_string #define fixed_string const_string #define cstr const_string -#define const_string(s) ((string){ length_of_null_terminated_string(s), (u8*)s }) +#define const_string(s) ((string){ length_of_null_terminated_string((const char*)s), (u8*)s }) inline u64 length_of_null_terminated_string(const char* cstring) { u64 len = 0; @@ -124,3 +125,24 @@ string string_view(string s, u64 start_index, u64 count) { return result; } +// Returns first index from left where "sub" matches in "s". Returns -1 if no match is found. +s64 string_find_from_left(string s, string sub) { + for (s64 i = 0; i <= s.count-sub.count; i++) { + if (strings_match(string_view(s, i, sub.count), sub)) { + return i; + } + } + + return -1; +} + +// Returns first index from right where "sub" matches in "s" Returns -1 if no match is found. +s64 string_find_from_right(string s, string sub) { + for (s64 i = s.count-sub.count; i >= 0 ; i--) { + if (strings_match(string_view(s, i, sub.count), sub)) { + return i; + } + } + + return -1; +} \ No newline at end of file diff --git a/oogabooga/string_format.c b/oogabooga/string_format.c index a8c4410..3d8fd9f 100644 --- a/oogabooga/string_format.c +++ b/oogabooga/string_format.c @@ -24,17 +24,16 @@ u64 format_string_to_buffer(char* buffer, u64 count, const char* fmt, va_list ar // We extend the standard formatting and add %cs so we can format c strings if we need to p += 2; char* s = va_arg(args, char*); - assert(is_pointer_valid(s), "You passed an invalid pointer to %%cs"); u64 len = 0; while (*s != '\0' && (bufp - buffer) < count - 1) { - assert(is_pointer_valid(s) && len < (1024ULL*1024ULL*1024ULL*1ULL), "The argument passed to %%cs is either way too big, missing null-termination or simply not a char*."); + assert(len < (1024ULL*1024ULL*1024ULL*1ULL), "The argument passed to %%cs is either way too big, missing null-termination or simply not a char*."); if (buffer) { *bufp = *s; } s += 1; bufp += 1; len += 1; - assert(is_pointer_valid(s) && len < (1024ULL*1024ULL*1024ULL*1ULL), "The argument passed to %%cs is either way too big, missing null-termination or simply not a char*."); + assert(len < (1024ULL*1024ULL*1024ULL*1ULL), "The argument passed to %%cs is either way too big, missing null-termination or simply not a char*."); } } else { // Fallback to standard vsnprintf @@ -222,3 +221,25 @@ void printf(const char* fmt, ...) { va_end(args); } + + + +typedef void(*Logger_Proc)(Log_Level level, string s); +#define LOG_BASE(level, ...) If context.logger then ((Logger_Proc)context.logger)(level, tprint(__VA_ARGS__)) + + +#define log_verbose(...) LOG_BASE(LOG_VERBOSE, __VA_ARGS__) +#define log_info(...) LOG_BASE(LOG_INFO, __VA_ARGS__) +#define log_warning(...) LOG_BASE(LOG_WARNING, __VA_ARGS__) +#define log_error(...) LOG_BASE(LOG_ERROR, __VA_ARGS__) + +#define log(...) LOG_BASE(LOG_INFO, __VA_ARGS__) + +void default_logger(Log_Level level, string s) { + switch (level) { + case LOG_VERBOSE: print("[VERBOSE]: %s\n", s); break; + case LOG_INFO: print("[INFO]: %s\n", s); break; + case LOG_WARNING: print("[WARNING]: %s\n", s); break; + case LOG_ERROR: print("[ERROR]: %s\n", s); break; + } +} \ No newline at end of file diff --git a/oogabooga/tests.c b/oogabooga/tests.c index 06bd98c..ae1f7ab 100644 --- a/oogabooga/tests.c +++ b/oogabooga/tests.c @@ -407,6 +407,23 @@ void test_file_io() { read_entire_result = os_read_entire_file(fixed_string("balls.txt"), &hello_balls); assert(read_entire_result, "Failed: could not read balls.txt"); assert(strings_match(hello_balls, fixed_string("Hello, Balls!")), "Failed: balls read/write mismatch. Expected 'Hello, Balls!', got '%s'", hello_balls); + + u64 integers[4096]; + for (u64 i = 0; i < 4096; i++) { + integers[i] = get_random(); + } + string integers_data; + integers_data.data = (u8*)integers; + integers_data.count = 4096*sizeof(u64); + bool ok = os_write_entire_file(fxstr("integers"), integers_data); + assert(ok, "write integers fail"); + + string integers_read; + ok = os_read_entire_file(fxstr("integers"), &integers_read); + assert(ok, "read integers fail"); + u64 *new_integers = (u64*)integers_data.data; + assert(integers_read.count == integers_data.count, "Failed: big file read/write mismatch. Read was %d and written was %d", integers_read.count, integers_data.count); + assert(strings_match(integers_data, integers_read), "Failed: big file read/write mismatch"); // Clean up test files bool delete_ok = false; diff --git a/oogabooga/third_party/lodepng.c b/oogabooga/third_party/lodepng.c index e2086a2..52fbd5d 100644 --- a/oogabooga/third_party/lodepng.c +++ b/oogabooga/third_party/lodepng.c @@ -28,16 +28,7 @@ The manual and changelog are in the header file "lodepng.h" Rename this file to lodepng.cpp to use it for C++, or to lodepng.c to use it for C. */ -/* - -MODIFICATION NOTICE: - -Commented out '#include "lodepng.h"' since we are not using the header. -- Charlie Malmqvist 2024-06-29 - -*/ - -//#include "lodepng.h" +#include "lodepng.h" #ifdef LODEPNG_COMPILE_DISK #include /* LONG_MAX */ @@ -312,7 +303,7 @@ static void string_cleanup(char** out) { } /*also appends null termination character*/ -static char* alloc_string_sized(const char* in, size_t insize) { +static char* lodepng_alloc_string_sized(const char* in, size_t insize) { char* out = (char*)lodepng_malloc(insize + 1); if(out) { lodepng_memcpy(out, in, insize); @@ -322,8 +313,8 @@ static char* alloc_string_sized(const char* in, size_t insize) { } /* dynamically allocates a new string with a copy of the null terminated input text */ -static char* alloc_string(const char* in) { - return alloc_string_sized(in, lodepng_strlen(in)); +static char* lodepng_alloc_string(const char* in) { + return lodepng_alloc_string_sized(in, lodepng_strlen(in)); } #endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ #endif /*LODEPNG_COMPILE_PNG*/ @@ -3188,8 +3179,8 @@ static unsigned lodepng_add_text_sized(LodePNGInfo* info, const char* key, const if(!new_keys || !new_strings) return 83; /*alloc fail*/ ++info->text_num; - info->text_keys[info->text_num - 1] = alloc_string(key); - info->text_strings[info->text_num - 1] = alloc_string_sized(str, size); + info->text_keys[info->text_num - 1] = lodepng_alloc_string(key); + info->text_strings[info->text_num - 1] = lodepng_alloc_string_sized(str, size); if(!info->text_keys[info->text_num - 1] || !info->text_strings[info->text_num - 1]) return 83; /*alloc fail*/ return 0; @@ -3261,10 +3252,10 @@ static unsigned lodepng_add_itext_sized(LodePNGInfo* info, const char* key, cons ++info->itext_num; - info->itext_keys[info->itext_num - 1] = alloc_string(key); - info->itext_langtags[info->itext_num - 1] = alloc_string(langtag); - info->itext_transkeys[info->itext_num - 1] = alloc_string(transkey); - info->itext_strings[info->itext_num - 1] = alloc_string_sized(str, size); + info->itext_keys[info->itext_num - 1] = lodepng_alloc_string(key); + info->itext_langtags[info->itext_num - 1] = lodepng_alloc_string(langtag); + info->itext_transkeys[info->itext_num - 1] = lodepng_alloc_string(transkey); + info->itext_strings[info->itext_num - 1] = lodepng_alloc_string_sized(str, size); return 0; } @@ -3278,7 +3269,7 @@ unsigned lodepng_add_itext(LodePNGInfo* info, const char* key, const char* langt static unsigned lodepng_assign_icc(LodePNGInfo* info, const char* name, const unsigned char* profile, unsigned profile_size) { if(profile_size == 0) return 100; /*invalid ICC profile size*/ - info->iccp_name = alloc_string(name); + info->iccp_name = lodepng_alloc_string(name); info->iccp_profile = (unsigned char*)lodepng_malloc(profile_size); if(!info->iccp_name || !info->iccp_profile) return 83; /*alloc fail*/ diff --git a/oogabooga/third_party/lodepng.h b/oogabooga/third_party/lodepng.h new file mode 100644 index 0000000..e8b5088 --- /dev/null +++ b/oogabooga/third_party/lodepng.h @@ -0,0 +1,2097 @@ +/* +LodePNG version 20230410 + +Copyright (c) 2005-2023 Lode Vandevenne + +This software is provided 'as-is', without any express or implied +warranty. In no event will the authors be held liable for any damages +arising from the use of this software. + +Permission is granted to anyone to use this software for any purpose, +including commercial applications, and to alter it and redistribute it +freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + + 3. This notice may not be removed or altered from any source + distribution. +*/ +/* +MODIFICATIONS: + - Comment out + - Rename alloc_string -> lodepng_alloc_string +*/ + +#ifndef LODEPNG_H +#define LODEPNG_H + +/* + !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! THIS IS MODIFIED by Charlie Malmqvist 2024-06-69 +*//////////////// | +//#include /*for size_t*/ // <-----------| + +extern const char* LODEPNG_VERSION_STRING; + +/* +The following #defines are used to create code sections. They can be disabled +to disable code sections, which can give faster compile time and smaller binary. +The "NO_COMPILE" defines are designed to be used to pass as defines to the +compiler command to disable them without modifying this header, e.g. +-DLODEPNG_NO_COMPILE_ZLIB for gcc or clang. +*/ +/*deflate & zlib. If disabled, you must specify alternative zlib functions in +the custom_zlib field of the compress and decompress settings*/ +#ifndef LODEPNG_NO_COMPILE_ZLIB +/*pass -DLODEPNG_NO_COMPILE_ZLIB to the compiler to disable this, or comment out LODEPNG_COMPILE_ZLIB below*/ +#define LODEPNG_COMPILE_ZLIB +#endif + +/*png encoder and png decoder*/ +#ifndef LODEPNG_NO_COMPILE_PNG +/*pass -DLODEPNG_NO_COMPILE_PNG to the compiler to disable this, or comment out LODEPNG_COMPILE_PNG below*/ +#define LODEPNG_COMPILE_PNG +#endif + +/*deflate&zlib decoder and png decoder*/ +#ifndef LODEPNG_NO_COMPILE_DECODER +/*pass -DLODEPNG_NO_COMPILE_DECODER to the compiler to disable this, or comment out LODEPNG_COMPILE_DECODER below*/ +#define LODEPNG_COMPILE_DECODER +#endif + +/*deflate&zlib encoder and png encoder*/ +#ifndef LODEPNG_NO_COMPILE_ENCODER +/*pass -DLODEPNG_NO_COMPILE_ENCODER to the compiler to disable this, or comment out LODEPNG_COMPILE_ENCODER below*/ +#define LODEPNG_COMPILE_ENCODER +#endif + +/*the optional built in harddisk file loading and saving functions*/ +#ifndef LODEPNG_NO_COMPILE_DISK +/*pass -DLODEPNG_NO_COMPILE_DISK to the compiler to disable this, or comment out LODEPNG_COMPILE_DISK below*/ +#define LODEPNG_COMPILE_DISK +#endif + +/*support for chunks other than IHDR, IDAT, PLTE, tRNS, IEND: ancillary and unknown chunks*/ +#ifndef LODEPNG_NO_COMPILE_ANCILLARY_CHUNKS +/*pass -DLODEPNG_NO_COMPILE_ANCILLARY_CHUNKS to the compiler to disable this, +or comment out LODEPNG_COMPILE_ANCILLARY_CHUNKS below*/ +#define LODEPNG_COMPILE_ANCILLARY_CHUNKS +#endif + +/*ability to convert error numerical codes to English text string*/ +#ifndef LODEPNG_NO_COMPILE_ERROR_TEXT +/*pass -DLODEPNG_NO_COMPILE_ERROR_TEXT to the compiler to disable this, +or comment out LODEPNG_COMPILE_ERROR_TEXT below*/ +#define LODEPNG_COMPILE_ERROR_TEXT +#endif + +/*Compile the default allocators (C's free, malloc and realloc). If you disable this, +you can define the functions lodepng_free, lodepng_malloc and lodepng_realloc in your +source files with custom allocators.*/ +#ifndef LODEPNG_NO_COMPILE_ALLOCATORS +/*pass -DLODEPNG_NO_COMPILE_ALLOCATORS to the compiler to disable the built-in ones, +or comment out LODEPNG_COMPILE_ALLOCATORS below*/ +#define LODEPNG_COMPILE_ALLOCATORS +#endif + +/*Disable built-in CRC function, in that case a custom implementation of +lodepng_crc32 must be defined externally so that it can be linked in. +The default built-in CRC code comes with 8KB of lookup tables, so for memory constrained environment you may want it +disabled and provide a much smaller implementation externally as said above. You can find such an example implementation +in a comment in the lodepng.c(pp) file in the 'else' case of the searchable LODEPNG_COMPILE_CRC section.*/ +#ifndef LODEPNG_NO_COMPILE_CRC +/*pass -DLODEPNG_NO_COMPILE_CRC to the compiler to disable the built-in one, +or comment out LODEPNG_COMPILE_CRC below*/ +#define LODEPNG_COMPILE_CRC +#endif + +/*compile the C++ version (you can disable the C++ wrapper here even when compiling for C++)*/ +#ifdef __cplusplus +#ifndef LODEPNG_NO_COMPILE_CPP +/*pass -DLODEPNG_NO_COMPILE_CPP to the compiler to disable C++ (not needed if a C-only compiler), +or comment out LODEPNG_COMPILE_CPP below*/ +#define LODEPNG_COMPILE_CPP +#endif +#endif + +#ifdef LODEPNG_COMPILE_CPP +#include +#include +#endif /*LODEPNG_COMPILE_CPP*/ + +#ifdef LODEPNG_COMPILE_PNG +/*The PNG color types (also used for raw image).*/ +typedef enum LodePNGColorType { + LCT_GREY = 0, /*grayscale: 1,2,4,8,16 bit*/ + LCT_RGB = 2, /*RGB: 8,16 bit*/ + LCT_PALETTE = 3, /*palette: 1,2,4,8 bit*/ + LCT_GREY_ALPHA = 4, /*grayscale with alpha: 8,16 bit*/ + LCT_RGBA = 6, /*RGB with alpha: 8,16 bit*/ + /*LCT_MAX_OCTET_VALUE lets the compiler allow this enum to represent any invalid + byte value from 0 to 255 that could be present in an invalid PNG file header. Do + not use, compare with or set the name LCT_MAX_OCTET_VALUE, instead either use + the valid color type names above, or numeric values like 1 or 7 when checking for + particular disallowed color type byte values, or cast to integer to print it.*/ + LCT_MAX_OCTET_VALUE = 255 +} LodePNGColorType; + +#ifdef LODEPNG_COMPILE_DECODER +/* +Converts PNG data in memory to raw pixel data. +out: Output parameter. Pointer to buffer that will contain the raw pixel data. + After decoding, its size is w * h * (bytes per pixel) bytes larger than + initially. Bytes per pixel depends on colortype and bitdepth. + Must be freed after usage with free(*out). + Note: for 16-bit per channel colors, uses big endian format like PNG does. +w: Output parameter. Pointer to width of pixel data. +h: Output parameter. Pointer to height of pixel data. +in: Memory buffer with the PNG file. +insize: size of the in buffer. +colortype: the desired color type for the raw output image. See explanation on PNG color types. +bitdepth: the desired bit depth for the raw output image. See explanation on PNG color types. +Return value: LodePNG error code (0 means no error). +*/ +unsigned lodepng_decode_memory(unsigned char** out, unsigned* w, unsigned* h, + const unsigned char* in, size_t insize, + LodePNGColorType colortype, unsigned bitdepth); + +/*Same as lodepng_decode_memory, but always decodes to 32-bit RGBA raw image*/ +unsigned lodepng_decode32(unsigned char** out, unsigned* w, unsigned* h, + const unsigned char* in, size_t insize); + +/*Same as lodepng_decode_memory, but always decodes to 24-bit RGB raw image*/ +unsigned lodepng_decode24(unsigned char** out, unsigned* w, unsigned* h, + const unsigned char* in, size_t insize); + +#ifdef LODEPNG_COMPILE_DISK +/* +Load PNG from disk, from file with given name. +Same as the other decode functions, but instead takes a filename as input. + +NOTE: Wide-character filenames are not supported, you can use an external method +to handle such files and decode in-memory.*/ +unsigned lodepng_decode_file(unsigned char** out, unsigned* w, unsigned* h, + const char* filename, + LodePNGColorType colortype, unsigned bitdepth); + +/*Same as lodepng_decode_file, but always decodes to 32-bit RGBA raw image. + +NOTE: Wide-character filenames are not supported, you can use an external method +to handle such files and decode in-memory.*/ +unsigned lodepng_decode32_file(unsigned char** out, unsigned* w, unsigned* h, + const char* filename); + +/*Same as lodepng_decode_file, but always decodes to 24-bit RGB raw image. + +NOTE: Wide-character filenames are not supported, you can use an external method +to handle such files and decode in-memory.*/ +unsigned lodepng_decode24_file(unsigned char** out, unsigned* w, unsigned* h, + const char* filename); +#endif /*LODEPNG_COMPILE_DISK*/ +#endif /*LODEPNG_COMPILE_DECODER*/ + + +#ifdef LODEPNG_COMPILE_ENCODER +/* +Converts raw pixel data into a PNG image in memory. The colortype and bitdepth + of the output PNG image cannot be chosen, they are automatically determined + by the colortype, bitdepth and content of the input pixel data. + Note: for 16-bit per channel colors, needs big endian format like PNG does. +out: Output parameter. Pointer to buffer that will contain the PNG image data. + Must be freed after usage with free(*out). +outsize: Output parameter. Pointer to the size in bytes of the out buffer. +image: The raw pixel data to encode. The size of this buffer should be + w * h * (bytes per pixel), bytes per pixel depends on colortype and bitdepth. +w: width of the raw pixel data in pixels. +h: height of the raw pixel data in pixels. +colortype: the color type of the raw input image. See explanation on PNG color types. +bitdepth: the bit depth of the raw input image. See explanation on PNG color types. +Return value: LodePNG error code (0 means no error). +*/ +unsigned lodepng_encode_memory(unsigned char** out, size_t* outsize, + const unsigned char* image, unsigned w, unsigned h, + LodePNGColorType colortype, unsigned bitdepth); + +/*Same as lodepng_encode_memory, but always encodes from 32-bit RGBA raw image.*/ +unsigned lodepng_encode32(unsigned char** out, size_t* outsize, + const unsigned char* image, unsigned w, unsigned h); + +/*Same as lodepng_encode_memory, but always encodes from 24-bit RGB raw image.*/ +unsigned lodepng_encode24(unsigned char** out, size_t* outsize, + const unsigned char* image, unsigned w, unsigned h); + +#ifdef LODEPNG_COMPILE_DISK +/* +Converts raw pixel data into a PNG file on disk. +Same as the other encode functions, but instead takes a filename as output. + +NOTE: This overwrites existing files without warning! + +NOTE: Wide-character filenames are not supported, you can use an external method +to handle such files and encode in-memory.*/ +unsigned lodepng_encode_file(const char* filename, + const unsigned char* image, unsigned w, unsigned h, + LodePNGColorType colortype, unsigned bitdepth); + +/*Same as lodepng_encode_file, but always encodes from 32-bit RGBA raw image. + +NOTE: Wide-character filenames are not supported, you can use an external method +to handle such files and encode in-memory.*/ +unsigned lodepng_encode32_file(const char* filename, + const unsigned char* image, unsigned w, unsigned h); + +/*Same as lodepng_encode_file, but always encodes from 24-bit RGB raw image. + +NOTE: Wide-character filenames are not supported, you can use an external method +to handle such files and encode in-memory.*/ +unsigned lodepng_encode24_file(const char* filename, + const unsigned char* image, unsigned w, unsigned h); +#endif /*LODEPNG_COMPILE_DISK*/ +#endif /*LODEPNG_COMPILE_ENCODER*/ + + +#ifdef LODEPNG_COMPILE_CPP +namespace lodepng { +#ifdef LODEPNG_COMPILE_DECODER +/*Same as lodepng_decode_memory, but decodes to an std::vector. The colortype +is the format to output the pixels to. Default is RGBA 8-bit per channel.*/ +unsigned decode(std::vector& out, unsigned& w, unsigned& h, + const unsigned char* in, size_t insize, + LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); +unsigned decode(std::vector& out, unsigned& w, unsigned& h, + const std::vector& in, + LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); +#ifdef LODEPNG_COMPILE_DISK +/* +Converts PNG file from disk to raw pixel data in memory. +Same as the other decode functions, but instead takes a filename as input. + +NOTE: Wide-character filenames are not supported, you can use an external method +to handle such files and decode in-memory. +*/ +unsigned decode(std::vector& out, unsigned& w, unsigned& h, + const std::string& filename, + LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); +#endif /* LODEPNG_COMPILE_DISK */ +#endif /* LODEPNG_COMPILE_DECODER */ + +#ifdef LODEPNG_COMPILE_ENCODER +/*Same as lodepng_encode_memory, but encodes to an std::vector. colortype +is that of the raw input data. The output PNG color type will be auto chosen.*/ +unsigned encode(std::vector& out, + const unsigned char* in, unsigned w, unsigned h, + LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); +unsigned encode(std::vector& out, + const std::vector& in, unsigned w, unsigned h, + LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); +#ifdef LODEPNG_COMPILE_DISK +/* +Converts 32-bit RGBA raw pixel data into a PNG file on disk. +Same as the other encode functions, but instead takes a filename as output. + +NOTE: This overwrites existing files without warning! + +NOTE: Wide-character filenames are not supported, you can use an external method +to handle such files and decode in-memory. +*/ +unsigned encode(const std::string& filename, + const unsigned char* in, unsigned w, unsigned h, + LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); +unsigned encode(const std::string& filename, + const std::vector& in, unsigned w, unsigned h, + LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); +#endif /* LODEPNG_COMPILE_DISK */ +#endif /* LODEPNG_COMPILE_ENCODER */ +} /* namespace lodepng */ +#endif /*LODEPNG_COMPILE_CPP*/ +#endif /*LODEPNG_COMPILE_PNG*/ + +#ifdef LODEPNG_COMPILE_ERROR_TEXT +/*Returns an English description of the numerical error code.*/ +const char* lodepng_error_text(unsigned code); +#endif /*LODEPNG_COMPILE_ERROR_TEXT*/ + +#ifdef LODEPNG_COMPILE_DECODER +/*Settings for zlib decompression*/ +typedef struct LodePNGDecompressSettings LodePNGDecompressSettings; +struct LodePNGDecompressSettings { + /* Check LodePNGDecoderSettings for more ignorable errors such as ignore_crc */ + unsigned ignore_adler32; /*if 1, continue and don't give an error message if the Adler32 checksum is corrupted*/ + unsigned ignore_nlen; /*ignore complement of len checksum in uncompressed blocks*/ + + /*Maximum decompressed size, beyond this the decoder may (and is encouraged to) stop decoding, + return an error, output a data size > max_output_size and all the data up to that point. This is + not hard limit nor a guarantee, but can prevent excessive memory usage. This setting is + ignored by the PNG decoder, but is used by the deflate/zlib decoder and can be used by custom ones. + Set to 0 to impose no limit (the default).*/ + size_t max_output_size; + + /*use custom zlib decoder instead of built in one (default: null). + Should return 0 if success, any non-0 if error (numeric value not exposed).*/ + unsigned (*custom_zlib)(unsigned char**, size_t*, + const unsigned char*, size_t, + const LodePNGDecompressSettings*); + /*use custom deflate decoder instead of built in one (default: null) + if custom_zlib is not null, custom_inflate is ignored (the zlib format uses deflate). + Should return 0 if success, any non-0 if error (numeric value not exposed).*/ + unsigned (*custom_inflate)(unsigned char**, size_t*, + const unsigned char*, size_t, + const LodePNGDecompressSettings*); + + const void* custom_context; /*optional custom settings for custom functions*/ +}; + +extern const LodePNGDecompressSettings lodepng_default_decompress_settings; +void lodepng_decompress_settings_init(LodePNGDecompressSettings* settings); +#endif /*LODEPNG_COMPILE_DECODER*/ + +#ifdef LODEPNG_COMPILE_ENCODER +/* +Settings for zlib compression. Tweaking these settings tweaks the balance +between speed and compression ratio. +*/ +typedef struct LodePNGCompressSettings LodePNGCompressSettings; +struct LodePNGCompressSettings /*deflate = compress*/ { + /*LZ77 related settings*/ + unsigned btype; /*the block type for LZ (0, 1, 2 or 3, see zlib standard). Should be 2 for proper compression.*/ + unsigned use_lz77; /*whether or not to use LZ77. Should be 1 for proper compression.*/ + unsigned windowsize; /*must be a power of two <= 32768. higher compresses more but is slower. Default value: 2048.*/ + unsigned minmatch; /*minimum lz77 length. 3 is normally best, 6 can be better for some PNGs. Default: 0*/ + unsigned nicematch; /*stop searching if >= this length found. Set to 258 for best compression. Default: 128*/ + unsigned lazymatching; /*use lazy matching: better compression but a bit slower. Default: true*/ + + /*use custom zlib encoder instead of built in one (default: null)*/ + unsigned (*custom_zlib)(unsigned char**, size_t*, + const unsigned char*, size_t, + const LodePNGCompressSettings*); + /*use custom deflate encoder instead of built in one (default: null) + if custom_zlib is used, custom_deflate is ignored since only the built in + zlib function will call custom_deflate*/ + unsigned (*custom_deflate)(unsigned char**, size_t*, + const unsigned char*, size_t, + const LodePNGCompressSettings*); + + const void* custom_context; /*optional custom settings for custom functions*/ +}; + +extern const LodePNGCompressSettings lodepng_default_compress_settings; +void lodepng_compress_settings_init(LodePNGCompressSettings* settings); +#endif /*LODEPNG_COMPILE_ENCODER*/ + +#ifdef LODEPNG_COMPILE_PNG +/* +Color mode of an image. Contains all information required to decode the pixel +bits to RGBA colors. This information is the same as used in the PNG file +format, and is used both for PNG and raw image data in LodePNG. +*/ +typedef struct LodePNGColorMode { + /*header (IHDR)*/ + LodePNGColorType colortype; /*color type, see PNG standard or documentation further in this header file*/ + unsigned bitdepth; /*bits per sample, see PNG standard or documentation further in this header file*/ + + /* + palette (PLTE and tRNS) + + Dynamically allocated with the colors of the palette, including alpha. + This field may not be allocated directly, use lodepng_color_mode_init first, + then lodepng_palette_add per color to correctly initialize it (to ensure size + of exactly 1024 bytes). + + The alpha channels must be set as well, set them to 255 for opaque images. + + When decoding, with the default settings you can ignore this palette, since + LodePNG already fills the palette colors in the pixels of the raw RGBA output, + but when decoding to the original PNG color mode it is needed to reconstruct + the colors. + + The palette is only supported for color type 3. + */ + unsigned char* palette; /*palette in RGBARGBA... order. Must be either 0, or when allocated must have 1024 bytes*/ + size_t palettesize; /*palette size in number of colors (amount of used bytes is 4 * palettesize)*/ + + /* + transparent color key (tRNS) + + This color uses the same bit depth as the bitdepth value in this struct, which can be 1-bit to 16-bit. + For grayscale PNGs, r, g and b will all 3 be set to the same. + + When decoding, by default you can ignore this information, since LodePNG sets + pixels with this key to transparent already in the raw RGBA output. + + The color key is only supported for color types 0 and 2. + */ + unsigned key_defined; /*is a transparent color key given? 0 = false, 1 = true*/ + unsigned key_r; /*red/grayscale component of color key*/ + unsigned key_g; /*green component of color key*/ + unsigned key_b; /*blue component of color key*/ +} LodePNGColorMode; + +/*init, cleanup and copy functions to use with this struct*/ +void lodepng_color_mode_init(LodePNGColorMode* info); +void lodepng_color_mode_cleanup(LodePNGColorMode* info); +/*return value is error code (0 means no error)*/ +unsigned lodepng_color_mode_copy(LodePNGColorMode* dest, const LodePNGColorMode* source); +/* Makes a temporary LodePNGColorMode that does not need cleanup (no palette) */ +LodePNGColorMode lodepng_color_mode_make(LodePNGColorType colortype, unsigned bitdepth); + +void lodepng_palette_clear(LodePNGColorMode* info); +/*add 1 color to the palette*/ +unsigned lodepng_palette_add(LodePNGColorMode* info, + unsigned char r, unsigned char g, unsigned char b, unsigned char a); + +/*get the total amount of bits per pixel, based on colortype and bitdepth in the struct*/ +unsigned lodepng_get_bpp(const LodePNGColorMode* info); +/*get the amount of color channels used, based on colortype in the struct. +If a palette is used, it counts as 1 channel.*/ +unsigned lodepng_get_channels(const LodePNGColorMode* info); +/*is it a grayscale type? (only colortype 0 or 4)*/ +unsigned lodepng_is_greyscale_type(const LodePNGColorMode* info); +/*has it got an alpha channel? (only colortype 2 or 6)*/ +unsigned lodepng_is_alpha_type(const LodePNGColorMode* info); +/*has it got a palette? (only colortype 3)*/ +unsigned lodepng_is_palette_type(const LodePNGColorMode* info); +/*only returns true if there is a palette and there is a value in the palette with alpha < 255. +Loops through the palette to check this.*/ +unsigned lodepng_has_palette_alpha(const LodePNGColorMode* info); +/* +Check if the given color info indicates the possibility of having non-opaque pixels in the PNG image. +Returns true if the image can have translucent or invisible pixels (it still be opaque if it doesn't use such pixels). +Returns false if the image can only have opaque pixels. +In detail, it returns true only if it's a color type with alpha, or has a palette with non-opaque values, +or if "key_defined" is true. +*/ +unsigned lodepng_can_have_alpha(const LodePNGColorMode* info); +/*Returns the byte size of a raw image buffer with given width, height and color mode*/ +size_t lodepng_get_raw_size(unsigned w, unsigned h, const LodePNGColorMode* color); + +#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS +/*The information of a Time chunk in PNG.*/ +typedef struct LodePNGTime { + unsigned year; /*2 bytes used (0-65535)*/ + unsigned month; /*1-12*/ + unsigned day; /*1-31*/ + unsigned hour; /*0-23*/ + unsigned minute; /*0-59*/ + unsigned second; /*0-60 (to allow for leap seconds)*/ +} LodePNGTime; +#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ + +/*Information about the PNG image, except pixels, width and height.*/ +typedef struct LodePNGInfo { + /*header (IHDR), palette (PLTE) and transparency (tRNS) chunks*/ + unsigned compression_method;/*compression method of the original file. Always 0.*/ + unsigned filter_method; /*filter method of the original file*/ + unsigned interlace_method; /*interlace method of the original file: 0=none, 1=Adam7*/ + LodePNGColorMode color; /*color type and bits, palette and transparency of the PNG file*/ + +#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS + /* + Suggested background color chunk (bKGD) + + This uses the same color mode and bit depth as the PNG (except no alpha channel), + with values truncated to the bit depth in the unsigned integer. + + For grayscale and palette PNGs, the value is stored in background_r. The values + in background_g and background_b are then unused. The decoder will set them + equal to background_r, the encoder ignores them in this case. + + When decoding, you may get these in a different color mode than the one you requested + for the raw pixels: the colortype and bitdepth defined by info_png.color, that is the + ones defined in the header of the PNG image, are used. + + When encoding with auto_convert, you must use the color model defined in info_png.color for + these values. The encoder normally ignores info_png.color when auto_convert is on, but will + use it to interpret these values (and convert copies of them to its chosen color model). + + When encoding, avoid setting this to an expensive color, such as a non-gray value + when the image is gray, or the compression will be worse since it will be forced to + write the PNG with a more expensive color mode (when auto_convert is on). + + The decoder does not use this background color to edit the color of pixels. This is a + completely optional metadata feature. + */ + unsigned background_defined; /*is a suggested background color given?*/ + unsigned background_r; /*red/gray/palette component of suggested background color*/ + unsigned background_g; /*green component of suggested background color*/ + unsigned background_b; /*blue component of suggested background color*/ + + /* + Non-international text chunks (tEXt and zTXt) + + The char** arrays each contain num strings. The actual messages are in + text_strings, while text_keys are keywords that give a short description what + the actual text represents, e.g. Title, Author, Description, or anything else. + + All the string fields below including strings, keys, names and language tags are null terminated. + The PNG specification uses null characters for the keys, names and tags, and forbids null + characters to appear in the main text which is why we can use null termination everywhere here. + + A keyword is minimum 1 character and maximum 79 characters long (plus the + additional null terminator). It's discouraged to use a single line length + longer than 79 characters for texts. + + Don't allocate these text buffers yourself. Use the init/cleanup functions + correctly and use lodepng_add_text and lodepng_clear_text. + + Standard text chunk keywords and strings are encoded using Latin-1. + */ + size_t text_num; /*the amount of texts in these char** buffers (there may be more texts in itext)*/ + char** text_keys; /*the keyword of a text chunk (e.g. "Comment")*/ + char** text_strings; /*the actual text*/ + + /* + International text chunks (iTXt) + Similar to the non-international text chunks, but with additional strings + "langtags" and "transkeys", and the following text encodings are used: + keys: Latin-1, langtags: ASCII, transkeys and strings: UTF-8. + keys must be 1-79 characters (plus the additional null terminator), the other + strings are any length. + */ + size_t itext_num; /*the amount of international texts in this PNG*/ + char** itext_keys; /*the English keyword of the text chunk (e.g. "Comment")*/ + char** itext_langtags; /*language tag for this text's language, ISO/IEC 646 string, e.g. ISO 639 language tag*/ + char** itext_transkeys; /*keyword translated to the international language - UTF-8 string*/ + char** itext_strings; /*the actual international text - UTF-8 string*/ + + /*time chunk (tIME)*/ + unsigned time_defined; /*set to 1 to make the encoder generate a tIME chunk*/ + LodePNGTime time; + + /*phys chunk (pHYs)*/ + unsigned phys_defined; /*if 0, there is no pHYs chunk and the values below are undefined, if 1 else there is one*/ + unsigned phys_x; /*pixels per unit in x direction*/ + unsigned phys_y; /*pixels per unit in y direction*/ + unsigned phys_unit; /*may be 0 (unknown unit) or 1 (metre)*/ + + /* + Color profile related chunks: gAMA, cHRM, sRGB, iCPP, sBIT + + LodePNG does not apply any color conversions on pixels in the encoder or decoder and does not interpret these color + profile values. It merely passes on the information. If you wish to use color profiles and convert colors, please + use these values with a color management library. + + See the PNG, ICC and sRGB specifications for more information about the meaning of these values. + */ + + /* gAMA chunk: optional, overridden by sRGB or iCCP if those are present. */ + unsigned gama_defined; /* Whether a gAMA chunk is present (0 = not present, 1 = present). */ + unsigned gama_gamma; /* Gamma exponent times 100000 */ + + /* cHRM chunk: optional, overridden by sRGB or iCCP if those are present. */ + unsigned chrm_defined; /* Whether a cHRM chunk is present (0 = not present, 1 = present). */ + unsigned chrm_white_x; /* White Point x times 100000 */ + unsigned chrm_white_y; /* White Point y times 100000 */ + unsigned chrm_red_x; /* Red x times 100000 */ + unsigned chrm_red_y; /* Red y times 100000 */ + unsigned chrm_green_x; /* Green x times 100000 */ + unsigned chrm_green_y; /* Green y times 100000 */ + unsigned chrm_blue_x; /* Blue x times 100000 */ + unsigned chrm_blue_y; /* Blue y times 100000 */ + + /* + sRGB chunk: optional. May not appear at the same time as iCCP. + If gAMA is also present gAMA must contain value 45455. + If cHRM is also present cHRM must contain respectively 31270,32900,64000,33000,30000,60000,15000,6000. + */ + unsigned srgb_defined; /* Whether an sRGB chunk is present (0 = not present, 1 = present). */ + unsigned srgb_intent; /* Rendering intent: 0=perceptual, 1=rel. colorimetric, 2=saturation, 3=abs. colorimetric */ + + /* + iCCP chunk: optional. May not appear at the same time as sRGB. + + LodePNG does not parse or use the ICC profile (except its color space header field for an edge case), a + separate library to handle the ICC data (not included in LodePNG) format is needed to use it for color + management and conversions. + + For encoding, if iCCP is present, gAMA and cHRM are recommended to be added as well with values that match the ICC + profile as closely as possible, if you wish to do this you should provide the correct values for gAMA and cHRM and + enable their '_defined' flags since LodePNG will not automatically compute them from the ICC profile. + + For encoding, the ICC profile is required by the PNG specification to be an "RGB" profile for non-gray + PNG color types and a "GRAY" profile for gray PNG color types. If you disable auto_convert, you must ensure + the ICC profile type matches your requested color type, else the encoder gives an error. If auto_convert is + enabled (the default), and the ICC profile is not a good match for the pixel data, this will result in an encoder + error if the pixel data has non-gray pixels for a GRAY profile, or a silent less-optimal compression of the pixel + data if the pixels could be encoded as grayscale but the ICC profile is RGB. + + To avoid this do not set an ICC profile in the image unless there is a good reason for it, and when doing so + make sure you compute it carefully to avoid the above problems. + */ + unsigned iccp_defined; /* Whether an iCCP chunk is present (0 = not present, 1 = present). */ + char* iccp_name; /* Null terminated string with profile name, 1-79 bytes */ + /* + The ICC profile in iccp_profile_size bytes. + Don't allocate this buffer yourself. Use the init/cleanup functions + correctly and use lodepng_set_icc and lodepng_clear_icc. + */ + unsigned char* iccp_profile; + unsigned iccp_profile_size; /* The size of iccp_profile in bytes */ + + /* + sBIT chunk: significant bits. Optional metadata, only set this if needed. + + If defined, these values give the bit depth of the original data. Since PNG only stores 1, 2, 4, 8 or 16-bit + per channel data, the significant bits value can be used to indicate the original encoded data has another + sample depth, such as 10 or 12. + + Encoders using this value, when storing the pixel data, should use the most significant bits + of the data to store the original bits, and use a good sample depth scaling method such as + "left bit replication" to fill in the least significant bits, rather than fill zeroes. + + Decoders using this value, if able to work with data that's e.g. 10-bit or 12-bit, should right + shift the data to go back to the original bit depth, but decoders are also allowed to ignore + sbit and work e.g. with the 8-bit or 16-bit data from the PNG directly, since thanks + to the encoder contract, the values encoded in PNG are in valid range for the PNG bit depth. + + For grayscale images, sbit_g and sbit_b are not used, and for images that don't use color + type RGBA or grayscale+alpha, sbit_a is not used (it's not used even for palette images with + translucent palette values, or images with color key). The values that are used must be + greater than zero and smaller than or equal to the PNG bit depth. + + The color type from the header in the PNG image defines these used and unused fields: if + decoding with a color mode conversion, such as always decoding to RGBA, this metadata still + only uses the color type of the original PNG, and may e.g. lack the alpha channel info + if the PNG was RGB. When encoding with auto_convert (as well as without), also always the + color model defined in info_png.color determines this. + + NOTE: enabling sbit can hurt compression, because the encoder can then not always use + auto_convert to choose a more optimal color mode for the data, because the PNG format has + strict requirements for the allowed sbit values in combination with color modes. + For example, setting these fields to 10-bit will force the encoder to keep using a 16-bit per channel + color mode, even if the pixel data would in fact fit in a more efficient 8-bit mode. + */ + unsigned sbit_defined; /*is significant bits given? if not, the values below are unused*/ + unsigned sbit_r; /*red or gray component of significant bits*/ + unsigned sbit_g; /*green component of significant bits*/ + unsigned sbit_b; /*blue component of significant bits*/ + unsigned sbit_a; /*alpha component of significant bits*/ + + /* End of color profile related chunks */ + + + /* + unknown chunks: chunks not known by LodePNG, passed on byte for byte. + + There are 3 buffers, one for each position in the PNG where unknown chunks can appear. + Each buffer contains all unknown chunks for that position consecutively. + The 3 positions are: + 0: between IHDR and PLTE, 1: between PLTE and IDAT, 2: between IDAT and IEND. + + For encoding, do not store critical chunks or known chunks that are enabled with a "_defined" flag + above in here, since the encoder will blindly follow this and could then encode an invalid PNG file + (such as one with two IHDR chunks or the disallowed combination of sRGB with iCCP). But do use + this if you wish to store an ancillary chunk that is not supported by LodePNG (such as sPLT or hIST), + or any non-standard PNG chunk. + + Do not allocate or traverse this data yourself. Use the chunk traversing functions declared + later, such as lodepng_chunk_next and lodepng_chunk_append, to read/write this struct. + */ + unsigned char* unknown_chunks_data[3]; + size_t unknown_chunks_size[3]; /*size in bytes of the unknown chunks, given for protection*/ +#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ +} LodePNGInfo; + +/*init, cleanup and copy functions to use with this struct*/ +void lodepng_info_init(LodePNGInfo* info); +void lodepng_info_cleanup(LodePNGInfo* info); +/*return value is error code (0 means no error)*/ +unsigned lodepng_info_copy(LodePNGInfo* dest, const LodePNGInfo* source); + +#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS +unsigned lodepng_add_text(LodePNGInfo* info, const char* key, const char* str); /*push back both texts at once*/ +void lodepng_clear_text(LodePNGInfo* info); /*use this to clear the texts again after you filled them in*/ + +unsigned lodepng_add_itext(LodePNGInfo* info, const char* key, const char* langtag, + const char* transkey, const char* str); /*push back the 4 texts of 1 chunk at once*/ +void lodepng_clear_itext(LodePNGInfo* info); /*use this to clear the itexts again after you filled them in*/ + +/*replaces if exists*/ +unsigned lodepng_set_icc(LodePNGInfo* info, const char* name, const unsigned char* profile, unsigned profile_size); +void lodepng_clear_icc(LodePNGInfo* info); /*use this to clear the texts again after you filled them in*/ +#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ + +/* +Converts raw buffer from one color type to another color type, based on +LodePNGColorMode structs to describe the input and output color type. +See the reference manual at the end of this header file to see which color conversions are supported. +return value = LodePNG error code (0 if all went ok, an error if the conversion isn't supported) +The out buffer must have size (w * h * bpp + 7) / 8, where bpp is the bits per pixel +of the output color type (lodepng_get_bpp). +For < 8 bpp images, there should not be padding bits at the end of scanlines. +For 16-bit per channel colors, uses big endian format like PNG does. +Return value is LodePNG error code +*/ +unsigned lodepng_convert(unsigned char* out, const unsigned char* in, + const LodePNGColorMode* mode_out, const LodePNGColorMode* mode_in, + unsigned w, unsigned h); + +#ifdef LODEPNG_COMPILE_DECODER +/* +Settings for the decoder. This contains settings for the PNG and the Zlib +decoder, but not the Info settings from the Info structs. +*/ +typedef struct LodePNGDecoderSettings { + LodePNGDecompressSettings zlibsettings; /*in here is the setting to ignore Adler32 checksums*/ + + /* Check LodePNGDecompressSettings for more ignorable errors such as ignore_adler32 */ + unsigned ignore_crc; /*ignore CRC checksums*/ + unsigned ignore_critical; /*ignore unknown critical chunks*/ + unsigned ignore_end; /*ignore issues at end of file if possible (missing IEND chunk, too large chunk, ...)*/ + /* TODO: make a system involving warnings with levels and a strict mode instead. Other potentially recoverable + errors: srgb rendering intent value, size of content of ancillary chunks, more than 79 characters for some + strings, placement/combination rules for ancillary chunks, crc of unknown chunks, allowed characters + in string keys, etc... */ + + unsigned color_convert; /*whether to convert the PNG to the color type you want. Default: yes*/ + +#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS + unsigned read_text_chunks; /*if false but remember_unknown_chunks is true, they're stored in the unknown chunks*/ + + /*store all bytes from unknown chunks in the LodePNGInfo (off by default, useful for a png editor)*/ + unsigned remember_unknown_chunks; + + /* maximum size for decompressed text chunks. If a text chunk's text is larger than this, an error is returned, + unless reading text chunks is disabled or this limit is set higher or disabled. Set to 0 to allow any size. + By default it is a value that prevents unreasonably large strings from hogging memory. */ + size_t max_text_size; + + /* maximum size for compressed ICC chunks. If the ICC profile is larger than this, an error will be returned. Set to + 0 to allow any size. By default this is a value that prevents ICC profiles that would be much larger than any + legitimate profile could be to hog memory. */ + size_t max_icc_size; +#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ +} LodePNGDecoderSettings; + +void lodepng_decoder_settings_init(LodePNGDecoderSettings* settings); +#endif /*LODEPNG_COMPILE_DECODER*/ + +#ifdef LODEPNG_COMPILE_ENCODER +/*automatically use color type with less bits per pixel if losslessly possible. Default: AUTO*/ +typedef enum LodePNGFilterStrategy { + /*every filter at zero*/ + LFS_ZERO = 0, + /*every filter at 1, 2, 3 or 4 (paeth), unlike LFS_ZERO not a good choice, but for testing*/ + LFS_ONE = 1, + LFS_TWO = 2, + LFS_THREE = 3, + LFS_FOUR = 4, + /*Use filter that gives minimum sum, as described in the official PNG filter heuristic.*/ + LFS_MINSUM, + /*Use the filter type that gives smallest Shannon entropy for this scanline. Depending + on the image, this is better or worse than minsum.*/ + LFS_ENTROPY, + /* + Brute-force-search PNG filters by compressing each filter for each scanline. + Experimental, very slow, and only rarely gives better compression than MINSUM. + */ + LFS_BRUTE_FORCE, + /*use predefined_filters buffer: you specify the filter type for each scanline*/ + LFS_PREDEFINED +} LodePNGFilterStrategy; + +/*Gives characteristics about the integer RGBA colors of the image (count, alpha channel usage, bit depth, ...), +which helps decide which color model to use for encoding. +Used internally by default if "auto_convert" is enabled. Public because it's useful for custom algorithms.*/ +typedef struct LodePNGColorStats { + unsigned colored; /*not grayscale*/ + unsigned key; /*image is not opaque and color key is possible instead of full alpha*/ + unsigned short key_r; /*key values, always as 16-bit, in 8-bit case the byte is duplicated, e.g. 65535 means 255*/ + unsigned short key_g; + unsigned short key_b; + unsigned alpha; /*image is not opaque and alpha channel or alpha palette required*/ + unsigned numcolors; /*amount of colors, up to 257. Not valid if bits == 16 or allow_palette is disabled.*/ + unsigned char palette[1024]; /*Remembers up to the first 256 RGBA colors, in no particular order, only valid when numcolors is valid*/ + unsigned bits; /*bits per channel (not for palette). 1,2 or 4 for grayscale only. 16 if 16-bit per channel required.*/ + size_t numpixels; + + /*user settings for computing/using the stats*/ + unsigned allow_palette; /*default 1. if 0, disallow choosing palette colortype in auto_choose_color, and don't count numcolors*/ + unsigned allow_greyscale; /*default 1. if 0, choose RGB or RGBA even if the image only has gray colors*/ +} LodePNGColorStats; + +void lodepng_color_stats_init(LodePNGColorStats* stats); + +/*Get a LodePNGColorStats of the image. The stats must already have been inited. +Returns error code (e.g. alloc fail) or 0 if ok.*/ +unsigned lodepng_compute_color_stats(LodePNGColorStats* stats, + const unsigned char* image, unsigned w, unsigned h, + const LodePNGColorMode* mode_in); + +/*Settings for the encoder.*/ +typedef struct LodePNGEncoderSettings { + LodePNGCompressSettings zlibsettings; /*settings for the zlib encoder, such as window size, ...*/ + + unsigned auto_convert; /*automatically choose output PNG color type. Default: true*/ + + /*If true, follows the official PNG heuristic: if the PNG uses a palette or lower than + 8 bit depth, set all filters to zero. Otherwise use the filter_strategy. Note that to + completely follow the official PNG heuristic, filter_palette_zero must be true and + filter_strategy must be LFS_MINSUM*/ + unsigned filter_palette_zero; + /*Which filter strategy to use when not using zeroes due to filter_palette_zero. + Set filter_palette_zero to 0 to ensure always using your chosen strategy. Default: LFS_MINSUM*/ + LodePNGFilterStrategy filter_strategy; + /*used if filter_strategy is LFS_PREDEFINED. In that case, this must point to a buffer with + the same length as the amount of scanlines in the image, and each value must <= 5. You + have to cleanup this buffer, LodePNG will never free it. Don't forget that filter_palette_zero + must be set to 0 to ensure this is also used on palette or low bitdepth images.*/ + const unsigned char* predefined_filters; + + /*force creating a PLTE chunk if colortype is 2 or 6 (= a suggested palette). + If colortype is 3, PLTE is always created. If color type is explicitely set + to a grayscale type (1 or 4), this is not done and is ignored. If enabling this, + a palette must be present in the info_png. + NOTE: enabling this may worsen compression if auto_convert is used to choose + optimal color mode, because it cannot use grayscale color modes in this case*/ + unsigned force_palette; +#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS + /*add LodePNG identifier and version as a text chunk, for debugging*/ + unsigned add_id; + /*encode text chunks as zTXt chunks instead of tEXt chunks, and use compression in iTXt chunks*/ + unsigned text_compression; +#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ +} LodePNGEncoderSettings; + +void lodepng_encoder_settings_init(LodePNGEncoderSettings* settings); +#endif /*LODEPNG_COMPILE_ENCODER*/ + + +#if defined(LODEPNG_COMPILE_DECODER) || defined(LODEPNG_COMPILE_ENCODER) +/*The settings, state and information for extended encoding and decoding.*/ +typedef struct LodePNGState { +#ifdef LODEPNG_COMPILE_DECODER + LodePNGDecoderSettings decoder; /*the decoding settings*/ +#endif /*LODEPNG_COMPILE_DECODER*/ +#ifdef LODEPNG_COMPILE_ENCODER + LodePNGEncoderSettings encoder; /*the encoding settings*/ +#endif /*LODEPNG_COMPILE_ENCODER*/ + LodePNGColorMode info_raw; /*specifies the format in which you would like to get the raw pixel buffer*/ + LodePNGInfo info_png; /*info of the PNG image obtained after decoding*/ + unsigned error; +} LodePNGState; + +/*init, cleanup and copy functions to use with this struct*/ +void lodepng_state_init(LodePNGState* state); +void lodepng_state_cleanup(LodePNGState* state); +void lodepng_state_copy(LodePNGState* dest, const LodePNGState* source); +#endif /* defined(LODEPNG_COMPILE_DECODER) || defined(LODEPNG_COMPILE_ENCODER) */ + +#ifdef LODEPNG_COMPILE_DECODER +/* +Same as lodepng_decode_memory, but uses a LodePNGState to allow custom settings and +getting much more information about the PNG image and color mode. +*/ +unsigned lodepng_decode(unsigned char** out, unsigned* w, unsigned* h, + LodePNGState* state, + const unsigned char* in, size_t insize); + +/* +Read the PNG header, but not the actual data. This returns only the information +that is in the IHDR chunk of the PNG, such as width, height and color type. The +information is placed in the info_png field of the LodePNGState. +*/ +unsigned lodepng_inspect(unsigned* w, unsigned* h, + LodePNGState* state, + const unsigned char* in, size_t insize); +#endif /*LODEPNG_COMPILE_DECODER*/ + +/* +Reads one metadata chunk (other than IHDR, which is handled by lodepng_inspect) +of the PNG file and outputs what it read in the state. Returns error code on failure. +Use lodepng_inspect first with a new state, then e.g. lodepng_chunk_find_const +to find the desired chunk type, and if non null use lodepng_inspect_chunk (with +chunk_pointer - start_of_file as pos). +Supports most metadata chunks from the PNG standard (gAMA, bKGD, tEXt, ...). +Ignores unsupported, unknown, non-metadata or IHDR chunks (without error). +Requirements: &in[pos] must point to start of a chunk, must use regular +lodepng_inspect first since format of most other chunks depends on IHDR, and if +there is a PLTE chunk, that one must be inspected before tRNS or bKGD. +*/ +unsigned lodepng_inspect_chunk(LodePNGState* state, size_t pos, + const unsigned char* in, size_t insize); + +#ifdef LODEPNG_COMPILE_ENCODER +/*This function allocates the out buffer with standard malloc and stores the size in *outsize.*/ +unsigned lodepng_encode(unsigned char** out, size_t* outsize, + const unsigned char* image, unsigned w, unsigned h, + LodePNGState* state); +#endif /*LODEPNG_COMPILE_ENCODER*/ + +/* +The lodepng_chunk functions are normally not needed, except to traverse the +unknown chunks stored in the LodePNGInfo struct, or add new ones to it. +It also allows traversing the chunks of an encoded PNG file yourself. + +The chunk pointer always points to the beginning of the chunk itself, that is +the first byte of the 4 length bytes. + +In the PNG file format, chunks have the following format: +-4 bytes length: length of the data of the chunk in bytes (chunk itself is 12 bytes longer) +-4 bytes chunk type (ASCII a-z,A-Z only, see below) +-length bytes of data (may be 0 bytes if length was 0) +-4 bytes of CRC, computed on chunk name + data + +The first chunk starts at the 8th byte of the PNG file, the entire rest of the file +exists out of concatenated chunks with the above format. + +PNG standard chunk ASCII naming conventions: +-First byte: uppercase = critical, lowercase = ancillary +-Second byte: uppercase = public, lowercase = private +-Third byte: must be uppercase +-Fourth byte: uppercase = unsafe to copy, lowercase = safe to copy +*/ + +/* +Gets the length of the data of the chunk. Total chunk length has 12 bytes more. +There must be at least 4 bytes to read from. If the result value is too large, +it may be corrupt data. +*/ +unsigned lodepng_chunk_length(const unsigned char* chunk); + +/*puts the 4-byte type in null terminated string*/ +void lodepng_chunk_type(char type[5], const unsigned char* chunk); + +/*check if the type is the given type*/ +unsigned char lodepng_chunk_type_equals(const unsigned char* chunk, const char* type); + +/*0: it's one of the critical chunk types, 1: it's an ancillary chunk (see PNG standard)*/ +unsigned char lodepng_chunk_ancillary(const unsigned char* chunk); + +/*0: public, 1: private (see PNG standard)*/ +unsigned char lodepng_chunk_private(const unsigned char* chunk); + +/*0: the chunk is unsafe to copy, 1: the chunk is safe to copy (see PNG standard)*/ +unsigned char lodepng_chunk_safetocopy(const unsigned char* chunk); + +/*get pointer to the data of the chunk, where the input points to the header of the chunk*/ +unsigned char* lodepng_chunk_data(unsigned char* chunk); +const unsigned char* lodepng_chunk_data_const(const unsigned char* chunk); + +/*returns 0 if the crc is correct, 1 if it's incorrect (0 for OK as usual!)*/ +unsigned lodepng_chunk_check_crc(const unsigned char* chunk); + +/*generates the correct CRC from the data and puts it in the last 4 bytes of the chunk*/ +void lodepng_chunk_generate_crc(unsigned char* chunk); + +/* +Iterate to next chunks, allows iterating through all chunks of the PNG file. +Input must be at the beginning of a chunk (result of a previous lodepng_chunk_next call, +or the 8th byte of a PNG file which always has the first chunk), or alternatively may +point to the first byte of the PNG file (which is not a chunk but the magic header, the +function will then skip over it and return the first real chunk). +Will output pointer to the start of the next chunk, or at or beyond end of the file if there +is no more chunk after this or possibly if the chunk is corrupt. +Start this process at the 8th byte of the PNG file. +In a non-corrupt PNG file, the last chunk should have name "IEND". +*/ +unsigned char* lodepng_chunk_next(unsigned char* chunk, unsigned char* end); +const unsigned char* lodepng_chunk_next_const(const unsigned char* chunk, const unsigned char* end); + +/*Finds the first chunk with the given type in the range [chunk, end), or returns NULL if not found.*/ +unsigned char* lodepng_chunk_find(unsigned char* chunk, unsigned char* end, const char type[5]); +const unsigned char* lodepng_chunk_find_const(const unsigned char* chunk, const unsigned char* end, const char type[5]); + +/* +Appends chunk to the data in out. The given chunk should already have its chunk header. +The out variable and outsize are updated to reflect the new reallocated buffer. +Returns error code (0 if it went ok) +*/ +unsigned lodepng_chunk_append(unsigned char** out, size_t* outsize, const unsigned char* chunk); + +/* +Appends new chunk to out. The chunk to append is given by giving its length, type +and data separately. The type is a 4-letter string. +The out variable and outsize are updated to reflect the new reallocated buffer. +Returne error code (0 if it went ok) +*/ +unsigned lodepng_chunk_create(unsigned char** out, size_t* outsize, size_t length, + const char* type, const unsigned char* data); + + +/*Calculate CRC32 of buffer*/ +unsigned lodepng_crc32(const unsigned char* buf, size_t len); +#endif /*LODEPNG_COMPILE_PNG*/ + + +#ifdef LODEPNG_COMPILE_ZLIB +/* +This zlib part can be used independently to zlib compress and decompress a +buffer. It cannot be used to create gzip files however, and it only supports the +part of zlib that is required for PNG, it does not support dictionaries. +*/ + +#ifdef LODEPNG_COMPILE_DECODER +/*Inflate a buffer. Inflate is the decompression step of deflate. Out buffer must be freed after use.*/ +unsigned lodepng_inflate(unsigned char** out, size_t* outsize, + const unsigned char* in, size_t insize, + const LodePNGDecompressSettings* settings); + +/* +Decompresses Zlib data. Reallocates the out buffer and appends the data. The +data must be according to the zlib specification. +Either, *out must be NULL and *outsize must be 0, or, *out must be a valid +buffer and *outsize its size in bytes. out must be freed by user after usage. +*/ +unsigned lodepng_zlib_decompress(unsigned char** out, size_t* outsize, + const unsigned char* in, size_t insize, + const LodePNGDecompressSettings* settings); +#endif /*LODEPNG_COMPILE_DECODER*/ + +#ifdef LODEPNG_COMPILE_ENCODER +/* +Compresses data with Zlib. Reallocates the out buffer and appends the data. +Zlib adds a small header and trailer around the deflate data. +The data is output in the format of the zlib specification. +Either, *out must be NULL and *outsize must be 0, or, *out must be a valid +buffer and *outsize its size in bytes. out must be freed by user after usage. +*/ +unsigned lodepng_zlib_compress(unsigned char** out, size_t* outsize, + const unsigned char* in, size_t insize, + const LodePNGCompressSettings* settings); + +/* +Find length-limited Huffman code for given frequencies. This function is in the +public interface only for tests, it's used internally by lodepng_deflate. +*/ +unsigned lodepng_huffman_code_lengths(unsigned* lengths, const unsigned* frequencies, + size_t numcodes, unsigned maxbitlen); + +/*Compress a buffer with deflate. See RFC 1951. Out buffer must be freed after use.*/ +unsigned lodepng_deflate(unsigned char** out, size_t* outsize, + const unsigned char* in, size_t insize, + const LodePNGCompressSettings* settings); + +#endif /*LODEPNG_COMPILE_ENCODER*/ +#endif /*LODEPNG_COMPILE_ZLIB*/ + +#ifdef LODEPNG_COMPILE_DISK +/* +Load a file from disk into buffer. The function allocates the out buffer, and +after usage you should free it. +out: output parameter, contains pointer to loaded buffer. +outsize: output parameter, size of the allocated out buffer +filename: the path to the file to load +return value: error code (0 means ok) + +NOTE: Wide-character filenames are not supported, you can use an external method +to handle such files and decode in-memory. +*/ +unsigned lodepng_load_file(unsigned char** out, size_t* outsize, const char* filename); + +/* +Save a file from buffer to disk. Warning, if it exists, this function overwrites +the file without warning! +buffer: the buffer to write +buffersize: size of the buffer to write +filename: the path to the file to save to +return value: error code (0 means ok) + +NOTE: Wide-character filenames are not supported, you can use an external method +to handle such files and encode in-memory +*/ +unsigned lodepng_save_file(const unsigned char* buffer, size_t buffersize, const char* filename); +#endif /*LODEPNG_COMPILE_DISK*/ + +#ifdef LODEPNG_COMPILE_CPP +/* The LodePNG C++ wrapper uses std::vectors instead of manually allocated memory buffers. */ +namespace lodepng { +#ifdef LODEPNG_COMPILE_PNG +class State : public LodePNGState { + public: + State(); + State(const State& other); + ~State(); + State& operator=(const State& other); +}; + +#ifdef LODEPNG_COMPILE_DECODER +/* Same as other lodepng::decode, but using a State for more settings and information. */ +unsigned decode(std::vector& out, unsigned& w, unsigned& h, + State& state, + const unsigned char* in, size_t insize); +unsigned decode(std::vector& out, unsigned& w, unsigned& h, + State& state, + const std::vector& in); +#endif /*LODEPNG_COMPILE_DECODER*/ + +#ifdef LODEPNG_COMPILE_ENCODER +/* Same as other lodepng::encode, but using a State for more settings and information. */ +unsigned encode(std::vector& out, + const unsigned char* in, unsigned w, unsigned h, + State& state); +unsigned encode(std::vector& out, + const std::vector& in, unsigned w, unsigned h, + State& state); +#endif /*LODEPNG_COMPILE_ENCODER*/ + +#ifdef LODEPNG_COMPILE_DISK +/* +Load a file from disk into an std::vector. +return value: error code (0 means ok) + +NOTE: Wide-character filenames are not supported, you can use an external method +to handle such files and decode in-memory +*/ +unsigned load_file(std::vector& buffer, const std::string& filename); + +/* +Save the binary data in an std::vector to a file on disk. The file is overwritten +without warning. + +NOTE: Wide-character filenames are not supported, you can use an external method +to handle such files and encode in-memory +*/ +unsigned save_file(const std::vector& buffer, const std::string& filename); +#endif /* LODEPNG_COMPILE_DISK */ +#endif /* LODEPNG_COMPILE_PNG */ + +#ifdef LODEPNG_COMPILE_ZLIB +#ifdef LODEPNG_COMPILE_DECODER +/* Zlib-decompress an unsigned char buffer */ +unsigned decompress(std::vector& out, const unsigned char* in, size_t insize, + const LodePNGDecompressSettings& settings = lodepng_default_decompress_settings); + +/* Zlib-decompress an std::vector */ +unsigned decompress(std::vector& out, const std::vector& in, + const LodePNGDecompressSettings& settings = lodepng_default_decompress_settings); +#endif /* LODEPNG_COMPILE_DECODER */ + +#ifdef LODEPNG_COMPILE_ENCODER +/* Zlib-compress an unsigned char buffer */ +unsigned compress(std::vector& out, const unsigned char* in, size_t insize, + const LodePNGCompressSettings& settings = lodepng_default_compress_settings); + +/* Zlib-compress an std::vector */ +unsigned compress(std::vector& out, const std::vector& in, + const LodePNGCompressSettings& settings = lodepng_default_compress_settings); +#endif /* LODEPNG_COMPILE_ENCODER */ +#endif /* LODEPNG_COMPILE_ZLIB */ +} /* namespace lodepng */ +#endif /*LODEPNG_COMPILE_CPP*/ + +/* +TODO: +[.] test if there are no memory leaks or security exploits - done a lot but needs to be checked often +[.] check compatibility with various compilers - done but needs to be redone for every newer version +[X] converting color to 16-bit per channel types +[X] support color profile chunk types (but never let them touch RGB values by default) +[ ] support all public PNG chunk types (almost done except sPLT and hIST) +[ ] make sure encoder generates no chunks with size > (2^31)-1 +[ ] partial decoding (stream processing) +[X] let the "isFullyOpaque" function check color keys and transparent palettes too +[X] better name for the variables "codes", "codesD", "codelengthcodes", "clcl" and "lldl" +[ ] allow treating some errors like warnings, when image is recoverable (e.g. 69, 57, 58) +[ ] make warnings like: oob palette, checksum fail, data after iend, wrong/unknown crit chunk, no null terminator in text, ... +[ ] error messages with line numbers (and version) +[ ] errors in state instead of as return code? +[ ] new errors/warnings like suspiciously big decompressed ztxt or iccp chunk +[ ] let the C++ wrapper catch exceptions coming from the standard library and return LodePNG error codes +[ ] allow user to provide custom color conversion functions, e.g. for premultiplied alpha, padding bits or not, ... +[ ] allow user to give data (void*) to custom allocator +[X] provide alternatives for C library functions not present on some platforms (memcpy, ...) +*/ + +#endif /*LODEPNG_H inclusion guard*/ + +/* +LodePNG Documentation +--------------------- + +0. table of contents +-------------------- + + 1. about + 1.1. supported features + 1.2. features not supported + 2. C and C++ version + 3. security + 4. decoding + 5. encoding + 6. color conversions + 6.1. PNG color types + 6.2. color conversions + 6.3. padding bits + 6.4. A note about 16-bits per channel and endianness + 7. error values + 8. chunks and PNG editing + 9. compiler support + 10. examples + 10.1. decoder C++ example + 10.2. decoder C example + 11. state settings reference + 12. changes + 13. contact information + + +1. about +-------- + +PNG is a file format to store raster images losslessly with good compression, +supporting different color types and alpha channel. + +LodePNG is a PNG codec according to the Portable Network Graphics (PNG) +Specification (Second Edition) - W3C Recommendation 10 November 2003. + +The specifications used are: + +*) Portable Network Graphics (PNG) Specification (Second Edition): + http://www.w3.org/TR/2003/REC-PNG-20031110 +*) RFC 1950 ZLIB Compressed Data Format version 3.3: + http://www.gzip.org/zlib/rfc-zlib.html +*) RFC 1951 DEFLATE Compressed Data Format Specification ver 1.3: + http://www.gzip.org/zlib/rfc-deflate.html + +The most recent version of LodePNG can currently be found at +http://lodev.org/lodepng/ + +LodePNG works both in C (ISO C90) and C++, with a C++ wrapper that adds +extra functionality. + +LodePNG exists out of two files: +-lodepng.h: the header file for both C and C++ +-lodepng.c(pp): give it the name lodepng.c or lodepng.cpp (or .cc) depending on your usage + +If you want to start using LodePNG right away without reading this doc, get the +examples from the LodePNG website to see how to use it in code, or check the +smaller examples in chapter 13 here. + +LodePNG is simple but only supports the basic requirements. To achieve +simplicity, the following design choices were made: There are no dependencies +on any external library. There are functions to decode and encode a PNG with +a single function call, and extended versions of these functions taking a +LodePNGState struct allowing to specify or get more information. By default +the colors of the raw image are always RGB or RGBA, no matter what color type +the PNG file uses. To read and write files, there are simple functions to +convert the files to/from buffers in memory. + +This all makes LodePNG suitable for loading textures in games, demos and small +programs, ... It's less suitable for full fledged image editors, loading PNGs +over network (it requires all the image data to be available before decoding can +begin), life-critical systems, ... + +1.1. supported features +----------------------- + +The following features are supported by the decoder: + +*) decoding of PNGs with any color type, bit depth and interlace mode, to a 24- or 32-bit color raw image, + or the same color type as the PNG +*) encoding of PNGs, from any raw image to 24- or 32-bit color, or the same color type as the raw image +*) Adam7 interlace and deinterlace for any color type +*) loading the image from harddisk or decoding it from a buffer from other sources than harddisk +*) support for alpha channels, including RGBA color model, translucent palettes and color keying +*) zlib decompression (inflate) +*) zlib compression (deflate) +*) CRC32 and ADLER32 checksums +*) colorimetric color profile conversions: currently experimentally available in lodepng_util.cpp only, + plus alternatively ability to pass on chroma/gamma/ICC profile information to other color management system. +*) handling of unknown chunks, allowing making a PNG editor that stores custom and unknown chunks. +*) the following chunks are supported by both encoder and decoder: + IHDR: header information + PLTE: color palette + IDAT: pixel data + IEND: the final chunk + tRNS: transparency for palettized images + tEXt: textual information + zTXt: compressed textual information + iTXt: international textual information + bKGD: suggested background color + pHYs: physical dimensions + tIME: modification time + cHRM: RGB chromaticities + gAMA: RGB gamma correction + iCCP: ICC color profile + sRGB: rendering intent + sBIT: significant bits + +1.2. features not supported +--------------------------- + +The following features are not (yet) supported: + +*) some features needed to make a conformant PNG-Editor might be still missing. +*) partial loading/stream processing. All data must be available and is processed in one call. +*) The hIST and sPLT public chunks are not (yet) supported but treated as unknown chunks + + +2. C and C++ version +-------------------- + +The C version uses buffers allocated with alloc that you need to free() +yourself. You need to use init and cleanup functions for each struct whenever +using a struct from the C version to avoid exploits and memory leaks. + +The C++ version has extra functions with std::vectors in the interface and the +lodepng::State class which is a LodePNGState with constructor and destructor. + +These files work without modification for both C and C++ compilers because all +the additional C++ code is in "#ifdef __cplusplus" blocks that make C-compilers +ignore it, and the C code is made to compile both with strict ISO C90 and C++. + +To use the C++ version, you need to rename the source file to lodepng.cpp +(instead of lodepng.c), and compile it with a C++ compiler. + +To use the C version, you need to rename the source file to lodepng.c (instead +of lodepng.cpp), and compile it with a C compiler. + + +3. Security +----------- + +Even if carefully designed, it's always possible that LodePNG contains possible +exploits. If you discover one, please let me know, and it will be fixed. + +When using LodePNG, care has to be taken with the C version of LodePNG, as well +as the C-style structs when working with C++. The following conventions are used +for all C-style structs: + +-if a struct has a corresponding init function, always call the init function when making a new one +-if a struct has a corresponding cleanup function, call it before the struct disappears to avoid memory leaks +-if a struct has a corresponding copy function, use the copy function instead of "=". + The destination must also be inited already. + + +4. Decoding +----------- + +Decoding converts a PNG compressed image to a raw pixel buffer. + +Most documentation on using the decoder is at its declarations in the header +above. For C, simple decoding can be done with functions such as +lodepng_decode32, and more advanced decoding can be done with the struct +LodePNGState and lodepng_decode. For C++, all decoding can be done with the +various lodepng::decode functions, and lodepng::State can be used for advanced +features. + +When using the LodePNGState, it uses the following fields for decoding: +*) LodePNGInfo info_png: it stores extra information about the PNG (the input) in here +*) LodePNGColorMode info_raw: here you can say what color mode of the raw image (the output) you want to get +*) LodePNGDecoderSettings decoder: you can specify a few extra settings for the decoder to use + +LodePNGInfo info_png +-------------------- + +After decoding, this contains extra information of the PNG image, except the actual +pixels, width and height because these are already gotten directly from the decoder +functions. + +It contains for example the original color type of the PNG image, text comments, +suggested background color, etc... More details about the LodePNGInfo struct are +at its declaration documentation. + +LodePNGColorMode info_raw +------------------------- + +When decoding, here you can specify which color type you want +the resulting raw image to be. If this is different from the colortype of the +PNG, then the decoder will automatically convert the result. This conversion +always works, except if you want it to convert a color PNG to grayscale or to +a palette with missing colors. + +By default, 32-bit color is used for the result. + +LodePNGDecoderSettings decoder +------------------------------ + +The settings can be used to ignore the errors created by invalid CRC and Adler32 +chunks, and to disable the decoding of tEXt chunks. + +There's also a setting color_convert, true by default. If false, no conversion +is done, the resulting data will be as it was in the PNG (after decompression) +and you'll have to puzzle the colors of the pixels together yourself using the +color type information in the LodePNGInfo. + + +5. Encoding +----------- + +Encoding converts a raw pixel buffer to a PNG compressed image. + +Most documentation on using the encoder is at its declarations in the header +above. For C, simple encoding can be done with functions such as +lodepng_encode32, and more advanced decoding can be done with the struct +LodePNGState and lodepng_encode. For C++, all encoding can be done with the +various lodepng::encode functions, and lodepng::State can be used for advanced +features. + +Like the decoder, the encoder can also give errors. However it gives less errors +since the encoder input is trusted, the decoder input (a PNG image that could +be forged by anyone) is not trusted. + +When using the LodePNGState, it uses the following fields for encoding: +*) LodePNGInfo info_png: here you specify how you want the PNG (the output) to be. +*) LodePNGColorMode info_raw: here you say what color type of the raw image (the input) has +*) LodePNGEncoderSettings encoder: you can specify a few settings for the encoder to use + +LodePNGInfo info_png +-------------------- + +When encoding, you use this the opposite way as when decoding: for encoding, +you fill in the values you want the PNG to have before encoding. By default it's +not needed to specify a color type for the PNG since it's automatically chosen, +but it's possible to choose it yourself given the right settings. + +The encoder will not always exactly match the LodePNGInfo struct you give, +it tries as close as possible. Some things are ignored by the encoder. The +encoder uses, for example, the following settings from it when applicable: +colortype and bitdepth, text chunks, time chunk, the color key, the palette, the +background color, the interlace method, unknown chunks, ... + +When encoding to a PNG with colortype 3, the encoder will generate a PLTE chunk. +If the palette contains any colors for which the alpha channel is not 255 (so +there are translucent colors in the palette), it'll add a tRNS chunk. + +LodePNGColorMode info_raw +------------------------- + +You specify the color type of the raw image that you give to the input here, +including a possible transparent color key and palette you happen to be using in +your raw image data. + +By default, 32-bit color is assumed, meaning your input has to be in RGBA +format with 4 bytes (unsigned chars) per pixel. + +LodePNGEncoderSettings encoder +------------------------------ + +The following settings are supported (some are in sub-structs): +*) auto_convert: when this option is enabled, the encoder will +automatically choose the smallest possible color mode (including color key) that +can encode the colors of all pixels without information loss. +*) btype: the block type for LZ77. 0 = uncompressed, 1 = fixed huffman tree, + 2 = dynamic huffman tree (best compression). Should be 2 for proper + compression. +*) use_lz77: whether or not to use LZ77 for compressed block types. Should be + true for proper compression. +*) windowsize: the window size used by the LZ77 encoder (1 - 32768). Has value + 2048 by default, but can be set to 32768 for better, but slow, compression. +*) force_palette: if colortype is 2 or 6, you can make the encoder write a PLTE + chunk if force_palette is true. This can used as suggested palette to convert + to by viewers that don't support more than 256 colors (if those still exist) +*) add_id: add text chunk "Encoder: LodePNG " to the image. +*) text_compression: default 1. If 1, it'll store texts as zTXt instead of tEXt chunks. + zTXt chunks use zlib compression on the text. This gives a smaller result on + large texts but a larger result on small texts (such as a single program name). + It's all tEXt or all zTXt though, there's no separate setting per text yet. + + +6. color conversions +-------------------- + +An important thing to note about LodePNG, is that the color type of the PNG, and +the color type of the raw image, are completely independent. By default, when +you decode a PNG, you get the result as a raw image in the color type you want, +no matter whether the PNG was encoded with a palette, grayscale or RGBA color. +And if you encode an image, by default LodePNG will automatically choose the PNG +color type that gives good compression based on the values of colors and amount +of colors in the image. It can be configured to let you control it instead as +well, though. + +To be able to do this, LodePNG does conversions from one color mode to another. +It can convert from almost any color type to any other color type, except the +following conversions: RGB to grayscale is not supported, and converting to a +palette when the palette doesn't have a required color is not supported. This is +not supported on purpose: this is information loss which requires a color +reduction algorithm that is beyond the scope of a PNG encoder (yes, RGB to gray +is easy, but there are multiple ways if you want to give some channels more +weight). + +By default, when decoding, you get the raw image in 32-bit RGBA or 24-bit RGB +color, no matter what color type the PNG has. And by default when encoding, +LodePNG automatically picks the best color model for the output PNG, and expects +the input image to be 32-bit RGBA or 24-bit RGB. So, unless you want to control +the color format of the images yourself, you can skip this chapter. + +6.1. PNG color types +-------------------- + +A PNG image can have many color types, ranging from 1-bit color to 64-bit color, +as well as palettized color modes. After the zlib decompression and unfiltering +in the PNG image is done, the raw pixel data will have that color type and thus +a certain amount of bits per pixel. If you want the output raw image after +decoding to have another color type, a conversion is done by LodePNG. + +The PNG specification gives the following color types: + +0: grayscale, bit depths 1, 2, 4, 8, 16 +2: RGB, bit depths 8 and 16 +3: palette, bit depths 1, 2, 4 and 8 +4: grayscale with alpha, bit depths 8 and 16 +6: RGBA, bit depths 8 and 16 + +Bit depth is the amount of bits per pixel per color channel. So the total amount +of bits per pixel is: amount of channels * bitdepth. + +6.2. color conversions +---------------------- + +As explained in the sections about the encoder and decoder, you can specify +color types and bit depths in info_png and info_raw to change the default +behaviour. + +If, when decoding, you want the raw image to be something else than the default, +you need to set the color type and bit depth you want in the LodePNGColorMode, +or the parameters colortype and bitdepth of the simple decoding function. + +If, when encoding, you use another color type than the default in the raw input +image, you need to specify its color type and bit depth in the LodePNGColorMode +of the raw image, or use the parameters colortype and bitdepth of the simple +encoding function. + +If, when encoding, you don't want LodePNG to choose the output PNG color type +but control it yourself, you need to set auto_convert in the encoder settings +to false, and specify the color type you want in the LodePNGInfo of the +encoder (including palette: it can generate a palette if auto_convert is true, +otherwise not). + +If the input and output color type differ (whether user chosen or auto chosen), +LodePNG will do a color conversion, which follows the rules below, and may +sometimes result in an error. + +To avoid some confusion: +-the decoder converts from PNG to raw image +-the encoder converts from raw image to PNG +-the colortype and bitdepth in LodePNGColorMode info_raw, are those of the raw image +-the colortype and bitdepth in the color field of LodePNGInfo info_png, are those of the PNG +-when encoding, the color type in LodePNGInfo is ignored if auto_convert + is enabled, it is automatically generated instead +-when decoding, the color type in LodePNGInfo is set by the decoder to that of the original + PNG image, but it can be ignored since the raw image has the color type you requested instead +-if the color type of the LodePNGColorMode and PNG image aren't the same, a conversion + between the color types is done if the color types are supported. If it is not + supported, an error is returned. If the types are the same, no conversion is done. +-even though some conversions aren't supported, LodePNG supports loading PNGs from any + colortype and saving PNGs to any colortype, sometimes it just requires preparing + the raw image correctly before encoding. +-both encoder and decoder use the same color converter. + +The function lodepng_convert does the color conversion. It is available in the +interface but normally isn't needed since the encoder and decoder already call +it. + +Non supported color conversions: +-color to grayscale when non-gray pixels are present: no error is thrown, but +the result will look ugly because only the red channel is taken (it assumes all +three channels are the same in this case so ignores green and blue). The reason +no error is given is to allow converting from three-channel grayscale images to +one-channel even if there are numerical imprecisions. +-anything to palette when the palette does not have an exact match for a from-color +in it: in this case an error is thrown + +Supported color conversions: +-anything to 8-bit RGB, 8-bit RGBA, 16-bit RGB, 16-bit RGBA +-any gray or gray+alpha, to gray or gray+alpha +-anything to a palette, as long as the palette has the requested colors in it +-removing alpha channel +-higher to smaller bitdepth, and vice versa + +If you want no color conversion to be done (e.g. for speed or control): +-In the encoder, you can make it save a PNG with any color type by giving the +raw color mode and LodePNGInfo the same color mode, and setting auto_convert to +false. +-In the decoder, you can make it store the pixel data in the same color type +as the PNG has, by setting the color_convert setting to false. Settings in +info_raw are then ignored. + +6.3. padding bits +----------------- + +In the PNG file format, if a less than 8-bit per pixel color type is used and the scanlines +have a bit amount that isn't a multiple of 8, then padding bits are used so that each +scanline starts at a fresh byte. But that is NOT true for the LodePNG raw input and output. +The raw input image you give to the encoder, and the raw output image you get from the decoder +will NOT have these padding bits, e.g. in the case of a 1-bit image with a width +of 7 pixels, the first pixel of the second scanline will the 8th bit of the first byte, +not the first bit of a new byte. + +6.4. A note about 16-bits per channel and endianness +---------------------------------------------------- + +LodePNG uses unsigned char arrays for 16-bit per channel colors too, just like +for any other color format. The 16-bit values are stored in big endian (most +significant byte first) in these arrays. This is the opposite order of the +little endian used by x86 CPU's. + +LodePNG always uses big endian because the PNG file format does so internally. +Conversions to other formats than PNG uses internally are not supported by +LodePNG on purpose, there are myriads of formats, including endianness of 16-bit +colors, the order in which you store R, G, B and A, and so on. Supporting and +converting to/from all that is outside the scope of LodePNG. + +This may mean that, depending on your use case, you may want to convert the big +endian output of LodePNG to little endian with a for loop. This is certainly not +always needed, many applications and libraries support big endian 16-bit colors +anyway, but it means you cannot simply cast the unsigned char* buffer to an +unsigned short* buffer on x86 CPUs. + + +7. error values +--------------- + +All functions in LodePNG that return an error code, return 0 if everything went +OK, or a non-zero code if there was an error. + +The meaning of the LodePNG error values can be retrieved with the function +lodepng_error_text: given the numerical error code, it returns a description +of the error in English as a string. + +Check the implementation of lodepng_error_text to see the meaning of each code. + +It is not recommended to use the numerical values to programmatically make +different decisions based on error types as the numbers are not guaranteed to +stay backwards compatible. They are for human consumption only. Programmatically +only 0 or non-0 matter. + + +8. chunks and PNG editing +------------------------- + +If you want to add extra chunks to a PNG you encode, or use LodePNG for a PNG +editor that should follow the rules about handling of unknown chunks, or if your +program is able to read other types of chunks than the ones handled by LodePNG, +then that's possible with the chunk functions of LodePNG. + +A PNG chunk has the following layout: + +4 bytes length +4 bytes type name +length bytes data +4 bytes CRC + +8.1. iterating through chunks +----------------------------- + +If you have a buffer containing the PNG image data, then the first chunk (the +IHDR chunk) starts at byte number 8 of that buffer. The first 8 bytes are the +signature of the PNG and are not part of a chunk. But if you start at byte 8 +then you have a chunk, and can check the following things of it. + +NOTE: none of these functions check for memory buffer boundaries. To avoid +exploits, always make sure the buffer contains all the data of the chunks. +When using lodepng_chunk_next, make sure the returned value is within the +allocated memory. + +unsigned lodepng_chunk_length(const unsigned char* chunk): + +Get the length of the chunk's data. The total chunk length is this length + 12. + +void lodepng_chunk_type(char type[5], const unsigned char* chunk): +unsigned char lodepng_chunk_type_equals(const unsigned char* chunk, const char* type): + +Get the type of the chunk or compare if it's a certain type + +unsigned char lodepng_chunk_critical(const unsigned char* chunk): +unsigned char lodepng_chunk_private(const unsigned char* chunk): +unsigned char lodepng_chunk_safetocopy(const unsigned char* chunk): + +Check if the chunk is critical in the PNG standard (only IHDR, PLTE, IDAT and IEND are). +Check if the chunk is private (public chunks are part of the standard, private ones not). +Check if the chunk is safe to copy. If it's not, then, when modifying data in a critical +chunk, unsafe to copy chunks of the old image may NOT be saved in the new one if your +program doesn't handle that type of unknown chunk. + +unsigned char* lodepng_chunk_data(unsigned char* chunk): +const unsigned char* lodepng_chunk_data_const(const unsigned char* chunk): + +Get a pointer to the start of the data of the chunk. + +unsigned lodepng_chunk_check_crc(const unsigned char* chunk): +void lodepng_chunk_generate_crc(unsigned char* chunk): + +Check if the crc is correct or generate a correct one. + +unsigned char* lodepng_chunk_next(unsigned char* chunk): +const unsigned char* lodepng_chunk_next_const(const unsigned char* chunk): + +Iterate to the next chunk. This works if you have a buffer with consecutive chunks. Note that these +functions do no boundary checking of the allocated data whatsoever, so make sure there is enough +data available in the buffer to be able to go to the next chunk. + +unsigned lodepng_chunk_append(unsigned char** out, size_t* outsize, const unsigned char* chunk): +unsigned lodepng_chunk_create(unsigned char** out, size_t* outsize, unsigned length, + const char* type, const unsigned char* data): + +These functions are used to create new chunks that are appended to the data in *out that has +length *outsize. The append function appends an existing chunk to the new data. The create +function creates a new chunk with the given parameters and appends it. Type is the 4-letter +name of the chunk. + +8.2. chunks in info_png +----------------------- + +The LodePNGInfo struct contains fields with the unknown chunk in it. It has 3 +buffers (each with size) to contain 3 types of unknown chunks: +the ones that come before the PLTE chunk, the ones that come between the PLTE +and the IDAT chunks, and the ones that come after the IDAT chunks. +It's necessary to make the distinction between these 3 cases because the PNG +standard forces to keep the ordering of unknown chunks compared to the critical +chunks, but does not force any other ordering rules. + +info_png.unknown_chunks_data[0] is the chunks before PLTE +info_png.unknown_chunks_data[1] is the chunks after PLTE, before IDAT +info_png.unknown_chunks_data[2] is the chunks after IDAT + +The chunks in these 3 buffers can be iterated through and read by using the same +way described in the previous subchapter. + +When using the decoder to decode a PNG, you can make it store all unknown chunks +if you set the option settings.remember_unknown_chunks to 1. By default, this +option is off (0). + +The encoder will always encode unknown chunks that are stored in the info_png. +If you need it to add a particular chunk that isn't known by LodePNG, you can +use lodepng_chunk_append or lodepng_chunk_create to the chunk data in +info_png.unknown_chunks_data[x]. + +Chunks that are known by LodePNG should not be added in that way. E.g. to make +LodePNG add a bKGD chunk, set background_defined to true and add the correct +parameters there instead. + + +9. compiler support +------------------- + +No libraries other than the current standard C library are needed to compile +LodePNG. For the C++ version, only the standard C++ library is needed on top. +Add the files lodepng.c(pp) and lodepng.h to your project, include +lodepng.h where needed, and your program can read/write PNG files. + +It is compatible with C90 and up, and C++03 and up. + +If performance is important, use optimization when compiling! For both the +encoder and decoder, this makes a large difference. + +Make sure that LodePNG is compiled with the same compiler of the same version +and with the same settings as the rest of the program, or the interfaces with +std::vectors and std::strings in C++ can be incompatible. + +CHAR_BITS must be 8 or higher, because LodePNG uses unsigned chars for octets. + +*) gcc and g++ + +LodePNG is developed in gcc so this compiler is natively supported. It gives no +warnings with compiler options "-Wall -Wextra -pedantic -ansi", with gcc and g++ +version 4.7.1 on Linux, 32-bit and 64-bit. + +*) Clang + +Fully supported and warning-free. + +*) Mingw + +The Mingw compiler (a port of gcc for Windows) should be fully supported by +LodePNG. + +*) Visual Studio and Visual C++ Express Edition + +LodePNG should be warning-free with warning level W4. Two warnings were disabled +with pragmas though: warning 4244 about implicit conversions, and warning 4996 +where it wants to use a non-standard function fopen_s instead of the standard C +fopen. + +Visual Studio may want "stdafx.h" files to be included in each source file and +give an error "unexpected end of file while looking for precompiled header". +This is not standard C++ and will not be added to the stock LodePNG. You can +disable it for lodepng.cpp only by right clicking it, Properties, C/C++, +Precompiled Headers, and set it to Not Using Precompiled Headers there. + +NOTE: Modern versions of VS should be fully supported, but old versions, e.g. +VS6, are not guaranteed to work. + +*) Compilers on Macintosh + +LodePNG has been reported to work both with gcc and LLVM for Macintosh, both for +C and C++. + +*) Other Compilers + +If you encounter problems on any compilers, feel free to let me know and I may +try to fix it if the compiler is modern and standards compliant. + + +10. examples +------------ + +This decoder example shows the most basic usage of LodePNG. More complex +examples can be found on the LodePNG website. + +NOTE: these examples do not support wide-character filenames, you can use an +external method to handle such files and encode or decode in-memory + +10.1. decoder C++ example +------------------------- + +#include "lodepng.h" +#include + +int main(int argc, char *argv[]) { + const char* filename = argc > 1 ? argv[1] : "test.png"; + + //load and decode + std::vector image; + unsigned width, height; + unsigned error = lodepng::decode(image, width, height, filename); + + //if there's an error, display it + if(error) std::cout << "decoder error " << error << ": " << lodepng_error_text(error) << std::endl; + + //the pixels are now in the vector "image", 4 bytes per pixel, ordered RGBARGBA..., use it as texture, draw it, ... +} + +10.2. decoder C example +----------------------- + +#include "lodepng.h" + +int main(int argc, char *argv[]) { + unsigned error; + unsigned char* image; + size_t width, height; + const char* filename = argc > 1 ? argv[1] : "test.png"; + + error = lodepng_decode32_file(&image, &width, &height, filename); + + if(error) printf("decoder error %u: %s\n", error, lodepng_error_text(error)); + + / * use image here * / + + free(image); + return 0; +} + +11. state settings reference +---------------------------- + +A quick reference of some settings to set on the LodePNGState + +For decoding: + +state.decoder.zlibsettings.ignore_adler32: ignore ADLER32 checksums +state.decoder.zlibsettings.custom_...: use custom inflate function +state.decoder.ignore_crc: ignore CRC checksums +state.decoder.ignore_critical: ignore unknown critical chunks +state.decoder.ignore_end: ignore missing IEND chunk. May fail if this corruption causes other errors +state.decoder.color_convert: convert internal PNG color to chosen one +state.decoder.read_text_chunks: whether to read in text metadata chunks +state.decoder.remember_unknown_chunks: whether to read in unknown chunks +state.info_raw.colortype: desired color type for decoded image +state.info_raw.bitdepth: desired bit depth for decoded image +state.info_raw....: more color settings, see struct LodePNGColorMode +state.info_png....: no settings for decoder but ouput, see struct LodePNGInfo + +For encoding: + +state.encoder.zlibsettings.btype: disable compression by setting it to 0 +state.encoder.zlibsettings.use_lz77: use LZ77 in compression +state.encoder.zlibsettings.windowsize: tweak LZ77 windowsize +state.encoder.zlibsettings.minmatch: tweak min LZ77 length to match +state.encoder.zlibsettings.nicematch: tweak LZ77 match where to stop searching +state.encoder.zlibsettings.lazymatching: try one more LZ77 matching +state.encoder.zlibsettings.custom_...: use custom deflate function +state.encoder.auto_convert: choose optimal PNG color type, if 0 uses info_png +state.encoder.filter_palette_zero: PNG filter strategy for palette +state.encoder.filter_strategy: PNG filter strategy to encode with +state.encoder.force_palette: add palette even if not encoding to one +state.encoder.add_id: add LodePNG identifier and version as a text chunk +state.encoder.text_compression: use compressed text chunks for metadata +state.info_raw.colortype: color type of raw input image you provide +state.info_raw.bitdepth: bit depth of raw input image you provide +state.info_raw: more color settings, see struct LodePNGColorMode +state.info_png.color.colortype: desired color type if auto_convert is false +state.info_png.color.bitdepth: desired bit depth if auto_convert is false +state.info_png.color....: more color settings, see struct LodePNGColorMode +state.info_png....: more PNG related settings, see struct LodePNGInfo + + +12. changes +----------- + +The version number of LodePNG is the date of the change given in the format +yyyymmdd. + +Some changes aren't backwards compatible. Those are indicated with a (!) +symbol. + +Not all changes are listed here, the commit history in github lists more: +https://github.com/lvandeve/lodepng + +*) 10 apr 2023: faster CRC32 implementation, but with larger lookup table. +*) 13 jun 2022: added support for the sBIT chunk. +*) 09 jan 2022: minor decoder speed improvements. +*) 27 jun 2021: added warnings that file reading/writing functions don't support + wide-character filenames (support for this is not planned, opening files is + not the core part of PNG decoding/decoding and is platform dependent). +*) 17 okt 2020: prevent decoding too large text/icc chunks by default. +*) 06 mar 2020: simplified some of the dynamic memory allocations. +*) 12 jan 2020: (!) added 'end' argument to lodepng_chunk_next to allow correct + overflow checks. +*) 14 aug 2019: around 25% faster decoding thanks to huffman lookup tables. +*) 15 jun 2019: (!) auto_choose_color API changed (for bugfix: don't use palette + if gray ICC profile) and non-ICC LodePNGColorProfile renamed to + LodePNGColorStats. +*) 30 dec 2018: code style changes only: removed newlines before opening braces. +*) 10 sep 2018: added way to inspect metadata chunks without full decoding. +*) 19 aug 2018: (!) fixed color mode bKGD is encoded with and made it use + palette index in case of palette. +*) 10 aug 2018: (!) added support for gAMA, cHRM, sRGB and iCCP chunks. This + change is backwards compatible unless you relied on unknown_chunks for those. +*) 11 jun 2018: less restrictive check for pixel size integer overflow +*) 14 jan 2018: allow optionally ignoring a few more recoverable errors +*) 17 sep 2017: fix memory leak for some encoder input error cases +*) 27 nov 2016: grey+alpha auto color model detection bugfix +*) 18 apr 2016: Changed qsort to custom stable sort (for platforms w/o qsort). +*) 09 apr 2016: Fixed colorkey usage detection, and better file loading (within + the limits of pure C90). +*) 08 dec 2015: Made load_file function return error if file can't be opened. +*) 24 okt 2015: Bugfix with decoding to palette output. +*) 18 apr 2015: Boundary PM instead of just package-merge for faster encoding. +*) 24 aug 2014: Moved to github +*) 23 aug 2014: Reduced needless memory usage of decoder. +*) 28 jun 2014: Removed fix_png setting, always support palette OOB for + simplicity. Made ColorProfile public. +*) 09 jun 2014: Faster encoder by fixing hash bug and more zeros optimization. +*) 22 dec 2013: Power of two windowsize required for optimization. +*) 15 apr 2013: Fixed bug with LAC_ALPHA and color key. +*) 25 mar 2013: Added an optional feature to ignore some PNG errors (fix_png). +*) 11 mar 2013: (!) Bugfix with custom free. Changed from "my" to "lodepng_" + prefix for the custom allocators and made it possible with a new #define to + use custom ones in your project without needing to change lodepng's code. +*) 28 jan 2013: Bugfix with color key. +*) 27 okt 2012: Tweaks in text chunk keyword length error handling. +*) 8 okt 2012: (!) Added new filter strategy (entropy) and new auto color mode. + (no palette). Better deflate tree encoding. New compression tweak settings. + Faster color conversions while decoding. Some internal cleanups. +*) 23 sep 2012: Reduced warnings in Visual Studio a little bit. +*) 1 sep 2012: (!) Removed #define's for giving custom (de)compression functions + and made it work with function pointers instead. +*) 23 jun 2012: Added more filter strategies. Made it easier to use custom alloc + and free functions and toggle #defines from compiler flags. Small fixes. +*) 6 may 2012: (!) Made plugging in custom zlib/deflate functions more flexible. +*) 22 apr 2012: (!) Made interface more consistent, renaming a lot. Removed + redundant C++ codec classes. Reduced amount of structs. Everything changed, + but it is cleaner now imho and functionality remains the same. Also fixed + several bugs and shrunk the implementation code. Made new samples. +*) 6 nov 2011: (!) By default, the encoder now automatically chooses the best + PNG color model and bit depth, based on the amount and type of colors of the + raw image. For this, autoLeaveOutAlphaChannel replaced by auto_choose_color. +*) 9 okt 2011: simpler hash chain implementation for the encoder. +*) 8 sep 2011: lz77 encoder lazy matching instead of greedy matching. +*) 23 aug 2011: tweaked the zlib compression parameters after benchmarking. + A bug with the PNG filtertype heuristic was fixed, so that it chooses much + better ones (it's quite significant). A setting to do an experimental, slow, + brute force search for PNG filter types is added. +*) 17 aug 2011: (!) changed some C zlib related function names. +*) 16 aug 2011: made the code less wide (max 120 characters per line). +*) 17 apr 2011: code cleanup. Bugfixes. Convert low to 16-bit per sample colors. +*) 21 feb 2011: fixed compiling for C90. Fixed compiling with sections disabled. +*) 11 dec 2010: encoding is made faster, based on suggestion by Peter Eastman + to optimize long sequences of zeros. +*) 13 nov 2010: added LodePNG_InfoColor_hasPaletteAlpha and + LodePNG_InfoColor_canHaveAlpha functions for convenience. +*) 7 nov 2010: added LodePNG_error_text function to get error code description. +*) 30 okt 2010: made decoding slightly faster +*) 26 okt 2010: (!) changed some C function and struct names (more consistent). + Reorganized the documentation and the declaration order in the header. +*) 08 aug 2010: only changed some comments and external samples. +*) 05 jul 2010: fixed bug thanks to warnings in the new gcc version. +*) 14 mar 2010: fixed bug where too much memory was allocated for char buffers. +*) 02 sep 2008: fixed bug where it could create empty tree that linux apps could + read by ignoring the problem but windows apps couldn't. +*) 06 jun 2008: added more error checks for out of memory cases. +*) 26 apr 2008: added a few more checks here and there to ensure more safety. +*) 06 mar 2008: crash with encoding of strings fixed +*) 02 feb 2008: support for international text chunks added (iTXt) +*) 23 jan 2008: small cleanups, and #defines to divide code in sections +*) 20 jan 2008: support for unknown chunks allowing using LodePNG for an editor. +*) 18 jan 2008: support for tIME and pHYs chunks added to encoder and decoder. +*) 17 jan 2008: ability to encode and decode compressed zTXt chunks added + Also various fixes, such as in the deflate and the padding bits code. +*) 13 jan 2008: Added ability to encode Adam7-interlaced images. Improved + filtering code of encoder. +*) 07 jan 2008: (!) changed LodePNG to use ISO C90 instead of C++. A + C++ wrapper around this provides an interface almost identical to before. + Having LodePNG be pure ISO C90 makes it more portable. The C and C++ code + are together in these files but it works both for C and C++ compilers. +*) 29 dec 2007: (!) changed most integer types to unsigned int + other tweaks +*) 30 aug 2007: bug fixed which makes this Borland C++ compatible +*) 09 aug 2007: some VS2005 warnings removed again +*) 21 jul 2007: deflate code placed in new namespace separate from zlib code +*) 08 jun 2007: fixed bug with 2- and 4-bit color, and small interlaced images +*) 04 jun 2007: improved support for Visual Studio 2005: crash with accessing + invalid std::vector element [0] fixed, and level 3 and 4 warnings removed +*) 02 jun 2007: made the encoder add a tag with version by default +*) 27 may 2007: zlib and png code separated (but still in the same file), + simple encoder/decoder functions added for more simple usage cases +*) 19 may 2007: minor fixes, some code cleaning, new error added (error 69), + moved some examples from here to lodepng_examples.cpp +*) 12 may 2007: palette decoding bug fixed +*) 24 apr 2007: changed the license from BSD to the zlib license +*) 11 mar 2007: very simple addition: ability to encode bKGD chunks. +*) 04 mar 2007: (!) tEXt chunk related fixes, and support for encoding + palettized PNG images. Plus little interface change with palette and texts. +*) 03 mar 2007: Made it encode dynamic Huffman shorter with repeat codes. + Fixed a bug where the end code of a block had length 0 in the Huffman tree. +*) 26 feb 2007: Huffman compression with dynamic trees (BTYPE 2) now implemented + and supported by the encoder, resulting in smaller PNGs at the output. +*) 27 jan 2007: Made the Adler-32 test faster so that a timewaste is gone. +*) 24 jan 2007: gave encoder an error interface. Added color conversion from any + greyscale type to 8-bit greyscale with or without alpha. +*) 21 jan 2007: (!) Totally changed the interface. It allows more color types + to convert to and is more uniform. See the manual for how it works now. +*) 07 jan 2007: Some cleanup & fixes, and a few changes over the last days: + encode/decode custom tEXt chunks, separate classes for zlib & deflate, and + at last made the decoder give errors for incorrect Adler32 or Crc. +*) 01 jan 2007: Fixed bug with encoding PNGs with less than 8 bits per channel. +*) 29 dec 2006: Added support for encoding images without alpha channel, and + cleaned out code as well as making certain parts faster. +*) 28 dec 2006: Added "Settings" to the encoder. +*) 26 dec 2006: The encoder now does LZ77 encoding and produces much smaller files now. + Removed some code duplication in the decoder. Fixed little bug in an example. +*) 09 dec 2006: (!) Placed output parameters of public functions as first parameter. + Fixed a bug of the decoder with 16-bit per color. +*) 15 okt 2006: Changed documentation structure +*) 09 okt 2006: Encoder class added. It encodes a valid PNG image from the + given image buffer, however for now it's not compressed. +*) 08 sep 2006: (!) Changed to interface with a Decoder class +*) 30 jul 2006: (!) LodePNG_InfoPng , width and height are now retrieved in different + way. Renamed decodePNG to decodePNGGeneric. +*) 29 jul 2006: (!) Changed the interface: image info is now returned as a + struct of type LodePNG::LodePNG_Info, instead of a vector, which was a bit clumsy. +*) 28 jul 2006: Cleaned the code and added new error checks. + Corrected terminology "deflate" into "inflate". +*) 23 jun 2006: Added SDL example in the documentation in the header, this + example allows easy debugging by displaying the PNG and its transparency. +*) 22 jun 2006: (!) Changed way to obtain error value. Added + loadFile function for convenience. Made decodePNG32 faster. +*) 21 jun 2006: (!) Changed type of info vector to unsigned. + Changed position of palette in info vector. Fixed an important bug that + happened on PNGs with an uncompressed block. +*) 16 jun 2006: Internally changed unsigned into unsigned where + needed, and performed some optimizations. +*) 07 jun 2006: (!) Renamed functions to decodePNG and placed them + in LodePNG namespace. Changed the order of the parameters. Rewrote the + documentation in the header. Renamed files to lodepng.cpp and lodepng.h +*) 22 apr 2006: Optimized and improved some code +*) 07 sep 2005: (!) Changed to std::vector interface +*) 12 aug 2005: Initial release (C++, decoder only) + + +13. contact information +----------------------- + +Feel free to contact me with suggestions, problems, comments, ... concerning +LodePNG. If you encounter a PNG image that doesn't work properly with this +decoder, feel free to send it and I'll use it to find and fix the problem. + +My email address is (puzzle the account and domain together with an @ symbol): +Domain: gmail dot com. +Account: lode dot vandevenne. + + +Copyright (c) 2005-2022 Lode Vandevenne +*/