c61f216d37
- We just add to a frame of quads which the renderer deals with in gfx_update - draw_quad, draw_rect, draw_rect_rotated - Currently just implemented with legacy opengl, so we can't do custom shading - Added third party code from lodepng so we can load pngs without any other dependencies (no C includes) - ALLOCATOR_REALLOCATE - Basic Vector2, Vector3, Vector4 stuff, and some math utilities - Added <math.h> dependency for now. - Graphics renderer frontend layer - Naive get_random() implementation
76 lines
No EOL
1.8 KiB
C
76 lines
No EOL
1.8 KiB
C
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// #Temporary #Cleanup
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// #Temporary #Cleanup
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// #Temporary #Cleanup
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// #Temporary #Cleanup
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#include "GL/gl.h"
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HDC hdc;
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typedef BOOL (APIENTRY *PFNWGLSWAPINTERVALEXTPROC) (int interval);
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void gfx_init() {
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// #Temporary #Cleanup
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// #Temporary #Cleanup
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// #Temporary #Cleanup
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// #Temporary #Cleanup
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PIXELFORMATDESCRIPTOR pfd = {
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sizeof(PIXELFORMATDESCRIPTOR),
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1,
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PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
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PFD_TYPE_RGBA,
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32,
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0, 0, 0, 0, 0, 0,
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0, 0,
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0, 0, 0, 0, 0,
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24,
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8,
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0,
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PFD_MAIN_PLANE,
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0,
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0, 0, 0
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};
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hdc = GetDC(window._os_handle);
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int pixelFormat = ChoosePixelFormat(hdc, &pfd);
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SetPixelFormat(hdc, pixelFormat, &pfd);
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HGLRC hglrc = wglCreateContext(hdc);
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wglMakeCurrent(hdc, hglrc);
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PFNWGLSWAPINTERVALEXTPROC wglSwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC) wglGetProcAddress("wglSwapIntervalEXT");
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assert(wglSwapIntervalEXT, "Could not load wglSwapIntervalEXT");
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wglSwapIntervalEXT(0);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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}
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void gfx_update() {
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Draw_Quad_Block *block = &draw_frame.first_block;
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glBegin(GL_QUADS);
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while (block != 0) {
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for (u64 i = 0; i < block->num_quads; i++) {
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Draw_Quad q = block->quad_buffer[i];
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glColor4f(q.color.r, q.color.g, q.color.b, q.color.a);
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glVertex2f(v2_expand(q.bottom_left));
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glVertex2f(v2_expand(q.top_left));
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glVertex2f(v2_expand(q.top_right));
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glVertex2f(v2_expand(q.bottom_right));
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}
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block = block->next;
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}
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glEnd();
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SwapBuffers(hdc);
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glClearColor(window.clear_color.r, window.clear_color.g, window.clear_color.b, window.clear_color.a);
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glClear(GL_COLOR_BUFFER_BIT);
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glViewport(0, 0, window.width, window.height);
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draw_frame = ZERO(Draw_Frame);
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} |