m_gl_context = SDL_GL_CreateContext(m_window);
- glClearColor(1.f,1.f,1.f,1.f);
- glClear(GL_COLOR_BUFFER_BIT);
+ ResizeViewport(800, 600);
+
+ Clear();
Present();
- ResizeViewport(800, 600);
}
SDL_Quit();
}
+ void Screen::Clear(float r, float g, float b, float a)
+ {
+ glClearColor(r,g,b,a);
+ glClear(GL_COLOR_BUFFER_BIT);
+ }
+
void Screen::ResizeViewport(int width, int height)
{
glViewport(0, 0, width, height);
if (pixels == NULL)
Fatal("Failed to allocate %d x %d x 4 = %d pixel array", w, h, w*h*4);
- glReadBuffer(GL_FRONT);
- glPixelStorei(GL_PACK_ALIGNMENT, 1);
-
- glReadPixels(0,0,w, h, GL_BGRA, GL_UNSIGNED_BYTE, pixels);
+
+ for (int y = 0; y < h; ++y)
+ {
+ glReadPixels(0,h-y-1,w, 1, GL_RGBA, GL_UNSIGNED_BYTE, &pixels[y*w*4]);
+ }
- SDL_Surface * surf = SDL_CreateRGBSurfaceFrom(pixels, w, h, 8*4, w*4, 0,0,0,0);
+ #if SDL_BYTEORDER == SDL_LIL_ENDIAN
+ SDL_Surface * surf = SDL_CreateRGBSurfaceFrom(pixels, w, h, 8*4, w*4, 0x000000ff,0x0000ff00,0x00ff0000,0xff000000);
+ #else
+ SDL_Surface * surf = SDL_CreateRGBSurfaceFrom(pixels, w, h, 8*4, w*4, 0xff000000,0x00ff0000,0x0000ff00,0x000000ff);
+ #endif
if (surf == NULL)
Fatal("Failed to create SDL_Surface from pixel data - %s", SDL_GetError());