1290         SDL_memcpy(tmp, dst, length);

  1290         SDL_memcpy(tmp, dst, length);

  1291         SDL_memcpy(dst, src, length);

  1291         SDL_memcpy(dst, src, length);

  1292         SDL_memcpy(src, tmp, length);

  1292         SDL_memcpy(src, tmp, length);

  1293     }

  1293     }

  1294     SDL_stack_free(tmp);

  1294     SDL_stack_free(tmp);

  1295 }

  1297 }

  1296 

  1298 

  1297 static int

  1299 static int

  1298 GL_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,

  1300 GL_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,

  1299                      Uint32 pixel_format, const void * pixels, int pitch)

  1301                      Uint32 pixel_format, const void * pixels, int pitch)

  1319     data->glPixelStorei(GL_UNPACK_ROW_LENGTH,

  1321     data->glPixelStorei(GL_UNPACK_ROW_LENGTH,

  1320                         (pitch / bytes_per_pixel(pixel_format)));

  1322                         (pitch / bytes_per_pixel(pixel_format)));

  1321 

  1323 

  1322     data->glReadPixels(rect->x, rect->y+rect->h-1, rect->w, rect->h,

  1324     data->glReadPixels(rect->x, rect->y+rect->h-1, rect->w, rect->h,

  1323                        format, type, pixels);

  1325                        format, type, pixels);

  1324 }

  1328 }

  1325 

  1329 

  1326 static void

  1330 static void

  1327 GL_RenderPresent(SDL_Renderer * renderer)

  1331 GL_RenderPresent(SDL_Renderer * renderer)

  1328 {

  1332 {