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Only update texture on damage.

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This commit is contained in:
Peter
2021-10-22 07:34:03 +02:00
committed by Nick Briggs
parent 6f0ca7ad1c
commit 380416fa2d
2 changed files with 24 additions and 18 deletions
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30
src/sdl.c
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@@ -207,8 +207,12 @@ void set_pixel(SDL_Surface *surface, int x, int y, Uint32 pixel)
}
int should_update_texture = 0;
void sdl_notify_damage(int x, int y, int w, int h) {
should_update_texture = 1;
}
void sdl_bitblt_to_screen(int _x, int _y, int _w, int _h) {
// printf("bitblting\n");
//printf("bitblting\n");
int before = SDL_GetTicks();
int width = sdl_displaywidth;
int height = sdl_displayheight;
@@ -234,7 +238,7 @@ void sdl_bitblt_to_screen(int _x, int _y, int _w, int _h) {
}
}
}
should_update_texture = 1;
//should_update_texture = 1;
int after = SDL_GetTicks();
// printf("bitblting took %dms\n", after - before);
/* before = SDL_GetTicks(); */
@@ -414,27 +418,25 @@ void process_SDLevents() {
}
}
// handle_keyboard();
/* sdl_bitblt_to_screen(); */
// SDL_UpdateTexture(sdl_texture, NULL, buffer, sdl_displaywidth * sizeof(Uint32));
int before = 0;
int after = 0;
/* if(should_update_texture) { */
/* before = SDL_GetTicks(); */
/* SDL_UpdateTexture(sdl_texture, NULL, buffer, sdl_displaywidth * sizeof(Uint32)); */
/* after = SDL_GetTicks(); */
/* should_update_texture = 0; */
/* } */
// printf("UpdateTexture took %dms\n", after - before);
if(should_update_texture) {
before = SDL_GetTicks();
sdl_bitblt_to_screen(0, 0, sdl_displaywidth, sdl_displayheight);
SDL_UpdateTexture(sdl_texture, NULL, buffer, sdl_displaywidth * sizeof(Uint32));
after = SDL_GetTicks();
// printf("UpdateTexture took %dms\n", after - before);
should_update_texture = 0;
}
int this_draw = SDL_GetTicks();
before = SDL_GetTicks();
// printf("processing events took %dms\n", before - process_events_time);
if(this_draw - last_draw > 16) {
before = SDL_GetTicks();
SDL_UpdateTexture(sdl_texture, NULL, buffer, sdl_displaywidth * sizeof(Uint32));
/* SDL_UpdateTexture(sdl_texture, NULL, buffer, sdl_displaywidth * sizeof(Uint32)); */
after = SDL_GetTicks();
should_update_texture = 0;
// should_update_texture = 0;
sdl_bitblt_to_screen(0, 0, sdl_displaywidth, sdl_displayheight);
SDL_RenderClear(sdl_renderer);
SDL_Rect r;
r.x = 0;