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improve SDL performance by only flipping when idle

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This commit is contained in:
Gordon Williams 2014-03-19 10:12:16 +00:00
parent 7f28e328a4
commit 23a8889f9b
1 changed files with 6 additions and 1 deletions
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7
libs/graphics/lcd_sdl.c
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@ -21,6 +21,7 @@
#define DEPTH 32
SDL_Surface *screen = 0;
bool needsFlip = false;
unsigned int lcdGetPixel_SDL(JsGraphics *gfx, short x, short y) {
if (!screen) return 0;
@ -43,7 +44,7 @@ void lcdSetPixel_SDL(JsGraphics *gfx, short x, short y, unsigned int col) {
unsigned int *pixmem32 = ((unsigned int*)screen->pixels) + y*gfx->data.width + x;
*pixmem32 = col;
if(SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen);
SDL_Flip(screen);
needsFlip = true;
}
void lcdInit_SDL(JsGraphics *gfx) {
@ -60,6 +61,10 @@ void lcdInit_SDL(JsGraphics *gfx) {
}
void lcdIdle_SDL() {
if (needsFlip) {
needsFlip = false;
SDL_Flip(screen);
}
}
void lcdSetCallbacks_SDL(JsGraphics *gfx) {