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fix lcdGetPixel_SDL reading wrong pixels

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Multiply by width was missing in GetPixel, now using same code as in SetPixel.
Current bug causes Graphics.scroll(x, y) to produce very strange patterns, after fix it works as expected.
This commit is contained in:
fanoush 2019-06-25 14:18:41 +02:00
parent 7ef0e79773
commit c0c1b20541
1 changed files with 1 additions and 1 deletions
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2
libs/graphics/lcd_sdl.c
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@ -27,7 +27,7 @@ unsigned int lcdGetPixel_SDL(JsGraphics *gfx, short x, short y) {
if (!screen) return 0;
if(SDL_MUSTLOCK(screen))
if(SDL_LockSurface(screen) < 0) return 0;
unsigned int *pixmem32 = ((unsigned int*)screen->pixels) + y + x;
unsigned int *pixmem32 = ((unsigned int*)screen->pixels) + y*gfx->data.width + x;
unsigned int col = *pixmem32;
if(SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen);
return col;