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Began implementing a function to composite two bitmap views before I realized pushContext and popContext probably do what I need instead

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Rezmason
2022-06-06 07:47:27 -07:00
parent 8df808ea76
commit 6a3430d862
1 changed files with 17 additions and 0 deletions
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17
playdate/matrix_c/main.c
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@@ -76,6 +76,23 @@ static void freeBitmapView(BitmapView *bv)
pd->system->realloc(bv, 0); pd->system->realloc(bv, 0);
} }
static void composite(BitmapView *src, BitmapView *dest, int srcX, int srcY, int width, int height, int destX, int destY)
{
if (height < 0) { srcY -= height; destY -= height; height = -height; }
if (srcY < 0) { height += srcY; destY += srcY; srcY = 0; }
if (destY < 0) { height += destY; destY += destY; destY = 0; }
if (height > src->height - srcY) { height = src->height - srcY; }
if (height > dest->height - destY) { height = dest->height - destY; }
if (height == 0) return;
if (width < 0) { srcX -= width; destX -= width; width = -width; }
if (srcX < 0) { width += srcX; destX += srcX; srcX = 0; }
if (destX < 0) { width += destX; destX += destX; destX = 0; }
if (width > src->width - srcX) { width = src->width - srcX; }
if (width > dest->width - destX) { width = dest->width - destX; }
if (width == 0) return;
}
static void logBitmapViewToConsole(BitmapView *bv) static void logBitmapViewToConsole(BitmapView *bv)
{ {
pd->system->logToConsole("bitmap: %i x %i %s", bv->width, bv->height, bv->hasMask ? "transparent" : ""); pd->system->logToConsole("bitmap: %i x %i %s", bv->width, bv->height, bv->hasMask ? "transparent" : "");