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#include "graphics/surface-keycolored.h"
namespace Graphics {
void SurfaceKeyColored::blit(Surface *surf_src, int16 x, int16 y, OverlayColor transparent) {
if (bytesPerPixel != sizeof(OverlayColor) || surf_src->bytesPerPixel != sizeof(OverlayColor)) return ;
const OverlayColor *src = (const OverlayColor*)surf_src->pixels;
int blitW = surf_src->w;
int blitH = surf_src->h;
// clip co-ordinates
if (x < 0) {
blitW += x;
src -= x;
x = 0;
}
if (y < 0) {
blitH += y;
src -= y * surf_src->w;
y = 0;
}
if (blitW > w - x) blitW = w - x;
if (blitH > h - y) blitH = h - y;
if (blitW <= 0 || blitH <= 0)
return;
OverlayColor *dst = (OverlayColor*) getBasePtr(x, y);
int dstAdd = w - blitW;
int srcAdd = surf_src->w - blitW;
for (int i = 0; i < blitH; ++i) {
for (int j = 0; j < blitW; ++j, ++dst, ++src) {
OverlayColor col = *src;
if (col != transparent)
*dst = col;
}
dst += dstAdd;
src += srcAdd;
}
}
} // end of namespace Graphics
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