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triangle: don't read destination pixel when you're going to discard it anyways

This commit is contained in:
Anonymous Maarten 2023-10-05 13:40:09 +02:00
parent d5ba5bb05f
commit 36eb4845b5
1 changed files with 13 additions and 8 deletions
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21
src/render/software/SDL_triangle.c
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@ -789,15 +789,20 @@ static void SDL_BlitTriangle_Slow(SDL_BlitInfo *info,
continue;
}
}
if (FORMAT_HAS_ALPHA(dstfmt_val)) {
DISEMBLE_RGBA(dst, dstbpp, dst_fmt, dstpixel, dstR, dstG, dstB, dstA);
} else if (FORMAT_HAS_NO_ALPHA(dstfmt_val)) {
DISEMBLE_RGB(dst, dstbpp, dst_fmt, dstpixel, dstR, dstG, dstB);
dstA = 0xFF;
if ((flags & (SDL_COPY_BLEND | SDL_COPY_ADD | SDL_COPY_MOD | SDL_COPY_MUL))) {
if (FORMAT_HAS_ALPHA(dstfmt_val)) {
DISEMBLE_RGBA(dst, dstbpp, dst_fmt, dstpixel, dstR, dstG, dstB, dstA);
} else if (FORMAT_HAS_NO_ALPHA(dstfmt_val)) {
DISEMBLE_RGB(dst, dstbpp, dst_fmt, dstpixel, dstR, dstG, dstB);
dstA = 0xFF;
} else {
/* SDL_PIXELFORMAT_ARGB2101010 */
dstpixel = *((Uint32 *) (dst));
RGBA_FROM_ARGB2101010(dstpixel, dstR, dstG, dstB, dstA);
}
} else {
/* SDL_PIXELFORMAT_ARGB2101010 */
dstpixel = *((Uint32 *)(dst));
RGBA_FROM_ARGB2101010(dstpixel, dstR, dstG, dstB, dstA);
/* don't care */
dstR = dstG = dstB = dstA = 0;
}
if (!is_uniform) {