forked from jengelh/SDL2
53 lines
2.0 KiB
Diff
53 lines
2.0 KiB
Diff
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# https://bugzilla.libsdl.org/show_bug.cgi?id=3466
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# commits 5184186d4366 and fbf9b0e3589a
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#
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diff -udpr SDL2-2.0.5.orig/src/video/SDL_blit_N.c SDL2-2.0.5/src/video/SDL_blit_N.c
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--- SDL2-2.0.5.orig/src/video/SDL_blit_N.c 2016-10-20 05:56:26.000000000 +0200
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+++ SDL2-2.0.5/src/video/SDL_blit_N.c 2016-10-23 09:58:57.319897519 +0200
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@@ -118,12 +118,6 @@ calc_swizzle32(const SDL_PixelFormat * s
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16, 8, 0, 24,
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0, NULL
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};
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- if (!srcfmt) {
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- srcfmt = &default_pixel_format;
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- }
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- if (!dstfmt) {
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- dstfmt = &default_pixel_format;
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- }
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const vector unsigned char plus = VECUINT8_LITERAL(0x00, 0x00, 0x00, 0x00,
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0x04, 0x04, 0x04, 0x04,
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0x08, 0x08, 0x08, 0x08,
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@@ -131,11 +125,20 @@ calc_swizzle32(const SDL_PixelFormat * s
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0x0C);
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vector unsigned char vswiz;
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vector unsigned int srcvec;
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+ Uint32 rmask, gmask, bmask, amask;
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+
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+ if (!srcfmt) {
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+ srcfmt = &default_pixel_format;
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+ }
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+ if (!dstfmt) {
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+ dstfmt = &default_pixel_format;
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+ }
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+
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#define RESHIFT(X) (3 - ((X) >> 3))
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- Uint32 rmask = RESHIFT(srcfmt->Rshift) << (dstfmt->Rshift);
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- Uint32 gmask = RESHIFT(srcfmt->Gshift) << (dstfmt->Gshift);
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- Uint32 bmask = RESHIFT(srcfmt->Bshift) << (dstfmt->Bshift);
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- Uint32 amask;
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+ rmask = RESHIFT(srcfmt->Rshift) << (dstfmt->Rshift);
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+ gmask = RESHIFT(srcfmt->Gshift) << (dstfmt->Gshift);
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+ bmask = RESHIFT(srcfmt->Bshift) << (dstfmt->Bshift);
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+
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/* Use zero for alpha if either surface doesn't have alpha */
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if (dstfmt->Amask) {
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amask =
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@@ -147,6 +150,7 @@ calc_swizzle32(const SDL_PixelFormat * s
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0xFFFFFFFF);
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}
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#undef RESHIFT
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+
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((unsigned int *) (char *) &srcvec)[0] = (rmask | gmask | bmask | amask);
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vswiz = vec_add(plus, (vector unsigned char) vec_splat(srcvec, 0));
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return (vswiz);
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