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Fix wrong access and simplify

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This commit is contained in:
Sylvain Becker 2019-02-08 17:15:30 +01:00
parent 5ed30f844d
commit 604b44f20f
1 changed files with 5 additions and 15 deletions
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20
src/video/SDL_blit_N.c
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@ -2178,27 +2178,17 @@ get_permutation(SDL_PixelFormat *srcfmt, SDL_PixelFormat *dstfmt,
b = (Pixel >> 16) & 0xFF; b = (Pixel >> 16) & 0xFF;
a = (Pixel >> 24) & 0xFF; a = (Pixel >> 24) & 0xFF;
{
int val;
for (val = 0; val <= 3; val++) {
if (r != val && g != val && b != val && a != val) {
missing = val;
break;
}
}
}
if (r == 0) { if (r == 0) {
r = missing; r = 1;
missing = 0; missing = 0;
} else if (g == 0) { } else if (g == 0) {
g = missing; g = 1;
missing = 1; missing = 1;
} else if (b == 0) { } else if (b == 0) {
b = missing; b = 1;
missing = 2; missing = 2;
} else if (a == 0) { } else if (a == 0) {
a = missing; a = 1;
missing = 3; missing = 3;
} }
@ -2207,7 +2197,7 @@ get_permutation(SDL_PixelFormat *srcfmt, SDL_PixelFormat *dstfmt,
*_b = b - 1; *_b = b - 1;
*_a = a - 1; *_a = a - 1;
if (missing) { if (_missing) {
*_missing = missing; *_missing = missing;
} }
return; return;