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cache hasAlpha for ImagingUnsharpMask

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This commit is contained in:
homm 2014-10-08 17:40:33 +04:00
parent e56aed1a95
commit bef7e1dce8
1 changed files with 6 additions and 2 deletions
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8
libImaging/UnsharpMask.c
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@ -293,6 +293,7 @@ ImagingUnsharpMask(Imaging im, Imaging imOut, float radius, int percent,
int channel = 0;
int channels = 0;
int padding = 0;
int hasAlpha = 0;
int x = 0;
int y = 0;
@ -337,6 +338,10 @@ ImagingUnsharpMask(Imaging im, Imaging imOut, float radius, int percent,
ImagingSectionEnter(&cookie);
if (strcmp(im->mode, "RGBX") == 0 || strcmp(im->mode, "RGBA") == 0) {
hasAlpha = 1;
}
for (y = 0; y < im->ysize; y++) {
if (channels == 1) {
lineIn8 = im->image8[y];
@ -385,8 +390,7 @@ ImagingUnsharpMask(Imaging im, Imaging imOut, float radius, int percent,
(channel * 8);
}
}
if (strcmp(im->mode, "RGBX") == 0
|| strcmp(im->mode, "RGBA") == 0) {
if (hasAlpha) {
/* preserve the alpha channel
this may not work for little-endian systems, fix it! */
newPixel =