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fix blur for RGBA & RGBX

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This commit is contained in:
homm 2014-10-06 21:27:08 +04:00
parent 626acf705f
commit 05c99131e0
1 changed files with 8 additions and 3 deletions
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11
libImaging/UnsharpMask.c
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@ -79,6 +79,7 @@ gblur(Imaging im, Imaging imOut, float floatRadius, int channels, int padding)
int radius = 0; int radius = 0;
float remainder = 0.0; float remainder = 0.0;
int hasAlpha = 0;
int i; int i;
@ -189,6 +190,10 @@ gblur(Imaging im, Imaging imOut, float floatRadius, int channels, int padding)
} }
} }
if (strcmp(im->mode, "RGBX") == 0 || strcmp(im->mode, "RGBA") == 0) {
hasAlpha = 1;
}
/* perform a blur on each column in the buffer, and place in the /* perform a blur on each column in the buffer, and place in the
output image */ output image */
for (x = 0; x < im->xsize; x++) { for (x = 0; x < im->xsize; x++) {
@ -204,6 +209,7 @@ gblur(Imaging im, Imaging imOut, float floatRadius, int channels, int padding)
offset = -y; offset = -y;
else if (y + offset >= im->ysize) else if (y + offset >= im->ysize)
offset = im->ysize - y - 1; offset = im->ysize - y - 1;
/* add (neighbor pixel value * maskData[pix]) to the current /* add (neighbor pixel value * maskData[pix]) to the current
pixel value */ pixel value */
for (channel = 0; channel < channels; channel++) { for (channel = 0; channel < channels; channel++) {
@ -215,9 +221,8 @@ gblur(Imaging im, Imaging imOut, float floatRadius, int channels, int padding)
} }
/* if the image is RGBX or RGBA, copy the 4th channel data to /* if the image is RGBX or RGBA, copy the 4th channel data to
newPixel, so it gets put in imOut */ newPixel, so it gets put in imOut */
if (strcmp(im->mode, "RGBX") == 0 if (hasAlpha) {
|| strcmp(im->mode, "RGBA") == 0) { newPixel[3] = (float) ((UINT8 *) & im->image32[y][x])[3];
newPixel[3] = (float) ((UINT8 *) & line[x + offset])[3];
} }
/* pack the channels into an INT32 so we can put them back in /* pack the channels into an INT32 so we can put them back in