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Moved mode check outside of loops

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This commit is contained in:
Andrew Murray 2022-10-09 08:48:07 +11:00
parent 243402e78e
commit eef4d1ced1
1 changed files with 6 additions and 6 deletions
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12
src/libImaging/Paste.c
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@ -432,18 +432,18 @@ fill_mask_L(
} }
} else { } else {
int alpha_channel = strcmp(imOut->mode, "RGBa") == 0 ||
strcmp(imOut->mode, "RGBA") == 0 ||
strcmp(imOut->mode, "La") == 0 ||
strcmp(imOut->mode, "LA") == 0 ||
strcmp(imOut->mode, "PA") == 0;
for (y = 0; y < ysize; y++) { for (y = 0; y < ysize; y++) {
UINT8 *out = (UINT8 *)imOut->image[y + dy] + dx * pixelsize; UINT8 *out = (UINT8 *)imOut->image[y + dy] + dx * pixelsize;
UINT8 *mask = (UINT8 *)imMask->image[y + sy] + sx; UINT8 *mask = (UINT8 *)imMask->image[y + sy] + sx;
for (x = 0; x < xsize; x++) { for (x = 0; x < xsize; x++) {
for (i = 0; i < pixelsize; i++) { for (i = 0; i < pixelsize; i++) {
UINT8 channel_mask = *mask; UINT8 channel_mask = *mask;
if ((strcmp(imOut->mode, "RGBa") == 0 || if (alpha_channel && i != 3 && channel_mask != 0) {
strcmp(imOut->mode, "RGBA") == 0 ||
strcmp(imOut->mode, "La") == 0 ||
strcmp(imOut->mode, "LA") == 0 ||
strcmp(imOut->mode, "PA") == 0) &&
i != 3 && channel_mask != 0) {
channel_mask = channel_mask =
255 - (255 - channel_mask) * (1 - (255 - out[3]) / 255); 255 - (255 - channel_mask) * (1 - (255 - out[3]) / 255);
} }