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Update src/_imagingft.c

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Co-authored-by: Andrew Murray <3112309+radarhere@users.noreply.github.com>
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Zach Nagengast 2023-11-28 11:53:46 -08:00 committed by GitHub
parent 9c60e856ad
commit 78f78d2aa7
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1 changed files with 6 additions and 6 deletions
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src/_imagingft.c
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@ -1065,21 +1065,21 @@ font_render(FontObject *self, PyObject *args) {
if (src_alpha > 0) {
/* unpremultiply BGRa */
int src_red = CLIP8((255 * (int)source[k * 4 + 2]) / src_alpha);
int src_grn = CLIP8((255 * (int)source[k * 4 + 1]) / src_alpha);
int src_blu = CLIP8((255 * (int)source[k * 4 + 0]) / src_alpha);
int src_green = CLIP8((255 * (int)source[k * 4 + 1]) / src_alpha);
int src_blue = CLIP8((255 * (int)source[k * 4 + 0]) / src_alpha);
/* blend required if target has data */
if (target[k * 4 + 3] > 0) {
/* blend RGBA colors */
target[k * 4 + 0] = BLEND(src_alpha, target[k * 4 + 0], src_red, tmp);
target[k * 4 + 1] = BLEND(src_alpha, target[k * 4 + 1], src_grn, tmp);
target[k * 4 + 2] = BLEND(src_alpha, target[k * 4 + 2], src_blu, tmp);
target[k * 4 + 1] = BLEND(src_alpha, target[k * 4 + 1], src_green, tmp);
target[k * 4 + 2] = BLEND(src_alpha, target[k * 4 + 2], src_blue, tmp);
target[k * 4 + 3] = CLIP8(src_alpha + MULDIV255(target[k * 4 + 3], (255 - src_alpha), tmp));
} else {
/* paste unpremultiplied RGBA values */
target[k * 4 + 0] = src_red;
target[k * 4 + 1] = src_grn;
target[k * 4 + 2] = src_blu;
target[k * 4 + 1] = src_green;
target[k * 4 + 2] = src_blue;
target[k * 4 + 3] = src_alpha;
}
}