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Fix T44814: 'preview' icons would not greyout. 

Since they are premultiplied, we need separated handling of colors and alpha blending
if we want additional alpha factor to work OK.
This commit is contained in:
Bastien Montagne 2015-05-24 18:35:14 +02:00
parent a28adf1b35
commit 78918e761f
Notes: blender-bot 2023-02-14 10:29:32 +01:00 
Referenced by issue #44814, Custom icons do not greyout
1 changed files with 2 additions and 5 deletions
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7
source/blender/editors/interface/interface_icons.c
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@ -1224,15 +1224,12 @@ static void icon_draw_size(
PreviewImage *pi = (icon->type != 0) ? BKE_previewimg_id_ensure((ID *)icon->obj) : icon->obj;
if (pi) {
/* Do deferred loading/generation if needed. */
// BKE_previewimg_ensure(pi, size);
/* no create icon on this level in code */
if (!pi->rect[size]) return; /* something has gone wrong! */
/* preview images use premul alpha ... */
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
icon_draw_rect(x, y, w, h, aspect, pi->w[size], pi->h[size], pi->rect[size], 1.0f, NULL, is_preview);
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
icon_draw_rect(x, y, w, h, aspect, pi->w[size], pi->h[size], pi->rect[size], alpha, rgb, is_preview);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
}