Jinoh Kang : user32: Fix rounding in premultiplied alpha conversion for cursors and icons.
Alexandre Julliard
julliard at winehq.org
Wed Mar 16 16:48:24 CDT 2022
Module: wine
Branch: master
Commit: c4773e1823d4ed48e2f3918bf6a8753fcb2f645f
URL: https://source.winehq.org/git/wine.git/?a=commit;h=c4773e1823d4ed48e2f3918bf6a8753fcb2f645f
Author: Jinoh Kang <jinoh.kang.kr at gmail.com>
Date: Tue Mar 15 03:14:17 2022 +0900
user32: Fix rounding in premultiplied alpha conversion for cursors and icons.
Signed-off-by: Jinoh Kang <jinoh.kang.kr at gmail.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>
---
dlls/user32/cursoricon.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/dlls/user32/cursoricon.c b/dlls/user32/cursoricon.c
index cab9fbde32e..abf3a5dac53 100644
--- a/dlls/user32/cursoricon.c
+++ b/dlls/user32/cursoricon.c
@@ -775,9 +775,9 @@ static HBITMAP create_alpha_bitmap( HBITMAP color, const BITMAPINFO *src_info, c
for (i = 0, ptr = bits; i < bm.bmWidth * bm.bmHeight; i++, ptr += 4)
{
unsigned int alpha = ptr[3];
- ptr[0] = ptr[0] * alpha / 255;
- ptr[1] = ptr[1] * alpha / 255;
- ptr[2] = ptr[2] * alpha / 255;
+ ptr[0] = (ptr[0] * alpha + 127) / 255;
+ ptr[1] = (ptr[1] * alpha + 127) / 255;
+ ptr[2] = (ptr[2] * alpha + 127) / 255;
}
done:
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