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gdi32: Ignore the alpha channel for blits to DDBs too. 

Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Huw Davies 2017-10-06 13:08:47 +01:00 committed by Alexandre Julliard
parent ffed1a5f9f
commit de9d224996
1 changed files with 5 additions and 2 deletions
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7
dlls/gdi32/bitblt.c
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@ -843,6 +843,7 @@ BOOL WINAPI GdiTransparentBlt( HDC hdcDest, int xDest, int yDest, int widthDest,
COLORREF oldBackground;
COLORREF oldForeground;
int oldStretchMode;
DIBSECTION dib;
if(widthDest < 0 || heightDest < 0 || widthSrc < 0 || heightSrc < 0) {
TRACE("Cannot mirror\n");
@ -857,9 +858,11 @@ BOOL WINAPI GdiTransparentBlt( HDC hdcDest, int xDest, int yDest, int widthDest,
if(oldStretchMode == BLACKONWHITE || oldStretchMode == WHITEONBLACK)
SetStretchBltMode(hdcSrc, COLORONCOLOR);
hdcWork = CreateCompatibleDC(hdcDest);
if (GetObjectType( hdcDest ) != OBJ_MEMDC && GetDeviceCaps( hdcDest, BITSPIXEL ) == 32)
if ((GetObjectType( hdcDest ) != OBJ_MEMDC ||
GetObjectW( GetCurrentObject( hdcDest, OBJ_BITMAP ), sizeof(dib), &dib ) == sizeof(BITMAP)) &&
GetDeviceCaps( hdcDest, BITSPIXEL ) == 32)
{
/* screen DCs are not supposed to have an alpha channel, so use a 24-bpp bitmap as copy */
/* screen DCs or DDBs are not supposed to have an alpha channel, so use a 24-bpp bitmap as copy */
BITMAPINFO info;
info.bmiHeader.biSize = sizeof(info.bmiHeader);
info.bmiHeader.biWidth = widthDest;