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- Fix Alpha Blending while using layered windows in lower bit modes. See CORE-10167.

svn path=/trunk/; revision=69202
This commit is contained in:
James Tabor 2015-09-12 17:29:16 +00:00
parent 28b957e970
commit 5547abd08e
1 changed files with 15 additions and 4 deletions
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19
reactos/win32ss/user/ntuser/layered.c
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@ -154,7 +154,8 @@ IntUpdateLayeredWindowI( PWND pWnd,
RECT Rect;
BLENDFUNCTION blend = { AC_SRC_OVER, 0, 255, 0 };
COLORREF color_key = (info->dwFlags & ULW_COLORKEY) ? info->crKey : CLR_INVALID;
HBITMAP hBitmapBuffer, hOldBitmap;
HBITMAP hOldBitmap, hOldBitmap1, hbmSrc, hbmDst;
DIBSECTION dibs;
Rect = Window;
@ -165,9 +166,17 @@ IntUpdateLayeredWindowI( PWND pWnd,
if (!info->hdcDst) hdc = UserGetDCEx(pWnd, NULL, DCX_USESTYLE);
else hdc = info->hdcDst;
hbmSrc = NtGdiCreateCompatibleBitmap(info->hdcSrc, Rect.right - Rect.left, Rect.bottom - Rect.top);
hbmDst = NtGdiCreateCompatibleBitmap(info->hdcSrc, Rect.right - Rect.left, Rect.bottom - Rect.top);
GreGetObject(hbmSrc, sizeof(DIBSECTION), &dibs);
TRACE("Source Bitmap bc %d\n",dibs.dsBmih.biBitCount);
hdcBuffer = NtGdiCreateCompatibleDC(hdc);
hBitmapBuffer = NtGdiCreateCompatibleBitmap(hdc, Rect.right - Rect.left, Rect.bottom - Rect.top);
hOldBitmap = (HBITMAP)NtGdiSelectBitmap(hdcBuffer, hBitmapBuffer);
hOldBitmap = (HBITMAP)NtGdiSelectBitmap(hdcBuffer, hbmSrc);
hOldBitmap1 = (HBITMAP)NtGdiSelectBitmap(hdc, hbmDst);
NtGdiStretchBlt( hdcBuffer,
Rect.left,
@ -209,8 +218,10 @@ IntUpdateLayeredWindowI( PWND pWnd,
blend,
0);
NtGdiSelectBitmap(hdc, hOldBitmap1);
NtGdiSelectBitmap(hdcBuffer, hOldBitmap);
if (hBitmapBuffer) GreDeleteObject(hBitmapBuffer);
if (hbmSrc) GreDeleteObject(hbmSrc);
if (hbmDst) GreDeleteObject(hbmDst);
if (hdcBuffer) IntGdiDeleteDC(hdcBuffer, FALSE);
if (!info->hdcDst) UserReleaseDC(pWnd, hdc, FALSE);
}