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Fix maskblt to work with any set of rops and to also take into account 

the current brush.  It also now works if the mask bitmap is already
selected into a dc.
This commit is contained in:
Huw Davies 2004-08-11 18:51:10 +00:00 committed by Alexandre Julliard
parent 175208f5e1
commit 9277cf199f
1 changed files with 35 additions and 40 deletions
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75
dlls/gdi/bitblt.c
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@ -106,15 +106,8 @@ BOOL WINAPI StretchBlt( HDC hdcDst, INT xDst, INT yDst,
return ret;
}
static inline BYTE SwapROP3_SrcDst(BYTE bRop3)
{
return (bRop3 & 0x99) | ((bRop3 & 0x22) << 1) | ((bRop3 & 0x44) >> 1);
}
#define FRGND_ROP3(ROP4) ((ROP4) & 0x00FFFFFF)
#define BKGND_ROP3(ROP4) (ROP3Table[(SwapROP3_SrcDst((ROP4)>>24)) & 0xFF])
#define DSTCOPY 0x00AA0029
#define DSTERASE 0x00220326 /* dest = dest & (~src) : DSna */
#define BKGND_ROP3(ROP4) (ROP3Table[((ROP4)>>24) & 0xFF])
/***********************************************************************
* MaskBlt [GDI32.@]
@ -124,8 +117,10 @@ BOOL WINAPI MaskBlt(HDC hdcDest, INT nXDest, INT nYDest,
INT nXSrc, INT nYSrc, HBITMAP hbmMask,
INT xMask, INT yMask, DWORD dwRop)
{
HBITMAP hOldMaskBitmap, hBitmap2, hOldBitmap2, hBitmap3, hOldBitmap3;
HDC hDCMask, hDC1, hDC2;
HBITMAP hBitmap1, hOldBitmap1, hBitmap2, hOldBitmap2;
HDC hDC1, hDC2;
HBRUSH hbrMask, hbrDst, hbrTmp;
static const DWORD ROP3Table[256] =
{
0x00000042, 0x00010289,
@ -261,50 +256,50 @@ BOOL WINAPI MaskBlt(HDC hdcDest, INT nXDest, INT nYDest,
if (!hbmMask)
return BitBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, FRGND_ROP3(dwRop));
/* 1. make mask bitmap's dc */
hDCMask = CreateCompatibleDC(hdcDest);
hOldMaskBitmap = (HBITMAP)SelectObject(hDCMask, hbmMask);
hbrMask = CreatePatternBrush(hbmMask);
hbrDst = SelectObject(hdcDest, GetStockObject(NULL_BRUSH));
/* 2. make masked Background bitmap */
/* 2.1 make bitmap */
/* make bitmap */
hDC1 = CreateCompatibleDC(hdcDest);
hBitmap2 = CreateCompatibleBitmap(hdcDest, nWidth, nHeight);
hOldBitmap2 = (HBITMAP)SelectObject(hDC1, hBitmap2);
hBitmap1 = CreateCompatibleBitmap(hdcDest, nWidth, nHeight);
hOldBitmap1 = SelectObject(hDC1, hBitmap1);
/* 2.2 draw dest bitmap and mask */
BitBlt(hDC1, 0, 0, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, SRCCOPY);
BitBlt(hDC1, 0, 0, nWidth, nHeight, hdcDest, nXDest, nYDest, BKGND_ROP3(dwRop));
BitBlt(hDC1, 0, 0, nWidth, nHeight, hDCMask, xMask, yMask, DSTERASE);
/* draw using bkgnd rop */
BitBlt(hDC1, 0, 0, nWidth, nHeight, hdcDest, nXDest, nYDest, SRCCOPY);
hbrTmp = SelectObject(hDC1, hbrDst);
BitBlt(hDC1, 0, 0, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, BKGND_ROP3(dwRop));
SelectObject(hDC1, hbrTmp);
/* 3. make masked Foreground bitmap */
/* 3.1 make bitmap */
/* make bitmap */
hDC2 = CreateCompatibleDC(hdcDest);
hBitmap3 = CreateCompatibleBitmap(hdcDest, nWidth, nHeight);
hOldBitmap3 = (HBITMAP)SelectObject(hDC2, hBitmap3);
hBitmap2 = CreateCompatibleBitmap(hdcDest, nWidth, nHeight);
hOldBitmap2 = SelectObject(hDC2, hBitmap2);
/* 3.2 draw src bitmap and mask */
/* draw using foregnd rop */
BitBlt(hDC2, 0, 0, nWidth, nHeight, hdcDest, nXDest, nYDest, SRCCOPY);
hbrTmp = SelectObject(hDC2, hbrDst);
BitBlt(hDC2, 0, 0, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, FRGND_ROP3(dwRop));
BitBlt(hDC2, 0, 0, nWidth, nHeight, hDCMask, xMask, yMask, SRCAND);
/* 4. combine two bitmap and copy it to hdcDest */
BitBlt(hDC1, 0, 0, nWidth, nHeight, hDC2, 0, 0, SRCPAINT);
BitBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, hDC1, 0, 0, SRCCOPY);
/* combine both using the mask as a pattern brush */
SelectObject(hDC2, hbrMask);
BitBlt(hDC2, 0, 0, nWidth, nHeight, hDC1, 0, 0, 0xac0744 ); /* (D & P) | (S & ~P) */
SelectObject(hDC2, hbrTmp);
/* 5. restore all object */
SelectObject(hDCMask, hOldMaskBitmap);
SelectObject(hDC1, hOldBitmap2);
SelectObject(hDC2, hOldBitmap3);
/* blit to dst */
BitBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, hDC2, 0, 0, SRCCOPY);
/* 6. delete all temp object */
DeleteObject(hBitmap2);
DeleteObject(hBitmap3);
/* restore all objects */
SelectObject(hdcDest, hbrDst);
SelectObject(hDC1, hOldBitmap1);
SelectObject(hDC2, hOldBitmap2);
/* delete all temp objects */
DeleteObject(hBitmap1);
DeleteObject(hBitmap1);
DeleteObject(hbrMask);
DeleteDC(hDC1);
DeleteDC(hDC2);
DeleteDC(hDCMask);
return TRUE;
}