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gdi32: Fallback to StretchDIBits if the driver doesn't support BitBlt.

This commit is contained in:
Huw Davies 2006-02-23 12:02:03 +00:00 committed by Alexandre Julliard
parent 56247a2084
commit 66a05b2aec
1 changed files with 57 additions and 8 deletions
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61
dlls/gdi/bitblt.c
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@ -55,19 +55,68 @@ BOOL WINAPI BitBlt( HDC hdcDst, INT xDst, INT yDst, INT width,
BOOL ret = FALSE;
DC *dcDst, *dcSrc;
if ((dcSrc = DC_GetDCUpdate( hdcSrc ))) GDI_ReleaseObj( hdcSrc );
/* FIXME: there is a race condition here */
if ((dcDst = DC_GetDCUpdate( hdcDst )))
if ((dcDst = DC_GetDCUpdate( hdcDst )) && dcDst->funcs->pBitBlt)
{
dcSrc = DC_GetDCPtr( hdcSrc );
GDI_ReleaseObj( hdcDst );
/* FIXME: there is a race condition here */
dcSrc = DC_GetDCUpdate( hdcSrc );
dcDst = DC_GetDCPtr( hdcDst );
TRACE("hdcSrc=%p %d,%d -> hdcDest=%p %d,%d %dx%d rop=%06lx\n",
hdcSrc, xSrc, ySrc, hdcDst, xDst, yDst, width, height, rop);
if (dcDst->funcs->pBitBlt)
ret = dcDst->funcs->pBitBlt( dcDst->physDev, xDst, yDst, width, height,
dcSrc ? dcSrc->physDev : NULL, xSrc, ySrc, rop );
if (dcSrc) GDI_ReleaseObj( hdcSrc );
GDI_ReleaseObj( hdcDst );
if (dcSrc) GDI_ReleaseObj( hdcSrc );
}
else if(dcDst && dcDst->funcs->pStretchDIBits)
{
BITMAP bm;
BITMAPINFOHEADER info_hdr;
HBITMAP hbm;
LPVOID bits;
INT lines;
GDI_ReleaseObj( hdcDst );
if(GetObjectType( hdcSrc ) != OBJ_MEMDC)
{
FIXME("hdcSrc isn't a memory dc. Don't yet cope with this\n");
return FALSE;
}
GetObjectW(GetCurrentObject(hdcSrc, OBJ_BITMAP), sizeof(bm), &bm);
info_hdr.biSize = sizeof(info_hdr);
info_hdr.biWidth = bm.bmWidth;
info_hdr.biHeight = bm.bmHeight;
info_hdr.biPlanes = 1;
info_hdr.biBitCount = 32;
info_hdr.biCompression = BI_RGB;
info_hdr.biSizeImage = 0;
info_hdr.biXPelsPerMeter = 0;
info_hdr.biYPelsPerMeter = 0;
info_hdr.biClrUsed = 0;
info_hdr.biClrImportant = 0;
if(!(bits = HeapAlloc(GetProcessHeap(), 0, bm.bmHeight * bm.bmWidth * 4)))
return FALSE;
/* Select out the src bitmap before calling GetDIBits */
hbm = SelectObject(hdcSrc, GetStockObject(DEFAULT_BITMAP));
GetDIBits(hdcSrc, hbm, 0, bm.bmHeight, bits, (BITMAPINFO*)&info_hdr, DIB_RGB_COLORS);
SelectObject(hdcSrc, hbm);
lines = StretchDIBits(hdcDst, xDst, yDst, width, height, xSrc, ySrc, width, height,
bits, (BITMAPINFO*)&info_hdr, DIB_RGB_COLORS, rop);
HeapFree(GetProcessHeap(), 0, bits);
return (lines == bm.bmHeight);
}
else if(dcDst)
GDI_ReleaseObj( hdcDst );
return ret;
}