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If the driver doesn't support StretchBlt try to use StretchDIBits

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instead.
This commit is contained in:
Huw Davies 2005-11-28 10:38:33 +01:00 committed by Alexandre Julliard
parent 0b17529332
commit 1ee8dd8901
1 changed files with 59 additions and 16 deletions
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75
dlls/gdi/bitblt.c
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@ -84,25 +84,68 @@ BOOL WINAPI StretchBlt( HDC hdcDst, INT xDst, INT yDst,
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->pStretchBlt)
{
dcSrc = DC_GetDCPtr( hdcSrc );
TRACE("%p %d,%d %dx%d -> %p %d,%d %dx%d rop=%06lx\n",
hdcSrc, xSrc, ySrc, widthSrc, heightSrc,
hdcDst, xDst, yDst, widthDst, heightDst, rop );
if (dcSrc) {
if (dcDst->funcs->pStretchBlt)
ret = dcDst->funcs->pStretchBlt( dcDst->physDev, xDst, yDst, widthDst, heightDst,
dcSrc->physDev, xSrc, ySrc, widthSrc, heightSrc,
rop );
GDI_ReleaseObj( hdcSrc );
}
GDI_ReleaseObj( hdcDst );
/* FIXME: there is a race condition here */
if ((dcSrc = DC_GetDCUpdate( hdcSrc )))
{
dcDst = DC_GetDCPtr( hdcDst );
TRACE("%p %d,%d %dx%d -> %p %d,%d %dx%d rop=%06lx\n",
hdcSrc, xSrc, ySrc, widthSrc, heightSrc,
hdcDst, xDst, yDst, widthDst, heightDst, rop );
ret = dcDst->funcs->pStretchBlt( dcDst->physDev, xDst, yDst, widthDst, heightDst,
dcSrc->physDev, xSrc, ySrc, widthSrc, heightSrc,
rop );
GDI_ReleaseObj( hdcDst );
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) 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, widthDst, heightDst, xSrc, ySrc, widthSrc, heightSrc,
bits, (BITMAPINFO*)&info_hdr, DIB_RGB_COLORS, rop);
HeapFree(GetProcessHeap(), 0, bits);
return (lines == bm.bmHeight);
}
else if(dcDst)
GDI_ReleaseObj( hdcDst );
return ret;
}