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gdi32/enhmfdrv: When blitting, don't crash if the source is NULL.

This commit is contained in:
Charles Davis 2009-11-22 13:25:38 -07:00 committed by Alexandre Julliard
parent 5e17b04df7
commit b6f841eaca
1 changed files with 75 additions and 38 deletions
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45
dlls/gdi32/enhmfdrv/bitblt.c
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@ -79,10 +79,14 @@ static BOOL EMFDRV_BitBlockTransfer(
UINT bitsSize;
UINT size;
BITMAP BM;
WORD nBPP;
WORD nBPP = 0;
LPBITMAPINFOHEADER lpBmiH;
BOOL useSrc;
EMFDRV_PDEVICE* physDevSrc = (EMFDRV_PDEVICE*)devSrc;
HBITMAP hBitmap = GetCurrentObject(physDevSrc->hdc, OBJ_BITMAP);
HBITMAP hBitmap = NULL;
useSrc = (((rop >> 2) & 0x330000) != (rop & 0x330000));
if (!physDevSrc && useSrc) return FALSE;
if (emrType == EMR_BITBLT)
emrSize = sizeof(EMRBITBLT);
@ -91,15 +95,24 @@ static BOOL EMFDRV_BitBlockTransfer(
else
return FALSE;
if(useSrc)
{
hBitmap = GetCurrentObject(physDevSrc->hdc, OBJ_BITMAP);
if(sizeof(BITMAP) != GetObjectW(hBitmap, sizeof(BITMAP), &BM))
return FALSE;
nBPP = BM.bmPlanes * BM.bmBitsPixel;
if(nBPP > 8) nBPP = 24; /* FIXME Can't get 16bpp to work for some reason */
bitsSize = DIB_GetDIBWidthBytes(BM.bmWidth, nBPP) * BM.bmHeight;
bmiSize = sizeof(BITMAPINFOHEADER) +
(nBPP <= 8 ? 1 << nBPP : 0) * sizeof(RGBQUAD);
}
else
{
bitsSize = bmiSize = 0;
}
size = emrSize + bmiSize + bitsSize;
pEMR = HeapAlloc(GetProcessHeap(), 0, size);
@ -119,12 +132,28 @@ static BOOL EMFDRV_BitBlockTransfer(
pEMR->dwRop = rop;
pEMR->xSrc = xSrc;
pEMR->ySrc = ySrc;
if (useSrc)
{
GetWorldTransform(physDevSrc->hdc, &pEMR->xformSrc);
pEMR->crBkColorSrc = GetBkColor(physDevSrc->hdc);
pEMR->iUsageSrc = DIB_RGB_COLORS;
pEMR->offBmiSrc = emrSize;
pEMR->cbBmiSrc = bmiSize;
pEMR->offBitsSrc = emrSize + bmiSize;
}
else
{
pEMR->xformSrc.eM11 = 1.0; /** FIXME: */
pEMR->xformSrc.eM12 = 0.0; /** Setting default */
pEMR->xformSrc.eM21 = 0.0; /** value. */
pEMR->xformSrc.eM22 = 1.0; /** Where should we */
pEMR->xformSrc.eDx = 0.0; /** get that info */
pEMR->xformSrc.eDy = 0.0; /** ???? */
pEMR->crBkColorSrc = 0;
pEMR->iUsageSrc = 0;
pEMR->offBmiSrc = 0;
pEMR->offBitsSrc = 0;
}
pEMR->cbBmiSrc = bmiSize;
pEMR->cbBitsSrc = bitsSize;
if (emrType == EMR_STRETCHBLT)
{
@ -133,6 +162,8 @@ static BOOL EMFDRV_BitBlockTransfer(
pEMRStretch->cySrc = heightSrc;
}
if (useSrc)
{
/* Initialize BITMAPINFO structure */
lpBmiH = (LPBITMAPINFOHEADER)((BYTE*)pEMR + pEMR->offBmiSrc);
@ -161,6 +192,12 @@ static BOOL EMFDRV_BitBlockTransfer(
}
else
ret = FALSE;
}
else
{
ret = EMFDRV_WriteRecord(devDst, (EMR*)pEMR);
if (ret) EMFDRV_UpdateBBox(devDst, &(pEMR->rclBounds));
}
HeapFree( GetProcessHeap(), 0, pEMR);
return ret;