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Optimized StretchDIBits to call SetDIBitsToDevice (when src & dst 

dimensions are equal).
This commit is contained in:
Eric Pouech 1999-10-13 15:40:17 +00:00 committed by Alexandre Julliard
parent 73077e3d61
commit 2818a67635
1 changed files with 22 additions and 16 deletions
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38
objects/dib.c
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@ -135,33 +135,39 @@ INT WINAPI StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst,
const BITMAPINFO *info, UINT wUsage, DWORD dwRop )
{
DC *dc = DC_GetDCPtr( hdc );
if(!dc) return FALSE;
if (widthDst == widthSrc && heightDst == heightSrc && dwRop == SRCCOPY) {
return SetDIBitsToDevice( hdc, xDst, yDst, widthDst, heightDst,
xSrc, ySrc, 0, info->bmiHeader.biHeight,
bits, info, 0/*FIXME coloruse*/ );
}
if(dc->funcs->pStretchDIBits)
return dc->funcs->pStretchDIBits(dc, xDst, yDst, widthDst,
heightDst, xSrc, ySrc, widthSrc,
heightSrc, bits, info, wUsage,
dwRop);
else { /* use StretchBlt32 */
HBITMAP hBitmap, hOldBitmap;
HDC hdcMem;
hBitmap = CreateDIBitmap( hdc, &info->bmiHeader, CBM_INIT,
bits, info, wUsage );
hdcMem = CreateCompatibleDC( hdc );
hOldBitmap = SelectObject( hdcMem, hBitmap );
/* Origin for DIBitmap is bottom left ! */
StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
hdcMem, xSrc, info->bmiHeader.biHeight - heightSrc - ySrc,
widthSrc, heightSrc, dwRop );
SelectObject( hdcMem, hOldBitmap );
DeleteDC( hdcMem );
DeleteObject( hBitmap );
return heightSrc;
HBITMAP hBitmap, hOldBitmap;
HDC hdcMem;
hBitmap = CreateDIBitmap( hdc, &info->bmiHeader, CBM_INIT,
bits, info, wUsage );
hdcMem = CreateCompatibleDC( hdc );
hOldBitmap = SelectObject( hdcMem, hBitmap );
/* Origin for DIBitmap is bottom left ! */
StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
hdcMem, xSrc, info->bmiHeader.biHeight - heightSrc - ySrc,
widthSrc, heightSrc, dwRop );
SelectObject( hdcMem, hOldBitmap );
DeleteDC( hdcMem );
DeleteObject( hBitmap );
}
return heightSrc;
}
/***********************************************************************
* SetDIBits16 (GDI.440)
*/