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windowscodecs: Optimise copy_pixels in case the whole bitmap is copied.

This commit is contained in:
Krzysztof Nowicki 2010-10-19 21:51:25 +02:00 committed by Alexandre Julliard
parent a1352035d1
commit db6731f628
1 changed files with 7 additions and 0 deletions
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7
dlls/windowscodecs/main.c
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@ -77,6 +77,13 @@ HRESULT copy_pixels(UINT bpp, const BYTE *srcbuffer,
if ((dststride * rc->Height) > dstbuffersize)
return E_INVALIDARG;
/* if the whole bitmap is copied and the buffer format matches then it's a matter of a single memcpy */
if (rc->X == 0 && rc->Y == 0 && rc->Width == srcwidth && rc->Height == srcheight && srcstride == dststride)
{
memcpy(dstbuffer, srcbuffer, srcstride * srcheight);
return S_OK;
}
row_offset = rc->X * bpp;
if (row_offset % 8 == 0)