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wined3d: Avoid a NULL pointer dereference in UpdateTexture (Coverity).

This commit is contained in:
Stefan Dösinger 2007-01-12 00:20:42 +01:00 committed by Alexandre Julliard
parent 723b32b1c9
commit ce0773a02e
1 changed files with 4 additions and 3 deletions
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7
dlls/wined3d/device.c
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@ -5162,7 +5162,7 @@ static HRESULT WINAPI IWineD3DDeviceImpl_UpdateSurface(IWineD3DDevice *iface,
unsigned int srcSurfaceWidth, srcSurfaceHeight, destSurfaceWidth, destSurfaceHeight;
WINED3DFORMAT destFormat, srcFormat;
UINT destSize;
int destLeft, destTop;
int srcLeft, destLeft, destTop;
WINED3DPOOL srcPool, destPool;
int offset = 0;
int rowoffset = 0; /* how many bytes to add onto the end of a row to wraparound to the beginning of the next */
@ -5212,15 +5212,16 @@ static HRESULT WINAPI IWineD3DDeviceImpl_UpdateSurface(IWineD3DDevice *iface,
/* this needs to be done in lines if the sourceRect != the sourceWidth */
srcWidth = pSourceRect ? pSourceRect->right - pSourceRect->left : srcSurfaceWidth;
srcHeight = pSourceRect ? pSourceRect->top - pSourceRect->bottom : srcSurfaceHeight;
srcLeft = pSourceRect ? pSourceRect->left : 0;
destLeft = pDestPoint ? pDestPoint->x : 0;
destTop = pDestPoint ? pDestPoint->y : 0;
/* This function doesn't support compressed textures
the pitch is just bytesPerPixel * width */
if(srcWidth != srcSurfaceWidth || (pSourceRect != NULL && pSourceRect->left != 0) ){
if(srcWidth != srcSurfaceWidth || srcLeft ){
rowoffset = (srcSurfaceWidth - srcWidth) * pSrcSurface->bytesPerPixel;
offset += pSourceRect->left * pSrcSurface->bytesPerPixel;
offset += srcLeft * pSrcSurface->bytesPerPixel;
/* TODO: do we ever get 3bpp?, would a shift and an add be quicker than a mul (well maybe a cycle or two) */
}
/* TODO DXT formats */