GreGradientFill IntGdiPolygon IntGdiPolyPolygon IntRectangle IntRoundRect NDEBUG NtGdiEllipse NtGdiExtFloodFill NtGdiGradientFill NtGdiPolyPolyDraw NtGdiRectangle NtGdiRoundRect Rcos Rsin

BOOL APIENTRY NtGdiGradientFill ( HDC  hdc, PTRIVERTEX  pVertex, ULONG  nVertex, PVOID  pMesh, ULONG  nMesh, ULONG  ulMode  ) Definition at line 963 of file fillshap.c. { BOOL bRet; PTRIVERTEX SafeVertex; PVOID SafeMesh; ULONG cbVertex, cbMesh; /* Validate parameters */ if (!pVertex || !nVertex || !pMesh || !nMesh) { EngSetLastError(ERROR_INVALID_PARAMETER); return FALSE; } switch (ulMode) { case GRADIENT_FILL_RECT_H: case GRADIENT_FILL_RECT_V: cbMesh = nMesh * sizeof(GRADIENT_RECT); break; case GRADIENT_FILL_TRIANGLE: cbMesh = nMesh * sizeof(GRADIENT_TRIANGLE); break; default: EngSetLastError(ERROR_INVALID_PARAMETER); return FALSE; } cbVertex = nVertex * sizeof(TRIVERTEX) ; if(cbVertex + cbMesh <= cbVertex) { /* Overflow */ return FALSE ; } /* Allocate a kernel mode buffer */ SafeVertex = ExAllocatePoolWithTag(PagedPool, cbVertex + cbMesh, TAG_SHAPE); if(!SafeVertex) { EngSetLastError(ERROR_NOT_ENOUGH_MEMORY); return FALSE; } SafeMesh = (PVOID)((ULONG_PTR)SafeVertex + cbVertex); /* Copy the parameters to kernel mode */ _SEH2_TRY { ProbeForRead(pVertex, cbVertex, 1); ProbeForRead(pMesh, cbMesh, 1); RtlCopyMemory(SafeVertex, pVertex, cbVertex); RtlCopyMemory(SafeMesh, pMesh, cbMesh); } _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER) { ExFreePoolWithTag(SafeVertex, TAG_SHAPE); SetLastNtError(_SEH2_GetExceptionCode()); _SEH2_YIELD(return FALSE;) } _SEH2_END; /* Call the internal function */ bRet = GreGradientFill(hdc, SafeVertex, nVertex, SafeMesh, nMesh, ulMode); /* Cleanup and return result */ ExFreePoolWithTag(SafeVertex, TAG_SHAPE); return bRet; }