fanc999 / d2d-sample-mostly-c Goto Github PK

Hello,

I had found your repository and saw you mentioning some issues with ID2D1HwndRenderTarget::GetSize in C.
I noticed a probably similar problem with GetPixelSize and I wrote this to fix it, basically instead of returning the size, you should be passing a out pointer as the 2nd argument.

I ran into this problem when I was working with GCC, I haven't tried it on MSVC yet though so if you are let me know if it works!

typedef VOID (* fnID2D1HwndRenderTarget_GetPixelSize) (ID2D1RenderTarget *, D2D1_SIZE_U *);
VOID ID2D1HwndRenderTarget_GetPixelSizeFix(ID2D1HwndRenderTarget *this, D2D1_SIZE_U *puSize) {
    fnID2D1HwndRenderTarget_GetPixelSize fnGetPixelSize = (fnID2D1HwndRenderTarget_GetPixelSize) ((ID2D1RenderTarget *)this)->lpVtbl->GetPixelSize;
    (*fnGetPixelSize)((ID2D1RenderTarget *)this, puSize);
}