virtual HRESULT STDMETHODCALLTYPE GetGdiInterop(
IDWriteGdiInterop** gdiInterop
)
{
HRESULT result;
result = orig_this->GetGdiInterop(gdiInterop);
if (SUCCEEDED(result)) {
IDWriteGdiInterop *delegate = new(std::nothrow) delegate_dwrite_gdi_interop(*gdiInterop, mycoll);
if (delegate != nullptr) {
*gdiInterop = iunknown_addref(delegate);
}
}
return result;
}
FX_BOOL CDWriteExt::DwCreateRenderingTarget(CFX_DIBitmap* pBitmap, void** renderTarget)
{
if (pBitmap->GetFormat() > FXDIB_Argb) {
return FALSE;
}
IDWriteFactory* pDwFactory = (IDWriteFactory*)m_pDWriteFactory;
IDWriteGdiInterop* pGdiInterop = NULL;
IDWriteBitmapRenderTarget* pBitmapRenderTarget = NULL;
IDWriteRenderingParams* pRenderingParams = NULL;
HRESULT hr = S_OK;
hr = pDwFactory->GetGdiInterop(&pGdiInterop);
if (FAILED(hr)) {
goto failed;
}
hr = pGdiInterop->CreateBitmapRenderTarget(NULL, pBitmap->GetWidth(), pBitmap->GetHeight(),
&pBitmapRenderTarget);
if (FAILED(hr)) {
goto failed;
}
hr = pDwFactory->CreateCustomRenderingParams(
1.0f,
0.0f,
1.0f,
DWRITE_PIXEL_GEOMETRY_RGB,
DWRITE_RENDERING_MODE_DEFAULT,
&pRenderingParams
);
if (FAILED(hr)) {
goto failed;
}
hr = pBitmapRenderTarget->SetPixelsPerDip(1.0f);
if (FAILED(hr)) {
goto failed;
}
*(CDwGdiTextRenderer**)renderTarget = FX_NEW CDwGdiTextRenderer(pBitmap, pBitmapRenderTarget, pRenderingParams);
if (*(CDwGdiTextRenderer**)renderTarget == NULL) {
goto failed;
}
SafeRelease(&pGdiInterop);
SafeRelease(&pBitmapRenderTarget);
SafeRelease(&pRenderingParams);
return TRUE;
failed:
SafeRelease(&pGdiInterop);
SafeRelease(&pBitmapRenderTarget);
SafeRelease(&pRenderingParams);
return FALSE;
}