Method TextureResizeShader

Source/DX11VideoProcessor.cpp:332–377

}

HRESULT CDX11VideoProcessor::TextureResizeShader(
	const Tex2D_t& Tex, ID3D11Texture2D* pRenderTarget,
	const CRect& srcRect, const CRect& dstRect,
	ID3D11PixelShader* pPixelShader,
	const int iRotation, const bool bFlip)
{
	CComPtr<ID3D11RenderTargetView> pRenderTargetView;

	HRESULT hr = m_pDevice->CreateRenderTargetView(pRenderTarget, nullptr, &pRenderTargetView);
	if (FAILED(hr)) {
		DLog(L"CDX11VideoProcessor::TextureResizeShader() : CreateRenderTargetView() failed with error {}", HR2Str(hr));
		return hr;
	}

	hr = FillVertexBuffer(m_pDeviceContext, m_pVertexBuffer, Tex.desc.Width, Tex.desc.Height, srcRect, iRotation, bFlip);
	if (FAILED(hr)) {
		return hr;
	}

	const FLOAT constants[][4] = {
		{(float)Tex.desc.Width, (float)Tex.desc.Height, 1.0f / Tex.desc.Width, 1.0f / Tex.desc.Height},
		{(float)srcRect.Width() / dstRect.Width(), (float)srcRect.Height() / dstRect.Height(), 0, 0}
	};

	D3D11_MAPPED_SUBRESOURCE mr;
	hr = m_pDeviceContext->Map(m_pResizeShaderConstantBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mr);
	if (FAILED(hr)) {
		DLog(L"CDX11VideoProcessor::TextureResizeShader() : Map() failed with error {}", HR2Str(hr));
		return hr;
	}

	memcpy(mr.pData, &constants, sizeof(constants));
	m_pDeviceContext->Unmap(m_pResizeShaderConstantBuffer, 0);

	D3D11_VIEWPORT VP;
	VP.TopLeftX = (FLOAT)dstRect.left;
	VP.TopLeftY = (FLOAT)dstRect.top;
	VP.Width = (FLOAT)dstRect.Width();
	VP.Height = (FLOAT)dstRect.Height();
	VP.MinDepth = 0.0f;
	VP.MaxDepth = 1.0f;

	TextureBlt11(m_pDeviceContext, pRenderTargetView, VP, m_pVSimpleInputLayout, m_pVS_Simple, pPixelShader, Tex.pShaderResource, m_pSamplerPoint, m_pResizeShaderConstantBuffer, m_pVertexBuffer);

	return hr;
}

// CDX11VideoProcessor