opencv/samples/wp8/OcvImageManipulation/PhoneXamlDirect3DApp1/PhoneXamlDirect3DApp1Comp/Direct3DContentProvider.cpp

#include "pch.h"
#include "Direct3DContentProvider.h"

using namespace PhoneXamlDirect3DApp1Comp;

Direct3DContentProvider::Direct3DContentProvider(Direct3DInterop^ controller) :
	m_controller(controller)
{
	m_controller->RequestAdditionalFrame += ref new RequestAdditionalFrameHandler([=] ()
		{
			if (m_host)
			{
				m_host->RequestAdditionalFrame();
			}
		});
	
	m_controller->RecreateSynchronizedTexture += ref new RecreateSynchronizedTextureHandler([=] ()
		{
			if (m_host)
			{
				m_host->CreateSynchronizedTexture(m_controller->GetTexture(), &m_synchronizedTexture);
			}
		});
}

// IDrawingSurfaceContentProviderNative interface
HRESULT Direct3DContentProvider::Connect(_In_ IDrawingSurfaceRuntimeHostNative* host)
{
	m_host = host;

	return m_controller->Connect(host);
}

void Direct3DContentProvider::Disconnect()
{
	m_controller->Disconnect();
	m_host = nullptr;
	m_synchronizedTexture = nullptr;
}

HRESULT Direct3DContentProvider::PrepareResources(_In_ const LARGE_INTEGER* presentTargetTime, _Out_ BOOL* contentDirty)
{
	return m_controller->PrepareResources(presentTargetTime, contentDirty);
}

HRESULT Direct3DContentProvider::GetTexture(_In_ const DrawingSurfaceSizeF* size, _Out_ IDrawingSurfaceSynchronizedTextureNative** synchronizedTexture, _Out_ DrawingSurfaceRectF* textureSubRectangle)
{
	HRESULT hr = S_OK;

	if (!m_synchronizedTexture)
	{
		hr = m_host->CreateSynchronizedTexture(m_controller->GetTexture(), &m_synchronizedTexture);
	}

	// Set output parameters.
	textureSubRectangle->left = 0.0f;
	textureSubRectangle->top = 0.0f;
	textureSubRectangle->right = static_cast<FLOAT>(size->width);
	textureSubRectangle->bottom = static_cast<FLOAT>(size->height);

	m_synchronizedTexture.CopyTo(synchronizedTexture);

	// Draw to the texture.
	if (SUCCEEDED(hr))
	{
		hr = m_synchronizedTexture->BeginDraw();
		
		if (SUCCEEDED(hr))
		{
			hr = m_controller->GetTexture(size, synchronizedTexture, textureSubRectangle);
		}

		m_synchronizedTexture->EndDraw();
	}

	return hr;
}