root/samples/wp8/OcvRotatingCube/PhoneXamlDirect3DApp1/PhoneXamlDirect3DApp1Comp/Direct3DInterop.cpp

DEFINITIONS

1. ApplyGrayFilter
2. ApplyCannyFilter
3. ApplySepiaFilter
4. CreateContentProvider
5. SetManipulationHost
6. set
7. OnPointerPressed
8. OnPointerMoved
9. OnPointerReleased
10. Connect
11. Disconnect
12. PrepareResources
13. GetTexture
14. GetTexture
15. CreateTexture
16. GetPointerToPixelData

#include "pch.h"
#include "Direct3DInterop.h"
#include "Direct3DContentProvider.h"
#include <windows.storage.streams.h>
#include <wrl.h>
#include <robuffer.h>
#include <opencv2\imgproc\types_c.h>

using namespace Windows::Storage::Streams;
using namespace Microsoft::WRL;
using namespace Windows::Foundation;
using namespace Windows::UI::Core;
using namespace Microsoft::WRL;
using namespace Windows::Phone::Graphics::Interop;
using namespace Windows::Phone::Input::Interop;

namespace PhoneXamlDirect3DApp1Comp
{
    void Direct3DInterop::ApplyGrayFilter(const cv::Mat& image)
    {
        cv::Mat intermediateMat;
        cv::cvtColor(image, intermediateMat, CV_RGBA2GRAY);
        cv::cvtColor(intermediateMat, image, CV_GRAY2BGRA);
    }

    void Direct3DInterop::ApplyCannyFilter(const cv::Mat& image)
    {
        cv::Mat intermediateMat;
        cv::Canny(image, intermediateMat, 80, 90);
        cv::cvtColor(intermediateMat, image, CV_GRAY2BGRA);
    }

    void Direct3DInterop::ApplySepiaFilter(const cv::Mat& image)
    {
        const float SepiaKernelData[16] =
        {
            /* B */0.131f, 0.534f, 0.272f, 0.f,
            /* G */0.168f, 0.686f, 0.349f, 0.f,
            /* R */0.189f, 0.769f, 0.393f, 0.f,
            /* A */0.000f, 0.000f, 0.000f, 1.f
        };

        const cv::Mat SepiaKernel(4, 4, CV_32FC1, (void*)SepiaKernelData);
        cv::transform(image, image, SepiaKernel);
    }

    Direct3DInterop::Direct3DInterop() :
        m_timer(ref new BasicTimer())
    {
    }

    IDrawingSurfaceContentProvider^ Direct3DInterop::CreateContentProvider()
    {
        ComPtr<Direct3DContentProvider> provider = Make<Direct3DContentProvider>(this);
        return reinterpret_cast<IDrawingSurfaceContentProvider^>(provider.Detach());
    }

    // IDrawingSurfaceManipulationHandler
    void Direct3DInterop::SetManipulationHost(DrawingSurfaceManipulationHost^ manipulationHost)
    {
        manipulationHost->PointerPressed +=
            ref new TypedEventHandler<DrawingSurfaceManipulationHost^, PointerEventArgs^>(this, &Direct3DInterop::OnPointerPressed);

        manipulationHost->PointerMoved +=
            ref new TypedEventHandler<DrawingSurfaceManipulationHost^, PointerEventArgs^>(this, &Direct3DInterop::OnPointerMoved);

        manipulationHost->PointerReleased +=
            ref new TypedEventHandler<DrawingSurfaceManipulationHost^, PointerEventArgs^>(this, &Direct3DInterop::OnPointerReleased);
    }

    void Direct3DInterop::RenderResolution::set(Windows::Foundation::Size renderResolution)
    {
        if (renderResolution.Width  != m_renderResolution.Width ||
            renderResolution.Height != m_renderResolution.Height)
        {
            m_renderResolution = renderResolution;

            if (m_renderer)
            {
                m_renderer->UpdateForRenderResolutionChange(m_renderResolution.Width, m_renderResolution.Height);
                RecreateSynchronizedTexture();
            }
        }
    }

    // Event Handlers

    void Direct3DInterop::OnPointerPressed(DrawingSurfaceManipulationHost^ sender, PointerEventArgs^ args)
    {
        // Insert your code here.
    }

    void Direct3DInterop::OnPointerMoved(DrawingSurfaceManipulationHost^ sender, PointerEventArgs^ args)
    {
        // Insert your code here.
    }

    void Direct3DInterop::OnPointerReleased(DrawingSurfaceManipulationHost^ sender, PointerEventArgs^ args)
    {
        // Insert your code here.
    }

    // Interface With Direct3DContentProvider
    HRESULT Direct3DInterop::Connect(_In_ IDrawingSurfaceRuntimeHostNative* host)
    {
        m_renderer = ref new CubeRenderer();
        m_renderer->Initialize();
        m_renderer->UpdateForWindowSizeChange(WindowBounds.Width, WindowBounds.Height);
        m_renderer->UpdateForRenderResolutionChange(m_renderResolution.Width, m_renderResolution.Height);

        // Restart timer after renderer has finished initializing.
        m_timer->Reset();

        return S_OK;
    }

    void Direct3DInterop::Disconnect()
    {
        m_renderer = nullptr;
    }

    HRESULT Direct3DInterop::PrepareResources(_In_ const LARGE_INTEGER* presentTargetTime, _Out_ BOOL* contentDirty)
    {
        *contentDirty = true;

        return S_OK;
    }

    HRESULT Direct3DInterop::GetTexture(_In_ const DrawingSurfaceSizeF* size, _Out_ IDrawingSurfaceSynchronizedTextureNative** synchronizedTexture, _Out_ DrawingSurfaceRectF* textureSubRectangle)
    {
        m_timer->Update();
        m_renderer->Update(m_timer->Total, m_timer->Delta);
        m_renderer->Render();

        RequestAdditionalFrame();

        return S_OK;
    }

    ID3D11Texture2D* Direct3DInterop::GetTexture()
    {
        return m_renderer->GetTexture();
    }

    void Direct3DInterop::CreateTexture(const Platform::Array<int>^  buffer,int width,int height, OCVFilterType filter)
    {
        if (m_renderer)
        {
            cv::Mat Lena = cv::Mat(height, width, CV_8UC4);
            memcpy(Lena.data, buffer->Data, 4 * height*width);

            switch (filter)
            {
                case OCVFilterType::ePreview:
                    break;

                case OCVFilterType::eGray:
                    ApplyGrayFilter(Lena);
                    break;

                case OCVFilterType::eCanny:
                    ApplyCannyFilter(Lena);
                    break;

                case OCVFilterType::eSepia:
                    ApplySepiaFilter(Lena);
                    break;
            }

            m_renderer->CreateTextureFromByte(Lena.data, width, height);
        }
    }

    byte* GetPointerToPixelData( Windows::Storage::Streams::IBuffer ^ pixelBuffer)
    {
        // Query the IBufferByteAccess interface.
        ComPtr<IBufferByteAccess> bufferByteAccess;
        reinterpret_cast<IInspectable*>( pixelBuffer)->QueryInterface(IID_PPV_ARGS(&bufferByteAccess));

        // Retrieve the buffer data.
        byte* pixels = nullptr;
        bufferByteAccess->Buffer(&pixels);
        return pixels;
    }

}