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123 lines
3.5 KiB
C++
123 lines
3.5 KiB
C++
//
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// MainPage.xaml.cpp
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// Implementation of the MainPage class.
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//
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#include "pch.h"
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#include "MainPage.xaml.h"
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#include <opencv2\imgproc\types_c.h>
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#include <opencv2\core\core.hpp>
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#include <opencv2\imgproc\imgproc.hpp>
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#include <Robuffer.h>
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#include <ppl.h>
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#include <ppltasks.h>
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using namespace PhoneTutorial;
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using namespace Platform;
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using namespace Windows::Foundation;
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using namespace Windows::Foundation::Collections;
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using namespace Windows::UI::Xaml;
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using namespace Windows::UI::Xaml::Controls;
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using namespace Windows::UI::Xaml::Controls::Primitives;
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using namespace Windows::UI::Xaml::Data;
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using namespace Windows::UI::Xaml::Input;
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using namespace Windows::UI::Xaml::Media;
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using namespace Windows::UI::Xaml::Navigation;
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using namespace Windows::UI::Xaml::Media::Imaging;
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using namespace Windows::Storage::Streams;
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using namespace Microsoft::WRL;
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using namespace Windows::ApplicationModel;
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MainPage::MainPage()
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{
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InitializeComponent();
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}
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/// <summary>
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/// Invoked when this page is about to be displayed in a Frame.
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/// </summary>
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/// <param name="e">Event data that describes how this page was reached. The Parameter
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/// property is typically used to configure the page.</param>
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void MainPage::OnNavigatedTo(NavigationEventArgs^ e)
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{
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(void) e; // Unused parameter
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LoadImage();
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}
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inline void ThrowIfFailed(HRESULT hr)
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{
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if (FAILED(hr))
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{
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throw Exception::CreateException(hr);
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}
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}
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byte* GetPointerToPixelData(IBuffer^ buffer)
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{
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// Cast to Object^, then to its underlying IInspectable interface.
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Object^ obj = buffer;
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ComPtr<IInspectable> insp(reinterpret_cast<IInspectable*>(obj));
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// Query the IBufferByteAccess interface.
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ComPtr<IBufferByteAccess> bufferByteAccess;
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ThrowIfFailed(insp.As(&bufferByteAccess));
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// Retrieve the buffer data.
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byte* pixels = nullptr;
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ThrowIfFailed(bufferByteAccess->Buffer(&pixels));
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return pixels;
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}
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void PhoneTutorial::MainPage::Process_Click(Platform::Object^ sender, Windows::UI::Xaml::RoutedEventArgs^ e)
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{
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(void) e; // Unused parameter
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// get the pixels from the WriteableBitmap
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byte* pPixels = GetPointerToPixelData(m_bitmap->PixelBuffer);
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int height = m_bitmap->PixelHeight;
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int width = m_bitmap->PixelWidth;
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// create a matrix the size and type of the image
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cv::Mat mat(width, height, CV_8UC4);
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memcpy(mat.data, pPixels, 4 * height*width);
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// convert to grayscale
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cv::Mat intermediateMat;
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cv::cvtColor(mat, intermediateMat, CV_RGB2GRAY);
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// convert to BGRA
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cv::cvtColor(intermediateMat, mat, CV_GRAY2BGRA);
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// copy processed image back to the WriteableBitmap
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memcpy(pPixels, mat.data, 4 * height*width);
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// update the WriteableBitmap
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m_bitmap->Invalidate();
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}
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void PhoneTutorial::MainPage::LoadImage()
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{
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Concurrency::task<Windows::Storage::StorageFile^> getFileTask(Package::Current->InstalledLocation->GetFileAsync(L"Lena.png"));
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auto getStreamTask = getFileTask.then(
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[](Windows::Storage::StorageFile ^storageFile)
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{
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return storageFile->OpenReadAsync();
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});
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getStreamTask.then(
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[this](Windows::Storage::Streams::IRandomAccessStreamWithContentType^ stream)
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{
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m_bitmap = ref new Windows::UI::Xaml::Media::Imaging::WriteableBitmap(1, 1);
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m_bitmap->SetSource(stream);
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image->Source = m_bitmap;
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});
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}
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void PhoneTutorial::MainPage::Reset_Click(Platform::Object^ sender, Windows::UI::Xaml::RoutedEventArgs^ e)
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{
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(void) e; // Unused parameter
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LoadImage();
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}
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