f4334277
 Hu Chunming
提交3rdparty
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//
// MainPage.xaml.cpp
// Implementation of the MainPage class.
//
#include "pch.h"
#include "MainPage.xaml.h"
#include <opencv2\imgproc\types_c.h>
#include <opencv2\core.hpp>
#include <opencv2\imgproc.hpp>
#include <Robuffer.h>
#include <ppl.h>
#include <ppltasks.h>
using namespace PhoneTutorial;
using namespace Platform;
using namespace Windows::Foundation;
using namespace Windows::Foundation::Collections;
using namespace Windows::UI::Xaml;
using namespace Windows::UI::Xaml::Controls;
using namespace Windows::UI::Xaml::Controls::Primitives;
using namespace Windows::UI::Xaml::Data;
using namespace Windows::UI::Xaml::Input;
using namespace Windows::UI::Xaml::Media;
using namespace Windows::UI::Xaml::Navigation;
using namespace Windows::UI::Xaml::Media::Imaging;
using namespace Windows::Storage::Streams;
using namespace Microsoft::WRL;
using namespace Windows::ApplicationModel;
MainPage::MainPage()
{
InitializeComponent();
}
/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached. The Parameter
/// property is typically used to configure the page.</param>
void MainPage::OnNavigatedTo(NavigationEventArgs^ e)
{
(void) e; // Unused parameter
LoadImage();
}
inline void ThrowIfFailed(HRESULT hr)
{
if (FAILED(hr))
{
throw Exception::CreateException(hr);
}
}
byte* GetPointerToPixelData(IBuffer^ buffer)
{
// Cast to Object^, then to its underlying IInspectable interface.
Object^ obj = buffer;
ComPtr<IInspectable> insp(reinterpret_cast<IInspectable*>(obj));
// Query the IBufferByteAccess interface.
ComPtr<IBufferByteAccess> bufferByteAccess;
ThrowIfFailed(insp.As(&bufferByteAccess));
// Retrieve the buffer data.
byte* pixels = nullptr;
ThrowIfFailed(bufferByteAccess->Buffer(&pixels));
return pixels;
}
void PhoneTutorial::MainPage::Process_Click(Platform::Object^ sender, Windows::UI::Xaml::RoutedEventArgs^ e)
{
(void) e; // Unused parameter
// get the pixels from the WriteableBitmap
byte* pPixels = GetPointerToPixelData(m_bitmap->PixelBuffer);
int height = m_bitmap->PixelHeight;
int width = m_bitmap->PixelWidth;
// create a matrix the size and type of the image
cv::Mat mat(width, height, CV_8UC4);
memcpy(mat.data, pPixels, 4 * height*width);
// convert to grayscale
cv::Mat intermediateMat;
cv::cvtColor(mat, intermediateMat, COLOR_RGB2GRAY);
// convert to BGRA
cv::cvtColor(intermediateMat, mat, COLOR_GRAY2BGRA);
// copy processed image back to the WriteableBitmap
memcpy(pPixels, mat.data, 4 * height*width);
// update the WriteableBitmap
m_bitmap->Invalidate();
}
void PhoneTutorial::MainPage::LoadImage()
{
Concurrency::task<Windows::Storage::StorageFile^> getFileTask(Package::Current->InstalledLocation->GetFileAsync(L"Lena.png"));
auto getStreamTask = getFileTask.then(
[](Windows::Storage::StorageFile ^storageFile)
{
return storageFile->OpenReadAsync();
});
getStreamTask.then(
[this](Windows::Storage::Streams::IRandomAccessStreamWithContentType^ stream)
{
m_bitmap = ref new Windows::UI::Xaml::Media::Imaging::WriteableBitmap(1, 1);
m_bitmap->SetSource(stream);
image->Source = m_bitmap;
});
}
void PhoneTutorial::MainPage::Reset_Click(Platform::Object^ sender, Windows::UI::Xaml::RoutedEventArgs^ e)
{
(void) e; // Unused parameter
LoadImage();
}
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