基於VisualStudio11開發Windows8的Direct2D-Metro應用程式範例（1）hello world

 

Direct2D是美國微軟公司用來取代 DirectDraw 以及GDI, GDI+等新技術[1]，主要提供2D 動畫的硬體加速，目前只支援 Windows Vista SP2以及Windows 7以上[2]。
 
Direct2D技術架構於Direct3D 10.1 API 之上，能夠透過硬體加速功能來建立2D圖形，而且完全支援透明和Alpha混合。Direct2D 亦支援軟體實現（Software rasterizer），亦即在顯卡不支援硬體加速情況下，Direct2D 仍可以使用軟體方式描繪，且效果仍優於GDI。
 
Direct2D 可以使用DXGI（DirectX Graphics Infrastructure） 與互動操作，Direct2D還能很好的支援DirectWrite。
 
Direct2D的支援高品質的渲染，具有以下特點：
 支援ClearType 文字的呈現方式（DirectWrite 提供）
 消除原圖鋸齒狀（Per primitive antialiasing）
 幾何形狀（直線，曲線）和位元影像繪製和填寫。
 純色（Solid color）、線性。
 描繪中介層。
 多元的幾何操作（如unions, intersections, widening, outlining等）

在微軟VS11提供了Direct模板

 

我們建立一個應用程式以後，

插入下列代碼

請見程式碼分析

#include "pch.h"#include "DWriteHelloWorld.h"using namespace Microsoft::WRL;using namespace Windows::ApplicationModel;using namespace Windows::ApplicationModel::Core;using namespace Windows::ApplicationModel::Activation;using namespace Windows::UI::Core;using namespace Windows::System;using namespace Windows::Foundation;using namespace Windows::Graphics::Display;DWriteHelloWorld::DWriteHelloWorld(){}void DWriteHelloWorld::CreateDeviceIndependentResources(){    DirectXBase::CreateDeviceIndependentResources();        DX::ThrowIfFailed(        m_dwriteFactory->CreateTextFormat(            L"Gabriola",            nullptr,            DWRITE_FONT_WEIGHT_REGULAR,            DWRITE_FONT_STYLE_NORMAL,            DWRITE_FONT_STRETCH_NORMAL,            64.0f,            L"en-US", //locale            &m_textFormat            )        );    // Center the text horizontally and vertically.    m_textFormat->SetTextAlignment(DWRITE_TEXT_ALIGNMENT_CENTER);    m_textFormat->SetParagraphAlignment(DWRITE_PARAGRAPH_ALIGNMENT_CENTER);}void DWriteHelloWorld::CreateDeviceResources(){    DirectXBase::CreateDeviceResources();    m_sampleOverlay = ref new SampleOverlay();    m_sampleOverlay->Initialize(        m_d2dDevice.Get(),        m_d2dContext.Get(),        m_wicFactory.Get(),        m_dwriteFactory.Get(),        "D2D Hello World sample by Microsoft MVP Yincheng"        );    DX::ThrowIfFailed(        m_d2dContext->CreateSolidColorBrush(            D2D1::ColorF(D2D1::ColorF::Black),            &m_blackBrush            )        );}void DWriteHelloWorld::CreateWindowSizeDependentResources(){    DirectXBase::CreateWindowSizeDependentResources();    Platform::String^ text = "Hello World By Microsoft MVP -Yincheng!";    D2D1_SIZE_F size = m_d2dContext->GetSize();    //建立文本輸出裝置    DX::ThrowIfFailed(        m_dwriteFactory->CreateTextLayout(            text->Data(),                                   text->Length(),                                 m_textFormat.Get(),                             size.width,                                    size.height,                                    &m_textLayout            )        );    DWRITE_TEXT_RANGE textRange = {21, 12};     //設定文字大小    m_textLayout->SetFontSize(100.0f, textRange);    //建立圖形文字顯示裝置    DX::ThrowIfFailed(        m_dwriteFactory->CreateTypography(            &m_textTypography            )        );    DWRITE_FONT_FEATURE fontFeature = {DWRITE_FONT_FEATURE_TAG_STYLISTIC_SET_6, 1};    m_textTypography->AddFontFeature(fontFeature);    //移動文字的長度    textRange.length = text->Length();    textRange.startPosition = 0;    //顯示文字    DX::ThrowIfFailed(        m_textLayout->SetTypography(            m_textTypography.Get(),            textRange            )        );    //設定文字的長度與開始位置    textRange.length = 12;    textRange.startPosition = 21;    //設定水平線    m_textLayout->SetUnderline(TRUE, textRange);    m_textLayout->SetFontWeight(DWRITE_FONT_WEIGHT_BOLD, textRange);}void DWriteHelloWorld::Render(){    m_d2dContext->BeginDraw();    m_d2dContext->Clear(D2D1::ColorF(D2D1::ColorF::CornflowerBlue));    m_d2dContext->SetTransform(D2D1::Matrix3x2F::Identity());    m_d2dContext->DrawTextLayout(        D2D1::Point2F(0.0f, 0.0f),        m_textLayout.Get(),        m_blackBrush.Get()        );    HRESULT hr = m_d2dContext->EndDraw();    if (hr == D2DERR_RECREATE_TARGET)    {        m_d2dContext->SetTarget(nullptr);        m_d2dTargetBitmap = nullptr;        CreateWindowSizeDependentResources();    }    else    {        DX::ThrowIfFailed(hr);    }    m_sampleOverlay->Render();}void DWriteHelloWorld::Initialize(    _In_ CoreApplicationView^ applicationView    ){    applicationView->Activated +=        ref new TypedEventHandler<CoreApplicationView^, IActivatedEventArgs^>(this, &DWriteHelloWorld::OnActivated);    CoreApplication::Suspending +=        ref new EventHandler<SuspendingEventArgs^>(this, &DWriteHelloWorld::OnSuspending);    CoreApplication::Resuming +=        ref new EventHandler<Platform::Object^>(this, &DWriteHelloWorld::OnResuming);}void DWriteHelloWorld::SetWindow(    _In_ CoreWindow^ window    ){    window->PointerCursor = ref new CoreCursor(CoreCursorType::Arrow, 0);    window->SizeChanged +=        ref new TypedEventHandler<CoreWindow^, WindowSizeChangedEventArgs^>(this, &DWriteHelloWorld::OnWindowSizeChanged);    DisplayProperties::LogicalDpiChanged +=        ref new DisplayPropertiesEventHandler(this, &DWriteHelloWorld::OnLogicalDpiChanged);    DirectXBase::Initialize(window, DisplayProperties::LogicalDpi);}void DWriteHelloWorld::Load(    Platform::String^ entryPoint    ){}void DWriteHelloWorld::Run(){    Render();    Present();    m_window->Dispatcher->ProcessEvents(CoreProcessEventsOption::ProcessUntilQuit);}void DWriteHelloWorld::Uninitialize(){}void DWriteHelloWorld::OnWindowSizeChanged(    _In_ CoreWindow^ sender,    _In_ WindowSizeChangedEventArgs^ args    ){    UpdateForWindowSizeChange();    m_sampleOverlay->UpdateForWindowSizeChange();    Render();    Present();}void DWriteHelloWorld::OnLogicalDpiChanged(    _In_ Platform::Object^ sender    ){    SetDpi(DisplayProperties::LogicalDpi);    Render();    Present();}void DWriteHelloWorld::OnActivated(    _In_ CoreApplicationView^ applicationView,    _In_ IActivatedEventArgs^ args    ){    m_window->Activate();}void DWriteHelloWorld::OnSuspending(    _In_ Platform::Object^ sender,    _In_ SuspendingEventArgs^ args    ){}void DWriteHelloWorld::OnResuming(    _In_ Platform::Object^ sender,    _In_ Platform::Object^ args    ){}IFrameworkView^ DirectXAppSource::CreateView(){    return ref new DWriteHelloWorld();}[Platform::MTAThread]int main(Platform::Array<Platform::String^>^){    auto directXAppSource = ref new DirectXAppSource();    CoreApplication::Run(directXAppSource);    return 0;}

 

 

趕緊下載VS11體驗吧

http://www.microsoft.com/click/services/Redirect2.ashx?CR_CC=200098144