Jeremy Koritzinsky
10 years ago
8 changed files with 265 additions and 19 deletions
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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using System.Text; |
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using System.Threading.Tasks; |
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using Avalonia.Win32.Interop; |
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using SharpDX; |
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using SharpDX.DXGI; |
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namespace Avalonia.Direct2D1 |
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{ |
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class HwndRenderTarget : SwapChainRenderTarget |
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{ |
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private readonly IntPtr _hwnd; |
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public HwndRenderTarget(IntPtr hwnd) |
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{ |
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_hwnd = hwnd; |
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} |
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protected override SwapChain1 CreateSwapChain(Factory2 dxgiFactory, SwapChainDescription1 swapChainDesc) |
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{ |
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return new SwapChain1(dxgiFactory, Device, _hwnd, ref swapChainDesc); |
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} |
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protected override Size2F GetWindowDpi() |
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{ |
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if (UnmanagedMethods.ShCoreAvailable) |
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{ |
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uint dpix, dpiy; |
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var monitor = UnmanagedMethods.MonitorFromWindow( |
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_hwnd, |
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UnmanagedMethods.MONITOR.MONITOR_DEFAULTTONEAREST); |
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if (UnmanagedMethods.GetDpiForMonitor( |
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monitor, |
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UnmanagedMethods.MONITOR_DPI_TYPE.MDT_EFFECTIVE_DPI, |
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out dpix, |
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out dpiy) == 0) |
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{ |
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return new Size2F(dpix, dpiy); |
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} |
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} |
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return new Size2F(96, 96); |
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} |
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protected override Size2 GetWindowSize() |
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{ |
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UnmanagedMethods.RECT rc; |
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UnmanagedMethods.GetClientRect(_hwnd, out rc); |
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return new Size2(rc.right - rc.left, rc.bottom - rc.top); |
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} |
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} |
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} |
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@ -0,0 +1,134 @@ |
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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using System.Text; |
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using System.Threading.Tasks; |
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using Avalonia.Media; |
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using Avalonia.Platform; |
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using Avalonia.Win32.Interop; |
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using SharpDX; |
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using SharpDX.Direct2D1; |
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using SharpDX.DXGI; |
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using AlphaMode = SharpDX.Direct2D1.AlphaMode; |
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using Device = SharpDX.Direct2D1.Device; |
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using Factory = SharpDX.Direct2D1.Factory; |
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using Factory2 = SharpDX.DXGI.Factory2; |
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namespace Avalonia.Direct2D1 |
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{ |
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public abstract class SwapChainRenderTarget : IRenderTarget |
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{ |
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private Size2 _savedSize; |
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private Size2F _savedDpi; |
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private DeviceContext _deviceContext; |
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private SwapChain1 _swapChain; |
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protected SwapChainRenderTarget() |
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{ |
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Device = AvaloniaLocator.Current.GetService<SharpDX.DXGI.Device>(); |
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Direct2DFactory = AvaloniaLocator.Current.GetService<Factory>(); |
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DirectWriteFactory = AvaloniaLocator.Current.GetService<SharpDX.DirectWrite.Factory>(); |
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} |
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/// <summary>
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/// Gets the Direct2D factory.
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/// </summary>
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public Factory Direct2DFactory |
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{ |
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get; |
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} |
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/// <summary>
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/// Gets the DirectWrite factory.
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/// </summary>
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public SharpDX.DirectWrite.Factory DirectWriteFactory |
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{ |
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get; |
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} |
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protected SharpDX.DXGI.Device Device { get; } |
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/// <summary>
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/// Creates a drawing context for a rendering session.
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/// </summary>
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/// <returns>An <see cref="Avalonia.Media.DrawingContext"/>.</returns>
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public DrawingContext CreateDrawingContext() |
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{ |
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var size = GetWindowSize(); |
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var dpi = GetWindowDpi(); |
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if (size != _savedSize || dpi != _savedDpi) |
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{ |
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_savedSize = size; |
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_savedDpi = dpi; |
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CreateSwapChain(); |
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} |
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return new DrawingContext(new Media.DrawingContext(_deviceContext, DirectWriteFactory, _swapChain)); |
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} |
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public void Dispose() |
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{ |
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_deviceContext.Dispose(); |
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_swapChain.Dispose(); |
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} |
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private void CreateSwapChain() |
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{ |
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using (var d2dDevice = new Device(Device)) |
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using (var dxgiAdaptor = Device.Adapter) |
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using (var dxgiFactory = dxgiAdaptor.GetParent<Factory2>()) |
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{ |
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_deviceContext?.Dispose(); |
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_deviceContext = new DeviceContext(d2dDevice, DeviceContextOptions.None); |
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var swapChainDesc = new SwapChainDescription1 |
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{ |
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Width = _savedSize.Width, |
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Height = _savedSize.Height, |
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Format = Format.B8G8R8A8_UNorm, |
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Stereo = false, |
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SampleDescription = new SampleDescription |
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{ |
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Count = 1, |
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Quality = 0, |
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}, |
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Usage = Usage.RenderTargetOutput, |
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BufferCount = 2, |
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Scaling = Scaling.None, |
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SwapEffect = SwapEffect.FlipSequential, |
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Flags = 0, |
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}; |
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var dpi = Direct2DFactory.DesktopDpi; |
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_swapChain?.Dispose(); |
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_swapChain = CreateSwapChain(dxgiFactory, swapChainDesc); |
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using (var dxgiBackBuffer = _swapChain.GetBackBuffer<Surface>(0)) |
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using (var d2dBackBuffer = new Bitmap1( |
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_deviceContext, |
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dxgiBackBuffer, |
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new BitmapProperties1( |
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new PixelFormat |
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{ |
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AlphaMode = AlphaMode.Ignore, |
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Format = Format.B8G8R8A8_UNorm |
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}, |
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_savedDpi.Width, |
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_savedDpi.Height, |
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BitmapOptions.Target | BitmapOptions.CannotDraw))) |
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{ |
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_deviceContext.Target = d2dBackBuffer; |
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} |
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} |
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} |
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protected abstract SwapChain1 CreateSwapChain(Factory2 dxgiFactory, SwapChainDescription1 swapChainDesc); |
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protected abstract Size2F GetWindowDpi(); |
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protected abstract Size2 GetWindowSize(); |
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} |
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} |
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@ -1,6 +1,7 @@ |
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<?xml version="1.0" encoding="utf-8"?> |
<?xml version="1.0" encoding="utf-8"?> |
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<packages> |
<packages> |
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<package id="SharpDX" version="3.1.0" targetFramework="net45" /> |
<package id="SharpDX" version="3.1.1" targetFramework="net45" /> |
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<package id="SharpDX.Direct2D1" version="3.1.0" targetFramework="net45" /> |
<package id="SharpDX.Direct2D1" version="3.1.1" targetFramework="net45" /> |
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<package id="SharpDX.DXGI" version="3.1.0" targetFramework="net45" /> |
<package id="SharpDX.Direct3D11" version="3.1.1" targetFramework="net45" /> |
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<package id="SharpDX.DXGI" version="3.1.1" targetFramework="net45" /> |
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</packages> |
</packages> |
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