private void Begin(SharpDX.Matrix3x2 transform)
{
this.context = D2DFactory.Instance.GetContext(this.GraphicsDevice);
if (this.context == null)
{
throw new Exception("Create D2D context failed.");
}
this.context.D2DRenderTarget.Transform = transform;
this.context.D2DRenderTarget.BeginDraw();
this.IsBeginEndPair = true;
}
internal void DrawText(D2DContext context, string text, Vector2 position, Vector2 size, Color color)
{
var rt = context.D2DRenderTarget;
using (var layout = this.LayoutString(text, size.X, size.Y))
{
rt.DrawTextLayout(new SharpDX.Vector2(position.X, position.Y),
layout,
context.GetBrush(color),
DrawTextOptions.None);
}
}
public D2DContext GetContext(GraphicsDevice graphicsDevice)
{
SharpDX.ComObject obj = GetRenderTargetResource(graphicsDevice);
D2DContext context = GetOrCreateContext(obj);
if (context == null)
{
return(null);
}
AlphaMode alphaMode = AlphaMode.Ignore;
if (context.DxgiSurface == null || context.DxgiSurface.IsDisposed)
{
if (obj is SharpDX.DXGI.SwapChain)
{
var swapChain = (SharpDX.DXGI.SwapChain)obj;
context.DxgiSurface = SharpDX.DXGI.Surface.FromSwapChain(swapChain, 0);
alphaMode = AlphaMode.Ignore;
}
else if (obj is SharpDX.Direct3D11.Resource)
{
context.DxgiSurface = obj.QueryInterface <SharpDX.DXGI.Surface>();
alphaMode = AlphaMode.Premultiplied;
}
else
{
return(null);
}
}
if (context.D2DRenderTarget == null || context.D2DRenderTarget.IsDisposed)
{
var rtProp = new RenderTargetProperties(new PixelFormat(SharpDX.DXGI.Format.Unknown, alphaMode));
var d2drt = new RenderTarget(this.factory2D, context.DxgiSurface, rtProp);
d2drt.TextRenderingParams = new RenderingParams(factoryDWrite, 1f, 0f, 0f, PixelGeometry.Flat, RenderingMode.CleartypeGdiClassic);
d2drt.TextAntialiasMode = SharpDX.Direct2D1.TextAntialiasMode.Grayscale;
context.D2DRenderTarget = d2drt;
context.DxgiSurface.Disposing += (o, e) => d2drt.Dispose();
}
return(context);
}
private D2DContext GetOrCreateContext(SharpDX.ComObject comObject)
{
if (comObject == null)
{
return null;
}
if (comObject.IsDisposed)
{
dictContext.Remove(comObject);
return null;
}
D2DContext context;
if (!this.dictContext.TryGetValue(comObject, out context))
{
context = new D2DContext();
comObject.Disposing += ComObject_Disposing;
this.dictContext.Add(comObject, context);
}
return context;
}
internal void DrawText(D2DContext context, string text, Vector2 position, Color color)
{
this.DrawText(context, text, position, Vector2.Zero, color);
}
