76 строки
2.4 KiB
C#
76 строки
2.4 KiB
C#
//
|
|
// ImageBuilderBackendHandler.cs
|
|
//
|
|
// Author:
|
|
// Eric Maupin <ermau@xamarin.com>
|
|
//
|
|
// Copyright (c) 2012 Xamarin, Inc.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
// THE SOFTWARE.
|
|
|
|
using Xwt.Backends;
|
|
using Xwt.Drawing;
|
|
using System.Windows.Media;
|
|
using System.Windows.Media.Imaging;
|
|
|
|
namespace Xwt.WPFBackend
|
|
{
|
|
public class WpfImageBuilderBackendHandler
|
|
: ImageBuilderBackendHandler
|
|
{
|
|
class ImageBuilder: DrawingVisual
|
|
{
|
|
public int Width;
|
|
public int Height;
|
|
public DrawingContext Context;
|
|
}
|
|
|
|
public override object CreateImageBuilder (int width, int height, ImageFormat format)
|
|
{
|
|
return new ImageBuilder () {
|
|
Width = width,
|
|
Height = height
|
|
};
|
|
}
|
|
|
|
public override object CreateContext (object backend)
|
|
{
|
|
var visual = (ImageBuilder)backend;
|
|
visual.Context = new DrawingContext (visual.RenderOpen (), visual.GetScaleFactor ());
|
|
return visual.Context;
|
|
}
|
|
|
|
public override object CreateImage (object backend)
|
|
{
|
|
var visual = (ImageBuilder)backend;
|
|
var ratios = visual.GetPixelRatios ();
|
|
visual.Context.Dispose ();
|
|
var bmp = new RenderTargetBitmap (visual.Width, visual.Height, ratios.Height * 96, ratios.Width * 96, PixelFormats.Pbgra32);
|
|
bmp.Render(visual);
|
|
return new WpfImage (bmp);
|
|
}
|
|
|
|
public override void Dispose (object backend)
|
|
{
|
|
var bmp = (ImageBuilder)backend;
|
|
bmp.Context.Dispose ();
|
|
}
|
|
}
|
|
}
|