88 lines
2.7 KiB
C#
88 lines
2.7 KiB
C#
using System;
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using System.Drawing;
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/* Copyright (c) 2008-2014 DI Zimmermann Stephan (stefan.zimmermann@tele2.at)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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namespace GraphLib
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{
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public class BackBuffer
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{
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private Graphics graphics;
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private Bitmap memoryBitmap;
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private int width;
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private int height;
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public BackBuffer()
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{
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width = 0;
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height = 0;
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}
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public bool Init(Graphics g, int width, int height)
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{
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if (memoryBitmap != null)
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{
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memoryBitmap.Dispose();
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memoryBitmap = null;
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}
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if (graphics != null)
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{
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graphics.Dispose();
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graphics = null;
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}
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if (width == 0 || height == 0)
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return false;
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if ((width != this.width) || (height != this.height) || graphics == null)
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{
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this.width = width;
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this.height = height;
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memoryBitmap = new Bitmap(width, height);
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graphics = Graphics.FromImage(memoryBitmap);
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}
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return true;
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}
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public void Render(Graphics g)
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{
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if (memoryBitmap != null)
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{
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g.DrawImage(memoryBitmap,
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new Rectangle(0, 0, width, height),
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0, 0, width, height,
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GraphicsUnit.Pixel);
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}
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}
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public bool CanDoubleBuffer() { return graphics != null; }
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public Graphics Graphics { get { return graphics; } }
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}
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}
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