using System;
using System.Drawing;
/* Copyright (c) 2008,2009 DI Zimmermann Stephan (stefan.zimmermann@tele2.at)
*
* 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.
*/
namespace GraphLib
{
public class BackBuffer
{
private Graphics graphics;
private Bitmap memoryBitmap;
private int width;
private int height;
public BackBuffer()
{
width = 0;
height = 0;
}
public bool Init(Graphics g, int width, int height)
{
if (memoryBitmap != null)
{
memoryBitmap.Dispose();
memoryBitmap = null;
}
if (graphics != null)
{
graphics.Dispose();
graphics = null;
}
if (width == 0 || height == 0)
return false;
if ((width != this.width) ||
(height != this.height) ||
graphics == null)
{
this.width = width;
this.height = height;
memoryBitmap = new Bitmap(width, height);
graphics = Graphics.FromImage(memoryBitmap);
}
return true;
}
public void Render(Graphics g)
{
if (memoryBitmap != null)
{
g.DrawImage(memoryBitmap,
new Rectangle(0, 0, width, height),
0, 0, width, height,
GraphicsUnit.Pixel);
}
}
public bool CanDoubleBuffer()
{
return graphics != null;
}
public Graphics g
{
get
{
return graphics;
}
}
}
}