103 lines
2.3 KiB
C#
103 lines
2.3 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2010 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation. For more information,
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* see LICENSE.
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*/
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#endregion
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using System.Drawing;
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namespace OpenRA.Graphics
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{
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public class SheetBuilder
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{
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internal SheetBuilder(TextureChannel ch)
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{
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current = null;
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rowHeight = 0;
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channel = null;
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initialChannel = ch;
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}
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public Sprite Add(byte[] src, Size size)
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{
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Sprite rect = Allocate(size);
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Util.FastCopyIntoChannel(rect, src);
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return rect;
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}
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public Sprite Add(Size size, byte paletteIndex)
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{
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byte[] data = new byte[size.Width * size.Height];
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for (int i = 0; i < data.Length; i++)
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data[i] = paletteIndex;
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return Add(data, size);
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}
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Sheet NewSheet() { return new Sheet(new Size( Renderer.SheetSize, Renderer.SheetSize ) ); }
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Sheet current = null;
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int rowHeight = 0;
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Point p;
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TextureChannel? channel = null;
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TextureChannel initialChannel;
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TextureChannel? NextChannel(TextureChannel? t)
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{
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if (t == null)
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return initialChannel;
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switch (t.Value)
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{
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case TextureChannel.Red: return TextureChannel.Green;
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case TextureChannel.Green: return TextureChannel.Blue;
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case TextureChannel.Blue: return TextureChannel.Alpha;
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case TextureChannel.Alpha: return null;
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default: return null;
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}
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}
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public Sprite Allocate(Size imageSize)
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{
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if (current == null)
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{
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current = NewSheet();
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channel = NextChannel(null);
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}
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if (imageSize.Width + p.X > current.Size.Width)
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{
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p = new Point(0, p.Y + rowHeight);
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rowHeight = imageSize.Height;
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}
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if (imageSize.Height > rowHeight)
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rowHeight = imageSize.Height;
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if (p.Y + imageSize.Height > current.Size.Height)
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{
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if (null == (channel = NextChannel(channel)))
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{
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current = NewSheet();
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channel = NextChannel(channel);
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}
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rowHeight = imageSize.Height;
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p = new Point(0,0);
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}
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Sprite rect = new Sprite(current, new Rectangle(p, imageSize), channel.Value);
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current.MakeDirty();
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p.X += imageSize.Width;
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return rect;
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}
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}
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}
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