108 lines
2.2 KiB
C#
108 lines
2.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Drawing;
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namespace OpenRa.FileFormats
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{
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public delegate T Provider<T>();
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public class TileSheetBuilder<T>
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where T : class
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{
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readonly Size pageSize;
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readonly Provider<T> pageProvider;
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public TileSheetBuilder(Size pageSize, Provider<T> pageProvider)
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{
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this.pageSize = pageSize;
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this.pageProvider = pageProvider;
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}
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T current = null;
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int x = 0, y = 0, rowHeight = 0;
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TextureChannel? channel;
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TextureChannel? NextChannel(TextureChannel? t)
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{
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if (t == null)
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return TextureChannel.Red;
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if (t == TextureChannel.Red)
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return TextureChannel.Green;
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if (t == TextureChannel.Green)
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return TextureChannel.Blue;
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if (t == TextureChannel.Blue)
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return TextureChannel.Alpha;
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return null;
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}
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public SheetRectangle<T> AddImage(Size imageSize)
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{
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if (imageSize.Width > pageSize.Width || imageSize.Height > pageSize.Height)
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return null;
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if (current == null)
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{
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current = pageProvider();
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channel = NextChannel(null);
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}
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if (rowHeight == 0 || imageSize.Width + x > pageSize.Width)
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{
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y += rowHeight;
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rowHeight = imageSize.Height;
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x = 0;
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}
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if (imageSize.Height > rowHeight)
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rowHeight = imageSize.Height;
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if (y + imageSize.Height > pageSize.Height)
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{
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if (null == (channel = NextChannel(channel)))
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{
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current = pageProvider();
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channel = NextChannel(channel);
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}
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x = y = rowHeight = 0;
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}
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SheetRectangle<T> rect = new SheetRectangle<T>(current, new Point(x, y), imageSize, channel.Value);
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x += imageSize.Width;
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return rect;
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}
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}
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public class SheetRectangle<T>
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where T : class
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{
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public readonly Point origin;
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public readonly Size size;
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public readonly T sheet;
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public readonly TextureChannel channel;
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internal SheetRectangle(T sheet, Point origin, Size size, TextureChannel channel)
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{
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this.origin = origin;
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this.size = size;
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this.sheet = sheet;
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this.channel = channel;
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}
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}
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public enum TextureChannel
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{
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Red,
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Green,
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Blue,
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Alpha,
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}
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}
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