1 #region Copyright & License Information
2 /*
3  * Copyright 2007-2020 The OpenRA Developers (see AUTHORS)
4  * This file is part of OpenRA, which is free software. It is made
5  * available to you under the terms of the GNU General Public License
6  * as published by the Free Software Foundation, either version 3 of
7  * the License, or (at your option) any later version. For more
8  * information, see COPYING.
9  */
10 #endregion
11 
12 using System;
13 using OpenRA.Graphics;
14 using OpenRA.Primitives;
15 using OpenRA.Widgets;
16 
17 namespace OpenRA.Mods.Common.Widgets
18 {
19 	public class TerrainTemplatePreviewWidget : Widget
20 	{
21 		public Func<float> GetScale = () => 1f;
22 
23 		readonly WorldRenderer worldRenderer;
24 		readonly TileSet tileset;
25 
26 		TerrainTemplateInfo template;
27 		Rectangle bounds;
28 
29 		public TerrainTemplateInfo Template
30 		{
31 			get
32 			{
33 				return template;
34 			}
35 
36 			set
37 			{
38 				template = value;
39 				if (template == null)
40 					return;
41 
42 				var grid = Game.ModData.Manifest.Get<MapGrid>();
43 				bounds = worldRenderer.Theater.TemplateBounds(template, grid.TileSize, grid.Type);
44 			}
45 		}
46 
47 		[ObjectCreator.UseCtor]
TerrainTemplatePreviewWidget(WorldRenderer worldRenderer, World world)48 		public TerrainTemplatePreviewWidget(WorldRenderer worldRenderer, World world)
49 		{
50 			this.worldRenderer = worldRenderer;
51 			tileset = world.Map.Rules.TileSet;
52 		}
53 
TerrainTemplatePreviewWidget(TerrainTemplatePreviewWidget other)54 		protected TerrainTemplatePreviewWidget(TerrainTemplatePreviewWidget other)
55 			: base(other)
56 		{
57 			worldRenderer = other.worldRenderer;
58 			tileset = other.worldRenderer.World.Map.Rules.TileSet;
59 			Template = other.Template;
60 			GetScale = other.GetScale;
61 		}
62 
Clone()63 		public override Widget Clone() { return new TerrainTemplatePreviewWidget(this); }
64 
Draw()65 		public override void Draw()
66 		{
67 			if (template == null)
68 				return;
69 
70 			var grid = Game.ModData.Manifest.Get<MapGrid>();
71 			var ts = grid.TileSize;
72 			var gridType = grid.Type;
73 			var scale = GetScale();
74 
75 			var sb = new Rectangle((int)(scale * bounds.X), (int)(scale * bounds.Y), (int)(scale * bounds.Width), (int)(scale * bounds.Height));
76 			var origin = RenderOrigin + new int2((RenderBounds.Size.Width - sb.Width) / 2 - sb.X, (RenderBounds.Size.Height - sb.Height) / 2 - sb.Y);
77 
78 			var i = 0;
79 			for (var y = 0; y < Template.Size.Y; y++)
80 			{
81 				for (var x = 0; x < Template.Size.X; x++)
82 				{
83 					var tile = new TerrainTile(Template.Id, (byte)(i++));
84 					var tileInfo = tileset.GetTileInfo(tile);
85 
86 					// Empty tile
87 					if (tileInfo == null)
88 						continue;
89 
90 					var sprite = worldRenderer.Theater.TileSprite(tile, 0);
91 					var size = new float2(sprite.Size.X * scale, sprite.Size.Y * scale);
92 
93 					var u = gridType == MapGridType.Rectangular ? x : (x - y) / 2f;
94 					var v = gridType == MapGridType.Rectangular ? y : (x + y) / 2f;
95 					var pos = origin + scale * (new float2(u * ts.Width, (v - 0.5f * tileInfo.Height) * ts.Height) - 0.5f * sprite.Size);
96 					var palette = Template.Palette ?? TileSet.TerrainPaletteInternalName;
97 					Game.Renderer.SpriteRenderer.DrawSprite(sprite, pos, worldRenderer.Palette(palette), size);
98 				}
99 			}
100 		}
101 	}
102 }
103