Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Game/Graphics/UISpriteRenderable.cs

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+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using OpenRA.Primitives;
+
+namespace OpenRA.Graphics
+{
+	public class UISpriteRenderable : IRenderable, IPalettedRenderable, IFinalizedRenderable
+	{
+		readonly Sprite sprite;
+		readonly int2 screenPos;
+		readonly float scale;
+		readonly float alpha;
+		readonly float rotation = 0f;
+
+		public UISpriteRenderable(Sprite sprite, WPos effectiveWorldPos, int2 screenPos, int zOffset, PaletteReference palette,
+			float scale = 1f, float alpha = 1f, float rotation = 0f)
+		{
+			this.sprite = sprite;
+			Pos = effectiveWorldPos;
+			this.screenPos = screenPos;
+			ZOffset = zOffset;
+			Palette = palette;
+			this.scale = scale;
+			this.alpha = alpha;
+			this.rotation = rotation;
+
+			// PERF: Remove useless palette assignments for RGBA sprites
+			// HACK: This is working around the fact that palettes are defined on traits rather than sequences
+			// and can be removed once this has been fixed
+			if (sprite.Channel == TextureChannel.RGBA && !(palette?.HasColorShift ?? false))
+				Palette = null;
+		}
+
+		// Does not exist in the world, so a world positions don't make sense
+		public WPos Pos { get; }
+		public WVec Offset => WVec.Zero;
+		public bool IsDecoration => true;
+
+		public PaletteReference Palette { get; }
+		public int ZOffset { get; }
+
+		public IPalettedRenderable WithPalette(PaletteReference newPalette) =>
+			new UISpriteRenderable(sprite, Pos, screenPos, ZOffset, newPalette, scale, alpha, rotation);
+		public IRenderable WithZOffset(int newOffset) { return this; }
+		public IRenderable OffsetBy(in WVec vec) { return this; }
+		public IRenderable AsDecoration() { return this; }
+
+		public IFinalizedRenderable PrepareRender(WorldRenderer wr) { return this; }
+		public void Render(WorldRenderer wr)
+		{
+			Game.Renderer.SpriteRenderer.DrawSprite(sprite, Palette, screenPos, scale, float3.Ones, alpha, rotation);
+		}
+
+		public void RenderDebugGeometry(WorldRenderer wr)
+		{
+			var offset = screenPos + sprite.Offset.XY;
+			if (rotation == 0f)
+				Game.Renderer.RgbaColorRenderer.DrawRect(offset, offset + sprite.Size.XY, 1, Color.Red);
+			else
+				Game.Renderer.RgbaColorRenderer.DrawPolygon(Util.RotateQuad(offset, sprite.Size, rotation), 1, Color.Red);
+		}
+
+		public Rectangle ScreenBounds(WorldRenderer wr)
+		{
+			var offset = screenPos + sprite.Offset;
+			return Util.BoundingRectangle(offset, sprite.Size, rotation);
+		}
+	}
+}