From 96e2c9bb797aefefa8403c5585841af44170a891 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matthias=20Mail=C3=A4nder?= <matthias@mailaender.name>
Date: Mon, 25 May 2015 13:39:38 +0200
Subject: [PATCH] use premultiplied alpha on geometric renderers

to fix transparency again
---
 OpenRA.Game/Graphics/LineRenderer.cs | 4 ++++
 OpenRA.Game/Graphics/QuadRenderer.cs | 1 +
 2 files changed, 5 insertions(+)

diff --git a/OpenRA.Game/Graphics/LineRenderer.cs b/OpenRA.Game/Graphics/LineRenderer.cs
index 6ed142fdcc..75260e484b 100644
--- a/OpenRA.Game/Graphics/LineRenderer.cs
+++ b/OpenRA.Game/Graphics/LineRenderer.cs
@@ -83,6 +83,7 @@ namespace OpenRA.Graphics
 			if (nv + 2 > renderer.TempBufferSize)
 				Flush();
 
+			color = Util.PremultiplyAlpha(color);
 			var r = color.R / 255.0f;
 			var g = color.G / 255.0f;
 			var b = color.B / 255.0f;
@@ -98,12 +99,14 @@ namespace OpenRA.Graphics
 			if (nv + 2 > renderer.TempBufferSize)
 				Flush();
 
+			startColor = Util.PremultiplyAlpha(startColor);
 			var r = startColor.R / 255.0f;
 			var g = startColor.G / 255.0f;
 			var b = startColor.B / 255.0f;
 			var a = startColor.A / 255.0f;
 			vertices[nv++] = new Vertex(start + Offset, r, g, b, a);
 
+			endColor = Util.PremultiplyAlpha(endColor);
 			r = endColor.R / 255.0f;
 			g = endColor.G / 255.0f;
 			b = endColor.B / 255.0f;
@@ -115,6 +118,7 @@ namespace OpenRA.Graphics
 		{
 			renderer.CurrentBatchRenderer = this;
 
+			color = Util.PremultiplyAlpha(color);
 			var r = color.R / 255.0f;
 			var g = color.G / 255.0f;
 			var b = color.B / 255.0f;
diff --git a/OpenRA.Game/Graphics/QuadRenderer.cs b/OpenRA.Game/Graphics/QuadRenderer.cs
index 0cce401aa5..edec7ecd3f 100644
--- a/OpenRA.Game/Graphics/QuadRenderer.cs
+++ b/OpenRA.Game/Graphics/QuadRenderer.cs
@@ -51,6 +51,7 @@ namespace OpenRA.Graphics
 			if (nv + 4 > renderer.TempBufferSize)
 				Flush();
 
+			color = Util.PremultiplyAlpha(color);
 			var r = color.R / 255.0f;
 			var g = color.G / 255.0f;
 			var b = color.B / 255.0f;