From c0448fce3e1f183145a5967b56105052821febbc Mon Sep 17 00:00:00 2001
From: reaperrr <thereaperrr@aol.com>
Date: Tue, 31 Mar 2015 20:44:31 +0200
Subject: [PATCH] Adds two new BlendModes.

---
 OpenRA.Game/Graphics/IGraphicsDevice.cs    | 13 ++++++++++-
 OpenRA.Renderer.Sdl2/Sdl2GraphicsDevice.cs | 26 ++++++++++++++++++++++
 2 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/OpenRA.Game/Graphics/IGraphicsDevice.cs b/OpenRA.Game/Graphics/IGraphicsDevice.cs
index 3dde38bad4..fcb356aad0 100755
--- a/OpenRA.Game/Graphics/IGraphicsDevice.cs
+++ b/OpenRA.Game/Graphics/IGraphicsDevice.cs
@@ -34,7 +34,18 @@ namespace OpenRA
 
 	public interface IHardwareCursor : IDisposable { }
 
-	public enum BlendMode : byte { None, Alpha, Additive, Subtractive, Multiply }
+	public enum BlendMode : byte
+	{
+		None,
+		Alpha,
+		Additive,
+		Subtractive,
+		Multiply,
+		SoftAdditive,
+		Translucency25,
+		Translucency50,
+		Translucency75
+	}
 
 	public interface IGraphicsDevice : IDisposable
 	{
diff --git a/OpenRA.Renderer.Sdl2/Sdl2GraphicsDevice.cs b/OpenRA.Renderer.Sdl2/Sdl2GraphicsDevice.cs
index 736270c017..2c866d194f 100755
--- a/OpenRA.Renderer.Sdl2/Sdl2GraphicsDevice.cs
+++ b/OpenRA.Renderer.Sdl2/Sdl2GraphicsDevice.cs
@@ -241,6 +241,32 @@ namespace OpenRA.Renderer.Sdl2
 					GL.BlendFuncSeparate(BlendingFactorSrc.DstColor, BlendingFactorDest.Zero, BlendingFactorSrc.One, BlendingFactorDest.OneMinusSrcAlpha);
 					ErrorHandler.CheckGlError();
 					break;
+				case BlendMode.SoftAdditive:
+					GL.Enable(EnableCap.Blend);
+					ErrorHandler.CheckGlError();
+					GL.BlendFunc(BlendingFactorSrc.OneMinusDstColor, BlendingFactorDest.One);
+					break;
+				case BlendMode.Translucency25:
+					GL.Enable(EnableCap.Blend);
+					ErrorHandler.CheckGlError();
+					GL.BlendFunc(BlendingFactorSrc.OneMinusConstantAlpha, BlendingFactorDest.One);
+					ErrorHandler.CheckGlError();
+					GL.BlendColor(1f, 1f, 1f, 0.25f);
+					break;
+				case BlendMode.Translucency50:
+					GL.Enable(EnableCap.Blend);
+					ErrorHandler.CheckGlError();
+					GL.BlendFunc(BlendingFactorSrc.OneMinusConstantAlpha, BlendingFactorDest.One);
+					ErrorHandler.CheckGlError();
+					GL.BlendColor(1f, 1f, 1f, 0.5f);
+					break;
+				case BlendMode.Translucency75:
+					GL.Enable(EnableCap.Blend);
+					ErrorHandler.CheckGlError();
+					GL.BlendFunc(BlendingFactorSrc.OneMinusConstantAlpha, BlendingFactorDest.One);
+					ErrorHandler.CheckGlError();
+					GL.BlendColor(1f, 1f, 1f, 0.75f);
+					break;
 			}
 
 			ErrorHandler.CheckGlError();