From 20cff5b6fe91a72c3ed5d287cfb73e51e2ab350d Mon Sep 17 00:00:00 2001
From: vortex <vortex@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Mon, 9 May 2011 11:28:12 +0000
Subject: [PATCH] Move Alpha-To-Coverage stuff to gl_backend.c, fix bug with
 shadows rendering.

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@11139 d7cf8633-e32d-0410-b094-e92efae38249
---
 gl_backend.c |  8 ++++++++
 gl_rmain.c   | 16 ++++------------
 r_shadow.c   |  3 ++-
 3 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/gl_backend.c b/gl_backend.c
index 6fc886ba..e8d2e640 100644
--- a/gl_backend.c
+++ b/gl_backend.c
@@ -2155,6 +2155,14 @@ void GL_AlphaTest(int state)
 			break;
 		case RENDERPATH_GL20:
 		case RENDERPATH_GLES2:
+			if (vid_multisampling.integer)
+			{
+				if (gl_state.alphatest && r_transparent_alphatocoverage.integer)
+					qglEnable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
+				else
+					qglDisable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
+				CHECKGLERROR
+			}
 			break;
 		}
 	}
diff --git a/gl_rmain.c b/gl_rmain.c
index 996fd2d9..eee8a48f 100644
--- a/gl_rmain.c
+++ b/gl_rmain.c
@@ -2092,20 +2092,12 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
 	matrix4x4_t tempmatrix;
 	r_waterstate_waterplane_t *waterplane = (r_waterstate_waterplane_t *)surfacewaterplane;
 	if (rsurface.texture->currentmaterialflags & MATERIALFLAG_ALPHATEST)
-		permutation |= SHADERPERMUTATION_ALPHAKILL;
-	// Alpha to Coverage
-	// fixme: move to gl_backend
-	if (vid_multisampling.integer && r_transparent_alphatocoverage.integer)
 	{
-		if (rsurface.texture->currentmaterialflags & MATERIALFLAG_ALPHATEST)
-		{
-			qglEnable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);CHECKGLERROR
-		}
-		else
-		{
-			qglDisable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);CHECKGLERROR
-		}
+		permutation |= SHADERPERMUTATION_ALPHAKILL;
+		GL_AlphaTest(true);
 	}
+	else
+		GL_AlphaTest(false);
 	if (rsurface.texture->r_water_waterscroll[0] && rsurface.texture->r_water_waterscroll[1])
 		permutation |= SHADERPERMUTATION_NORMALMAPSCROLLBLEND; // todo: make generic
 	if (rsurfacepass == RSURFPASS_BACKGROUND)
diff --git a/r_shadow.c b/r_shadow.c
index 5b2a8190..47507cf9 100644
--- a/r_shadow.c
+++ b/r_shadow.c
@@ -1952,13 +1952,14 @@ void R_Shadow_RenderMode_Begin(void)
 	CHECKGLERROR
 	R_Mesh_ResetTextureState();
 	GL_BlendFunc(GL_ONE, GL_ZERO);
+	GL_AlphaTest(false);
 	GL_DepthRange(0, 1);
 	GL_PolygonOffset(r_refdef.polygonfactor, r_refdef.polygonoffset);
 	GL_DepthTest(true);
 	GL_DepthMask(false);
 	GL_Color(0, 0, 0, 1);
 	GL_Scissor(r_refdef.view.viewport.x, r_refdef.view.viewport.y, r_refdef.view.viewport.width, r_refdef.view.viewport.height);
-
+	
 	r_shadow_rendermode = R_SHADOW_RENDERMODE_NONE;
 
 	if (gl_ext_separatestencil.integer && vid.support.ati_separate_stencil)
-- 
2.39.2