From a1c2689d1f207e82dc1b39460aec0570cbddf38c Mon Sep 17 00:00:00 2001
From: Spoike <acceptthis@users.sourceforge.net>
Date: Wed, 5 Nov 2014 05:54:29 +0000
Subject: [PATCH] support for gl4 tesselation shaders. glsl code is available
 separately.

git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@4787 fc73d0e0-1445-4013-8a0c-d673dee63da5
---
 engine/d3d/d3d_backend.c | 2 +-
 engine/gl/gl_backend.c   | 4 +---
 engine/gl/glsupp.h       | 4 +++-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/engine/d3d/d3d_backend.c b/engine/d3d/d3d_backend.c
index 460a01fd1..1050ea87a 100644
--- a/engine/d3d/d3d_backend.c
+++ b/engine/d3d/d3d_backend.c
@@ -1832,7 +1832,7 @@ static void BE_RenderMeshProgram(shader_t *s, unsigned int vertcount, unsigned i
 
 	if (shaderstate.batchvbo && shaderstate.batchvbo->numbones)
 	{
-		if (p->permu[perm|PERMUTATION_SKELETAL].handle.glsl)
+		if (p->permu[perm|PERMUTATION_SKELETAL].handle.hlsl.vert)
 			perm |= PERMUTATION_SKELETAL;
 		else
 			return;
diff --git a/engine/gl/gl_backend.c b/engine/gl/gl_backend.c
index c7b6d2ffe..7e03dd900 100644
--- a/engine/gl/gl_backend.c
+++ b/engine/gl/gl_backend.c
@@ -2701,7 +2701,6 @@ static void BE_SendPassBlendDepthMask(unsigned int sbits)
 #endif
 }
 
-#define GL_PATCHES_ARB 0xe
 static void BE_SubmitMeshChain(qboolean usetesselation)
 {
 	int startv, starti, endv, endi;
@@ -2715,8 +2714,7 @@ static void BE_SubmitMeshChain(qboolean usetesselation)
 		if (shaderstate.curpatchverts != m)
 		{
 			shaderstate.curpatchverts = m;
-#define GL_PATCH_VERTICES                                 0x8E72
-			qglPatchParameteriARB(GL_PATCH_VERTICES, m);
+			qglPatchParameteriARB(GL_PATCH_VERTICES_ARB, m);
 		}
 		batchtype = GL_PATCHES_ARB;
 	}
diff --git a/engine/gl/glsupp.h b/engine/gl/glsupp.h
index b0f648897..2fefe29d6 100644
--- a/engine/gl/glsupp.h
+++ b/engine/gl/glsupp.h
@@ -579,7 +579,9 @@ typedef void		(APIENTRYP PFNGLGETSHADERSOURCEARBPROC)		(GLhandleARB obj, GLsizei
 #define GL_OBJECT_ACTIVE_ATTRIBUTE_MAX_LENGTH_ARB	0x8B8A
 #endif
 
-#ifndef GL_ARB_vertex_shader
+#ifndef GL_ARB_tessellation_shader
+#define GL_PATCHES_ARB								0xE
+#define GL_PATCH_VERTICES_ARB						0x8E72
 #define GL_TESS_EVALUATION_SHADER_ARB				0x8E87
 #define GL_TESS_CONTROL_SHADER_ARB					0x8E88
 #endif