From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Wed, 30 Apr 2008 22:05:01 +0000 (-0600)
Subject: Add support for GL_REPLACE_EXT texture env mode.
X-Git-Tag: 062012170305~18722
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5f0fa82f68e3f4f7086ed6cf5616ef94820e19ee;p=profile%2Fivi%2Fmesa.git

Add support for GL_REPLACE_EXT texture env mode.

GL_REPLACE_EXT comes from the ancient GL_EXT_texture extension.  Found an old demo that
actually uses it.
The values of the GL_REPLACE and GL_REPLACE_EXT tokens is different, unfortunately.
---

diff --git a/src/mesa/main/texstate.c b/src/mesa/main/texstate.c
index 288b334..626c264 100644
--- a/src/mesa/main/texstate.c
+++ b/src/mesa/main/texstate.c
@@ -213,6 +213,9 @@ calculate_derived_texenv( struct gl_tex_env_combine_state *state,
       return;
    }
 
+   if (mode == GL_REPLACE_EXT)
+      mode = GL_REPLACE;
+
    switch (mode) {
    case GL_REPLACE:
    case GL_MODULATE:
@@ -315,7 +318,9 @@ _mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param )
       switch (pname) {
       case GL_TEXTURE_ENV_MODE:
          {
-            const GLenum mode = (GLenum) (GLint) *param;
+            GLenum mode = (GLenum) (GLint) *param;
+            if (mode == GL_REPLACE_EXT)
+               mode = GL_REPLACE;
 	    if (texUnit->EnvMode == mode)
 	       return;
             if (mode == GL_MODULATE ||