diff options
Diffstat (limited to 'src/mesa/main/texstate.c')
| -rw-r--r-- | src/mesa/main/texstate.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/src/mesa/main/texstate.c b/src/mesa/main/texstate.c index 7e5ce3085a0..fa893e7f2d7 100644 --- a/src/mesa/main/texstate.c +++ b/src/mesa/main/texstate.c @@ -1,4 +1,4 @@ -/* $Id: texstate.c,v 1.5 1999/11/11 01:22:28 brianp Exp $ */ +/* $Id: texstate.c,v 1.6 1999/11/12 02:07:56 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -31,6 +31,7 @@ #include "glheader.h" #include "context.h" #include "enums.h" +#include "extensions.h" #include "macros.h" #include "matrix.h" #include "texobj.h" @@ -84,10 +85,16 @@ _mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param ) if (pname==GL_TEXTURE_ENV_MODE) { GLenum mode = (GLenum) (GLint) *param; switch (mode) { - case GL_MODULATE: - case GL_BLEND: - case GL_DECAL: - case GL_REPLACE: + case GL_ADD: + if (!gl_extension_is_enabled(ctx, "GL_EXT_texture_env_add")) { + gl_error(ctx, GL_INVALID_ENUM, "glTexEnv(param)"); + return; + } + /* FALL-THROUGH */ + case GL_MODULATE: + case GL_BLEND: + case GL_DECAL: + case GL_REPLACE: /* A small optimization for drivers */ if (texUnit->EnvMode == mode) return; |