glsl2: Conditionally allow optional extensions to be enabled

The only optional extension currently supported by the compiler is
GL_EXT_texture_array.

3 files changed, 10 insertions, 0 deletions

diff --git a/src/glsl/glsl_parser_extras.cpp b/src/glsl/glsl_parser_extras.cpp
index 2e17c4c3372..fc3f9e90b6b 100644
--- a/src/glsl/glsl_parser_extras.cpp
+++ b/src/glsl/glsl_parser_extras.cpp
@@ -27,6 +27,7 @@
 
 extern "C" {
 #include <talloc.h>
+#include "main/mtypes.h"
 }
 
 #include "ast.h"
@@ -135,6 +136,11 @@ _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
    } else if (strcmp(name, "GL_ARB_texture_rectangle") == 0) {
       state->ARB_texture_rectangle_enable = (ext_mode != extension_disable);
       state->ARB_texture_rectangle_warn = (ext_mode == extension_warn);
+   } else if (strcmp(name, "GL_EXT_texture_array") == 0) {
+      state->EXT_texture_array_enable = (ext_mode != extension_disable);
+      state->EXT_texture_array_warn = (ext_mode == extension_warn);
+
+      unsupported = !state->extensions->EXT_texture_array;
    } else {
       unsupported = true;
    }
diff --git a/src/glsl/glsl_parser_extras.h b/src/glsl/glsl_parser_extras.h
index dc3d23ac545..16f72681816 100644
--- a/src/glsl/glsl_parser_extras.h
+++ b/src/glsl/glsl_parser_extras.h
@@ -90,6 +90,9 @@ struct _mesa_glsl_parse_state {
    unsigned EXT_texture_array_enable:1;
    unsigned EXT_texture_array_warn:1;
    /*@}*/
+
+   /** Extensions supported by the OpenGL implementation. */
+   const struct gl_extensions *extensions;
 };
 
 typedef struct YYLTYPE {
diff --git a/src/glsl/main.cpp b/src/glsl/main.cpp
index deaab7e0335..16bbc8cd3f1 100644
--- a/src/glsl/main.cpp
+++ b/src/glsl/main.cpp
@@ -129,6 +129,7 @@ compile_shader(struct gl_shader *shader)
    state->ARB_texture_rectangle_enable = true;
 
    memset(&ext, 0, sizeof(ext));
+   state->extensions = &ext;
    state->Const.MaxDrawBuffers = 2;
    state->Const.MaxTextureCoords = 4;