mesa: don't advertise bogus GL_ARB_shading_language_120 extension

Instead of using the invalid GL_ARB_shading_language_120 extension to
determine the GLSL version, use a new ctx->Const.GLSLVersion field.
Updated the intel and r600 drivers, but untested.

See fd.o bug 29910

NOTE: This is a candidate for the 7.9 branch (but let's wait and see if
there's any regressions).

1 files changed, 25 insertions, 9 deletions

diff --git a/src/mesa/main/getstring.c b/src/mesa/main/getstring.c
index 5e4fcd599c..3910047fb5 100644
--- a/src/mesa/main/getstring.c
+++ b/src/mesa/main/getstring.c
@@ -30,26 +30,42 @@
 #include "enums.h"
 #include "extensions.h"
 
+
+/**
+ * Return the string for a glGetString(GL_SHADING_LANGUAGE_VERSION) query.
+ */
 static const GLubyte *
 shading_language_version(GLcontext *ctx)
 {
    switch (ctx->API) {
-#if FEATURE_ARB_shading_language_100
    case API_OPENGL:
-      if (ctx->Extensions.ARB_shading_language_120)
-	 return (const GLubyte *) "1.20";
-      else if (ctx->Extensions.ARB_shading_language_100)
-	 return (const GLubyte *) "1.10";
-      goto error;
-#endif
+      if (!ctx->Extensions.ARB_shader_objects) {
+         _mesa_error(ctx, GL_INVALID_ENUM, "glGetString");
+         return (const GLubyte *) 0;
+      }
+
+      switch (ctx->Const.GLSLVersion) {
+      case 110:
+         return (const GLubyte *) "1.10";
+      case 120:
+         return (const GLubyte *) "1.20";
+      case 130:
+         return (const GLubyte *) "1.30";
+      default:
+         _mesa_problem(ctx,
+                       "Invalid GLSL version in shading_language_version()");
+         return (const GLubyte *) 0;
+      }
+      break;
 
    case API_OPENGLES2:
       return (const GLubyte *) "OpenGL ES GLSL ES 1.0.16";
 
    case API_OPENGLES:
+      /* fall-through */
+
    default:
-   error:
-      _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
+      _mesa_problem(ctx, "Unexpected API value in shading_language_version()");
       return (const GLubyte *) 0;
    }
 }