mesa: implement ARB_compatibility

Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
Reviewed-by: Brian Paul <brianp@vmware.com>

src/compiler/glsl/builtin_functions.cpp

@@ -104,7 +104,7 @@ static bool
 compatibility_vs_only(const _mesa_glsl_parse_state *state)
 {
    return state->stage == MESA_SHADER_VERTEX &&
-          state->language_version <= 130 &&
+          (state->compat_shader || state->ARB_compatibility_enable) &&
           !state->es_shader;
 }
 

src/compiler/glsl/builtin_types.cpp

@@ -288,7 +288,7 @@ _mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *state)
    /* Add deprecated structure types.  While these were deprecated in 1.30,
     * they're still present.  We've removed them in 1.40+ (OpenGL 3.1+).
     */
-   if (state->compat_shader) {
+   if (state->compat_shader || state->ARB_compatibility_enable) {
       for (unsigned i = 0; i < ARRAY_SIZE(deprecated_types); i++) {
          add_type(symbols, deprecated_types[i]);
       }

src/compiler/glsl/builtin_variables.cpp

@@ -441,7 +441,7 @@ private:
 builtin_variable_generator::builtin_variable_generator(
    exec_list *instructions, struct _mesa_glsl_parse_state *state)
    : instructions(instructions), state(state), symtab(state->symbols),
-     compatibility(state->compat_shader || !state->is_version(140, 100)),
+     compatibility(state->compat_shader || state->ARB_compatibility_enable),
      bool_t(glsl_type::bool_type), int_t(glsl_type::int_type),
      uint_t(glsl_type::uint_type),
      uint64_t(glsl_type::uint64_t_type),

src/compiler/glsl/glsl_parser_extras.cpp

@@ -616,6 +616,7 @@ static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
    EXT(ARB_ES3_2_compatibility),
    EXT(ARB_arrays_of_arrays),
    EXT(ARB_bindless_texture),
+   EXT(ARB_compatibility),
    EXT(ARB_compute_shader),
    EXT(ARB_compute_variable_group_size),
    EXT(ARB_conservative_depth),

src/compiler/glsl/glsl_parser_extras.h

@@ -609,6 +609,8 @@ struct _mesa_glsl_parse_state {
    bool ARB_arrays_of_arrays_warn;
    bool ARB_bindless_texture_enable;
    bool ARB_bindless_texture_warn;
+   bool ARB_compatibility_enable;
+   bool ARB_compatibility_warn;
    bool ARB_compute_shader_enable;
    bool ARB_compute_shader_warn;
    bool ARB_compute_variable_group_size_enable;