glsl: Add extension plumbing for OES/EXT_tessellation_shader.

This adds the #extension directive support, built-in #defines,
lexer keyword support, and updates has_tessellation_shader().

Signed-off-by: Kenneth Graunke <[email protected]>
Reviewed-by: Ian Romanick <[email protected]>

4 files changed, 19 insertions, 3 deletions

diff --git a/src/compiler/glsl/glsl_lexer.ll b/src/compiler/glsl/glsl_lexer.ll
index 11711eea231..7be2b89acbe 100644
--- a/src/compiler/glsl/glsl_lexer.ll
+++ b/src/compiler/glsl/glsl_lexer.ll
@@ -311,7 +311,7 @@ invariant	KEYWORD(120, 100, 120, 100, INVARIANT);
 flat		KEYWORD(130, 100, 130, 300, FLAT);
 smooth		KEYWORD(130, 300, 130, 300, SMOOTH);
 noperspective	KEYWORD(130, 300, 130, 0, NOPERSPECTIVE);
-patch		KEYWORD_WITH_ALT(0, 300, 400, 0, yyextra->ARB_tessellation_shader_enable, PATCH);
+patch		KEYWORD_WITH_ALT(0, 300, 400, 320, yyextra->has_tessellation_shader(), PATCH);
 
 sampler1D	DEPRECATED_ES_KEYWORD(SAMPLER1D);
 sampler2D	return SAMPLER2D;
diff --git a/src/compiler/glsl/glsl_parser.yy b/src/compiler/glsl/glsl_parser.yy
index 146589a5aa4..4ab9e145001 100644
--- a/src/compiler/glsl/glsl_parser.yy
+++ b/src/compiler/glsl/glsl_parser.yy
@@ -1274,7 +1274,8 @@ layout_qualifier_id:
             }
          }
 
-         if ($$.flags.i && !state->has_geometry_shader()) {
+         if ($$.flags.i && !state->has_geometry_shader() &&
+             !state->has_tessellation_shader()) {
             _mesa_glsl_error(& @1, state, "#version 150 layout "
                              "qualifier `%s' used", $1);
          }
diff --git a/src/compiler/glsl/glsl_parser_extras.cpp b/src/compiler/glsl/glsl_parser_extras.cpp
index e7022919750..14a5540063c 100644
--- a/src/compiler/glsl/glsl_parser_extras.cpp
+++ b/src/compiler/glsl/glsl_parser_extras.cpp
@@ -634,6 +634,8 @@ static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
    EXT(OES_shader_io_blocks),
    EXT(OES_shader_multisample_interpolation),
    EXT(OES_standard_derivatives),
+   EXT(OES_tessellation_point_size),
+   EXT(OES_tessellation_shader),
    EXT(OES_texture_3D),
    EXT(OES_texture_buffer),
    EXT(OES_texture_storage_multisample_2d_array),
@@ -653,6 +655,8 @@ static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
    EXT(EXT_shader_integer_mix),
    EXT(EXT_shader_io_blocks),
    EXT(EXT_shader_samples_identical),
+   EXT(EXT_tessellation_point_size),
+   EXT(EXT_tessellation_shader),
    EXT(EXT_texture_array),
    EXT(EXT_texture_buffer),
    EXT(MESA_shader_integer_functions),
diff --git a/src/compiler/glsl/glsl_parser_extras.h b/src/compiler/glsl/glsl_parser_extras.h
index f9c1ffca842..991cfc6ebc9 100644
--- a/src/compiler/glsl/glsl_parser_extras.h
+++ b/src/compiler/glsl/glsl_parser_extras.h
@@ -279,7 +279,10 @@ struct _mesa_glsl_parse_state {
 
    bool has_tessellation_shader() const
    {
-      return ARB_tessellation_shader_enable || is_version(400, 0);
+      return ARB_tessellation_shader_enable ||
+             OES_tessellation_shader_enable ||
+             EXT_tessellation_shader_enable ||
+             is_version(400, 320);
    }
 
    bool has_clip_distance() const
@@ -649,6 +652,10 @@ struct _mesa_glsl_parse_state {
    bool OES_shader_multisample_interpolation_warn;
    bool OES_standard_derivatives_enable;
    bool OES_standard_derivatives_warn;
+   bool OES_tessellation_point_size_enable;
+   bool OES_tessellation_point_size_warn;
+   bool OES_tessellation_shader_enable;
+   bool OES_tessellation_shader_warn;
    bool OES_texture_3D_enable;
    bool OES_texture_3D_warn;
    bool OES_texture_buffer_enable;
@@ -684,6 +691,10 @@ struct _mesa_glsl_parse_state {
    bool EXT_shader_io_blocks_warn;
    bool EXT_shader_samples_identical_enable;
    bool EXT_shader_samples_identical_warn;
+   bool EXT_tessellation_point_size_enable;
+   bool EXT_tessellation_point_size_warn;
+   bool EXT_tessellation_shader_enable;
+   bool EXT_tessellation_shader_warn;
    bool EXT_texture_array_enable;
    bool EXT_texture_array_warn;
    bool EXT_texture_buffer_enable;