[Mesa-dev] [PATCH v3] glsl: add support for GL_OES_geometry_shader

[Marta Lofstedt]

From: Marta Lofstedt <marta.lofstedt at intel.com>

This adds glsl support of GL_OES_geometry_shader for
OpenGL ES 3.1.

Signed-off-by: Marta Lofstedt <marta.lofstedt at linux.intel.com>
---
 src/glsl/builtin_variables.cpp  | 25 +++++++++++++------------
 src/glsl/glsl_parser.yy         |  4 ++--
 src/glsl/glsl_parser_extras.cpp |  1 +
 src/glsl/glsl_parser_extras.h   |  7 +++++++
 4 files changed, 23 insertions(+), 14 deletions(-)

diff --git a/src/glsl/builtin_variables.cpp b/src/glsl/builtin_variables.cpp
index e8eab80..6f87600 100644
--- a/src/glsl/builtin_variables.cpp
+++ b/src/glsl/builtin_variables.cpp
@@ -667,7 +667,7 @@ builtin_variable_generator::generate_constants()
       add_const("gl_MaxVaryingComponents", state->ctx->Const.MaxVarying * 4);
    }
 
-   if (state->is_version(150, 0)) {
+   if (state->has_geometry_shader()) {
       add_const("gl_MaxVertexOutputComponents",
                 state->Const.MaxVertexOutputComponents);
       add_const("gl_MaxGeometryInputComponents",
@@ -730,12 +730,11 @@ builtin_variable_generator::generate_constants()
       add_const("gl_MaxAtomicCounterBindings",
                 state->Const.MaxAtomicBufferBindings);
 
-      /* When Mesa adds support for GL_OES_geometry_shader and
-       * GL_OES_tessellation_shader, this will need to change.
-       */
-      if (!state->es_shader) {
+      if (state->has_geometry_shader()) {
          add_const("gl_MaxGeometryAtomicCounters",
                    state->Const.MaxGeometryAtomicCounters);
+      }
+      if (!state->es_shader) {
          add_const("gl_MaxTessControlAtomicCounters",
                    state->Const.MaxTessControlAtomicCounters);
          add_const("gl_MaxTessEvaluationAtomicCounters",
@@ -753,12 +752,11 @@ builtin_variable_generator::generate_constants()
       add_const("gl_MaxAtomicCounterBufferSize",
                 state->Const.MaxAtomicCounterBufferSize);
 
-      /* When Mesa adds support for GL_OES_geometry_shader and
-       * GL_OES_tessellation_shader, this will need to change.
-       */
-      if (!state->es_shader) {
+      if (state->has_geometry_shader()) {
          add_const("gl_MaxGeometryAtomicCounterBuffers",
                    state->Const.MaxGeometryAtomicCounterBuffers);
+      }
+      if(!state->es_shader) {
          add_const("gl_MaxTessControlAtomicCounterBuffers",
                    state->Const.MaxTessControlAtomicCounterBuffers);
          add_const("gl_MaxTessEvaluationAtomicCounterBuffers",
@@ -814,13 +812,16 @@ builtin_variable_generator::generate_constants()
       add_const("gl_MaxCombinedImageUniforms",
                 state->Const.MaxCombinedImageUniforms);
 
+      if (state->has_geometry_shader()) {
+         add_const("gl_MaxGeometryImageUniforms",
+                   state->Const.MaxGeometryImageUniforms);
+      }
+
       if (!state->es_shader) {
          add_const("gl_MaxCombinedImageUnitsAndFragmentOutputs",
                    state->Const.MaxCombinedShaderOutputResources);
          add_const("gl_MaxImageSamples",
                    state->Const.MaxImageSamples);
-         add_const("gl_MaxGeometryImageUniforms",
-                   state->Const.MaxGeometryImageUniforms);
       }
 
       if (state->is_version(450, 310)) {
@@ -1057,7 +1058,7 @@ builtin_variable_generator::generate_fs_special_vars()
    if (state->is_version(120, 100))
       add_input(VARYING_SLOT_PNTC, vec2_t, "gl_PointCoord");
 
-   if (state->is_version(150, 0)) {
+   if (state->has_geometry_shader()) {
       var = add_input(VARYING_SLOT_PRIMITIVE_ID, int_t, "gl_PrimitiveID");
       var->data.interpolation = INTERP_QUALIFIER_FLAT;
    }
diff --git a/src/glsl/glsl_parser.yy b/src/glsl/glsl_parser.yy
index 5a8f980..7a875fa 100644
--- a/src/glsl/glsl_parser.yy
+++ b/src/glsl/glsl_parser.yy
@@ -1262,7 +1262,7 @@ layout_qualifier_id:
             }
          }
 
-         if ($$.flags.i && !state->is_version(150, 0)) {
+         if ($$.flags.i && !state->has_geometry_shader()) {
             _mesa_glsl_error(& @1, state, "#version 150 layout "
                              "qualifier `%s' used", $1);
          }
@@ -1499,7 +1499,7 @@ layout_qualifier_id:
       if (match_layout_qualifier("max_vertices", $1, state) == 0) {
          $$.flags.q.max_vertices = 1;
          $$.max_vertices = new(ctx) ast_layout_expression(@1, $3);
-         if (!state->is_version(150, 0)) {
+         if (!state->has_geometry_shader()) {
             _mesa_glsl_error(& @3, state,
                              "#version 150 max_vertices qualifier "
                              "specified", $3);
diff --git a/src/glsl/glsl_parser_extras.cpp b/src/glsl/glsl_parser_extras.cpp
index 29cf0c6..cd0714e 100644
--- a/src/glsl/glsl_parser_extras.cpp
+++ b/src/glsl/glsl_parser_extras.cpp
@@ -635,6 +635,7 @@ static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
    /* OES extensions go here, sorted alphabetically.
     */
    EXT(OES_EGL_image_external,         false, true,      OES_EGL_image_external),
+   EXT(OES_geometry_shader,            false, true,      OES_geometry_shader),
    EXT(OES_standard_derivatives,       false, true,      OES_standard_derivatives),
    EXT(OES_texture_3D,                 false, true,      dummy_true),
    EXT(OES_texture_storage_multisample_2d_array, false, true, ARB_texture_multisample),
diff --git a/src/glsl/glsl_parser_extras.h b/src/glsl/glsl_parser_extras.h
index 17ff0b5..b47c540 100644
--- a/src/glsl/glsl_parser_extras.h
+++ b/src/glsl/glsl_parser_extras.h
@@ -260,6 +260,11 @@ struct _mesa_glsl_parse_state {
       return ARB_compute_shader_enable || is_version(430, 310);
    }
 
+   bool has_geometry_shader() const
+   {
+      return OES_geometry_shader_enable || is_version(150, 320);
+   }
+
    void process_version_directive(YYLTYPE *locp, int version,
                                   const char *ident);
 
@@ -579,6 +584,8 @@ struct _mesa_glsl_parse_state {
     */
    bool OES_EGL_image_external_enable;
    bool OES_EGL_image_external_warn;
+   bool OES_geometry_shader_enable;
+   bool OES_geometry_shader_warn;
    bool OES_standard_derivatives_enable;
    bool OES_standard_derivatives_warn;
    bool OES_texture_3D_enable;
-- 
2.5.0