[Mesa-dev] [PATCH 1/3] glsl: add gl_HelperInvocation system value

[Ilia Mirkin]

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---
 src/glsl/builtin_variables.cpp             | 3 +++
 src/glsl/shader_enums.h                    | 1 +
 src/mesa/state_tracker/st_glsl_to_tgsi.cpp | 1 +
 3 files changed, 5 insertions(+)

diff --git a/src/glsl/builtin_variables.cpp b/src/glsl/builtin_variables.cpp
index b5e2908..7ea5db8 100644
--- a/src/glsl/builtin_variables.cpp
+++ b/src/glsl/builtin_variables.cpp
@@ -1050,6 +1050,9 @@ builtin_variable_generator::generate_fs_special_vars()
       add_input(VARYING_SLOT_LAYER, int_t, "gl_Layer");
       add_input(VARYING_SLOT_VIEWPORT, int_t, "gl_ViewportIndex");
    }
+
+   if (state->is_version(450, 310))
+      add_system_value(SYSTEM_VALUE_FRAG_HELPER, bool_t, "gl_HelperInvocation");
 }
 
 
diff --git a/src/glsl/shader_enums.h b/src/glsl/shader_enums.h
index 7c598b6..6bc93a5 100644
--- a/src/glsl/shader_enums.h
+++ b/src/glsl/shader_enums.h
@@ -352,6 +352,7 @@ typedef enum
    SYSTEM_VALUE_SAMPLE_ID,
    SYSTEM_VALUE_SAMPLE_POS,
    SYSTEM_VALUE_SAMPLE_MASK_IN,
+   SYSTEM_VALUE_FRAG_HELPER,
    /*@}*/
 
    /**
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index c3a8c11..fc728d1 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -4614,6 +4614,7 @@ const unsigned _mesa_sysval_to_semantic[SYSTEM_VALUE_MAX] = {
    TGSI_SEMANTIC_SAMPLEID,
    TGSI_SEMANTIC_SAMPLEPOS,
    TGSI_SEMANTIC_SAMPLEMASK,
+   0, /* gl_HelperInvocation */
 
    /* Tessellation shaders
     */
-- 
2.4.6