From 411a88accc8a2728abbdfbef4315addbc08cf5a3 Mon Sep 17 00:00:00 2001
From: Ilia Mirkin <imirkin@alum.mit.edu>
Date: Tue, 16 Feb 2016 14:29:38 -0500
Subject: [PATCH] mesa: add GL_OES_sample_shading support

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
---
 src/mapi/glapi/gen/es_EXT.xml           | 6 ++++++
 src/mesa/main/enable.c                  | 4 ++--
 src/mesa/main/extensions_table.h        | 1 +
 src/mesa/main/multisample.c             | 3 ++-
 src/mesa/main/tests/dispatch_sanity.cpp | 3 +++
 5 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/mapi/glapi/gen/es_EXT.xml b/src/mapi/glapi/gen/es_EXT.xml
index 8f8f997b20d..8e51c058321 100644
--- a/src/mapi/glapi/gen/es_EXT.xml
+++ b/src/mapi/glapi/gen/es_EXT.xml
@@ -798,6 +798,12 @@
     </function>
 </category>
 
+<category name="GL_OES_sample_shading" number="169">
+    <function name="MinSampleShadingOES" alias="MinSampleShading" es2="3.0">
+        <param name="value" type="GLfloat"/>
+    </function>
+</category>
+
 <!-- 174. GL_OES_texture_storage_multisample_2d_array -->
 <category name="GL_OES_texture_storage_multisample_2d_array" number="174">
     <enum name="TEXTURE_2D_MULTISAMPLE_ARRAY_OES"              value="0x9102"/>
diff --git a/src/mesa/main/enable.c b/src/mesa/main/enable.c
index b90a60ba03f..d2830770ec2 100644
--- a/src/mesa/main/enable.c
+++ b/src/mesa/main/enable.c
@@ -807,7 +807,7 @@ _mesa_set_enable(struct gl_context *ctx, GLenum cap, GLboolean state)
 
       /* GL_ARB_sample_shading */
       case GL_SAMPLE_SHADING:
-         if (!_mesa_is_desktop_gl(ctx))
+         if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
             goto invalid_enum_error;
          CHECK_EXTENSION(ARB_sample_shading, cap);
          if (ctx->Multisample.SampleShading == state)
@@ -1606,7 +1606,7 @@ _mesa_IsEnabled( GLenum cap )
 
       /* ARB_sample_shading */
       case GL_SAMPLE_SHADING:
-         if (!_mesa_is_desktop_gl(ctx))
+         if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
             goto invalid_enum_error;
          CHECK_EXTENSION(ARB_sample_shading);
          return ctx->Multisample.SampleShading;
diff --git a/src/mesa/main/extensions_table.h b/src/mesa/main/extensions_table.h
index 700ef24ab22..c1bcfc53d10 100644
--- a/src/mesa/main/extensions_table.h
+++ b/src/mesa/main/extensions_table.h
@@ -330,6 +330,7 @@ EXT(OES_point_sprite                        , ARB_point_sprite
 EXT(OES_query_matrix                        , dummy_true                             ,  x ,  x , ES1,  x , 2003)
 EXT(OES_read_format                         , dummy_true                             , GLL, GLC, ES1,  x , 2003)
 EXT(OES_rgb8_rgba8                          , dummy_true                             ,  x ,  x , ES1, ES2, 2005)
+EXT(OES_sample_shading                      , OES_sample_variables                   ,  x ,  x ,  x ,  30, 2014)
 EXT(OES_sample_variables                    , OES_sample_variables                   ,  x ,  x ,  x ,  30, 2014)
 EXT(OES_shader_image_atomic                 , ARB_shader_image_load_store            ,  x ,  x ,  x ,  31, 2015)
 EXT(OES_single_precision                    , dummy_true                             ,  x ,  x , ES1,  x , 2003)
diff --git a/src/mesa/main/multisample.c b/src/mesa/main/multisample.c
index 77773a20883..5453e38632e 100644
--- a/src/mesa/main/multisample.c
+++ b/src/mesa/main/multisample.c
@@ -127,7 +127,8 @@ _mesa_MinSampleShading(GLclampf value)
 {
    GET_CURRENT_CONTEXT(ctx);
 
-   if (!ctx->Extensions.ARB_sample_shading || !_mesa_is_desktop_gl(ctx)) {
+   if (!_mesa_has_ARB_sample_shading(ctx) &&
+       !_mesa_has_OES_sample_shading(ctx)) {
       _mesa_error(ctx, GL_INVALID_OPERATION, "glMinSampleShading");
       return;
    }
diff --git a/src/mesa/main/tests/dispatch_sanity.cpp b/src/mesa/main/tests/dispatch_sanity.cpp
index 309e574ac32..06e7ec1a195 100644
--- a/src/mesa/main/tests/dispatch_sanity.cpp
+++ b/src/mesa/main/tests/dispatch_sanity.cpp
@@ -2454,6 +2454,9 @@ const struct function gles3_functions_possible[] = {
    { "glTexBufferOES", 31, -1 },
    { "glTexBufferRangeOES", 31, -1 },
 
+   /* GL_OES_sample_shading */
+   { "glMinSampleShadingOES", 30, -1 },
+
    { NULL, 0, -1 }
 };
 
-- 
2.30.2