Mesa (master): mesa: Add EXT_frag_depth bits and enable it on all drivers

[Anuj Phogat]

Module: Mesa
Branch: master
Commit: 5e2909e732aaccfa2e26745dd6f32e9dc266dd5d
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=5e2909e732aaccfa2e26745dd6f32e9dc266dd5d

Author: Anuj Phogat <anuj.phogat at gmail.com>
Date:   Fri Feb 10 13:43:57 2017 -0800

mesa: Add EXT_frag_depth bits and enable it on all drivers

Passes the newly added piglit test for this extension on i965.

V2: Fix comments by Ilia.

Signed-off-by: Anuj Phogat <anuj.phogat at gmail.com>
Reviewed-by: Ilia Mirkin <imirkin at alum.mit.edu>

---

 src/compiler/glsl/builtin_variables.cpp  | 3 +++
 src/compiler/glsl/glsl_parser_extras.cpp | 1 +
 src/compiler/glsl/glsl_parser_extras.h   | 2 ++
 src/mesa/main/extensions_table.h         | 1 +
 4 files changed, 7 insertions(+)

diff --git a/src/compiler/glsl/builtin_variables.cpp b/src/compiler/glsl/builtin_variables.cpp
index be593e9..db8418b 100644
--- a/src/compiler/glsl/builtin_variables.cpp
+++ b/src/compiler/glsl/builtin_variables.cpp
@@ -1193,6 +1193,9 @@ builtin_variable_generator::generate_fs_special_vars()
    if (state->is_version(110, 300))
       add_output(FRAG_RESULT_DEPTH, float_t, "gl_FragDepth");
 
+   if (state->EXT_frag_depth_enable)
+      add_output(FRAG_RESULT_DEPTH, float_t, "gl_FragDepthEXT");
+
    if (state->ARB_shader_stencil_export_enable) {
       ir_variable *const var =
          add_output(FRAG_RESULT_STENCIL, int_t, "gl_FragStencilRefARB");
diff --git a/src/compiler/glsl/glsl_parser_extras.cpp b/src/compiler/glsl/glsl_parser_extras.cpp
index c4da79a..f6a9c9a 100644
--- a/src/compiler/glsl/glsl_parser_extras.cpp
+++ b/src/compiler/glsl/glsl_parser_extras.cpp
@@ -684,6 +684,7 @@ static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
    EXT(AMD_vertex_shader_viewport_index),
    EXT(ANDROID_extension_pack_es31a),
    EXT(EXT_blend_func_extended),
+   EXT(EXT_frag_depth),
    EXT(EXT_draw_buffers),
    EXT(EXT_clip_cull_distance),
    EXT(EXT_geometry_point_size),
diff --git a/src/compiler/glsl/glsl_parser_extras.h b/src/compiler/glsl/glsl_parser_extras.h
index 66a954f..9f4a309 100644
--- a/src/compiler/glsl/glsl_parser_extras.h
+++ b/src/compiler/glsl/glsl_parser_extras.h
@@ -741,6 +741,8 @@ struct _mesa_glsl_parse_state {
    bool EXT_clip_cull_distance_warn;
    bool EXT_draw_buffers_enable;
    bool EXT_draw_buffers_warn;
+   bool EXT_frag_depth_enable;
+   bool EXT_frag_depth_warn;
    bool EXT_geometry_point_size_enable;
    bool EXT_geometry_point_size_warn;
    bool EXT_geometry_shader_enable;
diff --git a/src/mesa/main/extensions_table.h b/src/mesa/main/extensions_table.h
index 75f432b..7ea56c8 100644
--- a/src/mesa/main/extensions_table.h
+++ b/src/mesa/main/extensions_table.h
@@ -211,6 +211,7 @@ EXT(EXT_draw_elements_base_vertex           , ARB_draw_elements_base_vertex
 EXT(EXT_draw_instanced                      , ARB_draw_instanced                     , GLL, GLC,  x ,  x , 2006)
 EXT(EXT_draw_range_elements                 , dummy_true                             , GLL,  x ,  x ,  x , 1997)
 EXT(EXT_fog_coord                           , dummy_true                             , GLL,  x ,  x ,  x , 1999)
+EXT(EXT_frag_depth                          , dummy_true                             ,  x ,  x ,  x , ES2, 2010)
 EXT(EXT_framebuffer_blit                    , dummy_true                             , GLL, GLC,  x ,  x , 2005)
 EXT(EXT_framebuffer_multisample             , EXT_framebuffer_multisample            , GLL, GLC,  x ,  x , 2005)
 EXT(EXT_framebuffer_multisample_blit_scaled , EXT_framebuffer_multisample_blit_scaled, GLL, GLC,  x ,  x , 2011)