commit 5f0246ca6d27cda665db7417653220e204b38803
author Kimmo Kinnunen <kkinnunen@nvidia.com> Wed Jul 22 10:30:35 2015 +0300
committer Geoff Lang <geofflang@chromium.org> Tue Sep 29 18:57:23 2015 +0000
tree e6083a7bd357c9495a848d18c9ca74cacdbe8aea
parent ddf4d392185e0409b8836fd2d54ad921154213db

Implement gl_FragDepth for GLES SL 3.0

Makes it an error to access gl_FragDepthEXT  in #version 300 es shader.

TODO:
Lacks the feature to make "#extension GL_EXT_frag_depth : require" an
error for #version 300 es.

Reland of: https://chromium-review.googlesource.com/#/c/287570

BUG=angleproject:1102
TEST=angle_unittest

Change-Id: I064d918d65f37539cb1e14f12173ca5591a4ea3f
Reviewed-on: https://chromium-review.googlesource.com/301711
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

src/compiler/translator/VariableInfo.cpp

diff --git a/src/compiler/translator/VariableInfo.cpp b/src/compiler/translator/VariableInfo.cpp
index 07a9dcd..7413dc3 100644
--- a/src/compiler/translator/VariableInfo.cpp
+++ b/src/compiler/translator/VariableInfo.cpp
@@ -151,6 +151,7 @@
       mLastFragDataAdded(false),
       mFragColorAdded(false),
       mFragDataAdded(false),
+      mFragDepthEXTAdded(false),
       mFragDepthAdded(false),
       mSecondaryFragColorEXTAdded(false),
       mSecondaryFragDataEXTAdded(false),
@@ -405,8 +406,8 @@
                   mFragDataAdded = true;
               }
               return;
-          case EvqFragDepth:
-              if (!mFragDepthAdded)
+          case EvqFragDepthEXT:
+              if (!mFragDepthEXTAdded)
               {
                   OutputVariable info;
                   const char kName[] = "gl_FragDepthEXT";
@@ -420,6 +421,21 @@
                                               ->getType());
                   info.staticUse = true;
                   mOutputVariables->push_back(info);
+                  mFragDepthEXTAdded = true;
+              }
+              return;
+          case EvqFragDepth:
+              if (!mFragDepthAdded)
+              {
+                  OutputVariable info;
+                  const char kName[] = "gl_FragDepth";
+                  info.name          = kName;
+                  info.mappedName    = kName;
+                  info.type          = GL_FLOAT;
+                  info.arraySize     = 0;
+                  info.precision     = GL_HIGH_FLOAT;
+                  info.staticUse = true;
+                  mOutputVariables->push_back(info);
                   mFragDepthAdded = true;
               }
               return;