commit 544809610a131fe7040f2212789c62e212bbaf24
author Kimmo Kinnunen <kkinnunen@nvidia.com> Wed Jul 22 10:30:35 2015 +0300
committer Jamie Madill <jmadill@chromium.org> Thu Jul 23 15:40:53 2015 +0000
tree 25305ae829fdb0418e1ca3d2d4feccd2ebbd07d0
parent 15ca829680f81b26dfbcb59e9d53554cb1b29395

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.

BUG=angleproject:1102
TEST=angle_unittest

Change-Id: Ic313a0e1ed6369550d53885290f300fab1aaf304
Reviewed-on: https://chromium-review.googlesource.com/287570
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

src/compiler/translator/VariableInfo.cpp

diff --git a/src/compiler/translator/VariableInfo.cpp b/src/compiler/translator/VariableInfo.cpp
index c1c4c2d..dd627e8 100644
--- a/src/compiler/translator/VariableInfo.cpp
+++ b/src/compiler/translator/VariableInfo.cpp
@@ -150,6 +150,7 @@
       mLastFragDataAdded(false),
       mFragColorAdded(false),
       mFragDataAdded(false),
+      mFragDepthEXTAdded(false),
       mFragDepthAdded(false),
       mHashFunction(hashFunction),
       mSymbolTable(symbolTable)
@@ -402,8 +403,8 @@
                   mFragDataAdded = true;
               }
               return;
-          case EvqFragDepth:
-              if (!mFragDepthAdded)
+          case EvqFragDepthEXT:
+              if (!mFragDepthEXTAdded)
               {
                   Attribute info;
                   const char kName[] = "gl_FragDepthEXT";
@@ -417,9 +418,25 @@
                                               ->getType());
                   info.staticUse = true;
                   mOutputVariables->push_back(info);
+                  mFragDepthEXTAdded = true;
+              }
+              return;
+          case EvqFragDepth:
+              if (!mFragDepthAdded)
+              {
+                  Attribute 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;
+
           default:
             break;
         }