commit 2aeb26a4f6e21a923415eb00499795b63a17ef76
author Jamie Madill <jmadill@transgaming.com> Mon Jul 08 14:02:55 2013 -0400
committer Shannon Woods <shannonwoods@chromium.org> Fri Jul 19 18:08:08 2013 -0400
tree 2618d5b5f5fc893af6f93034f2181af97bacdf00
parent 18464b515a9f6820cb1a60b176f43eb8107e5a76

Added support for EXT_frag_depth

This change also required that support be added for associating built-in
variables with an extension, similar to how functions could be associated with
extensions previously.

R=alokp@chromium.org

Review URL: https://codereview.appspot.com/9827044

git-svn-id: https://angleproject.googlecode.com/svn/trunk@2248 736b8ea6-26fd-11df-bfd4-992fa37f6226

TRAC #23333
Authored-by: bajones@chromium.org
Signed-off-by: Shannon Woods
Signed-off-by Nicolas Capens
Merged-by: Jamie Madill

src/compiler/Initialize.cpp

diff --git a/src/compiler/Initialize.cpp b/src/compiler/Initialize.cpp
index 302d157..8a73609 100644
--- a/src/compiler/Initialize.cpp
+++ b/src/compiler/Initialize.cpp
@@ -511,6 +511,10 @@
         if (spec != SH_CSS_SHADERS_SPEC) {
             symbolTable.insert(ESSL1_BUILTINS, *new TVariable(NewPoolTString("gl_FragColor"), TType(EbtFloat, EbpMedium, EvqFragColor,   4)));
             symbolTable.insert(ESSL1_BUILTINS, *new TVariable(NewPoolTString("gl_FragData[gl_MaxDrawBuffers]"), TType(EbtFloat, EbpMedium, EvqFragData,    4)));
+            if (resources.EXT_frag_depth) {
+                symbolTable.insert(ESSL1_BUILTINS, *new TVariable(NewPoolTString("gl_FragDepthEXT"), TType(EbtFloat, resources.FragmentPrecisionHigh ? EbpHigh : EbpMedium, EvqFragDepth, 1)));
+                symbolTable.relateToExtension(ESSL1_BUILTINS, "gl_FragDepthEXT", "GL_EXT_frag_depth");
+            }
         } else {
             symbolTable.insert(ESSL1_BUILTINS, *new TVariable(NewPoolTString("css_MixColor"), TType(EbtFloat, EbpMedium, EvqGlobal,      4)));
             symbolTable.insert(ESSL1_BUILTINS, *new TVariable(NewPoolTString("css_ColorMatrix"), TType(EbtFloat, EbpMedium, EvqGlobal,      4, 4)));
@@ -631,4 +635,6 @@
         extBehavior["GL_ARB_texture_rectangle"] = EBhUndefined;
     if (resources.EXT_draw_buffers)
         extBehavior["GL_EXT_draw_buffers"] = EBhUndefined;
+    if (resources.EXT_frag_depth)
+        extBehavior["GL_EXT_frag_depth"] = EBhUndefined;
 }