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/OutputHLSL.cpp

diff --git a/src/compiler/OutputHLSL.cpp b/src/compiler/OutputHLSL.cpp
index ace2a8e..88220da 100644
--- a/src/compiler/OutputHLSL.cpp
+++ b/src/compiler/OutputHLSL.cpp
@@ -97,6 +97,7 @@
     mUsesPointCoord = false;
     mUsesFrontFacing = false;
     mUsesPointSize = false;
+    mUsesFragDepth = false;
     mUsesXor = false;
     mUsesMod1 = false;
     mUsesMod2v = false;
@@ -702,6 +703,11 @@
             out << "};\n";
         }
 
+        if (mUsesFragDepth)
+        {
+            out << "static float gl_Depth = 0.0;\n";
+        }
+
         if (mUsesFragCoord)
         {
             out << "static float4 gl_FragCoord = float4(0, 0, 0, 0);\n";
@@ -1101,6 +1107,11 @@
         out << "#define GL_USES_POINT_SIZE\n";
     }
 
+    if (mUsesFragDepth)
+    {
+        out << "#define GL_USES_FRAG_DEPTH\n";
+    }
+
     if (mUsesDepthRange)
     {
         out << "#define GL_USES_DEPTH_RANGE\n";
@@ -1515,6 +1526,11 @@
             mUsesPointSize = true;
             out << name;
         }
+        else if (name == "gl_FragDepthEXT")
+        {
+            mUsesFragDepth = true;
+            out << "gl_Depth";
+        }
         else
         {
             out << decorate(name);