commit 09b04a2ffc64133ed0b19070092afd2d07d2ae2b
author Olli Etuaho <oetuaho@nvidia.com> Thu Dec 15 13:30:26 2016 +0000
committer Commit Bot <commit-bot@chromium.org> Thu Dec 22 12:10:08 2016 +0000
tree 8f959815cb6a96569ba089206cb2123b3afd73c0
parent b58e9bace69fe3752ff6439f01ce6185e7f04e21

Add shader translator support for OVR_multiview

The OVR_multiview and OVR_multiview2 extensions add gl_ViewID_OVR to
shaders. gl_ViewID_OVR can be translated either as is in GLSL output
or as a uniform by setting the SH_TRANSLATE_VIEWID_OVR_AS_UNIFORM
compiler flag.

If WebGL output is selected, the shaders will be validated according
to proposed rules in the WEBGL_multiview spec.

BUG=angleproject:1669
TEST=angle_unittests

Change-Id: I19ea3a6c8b4edb78be03f1a50a96bfef018870d0
Reviewed-on: https://chromium-review.googlesource.com/422848
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

src/compiler/translator/OutputGLSLBase.cpp

diff --git a/src/compiler/translator/OutputGLSLBase.cpp b/src/compiler/translator/OutputGLSLBase.cpp
index 379d6d6..839ceb6 100644
--- a/src/compiler/translator/OutputGLSLBase.cpp
+++ b/src/compiler/translator/OutputGLSLBase.cpp
@@ -1279,7 +1279,16 @@
 TString TOutputGLSLBase::hashVariableName(const TName &name)
 {
     if (mSymbolTable.findBuiltIn(name.getString(), mShaderVersion) != NULL)
+    {
+        if (mCompileOptions & SH_TRANSLATE_VIEWID_OVR_TO_UNIFORM &&
+            name.getString() == "gl_ViewID_OVR")
+        {
+            TName uniformName(TString("ViewId_OVR"));
+            uniformName.setInternal(true);
+            return hashName(uniformName);
+        }
         return name.getString();
+    }
     return hashName(name);
 }