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/Initialize.cpp

diff --git a/src/compiler/translator/Initialize.cpp b/src/compiler/translator/Initialize.cpp
index 45ff056..c787883 100644
--- a/src/compiler/translator/Initialize.cpp
+++ b/src/compiler/translator/Initialize.cpp
@@ -706,6 +706,14 @@
     // Insert some special built-in variables that are not in
     // the built-in header files.
     //
+
+    if (resources.OVR_multiview && type != GL_COMPUTE_SHADER)
+    {
+        symbolTable.insert(COMMON_BUILTINS, "GL_OVR_multiview",
+                           new TVariable(NewPoolTString("gl_ViewID_OVR"),
+                                         TType(EbtUInt, EbpHigh, EvqViewIDOVR, 1)));
+    }
+
     switch (type)
     {
         case GL_FRAGMENT_SHADER:
@@ -858,6 +866,11 @@
         extBehavior["GL_NV_shader_framebuffer_fetch"] = EBhUndefined;
     if (resources.ARM_shader_framebuffer_fetch)
         extBehavior["GL_ARM_shader_framebuffer_fetch"] = EBhUndefined;
+    if (resources.OVR_multiview)
+    {
+        extBehavior["GL_OVR_multiview"]  = EBhUndefined;
+        extBehavior["GL_OVR_multiview2"] = EBhUndefined;
+    }
 }
 
 void ResetExtensionBehavior(TExtensionBehavior &extBehavior)