commit b088360f01d494a1120dfc1996c771cdff02c9d2
author Martin Radev <mradev@nvidia.com> Thu Aug 04 17:48:58 2016 +0300
committer Commit Bot <commit-bot@chromium.org> Tue Aug 09 20:20:05 2016 +0000
tree 892fa18fd037fa6a83a28d260a445ec16e889ddf
parent 802abe0150b38df3c65205af60180acd63a66e51

Add compute shader special variables

Support is added for the compute shader special variables given in
OpenGL GLSL ES 3.1 Revision 4, 7.1.3 Compute Shader Special Variables.
Unit tests are added for legal and illegal usage of the special
variables.

BUG=angleproject:1442

TEST=angle_unittests

Change-Id: Idb25811c15c4044c55c611c0e73ef26eb5b3e9d7
Reviewed-on: https://chromium-review.googlesource.com/366661
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

src/compiler/translator/ParseContext.cpp

diff --git a/src/compiler/translator/ParseContext.cpp b/src/compiler/translator/ParseContext.cpp
index 33ec8c0..33ec5bb 100644
--- a/src/compiler/translator/ParseContext.cpp
+++ b/src/compiler/translator/ParseContext.cpp
@@ -340,6 +340,24 @@
         case EvqPointCoord:
             message = "can't modify gl_PointCoord";
             break;
+        case EvqNumWorkGroups:
+            message = "can't modify gl_NumWorkGroups";
+            break;
+        case EvqWorkGroupSize:
+            message = "can't modify gl_WorkGroupSize";
+            break;
+        case EvqWorkGroupID:
+            message = "can't modify gl_WorkGroupID";
+            break;
+        case EvqLocalInvocationID:
+            message = "can't modify gl_LocalInvocationID";
+            break;
+        case EvqGlobalInvocationID:
+            message = "can't modify gl_GlobalInvocationID";
+            break;
+        case EvqLocalInvocationIndex:
+            message = "can't modify gl_LocalInvocationIndex";
+            break;
         case EvqComputeIn:
             message = "can't modify work group size variable";
             break;
@@ -1246,6 +1264,15 @@
             error(location, errorMessage, name->c_str());
             recover();
         }
+
+        // GLSL ES 3.1 Revision 4, 7.1.3 Compute Shader Special Variables
+        if (getShaderType() == GL_COMPUTE_SHADER && !mComputeShaderLocalSizeDeclared &&
+            qualifier == EvqWorkGroupSize)
+        {
+            error(location,
+                  "It is an error to use gl_WorkGroupSize before declaring the local group size",
+                  "gl_WorkGroupSize");
+        }
     }
 
     if (!variable)