Added support for TimeStamp queries using QueryCounterEXT.

gpu/command_buffer/client/query_tracker.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/client/query_tracker.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.h>
 
@@ skipping 148 matching lines @@
           return;
         }
       }
     }
   }
   flush_count_ = gl->helper()->flush_generation();
   gl->helper()->EndQueryEXT(target(), submit_count());
   MarkAsPending(gl->helper()->InsertToken());
 }
 
+void QueryTracker::Query::QueryCounter(GLES2Implementation* gl) {
+  MarkAsActive();
+  flush_count_ = gl->helper()->flush_generation();
+  gl->helper()->QueryCounterEXT(target(), id(), shm_id(), shm_offset(),
+                                submit_count());
+  MarkAsPending(gl->helper()->InsertToken());
+}
+
 bool QueryTracker::Query::CheckResultsAvailable(
     CommandBufferHelper* helper) {
   if (Pending()) {
     if (base::subtle::Acquire_Load(&info_.sync->process_count) ==
             submit_count_ ||
         helper->IsContextLost()) {
       switch (target()) {
         case GL_COMMANDS_ISSUED_CHROMIUM:
           result_ = info_.sync->result;
           break;
@@ skipping 138 matching lines @@
     gl->SetGLError(GL_INVALID_OPERATION,
                    "glEndQueryEXT", "no active query");
     return false;
   }
 
   target_it->second->End(gl);
   current_queries_.erase(target_it);
   return true;
 }
 
+bool QueryTracker::QueryCounter(GLuint id, GLenum target,
+                                GLES2Implementation* gl) {
+  QueryTracker::Query* query = GetQuery(id);
+  if (!query) {
+    query = CreateQuery(id, target);
+    if (!query) {
+      gl->SetGLError(GL_OUT_OF_MEMORY,
+                     "glQueryCounterEXT",
+                     "transfer buffer allocation failed");
+      return false;
+    }
+  } else if (query->target() != target) {
+    gl->SetGLError(GL_INVALID_OPERATION,
+                   "glQueryCounterEXT",
+                   "target does not match");
+    return false;
+  }
+
+  query->QueryCounter(gl);
+  return true;
+}
+
 }  // namespace gles2
 }  // namespace gpu