Cache more GL state both service and client side.

BUG=160370


Review URL: https://chromiumcodereview.appspot.com/11363191

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@167613 0039d316-1c4b-4281-b951-d872f2087c98

18 files changed, 1504 insertions, 1009 deletions

diff --git a/gpu/command_buffer/build_gles2_cmd_buffer.py b/gpu/command_buffer/build_gles2_cmd_buffer.py
index 1441fa3..59f1ba2 100755
--- a/gpu/command_buffer/build_gles2_cmd_buffer.py
+++ b/gpu/command_buffer/build_gles2_cmd_buffer.py
@@ -67,7 +67,7 @@ _CAPABILITY_FLAGS = [
   {'name': 'polygon_offset_fill'},
   {'name': 'sample_alpha_to_coverage'},
   {'name': 'sample_coverage'},
-  {'name': 'scissor_test'},
+  {'name': 'scissor_test', 'state_flag': 'clear_state_dirty_'},
   {'name': 'stencil_test', 'state_flag': 'clear_state_dirty_'},
 ]
 
@@ -1211,6 +1211,9 @@ _FUNCTION_INFO = {
     'state': 'ClearDepthf',
     'decoder_func': 'glClearDepth',
     'gl_test_func': 'glClearDepth',
+    'valid_args': {
+      '0': '0.5f'
+    },
   },
   'ColorMask': {
     'type': 'StateSet',
@@ -1275,10 +1278,16 @@ _FUNCTION_INFO = {
   'BlendEquation': {
     'type': 'StateSetRGBAlpha',
     'state': 'BlendEquation',
+    'valid_args': {
+      '0': 'GL_FUNC_SUBTRACT'
+    },
   },
   'BlendEquationSeparate': {
     'type': 'StateSet',
     'state': 'BlendEquation',
+    'valid_args': {
+      '0': 'GL_FUNC_SUBTRACT'
+    },
   },
   'BlendFunc': {
     'type': 'StateSetRGBAlpha',
@@ -1290,26 +1299,38 @@ _FUNCTION_INFO = {
   },
   'SampleCoverage': {'decoder_func': 'DoSampleCoverage'},
   'StencilFunc': {
-    'type': 'StencilFrontBack',
+    'type': 'StateSetFrontBack',
     'state': 'StencilFunc',
   },
   'StencilFuncSeparate': {
-    'type': 'StencilFrontBack',
+    'type': 'StateSetFrontBackSeparate',
     'state': 'StencilFunc',
   },
   'StencilOp': {
     'type': 'StateSetFrontBack',
     'state': 'StencilOp',
+    'valid_args': {
+      '1': 'GL_INCR'
+    },
   },
   'StencilOpSeparate': {
     'type': 'StateSetFrontBackSeparate',
     'state': 'StencilOp',
+    'valid_args': {
+      '1': 'GL_INCR'
+    },
   },
   'Hint': {'decoder_func': 'DoHint'},
   'CullFace': {'type': 'StateSet', 'state': 'CullFace'},
   'FrontFace': {'type': 'StateSet', 'state': 'FrontFace'},
   'DepthFunc': {'type': 'StateSet', 'state': 'DepthFunc'},
-  'LineWidth': {'type': 'StateSet', 'state': 'LineWidth'},
+  'LineWidth': {
+    'type': 'StateSet',
+    'state': 'LineWidth',
+    'valid_args': {
+      '0': '0.5f'
+    },
+  },
   'PolygonOffset': {
     'type': 'StateSet',
     'state': 'PolygonOffset',
@@ -1362,6 +1383,7 @@ _FUNCTION_INFO = {
   'Disable': {
     'decoder_func': 'DoDisable',
     'impl_func': False,
+    'client_test': False,
   },
   'DisableVertexAttribArray': {
     'decoder_func': 'DoDisableVertexAttribArray',
@@ -1380,6 +1402,7 @@ _FUNCTION_INFO = {
   'Enable': {
     'decoder_func': 'DoEnable',
     'impl_func': False,
+    'client_test': False,
   },
   'EnableVertexAttribArray': {
     'decoder_func': 'DoEnableVertexAttribArray',
@@ -1936,7 +1959,11 @@ _FUNCTION_INFO = {
     'client_test': False,
     'pepper_interface': 'ChromiumMapSub',
   },
-  'UseProgram': {'decoder_func': 'DoUseProgram', 'unit_test': False},
+  'UseProgram': {
+    'decoder_func': 'DoUseProgram',
+    'impl_func': False,
+    'unit_test': False,
+  },
   'ValidateProgram': {'decoder_func': 'DoValidateProgram'},
   'VertexAttrib1f': {'decoder_func': 'DoVertexAttrib1f'},
   'VertexAttrib1fv': {
@@ -2850,13 +2877,18 @@ class StateSetHandler(TypeHandler):
     state = _STATES[state_name]
     states = state['states']
     args = func.GetOriginalArgs()
+    code = []
+    for ndx,item in enumerate(states):
+      code.append("state_.%s != %s" % (item['name'], args[ndx].name))
+    file.Write("  if (%s) {\n" % " ||\n      ".join(code))
     for ndx,item in enumerate(states):
-      file.Write("  state_.%s = %s;\n" % (item['name'], args[ndx].name))
+      file.Write("    state_.%s = %s;\n" % (item['name'], args[ndx].name))
     if 'state_flag' in state:
-      file.Write("  %s = true;\n" % state['state_flag'])
+      file.Write("    %s = true;\n" % state['state_flag'])
     if not func.GetInfo("no_gl"):
-      file.Write("  %s(%s);\n" %
+      file.Write("    %s(%s);\n" %
                  (func.GetGLFunctionName(), func.MakeOriginalArgString("")))
+    file.Write("  }\n")
 
 
 class StateSetRGBAlphaHandler(TypeHandler):
@@ -2872,14 +2904,19 @@ class StateSetRGBAlphaHandler(TypeHandler):
     states = state['states']
     args = func.GetOriginalArgs()
     num_args = len(args)
-    for ndx, item in enumerate(states):
-      file.Write("  state_.%s = %s;\n" %
+    code = []
+    for ndx,item in enumerate(states):
+      code.append("state_.%s != %s" % (item['name'], args[ndx % num_args].name))
+    file.Write("  if (%s) {\n" % " ||\n      ".join(code))
+    for ndx,item in enumerate(states):
+      file.Write("    state_.%s = %s;\n" %
                  (item['name'], args[ndx % num_args].name))
     if 'state_flag' in state:
-      file.Write("  %s = true;\n" % state['state_flag'])
+      file.Write("    %s = true;\n" % state['state_flag'])
     if not func.GetInfo("no_gl"):
-      file.Write("  %s(%s);\n" %
+      file.Write("    %s(%s);\n" %
                  (func.GetGLFunctionName(), func.MakeOriginalArgString("")))
+    file.Write("  }\n")
 
 
 class StateSetFrontBackSeparateHandler(TypeHandler):
@@ -2896,17 +2933,29 @@ class StateSetFrontBackSeparateHandler(TypeHandler):
     args = func.GetOriginalArgs()
     face = args[0].name
     num_args = len(args)
+    file.Write("  bool changed = false;\n")
     for group_ndx, group in enumerate(Grouper(num_args - 1, states)):
       file.Write("  if (%s == %s || %s == GL_FRONT_AND_BACK) {\n" %
                  (face, ('GL_FRONT', 'GL_BACK')[group_ndx], face))
+      code = []
       for ndx, item in enumerate(group):
-        file.Write("    state_.%s = %s;\n" % (item['name'], args[ndx + 1].name))
+        code.append("state_.%s != %s" % (item['name'], args[ndx + 1].name))
+      file.Write("    changed |= %s;\n" % " ||\n        ".join(code))
       file.Write("  }\n")
+    file.Write("  if (changed) {\n")
+    for group_ndx, group in enumerate(Grouper(num_args - 1, states)):
+      file.Write("    if (%s == %s || %s == GL_FRONT_AND_BACK) {\n" %
+                 (face, ('GL_FRONT', 'GL_BACK')[group_ndx], face))
+      for ndx, item in enumerate(group):
+        file.Write("      state_.%s = %s;\n" %
+                   (item['name'], args[ndx + 1].name))
+      file.Write("    }\n")
     if 'state_flag' in state:
-      file.Write("  %s = true;\n" % state['state_flag'])
+      file.Write("    %s = true;\n" % state['state_flag'])
     if not func.GetInfo("no_gl"):
-      file.Write("  %s(%s);\n" %
+      file.Write("    %s(%s);\n" %
                  (func.GetGLFunctionName(), func.MakeOriginalArgString("")))
+    file.Write("  }\n")
 
 
 class StateSetFrontBackHandler(TypeHandler):
@@ -2921,16 +2970,22 @@ class StateSetFrontBackHandler(TypeHandler):
     state = _STATES[state_name]
     states = state['states']
     args = func.GetOriginalArgs()
-    face = args[0].name
     num_args = len(args)
+    code = []
     for group_ndx, group in enumerate(Grouper(num_args, states)):
       for ndx, item in enumerate(group):
-        file.Write("  state_.%s = %s;\n" % (item['name'], args[ndx].name))
+        code.append("state_.%s != %s" % (item['name'], args[ndx].name))
+    file.Write("  if (%s) {\n" % " ||\n      ".join(code))
+    for group_ndx, group in enumerate(Grouper(num_args, states)):
+      for ndx, item in enumerate(group):
+        file.Write("    state_.%s = %s;\n" % (item['name'], args[ndx].name))
     if 'state_flag' in state:
-      file.Write("  %s = true;\n" % state['state_flag'])
+      file.Write("    %s = true;\n" % state['state_flag'])
     if not func.GetInfo("no_gl"):
-      file.Write("  %s(%s);\n" %
+      file.Write("    %s(%s);\n" %
                  (func.GetGLFunctionName(), func.MakeOriginalArgString("")))
+    file.Write("  }\n")
+
 
 class CustomHandler(TypeHandler):
   """Handler for commands that are auto-generated but require minor tweaks."""
@@ -3376,8 +3431,9 @@ TEST_F(%(test_name)s, %(name)sInvalidArgs%(arg_index)d_%(value_index)d) {
     SetGLError(GL_INVALID_OPERATION, "%(name)s\", \"%(id)s reserved id");
     return;
   }
-  Bind%(type)sHelper(%(arg_string)s);
-  helper_->%(name)s(%(arg_string)s);
+  if (Bind%(type)sHelper(%(arg_string)s)) {
+    helper_->%(name)s(%(arg_string)s);
+  }
 }
 
 """
@@ -3397,6 +3453,36 @@ TEST_F(%(test_name)s, %(name)sInvalidArgs%(arg_index)d_%(value_index)d) {
           'lc_type': name_arg.resource_type.lower(),
         })
 
+  def WriteGLES2ImplementationUnitTest(self, func, file):
+    """Overrriden from TypeHandler."""
+    code = """
+TEST_F(GLES2ImplementationTest, %(name)s) {
+  struct Cmds {
+    %(name)s cmd;
+  };
+  Cmds expected;
+  expected.cmd.Init(%(cmd_args)s);
+
+  gl_->%(name)s(%(args)s);
+  EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
+  ClearCommands();
+  gl_->%(name)s(%(args)s);
+  EXPECT_TRUE(NoCommandsWritten());
+}
+"""
+    cmd_arg_strings = []
+    for count, arg in enumerate(func.GetCmdArgs()):
+      cmd_arg_strings.append(arg.GetValidClientSideCmdArg(func, count, 0))
+      count += 1
+    gl_arg_strings = []
+    for count, arg in enumerate(func.GetOriginalArgs()):
+      gl_arg_strings.append(arg.GetValidClientSideArg(func, count, 0))
+    file.Write(code % {
+          'name': func.name,
+          'args': ", ".join(gl_arg_strings),
+          'cmd_args': ", ".join(cmd_arg_strings),
+        })
+
 
 class GENnHandler(TypeHandler):
   """Handler for glGen___ type functions."""
@@ -6313,8 +6399,11 @@ class GLGenerator(object):
 
   def GetTypeHandler(self, name):
     """Gets a type info for the given type."""
-    if name in self._type_handlers:
-      return self._type_handlers[name]
+    if len(name):
+      if name in self._type_handlers:
+        return self._type_handlers[name]
+      else:
+        raise KeyError("no such type handler: %s" % name)
     return self._empty_type_handler
 
   def GetFunctionInfo(self, name):
@@ -6488,8 +6577,8 @@ class GLGenerator(object):
 
     file.Close()
 
-  def WriteContextStateHeader(self, filename):
-    """Writes the context state header."""
+  def WriteServiceContextStateHeader(self, filename):
+    """Writes the service context state header."""
     file = CHeaderWriter(
         filename,
         "// It is included by context_state.h\n")
@@ -6507,8 +6596,64 @@ class GLGenerator(object):
 
     file.Close()
 
-  def WriteContextStateImpl(self, filename):
-    """Writes the context state implementation."""
+  def WriteClientContextStateHeader(self, filename):
+    """Writes the client context state header."""
+    file = CHeaderWriter(
+        filename,
+        "// It is included by client_context_state.h\n")
+    file.Write("struct EnableFlags {\n")
+    file.Write("  EnableFlags();\n")
+    for capability in _CAPABILITY_FLAGS:
+      file.Write("  bool %s;\n" % capability['name'])
+    file.Write("};\n\n")
+
+    file.Close()
+
+  def WriteContextStateGetters(self, file, class_name):
+    """Writes the state getters."""
+    for gl_type in ["GLint", "GLfloat"]:
+      file.Write("""
+bool %s::GetStateAs%s(
+    GLenum pname, %s* params, GLsizei* num_written) const {
+  switch (pname) {
+""" % (class_name, gl_type, gl_type))
+      for state_name in _STATES.keys():
+        state = _STATES[state_name]
+        if 'enum' in state:
+          file.Write("    case %s:\n" % state['enum'])
+          file.Write("      *num_written = %d;\n" % len(state['states']))
+          file.Write("      if (params) {\n")
+          for ndx,item in enumerate(state['states']):
+            file.Write("        params[%d] = static_cast<%s>(%s);\n" %
+                       (ndx, gl_type, item['name']))
+          file.Write("      }\n")
+          file.Write("      return true;\n")
+        else:
+          for item in state['states']:
+            file.Write("    case %s:\n" % item['enum'])
+            file.Write("      *num_written = 1;\n")
+            file.Write("      if (params) {\n")
+            file.Write("        params[0] = static_cast<%s>(%s);\n" %
+                       (gl_type, item['name']))
+            file.Write("      }\n")
+            file.Write("      return true;\n")
+      for capability in _CAPABILITY_FLAGS:
+            file.Write("    case GL_%s:\n" % capability['name'].upper())
+            file.Write("      *num_written = 1;\n")
+            file.Write("      if (params) {\n")
+            file.Write(
+                "        params[0] = static_cast<%s>(enable_flags.%s);\n" %
+                (gl_type, capability['name']))
+            file.Write("      }\n")
+            file.Write("      return true;\n")
+      file.Write("""    default:
+      return false;
+  }
+}
+""")
+
+  def WriteServiceContextStateImpl(self, filename):
+    """Writes the context state service implementation."""
     file = CHeaderWriter(
         filename,
         "// It is included by context_state.cc\n")
@@ -6558,6 +6703,69 @@ void ContextState::InitState() const {
         file.Write("  gl%s(%s);\n" % (state['func'], ", ".join(args)))
     file.Write("}\n")
 
+    file.Write("""bool ContextState::GetEnabled(GLenum cap) const {
+  switch (cap) {
+""")
+    for capability in _CAPABILITY_FLAGS:
+      file.Write("    case GL_%s:\n" % capability['name'].upper())
+      file.Write("      return enable_flags.%s;\n" % capability['name'])
+    file.Write("""    default:
+      GPU_NOTREACHED();
+      return false;
+  }
+}
+""")
+
+    self.WriteContextStateGetters(file, "ContextState")
+    file.Close()
+
+  def WriteClientContextStateImpl(self, filename):
+    """Writes the context state client side implementation."""
+    file = CHeaderWriter(
+        filename,
+        "// It is included by client_context_state.cc\n")
+    code = []
+    for capability in _CAPABILITY_FLAGS:
+      code.append("%s(%s)" %
+                  (capability['name'],
+                   ('false', 'true')['default' in capability]))
+    file.Write(
+      "ClientContextState::EnableFlags::EnableFlags()\n    : %s {\n}\n" %
+      ",\n      ".join(code))
+    file.Write("\n")
+
+    file.Write("""
+bool ClientContextState::SetCapabilityState(
+    GLenum cap, bool enabled, bool* changed) {
+  *changed = false;
+  switch (cap) {
+""")
+    for capability in _CAPABILITY_FLAGS:
+      file.Write("    case GL_%s:\n" % capability['name'].upper())
+      file.Write("""      if (enable_flags.%(name)s != enabled) {
+         *changed = true;
+         enable_flags.%(name)s = enabled;
+      }
+      return true;
+""" % capability)
+    file.Write("""    default:
+      return false;
+  }
+}
+""")
+    file.Write("""bool ClientContextState::GetEnabled(
+    GLenum cap, bool* enabled) const {
+  switch (cap) {
+""")
+    for capability in _CAPABILITY_FLAGS:
+      file.Write("    case GL_%s:\n" % capability['name'].upper())
+      file.Write("      *enabled = enable_flags.%s;\n" % capability['name'])
+      file.Write("      return true;\n")
+    file.Write("""    default:
+      return false;
+  }
+}
+""")
     file.Close()
 
   def WriteServiceImplementation(self, filename):
@@ -6594,59 +6802,6 @@ bool GLES2DecoderImpl::SetCapabilityState(GLenum cap, bool enabled) {
       return false;
   }
 }
-
-bool GLES2DecoderImpl::DoIsEnabled(GLenum cap) {
-  switch (cap) {
-""")
-    for capability in _CAPABILITY_FLAGS:
-      file.Write("    case GL_%s:\n" % capability['name'].upper())
-      file.Write("      return state_.enable_flags.%s;\n" %
-                 capability['name'])
-    file.Write("""    default:
-      NOTREACHED();
-      return false;
-  }
-}
-""")
-    for gl_type in ["GLint", "GLfloat"]:
-      file.Write("""
-bool GLES2DecoderImpl::GetStateAs%s(
-    GLenum pname, %s* params, GLsizei* num_written) {
-  switch (pname) {
-""" % (gl_type, gl_type))
-      for state_name in _STATES.keys():
-        state = _STATES[state_name]
-        if 'enum' in state:
-          file.Write("    case %s:\n" % state['enum'])
-          file.Write("      *num_written = %d;\n" % len(state['states']))
-          file.Write("      if (params) {\n")
-          for ndx,item in enumerate(state['states']):
-            file.Write("        params[%d] = static_cast<%s>(state_.%s);\n" %
-                       (ndx, gl_type, item['name']))
-          file.Write("      }\n")
-          file.Write("      return true;\n")
-        else:
-          for item in state['states']:
-            file.Write("    case %s:\n" % item['enum'])
-            file.Write("      *num_written = 1;\n")
-            file.Write("      if (params) {\n")
-            file.Write("        params[0] = static_cast<%s>(state_.%s);\n" %
-                       (gl_type, item['name']))
-            file.Write("      }\n")
-            file.Write("      return true;\n")
-      for capability in _CAPABILITY_FLAGS:
-            file.Write("    case GL_%s:\n" % capability['name'].upper())
-            file.Write("      *num_written = 1;\n")
-            file.Write("      if (params) {\n")
-            file.Write("        params[0] = static_cast<%s>("
-                       "state_.enable_flags.%s);\n" %
-                       (gl_type, capability['name']))
-            file.Write("      }\n")
-            file.Write("      return true;\n")
-      file.Write("""    default:
-      return false;
-  }
-}
 """)
     file.Close()
 
@@ -7178,8 +7333,11 @@ def main(argv):
     gen.WriteGLES2CLibImplementation("client/gles2_c_lib_autogen.h")
     gen.WriteCmdHelperHeader("client/gles2_cmd_helper_autogen.h")
     gen.WriteServiceImplementation("service/gles2_cmd_decoder_autogen.h")
-    gen.WriteContextStateHeader("service/context_state_autogen.h")
-    gen.WriteContextStateImpl("service/context_state_impl_autogen.h")
+    gen.WriteServiceContextStateHeader("service/context_state_autogen.h")
+    gen.WriteServiceContextStateImpl("service/context_state_impl_autogen.h")
+    gen.WriteClientContextStateHeader("client/client_context_state_autogen.h")
+    gen.WriteClientContextStateImpl(
+        "client/client_context_state_impl_autogen.h")
     gen.WriteServiceUnitTests("service/gles2_cmd_decoder_unittest_%d_autogen.h")
     gen.WriteServiceUtilsHeader("service/gles2_cmd_validation_autogen.h")
     gen.WriteServiceUtilsImplementation(
diff --git a/gpu/command_buffer/client/client_context_state.cc b/gpu/command_buffer/client/client_context_state.cc
new file mode 100644
index 0000000..84a262e
--- /dev/null
+++ b/gpu/command_buffer/client/client_context_state.cc
@@ -0,0 +1,25 @@
+// 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 "../client/client_context_state.h"
+#include "../common/logging.h"
+
+namespace gpu {
+namespace gles2 {
+
+ClientContextState::ClientContextState() {
+}
+
+ClientContextState::~ClientContextState() {
+}
+
+// Include the auto-generated part of this file. We split this because it means
+// we can easily edit the non-auto generated parts right here in this file
+// instead of having to edit some template or the code generator.
+#include "gpu/command_buffer/client/client_context_state_impl_autogen.h"
+
+}  // namespace gles2
+}  // namespace gpu
+
+
diff --git a/gpu/command_buffer/client/client_context_state.h b/gpu/command_buffer/client/client_context_state.h
new file mode 100644
index 0000000..f5a93a6
--- /dev/null
+++ b/gpu/command_buffer/client/client_context_state.h
@@ -0,0 +1,39 @@
+// 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.
+
+// This file contains the ContextState class.
+
+#ifndef GPU_COMMAND_BUFFER_CLIENT_CLIENT_CONTEXT_STATE_H_
+#define GPU_COMMAND_BUFFER_CLIENT_CLIENT_CONTEXT_STATE_H_
+
+#include <GLES2/gl2.h>
+#include <vector>
+#include "gles2_impl_export.h"
+
+namespace gpu {
+namespace gles2 {
+
+struct GLES2_IMPL_EXPORT ClientContextState {
+  ClientContextState();
+  ~ClientContextState();
+
+  // Returns true if state was cached in which case 'enabled' will be set to the
+  // current state.
+  bool GetEnabled(GLenum cap, bool* enabled) const;
+
+  // Sets the state of a capability.
+  // Returns true if the capability is one that is cached.
+  // 'changed' will be true if the state was different from 'enabled.
+  bool SetCapabilityState(GLenum cap, bool enabled, bool* changed);
+
+  #include "gpu/command_buffer/client/client_context_state_autogen.h"
+
+  EnableFlags enable_flags;
+};
+
+}  // namespace gles2
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_CLIENT_CLIENT_CONTEXT_STATE_H_
+
diff --git a/gpu/command_buffer/client/client_context_state_autogen.h b/gpu/command_buffer/client/client_context_state_autogen.h
new file mode 100644
index 0000000..1714b2b
--- /dev/null
+++ b/gpu/command_buffer/client/client_context_state_autogen.h
@@ -0,0 +1,27 @@
+// 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.
+
+// This file is auto-generated from
+// gpu/command_buffer/build_gles2_cmd_buffer.py
+// DO NOT EDIT!
+
+// It is included by client_context_state.h
+#ifndef GPU_COMMAND_BUFFER_CLIENT_CLIENT_CONTEXT_STATE_AUTOGEN_H_
+#define GPU_COMMAND_BUFFER_CLIENT_CLIENT_CONTEXT_STATE_AUTOGEN_H_
+
+struct EnableFlags {
+  EnableFlags();
+  bool blend;
+  bool cull_face;
+  bool depth_test;
+  bool dither;
+  bool polygon_offset_fill;
+  bool sample_alpha_to_coverage;
+  bool sample_coverage;
+  bool scissor_test;
+  bool stencil_test;
+};
+
+#endif  // GPU_COMMAND_BUFFER_CLIENT_CLIENT_CONTEXT_STATE_AUTOGEN_H_
+
diff --git a/gpu/command_buffer/client/client_context_state_impl_autogen.h b/gpu/command_buffer/client/client_context_state_impl_autogen.h
new file mode 100644
index 0000000..150816d
--- /dev/null
+++ b/gpu/command_buffer/client/client_context_state_impl_autogen.h
@@ -0,0 +1,123 @@
+// 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.
+
+// This file is auto-generated from
+// gpu/command_buffer/build_gles2_cmd_buffer.py
+// DO NOT EDIT!
+
+// It is included by client_context_state.cc
+#ifndef GPU_COMMAND_BUFFER_CLIENT_CLIENT_CONTEXT_STATE_IMPL_AUTOGEN_H_
+#define GPU_COMMAND_BUFFER_CLIENT_CLIENT_CONTEXT_STATE_IMPL_AUTOGEN_H_
+
+ClientContextState::EnableFlags::EnableFlags()
+    : blend(false),
+      cull_face(false),
+      depth_test(false),
+      dither(true),
+      polygon_offset_fill(false),
+      sample_alpha_to_coverage(false),
+      sample_coverage(false),
+      scissor_test(false),
+      stencil_test(false) {
+}
+
+
+bool ClientContextState::SetCapabilityState(
+    GLenum cap, bool enabled, bool* changed) {
+  *changed = false;
+  switch (cap) {
+    case GL_BLEND:
+      if (enable_flags.blend != enabled) {
+         *changed = true;
+         enable_flags.blend = enabled;
+      }
+      return true;
+    case GL_CULL_FACE:
+      if (enable_flags.cull_face != enabled) {
+         *changed = true;
+         enable_flags.cull_face = enabled;
+      }
+      return true;
+    case GL_DEPTH_TEST:
+      if (enable_flags.depth_test != enabled) {
+         *changed = true;
+         enable_flags.depth_test = enabled;
+      }
+      return true;
+    case GL_DITHER:
+      if (enable_flags.dither != enabled) {
+         *changed = true;
+         enable_flags.dither = enabled;
+      }
+      return true;
+    case GL_POLYGON_OFFSET_FILL:
+      if (enable_flags.polygon_offset_fill != enabled) {
+         *changed = true;
+         enable_flags.polygon_offset_fill = enabled;
+      }
+      return true;
+    case GL_SAMPLE_ALPHA_TO_COVERAGE:
+      if (enable_flags.sample_alpha_to_coverage != enabled) {
+         *changed = true;
+         enable_flags.sample_alpha_to_coverage = enabled;
+      }
+      return true;
+    case GL_SAMPLE_COVERAGE:
+      if (enable_flags.sample_coverage != enabled) {
+         *changed = true;
+         enable_flags.sample_coverage = enabled;
+      }
+      return true;
+    case GL_SCISSOR_TEST:
+      if (enable_flags.scissor_test != enabled) {
+         *changed = true;
+         enable_flags.scissor_test = enabled;
+      }
+      return true;
+    case GL_STENCIL_TEST:
+      if (enable_flags.stencil_test != enabled) {
+         *changed = true;
+         enable_flags.stencil_test = enabled;
+      }
+      return true;
+    default:
+      return false;
+  }
+}
+bool ClientContextState::GetEnabled(
+    GLenum cap, bool* enabled) const {
+  switch (cap) {
+    case GL_BLEND:
+      *enabled = enable_flags.blend;
+      return true;
+    case GL_CULL_FACE:
+      *enabled = enable_flags.cull_face;
+      return true;
+    case GL_DEPTH_TEST:
+      *enabled = enable_flags.depth_test;
+      return true;
+    case GL_DITHER:
+      *enabled = enable_flags.dither;
+      return true;
+    case GL_POLYGON_OFFSET_FILL:
+      *enabled = enable_flags.polygon_offset_fill;
+      return true;
+    case GL_SAMPLE_ALPHA_TO_COVERAGE:
+      *enabled = enable_flags.sample_alpha_to_coverage;
+      return true;
+    case GL_SAMPLE_COVERAGE:
+      *enabled = enable_flags.sample_coverage;
+      return true;
+    case GL_SCISSOR_TEST:
+      *enabled = enable_flags.scissor_test;
+      return true;
+    case GL_STENCIL_TEST:
+      *enabled = enable_flags.stencil_test;
+      return true;
+    default:
+      return false;
+  }
+}
+#endif  // GPU_COMMAND_BUFFER_CLIENT_CLIENT_CONTEXT_STATE_IMPL_AUTOGEN_H_
+
diff --git a/gpu/command_buffer/client/gles2_implementation.cc b/gpu/command_buffer/client/gles2_implementation.cc
index 8960cff..8f67194 100644
--- a/gpu/command_buffer/client/gles2_implementation.cc
+++ b/gpu/command_buffer/client/gles2_implementation.cc
@@ -391,7 +391,7 @@ const size_t GLES2Implementation::kMaxSizeOfSimpleResult;
 const unsigned int GLES2Implementation::kStartingOffset;
 #endif
 
-GLES2Implementation::GLCachedState::IntState::IntState()
+GLES2Implementation::GLStaticState::IntState::IntState()
     : max_combined_texture_image_units(0),
       max_cube_map_texture_size(0),
       max_fragment_uniform_vectors(0),
@@ -437,6 +437,7 @@ GLES2Implementation::GLES2Implementation(
       active_texture_unit_(0),
       bound_framebuffer_(0),
       bound_renderbuffer_(0),
+      current_program_(0),
       bound_array_buffer_id_(0),
       bound_element_array_buffer_id_(0),
       client_side_array_id_(0),
@@ -503,16 +504,17 @@ bool GLES2Implementation::Initialize(
 
   GetMultipleIntegervCHROMIUM(
       pnames, arraysize(pnames),
-      &gl_state_.int_state.max_combined_texture_image_units,
-      sizeof(gl_state_.int_state));
+      &static_state_.int_state.max_combined_texture_image_units,
+      sizeof(static_state_.int_state));
 
   util_.set_num_compressed_texture_formats(
-      gl_state_.int_state.num_compressed_texture_formats);
+      static_state_.int_state.num_compressed_texture_formats);
   util_.set_num_shader_binary_formats(
-      gl_state_.int_state.num_shader_binary_formats);
+      static_state_.int_state.num_shader_binary_formats);
 
   texture_units_.reset(
-      new TextureUnit[gl_state_.int_state.max_combined_texture_image_units]);
+      new TextureUnit[
+          static_state_.int_state.max_combined_texture_image_units]);
 
   query_tracker_.reset(new QueryTracker(mapped_memory_.get()));
 
@@ -521,7 +523,7 @@ bool GLES2Implementation::Initialize(
       this, kClientSideArrayId, arraysize(reserved_ids_), &reserved_ids_[0]);
 
   client_side_buffer_helper_.reset(new ClientSideBufferHelper(
-      gl_state_.int_state.max_vertex_attribs,
+      static_state_.int_state.max_vertex_attribs,
       reserved_ids_[0],
       reserved_ids_[1]));
 #endif
@@ -810,54 +812,24 @@ void GLES2Implementation::SetBucketAsString(
   SetBucketContents(bucket_id, str.c_str(), str.size() + 1);
 }
 
-bool GLES2Implementation::SetCapabilityState(GLenum cap, bool enabled) {
-  switch (cap) {
-    case GL_DITHER:
-      gl_state_.enable_state.dither = enabled;
-      return true;
-    case GL_BLEND:
-      gl_state_.enable_state.blend = enabled;
-      return true;
-    case GL_CULL_FACE:
-      gl_state_.enable_state.cull_face = enabled;
-      return true;
-    case GL_DEPTH_TEST:
-      gl_state_.enable_state.depth_test = enabled;
-      return true;
-    case GL_POLYGON_OFFSET_FILL:
-      gl_state_.enable_state.polygon_offset_fill = enabled;
-      return true;
-    case GL_SAMPLE_ALPHA_TO_COVERAGE:
-      gl_state_.enable_state.sample_alpha_to_coverage = enabled;
-      return true;
-    case GL_SAMPLE_COVERAGE:
-      gl_state_.enable_state.sample_coverage = enabled;
-      return true;
-    case GL_SCISSOR_TEST:
-      gl_state_.enable_state.scissor_test = enabled;
-      return true;
-    case GL_STENCIL_TEST:
-      gl_state_.enable_state.stencil_test = enabled;
-      return true;
-    default:
-      return false;
-  }
-}
-
 void GLES2Implementation::Disable(GLenum cap) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glDisable("
                  << GLES2Util::GetStringCapability(cap) << ")");
-  SetCapabilityState(cap, false);
-  helper_->Disable(cap);
+  bool changed = false;
+  if (!state_.SetCapabilityState(cap, false, &changed) || changed) {
+    helper_->Disable(cap);
+  }
 }
 
 void GLES2Implementation::Enable(GLenum cap) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glEnable("
                  << GLES2Util::GetStringCapability(cap) << ")");
-  SetCapabilityState(cap, true);
-  helper_->Enable(cap);
+  bool changed = false;
+  if (!state_.SetCapabilityState(cap, true, &changed) || changed) {
+    helper_->Enable(cap);
+  }
 }
 
 GLboolean GLES2Implementation::IsEnabled(GLenum cap) {
@@ -865,47 +837,18 @@ GLboolean GLES2Implementation::IsEnabled(GLenum cap) {
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glIsEnabled("
                  << GLES2Util::GetStringCapability(cap) << ")");
   bool state = false;
-  switch (cap) {
-    case GL_DITHER:
-      state = gl_state_.enable_state.dither;
-      break;
-    case GL_BLEND:
-      state = gl_state_.enable_state.blend;
-      break;
-    case GL_CULL_FACE:
-      state = gl_state_.enable_state.cull_face;
-      break;
-    case GL_DEPTH_TEST:
-      state = gl_state_.enable_state.depth_test;
-      break;
-    case GL_POLYGON_OFFSET_FILL:
-      state = gl_state_.enable_state.polygon_offset_fill;
-      break;
-    case GL_SAMPLE_ALPHA_TO_COVERAGE:
-      state = gl_state_.enable_state.sample_alpha_to_coverage;
-      break;
-    case GL_SAMPLE_COVERAGE:
-      state = gl_state_.enable_state.sample_coverage;
-      break;
-    case GL_SCISSOR_TEST:
-      state = gl_state_.enable_state.scissor_test;
-      break;
-    case GL_STENCIL_TEST:
-      state = gl_state_.enable_state.stencil_test;
-      break;
-    default: {
-      typedef IsEnabled::Result Result;
-      Result* result = GetResultAs<Result*>();
-      if (!result) {
-        return GL_FALSE;
-      }
-      *result = 0;
-      helper_->IsEnabled(cap, GetResultShmId(), GetResultShmOffset());
-      WaitForCmd();
-      state = (*result) != 0;
-      break;
+  if (!state_.GetEnabled(cap, &state)) {
+    typedef IsEnabled::Result Result;
+    Result* result = GetResultAs<Result*>();
+    if (!result) {
+      return GL_FALSE;
     }
+    *result = 0;
+    helper_->IsEnabled(cap, GetResultShmId(), GetResultShmOffset());
+    WaitForCmd();
+    state = (*result) != 0;
   }
+
   GPU_CLIENT_LOG("returned " << state);
   return state;
 }
@@ -913,40 +856,40 @@ GLboolean GLES2Implementation::IsEnabled(GLenum cap) {
 bool GLES2Implementation::GetHelper(GLenum pname, GLint* params) {
   switch (pname) {
     case GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
-      *params = gl_state_.int_state.max_combined_texture_image_units;
+      *params = static_state_.int_state.max_combined_texture_image_units;
       return true;
     case GL_MAX_CUBE_MAP_TEXTURE_SIZE:
-      *params = gl_state_.int_state.max_cube_map_texture_size;
+      *params = static_state_.int_state.max_cube_map_texture_size;
       return true;
     case GL_MAX_FRAGMENT_UNIFORM_VECTORS:
-      *params = gl_state_.int_state.max_fragment_uniform_vectors;
+      *params = static_state_.int_state.max_fragment_uniform_vectors;
       return true;
     case GL_MAX_RENDERBUFFER_SIZE:
-      *params = gl_state_.int_state.max_renderbuffer_size;
+      *params = static_state_.int_state.max_renderbuffer_size;
       return true;
     case GL_MAX_TEXTURE_IMAGE_UNITS:
-      *params = gl_state_.int_state.max_texture_image_units;
+      *params = static_state_.int_state.max_texture_image_units;
       return true;
     case GL_MAX_TEXTURE_SIZE:
-      *params = gl_state_.int_state.max_texture_size;
+      *params = static_state_.int_state.max_texture_size;
       return true;
     case GL_MAX_VARYING_VECTORS:
-      *params = gl_state_.int_state.max_varying_vectors;
+      *params = static_state_.int_state.max_varying_vectors;
       return true;
     case GL_MAX_VERTEX_ATTRIBS:
-      *params = gl_state_.int_state.max_vertex_attribs;
+      *params = static_state_.int_state.max_vertex_attribs;
       return true;
     case GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
-      *params = gl_state_.int_state.max_vertex_texture_image_units;
+      *params = static_state_.int_state.max_vertex_texture_image_units;
       return true;
     case GL_MAX_VERTEX_UNIFORM_VECTORS:
-      *params = gl_state_.int_state.max_vertex_uniform_vectors;
+      *params = static_state_.int_state.max_vertex_uniform_vectors;
       return true;
     case GL_NUM_COMPRESSED_TEXTURE_FORMATS:
-      *params = gl_state_.int_state.num_compressed_texture_formats;
+      *params = static_state_.int_state.num_compressed_texture_formats;
       return true;
     case GL_NUM_SHADER_BINARY_FORMATS:
-      *params = gl_state_.int_state.num_shader_binary_formats;
+      *params = static_state_.int_state.num_shader_binary_formats;
       return true;
     case GL_ARRAY_BUFFER_BINDING:
       if (share_group_->bind_generates_resource()) {
@@ -1316,6 +1259,9 @@ bool GLES2Implementation::DeleteProgramHelper(GLuint program) {
         "glDeleteProgram", "id not created by this context.");
     return false;
   }
+  if (program == current_program_) {
+    current_program_ = 0;
+  }
   return true;
 }
 
@@ -1401,6 +1347,15 @@ GLint GLES2Implementation::GetUniformLocation(
   return loc;
 }
 
+void GLES2Implementation::UseProgram(GLuint program) {
+  GPU_CLIENT_SINGLE_THREAD_CHECK();
+  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glUseProgram(" << program << ")");
+  if (current_program_ != program) {
+    current_program_ = program;
+    helper_->UseProgram(program);
+  }
+}
+
 bool GLES2Implementation::GetProgramivHelper(
     GLuint program, GLenum pname, GLint* params) {
   bool got_value = share_group_->program_info_manager()->GetProgramiv(
@@ -2390,7 +2345,7 @@ void GLES2Implementation::ActiveTexture(GLenum texture) {
       << GLES2Util::GetStringEnum(texture) << ")");
   GLuint texture_index = texture - GL_TEXTURE0;
   if (texture_index >= static_cast<GLuint>(
-      gl_state_.int_state.max_combined_texture_image_units)) {
+      static_state_.int_state.max_combined_texture_image_units)) {
     SetGLErrorInvalidEnum(
         "glActiveTexture", texture, "texture");
     return;
@@ -2407,77 +2362,111 @@ void GLES2Implementation::ActiveTexture(GLenum texture) {
 // the old model but possibly not true in the new model if another context has
 // deleted the resource.
 
-void GLES2Implementation::BindBufferHelper(
+bool GLES2Implementation::BindBufferHelper(
     GLenum target, GLuint buffer) {
   // TODO(gman): See note #1 above.
+  bool changed = false;
   switch (target) {
     case GL_ARRAY_BUFFER:
-      bound_array_buffer_id_ = buffer;
+      if (bound_array_buffer_id_ != buffer) {
+        bound_array_buffer_id_ = buffer;
+        changed = true;
+      }
       break;
     case GL_ELEMENT_ARRAY_BUFFER:
-      bound_element_array_buffer_id_ = buffer;
+      if (bound_element_array_buffer_id_ != buffer) {
+        bound_element_array_buffer_id_ = buffer;
+        changed = true;
+      }
       break;
     default:
+      changed = true;
       break;
   }
   // TODO(gman): There's a bug here. If the target is invalid the ID will not be
   // used even though it's marked it as used here.
   GetIdHandler(id_namespaces::kBuffers)->MarkAsUsedForBind(buffer);
+  return changed;
 }
 
-void GLES2Implementation::BindFramebufferHelper(
+bool GLES2Implementation::BindFramebufferHelper(
     GLenum target, GLuint framebuffer) {
   // TODO(gman): See note #1 above.
+  bool changed = false;
   switch (target) {
     case GL_FRAMEBUFFER:
-      bound_framebuffer_ = framebuffer;
+      if (bound_framebuffer_ != framebuffer) {
+        bound_framebuffer_ = framebuffer;
+        changed = true;
+      }
       break;
     default:
+      changed = true;
       break;
   }
   // TODO(gman): There's a bug here. If the target is invalid the ID will not be
   // used even though it's marked it as used here.
   GetIdHandler(id_namespaces::kFramebuffers)->MarkAsUsedForBind(framebuffer);
+  return changed;
 }
 
-void GLES2Implementation::BindRenderbufferHelper(
+bool GLES2Implementation::BindRenderbufferHelper(
     GLenum target, GLuint renderbuffer) {
   // TODO(gman): See note #1 above.
+  bool changed = false;
   switch (target) {
     case GL_RENDERBUFFER:
-      bound_renderbuffer_ = renderbuffer;
+      if (bound_renderbuffer_ != renderbuffer) {
+        bound_renderbuffer_ = renderbuffer;
+        changed = true;
+      }
       break;
     default:
+      changed = true;
       break;
   }
   // TODO(gman): There's a bug here. If the target is invalid the ID will not be
   // used even though it's marked it as used here.
   GetIdHandler(id_namespaces::kRenderbuffers)->MarkAsUsedForBind(renderbuffer);
+  return changed;
 }
 
-void GLES2Implementation::BindTextureHelper(GLenum target, GLuint texture) {
+bool GLES2Implementation::BindTextureHelper(GLenum target, GLuint texture) {
   // TODO(gman): See note #1 above.
+  bool changed = false;
   TextureUnit& unit = texture_units_[active_texture_unit_];
   switch (target) {
     case GL_TEXTURE_2D:
-      unit.bound_texture_2d = texture;
+      if (unit.bound_texture_2d != texture) {
+        unit.bound_texture_2d = texture;
+        changed = true;
+      }
       break;
     case GL_TEXTURE_CUBE_MAP:
-      unit.bound_texture_cube_map = texture;
+      if (unit.bound_texture_cube_map != texture) {
+        unit.bound_texture_cube_map = texture;
+        changed = true;
+      }
       break;
     default:
+      changed = true;
       break;
   }
   // TODO(gman): There's a bug here. If the target is invalid the ID will not be
   // used. even though it's marked it as used here.
   GetIdHandler(id_namespaces::kTextures)->MarkAsUsedForBind(texture);
+  return changed;
 }
 
-void GLES2Implementation::BindVertexArrayHelper(GLuint array) {
+bool GLES2Implementation::BindVertexArrayHelper(GLuint array) {
   // TODO(gman): See note #1 above.
-  bound_vertex_array_id_ = array;
-
+  bool changed = false;
+  if (bound_vertex_array_id_ != array) {
+    bound_vertex_array_id_ = array;
+    changed = true;
+  }
   GetIdHandler(id_namespaces::kVertexArrays)->MarkAsUsedForBind(array);
+  return changed;
 }
 
 #if defined(GLES2_SUPPORT_CLIENT_SIDE_ARRAYS)
@@ -2573,7 +2562,7 @@ void GLES2Implementation::DeleteTexturesHelper(
   }
   for (GLsizei ii = 0; ii < n; ++ii) {
     for (GLint tt = 0;
-         tt < gl_state_.int_state.max_combined_texture_image_units;
+         tt < static_state_.int_state.max_combined_texture_image_units;
          ++tt) {
       TextureUnit& unit = texture_units_[tt];
       if (textures[ii] == unit.bound_texture_2d) {
diff --git a/gpu/command_buffer/client/gles2_implementation.h b/gpu/command_buffer/client/gles2_implementation.h
index 47fb3b0..1ba9acd 100644
--- a/gpu/command_buffer/client/gles2_implementation.h
+++ b/gpu/command_buffer/client/gles2_implementation.h
@@ -18,6 +18,7 @@
 #include "../common/gles2_cmd_utils.h"
 #include "../common/scoped_ptr.h"
 #include "../client/ref_counted.h"
+#include "../client/client_context_state.h"
 #include "../client/gles2_cmd_helper.h"
 #include "../client/gles2_interface.h"
 #include "../client/query_tracker.h"
@@ -108,8 +109,8 @@ class GLES2_IMPL_EXPORT GLES2Implementation : public GLES2Interface {
     virtual void OnErrorMessage(const char* msg, int id) = 0;
   };
 
-  // Stores client side cached GL state.
-  struct GLCachedState {
+  // Stores GL state that never changes.
+  struct GLStaticState {
     struct GLES2_IMPL_EXPORT IntState {
       IntState();
       GLint max_combined_texture_image_units;
@@ -125,32 +126,7 @@ class GLES2_IMPL_EXPORT GLES2Implementation : public GLES2Interface {
       GLint num_compressed_texture_formats;
       GLint num_shader_binary_formats;
     };
-    struct EnableState {
-      EnableState()
-          : blend(false),
-            cull_face(false),
-            depth_test(false),
-            dither(false),
-            polygon_offset_fill(false),
-            sample_alpha_to_coverage(false),
-            sample_coverage(false),
-            scissor_test(false),
-            stencil_test(false) {
-      }
-
-      bool blend;
-      bool cull_face;
-      bool depth_test;
-      bool dither;
-      bool polygon_offset_fill;
-      bool sample_alpha_to_coverage;
-      bool sample_coverage;
-      bool scissor_test;
-      bool stencil_test;
-    };
-
     IntState int_state;
-    EnableState enable_state;
   };
 
   // The maxiumum result size from simple GL get commands.
@@ -406,11 +382,11 @@ class GLES2_IMPL_EXPORT GLES2Implementation : public GLES2Interface {
   bool IsTextureReservedId(GLuint id) { return false; }
   bool IsVertexArrayReservedId(GLuint id) { return false; }
 
-  void BindBufferHelper(GLenum target, GLuint texture);
-  void BindFramebufferHelper(GLenum target, GLuint texture);
-  void BindRenderbufferHelper(GLenum target, GLuint texture);
-  void BindTextureHelper(GLenum target, GLuint texture);
-  void BindVertexArrayHelper(GLuint array);
+  bool BindBufferHelper(GLenum target, GLuint texture);
+  bool BindFramebufferHelper(GLenum target, GLuint texture);
+  bool BindRenderbufferHelper(GLenum target, GLuint texture);
+  bool BindTextureHelper(GLenum target, GLuint texture);
+  bool BindVertexArrayHelper(GLuint array);
 
   void DeleteBuffersHelper(GLsizei n, const GLuint* buffers);
   void DeleteFramebuffersHelper(GLsizei n, const GLuint* framebuffers);
@@ -497,7 +473,8 @@ class GLES2_IMPL_EXPORT GLES2Implementation : public GLES2Interface {
 
   ExtensionStatus angle_pack_reverse_row_order_status;
 
-  GLCachedState gl_state_;
+  GLStaticState static_state_;
+  ClientContextState state_;
 
   // pack alignment as last set by glPixelStorei
   GLint pack_alignment_;
@@ -528,6 +505,9 @@ class GLES2_IMPL_EXPORT GLES2Implementation : public GLES2Interface {
   GLuint bound_framebuffer_;
   GLuint bound_renderbuffer_;
 
+  // The program in use by glUseProgram
+  GLuint current_program_;
+
   // The currently bound array buffer.
   GLuint bound_array_buffer_id_;
 
diff --git a/gpu/command_buffer/client/gles2_implementation_impl_autogen.h b/gpu/command_buffer/client/gles2_implementation_impl_autogen.h
index 2ffd65c..a2b9227 100644
--- a/gpu/command_buffer/client/gles2_implementation_impl_autogen.h
+++ b/gpu/command_buffer/client/gles2_implementation_impl_autogen.h
@@ -24,8 +24,9 @@ void GLES2Implementation::BindBuffer(GLenum target, GLuint buffer) {
     SetGLError(GL_INVALID_OPERATION, "BindBuffer", "buffer reserved id");
     return;
   }
-  BindBufferHelper(target, buffer);
-  helper_->BindBuffer(target, buffer);
+  if (BindBufferHelper(target, buffer)) {
+    helper_->BindBuffer(target, buffer);
+  }
 }
 
 void GLES2Implementation::BindFramebuffer(GLenum target, GLuint framebuffer) {
@@ -36,8 +37,9 @@ void GLES2Implementation::BindFramebuffer(GLenum target, GLuint framebuffer) {
         GL_INVALID_OPERATION, "BindFramebuffer", "framebuffer reserved id");
     return;
   }
-  BindFramebufferHelper(target, framebuffer);
-  helper_->BindFramebuffer(target, framebuffer);
+  if (BindFramebufferHelper(target, framebuffer)) {
+    helper_->BindFramebuffer(target, framebuffer);
+  }
 }
 
 void GLES2Implementation::BindRenderbuffer(
@@ -49,8 +51,9 @@ void GLES2Implementation::BindRenderbuffer(
         GL_INVALID_OPERATION, "BindRenderbuffer", "renderbuffer reserved id");
     return;
   }
-  BindRenderbufferHelper(target, renderbuffer);
-  helper_->BindRenderbuffer(target, renderbuffer);
+  if (BindRenderbufferHelper(target, renderbuffer)) {
+    helper_->BindRenderbuffer(target, renderbuffer);
+  }
 }
 
 void GLES2Implementation::BindTexture(GLenum target, GLuint texture) {
@@ -60,8 +63,9 @@ void GLES2Implementation::BindTexture(GLenum target, GLuint texture) {
     SetGLError(GL_INVALID_OPERATION, "BindTexture", "texture reserved id");
     return;
   }
-  BindTextureHelper(target, texture);
-  helper_->BindTexture(target, texture);
+  if (BindTextureHelper(target, texture)) {
+    helper_->BindTexture(target, texture);
+  }
 }
 
 void GLES2Implementation::BlendColor(
@@ -1192,12 +1196,6 @@ void GLES2Implementation::UniformMatrix4fv(
   helper_->UniformMatrix4fvImmediate(location, count, transpose, value);
 }
 
-void GLES2Implementation::UseProgram(GLuint program) {
-  GPU_CLIENT_SINGLE_THREAD_CHECK();
-  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glUseProgram(" << program << ")");
-  helper_->UseProgram(program);
-}
-
 void GLES2Implementation::ValidateProgram(GLuint program) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glValidateProgram(" << program << ")");  // NOLINT
@@ -1426,8 +1424,9 @@ void GLES2Implementation::BindVertexArrayOES(GLuint array) {
         GL_INVALID_OPERATION, "BindVertexArrayOES", "array reserved id");
     return;
   }
-  BindVertexArrayHelper(array);
-  helper_->BindVertexArrayOES(array);
+  if (BindVertexArrayHelper(array)) {
+    helper_->BindVertexArrayOES(array);
+  }
 }
 
 void GLES2Implementation::GetTranslatedShaderSourceANGLE(
diff --git a/gpu/command_buffer/client/gles2_implementation_unittest.cc b/gpu/command_buffer/client/gles2_implementation_unittest.cc
index 8844fb4..d203648 100644
--- a/gpu/command_buffer/client/gles2_implementation_unittest.cc
+++ b/gpu/command_buffer/client/gles2_implementation_unittest.cc
@@ -363,8 +363,8 @@ class GLES2ImplementationTest : public testing::Test {
     helper_.reset(new GLES2CmdHelper(command_buffer()));
     helper_->Initialize(kCommandBufferSizeBytes);
 
-    GLES2Implementation::GLCachedState state;
-    GLES2Implementation::GLCachedState::IntState& int_state = state.int_state;
+    GLES2Implementation::GLStaticState state;
+    GLES2Implementation::GLStaticState::IntState& int_state = state.int_state;
     int_state.max_combined_texture_image_units = kMaxCombinedTextureImageUnits;
     int_state.max_cube_map_texture_size = kMaxCubeMapTextureSize;
     int_state.max_fragment_uniform_vectors = kMaxFragmentUniformVectors;
@@ -2555,11 +2555,13 @@ TEST_F(GLES2ImplementationTest, CapabilitiesAreCached) {
     GLenum state = kStates[ii];
     expected.enable_cmd.Init(state);
     GLboolean result = gl_->IsEnabled(state);
-    EXPECT_FALSE(result);
+    EXPECT_EQ(static_cast<GLboolean>(ii == 0), result);
     EXPECT_TRUE(NoCommandsWritten());
     const void* commands = GetPut();
-    gl_->Enable(state);
-    EXPECT_EQ(0, memcmp(&expected, commands, sizeof(expected)));
+    if (!result) {
+      gl_->Enable(state);
+      EXPECT_EQ(0, memcmp(&expected, commands, sizeof(expected)));
+    }
     ClearCommands();
     result = gl_->IsEnabled(state);
     EXPECT_TRUE(result);
@@ -2768,6 +2770,37 @@ TEST_F(GLES2ImplementationTest, VertexArrays) {
 }
 #endif
 
+TEST_F(GLES2ImplementationTest, Disable) {
+  struct Cmds {
+    Disable cmd;
+  };
+  Cmds expected;
+  expected.cmd.Init(GL_DITHER);  // Note: DITHER defaults to enabled.
+
+  gl_->Disable(GL_DITHER);
+  EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
+  // Check it's cached and not called again.
+  ClearCommands();
+  gl_->Disable(GL_DITHER);
+  EXPECT_TRUE(NoCommandsWritten());
+}
+
+TEST_F(GLES2ImplementationTest, Enable) {
+  struct Cmds {
+    Enable cmd;
+  };
+  Cmds expected;
+  expected.cmd.Init(GL_BLEND);  // Note: BLEND defaults to disabled.
+
+  gl_->Enable(GL_BLEND);
+  EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
+  // Check it's cached and not called again.
+  ClearCommands();
+  gl_->Enable(GL_BLEND);
+  EXPECT_TRUE(NoCommandsWritten());
+}
+
+
 #include "gpu/command_buffer/client/gles2_implementation_unittest_autogen.h"
 
 }  // namespace gles2
diff --git a/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h b/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h
index 890df13..304b357 100644
--- a/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h
+++ b/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h
@@ -33,6 +33,9 @@ TEST_F(GLES2ImplementationTest, BindBuffer) {
 
   gl_->BindBuffer(GL_ARRAY_BUFFER, 2);
   EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
+  ClearCommands();
+  gl_->BindBuffer(GL_ARRAY_BUFFER, 2);
+  EXPECT_TRUE(NoCommandsWritten());
 }
 
 TEST_F(GLES2ImplementationTest, BindFramebuffer) {
@@ -44,6 +47,9 @@ TEST_F(GLES2ImplementationTest, BindFramebuffer) {
 
   gl_->BindFramebuffer(GL_FRAMEBUFFER, 2);
   EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
+  ClearCommands();
+  gl_->BindFramebuffer(GL_FRAMEBUFFER, 2);
+  EXPECT_TRUE(NoCommandsWritten());
 }
 
 TEST_F(GLES2ImplementationTest, BindRenderbuffer) {
@@ -55,6 +61,9 @@ TEST_F(GLES2ImplementationTest, BindRenderbuffer) {
 
   gl_->BindRenderbuffer(GL_RENDERBUFFER, 2);
   EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
+  ClearCommands();
+  gl_->BindRenderbuffer(GL_RENDERBUFFER, 2);
+  EXPECT_TRUE(NoCommandsWritten());
 }
 
 TEST_F(GLES2ImplementationTest, BindTexture) {
@@ -66,6 +75,9 @@ TEST_F(GLES2ImplementationTest, BindTexture) {
 
   gl_->BindTexture(GL_TEXTURE_2D, 2);
   EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
+  ClearCommands();
+  gl_->BindTexture(GL_TEXTURE_2D, 2);
+  EXPECT_TRUE(NoCommandsWritten());
 }
 
 TEST_F(GLES2ImplementationTest, BlendColor) {
@@ -84,9 +96,9 @@ TEST_F(GLES2ImplementationTest, BlendEquation) {
     BlendEquation cmd;
   };
   Cmds expected;
-  expected.cmd.Init(GL_FUNC_ADD);
+  expected.cmd.Init(GL_FUNC_SUBTRACT);
 
-  gl_->BlendEquation(GL_FUNC_ADD);
+  gl_->BlendEquation(GL_FUNC_SUBTRACT);
   EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
 }
 
@@ -95,9 +107,9 @@ TEST_F(GLES2ImplementationTest, BlendEquationSeparate) {
     BlendEquationSeparate cmd;
   };
   Cmds expected;
-  expected.cmd.Init(GL_FUNC_ADD, GL_FUNC_ADD);
+  expected.cmd.Init(GL_FUNC_SUBTRACT, GL_FUNC_ADD);
 
-  gl_->BlendEquationSeparate(GL_FUNC_ADD, GL_FUNC_ADD);
+  gl_->BlendEquationSeparate(GL_FUNC_SUBTRACT, GL_FUNC_ADD);
   EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
 }
 
@@ -366,17 +378,6 @@ TEST_F(GLES2ImplementationTest, DetachShader) {
   EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
 }
 
-TEST_F(GLES2ImplementationTest, Disable) {
-  struct Cmds {
-    Disable cmd;
-  };
-  Cmds expected;
-  expected.cmd.Init(GL_BLEND);
-
-  gl_->Disable(GL_BLEND);
-  EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
-}
-
 TEST_F(GLES2ImplementationTest, DisableVertexAttribArray) {
   struct Cmds {
     DisableVertexAttribArray cmd;
@@ -399,17 +400,6 @@ TEST_F(GLES2ImplementationTest, DrawArrays) {
   EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
 }
 
-TEST_F(GLES2ImplementationTest, Enable) {
-  struct Cmds {
-    Enable cmd;
-  };
-  Cmds expected;
-  expected.cmd.Init(GL_BLEND);
-
-  gl_->Enable(GL_BLEND);
-  EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
-}
-
 TEST_F(GLES2ImplementationTest, EnableVertexAttribArray) {
   struct Cmds {
     EnableVertexAttribArray cmd;
@@ -1050,9 +1040,9 @@ TEST_F(GLES2ImplementationTest, StencilOp) {
     StencilOp cmd;
   };
   Cmds expected;
-  expected.cmd.Init(GL_KEEP, GL_KEEP, GL_KEEP);
+  expected.cmd.Init(GL_KEEP, GL_INCR, GL_KEEP);
 
-  gl_->StencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+  gl_->StencilOp(GL_KEEP, GL_INCR, GL_KEEP);
   EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
 }
 
@@ -1061,9 +1051,9 @@ TEST_F(GLES2ImplementationTest, StencilOpSeparate) {
     StencilOpSeparate cmd;
   };
   Cmds expected;
-  expected.cmd.Init(GL_FRONT, GL_KEEP, GL_KEEP, GL_KEEP);
+  expected.cmd.Init(GL_FRONT, GL_INCR, GL_KEEP, GL_KEEP);
 
-  gl_->StencilOpSeparate(GL_FRONT, GL_KEEP, GL_KEEP, GL_KEEP);
+  gl_->StencilOpSeparate(GL_FRONT, GL_INCR, GL_KEEP, GL_KEEP);
   EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
 }
 
@@ -1667,6 +1657,9 @@ TEST_F(GLES2ImplementationTest, BindVertexArrayOES) {
 
   gl_->BindVertexArrayOES(1);
   EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
+  ClearCommands();
+  gl_->BindVertexArrayOES(1);
+  EXPECT_TRUE(NoCommandsWritten());
 }
 // TODO: Implement unit test for GenSharedIdsCHROMIUM
 // TODO: Implement unit test for DeleteSharedIdsCHROMIUM
diff --git a/gpu/command_buffer/service/context_state.h b/gpu/command_buffer/service/context_state.h
index b011ab2..a9fc5d0 100644
--- a/gpu/command_buffer/service/context_state.h
+++ b/gpu/command_buffer/service/context_state.h
@@ -88,6 +88,13 @@ struct GPU_EXPORT ContextState {
   void InitCapabilities() const;
   void InitState() const;
 
+  // Helper for getting cached state.
+  bool GetStateAsGLint(
+      GLenum pname, GLint* params, GLsizei* num_written) const;
+  bool GetStateAsGLfloat(
+      GLenum pname, GLfloat* params, GLsizei* num_written) const;
+  bool GetEnabled(GLenum cap) const;
+
   #include "gpu/command_buffer/service/context_state_autogen.h"
 
   EnableFlags enable_flags;
diff --git a/gpu/command_buffer/service/context_state_impl_autogen.h b/gpu/command_buffer/service/context_state_impl_autogen.h
index c33cb7f..5342435 100644
--- a/gpu/command_buffer/service/context_state_impl_autogen.h
+++ b/gpu/command_buffer/service/context_state_impl_autogen.h
@@ -126,5 +126,631 @@ void ContextState::InitState() const {
       stencil_back_z_pass_op);
   glViewport(viewport_x, viewport_y, viewport_width, viewport_height);
 }
+bool ContextState::GetEnabled(GLenum cap) const {
+  switch (cap) {
+    case GL_BLEND:
+      return enable_flags.blend;
+    case GL_CULL_FACE:
+      return enable_flags.cull_face;
+    case GL_DEPTH_TEST:
+      return enable_flags.depth_test;
+    case GL_DITHER:
+      return enable_flags.dither;
+    case GL_POLYGON_OFFSET_FILL:
+      return enable_flags.polygon_offset_fill;
+    case GL_SAMPLE_ALPHA_TO_COVERAGE:
+      return enable_flags.sample_alpha_to_coverage;
+    case GL_SAMPLE_COVERAGE:
+      return enable_flags.sample_coverage;
+    case GL_SCISSOR_TEST:
+      return enable_flags.scissor_test;
+    case GL_STENCIL_TEST:
+      return enable_flags.stencil_test;
+    default:
+      GPU_NOTREACHED();
+      return false;
+  }
+}
+
+bool ContextState::GetStateAsGLint(
+    GLenum pname, GLint* params, GLsizei* num_written) const {
+  switch (pname) {
+    case GL_VIEWPORT:
+      *num_written = 4;
+      if (params) {
+        params[0] = static_cast<GLint>(viewport_x);
+        params[1] = static_cast<GLint>(viewport_y);
+        params[2] = static_cast<GLint>(viewport_width);
+        params[3] = static_cast<GLint>(viewport_height);
+      }
+      return true;
+    case GL_BLEND_SRC_RGB:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(blend_source_rgb);
+      }
+      return true;
+    case GL_BLEND_DST_RGB:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(blend_dest_rgb);
+      }
+      return true;
+    case GL_BLEND_SRC_ALPHA:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(blend_source_alpha);
+      }
+      return true;
+    case GL_BLEND_DST_ALPHA:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(blend_dest_alpha);
+      }
+      return true;
+    case GL_LINE_WIDTH:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(line_width);
+      }
+      return true;
+    case GL_BLEND_COLOR:
+      *num_written = 4;
+      if (params) {
+        params[0] = static_cast<GLint>(blend_color_red);
+        params[1] = static_cast<GLint>(blend_color_green);
+        params[2] = static_cast<GLint>(blend_color_blue);
+        params[3] = static_cast<GLint>(blend_color_alpha);
+      }
+      return true;
+    case GL_STENCIL_CLEAR_VALUE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(stencil_clear);
+      }
+      return true;
+    case GL_COLOR_WRITEMASK:
+      *num_written = 4;
+      if (params) {
+        params[0] = static_cast<GLint>(color_mask_red);
+        params[1] = static_cast<GLint>(color_mask_green);
+        params[2] = static_cast<GLint>(color_mask_blue);
+        params[3] = static_cast<GLint>(color_mask_alpha);
+      }
+      return true;
+    case GL_COLOR_CLEAR_VALUE:
+      *num_written = 4;
+      if (params) {
+        params[0] = static_cast<GLint>(color_clear_red);
+        params[1] = static_cast<GLint>(color_clear_green);
+        params[2] = static_cast<GLint>(color_clear_blue);
+        params[3] = static_cast<GLint>(color_clear_alpha);
+      }
+      return true;
+    case GL_DEPTH_RANGE:
+      *num_written = 2;
+      if (params) {
+        params[0] = static_cast<GLint>(z_near);
+        params[1] = static_cast<GLint>(z_far);
+      }
+      return true;
+    case GL_DEPTH_CLEAR_VALUE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(depth_clear);
+      }
+      return true;
+    case GL_STENCIL_FAIL:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(stencil_front_fail_op);
+      }
+      return true;
+    case GL_STENCIL_PASS_DEPTH_FAIL:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(stencil_front_z_fail_op);
+      }
+      return true;
+    case GL_STENCIL_PASS_DEPTH_PASS:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(stencil_front_z_pass_op);
+      }
+      return true;
+    case GL_STENCIL_BACK_FAIL:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(stencil_back_fail_op);
+      }
+      return true;
+    case GL_STENCIL_BACK_PASS_DEPTH_FAIL:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(stencil_back_z_fail_op);
+      }
+      return true;
+    case GL_STENCIL_BACK_PASS_DEPTH_PASS:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(stencil_back_z_pass_op);
+      }
+      return true;
+    case GL_SCISSOR_BOX:
+      *num_written = 4;
+      if (params) {
+        params[0] = static_cast<GLint>(scissor_x);
+        params[1] = static_cast<GLint>(scissor_y);
+        params[2] = static_cast<GLint>(scissor_width);
+        params[3] = static_cast<GLint>(scissor_height);
+      }
+      return true;
+    case GL_FRONT_FACE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(front_face);
+      }
+      return true;
+    case GL_SAMPLE_COVERAGE_VALUE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(sample_coverage_value);
+      }
+      return true;
+    case GL_SAMPLE_COVERAGE_INVERT:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(sample_coverage_invert);
+      }
+      return true;
+    case GL_POLYGON_OFFSET_FACTOR:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(polygon_offset_factor);
+      }
+      return true;
+    case GL_POLYGON_OFFSET_UNITS:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(polygon_offset_units);
+      }
+      return true;
+    case GL_CULL_FACE_MODE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(cull_mode);
+      }
+      return true;
+    case GL_DEPTH_FUNC:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(depth_func);
+      }
+      return true;
+    case GL_STENCIL_FUNC:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(stencil_front_func);
+      }
+      return true;
+    case GL_STENCIL_REF:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(stencil_front_ref);
+      }
+      return true;
+    case GL_STENCIL_VALUE_MASK:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(stencil_front_mask);
+      }
+      return true;
+    case GL_STENCIL_BACK_FUNC:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(stencil_back_func);
+      }
+      return true;
+    case GL_STENCIL_BACK_REF:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(stencil_back_ref);
+      }
+      return true;
+    case GL_STENCIL_BACK_VALUE_MASK:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(stencil_back_mask);
+      }
+      return true;
+    case GL_DEPTH_WRITEMASK:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(depth_mask);
+      }
+      return true;
+    case GL_BLEND_EQUATION_RGB:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(blend_equation_rgb);
+      }
+      return true;
+    case GL_BLEND_EQUATION_ALPHA:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(blend_equation_alpha);
+      }
+      return true;
+    case GL_STENCIL_WRITEMASK:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(stencil_front_writemask);
+      }
+      return true;
+    case GL_STENCIL_BACK_WRITEMASK:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(stencil_back_writemask);
+      }
+      return true;
+    case GL_BLEND:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(enable_flags.blend);
+      }
+      return true;
+    case GL_CULL_FACE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(enable_flags.cull_face);
+      }
+      return true;
+    case GL_DEPTH_TEST:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(enable_flags.depth_test);
+      }
+      return true;
+    case GL_DITHER:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(enable_flags.dither);
+      }
+      return true;
+    case GL_POLYGON_OFFSET_FILL:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(enable_flags.polygon_offset_fill);
+      }
+      return true;
+    case GL_SAMPLE_ALPHA_TO_COVERAGE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(enable_flags.sample_alpha_to_coverage);
+      }
+      return true;
+    case GL_SAMPLE_COVERAGE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(enable_flags.sample_coverage);
+      }
+      return true;
+    case GL_SCISSOR_TEST:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(enable_flags.scissor_test);
+      }
+      return true;
+    case GL_STENCIL_TEST:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(enable_flags.stencil_test);
+      }
+      return true;
+    default:
+      return false;
+  }
+}
+
+bool ContextState::GetStateAsGLfloat(
+    GLenum pname, GLfloat* params, GLsizei* num_written) const {
+  switch (pname) {
+    case GL_VIEWPORT:
+      *num_written = 4;
+      if (params) {
+        params[0] = static_cast<GLfloat>(viewport_x);
+        params[1] = static_cast<GLfloat>(viewport_y);
+        params[2] = static_cast<GLfloat>(viewport_width);
+        params[3] = static_cast<GLfloat>(viewport_height);
+      }
+      return true;
+    case GL_BLEND_SRC_RGB:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(blend_source_rgb);
+      }
+      return true;
+    case GL_BLEND_DST_RGB:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(blend_dest_rgb);
+      }
+      return true;
+    case GL_BLEND_SRC_ALPHA:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(blend_source_alpha);
+      }
+      return true;
+    case GL_BLEND_DST_ALPHA:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(blend_dest_alpha);
+      }
+      return true;
+    case GL_LINE_WIDTH:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(line_width);
+      }
+      return true;
+    case GL_BLEND_COLOR:
+      *num_written = 4;
+      if (params) {
+        params[0] = static_cast<GLfloat>(blend_color_red);
+        params[1] = static_cast<GLfloat>(blend_color_green);
+        params[2] = static_cast<GLfloat>(blend_color_blue);
+        params[3] = static_cast<GLfloat>(blend_color_alpha);
+      }
+      return true;
+    case GL_STENCIL_CLEAR_VALUE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(stencil_clear);
+      }
+      return true;
+    case GL_COLOR_WRITEMASK:
+      *num_written = 4;
+      if (params) {
+        params[0] = static_cast<GLfloat>(color_mask_red);
+        params[1] = static_cast<GLfloat>(color_mask_green);
+        params[2] = static_cast<GLfloat>(color_mask_blue);
+        params[3] = static_cast<GLfloat>(color_mask_alpha);
+      }
+      return true;
+    case GL_COLOR_CLEAR_VALUE:
+      *num_written = 4;
+      if (params) {
+        params[0] = static_cast<GLfloat>(color_clear_red);
+        params[1] = static_cast<GLfloat>(color_clear_green);
+        params[2] = static_cast<GLfloat>(color_clear_blue);
+        params[3] = static_cast<GLfloat>(color_clear_alpha);
+      }
+      return true;
+    case GL_DEPTH_RANGE:
+      *num_written = 2;
+      if (params) {
+        params[0] = static_cast<GLfloat>(z_near);
+        params[1] = static_cast<GLfloat>(z_far);
+      }
+      return true;
+    case GL_DEPTH_CLEAR_VALUE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(depth_clear);
+      }
+      return true;
+    case GL_STENCIL_FAIL:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(stencil_front_fail_op);
+      }
+      return true;
+    case GL_STENCIL_PASS_DEPTH_FAIL:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(stencil_front_z_fail_op);
+      }
+      return true;
+    case GL_STENCIL_PASS_DEPTH_PASS:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(stencil_front_z_pass_op);
+      }
+      return true;
+    case GL_STENCIL_BACK_FAIL:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(stencil_back_fail_op);
+      }
+      return true;
+    case GL_STENCIL_BACK_PASS_DEPTH_FAIL:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(stencil_back_z_fail_op);
+      }
+      return true;
+    case GL_STENCIL_BACK_PASS_DEPTH_PASS:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(stencil_back_z_pass_op);
+      }
+      return true;
+    case GL_SCISSOR_BOX:
+      *num_written = 4;
+      if (params) {
+        params[0] = static_cast<GLfloat>(scissor_x);
+        params[1] = static_cast<GLfloat>(scissor_y);
+        params[2] = static_cast<GLfloat>(scissor_width);
+        params[3] = static_cast<GLfloat>(scissor_height);
+      }
+      return true;
+    case GL_FRONT_FACE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(front_face);
+      }
+      return true;
+    case GL_SAMPLE_COVERAGE_VALUE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(sample_coverage_value);
+      }
+      return true;
+    case GL_SAMPLE_COVERAGE_INVERT:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(sample_coverage_invert);
+      }
+      return true;
+    case GL_POLYGON_OFFSET_FACTOR:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(polygon_offset_factor);
+      }
+      return true;
+    case GL_POLYGON_OFFSET_UNITS:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(polygon_offset_units);
+      }
+      return true;
+    case GL_CULL_FACE_MODE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(cull_mode);
+      }
+      return true;
+    case GL_DEPTH_FUNC:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(depth_func);
+      }
+      return true;
+    case GL_STENCIL_FUNC:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(stencil_front_func);
+      }
+      return true;
+    case GL_STENCIL_REF:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(stencil_front_ref);
+      }
+      return true;
+    case GL_STENCIL_VALUE_MASK:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(stencil_front_mask);
+      }
+      return true;
+    case GL_STENCIL_BACK_FUNC:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(stencil_back_func);
+      }
+      return true;
+    case GL_STENCIL_BACK_REF:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(stencil_back_ref);
+      }
+      return true;
+    case GL_STENCIL_BACK_VALUE_MASK:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(stencil_back_mask);
+      }
+      return true;
+    case GL_DEPTH_WRITEMASK:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(depth_mask);
+      }
+      return true;
+    case GL_BLEND_EQUATION_RGB:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(blend_equation_rgb);
+      }
+      return true;
+    case GL_BLEND_EQUATION_ALPHA:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(blend_equation_alpha);
+      }
+      return true;
+    case GL_STENCIL_WRITEMASK:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(stencil_front_writemask);
+      }
+      return true;
+    case GL_STENCIL_BACK_WRITEMASK:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(stencil_back_writemask);
+      }
+      return true;
+    case GL_BLEND:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(enable_flags.blend);
+      }
+      return true;
+    case GL_CULL_FACE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(enable_flags.cull_face);
+      }
+      return true;
+    case GL_DEPTH_TEST:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(enable_flags.depth_test);
+      }
+      return true;
+    case GL_DITHER:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(enable_flags.dither);
+      }
+      return true;
+    case GL_POLYGON_OFFSET_FILL:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(enable_flags.polygon_offset_fill);
+      }
+      return true;
+    case GL_SAMPLE_ALPHA_TO_COVERAGE:
+      *num_written = 1;
+      if (params) {
+        params[0] =
+            static_cast<GLfloat>(enable_flags.sample_alpha_to_coverage);
+      }
+      return true;
+    case GL_SAMPLE_COVERAGE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(enable_flags.sample_coverage);
+      }
+      return true;
+    case GL_SCISSOR_TEST:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(enable_flags.scissor_test);
+      }
+      return true;
+    case GL_STENCIL_TEST:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(enable_flags.stencil_test);
+      }
+      return true;
+    default:
+      return false;
+  }
+}
 #endif  // GPU_COMMAND_BUFFER_SERVICE_CONTEXT_STATE_IMPL_AUTOGEN_H_
 
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 772d6d4..535918d 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -982,9 +982,6 @@ class GLES2DecoderImpl : public base::SupportsWeakPtr<GLES2DecoderImpl>,
 
   // Helper for glGetBooleanv, glGetFloatv and glGetIntegerv
   bool GetHelper(GLenum pname, GLint* params, GLsizei* num_written);
-  // Same as GetHelper except for auto-generated state.
-  bool GetStateAsGLint(GLenum pname, GLint* params, GLsizei* num_written);
-  bool GetStateAsGLfloat(GLenum pname, GLfloat* params, GLsizei* num_written);
 
   // Wrapper for glCreateProgram
   bool CreateProgramHelper(GLuint client_id);
@@ -3880,7 +3877,7 @@ bool GLES2DecoderImpl::GetHelper(
 
 bool GLES2DecoderImpl::GetNumValuesReturnedForGLGet(
     GLenum pname, GLsizei* num_values) {
-  if (GetStateAsGLint(pname, NULL, num_values)) {
+  if (state_.GetStateAsGLint(pname, NULL, num_values)) {
     return true;
   }
   return GetHelper(pname, NULL, num_values);
@@ -3891,7 +3888,7 @@ void GLES2DecoderImpl::DoGetBooleanv(GLenum pname, GLboolean* params) {
   GLsizei num_written = 0;
   if (GetNumValuesReturnedForGLGet(pname, &num_written)) {
     scoped_array<GLint> values(new GLint[num_written]);
-    if (!GetStateAsGLint(pname, values.get(), &num_written)) {
+    if (!state_.GetStateAsGLint(pname, values.get(), &num_written)) {
       GetHelper(pname, values.get(), &num_written);
     }
     for (GLsizei ii = 0; ii < num_written; ++ii) {
@@ -3905,7 +3902,7 @@ void GLES2DecoderImpl::DoGetBooleanv(GLenum pname, GLboolean* params) {
 void GLES2DecoderImpl::DoGetFloatv(GLenum pname, GLfloat* params) {
   DCHECK(params);
   GLsizei num_written = 0;
-  if (!GetStateAsGLfloat(pname, params, &num_written)) {
+  if (!state_.GetStateAsGLfloat(pname, params, &num_written)) {
     if (GetHelper(pname, NULL, &num_written)) {
       scoped_array<GLint> values(new GLint[num_written]);
       GetHelper(pname, values.get(), &num_written);
@@ -3921,7 +3918,7 @@ void GLES2DecoderImpl::DoGetFloatv(GLenum pname, GLfloat* params) {
 void GLES2DecoderImpl::DoGetIntegerv(GLenum pname, GLint* params) {
   DCHECK(params);
   GLsizei num_written;
-  if (!GetStateAsGLint(pname, params, &num_written) &&
+  if (!state_.GetStateAsGLint(pname, params, &num_written) &&
       !GetHelper(pname, params, &num_written)) {
     glGetIntegerv(pname, params);
   }
@@ -5857,6 +5854,10 @@ error::Error GLES2DecoderImpl::HandleGetShaderInfoLog(
   return error::kNoError;
 }
 
+bool GLES2DecoderImpl::DoIsEnabled(GLenum cap) {
+  return state_.GetEnabled(cap);
+}
+
 bool GLES2DecoderImpl::DoIsBuffer(GLuint client_id) {
   const BufferManager::BufferInfo* buffer = GetBufferInfo(client_id);
   return buffer && buffer->IsValid() && !buffer->IsDeleted();
@@ -8422,7 +8423,7 @@ error::Error GLES2DecoderImpl::HandleGetMultipleIntegervCHROMIUM(
   GLint* start = results;
   for (GLuint ii = 0; ii < count; ++ii) {
     GLsizei num_written = 0;
-    if (!GetStateAsGLint(enums[ii], results, &num_written) &&
+    if (!state_.GetStateAsGLint(enums[ii], results, &num_written) &&
         !GetHelper(enums[ii], results, &num_written)) {
       glGetIntegerv(enums[ii], results);
     }
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h b/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
index 9512a79..4a8d2a7 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
@@ -79,11 +79,16 @@ error::Error GLES2DecoderImpl::HandleBlendColor(
   GLclampf green = static_cast<GLclampf>(c.green);
   GLclampf blue = static_cast<GLclampf>(c.blue);
   GLclampf alpha = static_cast<GLclampf>(c.alpha);
-  state_.blend_color_red = red;
-  state_.blend_color_green = green;
-  state_.blend_color_blue = blue;
-  state_.blend_color_alpha = alpha;
-  glBlendColor(red, green, blue, alpha);
+  if (state_.blend_color_red != red ||
+      state_.blend_color_green != green ||
+      state_.blend_color_blue != blue ||
+      state_.blend_color_alpha != alpha) {
+    state_.blend_color_red = red;
+    state_.blend_color_green = green;
+    state_.blend_color_blue = blue;
+    state_.blend_color_alpha = alpha;
+    glBlendColor(red, green, blue, alpha);
+  }
   return error::kNoError;
 }
 
@@ -94,9 +99,12 @@ error::Error GLES2DecoderImpl::HandleBlendEquation(
     SetGLErrorInvalidEnum("glBlendEquation", mode, "mode");
     return error::kNoError;
   }
-  state_.blend_equation_rgb = mode;
-  state_.blend_equation_alpha = mode;
-  glBlendEquation(mode);
+  if (state_.blend_equation_rgb != mode ||
+      state_.blend_equation_alpha != mode) {
+    state_.blend_equation_rgb = mode;
+    state_.blend_equation_alpha = mode;
+    glBlendEquation(mode);
+  }
   return error::kNoError;
 }
 
@@ -112,9 +120,12 @@ error::Error GLES2DecoderImpl::HandleBlendEquationSeparate(
     SetGLErrorInvalidEnum("glBlendEquationSeparate", modeAlpha, "modeAlpha");
     return error::kNoError;
   }
-  state_.blend_equation_rgb = modeRGB;
-  state_.blend_equation_alpha = modeAlpha;
-  glBlendEquationSeparate(modeRGB, modeAlpha);
+  if (state_.blend_equation_rgb != modeRGB ||
+      state_.blend_equation_alpha != modeAlpha) {
+    state_.blend_equation_rgb = modeRGB;
+    state_.blend_equation_alpha = modeAlpha;
+    glBlendEquationSeparate(modeRGB, modeAlpha);
+  }
   return error::kNoError;
 }
 
@@ -130,11 +141,16 @@ error::Error GLES2DecoderImpl::HandleBlendFunc(
     SetGLErrorInvalidEnum("glBlendFunc", dfactor, "dfactor");
     return error::kNoError;
   }
-  state_.blend_source_rgb = sfactor;
-  state_.blend_dest_rgb = dfactor;
-  state_.blend_source_alpha = sfactor;
-  state_.blend_dest_alpha = dfactor;
-  glBlendFunc(sfactor, dfactor);
+  if (state_.blend_source_rgb != sfactor ||
+      state_.blend_dest_rgb != dfactor ||
+      state_.blend_source_alpha != sfactor ||
+      state_.blend_dest_alpha != dfactor) {
+    state_.blend_source_rgb = sfactor;
+    state_.blend_dest_rgb = dfactor;
+    state_.blend_source_alpha = sfactor;
+    state_.blend_dest_alpha = dfactor;
+    glBlendFunc(sfactor, dfactor);
+  }
   return error::kNoError;
 }
 
@@ -160,11 +176,16 @@ error::Error GLES2DecoderImpl::HandleBlendFuncSeparate(
     SetGLErrorInvalidEnum("glBlendFuncSeparate", dstAlpha, "dstAlpha");
     return error::kNoError;
   }
-  state_.blend_source_rgb = srcRGB;
-  state_.blend_dest_rgb = dstRGB;
-  state_.blend_source_alpha = srcAlpha;
-  state_.blend_dest_alpha = dstAlpha;
-  glBlendFuncSeparate(srcRGB, dstRGB, srcAlpha, dstAlpha);
+  if (state_.blend_source_rgb != srcRGB ||
+      state_.blend_dest_rgb != dstRGB ||
+      state_.blend_source_alpha != srcAlpha ||
+      state_.blend_dest_alpha != dstAlpha) {
+    state_.blend_source_rgb = srcRGB;
+    state_.blend_dest_rgb = dstRGB;
+    state_.blend_source_alpha = srcAlpha;
+    state_.blend_dest_alpha = dstAlpha;
+    glBlendFuncSeparate(srcRGB, dstRGB, srcAlpha, dstAlpha);
+  }
   return error::kNoError;
 }
 
@@ -237,27 +258,36 @@ error::Error GLES2DecoderImpl::HandleClearColor(
   GLclampf green = static_cast<GLclampf>(c.green);
   GLclampf blue = static_cast<GLclampf>(c.blue);
   GLclampf alpha = static_cast<GLclampf>(c.alpha);
-  state_.color_clear_red = red;
-  state_.color_clear_green = green;
-  state_.color_clear_blue = blue;
-  state_.color_clear_alpha = alpha;
-  glClearColor(red, green, blue, alpha);
+  if (state_.color_clear_red != red ||
+      state_.color_clear_green != green ||
+      state_.color_clear_blue != blue ||
+      state_.color_clear_alpha != alpha) {
+    state_.color_clear_red = red;
+    state_.color_clear_green = green;
+    state_.color_clear_blue = blue;
+    state_.color_clear_alpha = alpha;
+    glClearColor(red, green, blue, alpha);
+  }
   return error::kNoError;
 }
 
 error::Error GLES2DecoderImpl::HandleClearDepthf(
     uint32 immediate_data_size, const gles2::ClearDepthf& c) {
   GLclampf depth = static_cast<GLclampf>(c.depth);
-  state_.depth_clear = depth;
-  glClearDepth(depth);
+  if (state_.depth_clear != depth) {
+    state_.depth_clear = depth;
+    glClearDepth(depth);
+  }
   return error::kNoError;
 }
 
 error::Error GLES2DecoderImpl::HandleClearStencil(
     uint32 immediate_data_size, const gles2::ClearStencil& c) {
   GLint s = static_cast<GLint>(c.s);
-  state_.stencil_clear = s;
-  glClearStencil(s);
+  if (state_.stencil_clear != s) {
+    state_.stencil_clear = s;
+    glClearStencil(s);
+  }
   return error::kNoError;
 }
 
@@ -267,11 +297,16 @@ error::Error GLES2DecoderImpl::HandleColorMask(
   GLboolean green = static_cast<GLboolean>(c.green);
   GLboolean blue = static_cast<GLboolean>(c.blue);
   GLboolean alpha = static_cast<GLboolean>(c.alpha);
-  state_.color_mask_red = red;
-  state_.color_mask_green = green;
-  state_.color_mask_blue = blue;
-  state_.color_mask_alpha = alpha;
-  clear_state_dirty_ = true;
+  if (state_.color_mask_red != red ||
+      state_.color_mask_green != green ||
+      state_.color_mask_blue != blue ||
+      state_.color_mask_alpha != alpha) {
+    state_.color_mask_red = red;
+    state_.color_mask_green = green;
+    state_.color_mask_blue = blue;
+    state_.color_mask_alpha = alpha;
+    clear_state_dirty_ = true;
+  }
   return error::kNoError;
 }
 
@@ -457,8 +492,10 @@ error::Error GLES2DecoderImpl::HandleCullFace(
     SetGLErrorInvalidEnum("glCullFace", mode, "mode");
     return error::kNoError;
   }
-  state_.cull_mode = mode;
-  glCullFace(mode);
+  if (state_.cull_mode != mode) {
+    state_.cull_mode = mode;
+    glCullFace(mode);
+  }
   return error::kNoError;
 }
 
@@ -597,16 +634,20 @@ error::Error GLES2DecoderImpl::HandleDepthFunc(
     SetGLErrorInvalidEnum("glDepthFunc", func, "func");
     return error::kNoError;
   }
-  state_.depth_func = func;
-  glDepthFunc(func);
+  if (state_.depth_func != func) {
+    state_.depth_func = func;
+    glDepthFunc(func);
+  }
   return error::kNoError;
 }
 
 error::Error GLES2DecoderImpl::HandleDepthMask(
     uint32 immediate_data_size, const gles2::DepthMask& c) {
   GLboolean flag = static_cast<GLboolean>(c.flag);
-  state_.depth_mask = flag;
-  clear_state_dirty_ = true;
+  if (state_.depth_mask != flag) {
+    state_.depth_mask = flag;
+    clear_state_dirty_ = true;
+  }
   return error::kNoError;
 }
 
@@ -734,8 +775,10 @@ error::Error GLES2DecoderImpl::HandleFrontFace(
     SetGLErrorInvalidEnum("glFrontFace", mode, "mode");
     return error::kNoError;
   }
-  state_.front_face = mode;
-  glFrontFace(mode);
+  if (state_.front_face != mode) {
+    state_.front_face = mode;
+    glFrontFace(mode);
+  }
   return error::kNoError;
 }
 
@@ -1430,8 +1473,10 @@ error::Error GLES2DecoderImpl::HandleIsTexture(
 error::Error GLES2DecoderImpl::HandleLineWidth(
     uint32 immediate_data_size, const gles2::LineWidth& c) {
   GLfloat width = static_cast<GLfloat>(c.width);
-  state_.line_width = width;
-  glLineWidth(width);
+  if (state_.line_width != width) {
+    state_.line_width = width;
+    glLineWidth(width);
+  }
   return error::kNoError;
 }
 
@@ -1446,9 +1491,12 @@ error::Error GLES2DecoderImpl::HandlePolygonOffset(
     uint32 immediate_data_size, const gles2::PolygonOffset& c) {
   GLfloat factor = static_cast<GLfloat>(c.factor);
   GLfloat units = static_cast<GLfloat>(c.units);
-  state_.polygon_offset_factor = factor;
-  state_.polygon_offset_units = units;
-  glPolygonOffset(factor, units);
+  if (state_.polygon_offset_factor != factor ||
+      state_.polygon_offset_units != units) {
+    state_.polygon_offset_factor = factor;
+    state_.polygon_offset_units = units;
+    glPolygonOffset(factor, units);
+  }
   return error::kNoError;
 }
 
@@ -1507,11 +1555,16 @@ error::Error GLES2DecoderImpl::HandleScissor(
     SetGLError(GL_INVALID_VALUE, "glScissor", "height < 0");
     return error::kNoError;
   }
-  state_.scissor_x = x;
-  state_.scissor_y = y;
-  state_.scissor_width = width;
-  state_.scissor_height = height;
-  glScissor(x, y, width, height);
+  if (state_.scissor_x != x ||
+      state_.scissor_y != y ||
+      state_.scissor_width != width ||
+      state_.scissor_height != height) {
+    state_.scissor_x = x;
+    state_.scissor_y = y;
+    state_.scissor_width = width;
+    state_.scissor_height = height;
+    glScissor(x, y, width, height);
+  }
   return error::kNoError;
 }
 
@@ -1524,7 +1577,20 @@ error::Error GLES2DecoderImpl::HandleStencilFunc(
     SetGLErrorInvalidEnum("glStencilFunc", func, "func");
     return error::kNoError;
   }
-  glStencilFunc(func, ref, mask);
+  if (state_.stencil_front_func != func ||
+      state_.stencil_front_ref != ref ||
+      state_.stencil_front_mask != mask ||
+      state_.stencil_back_func != func ||
+      state_.stencil_back_ref != ref ||
+      state_.stencil_back_mask != mask) {
+    state_.stencil_front_func = func;
+    state_.stencil_front_ref = ref;
+    state_.stencil_front_mask = mask;
+    state_.stencil_back_func = func;
+    state_.stencil_back_ref = ref;
+    state_.stencil_back_mask = mask;
+    glStencilFunc(func, ref, mask);
+  }
   return error::kNoError;
 }
 
@@ -1542,16 +1608,42 @@ error::Error GLES2DecoderImpl::HandleStencilFuncSeparate(
     SetGLErrorInvalidEnum("glStencilFuncSeparate", func, "func");
     return error::kNoError;
   }
-  glStencilFuncSeparate(face, func, ref, mask);
+  bool changed = false;
+  if (face == GL_FRONT || face == GL_FRONT_AND_BACK) {
+    changed |= state_.stencil_front_func != func ||
+        state_.stencil_front_ref != ref ||
+        state_.stencil_front_mask != mask;
+  }
+  if (face == GL_BACK || face == GL_FRONT_AND_BACK) {
+    changed |= state_.stencil_back_func != func ||
+        state_.stencil_back_ref != ref ||
+        state_.stencil_back_mask != mask;
+  }
+  if (changed) {
+    if (face == GL_FRONT || face == GL_FRONT_AND_BACK) {
+      state_.stencil_front_func = func;
+      state_.stencil_front_ref = ref;
+      state_.stencil_front_mask = mask;
+    }
+    if (face == GL_BACK || face == GL_FRONT_AND_BACK) {
+      state_.stencil_back_func = func;
+      state_.stencil_back_ref = ref;
+      state_.stencil_back_mask = mask;
+    }
+    glStencilFuncSeparate(face, func, ref, mask);
+  }
   return error::kNoError;
 }
 
 error::Error GLES2DecoderImpl::HandleStencilMask(
     uint32 immediate_data_size, const gles2::StencilMask& c) {
   GLuint mask = static_cast<GLuint>(c.mask);
-  state_.stencil_front_writemask = mask;
-  state_.stencil_back_writemask = mask;
-  clear_state_dirty_ = true;
+  if (state_.stencil_front_writemask != mask ||
+      state_.stencil_back_writemask != mask) {
+    state_.stencil_front_writemask = mask;
+    state_.stencil_back_writemask = mask;
+    clear_state_dirty_ = true;
+  }
   return error::kNoError;
 }
 
@@ -1563,13 +1655,22 @@ error::Error GLES2DecoderImpl::HandleStencilMaskSeparate(
     SetGLErrorInvalidEnum("glStencilMaskSeparate", face, "face");
     return error::kNoError;
   }
+  bool changed = false;
   if (face == GL_FRONT || face == GL_FRONT_AND_BACK) {
-    state_.stencil_front_writemask = mask;
+    changed |= state_.stencil_front_writemask != mask;
   }
   if (face == GL_BACK || face == GL_FRONT_AND_BACK) {
-    state_.stencil_back_writemask = mask;
+    changed |= state_.stencil_back_writemask != mask;
+  }
+  if (changed) {
+    if (face == GL_FRONT || face == GL_FRONT_AND_BACK) {
+      state_.stencil_front_writemask = mask;
+    }
+    if (face == GL_BACK || face == GL_FRONT_AND_BACK) {
+      state_.stencil_back_writemask = mask;
+    }
+    clear_state_dirty_ = true;
   }
-  clear_state_dirty_ = true;
   return error::kNoError;
 }
 
@@ -1590,13 +1691,20 @@ error::Error GLES2DecoderImpl::HandleStencilOp(
     SetGLErrorInvalidEnum("glStencilOp", zpass, "zpass");
     return error::kNoError;
   }
-  state_.stencil_front_fail_op = fail;
-  state_.stencil_front_z_fail_op = zfail;
-  state_.stencil_front_z_pass_op = zpass;
-  state_.stencil_back_fail_op = fail;
-  state_.stencil_back_z_fail_op = zfail;
-  state_.stencil_back_z_pass_op = zpass;
-  glStencilOp(fail, zfail, zpass);
+  if (state_.stencil_front_fail_op != fail ||
+      state_.stencil_front_z_fail_op != zfail ||
+      state_.stencil_front_z_pass_op != zpass ||
+      state_.stencil_back_fail_op != fail ||
+      state_.stencil_back_z_fail_op != zfail ||
+      state_.stencil_back_z_pass_op != zpass) {
+    state_.stencil_front_fail_op = fail;
+    state_.stencil_front_z_fail_op = zfail;
+    state_.stencil_front_z_pass_op = zpass;
+    state_.stencil_back_fail_op = fail;
+    state_.stencil_back_z_fail_op = zfail;
+    state_.stencil_back_z_pass_op = zpass;
+    glStencilOp(fail, zfail, zpass);
+  }
   return error::kNoError;
 }
 
@@ -1622,17 +1730,30 @@ error::Error GLES2DecoderImpl::HandleStencilOpSeparate(
     SetGLErrorInvalidEnum("glStencilOpSeparate", zpass, "zpass");
     return error::kNoError;
   }
+  bool changed = false;
   if (face == GL_FRONT || face == GL_FRONT_AND_BACK) {
-    state_.stencil_front_fail_op = fail;
-    state_.stencil_front_z_fail_op = zfail;
-    state_.stencil_front_z_pass_op = zpass;
+    changed |= state_.stencil_front_fail_op != fail ||
+        state_.stencil_front_z_fail_op != zfail ||
+        state_.stencil_front_z_pass_op != zpass;
   }
   if (face == GL_BACK || face == GL_FRONT_AND_BACK) {
-    state_.stencil_back_fail_op = fail;
-    state_.stencil_back_z_fail_op = zfail;
-    state_.stencil_back_z_pass_op = zpass;
+    changed |= state_.stencil_back_fail_op != fail ||
+        state_.stencil_back_z_fail_op != zfail ||
+        state_.stencil_back_z_pass_op != zpass;
+  }
+  if (changed) {
+    if (face == GL_FRONT || face == GL_FRONT_AND_BACK) {
+      state_.stencil_front_fail_op = fail;
+      state_.stencil_front_z_fail_op = zfail;
+      state_.stencil_front_z_pass_op = zpass;
+    }
+    if (face == GL_BACK || face == GL_FRONT_AND_BACK) {
+      state_.stencil_back_fail_op = fail;
+      state_.stencil_back_z_fail_op = zfail;
+      state_.stencil_back_z_pass_op = zpass;
+    }
+    glStencilOpSeparate(face, fail, zfail, zpass);
   }
-  glStencilOpSeparate(face, fail, zfail, zpass);
   return error::kNoError;
 }
 
@@ -3000,8 +3121,11 @@ bool GLES2DecoderImpl::SetCapabilityState(GLenum cap, bool enabled) {
       state_.enable_flags.sample_coverage = enabled;
       return true;
     case GL_SCISSOR_TEST:
-      state_.enable_flags.scissor_test = enabled;
-      return true;
+      if (state_.enable_flags.scissor_test != enabled) {
+        state_.enable_flags.scissor_test = enabled;
+        clear_state_dirty_ = true;
+      }
+      return false;
     case GL_STENCIL_TEST:
       if (state_.enable_flags.stencil_test != enabled) {
         state_.enable_flags.stencil_test = enabled;
@@ -3013,635 +3137,5 @@ bool GLES2DecoderImpl::SetCapabilityState(GLenum cap, bool enabled) {
       return false;
   }
 }
-
-bool GLES2DecoderImpl::DoIsEnabled(GLenum cap) {
-  switch (cap) {
-    case GL_BLEND:
-      return state_.enable_flags.blend;
-    case GL_CULL_FACE:
-      return state_.enable_flags.cull_face;
-    case GL_DEPTH_TEST:
-      return state_.enable_flags.depth_test;
-    case GL_DITHER:
-      return state_.enable_flags.dither;
-    case GL_POLYGON_OFFSET_FILL:
-      return state_.enable_flags.polygon_offset_fill;
-    case GL_SAMPLE_ALPHA_TO_COVERAGE:
-      return state_.enable_flags.sample_alpha_to_coverage;
-    case GL_SAMPLE_COVERAGE:
-      return state_.enable_flags.sample_coverage;
-    case GL_SCISSOR_TEST:
-      return state_.enable_flags.scissor_test;
-    case GL_STENCIL_TEST:
-      return state_.enable_flags.stencil_test;
-    default:
-      NOTREACHED();
-      return false;
-  }
-}
-
-bool GLES2DecoderImpl::GetStateAsGLint(
-    GLenum pname, GLint* params, GLsizei* num_written) {
-  switch (pname) {
-    case GL_VIEWPORT:
-      *num_written = 4;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.viewport_x);
-        params[1] = static_cast<GLint>(state_.viewport_y);
-        params[2] = static_cast<GLint>(state_.viewport_width);
-        params[3] = static_cast<GLint>(state_.viewport_height);
-      }
-      return true;
-    case GL_BLEND_SRC_RGB:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.blend_source_rgb);
-      }
-      return true;
-    case GL_BLEND_DST_RGB:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.blend_dest_rgb);
-      }
-      return true;
-    case GL_BLEND_SRC_ALPHA:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.blend_source_alpha);
-      }
-      return true;
-    case GL_BLEND_DST_ALPHA:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.blend_dest_alpha);
-      }
-      return true;
-    case GL_LINE_WIDTH:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.line_width);
-      }
-      return true;
-    case GL_BLEND_COLOR:
-      *num_written = 4;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.blend_color_red);
-        params[1] = static_cast<GLint>(state_.blend_color_green);
-        params[2] = static_cast<GLint>(state_.blend_color_blue);
-        params[3] = static_cast<GLint>(state_.blend_color_alpha);
-      }
-      return true;
-    case GL_STENCIL_CLEAR_VALUE:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.stencil_clear);
-      }
-      return true;
-    case GL_COLOR_WRITEMASK:
-      *num_written = 4;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.color_mask_red);
-        params[1] = static_cast<GLint>(state_.color_mask_green);
-        params[2] = static_cast<GLint>(state_.color_mask_blue);
-        params[3] = static_cast<GLint>(state_.color_mask_alpha);
-      }
-      return true;
-    case GL_COLOR_CLEAR_VALUE:
-      *num_written = 4;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.color_clear_red);
-        params[1] = static_cast<GLint>(state_.color_clear_green);
-        params[2] = static_cast<GLint>(state_.color_clear_blue);
-        params[3] = static_cast<GLint>(state_.color_clear_alpha);
-      }
-      return true;
-    case GL_DEPTH_RANGE:
-      *num_written = 2;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.z_near);
-        params[1] = static_cast<GLint>(state_.z_far);
-      }
-      return true;
-    case GL_DEPTH_CLEAR_VALUE:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.depth_clear);
-      }
-      return true;
-    case GL_STENCIL_FAIL:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.stencil_front_fail_op);
-      }
-      return true;
-    case GL_STENCIL_PASS_DEPTH_FAIL:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.stencil_front_z_fail_op);
-      }
-      return true;
-    case GL_STENCIL_PASS_DEPTH_PASS:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.stencil_front_z_pass_op);
-      }
-      return true;
-    case GL_STENCIL_BACK_FAIL:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.stencil_back_fail_op);
-      }
-      return true;
-    case GL_STENCIL_BACK_PASS_DEPTH_FAIL:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.stencil_back_z_fail_op);
-      }
-      return true;
-    case GL_STENCIL_BACK_PASS_DEPTH_PASS:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.stencil_back_z_pass_op);
-      }
-      return true;
-    case GL_SCISSOR_BOX:
-      *num_written = 4;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.scissor_x);
-        params[1] = static_cast<GLint>(state_.scissor_y);
-        params[2] = static_cast<GLint>(state_.scissor_width);
-        params[3] = static_cast<GLint>(state_.scissor_height);
-      }
-      return true;
-    case GL_FRONT_FACE:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.front_face);
-      }
-      return true;
-    case GL_SAMPLE_COVERAGE_VALUE:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.sample_coverage_value);
-      }
-      return true;
-    case GL_SAMPLE_COVERAGE_INVERT:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.sample_coverage_invert);
-      }
-      return true;
-    case GL_POLYGON_OFFSET_FACTOR:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.polygon_offset_factor);
-      }
-      return true;
-    case GL_POLYGON_OFFSET_UNITS:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.polygon_offset_units);
-      }
-      return true;
-    case GL_CULL_FACE_MODE:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.cull_mode);
-      }
-      return true;
-    case GL_DEPTH_FUNC:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.depth_func);
-      }
-      return true;
-    case GL_STENCIL_FUNC:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.stencil_front_func);
-      }
-      return true;
-    case GL_STENCIL_REF:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.stencil_front_ref);
-      }
-      return true;
-    case GL_STENCIL_VALUE_MASK:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.stencil_front_mask);
-      }
-      return true;
-    case GL_STENCIL_BACK_FUNC:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.stencil_back_func);
-      }
-      return true;
-    case GL_STENCIL_BACK_REF:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.stencil_back_ref);
-      }
-      return true;
-    case GL_STENCIL_BACK_VALUE_MASK:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.stencil_back_mask);
-      }
-      return true;
-    case GL_DEPTH_WRITEMASK:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.depth_mask);
-      }
-      return true;
-    case GL_BLEND_EQUATION_RGB:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.blend_equation_rgb);
-      }
-      return true;
-    case GL_BLEND_EQUATION_ALPHA:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.blend_equation_alpha);
-      }
-      return true;
-    case GL_STENCIL_WRITEMASK:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.stencil_front_writemask);
-      }
-      return true;
-    case GL_STENCIL_BACK_WRITEMASK:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.stencil_back_writemask);
-      }
-      return true;
-    case GL_BLEND:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.enable_flags.blend);
-      }
-      return true;
-    case GL_CULL_FACE:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.enable_flags.cull_face);
-      }
-      return true;
-    case GL_DEPTH_TEST:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.enable_flags.depth_test);
-      }
-      return true;
-    case GL_DITHER:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.enable_flags.dither);
-      }
-      return true;
-    case GL_POLYGON_OFFSET_FILL:
-      *num_written = 1;
-      if (params) {
-        params[0] =
-            static_cast<GLint>(state_.enable_flags.polygon_offset_fill);
-      }
-      return true;
-    case GL_SAMPLE_ALPHA_TO_COVERAGE:
-      *num_written = 1;
-      if (params) {
-        params[0] =
-            static_cast<GLint>(state_.enable_flags.sample_alpha_to_coverage);
-      }
-      return true;
-    case GL_SAMPLE_COVERAGE:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.enable_flags.sample_coverage);
-      }
-      return true;
-    case GL_SCISSOR_TEST:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.enable_flags.scissor_test);
-      }
-      return true;
-    case GL_STENCIL_TEST:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLint>(state_.enable_flags.stencil_test);
-      }
-      return true;
-    default:
-      return false;
-  }
-}
-
-bool GLES2DecoderImpl::GetStateAsGLfloat(
-    GLenum pname, GLfloat* params, GLsizei* num_written) {
-  switch (pname) {
-    case GL_VIEWPORT:
-      *num_written = 4;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.viewport_x);
-        params[1] = static_cast<GLfloat>(state_.viewport_y);
-        params[2] = static_cast<GLfloat>(state_.viewport_width);
-        params[3] = static_cast<GLfloat>(state_.viewport_height);
-      }
-      return true;
-    case GL_BLEND_SRC_RGB:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.blend_source_rgb);
-      }
-      return true;
-    case GL_BLEND_DST_RGB:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.blend_dest_rgb);
-      }
-      return true;
-    case GL_BLEND_SRC_ALPHA:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.blend_source_alpha);
-      }
-      return true;
-    case GL_BLEND_DST_ALPHA:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.blend_dest_alpha);
-      }
-      return true;
-    case GL_LINE_WIDTH:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.line_width);
-      }
-      return true;
-    case GL_BLEND_COLOR:
-      *num_written = 4;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.blend_color_red);
-        params[1] = static_cast<GLfloat>(state_.blend_color_green);
-        params[2] = static_cast<GLfloat>(state_.blend_color_blue);
-        params[3] = static_cast<GLfloat>(state_.blend_color_alpha);
-      }
-      return true;
-    case GL_STENCIL_CLEAR_VALUE:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.stencil_clear);
-      }
-      return true;
-    case GL_COLOR_WRITEMASK:
-      *num_written = 4;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.color_mask_red);
-        params[1] = static_cast<GLfloat>(state_.color_mask_green);
-        params[2] = static_cast<GLfloat>(state_.color_mask_blue);
-        params[3] = static_cast<GLfloat>(state_.color_mask_alpha);
-      }
-      return true;
-    case GL_COLOR_CLEAR_VALUE:
-      *num_written = 4;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.color_clear_red);
-        params[1] = static_cast<GLfloat>(state_.color_clear_green);
-        params[2] = static_cast<GLfloat>(state_.color_clear_blue);
-        params[3] = static_cast<GLfloat>(state_.color_clear_alpha);
-      }
-      return true;
-    case GL_DEPTH_RANGE:
-      *num_written = 2;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.z_near);
-        params[1] = static_cast<GLfloat>(state_.z_far);
-      }
-      return true;
-    case GL_DEPTH_CLEAR_VALUE:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.depth_clear);
-      }
-      return true;
-    case GL_STENCIL_FAIL:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.stencil_front_fail_op);
-      }
-      return true;
-    case GL_STENCIL_PASS_DEPTH_FAIL:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.stencil_front_z_fail_op);
-      }
-      return true;
-    case GL_STENCIL_PASS_DEPTH_PASS:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.stencil_front_z_pass_op);
-      }
-      return true;
-    case GL_STENCIL_BACK_FAIL:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.stencil_back_fail_op);
-      }
-      return true;
-    case GL_STENCIL_BACK_PASS_DEPTH_FAIL:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.stencil_back_z_fail_op);
-      }
-      return true;
-    case GL_STENCIL_BACK_PASS_DEPTH_PASS:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.stencil_back_z_pass_op);
-      }
-      return true;
-    case GL_SCISSOR_BOX:
-      *num_written = 4;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.scissor_x);
-        params[1] = static_cast<GLfloat>(state_.scissor_y);
-        params[2] = static_cast<GLfloat>(state_.scissor_width);
-        params[3] = static_cast<GLfloat>(state_.scissor_height);
-      }
-      return true;
-    case GL_FRONT_FACE:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.front_face);
-      }
-      return true;
-    case GL_SAMPLE_COVERAGE_VALUE:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.sample_coverage_value);
-      }
-      return true;
-    case GL_SAMPLE_COVERAGE_INVERT:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.sample_coverage_invert);
-      }
-      return true;
-    case GL_POLYGON_OFFSET_FACTOR:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.polygon_offset_factor);
-      }
-      return true;
-    case GL_POLYGON_OFFSET_UNITS:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.polygon_offset_units);
-      }
-      return true;
-    case GL_CULL_FACE_MODE:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.cull_mode);
-      }
-      return true;
-    case GL_DEPTH_FUNC:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.depth_func);
-      }
-      return true;
-    case GL_STENCIL_FUNC:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.stencil_front_func);
-      }
-      return true;
-    case GL_STENCIL_REF:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.stencil_front_ref);
-      }
-      return true;
-    case GL_STENCIL_VALUE_MASK:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.stencil_front_mask);
-      }
-      return true;
-    case GL_STENCIL_BACK_FUNC:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.stencil_back_func);
-      }
-      return true;
-    case GL_STENCIL_BACK_REF:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.stencil_back_ref);
-      }
-      return true;
-    case GL_STENCIL_BACK_VALUE_MASK:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.stencil_back_mask);
-      }
-      return true;
-    case GL_DEPTH_WRITEMASK:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.depth_mask);
-      }
-      return true;
-    case GL_BLEND_EQUATION_RGB:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.blend_equation_rgb);
-      }
-      return true;
-    case GL_BLEND_EQUATION_ALPHA:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.blend_equation_alpha);
-      }
-      return true;
-    case GL_STENCIL_WRITEMASK:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.stencil_front_writemask);
-      }
-      return true;
-    case GL_STENCIL_BACK_WRITEMASK:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.stencil_back_writemask);
-      }
-      return true;
-    case GL_BLEND:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.enable_flags.blend);
-      }
-      return true;
-    case GL_CULL_FACE:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.enable_flags.cull_face);
-      }
-      return true;
-    case GL_DEPTH_TEST:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.enable_flags.depth_test);
-      }
-      return true;
-    case GL_DITHER:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.enable_flags.dither);
-      }
-      return true;
-    case GL_POLYGON_OFFSET_FILL:
-      *num_written = 1;
-      if (params) {
-        params[0] =
-            static_cast<GLfloat>(state_.enable_flags.polygon_offset_fill);
-      }
-      return true;
-    case GL_SAMPLE_ALPHA_TO_COVERAGE:
-      *num_written = 1;
-      if (params) {
-        params[0] =
-            static_cast<GLfloat>(state_.enable_flags.sample_alpha_to_coverage);
-      }
-      return true;
-    case GL_SAMPLE_COVERAGE:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.enable_flags.sample_coverage);
-      }
-      return true;
-    case GL_SCISSOR_TEST:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.enable_flags.scissor_test);
-      }
-      return true;
-    case GL_STENCIL_TEST:
-      *num_written = 1;
-      if (params) {
-        params[0] = static_cast<GLfloat>(state_.enable_flags.stencil_test);
-      }
-      return true;
-    default:
-      return false;
-  }
-}
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_AUTOGEN_H_
 
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc b/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc
index b698bf9..cee68f4 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc
@@ -3293,9 +3293,6 @@ TEST_F(GLES2DecoderTest, FramebufferRenderbufferClearColor) {
   EXPECT_CALL(*gl_, ClearColor(0.1f, 0.2f, 0.3f, 0.4f))
       .Times(1)
       .RetiresOnSaturation();
-  EXPECT_CALL(*gl_, Enable(GL_SCISSOR_TEST))
-      .Times(1)
-      .RetiresOnSaturation();
   EXPECT_CALL(*gl_, GetError())
       .WillOnce(Return(GL_NO_ERROR))
       .RetiresOnSaturation();
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_1_autogen.h b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_1_autogen.h
index 8e2a919..7e817667 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_1_autogen.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_1_autogen.h
@@ -175,10 +175,10 @@ TEST_F(GLES2DecoderTest1, BlendColorValidArgs) {
 }
 
 TEST_F(GLES2DecoderTest1, BlendEquationValidArgs) {
-  EXPECT_CALL(*gl_, BlendEquation(GL_FUNC_ADD));
+  EXPECT_CALL(*gl_, BlendEquation(GL_FUNC_SUBTRACT));
   SpecializedSetup<BlendEquation, 0>(true);
   BlendEquation cmd;
-  cmd.Init(GL_FUNC_ADD);
+  cmd.Init(GL_FUNC_SUBTRACT);
   EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
   EXPECT_EQ(GL_NO_ERROR, GetGLError());
 }
@@ -202,10 +202,10 @@ TEST_F(GLES2DecoderTest1, BlendEquationInvalidArgs0_1) {
 }
 
 TEST_F(GLES2DecoderTest1, BlendEquationSeparateValidArgs) {
-  EXPECT_CALL(*gl_, BlendEquationSeparate(GL_FUNC_ADD, GL_FUNC_ADD));
+  EXPECT_CALL(*gl_, BlendEquationSeparate(GL_FUNC_SUBTRACT, GL_FUNC_ADD));
   SpecializedSetup<BlendEquationSeparate, 0>(true);
   BlendEquationSeparate cmd;
-  cmd.Init(GL_FUNC_ADD, GL_FUNC_ADD);
+  cmd.Init(GL_FUNC_SUBTRACT, GL_FUNC_ADD);
   EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
   EXPECT_EQ(GL_NO_ERROR, GetGLError());
 }
@@ -232,7 +232,7 @@ TEST_F(GLES2DecoderTest1, BlendEquationSeparateInvalidArgs1_0) {
   EXPECT_CALL(*gl_, BlendEquationSeparate(_, _)).Times(0);
   SpecializedSetup<BlendEquationSeparate, 0>(false);
   BlendEquationSeparate cmd;
-  cmd.Init(GL_FUNC_ADD, GL_MIN);
+  cmd.Init(GL_FUNC_SUBTRACT, GL_MIN);
   EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
   EXPECT_EQ(GL_INVALID_ENUM, GetGLError());
 }
@@ -241,7 +241,7 @@ TEST_F(GLES2DecoderTest1, BlendEquationSeparateInvalidArgs1_1) {
   EXPECT_CALL(*gl_, BlendEquationSeparate(_, _)).Times(0);
   SpecializedSetup<BlendEquationSeparate, 0>(false);
   BlendEquationSeparate cmd;
-  cmd.Init(GL_FUNC_ADD, GL_MAX);
+  cmd.Init(GL_FUNC_SUBTRACT, GL_MAX);
   EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
   EXPECT_EQ(GL_INVALID_ENUM, GetGLError());
 }
@@ -321,10 +321,10 @@ TEST_F(GLES2DecoderTest1, ClearColorValidArgs) {
 }
 
 TEST_F(GLES2DecoderTest1, ClearDepthfValidArgs) {
-  EXPECT_CALL(*gl_, ClearDepth(1));
+  EXPECT_CALL(*gl_, ClearDepth(0.5f));
   SpecializedSetup<ClearDepthf, 0>(true);
   ClearDepthf cmd;
-  cmd.Init(1);
+  cmd.Init(0.5f);
   EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
   EXPECT_EQ(GL_NO_ERROR, GetGLError());
 }
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_2_autogen.h b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_2_autogen.h
index 173f515..4be5c97 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_2_autogen.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_2_autogen.h
@@ -215,10 +215,10 @@ TEST_F(GLES2DecoderTest2, IsTextureInvalidArgsBadSharedMemoryId) {
 }
 
 TEST_F(GLES2DecoderTest2, LineWidthValidArgs) {
-  EXPECT_CALL(*gl_, LineWidth(1));
+  EXPECT_CALL(*gl_, LineWidth(0.5f));
   SpecializedSetup<LineWidth, 0>(true);
   LineWidth cmd;
-  cmd.Init(1);
+  cmd.Init(0.5f);
   EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
   EXPECT_EQ(GL_NO_ERROR, GetGLError());
 }
@@ -359,19 +359,19 @@ TEST_F(GLES2DecoderTest2, StencilMaskSeparateValidArgs) {
 }
 
 TEST_F(GLES2DecoderTest2, StencilOpValidArgs) {
-  EXPECT_CALL(*gl_, StencilOp(GL_KEEP, GL_KEEP, GL_KEEP));
+  EXPECT_CALL(*gl_, StencilOp(GL_KEEP, GL_INCR, GL_KEEP));
   SpecializedSetup<StencilOp, 0>(true);
   StencilOp cmd;
-  cmd.Init(GL_KEEP, GL_KEEP, GL_KEEP);
+  cmd.Init(GL_KEEP, GL_INCR, GL_KEEP);
   EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
   EXPECT_EQ(GL_NO_ERROR, GetGLError());
 }
 
 TEST_F(GLES2DecoderTest2, StencilOpSeparateValidArgs) {
-  EXPECT_CALL(*gl_, StencilOpSeparate(GL_FRONT, GL_KEEP, GL_KEEP, GL_KEEP));
+  EXPECT_CALL(*gl_, StencilOpSeparate(GL_FRONT, GL_INCR, GL_KEEP, GL_KEEP));
   SpecializedSetup<StencilOpSeparate, 0>(true);
   StencilOpSeparate cmd;
-  cmd.Init(GL_FRONT, GL_KEEP, GL_KEEP, GL_KEEP);
+  cmd.Init(GL_FRONT, GL_INCR, GL_KEEP, GL_KEEP);
   EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
   EXPECT_EQ(GL_NO_ERROR, GetGLError());
 }
diff --git a/gpu/gpu_common.gypi b/gpu/gpu_common.gypi
index 24c7e4d..f6dd581 100644
--- a/gpu/gpu_common.gypi
+++ b/gpu/gpu_common.gypi
@@ -19,6 +19,10 @@
     # with without support for client side arrays and once with for pepper and
     # the OpenGL ES 2.0 compliant for the conformance tests.
     'gles2_implementation_source_files': [
+      'command_buffer/client/client_context_state.h',
+      'command_buffer/client/client_context_state.cc',
+      'command_buffer/client/client_context_state_autogen.h',
+      'command_buffer/client/client_context_state_impl_autogen.h',
       'command_buffer/client/gles2_impl_export.h',
       'command_buffer/client/gles2_implementation_autogen.h',
       'command_buffer/client/gles2_implementation.cc',