Mojo container example for hosting Pepper plugins

mojo/examples/pepper_container_app/pepper_spinning_cube_demo/spinning_cube.cc

Index: mojo/examples/pepper_container_app/pepper_spinning_cube_demo/spinning_cube.cc
diff --git a/mojo/examples/sample_app/spinning_cube.cc b/mojo/examples/pepper_container_app/pepper_spinning_cube_demo/spinning_cube.cc
similarity index 87%
copy from mojo/examples/sample_app/spinning_cube.cc
copy to mojo/examples/pepper_container_app/pepper_spinning_cube_demo/spinning_cube.cc
index 7983563fd60ebf55eeb415aceefb1b89e7a28e50..223351038f491a5bbe39529ab87b05e12cfe5ecd 100644
--- a/mojo/examples/sample_app/spinning_cube.cc
+++ b/mojo/examples/pepper_container_app/pepper_spinning_cube_demo/spinning_cube.cc
@@ -1,4 +1,4 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
+// Copyright 2014 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.
 
@@ -14,13 +14,15 @@
 //            http://www.opengles-book.com
 //
 
-#include "mojo/examples/sample_app/spinning_cube.h"
+#include "mojo/examples/pepper_container_app/pepper_spinning_cube_demo/spinning_cube.h"
 
 #include <math.h>
 #include <stdlib.h>
 #include <string.h>
-#include <GLES2/gl2.h>
-#include <GLES2/gl2ext.h>
+
+#include <algorithm>
+
+#include "ppapi/lib/gl/include/GLES2/gl2.h"
 
 namespace mojo {
 namespace examples {
@@ -353,41 +355,47 @@ SpinningCube::~SpinningCube() {
     glDeleteBuffers(1, &state_->vbo_indices_);
   if (state_->program_object_)
     glDeleteProgram(state_->program_object_);
+
+  delete state_;
 }
 
 void SpinningCube::Init(uint32_t width, uint32_t height) {
   width_ = width;
   height_ = height;
 
-  const char vertext_shader_source[] =
-      "uniform mat4 u_mvpMatrix;                   \n"
-      "attribute vec4 a_position;                  \n"
-      "void main()                                 \n"
-      "{                                           \n"
-      "   gl_Position = u_mvpMatrix * a_position;  \n"
-      "}                                           \n";
-
-  const char fragment_shader_source[] =
-      "precision mediump float;                            \n"
-      "void main()                                         \n"
-      "{                                                   \n"
-      "  gl_FragColor = vec4( 0.0, 1.0, 0.0, 1.0 );        \n"
-      "}                                                   \n";
-
-  state_->program_object_ = LoadProgram(
-      vertext_shader_source, fragment_shader_source);
-  state_->position_location_ = glGetAttribLocation(
-      state_->program_object_, "a_position");
-  state_->mvp_location_ = glGetUniformLocation(
-      state_->program_object_, "u_mvpMatrix");
-  state_->num_indices_ = GenerateCube(
-      &state_->vbo_vertices_, &state_->vbo_indices_);
-
-  glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
-  initialized_ = true;
+  if (!initialized_) {
+    initialized_ = true;
+    const char vertext_shader_source[] =
+        "uniform mat4 u_mvpMatrix;                   \n"
+        "attribute vec4 a_position;                  \n"
+        "void main()                                 \n"
+        "{                                           \n"
+        "   gl_Position = u_mvpMatrix * a_position;  \n"
+        "}                                           \n";
+
+    const char fragment_shader_source[] =
+        "precision mediump float;                            \n"
+        "void main()                                         \n"
+        "{                                                   \n"
+        "  gl_FragColor = vec4( 0.0, 0.0, 1.0, 1.0 );        \n"
+        "}                                                   \n";
+
+    state_->program_object_ = LoadProgram(
+        vertext_shader_source, fragment_shader_source);
+    state_->position_location_ = glGetAttribLocation(
+        state_->program_object_, "a_position");
+    state_->mvp_location_ = glGetUniformLocation(
+        state_->program_object_, "u_mvpMatrix");
+    state_->num_indices_ = GenerateCube(
+        &state_->vbo_vertices_, &state_->vbo_indices_);
+
+    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
+  }
 }
 
 void SpinningCube::OnGLContextLost() {
+  // TODO(yzshen): Is it correct that in this case we don't need to do cleanup
+  // for program and buffers?
   initialized_ = false;
   height_ = 0;
   width_ = 0;