Added simple texture demo....

gpu/demos/simple_texture_2d/main.cc

+// Copyright (c) 2010 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 is a simple example that draws a quad with a 2D
+// texture image. The purpose of this example is to demonstrate
+// the basics of 2D texturing
+
+#include "gpu/demos/app_framework/application.h"
+#include "third_party/gles2_book/Chapter_9/Simple_Texture2D/Simple_Texture2D.h"
+
+namespace gpu_demos {
+class SimpleTexture2D : public Application {
+ public:
+  SimpleTexture2D();
+  ~SimpleTexture2D();
+
+  bool Init();
+
+ protected:
+  virtual void Draw(float);

[apatrick, 2010/01/14 19:07:54]

The parameter should be named. Is it delta time? Same goes for the other demos.

[alokp, 2010/01/14 20:07:29]

This variable is not used for this demo. I did not add the name to prevent the
compiler from complaining about unused variable.

+
+ private:
+  ESContext context_;
+  STUserData user_data_;
+
+  DISALLOW_COPY_AND_ASSIGN(SimpleTexture2D);
+};
+
+SimpleTexture2D::SimpleTexture2D() {
+  esInitContext(&context_);
+
+  memset(&user_data_, 0, sizeof(STUserData));
+  context_.userData = &user_data_;
+}
+
+SimpleTexture2D::~SimpleTexture2D() {
+  stShutDown(&context_);
+}
+
+bool SimpleTexture2D::Init() {
+  if (!Application::InitRenderContext()) return false;
+
+  context_.width = width();
+  context_.height = height();
+  if (!stInit(&context_)) return false;
+
+  return true;
+}
+
+void SimpleTexture2D::Draw(float) {

[apatrick, 2010/01/14 19:07:54]

Name parameter.

+  stDraw(&context_);
+}
+}  // namespace gpu_demos
+
+int main(int argc, char *argv[]) {
+  gpu_demos::SimpleTexture2D app;
+  if (!app.Init()) {
+    printf("Could not init.\n");
+    return EXIT_FAILURE;
+  }
+
+  app.MainLoop();
+  return EXIT_SUCCESS;
+}