Added mip-mapping demo.

BUG=26099
TEST=Run mip_map_2d executable. You should see two quads with checker-board pattern. The left will exhibit aliasing but right one will be anti-aliased.
Review URL: http://codereview.chromium.org/542067

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@36209 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 75 insertions, 0 deletions

diff --git a/gpu/demos/demos.gyp b/gpu/demos/demos.gyp
index 43ecb50..a7596c1 100644
--- a/gpu/demos/demos.gyp
+++ b/gpu/demos/demos.gyp
@@ -35,6 +35,17 @@
       ],
     },
     {
+      'target_name': 'mip_map_2d',
+      'type': 'executable',
+      'dependencies': [
+        'app_framework',
+        '../../third_party/gles2_book/gles2_book.gyp:mip_map_2d',
+      ],
+      'sources': [
+        'mip_map_2d/main.cc',
+      ],
+    },
+    {
       'target_name': 'simple_vertex_shader',
       'type': 'executable',
       'dependencies': [
diff --git a/gpu/demos/mip_map_2d/main.cc b/gpu/demos/mip_map_2d/main.cc
new file mode 100644
index 0000000..6fa9bed
--- /dev/null
+++ b/gpu/demos/mip_map_2d/main.cc
@@ -0,0 +1,64 @@
+// 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 demonstrates generating a mipmap chain
+// and rendering with it.
+
+#include "gpu/demos/app_framework/application.h"
+#include "third_party/gles2_book/Chapter_9/MipMap2D/MipMap2D.h"
+
+namespace gpu_demos {
+class MipMap2D : public Application {
+ public:
+  MipMap2D();
+  ~MipMap2D();
+
+  bool Init();
+
+ protected:
+  virtual void Draw(float);
+
+ private:
+  ESContext context_;
+  MMUserData user_data_;
+
+  DISALLOW_COPY_AND_ASSIGN(MipMap2D);
+};
+
+MipMap2D::MipMap2D() {
+  esInitContext(&context_);
+
+  memset(&user_data_, 0, sizeof(MMUserData));
+  context_.userData = &user_data_;
+}
+
+MipMap2D::~MipMap2D() {
+  mmShutDown(&context_);
+}
+
+bool MipMap2D::Init() {
+  if (!Application::InitRenderContext()) return false;
+
+  context_.width = width();
+  context_.height = height();
+  if (!mmInit(&context_)) return false;
+
+  return true;
+}
+
+void MipMap2D::Draw(float) {
+  mmDraw(&context_);
+}
+}  // namespace gpu_demos
+
+int main(int argc, char *argv[]) {
+  gpu_demos::MipMap2D app;
+  if (!app.Init()) {
+    printf("Could not init.\n");
+    return EXIT_FAILURE;
+  }
+
+  app.MainLoop();
+  return EXIT_SUCCESS;
+}