Plumbs through screen size and scale factor to html_viewer

components/html_viewer/setup.h

+// Copyright 2015 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.
+
+#ifndef COMPONENTS_HTML_VIEWER_SETUP_H_
+#define COMPONENTS_HTML_VIEWER_SETUP_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/threading/thread.h"
+#include "components/html_viewer/discardable_memory_allocator.h"
+#include "components/resource_provider/public/cpp/resource_loader.h"
+#include "ui/gfx/geometry/size.h"
+
+namespace mojo {
+class ApplicationImpl;
+class Shell;
+}
+
+namespace scheduler {
+class RendererScheduler;
+}
+
+namespace html_viewer {
+
+class BlinkPlatformImpl;
+class UISetup;
+class WebMediaPlayerFactory;
+
+// Setup encapsulates the necessary state needed by HTMLViewer. Some objects
+// are created immediately in the constructor, otherwise not until
+// InitIfNecessary() is invoked.
+// Setup can be initialized in two distinct ways:
+// . headless: this is determined by the command line, but can be forced by way
+//   of InitHeadless().
+// . with a ui: this is done via InitIfNecessary().
+class Setup {
+ public:
+  explicit Setup(mojo::ApplicationImpl* app);
+  ~Setup();
+
+  // Use to explicitly create headless regardless of command line switches.
+  // This must be invoked before InitIfNecessary().
+  void InitHeadless();
+
+  // Inits with the specified screen size and device pixel ratio.
+  // NOTE: we wait to complete setup until the device pixel ratio is available
+  // as ResourceBundle uses the device pixel ratio during initialization.
+  void InitIfNecessary(const gfx::Size& screen_size_in_pixels,
+                       float device_pixel_ratio);
+
+  bool is_headless() const { return is_headless_; }
+
+  bool did_init() const { return did_init_; }
+
+  const gfx::Size& screen_size_in_pixels() const {
+    return screen_size_in_pixels_;
+  }
+
+  float device_pixel_ratio() const { return device_pixel_ratio_; }
+
+  scoped_refptr<base::MessageLoopProxy> compositor_thread() {
+    return compositor_thread_.message_loop_proxy();
+  }
+
+  WebMediaPlayerFactory* web_media_player_factory() {
+    return web_media_player_factory_.get();
+  }
+
+ private:
+  mojo::ApplicationImpl* app_;
+
+  resource_provider::ResourceLoader resource_loader_;
+
+  bool is_headless_;
+
+  // True once we've completed init.
+  bool did_init_;
+
+  float device_pixel_ratio_;
+
+  gfx::Size screen_size_in_pixels_;
+
+  scoped_ptr<UISetup> ui_setup_;
+
+  // Skia requires that we have one of these. Unlike the one used in chrome,
+  // this doesn't use purgable shared memory. Instead, it tries to free the
+  // oldest unlocked chunks on allocation.
+  //
+  // TODO(erg): In the long run, delete this allocator and get the real shared
+  // memory based purging allocator working here.
+  DiscardableMemoryAllocator discardable_memory_allocator_;
+
+  scoped_ptr<scheduler::RendererScheduler> renderer_scheduler_;
+  scoped_ptr<BlinkPlatformImpl> blink_platform_;
+  base::Thread compositor_thread_;
+  scoped_ptr<WebMediaPlayerFactory> web_media_player_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(Setup);
+};
+
+}  // namespace html_viewer
+
+#endif  // COMPONENTS_HTML_VIEWER_SETUP_H_