cc/resources/resource.h

// Copyright 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.

#ifndef CC_RESOURCES_RESOURCE_H_
#define CC_RESOURCES_RESOURCE_H_

#include "cc/resources/resource_provider.h"
#include "ui/gfx/geometry/size.h"

namespace cc {

class Resource {
 public:
  Resource() : id_(0) {}
  Resource(unsigned id, const gfx::Size& size, ResourceFormat format)
      : id_(id),
        size_(size),
        format_(format) {}

  ResourceProvider::ResourceId id() const { return id_; }
  gfx::Size size() const { return size_; }
  ResourceFormat format() const { return format_; }
  size_t bytes() const;

  inline static size_t MemorySizeBytes(const gfx::Size& size,
                                       ResourceFormat format) {
    DCHECK_EQ(0u, (BitsPerPixel(format) * size.width() * size.height()) % 8);
    return (BitsPerPixel(format) * size.width() * size.height()) / 8;
  }

 protected:
  void set_id(ResourceProvider::ResourceId id) { id_ = id; }
  void set_dimensions(const gfx::Size& size, ResourceFormat format) {
    size_ = size;
    format_ = format;
  }

 private:
  ResourceProvider::ResourceId id_;
  gfx::Size size_;
  ResourceFormat format_;

  DISALLOW_COPY_AND_ASSIGN(Resource);
};

}  // namespace cc

#endif  // CC_RESOURCES_RESOURCE_H_