ui/gfx/image/image_skia_source.h

// Copyright (c) 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 UI_GFX_IMAGE_IMAGE_SKIA_SOURCE_H_
#define UI_GFX_IMAGE_IMAGE_SKIA_SOURCE_H_

#include <vector>

#include "ui/gfx/gfx_export.h"

namespace gfx {

class ImageSkiaRep;

class GFX_EXPORT ImageSkiaSource {
 public:
  virtual ~ImageSkiaSource();

  // Returns the ImageSkiaRep for the given |scale|. ImageSkia caches the
  // returned ImageSkiaRep and calls this method only if it doesn't have
  // ImageSkiaRep for given |scale|. There is no need for the implementation to
  // cache the image.
  virtual gfx::ImageSkiaRep GetImageForScale(float scale) = 0;

  // Subclasses should override this to return true when they are capable of
  // providing an exact representation at any desired scale factor.
  virtual bool HasRepresentationAtAllScales() const;
};

}  // namespace gfx

#endif  // UI_GFX_IMAGE_IMAGE_SKIA_SOURCE_H_