frame_interface_optimizer.h

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/*
 * Copyright 2014 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http:///www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


#ifndef PAGESPEED_KERNEL_IMAGE_FRAME_INTERFACE_OPTIMIZER_H_
#define PAGESPEED_KERNEL_IMAGE_FRAME_INTERFACE_OPTIMIZER_H_

#include <cstddef>
#include "pagespeed/kernel/base/basictypes.h"
#include "pagespeed/kernel/base/scoped_ptr.h"
#include "pagespeed/kernel/image/image_frame_interface.h"
#include "pagespeed/kernel/image/image_util.h"
#include "pagespeed/kernel/image/scanline_status.h"

namespace net_instaweb {
class MessageHandler;
}

namespace pagespeed {

namespace image_compression {

class MultipleFramePaddingReader : public MultipleFrameReader {
 public:
  explicit MultipleFramePaddingReader(MultipleFrameReader* reader);
  virtual ~MultipleFramePaddingReader();

  virtual ScanlineStatus Reset();
  virtual ScanlineStatus Initialize();
  virtual bool HasMoreFrames() const;
  virtual bool HasMoreScanlines() const;
  virtual ScanlineStatus PrepareNextFrame();
  virtual ScanlineStatus ReadNextScanline(const void** out_scanline_bytes);
  virtual ScanlineStatus GetFrameSpec(FrameSpec* frame_spec) const;
  virtual ScanlineStatus GetImageSpec(ImageSpec* image_spec) const;
  MessageHandler* message_handler() const;
  virtual ScanlineStatus set_quirks_mode(QuirksMode quirks_mode);
  virtual QuirksMode quirks_mode() const;

 private:
  net_instaweb::scoped_ptr<MultipleFrameReader> impl_;

  ImageSpec image_spec_;

  FrameSpec impl_frame_spec_;

  FrameSpec padded_frame_spec_;

  bool frame_is_full_height_;

  bool frame_is_full_width_;

  bool frame_needs_no_padding_;

  size_px current_scanline_idx_;

  net_instaweb::scoped_array<uint8_t> current_scanline_;

  net_instaweb::scoped_array<uint8_t> scanline_template_;

  size_t bytes_per_pixel_;

  uint8_t* foreground_scanline_start_byte_;

  
};

}  

}  

#endif