cfx_imagerenderer.h

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// Copyright 2017 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
#ifndef CORE_FXGE_DIB_CFX_IMAGERENDERER_H_
#define CORE_FXGE_DIB_CFX_IMAGERENDERER_H_
 
#include <memory>
 
#include "core/fxcrt/fx_coordinates.h"
#include "core/fxcrt/retain_ptr.h"
#include "core/fxcrt/unowned_ptr.h"
#include "core/fxge/dib/cfx_bitmapcomposer.h"
 
class CFX_DIBBase;
class CFX_DIBitmap;
class CFX_ImageTransformer;
class CFX_ImageStretcher;
class PauseIndicatorIface;
 
class CFX_ImageRenderer {
 public:
  CFX_ImageRenderer(const RetainPtr<CFX_DIBitmap>& pDevice,
                    const CFX_ClipRgn* pClipRgn,
                    RetainPtr<const CFX_DIBBase> source,
                    float alpha,
                    uint32_t mask_color,
                    const CFX_Matrix& matrix,
                    const FXDIB_ResampleOptions& options,
                    bool bRgbByteOrder);
  ~CFX_ImageRenderer();
 
  bool Continue(PauseIndicatorIface* pPause);
 
 private:
  enum class State : uint8_t { kInitial = 0, kStretching, kTransforming };
 
  RetainPtr<CFX_DIBitmap> const m_pDevice;
  UnownedPtr<const CFX_ClipRgn> const m_pClipRgn;
  const CFX_Matrix m_Matrix;
  std::unique_ptr<CFX_ImageTransformer> m_pTransformer;
  std::unique_ptr<CFX_ImageStretcher> m_Stretcher;
  CFX_BitmapComposer m_Composer;
  FX_RECT m_ClipBox;
  const float m_Alpha;
  uint32_t m_MaskColor;
  State m_State = State::kInitial;
  const bool m_bRgbByteOrder;
};
 
#endif  // CORE_FXGE_DIB_CFX_IMAGERENDERER_H_