cxfa_imagerenderer.h

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// Copyright 2018 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 XFA_FXFA_CXFA_IMAGERENDERER_H_
#define XFA_FXFA_CXFA_IMAGERENDERER_H_
 
#include <memory>
 
#include "core/fxcrt/fx_coordinates.h"
#include "core/fxcrt/retain_ptr.h"
#include "core/fxcrt/unowned_ptr.h"
 
class CFX_AggImageRenderer;
class CFX_DIBitmap;
class CFX_RenderDevice;
 
class CXFA_ImageRenderer {
 public:
  CXFA_ImageRenderer(CFX_RenderDevice* device,
                     RetainPtr<CFX_DIBitmap> bitmap,
                     const CFX_Matrix& image_to_device);
  ~CXFA_ImageRenderer();
 
  // Returns whether to continue or not.
  bool Start();
  bool Continue();
 
 private:
  enum class State : bool { kInitial = 0, kStarted };
 
  State m_State = State::kInitial;
  const CFX_Matrix m_ImageMatrix;
  UnownedPtr<CFX_RenderDevice> const m_pDevice;
  RetainPtr<CFX_DIBitmap> const m_pBitmap;
  std::unique_ptr<CFX_AggImageRenderer> m_DeviceHandle;
};
 
#endif  // XFA_FXFA_CXFA_IMAGERENDERER_H_