xfa/fxfa/cxfa_imagerenderer.h

// 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"
#include "core/fxge/renderdevicedriver_iface.h"

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 state_ = State::kInitial;
  const CFX_Matrix image_matrix_;
  UnownedPtr<CFX_RenderDevice> const device_;
  RetainPtr<CFX_DIBitmap> const bitmap_;
  std::unique_ptr<RenderDeviceDriverIface::Continuation> continuation_;
};

#endif  // XFA_FXFA_CXFA_IMAGERENDERER_H_