1// Copyright 2016 PDFium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7#ifndef CORE_FPDFAPI_RENDER_CPDF_PROGRESSIVERENDERER_H_
8#define CORE_FPDFAPI_RENDER_CPDF_PROGRESSIVERENDERER_H_
9
10#include <memory>
11
12#include "core/fpdfapi/page/cpdf_pageobjectlist.h"
13#include "core/fpdfapi/render/cpdf_rendercontext.h"
14#include "core/fxcrt/fx_coordinates.h"
15#include "core/fxcrt/fx_system.h"
16
17class CPDF_RenderOptions;
18class CPDF_RenderStatus;
19class CFX_RenderDevice;
20class IFX_Pause;
21
22class CPDF_ProgressiveRenderer {
23 public:
24  // Must match FDF_RENDER_* definitions in public/fpdf_progressive.h, but
25  // cannot #include that header. fpdfsdk/fpdf_progressive.cpp has
26  // static_asserts to make sure the two sets of values match.
27  enum Status {
28    Ready,          // FPDF_RENDER_READER
29    ToBeContinued,  // FPDF_RENDER_TOBECOUNTINUED
30    Done,           // FPDF_RENDER_DONE
31    Failed          // FPDF_RENDER_FAILED
32  };
33
34  static int ToFPDFStatus(Status status) { return static_cast<int>(status); }
35
36  CPDF_ProgressiveRenderer(CPDF_RenderContext* pContext,
37                           CFX_RenderDevice* pDevice,
38                           const CPDF_RenderOptions* pOptions);
39  ~CPDF_ProgressiveRenderer();
40
41  Status GetStatus() const { return m_Status; }
42  void Start(IFX_Pause* pPause);
43  void Continue(IFX_Pause* pPause);
44
45 private:
46  // Maximum page objects to render before checking for pause.
47  static const int kStepLimit = 100;
48
49  Status m_Status;
50  CPDF_RenderContext* const m_pContext;
51  CFX_RenderDevice* const m_pDevice;
52  const CPDF_RenderOptions* const m_pOptions;
53  std::unique_ptr<CPDF_RenderStatus> m_pRenderStatus;
54  CFX_FloatRect m_ClipRect;
55  uint32_t m_LayerIndex;
56  CPDF_RenderContext::Layer* m_pCurrentLayer;
57  CPDF_PageObjectList::iterator m_LastObjectRendered;
58};
59
60#endif  // CORE_FPDFAPI_RENDER_CPDF_PROGRESSIVERENDERER_H_
61