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_pageobjectholder.h"
13 #include "core/fpdfapi/render/cpdf_rendercontext.h"
14 #include "core/fxcrt/fx_coordinates.h"
15 #include "core/fxcrt/fx_system.h"
16 
17 class CPDF_RenderOptions;
18 class CPDF_RenderStatus;
19 class CFX_RenderDevice;
20 class PauseIndicatorIface;
21 
22 class 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     kReady,          // FPDF_RENDER_READY
29     kToBeContinued,  // FPDF_RENDER_TOBECONTINUED
30     kDone,           // FPDF_RENDER_DONE
31     kFailed          // FPDF_RENDER_FAILED
32   };
33 
34   CPDF_ProgressiveRenderer(CPDF_RenderContext* pContext,
35                            CFX_RenderDevice* pDevice,
36                            const CPDF_RenderOptions* pOptions);
37   ~CPDF_ProgressiveRenderer();
38 
GetStatus()39   Status GetStatus() const { return m_Status; }
40   void Start(PauseIndicatorIface* pPause);
41   void Continue(PauseIndicatorIface* pPause);
42 
43  private:
44   // Maximum page objects to render before checking for pause.
45   static const int kStepLimit = 100;
46 
47   Status m_Status = kReady;
48   UnownedPtr<CPDF_RenderContext> const m_pContext;
49   UnownedPtr<CFX_RenderDevice> const m_pDevice;
50   const CPDF_RenderOptions* const m_pOptions;
51   std::unique_ptr<CPDF_RenderStatus> m_pRenderStatus;
52   CFX_FloatRect m_ClipRect;
53   uint32_t m_LayerIndex = 0;
54   CPDF_RenderContext::Layer* m_pCurrentLayer = nullptr;
55   CPDF_PageObjectHolder::const_iterator m_LastObjectRendered;
56 };
57 
58 #endif  // CORE_FPDFAPI_RENDER_CPDF_PROGRESSIVERENDERER_H_
59