Rename CFX_DIBSource to CFX_DIBBase.

It is not a source from which you can get CFX_DIBs, but rather a
base class from which all DIBs inherit.

Do the same thing for the CPDF_DIBSource wrapper class.
Mechanical change apart from adding a one-line comment in cfx_dibbase.h

Change-Id: Id2bde87813ca301d9fafc55ce08d703dfc6a7184
Reviewed-on: https://pdfium-review.googlesource.com/41352
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

1 files changed, 163 insertions, 0 deletions

diff --git a/core/fpdfapi/render/cpdf_dibbase.h b/core/fpdfapi/render/cpdf_dibbase.h
new file mode 100644
index 0000000000..a1008470b6
--- /dev/null
+++ b/core/fpdfapi/render/cpdf_dibbase.h
@@ -0,0 +1,163 @@
+// Copyright 2017 PDFium Authors. All rights reserved.
+// 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_FPDFAPI_RENDER_CPDF_DIBBASE_H_
+#define CORE_FPDFAPI_RENDER_CPDF_DIBBASE_H_
+
+#include <map>
+#include <memory>
+#include <vector>
+
+#include "core/fpdfapi/page/cpdf_clippath.h"
+#include "core/fpdfapi/page/cpdf_countedobject.h"
+#include "core/fpdfapi/page/cpdf_graphicstates.h"
+#include "core/fpdfapi/parser/cpdf_stream_acc.h"
+#include "core/fpdfapi/render/cpdf_imageloader.h"
+#include "core/fpdfapi/render/cpdf_rendercontext.h"
+#include "core/fpdfapi/render/cpdf_renderoptions.h"
+#include "core/fxcrt/retain_ptr.h"
+#include "core/fxcrt/unowned_ptr.h"
+#include "core/fxge/cfx_defaultrenderdevice.h"
+#include "core/fxge/dib/cfx_dibbase.h"
+
+class CCodec_Jbig2Context;
+class CCodec_ScanlineDecoder;
+class CPDF_Color;
+class CPDF_Dictionary;
+class CPDF_Document;
+class CPDF_Stream;
+
+struct DIB_COMP_DATA {
+  float m_DecodeMin;
+  float m_DecodeStep;
+  int m_ColorKeyMin;
+  int m_ColorKeyMax;
+};
+
+#define FPDF_HUGE_IMAGE_SIZE 60000000
+
+class CPDF_DIBBase : public CFX_DIBBase {
+ public:
+  enum class LoadState : uint8_t { kFail, kSuccess, kContinue };
+
+  template <typename T, typename... Args>
+  friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
+
+  bool Load(CPDF_Document* pDoc, const CPDF_Stream* pStream);
+
+  // CFX_DIBBase
+  bool SkipToScanline(int line, PauseIndicatorIface* pPause) const override;
+  uint8_t* GetBuffer() const override;
+  const uint8_t* GetScanline(int line) const override;
+  void DownSampleScanline(int line,
+                          uint8_t* dest_scan,
+                          int dest_bpp,
+                          int dest_width,
+                          bool bFlipX,
+                          int clip_left,
+                          int clip_width) const override;
+
+  const CPDF_ColorSpace* GetColorSpace() const { return m_pColorSpace.Get(); }
+  uint32_t GetMatteColor() const { return m_MatteColor; }
+
+  LoadState StartLoadDIBBase(CPDF_Document* pDoc,
+                             const CPDF_Stream* pStream,
+                             bool bHasMask,
+                             const CPDF_Dictionary* pFormResources,
+                             CPDF_Dictionary* pPageResources,
+                             bool bStdCS,
+                             uint32_t GroupFamily,
+                             bool bLoadMask);
+  LoadState ContinueLoadDIBBase(PauseIndicatorIface* pPause);
+  RetainPtr<CPDF_DIBBase> DetachMask();
+
+  bool IsJBigImage() const;
+
+ private:
+  CPDF_DIBBase();
+  ~CPDF_DIBBase() override;
+
+  LoadState StartLoadMask();
+  LoadState StartLoadMaskDIB();
+  bool ContinueToLoadMask();
+  LoadState ContinueLoadMaskDIB(PauseIndicatorIface* pPause);
+  bool LoadColorInfo(const CPDF_Dictionary* pFormResources,
+                     const CPDF_Dictionary* pPageResources);
+  bool GetDecodeAndMaskArray(bool* bDefaultDecode, bool* bColorKey);
+  RetainPtr<CFX_DIBitmap> LoadJpxBitmap();
+  void LoadPalette();
+  LoadState CreateDecoder();
+  bool CreateDCTDecoder(const uint8_t* src_data,
+                        uint32_t src_size,
+                        const CPDF_Dictionary* pParams);
+  void TranslateScanline24bpp(uint8_t* dest_scan,
+                              const uint8_t* src_scan) const;
+  bool TranslateScanline24bppDefaultDecode(uint8_t* dest_scan,
+                                           const uint8_t* src_scan) const;
+  void ValidateDictParam();
+  void DownSampleScanline1Bit(int orig_Bpp,
+                              int dest_Bpp,
+                              uint32_t src_width,
+                              const uint8_t* pSrcLine,
+                              uint8_t* dest_scan,
+                              int dest_width,
+                              bool bFlipX,
+                              int clip_left,
+                              int clip_width) const;
+  void DownSampleScanline8Bit(int orig_Bpp,
+                              int dest_Bpp,
+                              uint32_t src_width,
+                              const uint8_t* pSrcLine,
+                              uint8_t* dest_scan,
+                              int dest_width,
+                              bool bFlipX,
+                              int clip_left,
+                              int clip_width) const;
+  void DownSampleScanline32Bit(int orig_Bpp,
+                               int dest_Bpp,
+                               uint32_t src_width,
+                               const uint8_t* pSrcLine,
+                               uint8_t* dest_scan,
+                               int dest_width,
+                               bool bFlipX,
+                               int clip_left,
+                               int clip_width) const;
+  bool TransMask() const;
+
+  UnownedPtr<CPDF_Document> m_pDocument;
+  UnownedPtr<const CPDF_Stream> m_pStream;
+  UnownedPtr<const CPDF_Dictionary> m_pDict;
+  RetainPtr<CPDF_StreamAcc> m_pStreamAcc;
+  UnownedPtr<CPDF_ColorSpace> m_pColorSpace;
+  uint32_t m_Family = 0;
+  uint32_t m_bpc = 0;
+  uint32_t m_bpc_orig = 0;
+  uint32_t m_nComponents = 0;
+  uint32_t m_GroupFamily = 0;
+  uint32_t m_MatteColor = 0;
+  bool m_bLoadMask = false;
+  bool m_bDefaultDecode = true;
+  bool m_bImageMask = false;
+  bool m_bDoBpcCheck = true;
+  bool m_bColorKey = false;
+  bool m_bHasMask = false;
+  bool m_bStdCS = false;
+  std::vector<DIB_COMP_DATA> m_CompData;
+  std::unique_ptr<uint8_t, FxFreeDeleter> m_pLineBuf;
+  std::unique_ptr<uint8_t, FxFreeDeleter> m_pMaskedLine;
+  RetainPtr<CFX_DIBitmap> m_pCachedBitmap;
+  RetainPtr<CPDF_DIBBase> m_pMask;
+  RetainPtr<CPDF_StreamAcc> m_pGlobalStream;
+  std::unique_ptr<CCodec_ScanlineDecoder> m_pDecoder;
+
+  // Must come after |m_pCachedBitmap|.
+  std::unique_ptr<CCodec_Jbig2Context> m_pJbig2Context;
+
+  UnownedPtr<const CPDF_Stream> m_pMaskStream;
+  LoadState m_Status = LoadState::kFail;
+};
+
+#endif  // CORE_FPDFAPI_RENDER_CPDF_DIBBASE_H_