Split fx_dib part 1

Move CFX_DIBSource to its own file. Also move the classes that inherit from it
to their own headers. Their cpp's will be added in followup.

Change-Id: Id2b53e124ea5445c558bfcf627bf526870cc92e8
Reviewed-on: https://pdfium-review.googlesource.com/3450
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Nicolás Peña <npm@chromium.org>

1 files changed, 2 insertions, 312 deletions

diff --git a/core/fxge/fx_dib.h b/core/fxge/fx_dib.h
index 2208276fa7..85af766992 100644
--- a/core/fxge/fx_dib.h
+++ b/core/fxge/fx_dib.h
@@ -13,66 +13,14 @@
 #include "core/fxcrt/cfx_retain_ptr.h"
 #include "core/fxcrt/fx_basic.h"
 #include "core/fxcrt/fx_coordinates.h"
+#include "core/fxge/dib/cfx_dibitmap.h"
+#include "core/fxge/dib/cfx_dibsource.h"
 #include "third_party/base/stl_util.h"
 
-enum FXDIB_Format {
-  FXDIB_Invalid = 0,
-  FXDIB_1bppMask = 0x101,
-  FXDIB_1bppRgb = 0x001,
-  FXDIB_1bppCmyk = 0x401,
-  FXDIB_8bppMask = 0x108,
-  FXDIB_8bppRgb = 0x008,
-  FXDIB_8bppRgba = 0x208,
-  FXDIB_8bppCmyk = 0x408,
-  FXDIB_8bppCmyka = 0x608,
-  FXDIB_Rgb = 0x018,
-  FXDIB_Rgba = 0x218,
-  FXDIB_Rgb32 = 0x020,
-  FXDIB_Argb = 0x220,
-  FXDIB_Cmyk = 0x420,
-  FXDIB_Cmyka = 0x620,
-};
-
-enum FXDIB_Channel {
-  FXDIB_Red = 1,
-  FXDIB_Green,
-  FXDIB_Blue,
-  FXDIB_Cyan,
-  FXDIB_Magenta,
-  FXDIB_Yellow,
-  FXDIB_Black,
-  FXDIB_Alpha
-};
-
-#define FXDIB_DOWNSAMPLE 0x04
-#define FXDIB_INTERPOL 0x20
-#define FXDIB_BICUBIC_INTERPOL 0x80
-#define FXDIB_NOSMOOTH 0x100
-#define FXDIB_BLEND_NORMAL 0
-#define FXDIB_BLEND_MULTIPLY 1
-#define FXDIB_BLEND_SCREEN 2
-#define FXDIB_BLEND_OVERLAY 3
-#define FXDIB_BLEND_DARKEN 4
-#define FXDIB_BLEND_LIGHTEN 5
-
-#define FXDIB_BLEND_COLORDODGE 6
-#define FXDIB_BLEND_COLORBURN 7
-#define FXDIB_BLEND_HARDLIGHT 8
-#define FXDIB_BLEND_SOFTLIGHT 9
-#define FXDIB_BLEND_DIFFERENCE 10
-#define FXDIB_BLEND_EXCLUSION 11
-#define FXDIB_BLEND_NONSEPARABLE 21
-#define FXDIB_BLEND_HUE 21
-#define FXDIB_BLEND_SATURATION 22
-#define FXDIB_BLEND_COLOR 23
-#define FXDIB_BLEND_LUMINOSITY 24
-#define FXDIB_BLEND_UNSUPPORTED -1
 typedef uint32_t FX_ARGB;
 typedef uint32_t FX_COLORREF;
 typedef uint32_t FX_CMYK;
 class CFX_ClipRgn;
-class CFX_DIBSource;
-class CFX_DIBitmap;
 class CStretchEngine;
 
 #define FXSYS_RGB(r, g, b) ((r) | ((g) << 8) | ((b) << 16))
@@ -169,229 +117,6 @@ bool ConvertBuffer(FXDIB_Format dest_format,
                    int src_top,
                    std::unique_ptr<uint32_t, FxFreeDeleter>* pal);
 
-class CFX_DIBSource : public CFX_Retainable {
- public:
-  ~CFX_DIBSource() override;
-
-  virtual uint8_t* GetBuffer() const;
-  virtual const uint8_t* GetScanline(int line) const = 0;
-  virtual bool SkipToScanline(int line, IFX_Pause* pPause) const;
-  virtual void DownSampleScanline(int line,
-                                  uint8_t* dest_scan,
-                                  int dest_bpp,
-                                  int dest_width,
-                                  bool bFlipX,
-                                  int clip_left,
-                                  int clip_width) const = 0;
-
-  int GetWidth() const { return m_Width; }
-  int GetHeight() const { return m_Height; }
-
-  FXDIB_Format GetFormat() const {
-    return (FXDIB_Format)(m_AlphaFlag * 0x100 + m_bpp);
-  }
-  uint32_t GetPitch() const { return m_Pitch; }
-  uint32_t* GetPalette() const { return m_pPalette.get(); }
-  int GetBPP() const { return m_bpp; }
-
-  // TODO(thestig): Investigate this. Given the possible values of FXDIB_Format,
-  // it feels as though this should be implemented as !!(m_AlphaFlag & 1) and
-  // IsOpaqueImage() below should never be able to return true.
-  bool IsAlphaMask() const { return m_AlphaFlag == 1; }
-  bool HasAlpha() const { return !!(m_AlphaFlag & 2); }
-  bool IsOpaqueImage() const { return !(m_AlphaFlag & 3); }
-  bool IsCmykImage() const { return !!(m_AlphaFlag & 4); }
-
-  int GetPaletteSize() const {
-    return IsAlphaMask() ? 0 : (m_bpp == 1 ? 2 : (m_bpp == 8 ? 256 : 0));
-  }
-
-  uint32_t GetPaletteEntry(int index) const;
-
-  void SetPaletteEntry(int index, uint32_t color);
-  uint32_t GetPaletteArgb(int index) const { return GetPaletteEntry(index); }
-  void SetPaletteArgb(int index, uint32_t color) {
-    SetPaletteEntry(index, color);
-  }
-
-  // Copies into internally-owned palette.
-  void SetPalette(const uint32_t* pSrcPal);
-
-  CFX_RetainPtr<CFX_DIBitmap> Clone(const FX_RECT* pClip = nullptr) const;
-  CFX_RetainPtr<CFX_DIBitmap> CloneConvert(FXDIB_Format format);
-  CFX_RetainPtr<CFX_DIBitmap> StretchTo(int dest_width,
-                                        int dest_height,
-                                        uint32_t flags = 0,
-                                        const FX_RECT* pClip = nullptr);
-  CFX_RetainPtr<CFX_DIBitmap> TransformTo(const CFX_Matrix* pMatrix,
-                                          int& left,
-                                          int& top,
-                                          uint32_t flags = 0,
-                                          const FX_RECT* pClip = nullptr);
-  CFX_RetainPtr<CFX_DIBitmap> SwapXY(bool bXFlip,
-                                     bool bYFlip,
-                                     const FX_RECT* pClip = nullptr) const;
-  CFX_RetainPtr<CFX_DIBitmap> FlipImage(bool bXFlip, bool bYFlip) const;
-
-  CFX_RetainPtr<CFX_DIBitmap> CloneAlphaMask(
-      const FX_RECT* pClip = nullptr) const;
-
-  // Copies into internally-owned mask.
-  bool SetAlphaMask(const CFX_RetainPtr<CFX_DIBSource>& pAlphaMask,
-                    const FX_RECT* pClip = nullptr);
-
-  void GetOverlapRect(int& dest_left,
-                      int& dest_top,
-                      int& width,
-                      int& height,
-                      int src_width,
-                      int src_height,
-                      int& src_left,
-                      int& src_top,
-                      const CFX_ClipRgn* pClipRgn);
-
-#if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_
-  void DebugVerifyBitmapIsPreMultiplied(void* buffer = nullptr) const;
-#endif
-
-  CFX_RetainPtr<CFX_DIBitmap> m_pAlphaMask;
-
- protected:
-  CFX_DIBSource();
-
-  void BuildPalette();
-  bool BuildAlphaMask();
-  int FindPalette(uint32_t color) const;
-  void GetPalette(uint32_t* pal, int alpha) const;
-
-  int m_Width;
-  int m_Height;
-  int m_bpp;
-  uint32_t m_AlphaFlag;
-  uint32_t m_Pitch;
-  // TODO(weili): Use std::vector for this.
-  std::unique_ptr<uint32_t, FxFreeDeleter> m_pPalette;
-};
-
-class CFX_DIBitmap : public CFX_DIBSource {
- public:
-  template <typename T, typename... Args>
-  friend CFX_RetainPtr<T> pdfium::MakeRetain(Args&&... args);
-
-  ~CFX_DIBitmap() override;
-
-  bool Create(int width,
-              int height,
-              FXDIB_Format format,
-              uint8_t* pBuffer = nullptr,
-              int pitch = 0);
-
-  bool Copy(const CFX_RetainPtr<CFX_DIBSource>& pSrc);
-
-  // CFX_DIBSource
-  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;
-
-  void TakeOver(CFX_RetainPtr<CFX_DIBitmap>&& pSrcBitmap);
-  bool ConvertFormat(FXDIB_Format format);
-  void Clear(uint32_t color);
-
-  uint32_t GetPixel(int x, int y) const;
-  void SetPixel(int x, int y, uint32_t color);
-
-  bool LoadChannel(FXDIB_Channel destChannel,
-                   const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap,
-                   FXDIB_Channel srcChannel);
-  bool LoadChannel(FXDIB_Channel destChannel, int value);
-
-  bool MultiplyAlpha(int alpha);
-  bool MultiplyAlpha(const CFX_RetainPtr<CFX_DIBSource>& pAlphaMask);
-
-  bool TransferBitmap(int dest_left,
-                      int dest_top,
-                      int width,
-                      int height,
-                      const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap,
-                      int src_left,
-                      int src_top);
-
-  bool CompositeBitmap(int dest_left,
-                       int dest_top,
-                       int width,
-                       int height,
-                       const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap,
-                       int src_left,
-                       int src_top,
-                       int blend_type = FXDIB_BLEND_NORMAL,
-                       const CFX_ClipRgn* pClipRgn = nullptr,
-                       bool bRgbByteOrder = false,
-                       void* pIccTransform = nullptr);
-
-  bool TransferMask(int dest_left,
-                    int dest_top,
-                    int width,
-                    int height,
-                    const CFX_RetainPtr<CFX_DIBSource>& pMask,
-                    uint32_t color,
-                    int src_left,
-                    int src_top,
-                    int alpha_flag = 0,
-                    void* pIccTransform = nullptr);
-
-  bool CompositeMask(int dest_left,
-                     int dest_top,
-                     int width,
-                     int height,
-                     const CFX_RetainPtr<CFX_DIBSource>& pMask,
-                     uint32_t color,
-                     int src_left,
-                     int src_top,
-                     int blend_type = FXDIB_BLEND_NORMAL,
-                     const CFX_ClipRgn* pClipRgn = nullptr,
-                     bool bRgbByteOrder = false,
-                     int alpha_flag = 0,
-                     void* pIccTransform = nullptr);
-
-  bool CompositeRect(int dest_left,
-                     int dest_top,
-                     int width,
-                     int height,
-                     uint32_t color,
-                     int alpha_flag = 0,
-                     void* pIccTransform = nullptr);
-
-  bool ConvertColorScale(uint32_t forecolor, uint32_t backcolor);
-
-#if defined _SKIA_SUPPORT_ || _SKIA_SUPPORT_PATHS_
-  void PreMultiply();
-#endif
-#if defined _SKIA_SUPPORT_PATHS_
-  void UnPreMultiply();
-#endif
-
- protected:
-  CFX_DIBitmap();
-  CFX_DIBitmap(const CFX_DIBitmap& src);
-  bool GetGrayData(void* pIccTransform = nullptr);
-
-#if defined _SKIA_SUPPORT_PATHS_
-  enum class Format { kCleared, kPreMultiplied, kUnPreMultiplied };
-#endif
-
-  uint8_t* m_pBuffer;
-#if defined _SKIA_SUPPORT_PATHS_
-  Format m_nFormat;
-#endif
-  bool m_bExtBuf;
-};
-
 class CFX_DIBExtractor {
  public:
   explicit CFX_DIBExtractor(const CFX_RetainPtr<CFX_DIBSource>& pSrc);
@@ -403,41 +128,6 @@ class CFX_DIBExtractor {
   CFX_RetainPtr<CFX_DIBitmap> m_pBitmap;
 };
 
-class CFX_FilteredDIB : public CFX_DIBSource {
- public:
-  template <typename T, typename... Args>
-  friend CFX_RetainPtr<T> pdfium::MakeRetain(Args&&... args);
-
-  ~CFX_FilteredDIB() override;
-
-  virtual FXDIB_Format GetDestFormat() = 0;
-  virtual uint32_t* GetDestPalette() = 0;
-  virtual void TranslateScanline(const uint8_t* src_buf,
-                                 std::vector<uint8_t>* dest_buf) const = 0;
-  virtual void TranslateDownSamples(uint8_t* dest_buf,
-                                    const uint8_t* src_buf,
-                                    int pixels,
-                                    int Bpp) const = 0;
-
-  void LoadSrc(const CFX_RetainPtr<CFX_DIBSource>& pSrc);
-
- protected:
-  CFX_FilteredDIB();
-
-  // CFX_DIBSource
-  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;
-
-  CFX_RetainPtr<CFX_DIBSource> m_pSrc;
-  mutable std::vector<uint8_t> m_Scanline;
-};
-
 class IFX_ScanlineComposer {
  public:
   virtual ~IFX_ScanlineComposer() {}