text: // Copyright 2016 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_FXGE_CFX_RENDERDEVICE_H_
  #define CORE_FXGE_CFX_RENDERDEVICE_H_
  
  #include <memory>
  
  #include "core/fxcrt/unowned_ptr.h"
  #include "core/fxge/cfx_color.h"
  #include "core/fxge/fx_dib.h"
  #include "core/fxge/fx_font.h"
  
  class CFX_Font;
  class CFX_GraphStateData;
  class CFX_ImageRenderer;
  class IFX_RenderDeviceDriver;
  
  #define FXDC_DEVICE_CLASS 1
  #define FXDC_PIXEL_WIDTH 2
  #define FXDC_PIXEL_HEIGHT 3
  #define FXDC_BITS_PIXEL 4
  #define FXDC_HORZ_SIZE 5
  #define FXDC_VERT_SIZE 6
  #define FXDC_RENDER_CAPS 7
  #define FXDC_DISPLAY 1
  #define FXDC_PRINTER 2
  
  #define FXRC_GET_BITS 0x01
  #define FXRC_BIT_MASK 0x02
  #define FXRC_ALPHA_PATH 0x10
  #define FXRC_ALPHA_IMAGE 0x20
  #define FXRC_ALPHA_OUTPUT 0x40
  #define FXRC_BLEND_MODE 0x80
  #define FXRC_SOFT_CLIP 0x100
  #define FXRC_CMYK_OUTPUT 0x200
  #define FXRC_BITMASK_OUTPUT 0x400
  #define FXRC_BYTEMASK_OUTPUT 0x800
  #define FXRENDER_IMAGE_LOSSY 0x1000
  #define FXRC_FILLSTROKE_PATH 0x2000
  #define FXRC_SHADING 0x4000
  
  #define FXFILL_ALTERNATE 1
  #define FXFILL_WINDING 2
  #define FXFILL_FULLCOVER 4
  #define FXFILL_RECT_AA 8
  #define FX_FILL_STROKE 16
  #define FX_STROKE_ADJUST 32
  #define FX_STROKE_TEXT_MODE 64
  #define FX_FILL_TEXT_MODE 128
  #define FX_ZEROAREA_FILL 256
  #define FXFILL_NOPATHSMOOTH 512
  
  #define FXTEXT_CLEARTYPE 0x01
  #define FXTEXT_BGR_STRIPE 0x02
  #define FXTEXT_PRINTGRAPHICTEXT 0x04
  #define FXTEXT_NO_NATIVETEXT 0x08
  #define FXTEXT_PRINTIMAGETEXT 0x10
  #define FXTEXT_NOSMOOTH 0x20
  
  class CFX_PathData;
  
  enum class FXPT_TYPE : uint8_t { LineTo, BezierTo, MoveTo };
  
  class FXTEXT_CHARPOS {
   public:
    FXTEXT_CHARPOS();
    FXTEXT_CHARPOS(const FXTEXT_CHARPOS&);
    ~FXTEXT_CHARPOS();
  
    float m_AdjustMatrix[4];
    CFX_PointF m_Origin;
    uint32_t m_Unicode;
    uint32_t m_GlyphIndex;
    int32_t m_FontCharWidth;
  #if _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
    uint32_t m_ExtGID;
  #endif
    int32_t m_FallbackFontPosition;
    bool m_bGlyphAdjust;
    bool m_bFontStyle;
  };
  
  class CFX_RenderDevice {
   public:
    class StateRestorer {
     public:
      explicit StateRestorer(CFX_RenderDevice* pDevice);
      ~StateRestorer();
  
     private:
      UnownedPtr<CFX_RenderDevice> m_pDevice;
    };
  
    CFX_RenderDevice();
    virtual ~CFX_RenderDevice();
  
    // Take ownership of |pDriver|.
    void SetDeviceDriver(std::unique_ptr<IFX_RenderDeviceDriver> pDriver);
    IFX_RenderDeviceDriver* GetDeviceDriver() const {
      return m_pDeviceDriver.get();
    }
  
    void SaveState();
    void RestoreState(bool bKeepSaved);
  
    int GetWidth() const { return m_Width; }
    int GetHeight() const { return m_Height; }
    int GetDeviceClass() const { return m_DeviceClass; }
    int GetRenderCaps() const { return m_RenderCaps; }
    int GetDeviceCaps(int id) const;
    CFX_Matrix GetCTM() const;
    RetainPtr<CFX_DIBitmap> GetBitmap() const { return m_pBitmap; }
    void SetBitmap(const RetainPtr<CFX_DIBitmap>& pBitmap) {
      m_pBitmap = pBitmap;
    }
    bool CreateCompatibleBitmap(const RetainPtr<CFX_DIBitmap>& pDIB,
                                int width,
                                int height) const;
    const FX_RECT& GetClipBox() const { return m_ClipBox; }
    bool SetClip_PathFill(const CFX_PathData* pPathData,
                          const CFX_Matrix* pObject2Device,
                          int fill_mode);
    bool SetClip_Rect(const CFX_RectF& pRect);
    bool SetClip_Rect(const FX_RECT& pRect);
    bool SetClip_PathStroke(const CFX_PathData* pPathData,
                            const CFX_Matrix* pObject2Device,
                            const CFX_GraphStateData* pGraphState);
    bool DrawPath(const CFX_PathData* pPathData,
                  const CFX_Matrix* pObject2Device,
                  const CFX_GraphStateData* pGraphState,
                  uint32_t fill_color,
                  uint32_t stroke_color,
                  int fill_mode) {
      return DrawPathWithBlend(pPathData, pObject2Device, pGraphState, fill_color,
                               stroke_color, fill_mode, FXDIB_BLEND_NORMAL);
    }
    bool DrawPathWithBlend(const CFX_PathData* pPathData,
                           const CFX_Matrix* pObject2Device,
                           const CFX_GraphStateData* pGraphState,
                           uint32_t fill_color,
                           uint32_t stroke_color,
                           int fill_mode,
                           int blend_type);
    bool FillRect(const FX_RECT* pRect, uint32_t color) {
      return FillRectWithBlend(pRect, color, FXDIB_BLEND_NORMAL);
    }
  
    RetainPtr<CFX_DIBitmap> GetBackDrop();
    bool GetDIBits(const RetainPtr<CFX_DIBitmap>& pBitmap, int left, int top);
    bool SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap, int left, int top) {
      return SetDIBitsWithBlend(pBitmap, left, top, FXDIB_BLEND_NORMAL);
    }
    bool SetDIBitsWithBlend(const RetainPtr<CFX_DIBSource>& pBitmap,
                            int left,
                            int top,
                            int blend_type);
    bool StretchDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
                       int left,
                       int top,
                       int dest_width,
                       int dest_height) {
      return StretchDIBitsWithFlagsAndBlend(pBitmap, left, top, dest_width,
                                            dest_height, 0, FXDIB_BLEND_NORMAL);
    }
    bool StretchDIBitsWithFlagsAndBlend(const RetainPtr<CFX_DIBSource>& pBitmap,
                                        int left,
                                        int top,
                                        int dest_width,
                                        int dest_height,
                                        uint32_t flags,
                                        int blend_type);
    bool SetBitMask(const RetainPtr<CFX_DIBSource>& pBitmap,
                    int left,
                    int top,
                    uint32_t color);
    bool StretchBitMask(const RetainPtr<CFX_DIBSource>& pBitmap,
                        int left,
                        int top,
                        int dest_width,
                        int dest_height,
                        uint32_t color);
    bool StretchBitMaskWithFlags(const RetainPtr<CFX_DIBSource>& pBitmap,
                                 int left,
                                 int top,
                                 int dest_width,
                                 int dest_height,
                                 uint32_t color,
                                 uint32_t flags);
    bool StartDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
                     int bitmap_alpha,
                     uint32_t color,
                     const CFX_Matrix* pMatrix,
                     uint32_t flags,
                     std::unique_ptr<CFX_ImageRenderer>* handle) {
      return StartDIBitsWithBlend(pBitmap, bitmap_alpha, color, pMatrix, flags,
                                  handle, FXDIB_BLEND_NORMAL);
    }
    bool StartDIBitsWithBlend(const RetainPtr<CFX_DIBSource>& pBitmap,
                              int bitmap_alpha,
                              uint32_t color,
                              const CFX_Matrix* pMatrix,
                              uint32_t flags,
                              std::unique_ptr<CFX_ImageRenderer>* handle,
                              int blend_type);
    bool ContinueDIBits(CFX_ImageRenderer* handle, IFX_PauseIndicator* pPause);
  
    bool DrawNormalText(int nChars,
                        const FXTEXT_CHARPOS* pCharPos,
                        CFX_Font* pFont,
                        float font_size,
                        const CFX_Matrix* pText2Device,
                        uint32_t fill_color,
                        uint32_t text_flags);
    bool DrawTextPath(int nChars,
                      const FXTEXT_CHARPOS* pCharPos,
                      CFX_Font* pFont,
                      float font_size,
                      const CFX_Matrix* pText2User,
                      const CFX_Matrix* pUser2Device,
                      const CFX_GraphStateData* pGraphState,
                      uint32_t fill_color,
                      uint32_t stroke_color,
                      CFX_PathData* pClippingPath,
                      int nFlag);
  
    void DrawFillRect(const CFX_Matrix* pUser2Device,
                      const CFX_FloatRect& rect,
                      const CFX_Color& color,
                      int32_t nTransparency);
    void DrawFillRect(const CFX_Matrix* pUser2Device,
                      const CFX_FloatRect& rect,
                      const FX_COLORREF& color);
    void DrawStrokeRect(const CFX_Matrix* pUser2Device,
                        const CFX_FloatRect& rect,
                        const FX_COLORREF& color,
                        float fWidth);
    void DrawStrokeLine(const CFX_Matrix* pUser2Device,
                        const CFX_PointF& ptMoveTo,
                        const CFX_PointF& ptLineTo,
                        const FX_COLORREF& color,
                        float fWidth);
    void DrawBorder(const CFX_Matrix* pUser2Device,
                    const CFX_FloatRect& rect,
                    float fWidth,
                    const CFX_Color& color,
                    const CFX_Color& crLeftTop,
                    const CFX_Color& crRightBottom,
                    BorderStyle nStyle,
                    int32_t nTransparency);
    void DrawFillArea(const CFX_Matrix* pUser2Device,
                      const CFX_PointF* pPts,
                      int32_t nCount,
                      const FX_COLORREF& color);
    void DrawShadow(const CFX_Matrix* pUser2Device,
                    bool bVertical,
                    bool bHorizontal,
                    CFX_FloatRect rect,
                    int32_t nTransparency,
                    int32_t nStartGray,
                    int32_t nEndGray);
  
  #ifdef _SKIA_SUPPORT_
    virtual void DebugVerifyBitmapIsPreMultiplied() const;
    virtual bool SetBitsWithMask(const RetainPtr<CFX_DIBSource>& pBitmap,
                                 const RetainPtr<CFX_DIBSource>& pMask,
                                 int left,
                                 int top,
                                 int bitmap_alpha,
                                 int blend_type);
  #endif
  #if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_
    void Flush(bool release);
  #endif
  
   private:
    void InitDeviceInfo();
    void UpdateClipBox();
    bool DrawFillStrokePath(const CFX_PathData* pPathData,
                            const CFX_Matrix* pObject2Device,
                            const CFX_GraphStateData* pGraphState,
                            uint32_t fill_color,
                            uint32_t stroke_color,
                            int fill_mode,
                            int blend_type);
    bool DrawCosmeticLine(const CFX_PointF& ptMoveTo,
                          const CFX_PointF& ptLineTo,
                          uint32_t color,
                          int fill_mode,
                          int blend_type);
    bool FillRectWithBlend(const FX_RECT* pRect, uint32_t color, int blend_type);
  
    RetainPtr<CFX_DIBitmap> m_pBitmap;
    int m_Width;
    int m_Height;
    int m_bpp;
    int m_RenderCaps;
    int m_DeviceClass;
    FX_RECT m_ClipBox;
    std::unique_ptr<IFX_RenderDeviceDriver> m_pDeviceDriver;
  };
  
  #endif  // CORE_FXGE_CFX_RENDERDEVICE_H_
  