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 XFA_FXGRAPHICS_CFX_GRAPHICS_H_
  #define XFA_FXGRAPHICS_CFX_GRAPHICS_H_
  
  #include <memory>
  
  #include "core/fxcrt/fx_system.h"
  #include "core/fxge/cfx_fxgedevice.h"
  #include "core/fxge/cfx_graphstatedata.h"
  #include "core/fxge/cfx_renderdevice.h"
  #include "core/fxge/fx_dib.h"
  #include "core/fxge/fx_font.h"
  #include "xfa/fwl/core/fwl_error.h"
  
  class CFX_Color;
  class CFX_Path;
  class CAGG_Graphics;
  
  using FX_DeviceCap = int32_t;
  using FX_FillMode = int32_t;
  
  enum FX_DashStyle {
    FX_DASHSTYLE_Solid = 0,
    FX_DASHSTYLE_Dash = 1,
    FX_DASHSTYLE_Dot = 2,
    FX_DASHSTYLE_DashDot = 3,
    FX_DASHSTYLE_DashDotDot = 4
  };
  
  enum FX_StrokeAlignment {
    FX_STROKEALIGNMENT_Center = 0,
    FX_STROKEALIGNMENT_Inset = 1,
    FX_STROKEALIGNMENT_Outset = 2,
    FX_STROKEALIGNMENT_Left = 3,
    FX_STROKEALIGNMENT_Right = 4
  };
  
  enum FX_HatchStyle {
    FX_HATCHSTYLE_Horizontal = 0,
    FX_HATCHSTYLE_Vertical = 1,
    FX_HATCHSTYLE_ForwardDiagonal = 2,
    FX_HATCHSTYLE_BackwardDiagonal = 3,
    FX_HATCHSTYLE_Cross = 4,
    FX_HATCHSTYLE_DiagonalCross = 5,
    FX_HATCHSTYLE_05Percent = 6,
    FX_HATCHSTYLE_10Percent = 7,
    FX_HATCHSTYLE_20Percent = 8,
    FX_HATCHSTYLE_25Percent = 9,
    FX_HATCHSTYLE_30Percent = 10,
    FX_HATCHSTYLE_40Percent = 11,
    FX_HATCHSTYLE_50Percent = 12,
    FX_HATCHSTYLE_60Percent = 13,
    FX_HATCHSTYLE_70Percent = 14,
    FX_HATCHSTYLE_75Percent = 15,
    FX_HATCHSTYLE_80Percent = 16,
    FX_HATCHSTYLE_90Percent = 17,
    FX_HATCHSTYLE_LightDownwardDiagonal = 18,
    FX_HATCHSTYLE_LightUpwardDiagonal = 19,
    FX_HATCHSTYLE_DarkDownwardDiagonal = 20,
    FX_HATCHSTYLE_DarkUpwardDiagonal = 21,
    FX_HATCHSTYLE_WideDownwardDiagonal = 22,
    FX_HATCHSTYLE_WideUpwardDiagonal = 23,
    FX_HATCHSTYLE_LightVertical = 24,
    FX_HATCHSTYLE_LightHorizontal = 25,
    FX_HATCHSTYLE_NarrowVertical = 26,
    FX_HATCHSTYLE_NarrowHorizontal = 27,
    FX_HATCHSTYLE_DarkVertical = 28,
    FX_HATCHSTYLE_DarkHorizontal = 29,
    FX_HATCHSTYLE_DashedDownwardDiagonal = 30,
    FX_HATCHSTYLE_DashedUpwardDiagonal = 31,
    FX_HATCHSTYLE_DashedHorizontal = 32,
    FX_HATCHSTYLE_DashedVertical = 33,
    FX_HATCHSTYLE_SmallConfetti = 34,
    FX_HATCHSTYLE_LargeConfetti = 35,
    FX_HATCHSTYLE_ZigZag = 36,
    FX_HATCHSTYLE_Wave = 37,
    FX_HATCHSTYLE_DiagonalBrick = 38,
    FX_HATCHSTYLE_HorizontalBrick = 39,
    FX_HATCHSTYLE_Weave = 40,
    FX_HATCHSTYLE_Plaid = 41,
    FX_HATCHSTYLE_Divot = 42,
    FX_HATCHSTYLE_DottedGrid = 43,
    FX_HATCHSTYLE_DottedDiamond = 44,
    FX_HATCHSTYLE_Shingle = 45,
    FX_HATCHSTYLE_Trellis = 46,
    FX_HATCHSTYLE_Sphere = 47,
    FX_HATCHSTYLE_SmallGrid = 48,
    FX_HATCHSTYLE_SmallCheckerBoard = 49,
    FX_HATCHSTYLE_LargeCheckerBoard = 50,
    FX_HATCHSTYLE_OutlinedDiamond = 51,
    FX_HATCHSTYLE_SolidDiamond = 52
  };
  
  class CFX_RenderDevice;
  
  class CFX_Graphics {
   public:
    CFX_Graphics();
    virtual ~CFX_Graphics();
  
    FWL_Error Create(CFX_RenderDevice* renderDevice,
                     FX_BOOL isAntialiasing = TRUE);
    FWL_Error Create(int32_t width,
                     int32_t height,
                     FXDIB_Format format,
                     FX_BOOL isNative = TRUE,
                     FX_BOOL isAntialiasing = TRUE);
  
    FWL_Error GetDeviceCap(const int32_t capID, FX_DeviceCap& capVal);
    FWL_Error IsPrinterDevice(FX_BOOL& isPrinter);
    FWL_Error EnableAntialiasing(FX_BOOL isAntialiasing);
  
    FWL_Error SaveGraphState();
    FWL_Error RestoreGraphState();
  
    FWL_Error GetLineCap(CFX_GraphStateData::LineCap& lineCap) const;
    FWL_Error GetDashCount(int32_t& dashCount) const;
    FWL_Error GetLineDash(FX_FLOAT& dashPhase, FX_FLOAT* dashArray) const;
    FWL_Error GetLineJoin(CFX_GraphStateData::LineJoin& lineJoin) const;
    FWL_Error GetMiterLimit(FX_FLOAT& miterLimit) const;
    FWL_Error GetLineWidth(FX_FLOAT& lineWidth) const;
    FWL_Error GetStrokeAlignment(FX_StrokeAlignment& strokeAlignment) const;
    FWL_Error GetClipRect(CFX_RectF& rect) const;
    CFX_Matrix* GetMatrix();
    CFX_RenderDevice* GetRenderDevice();
  
    FWL_Error SetLineCap(CFX_GraphStateData::LineCap lineCap);
    FWL_Error SetLineDash(FX_FLOAT dashPhase,
                          FX_FLOAT* dashArray,
                          int32_t dashCount);
    FWL_Error SetLineDash(FX_DashStyle dashStyle);
    FWL_Error SetLineJoin(CFX_GraphStateData::LineJoin lineJoin);
    FWL_Error SetMiterLimit(FX_FLOAT miterLimit);
    FWL_Error SetLineWidth(FX_FLOAT lineWidth, FX_BOOL isActOnDash = FALSE);
    FWL_Error SetStrokeAlignment(FX_StrokeAlignment strokeAlignment);
    FWL_Error SetStrokeColor(CFX_Color* color);
    FWL_Error SetFillColor(CFX_Color* color);
    FWL_Error SetClipRect(const CFX_RectF& rect);
    FWL_Error SetFont(CFX_Font* font);
    FWL_Error SetFontSize(const FX_FLOAT size);
    FWL_Error SetFontHScale(const FX_FLOAT scale);
    FWL_Error SetCharSpacing(const FX_FLOAT spacing);
    FWL_Error SetTextDrawingMode(const int32_t mode);
  
    FWL_Error StrokePath(CFX_Path* path, CFX_Matrix* matrix = nullptr);
    FWL_Error FillPath(CFX_Path* path,
                       FX_FillMode fillMode = FXFILL_WINDING,
                       CFX_Matrix* matrix = nullptr);
    FWL_Error ClipPath(CFX_Path* path,
                       FX_FillMode fillMode = FXFILL_WINDING,
                       CFX_Matrix* matrix = nullptr);
    FWL_Error DrawImage(CFX_DIBSource* source,
                        const CFX_PointF& point,
                        CFX_Matrix* matrix = nullptr);
    FWL_Error StretchImage(CFX_DIBSource* source,
                           const CFX_RectF& rect,
                           CFX_Matrix* matrix = nullptr);
    FWL_Error ConcatMatrix(const CFX_Matrix* matrix);
    FWL_Error ClearClip();
    FWL_Error ShowText(const CFX_PointF& point,
                       const CFX_WideString& text,
                       CFX_Matrix* matrix = nullptr);
    FWL_Error CalcTextRect(CFX_RectF& rect,
                           const CFX_WideString& text,
                           FX_BOOL isMultiline = FALSE,
                           CFX_Matrix* matrix = nullptr);
    FWL_Error Transfer(CFX_Graphics* graphics, const CFX_Matrix* matrix);
    FWL_Error Transfer(CFX_Graphics* graphics,
                       FX_FLOAT srcLeft,
                       FX_FLOAT srcTop,
                       const CFX_RectF& dstRect,
                       const CFX_Matrix* matrix);
  
    FWL_Error InverseRect(const CFX_RectF& rect);
    FWL_Error XorDIBitmap(const CFX_DIBitmap* srcBitmap, const CFX_RectF& rect);
    FWL_Error EqvDIBitmap(const CFX_DIBitmap* srcBitmap, const CFX_RectF& rect);
  
   protected:
    int32_t m_type;
  
   private:
    struct TInfo {
      TInfo();
      explicit TInfo(const TInfo& info);
      TInfo& operator=(const TInfo& other);
  
      CFX_GraphStateData graphState;
      FX_BOOL isAntialiasing;
      FX_StrokeAlignment strokeAlignment;
      CFX_Matrix CTM;
      FX_BOOL isActOnDash;
      CFX_Color* strokeColor;
      CFX_Color* fillColor;
      CFX_Font* font;
      FX_FLOAT fontSize;
      FX_FLOAT fontHScale;
      FX_FLOAT fontSpacing;
    } m_info;
  
    FWL_Error RenderDeviceSetLineDash(FX_DashStyle dashStyle);
    FWL_Error RenderDeviceStrokePath(CFX_Path* path, CFX_Matrix* matrix);
    FWL_Error RenderDeviceFillPath(CFX_Path* path,
                                   FX_FillMode fillMode,
                                   CFX_Matrix* matrix);
    FWL_Error RenderDeviceDrawImage(CFX_DIBSource* source,
                                    const CFX_PointF& point,
                                    CFX_Matrix* matrix);
    FWL_Error RenderDeviceStretchImage(CFX_DIBSource* source,
                                       const CFX_RectF& rect,
                                       CFX_Matrix* matrix);
    FWL_Error RenderDeviceShowText(const CFX_PointF& point,
                                   const CFX_WideString& text,
                                   CFX_Matrix* matrix);
  
    FWL_Error StrokePathWithPattern(CFX_Path* path, CFX_Matrix* matrix);
    FWL_Error StrokePathWithShading(CFX_Path* path, CFX_Matrix* matrix);
  
    FWL_Error FillPathWithPattern(CFX_Path* path,
                                  FX_FillMode fillMode,
                                  CFX_Matrix* matrix);
    FWL_Error FillPathWithShading(CFX_Path* path,
                                  FX_FillMode fillMode,
                                  CFX_Matrix* matrix);
  
    FWL_Error SetDIBitsWithMatrix(CFX_DIBSource* source, CFX_Matrix* matrix);
    FWL_Error CalcTextInfo(const CFX_WideString& text,
                           uint32_t* charCodes,
                           FXTEXT_CHARPOS* charPos,
                           CFX_RectF& rect);
  
    CFX_RenderDevice* m_renderDevice;
    CFX_ArrayTemplate<TInfo*> m_infoStack;
    std::unique_ptr<CAGG_Graphics> m_aggGraphics;
    friend class CAGG_Graphics;
  };
  
  #endif  // XFA_FXGRAPHICS_CFX_GRAPHICS_H_
  