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      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 XFA_FXGRAPHICS_CFX_GRAPHICS_H_
      8 #define XFA_FXGRAPHICS_CFX_GRAPHICS_H_
      9 
     10 #include <memory>
     11 #include <vector>
     12 
     13 #include "core/fxcrt/fx_system.h"
     14 #include "core/fxge/cfx_fxgedevice.h"
     15 #include "core/fxge/cfx_graphstatedata.h"
     16 #include "core/fxge/cfx_renderdevice.h"
     17 #include "core/fxge/fx_dib.h"
     18 #include "core/fxge/fx_font.h"
     19 
     20 class CFX_Color;
     21 class CFX_Path;
     22 
     23 using FX_FillMode = int32_t;
     24 
     25 enum FX_DashStyle {
     26   FX_DASHSTYLE_Solid = 0,
     27   FX_DASHSTYLE_Dash = 1,
     28   FX_DASHSTYLE_Dot = 2,
     29   FX_DASHSTYLE_DashDot = 3,
     30   FX_DASHSTYLE_DashDotDot = 4
     31 };
     32 
     33 enum class FX_HatchStyle {
     34   Horizontal = 0,
     35   Vertical = 1,
     36   ForwardDiagonal = 2,
     37   BackwardDiagonal = 3,
     38   Cross = 4,
     39   DiagonalCross = 5
     40 };
     41 
     42 class CFX_RenderDevice;
     43 
     44 class CFX_Graphics {
     45  public:
     46   explicit CFX_Graphics(CFX_RenderDevice* renderDevice);
     47   ~CFX_Graphics();
     48 
     49   void SaveGraphState();
     50   void RestoreGraphState();
     51 
     52   CFX_RectF GetClipRect() const;
     53   CFX_Matrix* GetMatrix();
     54   CFX_RenderDevice* GetRenderDevice();
     55 
     56   void SetLineCap(CFX_GraphStateData::LineCap lineCap);
     57   void SetLineDash(FX_FLOAT dashPhase, FX_FLOAT* dashArray, int32_t dashCount);
     58   void SetLineDash(FX_DashStyle dashStyle);
     59   void SetLineWidth(FX_FLOAT lineWidth, bool isActOnDash = false);
     60   void SetStrokeColor(CFX_Color* color);
     61   void SetFillColor(CFX_Color* color);
     62   void SetClipRect(const CFX_RectF& rect);
     63   void StrokePath(CFX_Path* path, CFX_Matrix* matrix = nullptr);
     64   void FillPath(CFX_Path* path,
     65                 FX_FillMode fillMode = FXFILL_WINDING,
     66                 CFX_Matrix* matrix = nullptr);
     67   void StretchImage(CFX_DIBSource* source,
     68                     const CFX_RectF& rect,
     69                     CFX_Matrix* matrix = nullptr);
     70   void ConcatMatrix(const CFX_Matrix* matrix);
     71 
     72  protected:
     73   int32_t m_type;
     74 
     75  private:
     76   struct TInfo {
     77     TInfo();
     78     explicit TInfo(const TInfo& info);
     79     TInfo& operator=(const TInfo& other);
     80 
     81     CFX_GraphStateData graphState;
     82     CFX_Matrix CTM;
     83     bool isActOnDash;
     84     CFX_Color* strokeColor;
     85     CFX_Color* fillColor;
     86   } m_info;
     87 
     88   void RenderDeviceSetLineDash(FX_DashStyle dashStyle);
     89   void RenderDeviceStrokePath(CFX_Path* path, CFX_Matrix* matrix);
     90   void RenderDeviceFillPath(CFX_Path* path,
     91                             FX_FillMode fillMode,
     92                             CFX_Matrix* matrix);
     93   void RenderDeviceStretchImage(CFX_DIBSource* source,
     94                                 const CFX_RectF& rect,
     95                                 CFX_Matrix* matrix);
     96 
     97   void FillPathWithPattern(CFX_Path* path,
     98                            FX_FillMode fillMode,
     99                            CFX_Matrix* matrix);
    100   void FillPathWithShading(CFX_Path* path,
    101                            FX_FillMode fillMode,
    102                            CFX_Matrix* matrix);
    103 
    104   void SetDIBitsWithMatrix(CFX_DIBSource* source, CFX_Matrix* matrix);
    105 
    106   CFX_RenderDevice* m_renderDevice;
    107   std::vector<std::unique_ptr<TInfo>> m_infoStack;
    108 };
    109 
    110 #endif  // XFA_FXGRAPHICS_CFX_GRAPHICS_H_
    111