core/src/fxge/skia/fx_skia_device.h

// Copyright 2014 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.

#ifndef CORE_SRC_FXGE_SKIA_FX_SKIA_DEVICE_H_
#define CORE_SRC_FXGE_SKIA_FX_SKIA_DEVICE_H_

#if defined(_SKIA_SUPPORT_)
class CFX_SkiaDeviceDriver : public IFX_RenderDeviceDriver {
 public:
  CFX_SkiaDeviceDriver(CFX_DIBitmap* pBitmap,
                       int dither_bits,
                       FX_BOOL bRgbByteOrder,
                       CFX_DIBitmap* pOriDevice,
                       FX_BOOL bGroupKnockout);
  ~CFX_SkiaDeviceDriver() override;

  /** Options */
  virtual int GetDeviceCaps(int caps_id);

  /** Save and restore all graphic states */
  virtual void SaveState();
  virtual void RestoreState(FX_BOOL bKeepSaved);

  /** Set clipping path using filled region */
  virtual FX_BOOL SetClip_PathFill(
      const CFX_PathData* pPathData,     // path info
      const CFX_Matrix* pObject2Device,  // optional transformation
      int fill_mode                      // fill mode, WINDING or ALTERNATE
      );

  /** Set clipping path using stroked region */
  virtual FX_BOOL SetClip_PathStroke(
      const CFX_PathData* pPathData,     // path info
      const CFX_Matrix* pObject2Device,  // optional transformation
      const CFX_GraphStateData*
          pGraphState  // graphic state, for pen attributes
      );

  /** Draw a path */
  virtual FX_BOOL DrawPath(const CFX_PathData* pPathData,
                           const CFX_Matrix* pObject2Device,
                           const CFX_GraphStateData* pGraphState,
                           FX_DWORD fill_color,
                           FX_DWORD stroke_color,
                           int fill_mode,
                           int alpha_flag = 0,
                           void* pIccTransform = NULL);

  virtual FX_BOOL SetPixel(int x,
                           int y,
                           FX_DWORD color,
                           int alpha_flag = 0,
                           void* pIccTransform = NULL);

  virtual FX_BOOL FillRect(const FX_RECT* pRect,
                           FX_DWORD fill_color,
                           int alpha_flag = 0,
                           void* pIccTransform = NULL);

  /** Draw a single pixel (device dependant) line */
  virtual FX_BOOL DrawCosmeticLine(FX_FIXFLOAT x1,
                                   FX_FIXFLOAT y1,
                                   FX_FIXFLOAT x2,
                                   FX_FIXFLOAT y2,
                                   FX_DWORD color,
                                   int alpha_flag,
                                   void* pIccTransform,
                                   int blend_type) {
    return FALSE;
  }

  virtual FX_BOOL GetClipBox(FX_RECT* pRect);

  /** Load device buffer into a DIB */
  virtual FX_BOOL GetDIBits(CFX_DIBitmap* pBitmap,
                            int left,
                            int top,
                            void* pIccTransform = NULL,
                            FX_BOOL bDEdge = FALSE);

  virtual CFX_DIBitmap* GetBackDrop() { return m_pAggDriver->GetBackDrop(); }

  virtual FX_BOOL SetDIBits(const CFX_DIBSource* pBitmap,
                            FX_DWORD color,
                            const FX_RECT* pSrcRect,
                            int dest_left,
                            int dest_top,
                            int blend_type,
                            int alpha_flag = 0,
                            void* pIccTransform = NULL);
  virtual FX_BOOL StretchDIBits(const CFX_DIBSource* pBitmap,
                                FX_DWORD color,
                                int dest_left,
                                int dest_top,
                                int dest_width,
                                int dest_height,
                                const FX_RECT* pClipRect,
                                FX_DWORD flags,
                                int alpha_flag = 0,
                                void* pIccTransform = NULL);

  virtual FX_BOOL StartDIBits(const CFX_DIBSource* pBitmap,
                              int bitmap_alpha,
                              FX_DWORD color,
                              const CFX_Matrix* pMatrix,
                              FX_DWORD flags,
                              void*& handle,
                              int alpha_flag = 0,
                              void* pIccTransform = NULL);
  virtual FX_BOOL ContinueDIBits(void* handle, IFX_Pause* pPause);
  virtual void CancelDIBits(void* handle);

  virtual FX_BOOL DrawDeviceText(int nChars,
                                 const FXTEXT_CHARPOS* pCharPos,
                                 CFX_Font* pFont,
                                 CFX_FontCache* pCache,
                                 const CFX_Matrix* pObject2Device,
                                 FX_FIXFLOAT font_size,
                                 FX_DWORD color,
                                 int alpha_flag = 0,
                                 void* pIccTransform = NULL);

  virtual FX_BOOL RenderRasterizer(rasterizer_scanline_aa& rasterizer,
                                   FX_DWORD color,
                                   FX_BOOL bFullCover,
                                   FX_BOOL bGroupKnockout,
                                   int alpha_flag,
                                   void* pIccTransform);
  virtual FX_BOOL RenderRasterizerSkia(SkPath& skPath,
                                       const SkPaint& origPaint,
                                       SkIRect& rect,
                                       FX_DWORD color,
                                       FX_BOOL bFullCover,
                                       FX_BOOL bGroupKnockout,
                                       int alpha_flag,
                                       void* pIccTransform,
                                       FX_BOOL bFill = TRUE);
  void SetClipMask(rasterizer_scanline_aa& rasterizer);
  void SetClipMask(SkPath& skPath, SkPaint* spaint);
  virtual uint8_t* GetBuffer() const { return m_pAggDriver->GetBuffer(); }

  CFX_AggDeviceDriver* m_pAggDriver;
};
#endif  // defined(_SKIA_SUPPORT_)

#endif  // CORE_SRC_FXGE_SKIA_FX_SKIA_DEVICE_H_