1 // Copyright 2017 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 CORE_FXGE_DIB_CFX_SCANLINECOMPOSITOR_H_
8 #define CORE_FXGE_DIB_CFX_SCANLINECOMPOSITOR_H_
9 
10 #include <memory>
11 
12 #include "core/fxge/dib/cfx_dibsource.h"
13 
14 class CFX_ScanlineCompositor {
15  public:
16   CFX_ScanlineCompositor();
17 
18   ~CFX_ScanlineCompositor();
19 
20   bool Init(FXDIB_Format dest_format,
21             FXDIB_Format src_format,
22             int32_t width,
23             uint32_t* pSrcPalette,
24             uint32_t mask_color,
25             int blend_type,
26             bool bClip,
27             bool bRgbByteOrder,
28             int alpha_flag);
29 
30   void CompositeRgbBitmapLine(uint8_t* dest_scan,
31                               const uint8_t* src_scan,
32                               int width,
33                               const uint8_t* clip_scan,
34                               const uint8_t* src_extra_alpha,
35                               uint8_t* dst_extra_alpha);
36 
37   void CompositePalBitmapLine(uint8_t* dest_scan,
38                               const uint8_t* src_scan,
39                               int src_left,
40                               int width,
41                               const uint8_t* clip_scan,
42                               const uint8_t* src_extra_alpha,
43                               uint8_t* dst_extra_alpha);
44 
45   void CompositeByteMaskLine(uint8_t* dest_scan,
46                              const uint8_t* src_scan,
47                              int width,
48                              const uint8_t* clip_scan,
49                              uint8_t* dst_extra_alpha);
50 
51   void CompositeBitMaskLine(uint8_t* dest_scan,
52                             const uint8_t* src_scan,
53                             int src_left,
54                             int width,
55                             const uint8_t* clip_scan,
56                             uint8_t* dst_extra_alpha);
57 
58  private:
59   void InitSourcePalette(FXDIB_Format src_format,
60                          FXDIB_Format dest_format,
61                          const uint32_t* pSrcPalette);
62 
63   void InitSourceMask(int alpha_flag, uint32_t mask_color);
64 
65   int m_iTransparency;
66   FXDIB_Format m_SrcFormat;
67   FXDIB_Format m_DestFormat;
68   std::unique_ptr<uint32_t, FxFreeDeleter> m_pSrcPalette;
69   int m_MaskAlpha;
70   int m_MaskRed;
71   int m_MaskGreen;
72   int m_MaskBlue;
73   int m_BlendType;
74   bool m_bRgbByteOrder;
75 };
76 
77 #endif  // CORE_FXGE_DIB_CFX_SCANLINECOMPOSITOR_H_
78