1 /*
2  * Copyright 2011 Google Inc.
3  *
4  * Use of this source code is governed by a BSD-style license that can be
5  * found in the LICENSE file.
6  */
7 
8 #ifndef SkBlitMask_DEFINED
9 #define SkBlitMask_DEFINED
10 
11 #include "SkColor.h"
12 #include "SkMask.h"
13 #include "SkPixmap.h"
14 
15 class SkBlitMask {
16 public:
17     /**
18      *  Returns true if the device config and mask format were supported.
19      *  else return false (nothing was drawn)
20      */
21     static bool BlitColor(const SkPixmap& device, const SkMask& mask,
22                           const SkIRect& clip, SkColor color);
23 
24     /**
25      *  Function pointer that blits the mask into a device (dst) colorized
26      *  by color. The number of pixels to blit is specified by width and height,
27      *  but each scanline is offset by dstRB (rowbytes) and srcRB respectively.
28      */
29     typedef void (*ColorProc)(void* dst, size_t dstRB,
30                               const void* mask, size_t maskRB,
31                               SkColor color, int width, int height);
32 
33     /**
34      *  Function pointer that blits a row of mask(lcd16) into a row of dst
35      *  colorized by a single color. The number of pixels to blit is specified
36      *  by width.
37      */
38     typedef void (*BlitLCD16RowProc)(SkPMColor dst[], const uint16_t src[],
39                                      SkColor color, int width,
40                                      SkPMColor opaqueDst);
41 
42     /**
43      *  Function pointer that blits a row of src colors through a row of a mask
44      *  onto a row of dst colors. The RowFactory that returns this function ptr
45      *  will have been told the formats for the mask and the dst.
46      */
47     typedef void (*RowProc)(SkPMColor* dst, const void* mask,
48                             const SkPMColor* src, int width);
49 
50     /**
51      *  Public entry-point to return a blitcolor BlitLCD16RowProc.
52      */
53     static BlitLCD16RowProc BlitLCD16RowFactory(bool isOpaque);
54 
55     /**
56      *  Return either platform specific optimized blitcolor BlitLCD16RowProc,
57      *  or nullptr if no optimized routine is available.
58      */
59     static BlitLCD16RowProc PlatformBlitRowProcs16(bool isOpaque);
60 
61     enum RowFlags {
62         kSrcIsOpaque_RowFlag    = 1 << 0
63     };
64 
65     /**
66      *  Public entry-point to return a blitmask RowProc.
67      *  May return nullptr if config or format are not supported.
68      */
69     static RowProc RowFactory(SkColorType, SkMask::Format, RowFlags);
70 
71     /**
72      *  Return either platform specific optimized blitmask RowProc,
73      *  or nullptr if no optimized routine is available.
74      */
75     static RowProc PlatformRowProcs(SkColorType, SkMask::Format, RowFlags);
76 };
77 
78 #endif
79