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 "SkBitmap.h"
12#include "SkColor.h"
13#include "SkMask.h"
14
15class SkBlitMask {
16public:
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 SkBitmap& 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)(void* dst, const void* mask,
48                            const SkPMColor* src, int width);
49
50    /**
51     *  Public entry-point to return a blitmask ColorProc.
52     *  May return NULL if config or format are not supported.
53     */
54    static ColorProc ColorFactory(SkBitmap::Config, SkMask::Format, SkColor);
55
56    /**
57     *  Return either platform specific optimized blitmask ColorProc,
58     *  or NULL if no optimized routine is available.
59     */
60    static ColorProc PlatformColorProcs(SkBitmap::Config, SkMask::Format, SkColor);
61
62    /**
63     *  Public entry-point to return a blitcolor BlitLCD16RowProc.
64     */
65    static BlitLCD16RowProc BlitLCD16RowFactory(bool isOpaque);
66
67    /**
68     *  Return either platform specific optimized blitcolor BlitLCD16RowProc,
69     *  or NULL if no optimized routine is available.
70     */
71    static BlitLCD16RowProc PlatformBlitRowProcs16(bool isOpaque);
72
73    enum RowFlags {
74        kSrcIsOpaque_RowFlag    = 1 << 0
75    };
76
77    /**
78     *  Public entry-point to return a blitmask RowProc.
79     *  May return NULL if config or format are not supported.
80     */
81    static RowProc RowFactory(SkBitmap::Config, SkMask::Format, RowFlags);
82
83    /**
84     *  Return either platform specific optimized blitmask RowProc,
85     *  or NULL if no optimized routine is available.
86     */
87    static RowProc PlatformRowProcs(SkBitmap::Config, SkMask::Format, RowFlags);
88};
89
90#endif
91