1/*
2* Copyright 2015 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 SkTableColorFilter_DEFINED
9#define SkTableColorFilter_DEFINED
10
11#include "SkColorFilter.h"
12
13class SK_API SkTableColorFilter {
14public:
15    /**
16     *  Create a table colorfilter, copying the table into the filter, and
17     *  applying it to all 4 components.
18     *      a' = table[a];
19     *      r' = table[r];
20     *      g' = table[g];
21     *      b' = table[b];
22     *  Compoents are operated on in unpremultiplied space. If the incomming
23     *  colors are premultiplied, they are temporarily unpremultiplied, then
24     *  the table is applied, and then the result is remultiplied.
25     */
26    static sk_sp<SkColorFilter> Make(const uint8_t table[256]);
27
28    /**
29     *  Create a table colorfilter, with a different table for each
30     *  component [A, R, G, B]. If a given table is NULL, then it is
31     *  treated as identity, with the component left unchanged. If a table
32     *  is not null, then its contents are copied into the filter.
33     */
34    static sk_sp<SkColorFilter> MakeARGB(const uint8_t tableA[256],
35                                         const uint8_t tableR[256],
36                                         const uint8_t tableG[256],
37                                         const uint8_t tableB[256]);
38
39    SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP()
40};
41
42#endif
43