ColorFilterTest.cpp revision ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976e 
1
2/*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8#include "Test.h"
9#include "SkColor.h"
10#include "SkColorFilter.h"
11#include "SkRandom.h"
12#include "SkXfermode.h"
13
14static SkFlattenable* reincarnate_flattenable(SkFlattenable* obj) {
15    SkFlattenable::Factory fact = obj->getFactory();
16    if (NULL == fact) {
17        return NULL;
18    }
19
20    SkFlattenableWriteBuffer wb(1024);
21    obj->flatten(wb);
22
23    size_t size = wb.size();
24    SkAutoSMalloc<1024> storage(size);
25    // make a copy into storage
26    wb.flatten(storage.get());
27
28    SkFlattenableReadBuffer rb(storage.get(), size);
29    return fact(rb);
30}
31
32template <typename T> T* reincarnate(T* obj) {
33    return (T*)reincarnate_flattenable(obj);
34}
35
36///////////////////////////////////////////////////////////////////////////////
37
38#define ILLEGAL_MODE    ((SkXfermode::Mode)-1)
39
40static void test_asColorMode(skiatest::Reporter* reporter) {
41    SkRandom rand;
42
43    for (int mode = 0; mode <= SkXfermode::kLastMode; mode++) {
44        SkColor color = rand.nextU();
45
46        // ensure we always get a filter, by avoiding the possibility of a
47        // special case that would return NULL (if color's alpha is 0 or 0xFF)
48        color = SkColorSetA(color, 0x7F);
49
50        SkColorFilter* cf = SkColorFilter::CreateModeFilter(color,
51                                                        (SkXfermode::Mode)mode);
52
53        // allow for no filter if we're in Dst mode (its a no op)
54        if (SkXfermode::kDst_Mode == mode && NULL == cf) {
55            continue;
56        }
57
58        SkAutoUnref aur(cf);
59        REPORTER_ASSERT(reporter, cf);
60
61        SkColor c = ~color;
62        SkXfermode::Mode m = ILLEGAL_MODE;
63
64        SkColor expectedColor = color;
65        SkXfermode::Mode expectedMode = (SkXfermode::Mode)mode;
66
67//        SkDebugf("--- mc [%d %x] ", mode, color);
68
69        REPORTER_ASSERT(reporter, cf->asColorMode(&c, &m));
70        // handle special-case folding by the factory
71        if (SkXfermode::kClear_Mode == mode) {
72            if (c != expectedColor) {
73                expectedColor = 0;
74            }
75            if (m != expectedMode) {
76                expectedMode = SkXfermode::kSrc_Mode;
77            }
78        }
79
80//        SkDebugf("--- got [%d %x] expected [%d %x]\n", m, c, expectedMode, expectedColor);
81
82        REPORTER_ASSERT(reporter, c == expectedColor);
83        REPORTER_ASSERT(reporter, m == expectedMode);
84
85        {
86            SkColorFilter* cf2 = reincarnate(cf);
87            SkAutoUnref aur2(cf2);
88            REPORTER_ASSERT(reporter, cf2);
89
90            SkColor c2 = ~color;
91            SkXfermode::Mode m2 = ILLEGAL_MODE;
92            REPORTER_ASSERT(reporter, cf2->asColorMode(&c2, &m2));
93            REPORTER_ASSERT(reporter, c2 == expectedColor);
94            REPORTER_ASSERT(reporter, m2 == expectedMode);
95        }
96    }
97}
98
99#include "TestClassDef.h"
100DEFINE_TESTCLASS("ColorFilter", ColorFilterTestClass, test_asColorMode)
101