ColorFilterTest.cpp revision 2b2ede3e713065e1bac461787b0aafb03eaf871f 
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#include "SkOrderedReadBuffer.h"
14#include "SkOrderedWriteBuffer.h"
15
16static SkFlattenable* reincarnate_flattenable(SkFlattenable* obj) {
17    SkOrderedWriteBuffer wb(1024);
18    wb.writeFlattenable(obj);
19
20    size_t size = wb.size();
21    SkAutoSMalloc<1024> storage(size);
22    // make a copy into storage
23    wb.flatten(storage.get());
24
25    SkOrderedReadBuffer rb(storage.get(), size);
26    return rb.readFlattenable();
27}
28
29template <typename T> T* reincarnate(T* obj) {
30    return (T*)reincarnate_flattenable(obj);
31}
32
33///////////////////////////////////////////////////////////////////////////////
34
35#define ILLEGAL_MODE    ((SkXfermode::Mode)-1)
36
37static void test_asColorMode(skiatest::Reporter* reporter) {
38    SkRandom rand;
39
40    for (int mode = 0; mode <= SkXfermode::kLastMode; mode++) {
41        SkColor color = rand.nextU();
42
43        // ensure we always get a filter, by avoiding the possibility of a
44        // special case that would return NULL (if color's alpha is 0 or 0xFF)
45        color = SkColorSetA(color, 0x7F);
46
47        SkColorFilter* cf = SkColorFilter::CreateModeFilter(color,
48                                                        (SkXfermode::Mode)mode);
49
50        // allow for no filter if we're in Dst mode (its a no op)
51        if (SkXfermode::kDst_Mode == mode && NULL == cf) {
52            continue;
53        }
54
55        SkAutoUnref aur(cf);
56        REPORTER_ASSERT(reporter, cf);
57
58        SkColor c = ~color;
59        SkXfermode::Mode m = ILLEGAL_MODE;
60
61        SkColor expectedColor = color;
62        SkXfermode::Mode expectedMode = (SkXfermode::Mode)mode;
63
64//        SkDebugf("--- mc [%d %x] ", mode, color);
65
66        REPORTER_ASSERT(reporter, cf->asColorMode(&c, &m));
67        // handle special-case folding by the factory
68        if (SkXfermode::kClear_Mode == mode) {
69            if (c != expectedColor) {
70                expectedColor = 0;
71            }
72            if (m != expectedMode) {
73                expectedMode = SkXfermode::kSrc_Mode;
74            }
75        }
76
77//        SkDebugf("--- got [%d %x] expected [%d %x]\n", m, c, expectedMode, expectedColor);
78
79        REPORTER_ASSERT(reporter, c == expectedColor);
80        REPORTER_ASSERT(reporter, m == expectedMode);
81
82        {
83            SkColorFilter* cf2 = reincarnate(cf);
84            SkAutoUnref aur2(cf2);
85            REPORTER_ASSERT(reporter, cf2);
86
87            SkColor c2 = ~color;
88            SkXfermode::Mode m2 = ILLEGAL_MODE;
89            REPORTER_ASSERT(reporter, cf2->asColorMode(&c2, &m2));
90            REPORTER_ASSERT(reporter, c2 == expectedColor);
91            REPORTER_ASSERT(reporter, m2 == expectedMode);
92        }
93    }
94}
95
96#include "TestClassDef.h"
97DEFINE_TESTCLASS("ColorFilter", ColorFilterTestClass, test_asColorMode)
98