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#include "SkPaint.h"
9#include "SkUtils.h"
10#include "Test.h"
11
12// Unicode Variation Selector ranges: inclusive
13#define UVS_MIN0    0x180B
14#define UVS_MAX0    0x180D
15#define UVS_MIN1    0xFE00
16#define UVS_MAX1    0xFE0F
17#define UVS_MIN2    0xE0100
18#define UVS_MAX2    0xE01EF
19
20static bool isUVS(SkUnichar uni) {
21    return (uni >= UVS_MIN0 && uni <= UVS_MAX0) ||
22           (uni >= UVS_MIN1 && uni <= UVS_MAX1) ||
23           (uni >= UVS_MIN2 && uni <= UVS_MAX2);
24}
25
26static void test_uvs(skiatest::Reporter* reporter) {
27    // [min, max], [min, max] ... inclusive
28    static const SkUnichar gRanges[] = {
29        UVS_MIN0, UVS_MAX0, UVS_MIN1, UVS_MAX1, UVS_MIN2, UVS_MAX2
30    };
31
32    for (size_t i = 0; i < SK_ARRAY_COUNT(gRanges); i += 2) {
33        for (SkUnichar uni = gRanges[i] - 8; uni <= gRanges[i+1] + 8; ++uni) {
34            bool uvs0 = isUVS(uni);
35            bool uvs1 = SkUnichar_IsVariationSelector(uni);
36            REPORTER_ASSERT(reporter, uvs0 == uvs1);
37        }
38    }
39}
40
41// Simple test to ensure that when we call textToGlyphs, we get the same
42// result (for the same text) when using UTF8, UTF16, UTF32.
43// TODO: make the text more complex (i.e. incorporate chars>7bits)
44static void test_textencodings(skiatest::Reporter* reporter) {
45    const char text8[] = "ABCDEFGabcdefg0123456789";
46    uint16_t text16[sizeof(text8)];
47    int32_t  text32[sizeof(text8)];
48    size_t len8 = strlen(text8);
49    size_t len16 = len8 * 2;
50    size_t len32 = len8 * 4;
51
52    // expand our 8bit chars to 16 and 32
53    for (size_t i = 0; i < len8; ++i) {
54        text32[i] = text16[i] = text8[i];
55    }
56
57    uint16_t glyphs8[sizeof(text8)];
58    uint16_t glyphs16[sizeof(text8)];
59    uint16_t glyphs32[sizeof(text8)];
60
61    SkPaint paint;
62
63    paint.setTextEncoding(SkPaint::kUTF8_TextEncoding);
64    int count8  = paint.textToGlyphs(text8,  len8,  glyphs8);
65
66    paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
67    int count16 = paint.textToGlyphs(text16, len16, glyphs16);
68
69    paint.setTextEncoding(SkPaint::kUTF32_TextEncoding);
70    int count32 = paint.textToGlyphs(text32, len32, glyphs32);
71
72    REPORTER_ASSERT(reporter, (int)len8 == count8);
73    REPORTER_ASSERT(reporter, (int)len8 == count16);
74    REPORTER_ASSERT(reporter, (int)len8 == count32);
75
76    REPORTER_ASSERT(reporter, !memcmp(glyphs8, glyphs16, count8 * sizeof(uint16_t)));
77    REPORTER_ASSERT(reporter, !memcmp(glyphs8, glyphs32, count8 * sizeof(uint16_t)));
78}
79
80DEF_TEST(Unicode, reporter) {
81    test_uvs(reporter);
82    test_textencodings(reporter);
83}
84