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 "Test.h"
9#include "TestClassDef.h"
10#include "SkPaint.h"
11#include "SkUtils.h"
12
13// Unicode Variation Selector ranges: inclusive
14#define UVS_MIN0    0x180B
15#define UVS_MAX0    0x180D
16#define UVS_MIN1    0xFE00
17#define UVS_MAX1    0xFE0F
18#define UVS_MIN2    0xE0100
19#define UVS_MAX2    0xE01EF
20
21static bool isUVS(SkUnichar uni) {
22    return (uni >= UVS_MIN0 && uni <= UVS_MAX0) ||
23           (uni >= UVS_MIN1 && uni <= UVS_MAX1) ||
24           (uni >= UVS_MIN2 && uni <= UVS_MAX2);
25}
26
27static void test_uvs(skiatest::Reporter* reporter) {
28    // [min, max], [min, max] ... inclusive
29    static const SkUnichar gRanges[] = {
30        UVS_MIN0, UVS_MAX0, UVS_MIN1, UVS_MAX1, UVS_MIN2, UVS_MAX2
31    };
32
33    for (size_t i = 0; i < SK_ARRAY_COUNT(gRanges); i += 2) {
34        for (SkUnichar uni = gRanges[i] - 8; uni <= gRanges[i+1] + 8; ++uni) {
35            bool uvs0 = isUVS(uni);
36            bool uvs1 = SkUnichar_IsVariationSelector(uni);
37            REPORTER_ASSERT(reporter, uvs0 == uvs1);
38        }
39    }
40}
41
42// Simple test to ensure that when we call textToGlyphs, we get the same
43// result (for the same text) when using UTF8, UTF16, UTF32.
44// TODO: make the text more complex (i.e. incorporate chars>7bits)
45static void test_textencodings(skiatest::Reporter* reporter) {
46    const char text8[] = "ABCDEFGabcdefg0123456789";
47    uint16_t text16[sizeof(text8)];
48    int32_t  text32[sizeof(text8)];
49    size_t len8 = strlen(text8);
50    size_t len16 = len8 * 2;
51    size_t len32 = len8 * 4;
52
53    // expand our 8bit chars to 16 and 32
54    for (size_t i = 0; i < len8; ++i) {
55        text32[i] = text16[i] = text8[i];
56    }
57
58    uint16_t glyphs8[sizeof(text8)];
59    uint16_t glyphs16[sizeof(text8)];
60    uint16_t glyphs32[sizeof(text8)];
61
62    SkPaint paint;
63
64    paint.setTextEncoding(SkPaint::kUTF8_TextEncoding);
65    int count8  = paint.textToGlyphs(text8,  len8,  glyphs8);
66
67    paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
68    int count16 = paint.textToGlyphs(text16, len16, glyphs16);
69
70    paint.setTextEncoding(SkPaint::kUTF32_TextEncoding);
71    int count32 = paint.textToGlyphs(text32, len32, glyphs32);
72
73    REPORTER_ASSERT(reporter, (int)len8 == count8);
74    REPORTER_ASSERT(reporter, (int)len8 == count16);
75    REPORTER_ASSERT(reporter, (int)len8 == count32);
76
77    REPORTER_ASSERT(reporter, !memcmp(glyphs8, glyphs16, count8 * sizeof(uint16_t)));
78    REPORTER_ASSERT(reporter, !memcmp(glyphs8, glyphs32, count8 * sizeof(uint16_t)));
79}
80
81DEF_TEST(Unicode, reporter) {
82    test_uvs(reporter);
83    test_textencodings(reporter);
84}
85