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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 
isUVS(SkUnichar uni)20 static 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 
test_uvs(skiatest::Reporter * reporter)26 static 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)
test_textencodings(skiatest::Reporter * reporter)44 static 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 
DEF_TEST(Unicode,reporter)80 DEF_TEST(Unicode, reporter) {
81     test_uvs(reporter);
82     test_textencodings(reporter);
83 }
84