1 /*
2 * Copyright 2010 The Android Open Source Project
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
10 #ifdef SK_SUPPORT_PDF
11
12 #include "SkBitSet.h"
13 #include "SkData.h"
14 #include "SkPDFMakeToUnicodeCmap.h"
15 #include "SkStream.h"
16
17 static const int kMaximumGlyphCount = SK_MaxU16 + 1;
18
stream_equals(const SkDynamicMemoryWStream & stream,size_t offset,const char * buffer,size_t len)19 static bool stream_equals(const SkDynamicMemoryWStream& stream, size_t offset,
20 const char* buffer, size_t len) {
21 if (len != strlen(buffer)) {
22 return false;
23 }
24
25 const size_t streamSize = stream.bytesWritten();
26
27 if (offset + len > streamSize) {
28 return false;
29 }
30
31 SkAutoTMalloc<char> data(streamSize);
32 stream.copyTo(data.get());
33 return memcmp(data.get() + offset, buffer, len) == 0;
34 }
35
DEF_TEST(SkPDF_ToUnicode,reporter)36 DEF_TEST(SkPDF_ToUnicode, reporter) {
37 SkTDArray<SkUnichar> glyphToUnicode;
38 SkTDArray<uint16_t> glyphsInSubset;
39 SkBitSet subset(kMaximumGlyphCount);
40
41 glyphToUnicode.push(0); // 0
42 glyphToUnicode.push(0); // 1
43 glyphToUnicode.push(0); // 2
44 glyphsInSubset.push(3);
45 glyphToUnicode.push(0x20); // 3
46 glyphsInSubset.push(4);
47 glyphToUnicode.push(0x25); // 4
48 glyphsInSubset.push(5);
49 glyphToUnicode.push(0x27); // 5
50 glyphsInSubset.push(6);
51 glyphToUnicode.push(0x28); // 6
52 glyphsInSubset.push(7);
53 glyphToUnicode.push(0x29); // 7
54 glyphsInSubset.push(8);
55 glyphToUnicode.push(0x2F); // 8
56 glyphsInSubset.push(9);
57 glyphToUnicode.push(0x33); // 9
58 glyphToUnicode.push(0); // 10
59 glyphsInSubset.push(11);
60 glyphToUnicode.push(0x35); // 11
61 glyphsInSubset.push(12);
62 glyphToUnicode.push(0x36); // 12
63 glyphsInSubset.push(13);
64 glyphToUnicode.push(0x37); // 13
65 for (uint16_t i = 14; i < 0xFE; ++i) {
66 glyphToUnicode.push(0); // Zero from index 0x9 to 0xFD
67 }
68 glyphsInSubset.push(0xFE);
69 glyphToUnicode.push(0x1010);
70 glyphsInSubset.push(0xFF);
71 glyphToUnicode.push(0x1011);
72 glyphsInSubset.push(0x100);
73 glyphToUnicode.push(0x1012);
74 glyphsInSubset.push(0x101);
75 glyphToUnicode.push(0x1013);
76
77 SkDynamicMemoryWStream buffer;
78 subset.setAll(glyphsInSubset.begin(), glyphsInSubset.count());
79 SkPDFAppendCmapSections(glyphToUnicode, &subset, &buffer, true, 0, 0xFFFF);
80
81 char expectedResult[] =
82 "4 beginbfchar\n\
83 <0003> <0020>\n\
84 <0004> <0025>\n\
85 <0008> <002F>\n\
86 <0009> <0033>\n\
87 endbfchar\n\
88 4 beginbfrange\n\
89 <0005> <0007> <0027>\n\
90 <000B> <000D> <0035>\n\
91 <00FE> <00FF> <1010>\n\
92 <0100> <0101> <1012>\n\
93 endbfrange\n";
94
95 REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResult,
96 buffer.bytesWritten()));
97
98 // Remove characters and ranges.
99 buffer.reset();
100
101 SkPDFAppendCmapSections(glyphToUnicode, &subset, &buffer, true, 8, 0x00FF);
102
103 char expectedResultChop1[] =
104 "2 beginbfchar\n\
105 <0008> <002F>\n\
106 <0009> <0033>\n\
107 endbfchar\n\
108 2 beginbfrange\n\
109 <000B> <000D> <0035>\n\
110 <00FE> <00FF> <1010>\n\
111 endbfrange\n";
112
113 REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResultChop1,
114 buffer.bytesWritten()));
115
116 // Remove characters from range to downdrade it to one char.
117 buffer.reset();
118
119 SkPDFAppendCmapSections(glyphToUnicode, &subset, &buffer, true, 0x00D, 0x00FE);
120
121 char expectedResultChop2[] =
122 "2 beginbfchar\n\
123 <000D> <0037>\n\
124 <00FE> <1010>\n\
125 endbfchar\n";
126
127 REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResultChop2,
128 buffer.bytesWritten()));
129
130 buffer.reset();
131
132 SkPDFAppendCmapSections(glyphToUnicode, nullptr, &buffer, false, 0xFC, 0x110);
133
134 char expectedResultSingleBytes[] =
135 "2 beginbfchar\n\
136 <01> <0000>\n\
137 <02> <0000>\n\
138 endbfchar\n\
139 1 beginbfrange\n\
140 <03> <06> <1010>\n\
141 endbfrange\n";
142
143 REPORTER_ASSERT(reporter, stream_equals(buffer, 0,
144 expectedResultSingleBytes,
145 buffer.bytesWritten()));
146
147 glyphToUnicode.reset();
148 glyphsInSubset.reset();
149 SkBitSet subset2(kMaximumGlyphCount);
150
151 // Test mapping:
152 // I n s t a l
153 // Glyph id 2c 51 56 57 44 4f
154 // Unicode 49 6e 73 74 61 6c
155 for (SkUnichar i = 0; i < 100; ++i) {
156 glyphToUnicode.push(i + 29);
157 }
158
159 glyphsInSubset.push(0x2C);
160 glyphsInSubset.push(0x44);
161 glyphsInSubset.push(0x4F);
162 glyphsInSubset.push(0x51);
163 glyphsInSubset.push(0x56);
164 glyphsInSubset.push(0x57);
165
166 SkDynamicMemoryWStream buffer2;
167 subset2.setAll(glyphsInSubset.begin(), glyphsInSubset.count());
168 SkPDFAppendCmapSections(glyphToUnicode, &subset2, &buffer2, true, 0, 0xffff);
169
170 char expectedResult2[] =
171 "4 beginbfchar\n\
172 <002C> <0049>\n\
173 <0044> <0061>\n\
174 <004F> <006C>\n\
175 <0051> <006E>\n\
176 endbfchar\n\
177 1 beginbfrange\n\
178 <0056> <0057> <0073>\n\
179 endbfrange\n";
180
181 REPORTER_ASSERT(reporter, stream_equals(buffer2, 0, expectedResult2,
182 buffer2.bytesWritten()));
183 }
184
185 #endif
186