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 "tests/Test.h"
9
10 #ifdef SK_SUPPORT_PDF
11
12 #include "include/core/SkData.h"
13 #include "include/core/SkStream.h"
14 #include "include/private/SkTo.h"
15 #include "src/pdf/SkPDFMakeToUnicodeCmap.h"
16
17 static constexpr SkGlyphID kMaximumGlyphIndex = UINT16_MAX;
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 SkPDFGlyphUse subset(1, kMaximumGlyphIndex);
40
41 glyphToUnicode.push_back(0); // 0
42 glyphToUnicode.push_back(0); // 1
43 glyphToUnicode.push_back(0); // 2
44 glyphsInSubset.push_back(3);
45 glyphToUnicode.push_back(0x20); // 3
46 glyphsInSubset.push_back(4);
47 glyphToUnicode.push_back(0x25); // 4
48 glyphsInSubset.push_back(5);
49 glyphToUnicode.push_back(0x27); // 5
50 glyphsInSubset.push_back(6);
51 glyphToUnicode.push_back(0x28); // 6
52 glyphsInSubset.push_back(7);
53 glyphToUnicode.push_back(0x29); // 7
54 glyphsInSubset.push_back(8);
55 glyphToUnicode.push_back(0x2F); // 8
56 glyphsInSubset.push_back(9);
57 glyphToUnicode.push_back(0x33); // 9
58 glyphToUnicode.push_back(0); // 10
59 glyphsInSubset.push_back(11);
60 glyphToUnicode.push_back(0x35); // 11
61 glyphsInSubset.push_back(12);
62 glyphToUnicode.push_back(0x36); // 12
63 glyphsInSubset.push_back(13);
64 glyphToUnicode.push_back(0x37); // 13
65 for (uint16_t i = 14; i < 0xFE; ++i) {
66 glyphToUnicode.push_back(0); // Zero from index 0x9 to 0xFD
67 }
68 glyphsInSubset.push_back(0xFE);
69 glyphToUnicode.push_back(0x1010);
70 glyphsInSubset.push_back(0xFF);
71 glyphToUnicode.push_back(0x1011);
72 glyphsInSubset.push_back(0x100);
73 glyphToUnicode.push_back(0x1012);
74 glyphsInSubset.push_back(0x101);
75 glyphToUnicode.push_back(0x1013);
76
77 SkGlyphID lastGlyphID = SkToU16(glyphToUnicode.count() - 1);
78
79 SkDynamicMemoryWStream buffer;
80 for (uint16_t v : glyphsInSubset) {
81 subset.set(v);
82 }
83 SkPDFAppendCmapSections(&glyphToUnicode[0], &subset, &buffer, true, 0,
84 std::min<SkGlyphID>(0xFFFF, lastGlyphID));
85
86 char expectedResult[] =
87 "4 beginbfchar\n\
88 <0003> <0020>\n\
89 <0004> <0025>\n\
90 <0008> <002F>\n\
91 <0009> <0033>\n\
92 endbfchar\n\
93 4 beginbfrange\n\
94 <0005> <0007> <0027>\n\
95 <000B> <000D> <0035>\n\
96 <00FE> <00FF> <1010>\n\
97 <0100> <0101> <1012>\n\
98 endbfrange\n";
99
100 REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResult,
101 buffer.bytesWritten()));
102
103 // Remove characters and ranges.
104 buffer.reset();
105
106 SkPDFAppendCmapSections(&glyphToUnicode[0], &subset, &buffer, true, 8,
107 std::min<SkGlyphID>(0x00FF, lastGlyphID));
108
109 char expectedResultChop1[] =
110 "2 beginbfchar\n\
111 <0008> <002F>\n\
112 <0009> <0033>\n\
113 endbfchar\n\
114 2 beginbfrange\n\
115 <000B> <000D> <0035>\n\
116 <00FE> <00FF> <1010>\n\
117 endbfrange\n";
118
119 REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResultChop1,
120 buffer.bytesWritten()));
121
122 // Remove characters from range to downdrade it to one char.
123 buffer.reset();
124
125 SkPDFAppendCmapSections(&glyphToUnicode[0], &subset, &buffer, true, 0x00D,
126 std::min<SkGlyphID>(0x00FE, lastGlyphID));
127
128 char expectedResultChop2[] =
129 "2 beginbfchar\n\
130 <000D> <0037>\n\
131 <00FE> <1010>\n\
132 endbfchar\n";
133
134 REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResultChop2,
135 buffer.bytesWritten()));
136
137 buffer.reset();
138
139 SkPDFAppendCmapSections(&glyphToUnicode[0], nullptr, &buffer, false, 0xFC,
140 std::min<SkGlyphID>(0x110, lastGlyphID));
141
142 char expectedResultSingleBytes[] =
143 "2 beginbfchar\n\
144 <01> <0000>\n\
145 <02> <0000>\n\
146 endbfchar\n\
147 1 beginbfrange\n\
148 <03> <06> <1010>\n\
149 endbfrange\n";
150
151 REPORTER_ASSERT(reporter, stream_equals(buffer, 0,
152 expectedResultSingleBytes,
153 buffer.bytesWritten()));
154
155 glyphToUnicode.reset();
156 glyphsInSubset.reset();
157 SkPDFGlyphUse subset2(1, kMaximumGlyphIndex);
158
159 // Test mapping:
160 // I n s t a l
161 // Glyph id 2c 51 56 57 44 4f
162 // Unicode 49 6e 73 74 61 6c
163 for (SkUnichar i = 0; i < 100; ++i) {
164 glyphToUnicode.push_back(i + 29);
165 }
166 lastGlyphID = SkToU16(glyphToUnicode.count() - 1);
167
168 glyphsInSubset.push_back(0x2C);
169 glyphsInSubset.push_back(0x44);
170 glyphsInSubset.push_back(0x4F);
171 glyphsInSubset.push_back(0x51);
172 glyphsInSubset.push_back(0x56);
173 glyphsInSubset.push_back(0x57);
174
175 SkDynamicMemoryWStream buffer2;
176 for (uint16_t v : glyphsInSubset) {
177 subset2.set(v);
178 }
179 SkPDFAppendCmapSections(&glyphToUnicode[0], &subset2, &buffer2, true, 0,
180 std::min<SkGlyphID>(0xFFFF, lastGlyphID));
181
182 char expectedResult2[] =
183 "4 beginbfchar\n\
184 <002C> <0049>\n\
185 <0044> <0061>\n\
186 <004F> <006C>\n\
187 <0051> <006E>\n\
188 endbfchar\n\
189 1 beginbfrange\n\
190 <0056> <0057> <0073>\n\
191 endbfrange\n";
192
193 REPORTER_ASSERT(reporter, stream_equals(buffer2, 0, expectedResult2,
194 buffer2.bytesWritten()));
195 }
196
197 #endif
198