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 #include "SkTo.h"
17
18 static constexpr SkGlyphID kMaximumGlyphIndex = UINT16_MAX;
19
stream_equals(const SkDynamicMemoryWStream & stream,size_t offset,const char * buffer,size_t len)20 static bool stream_equals(const SkDynamicMemoryWStream& stream, size_t offset,
21 const char* buffer, size_t len) {
22 if (len != strlen(buffer)) {
23 return false;
24 }
25
26 const size_t streamSize = stream.bytesWritten();
27
28 if (offset + len > streamSize) {
29 return false;
30 }
31
32 SkAutoTMalloc<char> data(streamSize);
33 stream.copyTo(data.get());
34 return memcmp(data.get() + offset, buffer, len) == 0;
35 }
36
DEF_TEST(SkPDF_ToUnicode,reporter)37 DEF_TEST(SkPDF_ToUnicode, reporter) {
38 SkTDArray<SkUnichar> glyphToUnicode;
39 SkTDArray<uint16_t> glyphsInSubset;
40 SkPDFGlyphUse subset(1, kMaximumGlyphIndex);
41
42 glyphToUnicode.push_back(0); // 0
43 glyphToUnicode.push_back(0); // 1
44 glyphToUnicode.push_back(0); // 2
45 glyphsInSubset.push_back(3);
46 glyphToUnicode.push_back(0x20); // 3
47 glyphsInSubset.push_back(4);
48 glyphToUnicode.push_back(0x25); // 4
49 glyphsInSubset.push_back(5);
50 glyphToUnicode.push_back(0x27); // 5
51 glyphsInSubset.push_back(6);
52 glyphToUnicode.push_back(0x28); // 6
53 glyphsInSubset.push_back(7);
54 glyphToUnicode.push_back(0x29); // 7
55 glyphsInSubset.push_back(8);
56 glyphToUnicode.push_back(0x2F); // 8
57 glyphsInSubset.push_back(9);
58 glyphToUnicode.push_back(0x33); // 9
59 glyphToUnicode.push_back(0); // 10
60 glyphsInSubset.push_back(11);
61 glyphToUnicode.push_back(0x35); // 11
62 glyphsInSubset.push_back(12);
63 glyphToUnicode.push_back(0x36); // 12
64 glyphsInSubset.push_back(13);
65 glyphToUnicode.push_back(0x37); // 13
66 for (uint16_t i = 14; i < 0xFE; ++i) {
67 glyphToUnicode.push_back(0); // Zero from index 0x9 to 0xFD
68 }
69 glyphsInSubset.push_back(0xFE);
70 glyphToUnicode.push_back(0x1010);
71 glyphsInSubset.push_back(0xFF);
72 glyphToUnicode.push_back(0x1011);
73 glyphsInSubset.push_back(0x100);
74 glyphToUnicode.push_back(0x1012);
75 glyphsInSubset.push_back(0x101);
76 glyphToUnicode.push_back(0x1013);
77
78 SkGlyphID lastGlyphID = SkToU16(glyphToUnicode.count() - 1);
79
80 SkDynamicMemoryWStream buffer;
81 for (uint16_t v : glyphsInSubset) {
82 subset.set(v);
83 }
84 SkPDFAppendCmapSections(&glyphToUnicode[0], &subset, &buffer, true, 0,
85 SkTMin<SkGlyphID>(0xFFFF, lastGlyphID));
86
87 char expectedResult[] =
88 "4 beginbfchar\n\
89 <0003> <0020>\n\
90 <0004> <0025>\n\
91 <0008> <002F>\n\
92 <0009> <0033>\n\
93 endbfchar\n\
94 4 beginbfrange\n\
95 <0005> <0007> <0027>\n\
96 <000B> <000D> <0035>\n\
97 <00FE> <00FF> <1010>\n\
98 <0100> <0101> <1012>\n\
99 endbfrange\n";
100
101 REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResult,
102 buffer.bytesWritten()));
103
104 // Remove characters and ranges.
105 buffer.reset();
106
107 SkPDFAppendCmapSections(&glyphToUnicode[0], &subset, &buffer, true, 8,
108 SkTMin<SkGlyphID>(0x00FF, lastGlyphID));
109
110 char expectedResultChop1[] =
111 "2 beginbfchar\n\
112 <0008> <002F>\n\
113 <0009> <0033>\n\
114 endbfchar\n\
115 2 beginbfrange\n\
116 <000B> <000D> <0035>\n\
117 <00FE> <00FF> <1010>\n\
118 endbfrange\n";
119
120 REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResultChop1,
121 buffer.bytesWritten()));
122
123 // Remove characters from range to downdrade it to one char.
124 buffer.reset();
125
126 SkPDFAppendCmapSections(&glyphToUnicode[0], &subset, &buffer, true, 0x00D,
127 SkTMin<SkGlyphID>(0x00FE, lastGlyphID));
128
129 char expectedResultChop2[] =
130 "2 beginbfchar\n\
131 <000D> <0037>\n\
132 <00FE> <1010>\n\
133 endbfchar\n";
134
135 REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResultChop2,
136 buffer.bytesWritten()));
137
138 buffer.reset();
139
140 SkPDFAppendCmapSections(&glyphToUnicode[0], nullptr, &buffer, false, 0xFC,
141 SkTMin<SkGlyphID>(0x110, lastGlyphID));
142
143 char expectedResultSingleBytes[] =
144 "2 beginbfchar\n\
145 <01> <0000>\n\
146 <02> <0000>\n\
147 endbfchar\n\
148 1 beginbfrange\n\
149 <03> <06> <1010>\n\
150 endbfrange\n";
151
152 REPORTER_ASSERT(reporter, stream_equals(buffer, 0,
153 expectedResultSingleBytes,
154 buffer.bytesWritten()));
155
156 glyphToUnicode.reset();
157 glyphsInSubset.reset();
158 SkPDFGlyphUse subset2(1, kMaximumGlyphIndex);
159
160 // Test mapping:
161 // I n s t a l
162 // Glyph id 2c 51 56 57 44 4f
163 // Unicode 49 6e 73 74 61 6c
164 for (SkUnichar i = 0; i < 100; ++i) {
165 glyphToUnicode.push_back(i + 29);
166 }
167 lastGlyphID = SkToU16(glyphToUnicode.count() - 1);
168
169 glyphsInSubset.push_back(0x2C);
170 glyphsInSubset.push_back(0x44);
171 glyphsInSubset.push_back(0x4F);
172 glyphsInSubset.push_back(0x51);
173 glyphsInSubset.push_back(0x56);
174 glyphsInSubset.push_back(0x57);
175
176 SkDynamicMemoryWStream buffer2;
177 for (uint16_t v : glyphsInSubset) {
178 subset2.set(v);
179 }
180 SkPDFAppendCmapSections(&glyphToUnicode[0], &subset2, &buffer2, true, 0,
181 SkTMin<SkGlyphID>(0xFFFF, lastGlyphID));
182
183 char expectedResult2[] =
184 "4 beginbfchar\n\
185 <002C> <0049>\n\
186 <0044> <0061>\n\
187 <004F> <006C>\n\
188 <0051> <006E>\n\
189 endbfchar\n\
190 1 beginbfrange\n\
191 <0056> <0057> <0073>\n\
192 endbfrange\n";
193
194 REPORTER_ASSERT(reporter, stream_equals(buffer2, 0, expectedResult2,
195 buffer2.bytesWritten()));
196 }
197
198 #endif
199