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 
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 
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