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 "SkData.h"
9 #include "SkPDFFont.h"
10 #include "SkPDFTypes.h"
11 #include "SkStream.h"
12 #include "Test.h"
13 
stream_equals(const SkDynamicMemoryWStream & stream,size_t offset,const char * buffer,size_t len)14 static bool stream_equals(const SkDynamicMemoryWStream& stream, size_t offset,
15                           const char* buffer, size_t len) {
16     SkAutoDataUnref data(stream.copyToData());
17     if (offset + len > data->size()) {
18         return false;
19     }
20     if (len != strlen(buffer)) {
21         return false;
22     }
23     return memcmp(data->bytes() + offset, buffer, len) == 0;
24 }
25 
26 void append_cmap_sections(const SkTDArray<SkUnichar>& glyphToUnicode,
27                           const SkPDFGlyphSet* subset,
28                           SkDynamicMemoryWStream* cmap,
29                           bool multiByteGlyphs,
30                           uint16_t firstGlypthID,
31                           uint16_t lastGlypthID);
32 
DEF_TEST(ToUnicode,reporter)33 DEF_TEST(ToUnicode, reporter) {
34     SkTDArray<SkUnichar> glyphToUnicode;
35     SkTDArray<uint16_t> glyphsInSubset;
36     SkPDFGlyphSet subset;
37 
38     glyphToUnicode.push(0);  // 0
39     glyphToUnicode.push(0);  // 1
40     glyphToUnicode.push(0);  // 2
41     glyphsInSubset.push(3);
42     glyphToUnicode.push(0x20);  // 3
43     glyphsInSubset.push(4);
44     glyphToUnicode.push(0x25);  // 4
45     glyphsInSubset.push(5);
46     glyphToUnicode.push(0x27);  // 5
47     glyphsInSubset.push(6);
48     glyphToUnicode.push(0x28);  // 6
49     glyphsInSubset.push(7);
50     glyphToUnicode.push(0x29);  // 7
51     glyphsInSubset.push(8);
52     glyphToUnicode.push(0x2F);  // 8
53     glyphsInSubset.push(9);
54     glyphToUnicode.push(0x33);  // 9
55     glyphToUnicode.push(0);  // 10
56     glyphsInSubset.push(11);
57     glyphToUnicode.push(0x35);  // 11
58     glyphsInSubset.push(12);
59     glyphToUnicode.push(0x36);  // 12
60     glyphsInSubset.push(13);
61     glyphToUnicode.push(0x37);  // 13
62     for (uint16_t i = 14; i < 0xFE; ++i) {
63         glyphToUnicode.push(0);  // Zero from index 0x9 to 0xFD
64     }
65     glyphsInSubset.push(0xFE);
66     glyphToUnicode.push(0x1010);
67     glyphsInSubset.push(0xFF);
68     glyphToUnicode.push(0x1011);
69     glyphsInSubset.push(0x100);
70     glyphToUnicode.push(0x1012);
71     glyphsInSubset.push(0x101);
72     glyphToUnicode.push(0x1013);
73 
74     SkDynamicMemoryWStream buffer;
75     subset.set(glyphsInSubset.begin(), glyphsInSubset.count());
76     append_cmap_sections(glyphToUnicode, &subset, &buffer, true, 0, 0xFFFF);
77 
78     char expectedResult[] =
79 "4 beginbfchar\n\
80 <0003> <0020>\n\
81 <0004> <0025>\n\
82 <0008> <002F>\n\
83 <0009> <0033>\n\
84 endbfchar\n\
85 4 beginbfrange\n\
86 <0005> <0007> <0027>\n\
87 <000B> <000D> <0035>\n\
88 <00FE> <00FF> <1010>\n\
89 <0100> <0101> <1012>\n\
90 endbfrange\n";
91 
92     REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResult,
93                                             buffer.getOffset()));
94 
95     // Remove characters and ranges.
96     buffer.reset();
97 
98     append_cmap_sections(glyphToUnicode, &subset, &buffer, true, 8, 0x00FF);
99 
100     char expectedResultChop1[] =
101 "2 beginbfchar\n\
102 <0008> <002F>\n\
103 <0009> <0033>\n\
104 endbfchar\n\
105 2 beginbfrange\n\
106 <000B> <000D> <0035>\n\
107 <00FE> <00FF> <1010>\n\
108 endbfrange\n";
109 
110     REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResultChop1,
111                                             buffer.getOffset()));
112 
113     // Remove characters from range to downdrade it to one char.
114     buffer.reset();
115 
116     append_cmap_sections(glyphToUnicode, &subset, &buffer, true, 0x00D, 0x00FE);
117 
118     char expectedResultChop2[] =
119 "2 beginbfchar\n\
120 <000D> <0037>\n\
121 <00FE> <1010>\n\
122 endbfchar\n";
123 
124     REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResultChop2,
125                                             buffer.getOffset()));
126 
127     buffer.reset();
128 
129     append_cmap_sections(glyphToUnicode, nullptr, &buffer, false, 0xFC, 0x110);
130 
131     char expectedResultSingleBytes[] =
132 "2 beginbfchar\n\
133 <0001> <0000>\n\
134 <0002> <0000>\n\
135 endbfchar\n\
136 1 beginbfrange\n\
137 <0003> <0006> <1010>\n\
138 endbfrange\n";
139 
140     REPORTER_ASSERT(reporter, stream_equals(buffer, 0,
141                                             expectedResultSingleBytes,
142                                             buffer.getOffset()));
143 
144     glyphToUnicode.reset();
145     glyphsInSubset.reset();
146     SkPDFGlyphSet subset2;
147 
148     // Test mapping:
149     //           I  n  s  t  a  l
150     // Glyph id 2c 51 56 57 44 4f
151     // Unicode  49 6e 73 74 61 6c
152     for (SkUnichar i = 0; i < 100; ++i) {
153       glyphToUnicode.push(i + 29);
154     }
155 
156     glyphsInSubset.push(0x2C);
157     glyphsInSubset.push(0x44);
158     glyphsInSubset.push(0x4F);
159     glyphsInSubset.push(0x51);
160     glyphsInSubset.push(0x56);
161     glyphsInSubset.push(0x57);
162 
163     SkDynamicMemoryWStream buffer2;
164     subset2.set(glyphsInSubset.begin(), glyphsInSubset.count());
165     append_cmap_sections(glyphToUnicode, &subset2, &buffer2, true, 0, 0xffff);
166 
167     char expectedResult2[] =
168 "4 beginbfchar\n\
169 <002C> <0049>\n\
170 <0044> <0061>\n\
171 <004F> <006C>\n\
172 <0051> <006E>\n\
173 endbfchar\n\
174 1 beginbfrange\n\
175 <0056> <0057> <0073>\n\
176 endbfrange\n";
177 
178     REPORTER_ASSERT(reporter, stream_equals(buffer2, 0, expectedResult2,
179                                             buffer2.getOffset()));
180 }
181