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
14static 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
26void 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
33DEF_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\
84endbfchar\n\
854 beginbfrange\n\
86<0005> <0007> <0027>\n\
87<000B> <000D> <0035>\n\
88<00FE> <00FF> <1010>\n\
89<0100> <0101> <1012>\n\
90endbfrange\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\
104endbfchar\n\
1052 beginbfrange\n\
106<000B> <000D> <0035>\n\
107<00FE> <00FF> <1010>\n\
108endbfrange\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\
122endbfchar\n";
123
124    REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResultChop2,
125                                            buffer.getOffset()));
126
127    buffer.reset();
128
129    append_cmap_sections(glyphToUnicode, NULL, &buffer, false, 0xFC, 0x110);
130
131    char expectedResultSingleBytes[] =
132"2 beginbfchar\n\
133<0001> <0000>\n\
134<0002> <0000>\n\
135endbfchar\n\
1361 beginbfrange\n\
137<0003> <0006> <1010>\n\
138endbfrange\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 (size_t 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\
173endbfchar\n\
1741 beginbfrange\n\
175<0056> <0057> <0073>\n\
176endbfrange\n";
177
178    REPORTER_ASSERT(reporter, stream_equals(buffer2, 0, expectedResult2,
179                                            buffer2.getOffset()));
180}
181