1 /*
2 * Copyright (C) 2021 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "minikin/FontFileParser.h"
18
19 #include <gtest/gtest.h>
20
21 #include "FontTestUtils.h"
22 #include "FreeTypeMinikinFontForTest.h"
23 #include "PathUtils.h"
24
25 namespace minikin {
26 namespace {
27
writeU16(uint16_t x,uint8_t * out,size_t offset)28 static size_t writeU16(uint16_t x, uint8_t* out, size_t offset) {
29 out[offset] = x >> 8;
30 out[offset + 1] = x;
31 return offset + 2;
32 }
33
writeU32(uint32_t x,uint8_t * out,size_t offset)34 static size_t writeU32(uint32_t x, uint8_t* out, size_t offset) {
35 out[offset] = x >> 24;
36 out[offset + 1] = x >> 16;
37 out[offset + 2] = x >> 8;
38 out[offset + 3] = x;
39 return offset + 4;
40 }
41
42 class TestableFontFileParser : public FontFileParser {
43 public:
44 using FontFileParser::analyzeFontRevision;
45 using FontFileParser::checkPSName;
46 };
47
48 // Returns valid head table contents.
buildHeadTable(uint32_t fontRevision)49 static std::vector<uint8_t> buildHeadTable(uint32_t fontRevision) {
50 std::vector<uint8_t> out(46);
51 size_t head = writeU16(1, out.data(), 0); // major version
52 head = writeU16(0, out.data(), head); // minor version
53 head = writeU32(fontRevision, out.data(), head); // fontRevision
54 head = writeU32(0xB1B0AFBA, out.data(), head); // checksum. (random value)
55 head = writeU32(0x5F0F3CF5, out.data(), head); // magicNumber
56 head = writeU16(0, out.data(), head); // flasgs
57 head = writeU16(1024, out.data(), head); // unitsPerEm
58 head = writeU32(123457890, out.data(), head); // created (random value)
59 head = writeU32(123457890, out.data(), head); // modified (random value)
60 head = writeU16(0, out.data(), head); // xMin
61 head = writeU16(100, out.data(), head); // yMin
62 head = writeU16(1024, out.data(), head); // xMax
63 head = writeU16(2048, out.data(), head); // yMax
64 head = writeU16(0, out.data(), head); // macStyle
65 head = writeU16(10, out.data(), head); // lowestRecPPEM
66 head = writeU16(1, out.data(), head); // fontDirectionHint
67 head = writeU16(1, out.data(), head); // indexToLocFormat
68 head = writeU16(0, out.data(), head); // glyphDataFormat;
69
70 return out;
71 }
72
TEST(FontFileParserTest,analyzeFontRevision)73 TEST(FontFileParserTest, analyzeFontRevision) {
74 uint32_t rev = 0x12345678;
75 std::vector<uint8_t> head = buildHeadTable(rev);
76
77 uint32_t out = 0;
78 EXPECT_TRUE(TestableFontFileParser::analyzeFontRevision(head.data(), head.size(), &out));
79 EXPECT_EQ(rev, out);
80 }
81
TEST(FontFileParserTest,headInvalidLength)82 TEST(FontFileParserTest, headInvalidLength) {
83 uint32_t rev = 0x12345678;
84 std::vector<uint8_t> head = buildHeadTable(rev);
85
86 uint32_t out = 0;
87 EXPECT_FALSE(TestableFontFileParser::analyzeFontRevision(head.data(), 6, &out));
88 }
89
TEST(FontFileParserTest,parseFontForRev)90 TEST(FontFileParserTest, parseFontForRev) {
91 auto minikinFont = std::make_shared<FreeTypeMinikinFontForTest>(getTestFontPath("Ascii.ttf"));
92 auto parser = FontFileParser(minikinFont->GetFontData(), minikinFont->GetFontSize(), 0);
93
94 auto revision = parser.getFontRevision();
95 EXPECT_TRUE(revision.has_value());
96 EXPECT_EQ(0x00010000u, revision.value());
97 }
98
TEST(FontFileParser,checkPSName)99 TEST(FontFileParser, checkPSName) {
100 EXPECT_TRUE(TestableFontFileParser::checkPSName("Roboto-Regular"));
101 EXPECT_TRUE(TestableFontFileParser::checkPSName("NotoColorEmoji"));
102
103 // Space character is not allowed.
104 EXPECT_FALSE(TestableFontFileParser::checkPSName("Roboto Regular"));
105 EXPECT_FALSE(TestableFontFileParser::checkPSName("Noto Color Emoji"));
106
107 // parens are not not allowed.
108 EXPECT_FALSE(TestableFontFileParser::checkPSName("Roboto (Regular)"));
109 EXPECT_FALSE(TestableFontFileParser::checkPSName("Noto <Color> {Emoji}"));
110
111 // control characters are not allowed
112 EXPECT_FALSE(TestableFontFileParser::checkPSName("Roboto-Regular\b"));
113 EXPECT_FALSE(TestableFontFileParser::checkPSName("NotoColorEmoji\t"));
114
115 // Up to 63 character is allowed.
116 EXPECT_FALSE(TestableFontFileParser::checkPSName(std::string(64, 'a')));
117
118 // Only printable ASCII is allowed.
119 EXPECT_FALSE(TestableFontFileParser::checkPSName("ろぼとふぉんと"));
120 }
121
TEST(FontFileParserTest,parseFontForPSName)122 TEST(FontFileParserTest, parseFontForPSName) {
123 auto minikinFont = std::make_shared<FreeTypeMinikinFontForTest>(getTestFontPath("Ascii.ttf"));
124 auto parser = FontFileParser(minikinFont->GetFontData(), minikinFont->GetFontSize(), 0);
125
126 auto psName = parser.getPostScriptName();
127 EXPECT_TRUE(psName.has_value());
128 EXPECT_EQ("SampleFont-Regular", psName.value());
129 }
130
131 } // namespace
132 } // namespace minikin
133