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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkFontDescriptor.h" | 8 #include "SkFontDescriptor.h" |
9 #include "SkStream.h" | 9 #include "SkStream.h" |
10 #include "SkData.h" | 10 #include "SkData.h" |
11 | 11 |
12 enum { | 12 enum { |
13 // these must match the sfnt 'name' enums | 13 // these must match the sfnt 'name' enums |
14 kFontFamilyName = 0x01, | 14 kFontFamilyName = 0x01, |
15 kFullName = 0x04, | 15 kFullName = 0x04, |
16 kPostscriptName = 0x06, | 16 kPostscriptName = 0x06, |
17 | 17 |
18 // These count backwards from 0xFF, so as not to collide with the SFNT | 18 // These count backwards from 0xFF, so as not to collide with the SFNT |
19 // defines for names in its 'name' table. | 19 // defines for names in its 'name' table. |
20 kFontAxes = 0xFC, | |
21 kFontIndex = 0xFD, | 20 kFontIndex = 0xFD, |
22 kFontFileName = 0xFE, // Remove when MIN_PICTURE_VERSION > 41 | 21 kFontFileName = 0xFE, // Remove when MIN_PICTURE_VERSION > 41 |
23 kSentinel = 0xFF, | 22 kSentinel = 0xFF, |
24 }; | 23 }; |
25 | 24 |
26 SkFontDescriptor::SkFontDescriptor(SkTypeface::Style style) : fStyle(style) { } | 25 SkFontDescriptor::SkFontDescriptor(SkTypeface::Style style) : fFontIndex(0), fSt
yle(style) { } |
27 | 26 |
28 static void read_string(SkStream* stream, SkString* string) { | 27 static void read_string(SkStream* stream, SkString* string) { |
29 const uint32_t length = SkToU32(stream->readPackedUInt()); | 28 const uint32_t length = SkToU32(stream->readPackedUInt()); |
30 if (length > 0) { | 29 if (length > 0) { |
31 string->resize(length); | 30 string->resize(length); |
32 stream->read(string->writable_str(), length); | 31 stream->read(string->writable_str(), length); |
33 } | 32 } |
34 } | 33 } |
35 | 34 |
36 // Remove when MIN_PICTURE_VERSION > 41 | 35 // Remove when MIN_PICTURE_VERSION > 41 |
37 static void skip_string(SkStream* stream) { | 36 static void skip_string(SkStream* stream) { |
38 const uint32_t length = SkToU32(stream->readPackedUInt()); | 37 const uint32_t length = SkToU32(stream->readPackedUInt()); |
39 if (length > 0) { | 38 if (length > 0) { |
40 stream->skip(length); | 39 stream->skip(length); |
41 } | 40 } |
42 } | 41 } |
43 | 42 |
44 static void write_string(SkWStream* stream, const SkString& string, uint32_t id)
{ | 43 static void write_string(SkWStream* stream, const SkString& string, |
| 44 uint32_t id) { |
45 if (!string.isEmpty()) { | 45 if (!string.isEmpty()) { |
46 stream->writePackedUInt(id); | 46 stream->writePackedUInt(id); |
47 stream->writePackedUInt(string.size()); | 47 stream->writePackedUInt(string.size()); |
48 stream->write(string.c_str(), string.size()); | 48 stream->write(string.c_str(), string.size()); |
49 } | 49 } |
50 } | 50 } |
51 | 51 |
52 static size_t read_uint(SkStream* stream) { | 52 static size_t read_uint(SkStream* stream) { |
53 return stream->readPackedUInt(); | 53 return stream->readPackedUInt(); |
54 } | 54 } |
55 | 55 |
56 static void write_uint(SkWStream* stream, size_t n, uint32_t id) { | 56 static void write_uint(SkWStream* stream, size_t n, uint32_t id) { |
57 stream->writePackedUInt(id); | 57 stream->writePackedUInt(id); |
58 stream->writePackedUInt(n); | 58 stream->writePackedUInt(n); |
59 } | 59 } |
60 | 60 |
61 SkFontDescriptor::SkFontDescriptor(SkStream* stream) { | 61 SkFontDescriptor::SkFontDescriptor(SkStream* stream) : fFontIndex(0) { |
62 fStyle = (SkTypeface::Style)stream->readPackedUInt(); | 62 fStyle = (SkTypeface::Style)stream->readPackedUInt(); |
63 | 63 |
64 SkAutoSTMalloc<4, SkFixed> axis; | |
65 size_t axisCount = 0; | |
66 size_t index = 0; | |
67 for (size_t id; (id = stream->readPackedUInt()) != kSentinel;) { | 64 for (size_t id; (id = stream->readPackedUInt()) != kSentinel;) { |
68 switch (id) { | 65 switch (id) { |
69 case kFontFamilyName: | 66 case kFontFamilyName: |
70 read_string(stream, &fFamilyName); | 67 read_string(stream, &fFamilyName); |
71 break; | 68 break; |
72 case kFullName: | 69 case kFullName: |
73 read_string(stream, &fFullName); | 70 read_string(stream, &fFullName); |
74 break; | 71 break; |
75 case kPostscriptName: | 72 case kPostscriptName: |
76 read_string(stream, &fPostscriptName); | 73 read_string(stream, &fPostscriptName); |
77 break; | 74 break; |
78 case kFontAxes: | |
79 axisCount = read_uint(stream); | |
80 axis.reset(axisCount); | |
81 for (size_t i = 0; i < axisCount; ++i) { | |
82 axis[i] = read_uint(stream); | |
83 } | |
84 break; | |
85 case kFontIndex: | 75 case kFontIndex: |
86 index = read_uint(stream); | 76 fFontIndex = read_uint(stream); |
87 break; | 77 break; |
88 case kFontFileName: // Remove when MIN_PICTURE_VERSION > 41 | 78 case kFontFileName: // Remove when MIN_PICTURE_VERSION > 41 |
89 skip_string(stream); | 79 skip_string(stream); |
90 break; | 80 break; |
91 default: | 81 default: |
92 SkDEBUGFAIL("Unknown id used by a font descriptor"); | 82 SkDEBUGFAIL("Unknown id used by a font descriptor"); |
93 return; | 83 return; |
94 } | 84 } |
95 } | 85 } |
96 | 86 |
97 size_t length = stream->readPackedUInt(); | 87 size_t length = stream->readPackedUInt(); |
98 if (length > 0) { | 88 if (length > 0) { |
99 SkAutoTUnref<SkData> data(SkData::NewUninitialized(length)); | 89 SkAutoTUnref<SkData> data(SkData::NewUninitialized(length)); |
100 if (stream->read(data->writable_data(), length) == length) { | 90 if (stream->read(data->writable_data(), length) == length) { |
101 fFontData.reset(new SkFontData(SkNEW_ARGS(SkMemoryStream, (data)), i
ndex, | 91 fFontData.reset(SkNEW_ARGS(SkMemoryStream, (data))); |
102 axis, axisCount)); | |
103 } | 92 } |
104 } | 93 } |
105 } | 94 } |
106 | 95 |
107 void SkFontDescriptor::serialize(SkWStream* stream) { | 96 void SkFontDescriptor::serialize(SkWStream* stream) { |
108 stream->writePackedUInt(fStyle); | 97 stream->writePackedUInt(fStyle); |
109 | 98 |
110 write_string(stream, fFamilyName, kFontFamilyName); | 99 write_string(stream, fFamilyName, kFontFamilyName); |
111 write_string(stream, fFullName, kFullName); | 100 write_string(stream, fFullName, kFullName); |
112 write_string(stream, fPostscriptName, kPostscriptName); | 101 write_string(stream, fPostscriptName, kPostscriptName); |
113 if (fFontData.get()) { | 102 if (fFontIndex) { |
114 if (fFontData->getIndex()) { | 103 write_uint(stream, fFontIndex, kFontIndex); |
115 write_uint(stream, fFontData->getIndex(), kFontIndex); | |
116 } | |
117 if (fFontData->getAxisCount()) { | |
118 write_uint(stream, fFontData->getAxisCount(), kFontAxes); | |
119 for (int i = 0; i < fFontData->getAxisCount(); ++i) { | |
120 stream->writePackedUInt(fFontData->getAxis()[i]); | |
121 } | |
122 } | |
123 } | 104 } |
124 | 105 |
125 stream->writePackedUInt(kSentinel); | 106 stream->writePackedUInt(kSentinel); |
126 | 107 |
127 if (fFontData.get() && fFontData->hasStream()) { | 108 if (fFontData) { |
128 SkAutoTDelete<SkStreamAsset> fontData(fFontData->detachStream()); | 109 size_t length = fFontData->getLength(); |
129 size_t length = fontData->getLength(); | |
130 stream->writePackedUInt(length); | 110 stream->writePackedUInt(length); |
131 stream->writeStream(fontData, length); | 111 stream->writeStream(fFontData, length); |
132 } else { | 112 } else { |
133 stream->writePackedUInt(0); | 113 stream->writePackedUInt(0); |
134 } | 114 } |
135 } | 115 } |
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