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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "hdmx.h" | 5 #include "hdmx.h" |
6 #include "head.h" | 6 #include "head.h" |
7 #include "maxp.h" | 7 #include "maxp.h" |
8 | 8 |
9 // hdmx - Horizontal Device Metrics | 9 // hdmx - Horizontal Device Metrics |
10 // http://www.microsoft.com/opentype/otspec/hdmx.htm | 10 // http://www.microsoft.com/opentype/otspec/hdmx.htm |
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98 | 98 |
99 bool ots_hdmx_should_serialise(OpenTypeFile *file) { | 99 bool ots_hdmx_should_serialise(OpenTypeFile *file) { |
100 if (!file->hdmx) return false; | 100 if (!file->hdmx) return false; |
101 if (!file->glyf) return false; // this table is not for CFF fonts. | 101 if (!file->glyf) return false; // this table is not for CFF fonts. |
102 return true; | 102 return true; |
103 } | 103 } |
104 | 104 |
105 bool ots_hdmx_serialise(OTSStream *out, OpenTypeFile *file) { | 105 bool ots_hdmx_serialise(OTSStream *out, OpenTypeFile *file) { |
106 OpenTypeHDMX * const hdmx = file->hdmx; | 106 OpenTypeHDMX * const hdmx = file->hdmx; |
107 | 107 |
108 if (!out->WriteU16(hdmx->version) || | 108 const int16_t num_recs = static_cast<int16_t>(hdmx->records.size()); |
109 !out->WriteS16(hdmx->records.size()) || | 109 if (hdmx->records.size() > |
| 110 static_cast<size_t>(std::numeric_limits<int16_t>::max()) || |
| 111 !out->WriteU16(hdmx->version) || |
| 112 !out->WriteS16(num_recs) || |
110 !out->WriteS32(hdmx->size_device_record)) { | 113 !out->WriteS32(hdmx->size_device_record)) { |
111 return OTS_FAILURE(); | 114 return OTS_FAILURE(); |
112 } | 115 } |
113 | 116 |
114 for (unsigned i = 0; i < hdmx->records.size(); ++i) { | 117 for (int16_t i = 0; i < num_recs; ++i) { |
115 const OpenTypeHDMXDeviceRecord& rec = hdmx->records[i]; | 118 const OpenTypeHDMXDeviceRecord& rec = hdmx->records[i]; |
116 if (!out->Write(&rec.pixel_size, 1) || | 119 if (!out->Write(&rec.pixel_size, 1) || |
117 !out->Write(&rec.max_width, 1) || | 120 !out->Write(&rec.max_width, 1) || |
118 !out->Write(&rec.widths[0], rec.widths.size())) { | 121 !out->Write(&rec.widths[0], rec.widths.size())) { |
119 return OTS_FAILURE(); | 122 return OTS_FAILURE(); |
120 } | 123 } |
121 if ((hdmx->pad_len > 0) && | 124 if ((hdmx->pad_len > 0) && |
122 !out->Write((const uint8_t *)"\x00\x00\x00", hdmx->pad_len)) { | 125 !out->Write((const uint8_t *)"\x00\x00\x00", hdmx->pad_len)) { |
123 return OTS_FAILURE(); | 126 return OTS_FAILURE(); |
124 } | 127 } |
125 } | 128 } |
126 | 129 |
127 return true; | 130 return true; |
128 } | 131 } |
129 | 132 |
130 void ots_hdmx_free(OpenTypeFile *file) { | 133 void ots_hdmx_free(OpenTypeFile *file) { |
131 delete file->hdmx; | 134 delete file->hdmx; |
132 } | 135 } |
133 | 136 |
134 } // namespace ots | 137 } // namespace ots |
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