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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 "post.h" | 5 #include "post.h" |
6 | 6 |
7 #include "maxp.h" | 7 #include "maxp.h" |
8 | 8 |
9 // post - PostScript | 9 // post - PostScript |
10 // http://www.microsoft.com/opentype/otspec/post.htm | 10 // http://www.microsoft.com/opentype/otspec/post.htm |
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69 if (num_glyphs != file->maxp->num_glyphs) { | 69 if (num_glyphs != file->maxp->num_glyphs) { |
70 // Note: Fixedsys500c.ttf seems to have inconsistent num_glyphs values. | 70 // Note: Fixedsys500c.ttf seems to have inconsistent num_glyphs values. |
71 return OTS_FAILURE(); | 71 return OTS_FAILURE(); |
72 } | 72 } |
73 | 73 |
74 post->glyph_name_index.resize(num_glyphs); | 74 post->glyph_name_index.resize(num_glyphs); |
75 for (unsigned i = 0; i < num_glyphs; ++i) { | 75 for (unsigned i = 0; i < num_glyphs; ++i) { |
76 if (!table.ReadU16(&post->glyph_name_index[i])) { | 76 if (!table.ReadU16(&post->glyph_name_index[i])) { |
77 return OTS_FAILURE(); | 77 return OTS_FAILURE(); |
78 } | 78 } |
79 if (post->glyph_name_index[i] >= 32768) { | 79 // Note: A strict interpretation of the specification requires name indexes |
80 // Note: droid_arialuni.ttf fails this test. | 80 // are less than 32768. This, however, excludes fonts like unifont.ttf |
81 return OTS_FAILURE(); // reserved area. | 81 // which cover all of unicode. |
82 } | |
83 } | 82 } |
84 | 83 |
85 // Now we have an array of Pascal strings. We have to check that they are all | 84 // Now we have an array of Pascal strings. We have to check that they are all |
86 // valid and read them in. | 85 // valid and read them in. |
87 const size_t strings_offset = table.offset(); | 86 const size_t strings_offset = table.offset(); |
88 const uint8_t *strings = data + strings_offset; | 87 const uint8_t *strings = data + strings_offset; |
89 const uint8_t *strings_end = data + length; | 88 const uint8_t *strings_end = data + length; |
90 | 89 |
91 for (;;) { | 90 for (;;) { |
92 if (strings == strings_end) break; | 91 if (strings == strings_end) break; |
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172 } | 171 } |
173 | 172 |
174 return true; | 173 return true; |
175 } | 174 } |
176 | 175 |
177 void ots_post_free(OpenTypeFile *file) { | 176 void ots_post_free(OpenTypeFile *file) { |
178 delete file->post; | 177 delete file->post; |
179 } | 178 } |
180 | 179 |
181 } // namespace ots | 180 } // namespace ots |
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