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 3 // found in the LICENSE file. 4 5 #include "vorg.h" 6 7 #include <vector> 8 9 // VORG - Vertical Origin Table 10 // http://www.microsoft.com/opentype/otspec/vorg.htm 11 12 #define DROP_THIS_TABLE \ 13 do { delete file->vorg; file->vorg = 0; } while (0) 14 15 namespace ots { 16 17 bool ots_vorg_parse(OpenTypeFile *file, const uint8_t *data, size_t length) { 18 Buffer table(data, length); 19 file->vorg = new OpenTypeVORG; 20 OpenTypeVORG * const vorg = file->vorg; 21 22 uint16_t num_recs; 23 if (!table.ReadU16(&vorg->major_version) || 24 !table.ReadU16(&vorg->minor_version) || 25 !table.ReadS16(&vorg->default_vert_origin_y) || 26 !table.ReadU16(&num_recs)) { 27 return OTS_FAILURE(); 28 } 29 if (vorg->major_version != 1) { 30 OTS_WARNING("bad major version: %u", vorg->major_version); 31 DROP_THIS_TABLE; 32 return true; 33 } 34 if (vorg->minor_version != 0) { 35 OTS_WARNING("bad minor version: %u", vorg->minor_version); 36 DROP_THIS_TABLE; 37 return true; 38 } 39 40 // num_recs might be zero (e.g., DFHSMinchoPro5-W3-Demo.otf). 41 if (!num_recs) { 42 return true; 43 } 44 45 uint16_t last_glyph_index = 0; 46 vorg->metrics.reserve(num_recs); 47 for (unsigned i = 0; i < num_recs; ++i) { 48 OpenTypeVORGMetrics rec; 49 50 if (!table.ReadU16(&rec.glyph_index) || 51 !table.ReadS16(&rec.vert_origin_y)) { 52 return OTS_FAILURE(); 53 } 54 if ((i != 0) && (rec.glyph_index <= last_glyph_index)) { 55 OTS_WARNING("the table is not sorted"); 56 DROP_THIS_TABLE; 57 return true; 58 } 59 last_glyph_index = rec.glyph_index; 60 61 vorg->metrics.push_back(rec); 62 } 63 64 return true; 65 } 66 67 bool ots_vorg_should_serialise(OpenTypeFile *file) { 68 if (!file->cff) return false; // this table is not for fonts with TT glyphs. 69 return file->vorg != NULL; 70 } 71 72 bool ots_vorg_serialise(OTSStream *out, OpenTypeFile *file) { 73 OpenTypeVORG * const vorg = file->vorg; 74 75 if (!out->WriteU16(vorg->major_version) || 76 !out->WriteU16(vorg->minor_version) || 77 !out->WriteS16(vorg->default_vert_origin_y) || 78 !out->WriteU16(vorg->metrics.size())) { 79 return OTS_FAILURE(); 80 } 81 82 for (unsigned i = 0; i < vorg->metrics.size(); ++i) { 83 const OpenTypeVORGMetrics& rec = vorg->metrics[i]; 84 if (!out->WriteU16(rec.glyph_index) || 85 !out->WriteS16(rec.vert_origin_y)) { 86 return OTS_FAILURE(); 87 } 88 } 89 90 return true; 91 } 92 93 void ots_vorg_free(OpenTypeFile *file) { 94 delete file->vorg; 95 } 96 97 } // namespace ots 98
