LCOV - code coverage report
Current view: top level - gfx/ots/src - vorg.cc (source / functions) Hit Total Coverage
Test: output.info Lines: 0 54 0.0 %
Date: 2017-07-14 16:53:18 Functions: 0 5 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       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/typography/otspec/vorg.htm
      11             : 
      12             : #define TABLE_NAME "VORG"
      13             : 
      14             : #define DROP_THIS_TABLE(...) \
      15             :   do { \
      16             :     OTS_FAILURE_MSG_(font->file, TABLE_NAME ": " __VA_ARGS__); \
      17             :     OTS_FAILURE_MSG("Table discarded"); \
      18             :     delete font->vorg; \
      19             :     font->vorg = 0; \
      20             :   } while (0)
      21             : 
      22             : namespace ots {
      23             : 
      24           0 : bool ots_vorg_parse(Font *font, const uint8_t *data, size_t length) {
      25           0 :   Buffer table(data, length);
      26           0 :   font->vorg = new OpenTypeVORG;
      27           0 :   OpenTypeVORG * const vorg = font->vorg;
      28             : 
      29             :   uint16_t num_recs;
      30           0 :   if (!table.ReadU16(&vorg->major_version) ||
      31           0 :       !table.ReadU16(&vorg->minor_version) ||
      32           0 :       !table.ReadS16(&vorg->default_vert_origin_y) ||
      33           0 :       !table.ReadU16(&num_recs)) {
      34           0 :     return OTS_FAILURE_MSG("Failed to read header");
      35             :   }
      36           0 :   if (vorg->major_version != 1) {
      37           0 :     DROP_THIS_TABLE("bad major version: %u", vorg->major_version);
      38           0 :     return true;
      39             :   }
      40           0 :   if (vorg->minor_version != 0) {
      41           0 :     DROP_THIS_TABLE("bad minor version: %u", vorg->minor_version);
      42           0 :     return true;
      43             :   }
      44             : 
      45             :   // num_recs might be zero (e.g., DFHSMinchoPro5-W3-Demo.otf).
      46           0 :   if (!num_recs) {
      47           0 :     return true;
      48             :   }
      49             : 
      50           0 :   uint16_t last_glyph_index = 0;
      51           0 :   vorg->metrics.reserve(num_recs);
      52           0 :   for (unsigned i = 0; i < num_recs; ++i) {
      53             :     OpenTypeVORGMetrics rec;
      54             : 
      55           0 :     if (!table.ReadU16(&rec.glyph_index) ||
      56           0 :         !table.ReadS16(&rec.vert_origin_y)) {
      57           0 :       return OTS_FAILURE_MSG("Failed to read record %d", i);
      58             :     }
      59           0 :     if ((i != 0) && (rec.glyph_index <= last_glyph_index)) {
      60           0 :       DROP_THIS_TABLE("the table is not sorted");
      61           0 :       return true;
      62             :     }
      63           0 :     last_glyph_index = rec.glyph_index;
      64             : 
      65           0 :     vorg->metrics.push_back(rec);
      66             :   }
      67             : 
      68           0 :   return true;
      69             : }
      70             : 
      71           0 : bool ots_vorg_should_serialise(Font *font) {
      72           0 :   if (!font->cff) return false;  // this table is not for fonts with TT glyphs.
      73           0 :   return font->vorg != NULL;
      74             : }
      75             : 
      76           0 : bool ots_vorg_serialise(OTSStream *out, Font *font) {
      77           0 :   OpenTypeVORG * const vorg = font->vorg;
      78             :   
      79           0 :   const uint16_t num_metrics = static_cast<uint16_t>(vorg->metrics.size());
      80           0 :   if (num_metrics != vorg->metrics.size() ||
      81           0 :       !out->WriteU16(vorg->major_version) ||
      82           0 :       !out->WriteU16(vorg->minor_version) ||
      83           0 :       !out->WriteS16(vorg->default_vert_origin_y) ||
      84           0 :       !out->WriteU16(num_metrics)) {
      85           0 :     return OTS_FAILURE_MSG("Failed to write table header");
      86             :   }
      87             : 
      88           0 :   for (uint16_t i = 0; i < num_metrics; ++i) {
      89           0 :     const OpenTypeVORGMetrics& rec = vorg->metrics[i];
      90           0 :     if (!out->WriteU16(rec.glyph_index) ||
      91           0 :         !out->WriteS16(rec.vert_origin_y)) {
      92           0 :       return OTS_FAILURE_MSG("Failed to write record %d", i);
      93             :     }
      94             :   }
      95             : 
      96           0 :   return true;
      97             : }
      98             : 
      99           0 : void ots_vorg_reuse(Font *font, Font *other) {
     100           0 :   font->vorg = other->vorg;
     101           0 :   font->vorg_reused = true;
     102           0 : }
     103             : 
     104           0 : void ots_vorg_free(Font *font) {
     105           0 :   delete font->vorg;
     106           0 : }
     107             : 
     108             : }  // namespace ots
     109             : 
     110             : #undef TABLE_NAME
     111             : #undef DROP_THIS_TABLE

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