The Tor Browser: gfx/ots/src/vmtx.cc@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 // Copyright (c) 2011 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.

     5 #include "vmtx.h"

     7 #include "gsub.h"

     8 #include "maxp.h"

     9 #include "vhea.h"

    11 // vmtx - Vertical Metrics Table

    12 // http://www.microsoft.com/typography/otspec/vmtx.htm

    14 #define TABLE_NAME "vmtx"

    16 namespace ots {

    18 bool ots_vmtx_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {

    19   Buffer table(data, length);

    20   OpenTypeVMTX *vmtx = new OpenTypeVMTX;

    21   file->vmtx = vmtx;

    23   if (!file->vhea || !file->maxp) {

    24     return OTS_FAILURE_MSG("vhea or maxp table missing as needed by vmtx");

    25   }

    27   if (!ParseMetricsTable(file, &table, file->maxp->num_glyphs,

    28                          &file->vhea->header, &vmtx->metrics)) {

    29     return OTS_FAILURE_MSG("Failed to parse vmtx metrics");

    30   }

    32   return true;

    33 }

    35 bool ots_vmtx_should_serialise(OpenTypeFile *file) {

    36   // vmtx should serialise when vhea and GSUB are preserved.

    37   // See the comment in ots_vhea_should_serialise().

    38   return file->vmtx != NULL && file->vhea != NULL &&

    39       ots_gsub_should_serialise(file);

    40 }

    42 bool ots_vmtx_serialise(OTSStream *out, OpenTypeFile *file) {

    43   if (!SerialiseMetricsTable(file, out, &file->vmtx->metrics)) {

    44     return OTS_FAILURE_MSG("Failed to write vmtx metrics");

    45   }

    46   return true;

    47 }

    49 void ots_vmtx_free(OpenTypeFile *file) {

    50   delete file->vmtx;

    51 }

    53 }  // namespace ots

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