mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
121 lines
2.9 KiB
C++
121 lines
2.9 KiB
C++
// Copyright (c) 2009 The Chromium Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "hhea.h"
|
|
|
|
#include "head.h"
|
|
#include "maxp.h"
|
|
|
|
// hhea - Horizontal Header
|
|
// http://www.microsoft.com/opentype/otspec/hhea.htm
|
|
|
|
namespace ots {
|
|
|
|
bool ots_hhea_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
|
|
Buffer table(data, length);
|
|
OpenTypeHHEA *hhea = new OpenTypeHHEA;
|
|
file->hhea = hhea;
|
|
|
|
uint32_t version = 0;
|
|
if (!table.ReadU32(&version)) {
|
|
return OTS_FAILURE();
|
|
}
|
|
if (version >> 16 != 1) {
|
|
return OTS_FAILURE();
|
|
}
|
|
|
|
if (!table.ReadS16(&hhea->ascent) ||
|
|
!table.ReadS16(&hhea->descent) ||
|
|
!table.ReadS16(&hhea->linegap) ||
|
|
!table.ReadU16(&hhea->adv_width_max) ||
|
|
!table.ReadS16(&hhea->min_lsb) ||
|
|
!table.ReadS16(&hhea->min_rsb) ||
|
|
!table.ReadS16(&hhea->x_max_extent) ||
|
|
!table.ReadS16(&hhea->caret_slope_rise) ||
|
|
!table.ReadS16(&hhea->caret_slope_run) ||
|
|
!table.ReadS16(&hhea->caret_offset)) {
|
|
return OTS_FAILURE();
|
|
}
|
|
|
|
if (hhea->ascent < 0) {
|
|
OTS_WARNING("bad ascent: %d", hhea->ascent);
|
|
hhea->ascent = 0;
|
|
}
|
|
if (hhea->linegap < 0) {
|
|
OTS_WARNING("bad linegap: %d", hhea->linegap);
|
|
hhea->linegap = 0;
|
|
}
|
|
|
|
if (!file->head) {
|
|
return OTS_FAILURE();
|
|
}
|
|
|
|
// if the font is non-slanted, caret_offset should be zero.
|
|
if (!(file->head->mac_style & 2) &&
|
|
(hhea->caret_offset != 0)) {
|
|
OTS_WARNING("bad caret offset: %d", hhea->caret_offset);
|
|
hhea->caret_offset = 0;
|
|
}
|
|
|
|
// skip the reserved bytes
|
|
if (!table.Skip(8)) {
|
|
return OTS_FAILURE();
|
|
}
|
|
|
|
int16_t data_format;
|
|
if (!table.ReadS16(&data_format)) {
|
|
return OTS_FAILURE();
|
|
}
|
|
if (data_format) {
|
|
return OTS_FAILURE();
|
|
}
|
|
|
|
if (!table.ReadU16(&hhea->num_hmetrics)) {
|
|
return OTS_FAILURE();
|
|
}
|
|
|
|
if (!file->maxp) {
|
|
return OTS_FAILURE();
|
|
}
|
|
|
|
if (hhea->num_hmetrics > file->maxp->num_glyphs) {
|
|
return OTS_FAILURE();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool ots_hhea_should_serialise(OpenTypeFile *file) {
|
|
return file->hhea;
|
|
}
|
|
|
|
bool ots_hhea_serialise(OTSStream *out, OpenTypeFile *file) {
|
|
const OpenTypeHHEA *hhea = file->hhea;
|
|
|
|
if (!out->WriteU32(0x00010000) ||
|
|
!out->WriteS16(hhea->ascent) ||
|
|
!out->WriteS16(hhea->descent) ||
|
|
!out->WriteS16(hhea->linegap) ||
|
|
!out->WriteU16(hhea->adv_width_max) ||
|
|
!out->WriteS16(hhea->min_lsb) ||
|
|
!out->WriteS16(hhea->min_rsb) ||
|
|
!out->WriteS16(hhea->x_max_extent) ||
|
|
!out->WriteS16(hhea->caret_slope_rise) ||
|
|
!out->WriteS16(hhea->caret_slope_run) ||
|
|
!out->WriteS16(hhea->caret_offset) ||
|
|
!out->WriteR64(0) || // reserved
|
|
!out->WriteS16(0) || // metric data format
|
|
!out->WriteU16(hhea->num_hmetrics)) {
|
|
return OTS_FAILURE();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void ots_hhea_free(OpenTypeFile *file) {
|
|
delete file->hhea;
|
|
}
|
|
|
|
} // namespace ots
|