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// 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 "maxp.h"
// maxp - Maximum Profile
// http://www.microsoft.com/typography/otspec/maxp.htm
#define TABLE_NAME "maxp"
namespace ots {
bool ots_maxp_parse(Font *font, const uint8_t *data, size_t length) {
Buffer table(data, length);
OpenTypeMAXP *maxp = new OpenTypeMAXP;
font->maxp = maxp;
uint32_t version = 0;
if (!table.ReadU32(&version)) {
return OTS_FAILURE_MSG("Failed to read version of maxp table");
}
if (version >> 16 > 1) {
return OTS_FAILURE_MSG("Bad maxp version %d", version);
}
if (!table.ReadU16(&maxp->num_glyphs)) {
return OTS_FAILURE_MSG("Failed to read number of glyphs from maxp table");
}
if (!maxp->num_glyphs) {
return OTS_FAILURE_MSG("Bad number of glyphs 0 in maxp table");
}
if (version >> 16 == 1) {
maxp->version_1 = true;
if (!table.ReadU16(&maxp->max_points) ||
!table.ReadU16(&maxp->max_contours) ||
!table.ReadU16(&maxp->max_c_points) ||
!table.ReadU16(&maxp->max_c_contours) ||
!table.ReadU16(&maxp->max_zones) ||
!table.ReadU16(&maxp->max_t_points) ||
!table.ReadU16(&maxp->max_storage) ||
!table.ReadU16(&maxp->max_fdefs) ||
!table.ReadU16(&maxp->max_idefs) ||
!table.ReadU16(&maxp->max_stack) ||
!table.ReadU16(&maxp->max_size_glyf_instructions) ||
!table.ReadU16(&maxp->max_c_components) ||
!table.ReadU16(&maxp->max_c_depth)) {
return OTS_FAILURE_MSG("Failed to read maxp table");
}
if (maxp->max_zones == 0) {
// workaround for ipa*.ttf Japanese fonts.
OTS_WARNING("bad max_zones: %u", maxp->max_zones);
maxp->max_zones = 1;
} else if (maxp->max_zones == 3) {
// workaround for Ecolier-*.ttf fonts.
OTS_WARNING("bad max_zones: %u", maxp->max_zones);
maxp->max_zones = 2;
}
if ((maxp->max_zones != 1) && (maxp->max_zones != 2)) {
return OTS_FAILURE_MSG("Bad max zones %d in maxp", maxp->max_zones);
}
} else {
maxp->version_1 = false;
}
return true;
}
bool ots_maxp_should_serialise(Font *font) {
return font->maxp != NULL;
}
bool ots_maxp_serialise(OTSStream *out, Font *font) {
const OpenTypeMAXP *maxp = font->maxp;
if (!out->WriteU32(maxp->version_1 ? 0x00010000 : 0x00005000) ||
!out->WriteU16(maxp->num_glyphs)) {
return OTS_FAILURE_MSG("Failed to write maxp version or number of glyphs");
}
if (!maxp->version_1) return true;
if (!out->WriteU16(maxp->max_points) ||
!out->WriteU16(maxp->max_contours) ||
!out->WriteU16(maxp->max_c_points) ||
!out->WriteU16(maxp->max_c_contours)) {
return OTS_FAILURE_MSG("Failed to write maxp");
}
if (!out->WriteU16(maxp->max_zones) ||
!out->WriteU16(maxp->max_t_points) ||
!out->WriteU16(maxp->max_storage) ||
!out->WriteU16(maxp->max_fdefs) ||
!out->WriteU16(maxp->max_idefs) ||
!out->WriteU16(maxp->max_stack) ||
!out->WriteU16(maxp->max_size_glyf_instructions)) {
return OTS_FAILURE_MSG("Failed to write more maxp");
}
if (!out->WriteU16(maxp->max_c_components) ||
!out->WriteU16(maxp->max_c_depth)) {
return OTS_FAILURE_MSG("Failed to write yet more maxp");
}
return true;
}
void ots_maxp_reuse(Font *font, Font *other) {
font->maxp = other->maxp;
font->maxp_reused = true;
}
void ots_maxp_free(Font *font) {
delete font->maxp;
}
} // namespace ots
#undef TABLE_NAME
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