104 lines
3.0 KiB
C++
104 lines
3.0 KiB
C++
// Copyright (c) 2009-2017 The OTS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "maxp.h"
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// maxp - Maximum Profile
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// http://www.microsoft.com/typography/otspec/maxp.htm
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namespace ots {
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bool OpenTypeMAXP::Parse(const uint8_t *data, size_t length) {
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Buffer table(data, length);
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uint32_t version = 0;
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if (!table.ReadU32(&version)) {
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return Error("Failed to read table version");
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}
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if (version >> 16 > 1) {
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return Error("Unsupported table version 0x%x", version);
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}
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if (!table.ReadU16(&this->num_glyphs)) {
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return Error("Failed to read numGlyphs");
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}
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if (!this->num_glyphs) {
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return Error("numGlyphs is 0");
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}
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if (version >> 16 == 1) {
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this->version_1 = true;
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if (!table.ReadU16(&this->max_points) ||
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!table.ReadU16(&this->max_contours) ||
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!table.ReadU16(&this->max_c_points) ||
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!table.ReadU16(&this->max_c_contours) ||
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!table.ReadU16(&this->max_zones) ||
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!table.ReadU16(&this->max_t_points) ||
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!table.ReadU16(&this->max_storage) ||
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!table.ReadU16(&this->max_fdefs) ||
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!table.ReadU16(&this->max_idefs) ||
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!table.ReadU16(&this->max_stack) ||
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!table.ReadU16(&this->max_size_glyf_instructions) ||
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!table.ReadU16(&this->max_c_components) ||
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!table.ReadU16(&this->max_c_depth)) {
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return Error("Failed to read version 1 table data");
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}
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if (this->max_zones == 0) {
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// workaround for ipa*.ttf Japanese fonts.
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Warning("Bad maxZones: %u", this->max_zones);
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this->max_zones = 1;
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} else if (this->max_zones == 3) {
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// workaround for Ecolier-*.ttf fonts.
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Warning("Bad maxZones: %u", this->max_zones);
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this->max_zones = 2;
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}
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if ((this->max_zones != 1) && (this->max_zones != 2)) {
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return Error("Bad maxZones: %u", this->max_zones);
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}
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} else {
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this->version_1 = false;
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}
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return true;
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}
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bool OpenTypeMAXP::Serialize(OTSStream *out) {
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if (!out->WriteU32(this->version_1 ? 0x00010000 : 0x00005000) ||
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!out->WriteU16(this->num_glyphs)) {
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return Error("Failed to write version or numGlyphs");
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}
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if (!this->version_1) return true;
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if (!out->WriteU16(this->max_points) ||
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!out->WriteU16(this->max_contours) ||
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!out->WriteU16(this->max_c_points) ||
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!out->WriteU16(this->max_c_contours)) {
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return Error("Failed to write maxp");
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}
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if (!out->WriteU16(this->max_zones) ||
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!out->WriteU16(this->max_t_points) ||
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!out->WriteU16(this->max_storage) ||
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!out->WriteU16(this->max_fdefs) ||
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!out->WriteU16(this->max_idefs) ||
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!out->WriteU16(this->max_stack) ||
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!out->WriteU16(this->max_size_glyf_instructions)) {
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return Error("Failed to write more maxp");
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}
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if (!out->WriteU16(this->max_c_components) ||
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!out->WriteU16(this->max_c_depth)) {
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return Error("Failed to write yet more maxp");
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}
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return true;
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}
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} // namespace ots
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