1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/ots/src/maxp.cc Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,130 @@
1.4 +// Copyright (c) 2009 The Chromium Authors. All rights reserved.
1.5 +// Use of this source code is governed by a BSD-style license that can be
1.6 +// found in the LICENSE file.
1.7 +
1.8 +#include "maxp.h"
1.9 +
1.10 +// maxp - Maximum Profile
1.11 +// http://www.microsoft.com/typography/otspec/maxp.htm
1.12 +
1.13 +#define TABLE_NAME "maxp"
1.14 +
1.15 +namespace ots {
1.16 +
1.17 +bool ots_maxp_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
1.18 + Buffer table(data, length);
1.19 +
1.20 + OpenTypeMAXP *maxp = new OpenTypeMAXP;
1.21 + file->maxp = maxp;
1.22 +
1.23 + uint32_t version = 0;
1.24 + if (!table.ReadU32(&version)) {
1.25 + return OTS_FAILURE_MSG("Failed to read version of maxp table");
1.26 + }
1.27 +
1.28 + if (version >> 16 > 1) {
1.29 + return OTS_FAILURE_MSG("Bad maxp version %d", version);
1.30 + }
1.31 +
1.32 + if (!table.ReadU16(&maxp->num_glyphs)) {
1.33 + return OTS_FAILURE_MSG("Failed to read number of glyphs from maxp table");
1.34 + }
1.35 +
1.36 + if (!maxp->num_glyphs) {
1.37 + return OTS_FAILURE_MSG("Bad number of glyphs 0 in maxp table");
1.38 + }
1.39 +
1.40 + if (version >> 16 == 1) {
1.41 + maxp->version_1 = true;
1.42 + if (!table.ReadU16(&maxp->max_points) ||
1.43 + !table.ReadU16(&maxp->max_contours) ||
1.44 + !table.ReadU16(&maxp->max_c_points) ||
1.45 + !table.ReadU16(&maxp->max_c_contours) ||
1.46 + !table.ReadU16(&maxp->max_zones) ||
1.47 + !table.ReadU16(&maxp->max_t_points) ||
1.48 + !table.ReadU16(&maxp->max_storage) ||
1.49 + !table.ReadU16(&maxp->max_fdefs) ||
1.50 + !table.ReadU16(&maxp->max_idefs) ||
1.51 + !table.ReadU16(&maxp->max_stack) ||
1.52 + !table.ReadU16(&maxp->max_size_glyf_instructions) ||
1.53 + !table.ReadU16(&maxp->max_c_components) ||
1.54 + !table.ReadU16(&maxp->max_c_depth)) {
1.55 + return OTS_FAILURE_MSG("Failed to read maxp table");
1.56 + }
1.57 +
1.58 + if (maxp->max_zones == 0) {
1.59 + // workaround for ipa*.ttf Japanese fonts.
1.60 + OTS_WARNING("bad max_zones: %u", maxp->max_zones);
1.61 + maxp->max_zones = 1;
1.62 + } else if (maxp->max_zones == 3) {
1.63 + // workaround for Ecolier-*.ttf fonts.
1.64 + OTS_WARNING("bad max_zones: %u", maxp->max_zones);
1.65 + maxp->max_zones = 2;
1.66 + }
1.67 +
1.68 + if ((maxp->max_zones != 1) && (maxp->max_zones != 2)) {
1.69 + return OTS_FAILURE_MSG("Bad max zones %d in maxp", maxp->max_zones);
1.70 + }
1.71 + } else {
1.72 + maxp->version_1 = false;
1.73 + }
1.74 +
1.75 + return true;
1.76 +}
1.77 +
1.78 +bool ots_maxp_should_serialise(OpenTypeFile *file) {
1.79 + return file->maxp != NULL;
1.80 +}
1.81 +
1.82 +bool ots_maxp_serialise(OTSStream *out, OpenTypeFile *file) {
1.83 + const OpenTypeMAXP *maxp = file->maxp;
1.84 +
1.85 + if (!out->WriteU32(maxp->version_1 ? 0x00010000 : 0x00005000) ||
1.86 + !out->WriteU16(maxp->num_glyphs)) {
1.87 + return OTS_FAILURE_MSG("Failed to write maxp version or number of glyphs");
1.88 + }
1.89 +
1.90 + if (!maxp->version_1) return true;
1.91 +
1.92 + if (!out->WriteU16(maxp->max_points) ||
1.93 + !out->WriteU16(maxp->max_contours) ||
1.94 + !out->WriteU16(maxp->max_c_points) ||
1.95 + !out->WriteU16(maxp->max_c_contours)) {
1.96 + return OTS_FAILURE_MSG("Failed to write maxp");
1.97 + }
1.98 +
1.99 + if (g_transcode_hints) {
1.100 + if (!out->WriteU16(maxp->max_zones) ||
1.101 + !out->WriteU16(maxp->max_t_points) ||
1.102 + !out->WriteU16(maxp->max_storage) ||
1.103 + !out->WriteU16(maxp->max_fdefs) ||
1.104 + !out->WriteU16(maxp->max_idefs) ||
1.105 + !out->WriteU16(maxp->max_stack) ||
1.106 + !out->WriteU16(maxp->max_size_glyf_instructions)) {
1.107 + return OTS_FAILURE_MSG("Failed to write more maxp");
1.108 + }
1.109 + } else {
1.110 + if (!out->WriteU16(1) || // max zones
1.111 + !out->WriteU16(0) || // max twilight points
1.112 + !out->WriteU16(0) || // max storage
1.113 + !out->WriteU16(0) || // max function defs
1.114 + !out->WriteU16(0) || // max instruction defs
1.115 + !out->WriteU16(0) || // max stack elements
1.116 + !out->WriteU16(0)) { // max instruction byte count
1.117 + return OTS_FAILURE_MSG("Failed to write more maxp");
1.118 + }
1.119 + }
1.120 +
1.121 + if (!out->WriteU16(maxp->max_c_components) ||
1.122 + !out->WriteU16(maxp->max_c_depth)) {
1.123 + return OTS_FAILURE_MSG("Failed to write yet more maxp");
1.124 + }
1.125 +
1.126 + return true;
1.127 +}
1.128 +
1.129 +void ots_maxp_free(OpenTypeFile *file) {
1.130 + delete file->maxp;
1.131 +}
1.132 +
1.133 +} // namespace ots
