| // 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(OpenTypeFile *file, const uint8_t *data, size_t length) { |
| Buffer table(data, length); |
| |
| OpenTypeMAXP *maxp = new OpenTypeMAXP; |
| file->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(OpenTypeFile *file) { |
| return file->maxp != NULL; |
| } |
| |
| bool ots_maxp_serialise(OTSStream *out, OpenTypeFile *file) { |
| const OpenTypeMAXP *maxp = file->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_free(OpenTypeFile *file) { |
| delete file->maxp; |
| } |
| |
| } // namespace ots |
| |
| #undef TABLE_NAME |