diff options
Diffstat (limited to 'gfx/ots/src/ots.cc')
| -rw-r--r-- | gfx/ots/src/ots.cc | 628 |
1 files changed, 415 insertions, 213 deletions
diff --git a/gfx/ots/src/ots.cc b/gfx/ots/src/ots.cc index 15794475a..38d97a9ed 100644 --- a/gfx/ots/src/ots.cc +++ b/gfx/ots/src/ots.cc @@ -1,4 +1,4 @@ -// Copyright (c) 2009 The Chromium Authors. All rights reserved. +// Copyright (c) 2009-2017 The OTS Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. @@ -14,25 +14,75 @@ #include <map> #include <vector> -#include "woff2_dec.h" +#include <woff2/decode.h> // The OpenType Font File -// http://www.microsoft.com/typography/otspec/cmap.htm +// http://www.microsoft.com/typography/otspec/otff.htm + +#include "avar.h" +#include "cff.h" +#include "cmap.h" +#include "cvar.h" +#include "cvt.h" +#include "fpgm.h" +#include "fvar.h" +#include "gasp.h" +#include "gdef.h" +#include "glyf.h" +#include "gpos.h" +#include "gsub.h" +#include "gvar.h" +#include "hdmx.h" +#include "head.h" +#include "hhea.h" +#include "hmtx.h" +#include "hvar.h" +#include "kern.h" +#include "loca.h" +#include "ltsh.h" +#include "math_.h" +#include "maxp.h" +#include "mvar.h" +#include "name.h" +#include "os2.h" +#include "ots.h" +#include "post.h" +#include "prep.h" +#include "stat.h" +#include "vdmx.h" +#include "vhea.h" +#include "vmtx.h" +#include "vorg.h" +#include "vvar.h" + +// Graphite tables +#ifdef OTS_GRAPHITE +#include "feat.h" +#include "glat.h" +#include "gloc.h" +#include "sile.h" +#include "silf.h" +#include "sill.h" +#endif -namespace { +namespace ots { -// Generate a message with or without a table tag, when 'header' is the OpenTypeFile pointer -#define OTS_FAILURE_MSG_TAG(msg_,tag_) OTS_FAILURE_MSG_TAG_(header, msg_, tag_) -#define OTS_FAILURE_MSG_HDR(msg_) OTS_FAILURE_MSG_(header, msg_) -#define OTS_WARNING_MSG_HDR(msg_) OTS_WARNING_MSG_(header, msg_) +struct Arena { + public: + ~Arena() { + for (auto& hunk : hunks_) { + delete[] hunk; + } + } + uint8_t* Allocate(size_t length) { + uint8_t* p = new uint8_t[length]; + hunks_.push_back(p); + return p; + } -struct OpenTypeTable { - uint32_t tag; - uint32_t chksum; - uint32_t offset; - uint32_t length; - uint32_t uncompressed_length; + private: + std::vector<uint8_t*> hunks_; }; bool CheckTag(uint32_t tag_value) { @@ -46,99 +96,83 @@ bool CheckTag(uint32_t tag_value) { return true; } -struct Arena { - public: - ~Arena() { - for (std::vector<uint8_t*>::iterator - i = hunks_.begin(); i != hunks_.end(); ++i) { - delete[] *i; - } - } +}; // namespace ots - uint8_t* Allocate(size_t length) { - uint8_t* p = new uint8_t[length]; - hunks_.push_back(p); - return p; - } +namespace { + +#define OTS_MSG_TAG_(level,otf_,msg_,tag_) \ + (OTS_MESSAGE_(level,otf_,"%c%c%c%c: %s", OTS_UNTAG(tag_), msg_), false) + +// Generate a message with or without a table tag, when 'header' is the FontFile pointer +#define OTS_FAILURE_MSG_TAG(msg_,tag_) OTS_MSG_TAG_(0, header, msg_, tag_) +#define OTS_FAILURE_MSG_HDR(...) OTS_FAILURE_MSG_(header, __VA_ARGS__) +#define OTS_WARNING_MSG_HDR(...) OTS_WARNING_MSG_(header, __VA_ARGS__) - private: - std::vector<uint8_t*> hunks_; -}; const struct { uint32_t tag; - bool (*parse)(ots::Font *font, const uint8_t *data, size_t length); - bool (*serialise)(ots::OTSStream *out, ots::Font *font); - bool (*should_serialise)(ots::Font *font); - void (*reuse)(ots::Font *font, ots::Font *other); bool required; -} table_parsers[] = { - { OTS_TAG('m','a','x','p'), ots::ots_maxp_parse, ots::ots_maxp_serialise, - ots::ots_maxp_should_serialise, ots::ots_maxp_reuse, true }, - { OTS_TAG('h','e','a','d'), ots::ots_head_parse, ots::ots_head_serialise, - ots::ots_head_should_serialise, ots::ots_head_reuse, true }, - { OTS_TAG('O','S','/','2'), ots::ots_os2_parse, ots::ots_os2_serialise, - ots::ots_os2_should_serialise, ots::ots_os2_reuse, true }, - { OTS_TAG('c','m','a','p'), ots::ots_cmap_parse, ots::ots_cmap_serialise, - ots::ots_cmap_should_serialise, ots::ots_cmap_reuse, true }, - { OTS_TAG('h','h','e','a'), ots::ots_hhea_parse, ots::ots_hhea_serialise, - ots::ots_hhea_should_serialise, ots::ots_hhea_reuse, true }, - { OTS_TAG('h','m','t','x'), ots::ots_hmtx_parse, ots::ots_hmtx_serialise, - ots::ots_hmtx_should_serialise, ots::ots_hmtx_reuse, true }, - { OTS_TAG('n','a','m','e'), ots::ots_name_parse, ots::ots_name_serialise, - ots::ots_name_should_serialise, ots::ots_name_reuse, true }, - { OTS_TAG('p','o','s','t'), ots::ots_post_parse, ots::ots_post_serialise, - ots::ots_post_should_serialise, ots::ots_post_reuse, true }, - { OTS_TAG('l','o','c','a'), ots::ots_loca_parse, ots::ots_loca_serialise, - ots::ots_loca_should_serialise, ots::ots_loca_reuse, false }, - { OTS_TAG('g','l','y','f'), ots::ots_glyf_parse, ots::ots_glyf_serialise, - ots::ots_glyf_should_serialise, ots::ots_glyf_reuse, false }, - { OTS_TAG('C','F','F',' '), ots::ots_cff_parse, ots::ots_cff_serialise, - ots::ots_cff_should_serialise, ots::ots_cff_reuse, false }, - { OTS_TAG('V','D','M','X'), ots::ots_vdmx_parse, ots::ots_vdmx_serialise, - ots::ots_vdmx_should_serialise, ots::ots_vdmx_reuse, false }, - { OTS_TAG('h','d','m','x'), ots::ots_hdmx_parse, ots::ots_hdmx_serialise, - ots::ots_hdmx_should_serialise, ots::ots_hdmx_reuse, false }, - { OTS_TAG('g','a','s','p'), ots::ots_gasp_parse, ots::ots_gasp_serialise, - ots::ots_gasp_should_serialise, ots::ots_gasp_reuse, false }, - { OTS_TAG('c','v','t',' '), ots::ots_cvt_parse, ots::ots_cvt_serialise, - ots::ots_cvt_should_serialise, ots::ots_cvt_reuse, false }, - { OTS_TAG('f','p','g','m'), ots::ots_fpgm_parse, ots::ots_fpgm_serialise, - ots::ots_fpgm_should_serialise, ots::ots_fpgm_reuse, false }, - { OTS_TAG('p','r','e','p'), ots::ots_prep_parse, ots::ots_prep_serialise, - ots::ots_prep_should_serialise, ots::ots_prep_reuse, false }, - { OTS_TAG('L','T','S','H'), ots::ots_ltsh_parse, ots::ots_ltsh_serialise, - ots::ots_ltsh_should_serialise, ots::ots_ltsh_reuse, false }, - { OTS_TAG('V','O','R','G'), ots::ots_vorg_parse, ots::ots_vorg_serialise, - ots::ots_vorg_should_serialise, ots::ots_vorg_reuse, false }, - { OTS_TAG('k','e','r','n'), ots::ots_kern_parse, ots::ots_kern_serialise, - ots::ots_kern_should_serialise, ots::ots_kern_reuse, false }, +} supported_tables[] = { + { OTS_TAG_MAXP, true }, + { OTS_TAG_HEAD, true }, + { OTS_TAG_OS2, true }, + { OTS_TAG_CMAP, true }, + { OTS_TAG_HHEA, true }, + { OTS_TAG_HMTX, true }, + { OTS_TAG_NAME, true }, + { OTS_TAG_POST, true }, + { OTS_TAG_LOCA, false }, + { OTS_TAG_GLYF, false }, + { OTS_TAG_CFF, false }, + { OTS_TAG_VDMX, false }, + { OTS_TAG_HDMX, false }, + { OTS_TAG_GASP, false }, + { OTS_TAG_CVT, false }, + { OTS_TAG_FPGM, false }, + { OTS_TAG_PREP, false }, + { OTS_TAG_LTSH, false }, + { OTS_TAG_VORG, false }, + { OTS_TAG_KERN, false }, + // We need to parse fvar table before other tables that may need to know + // the number of variation axes (if any) + { OTS_TAG_FVAR, false }, + { OTS_TAG_AVAR, false }, + { OTS_TAG_CVAR, false }, + { OTS_TAG_GVAR, false }, + { OTS_TAG_HVAR, false }, + { OTS_TAG_MVAR, false }, + { OTS_TAG_STAT, false }, + { OTS_TAG_VVAR, false }, + { OTS_TAG_CFF2, false }, // We need to parse GDEF table in advance of parsing GSUB/GPOS tables // because they could refer GDEF table. - { OTS_TAG('G','D','E','F'), ots::ots_gdef_parse, ots::ots_gdef_serialise, - ots::ots_gdef_should_serialise, ots::ots_gdef_reuse, false }, - { OTS_TAG('G','P','O','S'), ots::ots_gpos_parse, ots::ots_gpos_serialise, - ots::ots_gpos_should_serialise, ots::ots_gpos_reuse, false }, - { OTS_TAG('G','S','U','B'), ots::ots_gsub_parse, ots::ots_gsub_serialise, - ots::ots_gsub_should_serialise, ots::ots_gsub_reuse, false }, - { OTS_TAG('v','h','e','a'), ots::ots_vhea_parse, ots::ots_vhea_serialise, - ots::ots_vhea_should_serialise, ots::ots_vhea_reuse, false }, - { OTS_TAG('v','m','t','x'), ots::ots_vmtx_parse, ots::ots_vmtx_serialise, - ots::ots_vmtx_should_serialise, ots::ots_vmtx_reuse, false }, - { OTS_TAG('M','A','T','H'), ots::ots_math_parse, ots::ots_math_serialise, - ots::ots_math_should_serialise, ots::ots_math_reuse, false }, - { 0, NULL, NULL, NULL, NULL, false }, + { OTS_TAG_GDEF, false }, + { OTS_TAG_GPOS, false }, + { OTS_TAG_GSUB, false }, + { OTS_TAG_VHEA, false }, + { OTS_TAG_VMTX, false }, + { OTS_TAG_MATH, false }, + // Graphite tables +#ifdef OTS_GRAPHITE + { OTS_TAG_GLOC, false }, + { OTS_TAG_GLAT, false }, + { OTS_TAG_FEAT, false }, + { OTS_TAG_SILF, false }, + { OTS_TAG_SILE, false }, + { OTS_TAG_SILL, false }, +#endif + { 0, false }, }; -bool ProcessGeneric(ots::OpenTypeFile *header, +bool ProcessGeneric(ots::FontFile *header, ots::Font *font, uint32_t signature, ots::OTSStream *output, const uint8_t *data, size_t length, - const std::vector<OpenTypeTable>& tables, + const std::vector<ots::TableEntry>& tables, ots::Buffer& file); -bool ProcessTTF(ots::OpenTypeFile *header, +bool ProcessTTF(ots::FontFile *header, ots::Font *font, ots::OTSStream *output, const uint8_t *data, size_t length, uint32_t offset = 0) { @@ -202,10 +236,10 @@ bool ProcessTTF(ots::OpenTypeFile *header, } // Next up is the list of tables. - std::vector<OpenTypeTable> tables; + std::vector<ots::TableEntry> tables; for (unsigned i = 0; i < font->num_tables; ++i) { - OpenTypeTable table; + ots::TableEntry table; if (!file.ReadU32(&table.tag) || !file.ReadU32(&table.chksum) || !file.ReadU32(&table.offset) || @@ -221,7 +255,7 @@ bool ProcessTTF(ots::OpenTypeFile *header, tables, file); } -bool ProcessTTC(ots::OpenTypeFile *header, +bool ProcessTTC(ots::FontFile *header, ots::OTSStream *output, const uint8_t *data, size_t length, @@ -308,7 +342,7 @@ bool ProcessTTC(ots::OpenTypeFile *header, } } -bool ProcessWOFF(ots::OpenTypeFile *header, +bool ProcessWOFF(ots::FontFile *header, ots::Font *font, ots::OTSStream *output, const uint8_t *data, size_t length) { ots::Buffer file(data, length); @@ -388,14 +422,14 @@ bool ProcessWOFF(ots::OpenTypeFile *header, } // Next up is the list of tables. - std::vector<OpenTypeTable> tables; + std::vector<ots::TableEntry> tables; uint32_t first_index = 0; uint32_t last_index = 0; // Size of sfnt header plus size of table records. uint64_t total_sfnt_size = 12 + 16 * font->num_tables; for (unsigned i = 0; i < font->num_tables; ++i) { - OpenTypeTable table; + ots::TableEntry table; if (!file.ReadU32(&table.tag) || !file.ReadU32(&table.offset) || !file.ReadU32(&table.length) || @@ -463,13 +497,17 @@ bool ProcessWOFF(ots::OpenTypeFile *header, return ProcessGeneric(header, font, woff_tag, output, data, length, tables, file); } -bool ProcessWOFF2(ots::OpenTypeFile *header, +bool ProcessWOFF2(ots::FontFile *header, ots::OTSStream *output, const uint8_t *data, size_t length, uint32_t index) { size_t decompressed_size = woff2::ComputeWOFF2FinalSize(data, length); + if (decompressed_size < length) { + return OTS_FAILURE_MSG_HDR("Size of decompressed WOFF 2.0 is less than compressed size"); + } + if (decompressed_size == 0) { return OTS_FAILURE_MSG_HDR("Size of decompressed WOFF 2.0 is set to 0"); } @@ -493,16 +531,16 @@ bool ProcessWOFF2(ots::OpenTypeFile *header, } } -ots::TableAction GetTableAction(ots::OpenTypeFile *header, uint32_t tag) { +ots::TableAction GetTableAction(const ots::FontFile *header, uint32_t tag) { ots::TableAction action = header->context->GetTableAction(tag); if (action == ots::TABLE_ACTION_DEFAULT) { action = ots::TABLE_ACTION_DROP; for (unsigned i = 0; ; ++i) { - if (table_parsers[i].parse == NULL) break; + if (supported_tables[i].tag == 0) break; - if (table_parsers[i].tag == tag) { + if (supported_tables[i].tag == tag) { action = ots::TABLE_ACTION_SANITIZE; break; } @@ -514,14 +552,14 @@ ots::TableAction GetTableAction(ots::OpenTypeFile *header, uint32_t tag) { } bool GetTableData(const uint8_t *data, - const OpenTypeTable& table, - Arena *arena, + const ots::TableEntry& table, + ots::Arena &arena, size_t *table_length, const uint8_t **table_data) { if (table.uncompressed_length != table.length) { // Compressed table. Need to uncompress into memory first. *table_length = table.uncompressed_length; - *table_data = (*arena).Allocate(*table_length); + *table_data = arena.Allocate(*table_length); uLongf dest_len = *table_length; int r = uncompress((Bytef*) *table_data, &dest_len, data + table.offset, table.length); @@ -537,12 +575,12 @@ bool GetTableData(const uint8_t *data, return true; } -bool ProcessGeneric(ots::OpenTypeFile *header, +bool ProcessGeneric(ots::FontFile *header, ots::Font *font, uint32_t signature, ots::OTSStream *output, const uint8_t *data, size_t length, - const std::vector<OpenTypeTable>& tables, + const std::vector<ots::TableEntry>& tables, ots::Buffer& file) { const size_t data_offset = file.offset(); @@ -560,8 +598,8 @@ bool ProcessGeneric(ots::OpenTypeFile *header, } // all tag names must be built from printable ASCII characters - if (!CheckTag(tables[i].tag)) { - return OTS_FAILURE_MSG_TAG("invalid table tag", tables[i].tag); + if (!ots::CheckTag(tables[i].tag)) { + OTS_WARNING_MSG_HDR("Invalid table tag: 0x%X", tables[i].tag); } // tables must be 4-byte aligned @@ -616,11 +654,6 @@ bool ProcessGeneric(ots::OpenTypeFile *header, return OTS_FAILURE_MSG_HDR("uncompressed sum exceeds 30MB"); } - std::map<uint32_t, OpenTypeTable> table_map; - for (unsigned i = 0; i < font->num_tables; ++i) { - table_map[tables[i].tag] = tables[i]; - } - // check that the tables are not overlapping. std::vector<std::pair<uint32_t, uint8_t> > overlap_checker; for (unsigned i = 0; i < font->num_tables; ++i) { @@ -639,80 +672,66 @@ bool ProcessGeneric(ots::OpenTypeFile *header, } } - Arena arena; + std::map<uint32_t, ots::TableEntry> table_map; + for (unsigned i = 0; i < font->num_tables; ++i) { + table_map[tables[i].tag] = tables[i]; + } + ots::Arena arena; + // Parse known tables first as we need to parse them in specific order. for (unsigned i = 0; ; ++i) { - if (table_parsers[i].parse == NULL) break; - - uint32_t tag = table_parsers[i].tag; - const std::map<uint32_t, OpenTypeTable>::const_iterator it = table_map.find(tag); + if (supported_tables[i].tag == 0) break; - ots::TableAction action = GetTableAction(header, tag); - if (it == table_map.end()) { - if (table_parsers[i].required && action == ots::TABLE_ACTION_SANITIZE) { - return OTS_FAILURE_MSG_TAG("missing required table", table_parsers[i].tag); + uint32_t tag = supported_tables[i].tag; + const auto &it = table_map.find(tag); + if (it == table_map.cend()) { + if (supported_tables[i].required) { + return OTS_FAILURE_MSG_TAG("missing required table", tag); } - continue; - } - - uint32_t input_offset = it->second.offset; - const ots::TableMap::const_iterator ot = header->tables.find(input_offset); - if (ot == header->tables.end()) { - const uint8_t* table_data; - size_t table_length; - - if (!GetTableData(data, it->second, &arena, &table_length, &table_data)) { - return OTS_FAILURE_MSG_TAG("uncompress failed", table_parsers[i].tag); + } else { + if (!font->ParseTable(it->second, data, arena)) { + return OTS_FAILURE_MSG_TAG("Failed to parse table", tag); } + } + } - if (action == ots::TABLE_ACTION_SANITIZE && - !table_parsers[i].parse(font, table_data, table_length)) { - return OTS_FAILURE(); + // Then parse any tables left. + for (const auto &table_entry : tables) { + if (!font->GetTable(table_entry.tag)) { + if (!font->ParseTable(table_entry, data, arena)) { + return OTS_FAILURE_MSG_TAG("Failed to parse table", table_entry.tag); } - } else if (action == ots::TABLE_ACTION_SANITIZE) { - table_parsers[i].reuse(font, ot->second.first); } } - if (font->cff) { + if (font->GetTable(OTS_TAG_CFF) || font->GetTable(OTS_TAG_CFF2)) { // font with PostScript glyph if (font->version != OTS_TAG('O','T','T','O')) { return OTS_FAILURE_MSG_HDR("wrong font version for PostScript glyph data"); } - if (font->glyf || font->loca) { + if (font->GetTable(OTS_TAG_GLYF) || font->GetTable(OTS_TAG_LOCA)) { // mixing outline formats is not recommended return OTS_FAILURE_MSG_HDR("font contains both PS and TT glyphs"); } } else { - if (!font->glyf || !font->loca) { + if (!font->GetTable(OTS_TAG_GLYF) || !font->GetTable(OTS_TAG_LOCA)) { // No TrueType glyph found. -#define PASSTHRU_TABLE(tag_) (table_map.find(tag_) != table_map.end() && \ - GetTableAction(header, tag_) == ots::TABLE_ACTION_PASSTHRU) - // We don't sanitise bitmap table, but don't reject bitmap-only fonts if - // we keep the tables. - if (!PASSTHRU_TABLE(OTS_TAG('C','B','D','T')) || - !PASSTHRU_TABLE(OTS_TAG('C','B','L','C'))) { + // + // We don't sanitize bitmap tables, but don’t reject bitmap-only fonts if + // we are asked to pass them thru. + // Also don’t reject if we are asked to pass glyf/loca thru. + if (!font->GetTable(OTS_TAG('C','B','D','T')) && + !font->GetTable(OTS_TAG('C','B','L','C'))) { return OTS_FAILURE_MSG_HDR("no supported glyph shapes table(s) present"); } -#undef PASSTHRU_TABLE } } uint16_t num_output_tables = 0; - for (std::map<uint32_t, OpenTypeTable>::const_iterator it = table_map.begin(); - it != table_map.end(); ++it) { - ots::TableAction action = GetTableAction(header, it->first); - if (action == ots::TABLE_ACTION_PASSTHRU) { + for (const auto &it : table_map) { + ots::Table *table = font->GetTable(it.first); + if (table != NULL && table->ShouldSerialize()) num_output_tables++; - } else { - for (unsigned i = 0; table_parsers[i].parse != NULL; ++i) { - if (table_parsers[i].tag == it->first && - table_parsers[i].should_serialise(font)) { - num_output_tables++; - break; - } - } - } } uint16_t max_pow2 = 0; @@ -738,85 +757,49 @@ bool ProcessGeneric(ots::OpenTypeFile *header, return OTS_FAILURE_MSG_HDR("error writing output"); } - std::vector<ots::OutputTable> out_tables; + std::vector<ots::TableEntry> out_tables; size_t head_table_offset = 0; - for (std::map<uint32_t, OpenTypeTable>::const_iterator it = table_map.begin(); - it != table_map.end(); ++it) { - uint32_t input_offset = it->second.offset; - const ots::TableMap::const_iterator ot = header->tables.find(input_offset); - if (ot != header->tables.end()) { - ots::OutputTable out = ot->second.second; + for (const auto &it : table_map) { + uint32_t input_offset = it.second.offset; + const auto &ot = header->table_entries.find(input_offset); + if (ot != header->table_entries.end()) { + ots::TableEntry out = ot->second; if (out.tag == OTS_TAG('h','e','a','d')) { head_table_offset = out.offset; } out_tables.push_back(out); } else { - ots::OutputTable out; - out.tag = it->first; + ots::TableEntry out; + out.tag = it.first; out.offset = output->Tell(); if (out.tag == OTS_TAG('h','e','a','d')) { head_table_offset = out.offset; } - ots::TableAction action = GetTableAction(header, it->first); - if (action == ots::TABLE_ACTION_PASSTHRU) { + ots::Table *table = font->GetTable(out.tag); + if (table != NULL && table->ShouldSerialize()) { output->ResetChecksum(); - const uint8_t* table_data; - size_t table_length; - - if (!GetTableData(data, it->second, &arena, &table_length, &table_data)) { - return OTS_FAILURE_MSG_HDR("Failed to uncompress table"); - } - - if (!output->Write(table_data, table_length)) { - return OTS_FAILURE_MSG_HDR("Failed to serialize table"); + if (!table->Serialize(output)) { + return OTS_FAILURE_MSG_TAG("Failed to serialize table", out.tag); } const size_t end_offset = output->Tell(); if (end_offset <= out.offset) { // paranoid check. |end_offset| is supposed to be greater than the offset, // as long as the Tell() interface is implemented correctly. - return OTS_FAILURE_MSG_HDR("error writing output"); + return OTS_FAILURE_MSG_TAG("Table is empty or have -ve size", out.tag); } out.length = end_offset - out.offset; // align tables to four bytes if (!output->Pad((4 - (end_offset & 3)) % 4)) { - return OTS_FAILURE_MSG_HDR("error writing output"); + return OTS_FAILURE_MSG_TAG("Failed to pad table to 4 bytes", out.tag); } out.chksum = output->chksum(); out_tables.push_back(out); - header->tables[input_offset] = std::make_pair(font, out); - } else { - for (unsigned i = 0; table_parsers[i].parse != NULL; ++i) { - if (table_parsers[i].tag == it->first && - table_parsers[i].should_serialise(font)) { - output->ResetChecksum(); - if (!table_parsers[i].serialise(output, font)) { - return OTS_FAILURE_MSG_TAG("failed to serialize table", table_parsers[i].tag); - } - - const size_t end_offset = output->Tell(); - if (end_offset <= out.offset) { - // paranoid check. |end_offset| is supposed to be greater than the offset, - // as long as the Tell() interface is implemented correctly. - return OTS_FAILURE_MSG_HDR("error writing output"); - } - out.length = end_offset - out.offset; - - // align tables to four bytes - if (!output->Pad((4 - (end_offset & 3)) % 4)) { - return OTS_FAILURE_MSG_HDR("error writing output"); - } - out.chksum = output->chksum(); - out_tables.push_back(out); - header->tables[input_offset] = std::make_pair(font, out); - - break; - } - } + header->table_entries[input_offset] = out; } } } @@ -869,6 +852,225 @@ bool ProcessGeneric(ots::OpenTypeFile *header, namespace ots { +FontFile::~FontFile() { + for (const auto& it : tables) { + delete it.second; + } + tables.clear(); +} + +bool Font::ParseTable(const TableEntry& table_entry, const uint8_t* data, + Arena &arena) { + uint32_t tag = table_entry.tag; + TableAction action = GetTableAction(file, tag); + if (action == TABLE_ACTION_DROP) { + return true; + } + + const auto &it = file->tables.find(table_entry); + if (it != file->tables.end()) { + m_tables[tag] = it->second; + return true; + } + + Table *table = NULL; + bool ret = false; + + if (action == TABLE_ACTION_PASSTHRU) { + table = new TablePassthru(this, tag); + } else { + switch (tag) { + case OTS_TAG_AVAR: table = new OpenTypeAVAR(this, tag); break; + case OTS_TAG_CFF: table = new OpenTypeCFF(this, tag); break; + case OTS_TAG_CFF2: table = new OpenTypeCFF2(this, tag); break; + case OTS_TAG_CMAP: table = new OpenTypeCMAP(this, tag); break; + case OTS_TAG_CVAR: table = new OpenTypeCVAR(this, tag); break; + case OTS_TAG_CVT: table = new OpenTypeCVT(this, tag); break; + case OTS_TAG_FPGM: table = new OpenTypeFPGM(this, tag); break; + case OTS_TAG_FVAR: table = new OpenTypeFVAR(this, tag); break; + case OTS_TAG_GASP: table = new OpenTypeGASP(this, tag); break; + case OTS_TAG_GDEF: table = new OpenTypeGDEF(this, tag); break; + case OTS_TAG_GLYF: table = new OpenTypeGLYF(this, tag); break; + case OTS_TAG_GPOS: table = new OpenTypeGPOS(this, tag); break; + case OTS_TAG_GSUB: table = new OpenTypeGSUB(this, tag); break; + case OTS_TAG_GVAR: table = new OpenTypeGVAR(this, tag); break; + case OTS_TAG_HDMX: table = new OpenTypeHDMX(this, tag); break; + case OTS_TAG_HEAD: table = new OpenTypeHEAD(this, tag); break; + case OTS_TAG_HHEA: table = new OpenTypeHHEA(this, tag); break; + case OTS_TAG_HMTX: table = new OpenTypeHMTX(this, tag); break; + case OTS_TAG_HVAR: table = new OpenTypeHVAR(this, tag); break; + case OTS_TAG_KERN: table = new OpenTypeKERN(this, tag); break; + case OTS_TAG_LOCA: table = new OpenTypeLOCA(this, tag); break; + case OTS_TAG_LTSH: table = new OpenTypeLTSH(this, tag); break; + case OTS_TAG_MATH: table = new OpenTypeMATH(this, tag); break; + case OTS_TAG_MAXP: table = new OpenTypeMAXP(this, tag); break; + case OTS_TAG_MVAR: table = new OpenTypeMVAR(this, tag); break; + case OTS_TAG_NAME: table = new OpenTypeNAME(this, tag); break; + case OTS_TAG_OS2: table = new OpenTypeOS2(this, tag); break; + case OTS_TAG_POST: table = new OpenTypePOST(this, tag); break; + case OTS_TAG_PREP: table = new OpenTypePREP(this, tag); break; + case OTS_TAG_STAT: table = new OpenTypeSTAT(this, tag); break; + case OTS_TAG_VDMX: table = new OpenTypeVDMX(this, tag); break; + case OTS_TAG_VHEA: table = new OpenTypeVHEA(this, tag); break; + case OTS_TAG_VMTX: table = new OpenTypeVMTX(this, tag); break; + case OTS_TAG_VORG: table = new OpenTypeVORG(this, tag); break; + case OTS_TAG_VVAR: table = new OpenTypeVVAR(this, tag); break; + // Graphite tables +#ifdef OTS_GRAPHITE + case OTS_TAG_FEAT: table = new OpenTypeFEAT(this, tag); break; + case OTS_TAG_GLAT: table = new OpenTypeGLAT(this, tag); break; + case OTS_TAG_GLOC: table = new OpenTypeGLOC(this, tag); break; + case OTS_TAG_SILE: table = new OpenTypeSILE(this, tag); break; + case OTS_TAG_SILF: table = new OpenTypeSILF(this, tag); break; + case OTS_TAG_SILL: table = new OpenTypeSILL(this, tag); break; +#endif + default: break; + } + } + + if (table) { + const uint8_t* table_data; + size_t table_length; + + ret = GetTableData(data, table_entry, arena, &table_length, &table_data); + if (ret) { + // FIXME: Parsing some tables will fail if the table is not added to + // m_tables first. + m_tables[tag] = table; + ret = table->Parse(table_data, table_length); + if (ret) + file->tables[table_entry] = table; + else + m_tables.erase(tag); + } + } + + if (!ret) + delete table; + + return ret; +} + +Table* Font::GetTable(uint32_t tag) const { + const auto &it = m_tables.find(tag); + if (it != m_tables.end()) + return it->second; + return NULL; +} + +Table* Font::GetTypedTable(uint32_t tag) const { + Table* t = GetTable(tag); + if (t && t->Type() == tag) + return t; + return NULL; +} + +void Font::DropGraphite() { + file->context->Message(0, "Dropping all Graphite tables"); + for (const std::pair<uint32_t, Table*> entry : m_tables) { + if (entry.first == OTS_TAG_FEAT || + entry.first == OTS_TAG_GLAT || + entry.first == OTS_TAG_GLOC || + entry.first == OTS_TAG_SILE || + entry.first == OTS_TAG_SILF || + entry.first == OTS_TAG_SILL) { + entry.second->Drop("Discarding Graphite table"); + } + } + dropped_graphite = true; +} + +void Font::DropVariations() { + file->context->Message(0, "Dropping all Variation tables"); + for (const std::pair<uint32_t, Table*> entry : m_tables) { + if (entry.first == OTS_TAG_AVAR || + entry.first == OTS_TAG_CVAR || + entry.first == OTS_TAG_FVAR || + entry.first == OTS_TAG_GVAR || + entry.first == OTS_TAG_HVAR || + entry.first == OTS_TAG_MVAR || + entry.first == OTS_TAG_STAT || + entry.first == OTS_TAG_VVAR) { + entry.second->Drop("Discarding Variations table"); + } + } + dropped_variations = true; +} + +bool Table::ShouldSerialize() { + return m_shouldSerialize; +} + +void Table::Message(int level, const char *format, va_list va) { + char msg[206] = { OTS_UNTAG(m_tag), ':', ' ' }; + std::vsnprintf(msg + 6, 200, format, va); + m_font->file->context->Message(level, msg); +} + +bool Table::Error(const char *format, ...) { + va_list va; + va_start(va, format); + Message(0, format, va); + va_end(va); + + return false; +} + +bool Table::Warning(const char *format, ...) { + va_list va; + va_start(va, format); + Message(1, format, va); + va_end(va); + + return true; +} + +bool Table::Drop(const char *format, ...) { + m_shouldSerialize = false; + + va_list va; + va_start(va, format); + Message(0, format, va); + m_font->file->context->Message(0, "Table discarded"); + va_end(va); + + return true; +} + +bool Table::DropGraphite(const char *format, ...) { + va_list va; + va_start(va, format); + Message(0, format, va); + va_end(va); + + m_font->DropGraphite(); + return true; +} + +bool Table::DropVariations(const char *format, ...) { + va_list va; + va_start(va, format); + Message(0, format, va); + va_end(va); + + m_font->DropVariations(); + return true; +} + +bool TablePassthru::Parse(const uint8_t *data, size_t length) { + m_data = data; + m_length = length; + return true; +} + +bool TablePassthru::Serialize(OTSStream *out) { + if (!out->Write(m_data, m_length)) { + return Error("Failed to write table"); + } + + return true; +} + bool IsValidVersionTag(uint32_t tag) { return tag == 0x000010000 || // OpenType fonts with CFF data have 'OTTO' tag. @@ -882,7 +1084,7 @@ bool OTSContext::Process(OTSStream *output, const uint8_t *data, size_t length, uint32_t index) { - OpenTypeFile header; + FontFile header; Font font(&header); header.context = this; |