diff options
Diffstat (limited to 'gfx/ots/src/cmap.cc')
| -rw-r--r-- | gfx/ots/src/cmap.cc | 342 |
1 files changed, 164 insertions, 178 deletions
diff --git a/gfx/ots/src/cmap.cc b/gfx/ots/src/cmap.cc index 325f8e0d1..72c2a20fc 100644 --- a/gfx/ots/src/cmap.cc +++ b/gfx/ots/src/cmap.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. @@ -15,8 +15,6 @@ // cmap - Character To Glyph Index Mapping Table // http://www.microsoft.com/typography/otspec/cmap.htm -#define TABLE_NAME "cmap" - namespace { struct CMAPSubtableHeader { @@ -56,8 +54,12 @@ const uint32_t kIVSStart = 0xE0100; const uint32_t kIVSEnd = 0xE01EF; const uint32_t kUVSUpperLimit = 0xFFFFFF; +} // namespace + +namespace ots { + // Parses Format 4 tables -bool ParseFormat4(ots::Font *font, int platform, int encoding, +bool OpenTypeCMAP::ParseFormat4(int platform, int encoding, const uint8_t *data, size_t length, uint16_t num_glyphs) { ots::Buffer subtable(data, length); @@ -65,20 +67,22 @@ bool ParseFormat4(ots::Font *font, int platform, int encoding, // whole thing and recompacting it, we validate it and include it verbatim // in the output. - if (!font->os2) { - return OTS_FAILURE_MSG("Required OS/2 table missing"); + OpenTypeOS2 *os2 = static_cast<OpenTypeOS2*>( + GetFont()->GetTypedTable(OTS_TAG_OS2)); + if (!os2) { + return Error("Required OS/2 table missing"); } if (!subtable.Skip(4)) { - return OTS_FAILURE_MSG("Can't read 4 bytes at start of cmap format 4 subtable"); + return Error("Can't read 4 bytes at start of cmap format 4 subtable"); } uint16_t language = 0; if (!subtable.ReadU16(&language)) { - return OTS_FAILURE_MSG("Can't read language"); + return Error("Can't read language"); } if (language) { // Platform ID 3 (windows) subtables should have language '0'. - return OTS_FAILURE_MSG("Languages should be 0 (%d)", language); + return Error("Languages should be 0 (%d)", language); } uint16_t segcountx2, search_range, entry_selector, range_shift; @@ -87,16 +91,16 @@ bool ParseFormat4(ots::Font *font, int platform, int encoding, !subtable.ReadU16(&search_range) || !subtable.ReadU16(&entry_selector) || !subtable.ReadU16(&range_shift)) { - return OTS_FAILURE_MSG("Failed to read subcmap structure"); + return Error("Failed to read subcmap structure"); } if (segcountx2 & 1 || search_range & 1) { - return OTS_FAILURE_MSG("Bad subcmap structure"); + return Error("Bad subcmap structure"); } const uint16_t segcount = segcountx2 >> 1; // There must be at least one segment according the spec. if (segcount < 1) { - return OTS_FAILURE_MSG("Segcount < 1 (%d)", segcount); + return Error("Segcount < 1 (%d)", segcount); } // log2segcount is the maximal x s.t. 2^x < segcount @@ -107,48 +111,48 @@ bool ParseFormat4(ots::Font *font, int platform, int encoding, const uint16_t expected_search_range = 2 * 1u << log2segcount; if (expected_search_range != search_range) { - return OTS_FAILURE_MSG("expected search range != search range (%d != %d)", expected_search_range, search_range); + return Error("expected search range != search range (%d != %d)", expected_search_range, search_range); } if (entry_selector != log2segcount) { - return OTS_FAILURE_MSG("entry selector != log2(segement count) (%d != %d)", entry_selector, log2segcount); + return Error("entry selector != log2(segement count) (%d != %d)", entry_selector, log2segcount); } const uint16_t expected_range_shift = segcountx2 - search_range; if (range_shift != expected_range_shift) { - return OTS_FAILURE_MSG("unexpected range shift (%d != %d)", range_shift, expected_range_shift); + return Error("unexpected range shift (%d != %d)", range_shift, expected_range_shift); } std::vector<Subtable314Range> ranges(segcount); for (unsigned i = 0; i < segcount; ++i) { if (!subtable.ReadU16(&ranges[i].end_range)) { - return OTS_FAILURE_MSG("Failed to read segment %d", i); + return Error("Failed to read segment %d", i); } } uint16_t padding; if (!subtable.ReadU16(&padding)) { - return OTS_FAILURE_MSG("Failed to read cmap subtable segment padding"); + return Error("Failed to read cmap subtable segment padding"); } if (padding) { - return OTS_FAILURE_MSG("Non zero cmap subtable segment padding (%d)", padding); + return Error("Non zero cmap subtable segment padding (%d)", padding); } for (unsigned i = 0; i < segcount; ++i) { if (!subtable.ReadU16(&ranges[i].start_range)) { - return OTS_FAILURE_MSG("Failed to read segment start range %d", i); + return Error("Failed to read segment start range %d", i); } } for (unsigned i = 0; i < segcount; ++i) { if (!subtable.ReadS16(&ranges[i].id_delta)) { - return OTS_FAILURE_MSG("Failed to read segment delta %d", i); + return Error("Failed to read segment delta %d", i); } } for (unsigned i = 0; i < segcount; ++i) { ranges[i].id_range_offset_offset = subtable.offset(); if (!subtable.ReadU16(&ranges[i].id_range_offset)) { - return OTS_FAILURE_MSG("Failed to read segment range offset %d", i); + return Error("Failed to read segment range offset %d", i); } if (ranges[i].id_range_offset & 1) { @@ -156,12 +160,12 @@ bool ParseFormat4(ots::Font *font, int platform, int encoding, // for 0xFFFF-0xFFFF range. // (e.g., many fonts in http://www.princexml.com/fonts/) if (i == segcount - 1u) { - OTS_WARNING("bad id_range_offset"); + Warning("bad id_range_offset"); ranges[i].id_range_offset = 0; // The id_range_offset value in the transcoded font will not change // since this table is not actually "transcoded" yet. } else { - return OTS_FAILURE_MSG("Bad segment offset (%d)", ranges[i].id_range_offset); + return Error("Bad segment offset (%d)", ranges[i].id_range_offset); } } } @@ -176,36 +180,36 @@ bool ParseFormat4(ots::Font *font, int platform, int encoding, (ranges[i].end_range == 0xffff)) { // Some fonts (e.g., Germania.ttf) have multiple 0xffff terminators. // We'll accept them as an exception. - OTS_WARNING("multiple 0xffff terminators found"); + Warning("multiple 0xffff terminators found"); continue; } // Note: some Linux fonts (e.g., LucidaSansOblique.ttf, bsmi00lp.ttf) have // unsorted table... if (ranges[i].end_range <= ranges[i - 1].end_range) { - return OTS_FAILURE_MSG("Out of order end range (%d <= %d)", ranges[i].end_range, ranges[i-1].end_range); + return Error("Out of order end range (%d <= %d)", ranges[i].end_range, ranges[i-1].end_range); } if (ranges[i].start_range <= ranges[i - 1].end_range) { - return OTS_FAILURE_MSG("out of order start range (%d <= %d)", ranges[i].start_range, ranges[i-1].end_range); + return Error("out of order start range (%d <= %d)", ranges[i].start_range, ranges[i-1].end_range); } // On many fonts, the value of {first, last}_char_index are incorrect. // Fix them. - if (font->os2->first_char_index != 0xFFFF && + if (os2->table.first_char_index != 0xFFFF && ranges[i].start_range != 0xFFFF && - font->os2->first_char_index > ranges[i].start_range) { - font->os2->first_char_index = ranges[i].start_range; + os2->table.first_char_index > ranges[i].start_range) { + os2->table.first_char_index = ranges[i].start_range; } - if (font->os2->last_char_index != 0xFFFF && + if (os2->table.last_char_index != 0xFFFF && ranges[i].end_range != 0xFFFF && - font->os2->last_char_index < ranges[i].end_range) { - font->os2->last_char_index = ranges[i].end_range; + os2->table.last_char_index < ranges[i].end_range) { + os2->table.last_char_index = ranges[i].end_range; } } // The last range must end at 0xffff if (ranges[segcount - 1].start_range != 0xffff || ranges[segcount - 1].end_range != 0xffff) { - return OTS_FAILURE_MSG("Final segment start and end must be 0xFFFF (0x%04X-0x%04X)", + return Error("Final segment start and end must be 0xFFFF (0x%04X-0x%04X)", ranges[segcount - 1].start_range, ranges[segcount - 1].end_range); } @@ -219,7 +223,7 @@ bool ParseFormat4(ots::Font *font, int platform, int encoding, // this is explictly allowed to overflow in the spec const uint16_t glyph = code_point + ranges[i].id_delta; if (glyph >= num_glyphs) { - return OTS_FAILURE_MSG("Range glyph reference too high (%d > %d)", glyph, num_glyphs - 1); + return Error("Range glyph reference too high (%d > %d)", glyph, num_glyphs - 1); } } else { const uint16_t range_delta = code_point - ranges[i].start_range; @@ -230,13 +234,13 @@ bool ParseFormat4(ots::Font *font, int platform, int encoding, range_delta * 2; // We need to be able to access a 16-bit value from this offset if (glyph_id_offset + 1 >= length) { - return OTS_FAILURE_MSG("bad glyph id offset (%d > %ld)", glyph_id_offset, length); + return Error("bad glyph id offset (%d > %ld)", glyph_id_offset, length); } uint16_t glyph; std::memcpy(&glyph, data + glyph_id_offset, 2); - glyph = ntohs(glyph); + glyph = ots_ntohs(glyph); if (glyph >= num_glyphs) { - return OTS_FAILURE_MSG("Range glyph reference too high (%d > %d)", glyph, num_glyphs - 1); + return Error("Range glyph reference too high (%d > %d)", glyph, num_glyphs - 1); } } } @@ -245,85 +249,85 @@ bool ParseFormat4(ots::Font *font, int platform, int encoding, // We accept the table. // TODO(yusukes): transcode the subtable. if (platform == 3 && encoding == 0) { - font->cmap->subtable_3_0_4_data = data; - font->cmap->subtable_3_0_4_length = length; + this->subtable_3_0_4_data = data; + this->subtable_3_0_4_length = length; } else if (platform == 3 && encoding == 1) { - font->cmap->subtable_3_1_4_data = data; - font->cmap->subtable_3_1_4_length = length; + this->subtable_3_1_4_data = data; + this->subtable_3_1_4_length = length; } else if (platform == 0 && encoding == 3) { - font->cmap->subtable_0_3_4_data = data; - font->cmap->subtable_0_3_4_length = length; + this->subtable_0_3_4_data = data; + this->subtable_0_3_4_length = length; } else { - return OTS_FAILURE_MSG("Unknown cmap subtable type (platform=%d, encoding=%d)", platform, encoding); + return Error("Unknown cmap subtable type (platform=%d, encoding=%d)", platform, encoding); } return true; } -bool Parse31012(ots::Font *font, - const uint8_t *data, size_t length, uint16_t num_glyphs) { +bool OpenTypeCMAP::Parse31012(const uint8_t *data, size_t length, + uint16_t num_glyphs) { ots::Buffer subtable(data, length); // Format 12 tables are simple. We parse these and fully serialise them // later. if (!subtable.Skip(8)) { - return OTS_FAILURE_MSG("failed to skip the first 8 bytes of format 12 subtable"); + return Error("failed to skip the first 8 bytes of format 12 subtable"); } uint32_t language = 0; if (!subtable.ReadU32(&language)) { - return OTS_FAILURE_MSG("can't read format 12 subtable language"); + return Error("can't read format 12 subtable language"); } if (language) { - return OTS_FAILURE_MSG("format 12 subtable language should be zero (%d)", language); + return Error("format 12 subtable language should be zero (%d)", language); } uint32_t num_groups = 0; if (!subtable.ReadU32(&num_groups)) { - return OTS_FAILURE_MSG("can't read number of format 12 subtable groups"); + return Error("can't read number of format 12 subtable groups"); } if (num_groups == 0 || subtable.remaining() / 12 < num_groups) { - return OTS_FAILURE_MSG("Bad format 12 subtable group count %d", num_groups); + return Error("Bad format 12 subtable group count %d", num_groups); } std::vector<ots::OpenTypeCMAPSubtableRange> &groups - = font->cmap->subtable_3_10_12; + = this->subtable_3_10_12; groups.resize(num_groups); for (unsigned i = 0; i < num_groups; ++i) { if (!subtable.ReadU32(&groups[i].start_range) || !subtable.ReadU32(&groups[i].end_range) || !subtable.ReadU32(&groups[i].start_glyph_id)) { - return OTS_FAILURE_MSG("can't read format 12 subtable group"); + return Error("can't read format 12 subtable group"); } if (groups[i].start_range > kUnicodeUpperLimit || groups[i].end_range > kUnicodeUpperLimit || groups[i].start_glyph_id > 0xFFFF) { - return OTS_FAILURE_MSG("bad format 12 subtable group (startCharCode=0x%4X, endCharCode=0x%4X, startGlyphID=%d)", + return Error("bad format 12 subtable group (startCharCode=0x%4X, endCharCode=0x%4X, startGlyphID=%d)", groups[i].start_range, groups[i].end_range, groups[i].start_glyph_id); } // We assert that the glyph value is within range. Because of the range // limits, above, we don't need to worry about overflow. if (groups[i].end_range < groups[i].start_range) { - return OTS_FAILURE_MSG("format 12 subtable group endCharCode before startCharCode (0x%4X < 0x%4X)", + return Error("format 12 subtable group endCharCode before startCharCode (0x%4X < 0x%4X)", groups[i].end_range, groups[i].start_range); } if ((groups[i].end_range - groups[i].start_range) + groups[i].start_glyph_id > num_glyphs) { - return OTS_FAILURE_MSG("bad format 12 subtable group startGlyphID (%d)", groups[i].start_glyph_id); + return Error("bad format 12 subtable group startGlyphID (%d)", groups[i].start_glyph_id); } } // the groups must be sorted by start code and may not overlap for (unsigned i = 1; i < num_groups; ++i) { if (groups[i].start_range <= groups[i - 1].start_range) { - return OTS_FAILURE_MSG("out of order format 12 subtable group (startCharCode=0x%4X <= startCharCode=0x%4X of previous group)", + return Error("out of order format 12 subtable group (startCharCode=0x%4X <= startCharCode=0x%4X of previous group)", groups[i].start_range, groups[i-1].start_range); } if (groups[i].start_range <= groups[i - 1].end_range) { - return OTS_FAILURE_MSG("overlapping format 12 subtable groups (startCharCode=0x%4X <= endCharCode=0x%4X of previous group)", + return Error("overlapping format 12 subtable groups (startCharCode=0x%4X <= endCharCode=0x%4X of previous group)", groups[i].start_range, groups[i-1].end_range); } } @@ -331,44 +335,43 @@ bool Parse31012(ots::Font *font, return true; } -bool Parse31013(ots::Font *font, - const uint8_t *data, size_t length, uint16_t num_glyphs) { +bool OpenTypeCMAP::Parse31013(const uint8_t *data, size_t length, + uint16_t num_glyphs) { ots::Buffer subtable(data, length); // Format 13 tables are simple. We parse these and fully serialise them // later. if (!subtable.Skip(8)) { - return OTS_FAILURE_MSG("Bad cmap subtable length"); + return Error("Bad cmap subtable length"); } uint32_t language = 0; if (!subtable.ReadU32(&language)) { - return OTS_FAILURE_MSG("Can't read cmap subtable language"); + return Error("Can't read cmap subtable language"); } if (language) { - return OTS_FAILURE_MSG("Cmap subtable language should be zero but is %d", language); + return Error("Cmap subtable language should be zero but is %d", language); } uint32_t num_groups = 0; if (!subtable.ReadU32(&num_groups)) { - return OTS_FAILURE_MSG("Can't read number of groups in a cmap subtable"); + return Error("Can't read number of groups in a cmap subtable"); } // We limit the number of groups in the same way as in 3.10.12 tables. See // the comment there in if (num_groups == 0 || subtable.remaining() / 12 < num_groups) { - return OTS_FAILURE_MSG("Bad format 13 subtable group count %d", num_groups); + return Error("Bad format 13 subtable group count %d", num_groups); } - std::vector<ots::OpenTypeCMAPSubtableRange> &groups - = font->cmap->subtable_3_10_13; + std::vector<ots::OpenTypeCMAPSubtableRange> &groups = this->subtable_3_10_13; groups.resize(num_groups); for (unsigned i = 0; i < num_groups; ++i) { if (!subtable.ReadU32(&groups[i].start_range) || !subtable.ReadU32(&groups[i].end_range) || !subtable.ReadU32(&groups[i].start_glyph_id)) { - return OTS_FAILURE_MSG("Can't read subrange structure in a cmap subtable"); + return Error("Can't read subrange structure in a cmap subtable"); } // We conservatively limit all of the values to protect some parsers from @@ -376,29 +379,29 @@ bool Parse31013(ots::Font *font, if (groups[i].start_range > kUnicodeUpperLimit || groups[i].end_range > kUnicodeUpperLimit || groups[i].start_glyph_id > 0xFFFF) { - return OTS_FAILURE_MSG("Bad subrange with start_range=%d, end_range=%d, start_glyph_id=%d", groups[i].start_range, groups[i].end_range, groups[i].start_glyph_id); + return Error("Bad subrange with start_range=%d, end_range=%d, start_glyph_id=%d", groups[i].start_range, groups[i].end_range, groups[i].start_glyph_id); } if (groups[i].start_glyph_id >= num_glyphs) { - return OTS_FAILURE_MSG("Subrange starting glyph id too high (%d > %d)", groups[i].start_glyph_id, num_glyphs); + return Error("Subrange starting glyph id too high (%d > %d)", groups[i].start_glyph_id, num_glyphs); } } // the groups must be sorted by start code and may not overlap for (unsigned i = 1; i < num_groups; ++i) { if (groups[i].start_range <= groups[i - 1].start_range) { - return OTS_FAILURE_MSG("Overlapping subrange starts (%d >= %d)", groups[i]. start_range, groups[i-1].start_range); + return Error("Overlapping subrange starts (%d >= %d)", groups[i]. start_range, groups[i-1].start_range); } if (groups[i].start_range <= groups[i - 1].end_range) { - return OTS_FAILURE_MSG("Overlapping subranges (%d <= %d)", groups[i].start_range, groups[i-1].end_range); + return Error("Overlapping subranges (%d <= %d)", groups[i].start_range, groups[i-1].end_range); } } return true; } -bool Parse0514(ots::Font *font, - const uint8_t *data, size_t length, uint16_t num_glyphs) { +bool OpenTypeCMAP::Parse0514(const uint8_t *data, size_t length, + uint16_t num_glyphs) { // Unicode Variation Selector table ots::Buffer subtable(data, length); @@ -407,26 +410,26 @@ bool Parse0514(ots::Font *font, // Skip format (USHORT) and length (ULONG) if (!subtable.Skip(6)) { - return OTS_FAILURE_MSG("Can't read start of cmap subtable"); + return Error("Can't read start of cmap subtable"); } uint32_t num_records = 0; if (!subtable.ReadU32(&num_records)) { - return OTS_FAILURE_MSG("Can't read number of records in cmap subtable"); + return Error("Can't read number of records in cmap subtable"); } if (num_records == 0 || num_records > kMaxCMAPSelectorRecords) { - return OTS_FAILURE_MSG("Bad format 14 subtable records count %d", num_records); + return Error("Bad format 14 subtable records count %d", num_records); } std::vector<ots::OpenTypeCMAPSubtableVSRecord>& records - = font->cmap->subtable_0_5_14; + = this->subtable_0_5_14; records.resize(num_records); for (unsigned i = 0; i < num_records; ++i) { if (!subtable.ReadU24(&records[i].var_selector) || !subtable.ReadU32(&records[i].default_offset) || !subtable.ReadU32(&records[i].non_default_offset)) { - return OTS_FAILURE_MSG("Can't read record structure of record %d in cmap subtale", i); + return Error("Can't read record structure of record %d in cmap subtale", i); } // Checks the value of variation selector if (!((records[i].var_selector >= kMongolianVSStart && @@ -435,24 +438,24 @@ bool Parse0514(ots::Font *font, records[i].var_selector <= kVSEnd) || (records[i].var_selector >= kIVSStart && records[i].var_selector <= kIVSEnd))) { - return OTS_FAILURE_MSG("Bad record variation selector (%04X) in record %i", records[i].var_selector, i); + return Error("Bad record variation selector (%04X) in record %i", records[i].var_selector, i); } if (i > 0 && records[i-1].var_selector >= records[i].var_selector) { - return OTS_FAILURE_MSG("Out of order variation selector (%04X >= %04X) in record %d", records[i-1].var_selector, records[i].var_selector, i); + return Error("Out of order variation selector (%04X >= %04X) in record %d", records[i-1].var_selector, records[i].var_selector, i); } // Checks offsets if (!records[i].default_offset && !records[i].non_default_offset) { - return OTS_FAILURE_MSG("No default aoffset in variation selector record %d", i); + return Error("No default aoffset in variation selector record %d", i); } if (records[i].default_offset && records[i].default_offset >= length) { - return OTS_FAILURE_MSG("Default offset too high (%d >= %ld) in record %d", records[i].default_offset, length, i); + return Error("Default offset too high (%d >= %ld) in record %d", records[i].default_offset, length, i); } if (records[i].non_default_offset && records[i].non_default_offset >= length) { - return OTS_FAILURE_MSG("Non default offset too high (%d >= %ld) in record %d", records[i].non_default_offset, length, i); + return Error("Non default offset too high (%d >= %ld) in record %d", records[i].non_default_offset, length, i); } } @@ -462,10 +465,10 @@ bool Parse0514(ots::Font *font, subtable.set_offset(records[i].default_offset); uint32_t num_ranges = 0; if (!subtable.ReadU32(&num_ranges)) { - return OTS_FAILURE_MSG("Can't read number of ranges in record %d", i); + return Error("Can't read number of ranges in record %d", i); } if (num_ranges == 0 || subtable.remaining() / 4 < num_ranges) { - return OTS_FAILURE_MSG("Bad number of ranges (%d) in record %d", num_ranges, i); + return Error("Bad number of ranges (%d) in record %d", num_ranges, i); } uint32_t last_unicode_value = 0; @@ -476,7 +479,7 @@ bool Parse0514(ots::Font *font, for (unsigned j = 0; j < num_ranges; ++j) { if (!subtable.ReadU24(&ranges[j].unicode_value) || !subtable.ReadU8(&ranges[j].additional_count)) { - return OTS_FAILURE_MSG("Can't read range info in variation selector record %d", i); + return Error("Can't read range info in variation selector record %d", i); } const uint32_t check_value = ranges[j].unicode_value + ranges[j].additional_count; @@ -485,7 +488,7 @@ bool Parse0514(ots::Font *font, check_value > kUVSUpperLimit || (last_unicode_value && ranges[j].unicode_value <= last_unicode_value)) { - return OTS_FAILURE_MSG("Bad Unicode value *%04X) in variation selector range %d record %d", ranges[j].unicode_value, j, i); + return Error("Bad Unicode value *%04X) in variation selector range %d record %d", ranges[j].unicode_value, j, i); } last_unicode_value = check_value; } @@ -496,10 +499,10 @@ bool Parse0514(ots::Font *font, subtable.set_offset(records[i].non_default_offset); uint32_t num_mappings = 0; if (!subtable.ReadU32(&num_mappings)) { - return OTS_FAILURE_MSG("Can't read number of mappings in variation selector record %d", i); + return Error("Can't read number of mappings in variation selector record %d", i); } if (num_mappings == 0 || subtable.remaining() / 5 < num_mappings) { - return OTS_FAILURE_MSG("Bad number of mappings (%d) in variation selector record %d", num_mappings, i); + return Error("Bad number of mappings (%d) in variation selector record %d", num_mappings, i); } uint32_t last_unicode_value = 0; @@ -510,14 +513,14 @@ bool Parse0514(ots::Font *font, for (unsigned j = 0; j < num_mappings; ++j) { if (!subtable.ReadU24(&mappings[j].unicode_value) || !subtable.ReadU16(&mappings[j].glyph_id)) { - return OTS_FAILURE_MSG("Can't read mapping %d in variation selector record %d", j, i); + return Error("Can't read mapping %d in variation selector record %d", j, i); } if (mappings[j].glyph_id == 0 || mappings[j].unicode_value == 0 || mappings[j].unicode_value > kUnicodeUpperLimit || (last_unicode_value && mappings[j].unicode_value <= last_unicode_value)) { - return OTS_FAILURE_MSG("Bad mapping (%04X -> %d) in mapping %d of variation selector %d", mappings[j].unicode_value, mappings[j].glyph_id, j, i); + return Error("Bad mapping (%04X -> %d) in mapping %d of variation selector %d", mappings[j].unicode_value, mappings[j].glyph_id, j, i); } last_unicode_value = mappings[j].unicode_value; } @@ -525,60 +528,55 @@ bool Parse0514(ots::Font *font, } if (subtable.offset() != length) { - return OTS_FAILURE_MSG("Bad subtable offset (%ld != %ld)", subtable.offset(), length); + return Error("Bad subtable offset (%ld != %ld)", subtable.offset(), length); } - font->cmap->subtable_0_5_14_length = subtable.offset(); + this->subtable_0_5_14_length = subtable.offset(); return true; } -bool Parse100(ots::Font *font, const uint8_t *data, size_t length) { +bool OpenTypeCMAP::Parse100(const uint8_t *data, size_t length) { // Mac Roman table ots::Buffer subtable(data, length); if (!subtable.Skip(4)) { - return OTS_FAILURE_MSG("Bad cmap subtable"); + return Error("Bad cmap subtable"); } uint16_t language = 0; if (!subtable.ReadU16(&language)) { - return OTS_FAILURE_MSG("Can't read language in cmap subtable"); + return Error("Can't read language in cmap subtable"); } if (language) { // simsun.ttf has non-zero language id. - OTS_WARNING("language id should be zero: %u", language); + Warning("language id should be zero: %u", language); } - font->cmap->subtable_1_0_0.reserve(kFormat0ArraySize); + this->subtable_1_0_0.reserve(kFormat0ArraySize); for (size_t i = 0; i < kFormat0ArraySize; ++i) { uint8_t glyph_id = 0; if (!subtable.ReadU8(&glyph_id)) { - return OTS_FAILURE_MSG("Can't read glyph id at array[%ld] in cmap subtable", i); + return Error("Can't read glyph id at array[%ld] in cmap subtable", i); } - font->cmap->subtable_1_0_0.push_back(glyph_id); + this->subtable_1_0_0.push_back(glyph_id); } return true; } -} // namespace - -namespace ots { - -bool ots_cmap_parse(Font *font, const uint8_t *data, size_t length) { +bool OpenTypeCMAP::Parse(const uint8_t *data, size_t length) { Buffer table(data, length); - font->cmap = new OpenTypeCMAP; uint16_t version = 0; uint16_t num_tables = 0; if (!table.ReadU16(&version) || !table.ReadU16(&num_tables)) { - return OTS_FAILURE_MSG("Can't read structure of cmap"); + return Error("Can't read structure of cmap"); } if (version != 0) { - return OTS_FAILURE_MSG("Non zero cmap version (%d)", version); + return Error("Non zero cmap version (%d)", version); } if (!num_tables) { - return OTS_FAILURE_MSG("No subtables in cmap!"); + return Error("No subtables in cmap!"); } std::vector<CMAPSubtableHeader> subtable_headers; @@ -591,7 +589,7 @@ bool ots_cmap_parse(Font *font, const uint8_t *data, size_t length) { if (!table.ReadU16(&subt.platform) || !table.ReadU16(&subt.encoding) || !table.ReadU32(&subt.offset)) { - return OTS_FAILURE_MSG("Can't read subtable information cmap subtable %d", i); + return Error("Can't read subtable information cmap subtable %d", i); } subtable_headers.push_back(subt); @@ -602,11 +600,11 @@ bool ots_cmap_parse(Font *font, const uint8_t *data, size_t length) { // make sure that all the offsets are valid. for (unsigned i = 0; i < num_tables; ++i) { if (subtable_headers[i].offset > 1024 * 1024 * 1024) { - return OTS_FAILURE_MSG("Bad subtable offset in cmap subtable %d", i); + return Error("Bad subtable offset in cmap subtable %d", i); } if (subtable_headers[i].offset < data_offset || subtable_headers[i].offset >= length) { - return OTS_FAILURE_MSG("Bad subtable offset (%d) in cmap subtable %d", subtable_headers[i].offset, i); + return Error("Bad subtable offset (%d) in cmap subtable %d", subtable_headers[i].offset, i); } } @@ -615,7 +613,7 @@ bool ots_cmap_parse(Font *font, const uint8_t *data, size_t length) { for (unsigned i = 0; i < num_tables; ++i) { table.set_offset(subtable_headers[i].offset); if (!table.ReadU16(&subtable_headers[i].format)) { - return OTS_FAILURE_MSG("Can't read cmap subtable header format %d", i); + return Error("Can't read cmap subtable header format %d", i); } uint16_t len = 0; @@ -624,10 +622,10 @@ bool ots_cmap_parse(Font *font, const uint8_t *data, size_t length) { case 0: case 4: if (!table.ReadU16(&len)) { - return OTS_FAILURE_MSG("Can't read cmap subtable %d length", i); + return Error("Can't read cmap subtable %d length", i); } if (!table.ReadU16(&lang)) { - return OTS_FAILURE_MSG("Can't read cmap subtable %d language", i); + return Error("Can't read cmap subtable %d language", i); } subtable_headers[i].length = len; subtable_headers[i].language = lang; @@ -635,18 +633,18 @@ bool ots_cmap_parse(Font *font, const uint8_t *data, size_t length) { case 12: case 13: if (!table.Skip(2)) { - return OTS_FAILURE_MSG("Bad cmap subtable %d structure", i); + return Error("Bad cmap subtable %d structure", i); } if (!table.ReadU32(&subtable_headers[i].length)) { - return OTS_FAILURE_MSG("Can read cmap subtable %d length", i); + return Error("Can read cmap subtable %d length", i); } if (!table.ReadU32(&subtable_headers[i].language)) { - return OTS_FAILURE_MSG("Can't read cmap subtable %d language", i); + return Error("Can't read cmap subtable %d language", i); } break; case 14: if (!table.ReadU32(&subtable_headers[i].length)) { - return OTS_FAILURE_MSG("Can't read cmap subtable %d length", i); + return Error("Can't read cmap subtable %d length", i); } subtable_headers[i].language = 0; break; @@ -664,7 +662,7 @@ bool ots_cmap_parse(Font *font, const uint8_t *data, size_t length) { (subtable_headers[i - 1].encoding > subtable_headers[i].encoding || (subtable_headers[i - 1].encoding == subtable_headers[i].encoding && subtable_headers[i - 1].language > subtable_headers[i].language)))) - OTS_WARNING("subtable %d with platform ID %d, encoding ID %d, language ID %d " + Warning("subtable %d with platform ID %d, encoding ID %d, language ID %d " "following subtable with platform ID %d, encoding ID %d, language ID %d", i, subtable_headers[i].platform, @@ -679,14 +677,14 @@ bool ots_cmap_parse(Font *font, const uint8_t *data, size_t length) { for (unsigned i = 0; i < num_tables; ++i) { if (!subtable_headers[i].length) continue; if (subtable_headers[i].length > 1024 * 1024 * 1024) { - return OTS_FAILURE_MSG("Bad cmap subtable %d length", i); + return Error("Bad cmap subtable %d length", i); } // We know that both the offset and length are < 1GB, so the following // addition doesn't overflow const uint32_t end_byte = subtable_headers[i].offset + subtable_headers[i].length; if (end_byte > length) { - return OTS_FAILURE_MSG("Over long cmap subtable %d @ %d for %d", i, subtable_headers[i].offset, subtable_headers[i].length); + return Error("Over long cmap subtable %d @ %d for %d", i, subtable_headers[i].offset, subtable_headers[i].length); } } @@ -714,16 +712,18 @@ bool ots_cmap_parse(Font *font, const uint8_t *data, size_t length) { for (unsigned i = 0; i < overlap_checker.size(); ++i) { overlap_count += (overlap_checker[i].second ? 1 : -1); if (overlap_count > 1) { - return OTS_FAILURE_MSG("Excessive overlap count %d", overlap_count); + return Error("Excessive overlap count %d", overlap_count); } } // we grab the number of glyphs in the file from the maxp table to make sure // that the character map isn't referencing anything beyound this range. - if (!font->maxp) { - return OTS_FAILURE_MSG("No maxp table in font! Needed by cmap."); + OpenTypeMAXP *maxp = static_cast<OpenTypeMAXP*>( + GetFont()->GetTypedTable(OTS_TAG_MAXP)); + if (!maxp) { + return Error("No maxp table in font! Needed by cmap."); } - const uint16_t num_glyphs = font->maxp->num_glyphs; + const uint16_t num_glyphs = maxp->num_glyphs; // We only support a subset of the possible character map tables. Microsoft // 'strongly recommends' that everyone supports the Unicode BMP table with @@ -760,29 +760,30 @@ bool ots_cmap_parse(Font *font, const uint8_t *data, size_t length) { // table actually points to MS symbol data and thus should be parsed as // 3-0-4 table (e.g., marqueem.ttf and quixotic.ttf). This error will be // recovered in ots_cmap_serialise(). - if (!ParseFormat4(font, 3, 1, data + subtable_headers[i].offset, + if (!ParseFormat4(3, 1, data + subtable_headers[i].offset, subtable_headers[i].length, num_glyphs)) { - return OTS_FAILURE_MSG("Failed to parse format 4 cmap subtable %d", i); + return Error("Failed to parse format 4 cmap subtable %d", i); } } else if ((subtable_headers[i].encoding == 3) && (subtable_headers[i].format == 4)) { // parse and output the 0-3-4 table as 0-3-4 table. - if (!ParseFormat4(font, 0, 3, data + subtable_headers[i].offset, + if (!ParseFormat4(0, 3, data + subtable_headers[i].offset, subtable_headers[i].length, num_glyphs)) { - return OTS_FAILURE_MSG("Failed to parse format 4 cmap subtable %d", i); + return Error("Failed to parse format 4 cmap subtable %d", i); } - } else if ((subtable_headers[i].encoding == 3) && + } else if ((subtable_headers[i].encoding == 3 || + subtable_headers[i].encoding == 4) && (subtable_headers[i].format == 12)) { - // parse and output the 0-3-12 table as 3-10-12 table. - if (!Parse31012(font, data + subtable_headers[i].offset, + // parse and output the 0-3-12 or 0-4-12 tables as 3-10-12 table. + if (!Parse31012(data + subtable_headers[i].offset, subtable_headers[i].length, num_glyphs)) { - return OTS_FAILURE_MSG("Failed to parse format 12 cmap subtable %d", i); + return Error("Failed to parse format 12 cmap subtable %d", i); } } else if ((subtable_headers[i].encoding == 5) && (subtable_headers[i].format == 14)) { - if (!Parse0514(font, data + subtable_headers[i].offset, + if (!Parse0514(data + subtable_headers[i].offset, subtable_headers[i].length, num_glyphs)) { - return OTS_FAILURE_MSG("Failed to parse format 14 cmap subtable %d", i); + return Error("Failed to parse format 14 cmap subtable %d", i); } } } else if (subtable_headers[i].platform == 1) { @@ -791,7 +792,7 @@ bool ots_cmap_parse(Font *font, const uint8_t *data, size_t length) { if ((subtable_headers[i].encoding == 0) && (subtable_headers[i].format == 0)) { // parse and output the 1-0-0 table. - if (!Parse100(font, data + subtable_headers[i].offset, + if (!Parse100(data + subtable_headers[i].offset, subtable_headers[i].length)) { return OTS_FAILURE(); } @@ -804,7 +805,7 @@ bool ots_cmap_parse(Font *font, const uint8_t *data, size_t length) { case 1: if (subtable_headers[i].format == 4) { // parse 3-0-4 or 3-1-4 table. - if (!ParseFormat4(font, subtable_headers[i].platform, + if (!ParseFormat4(subtable_headers[i].platform, subtable_headers[i].encoding, data + subtable_headers[i].offset, subtable_headers[i].length, num_glyphs)) { @@ -814,14 +815,14 @@ bool ots_cmap_parse(Font *font, const uint8_t *data, size_t length) { break; case 10: if (subtable_headers[i].format == 12) { - font->cmap->subtable_3_10_12.clear(); - if (!Parse31012(font, data + subtable_headers[i].offset, + this->subtable_3_10_12.clear(); + if (!Parse31012(data + subtable_headers[i].offset, subtable_headers[i].length, num_glyphs)) { return OTS_FAILURE(); } } else if (subtable_headers[i].format == 13) { - font->cmap->subtable_3_10_13.clear(); - if (!Parse31013(font, data + subtable_headers[i].offset, + this->subtable_3_10_13.clear(); + if (!Parse31013(data + subtable_headers[i].offset, subtable_headers[i].length, num_glyphs)) { return OTS_FAILURE(); } @@ -834,20 +835,16 @@ bool ots_cmap_parse(Font *font, const uint8_t *data, size_t length) { return true; } -bool ots_cmap_should_serialise(Font *font) { - return font->cmap != NULL; -} - -bool ots_cmap_serialise(OTSStream *out, Font *font) { - const bool have_034 = font->cmap->subtable_0_3_4_data != NULL; - const bool have_0514 = font->cmap->subtable_0_5_14.size() != 0; - const bool have_100 = font->cmap->subtable_1_0_0.size() != 0; - const bool have_304 = font->cmap->subtable_3_0_4_data != NULL; +bool OpenTypeCMAP::Serialize(OTSStream *out) { + const bool have_034 = this->subtable_0_3_4_data != NULL; + const bool have_0514 = this->subtable_0_5_14.size() != 0; + const bool have_100 = this->subtable_1_0_0.size() != 0; + const bool have_304 = this->subtable_3_0_4_data != NULL; // MS Symbol and MS Unicode tables should not co-exist. // See the comment above in 0-0-4 parser. - const bool have_314 = (!have_304) && font->cmap->subtable_3_1_4_data; - const bool have_31012 = font->cmap->subtable_3_10_12.size() != 0; - const bool have_31013 = font->cmap->subtable_3_10_13.size() != 0; + const bool have_314 = (!have_304) && this->subtable_3_1_4_data; + const bool have_31012 = this->subtable_3_10_12.size() != 0; + const bool have_31013 = this->subtable_3_10_13.size() != 0; const uint16_t num_subtables = static_cast<uint16_t>(have_034) + static_cast<uint16_t>(have_0514) + static_cast<uint16_t>(have_100) + @@ -860,7 +857,7 @@ bool ots_cmap_serialise(OTSStream *out, Font *font) { // Some fonts don't have 3-0-4 MS Symbol nor 3-1-4 Unicode BMP tables // (e.g., old fonts for Mac). We don't support them. if (!have_304 && !have_314 && !have_034 && !have_31012 && !have_31013) { - return OTS_FAILURE_MSG("no supported subtables were found"); + return Error("no supported subtables were found"); } if (!out->WriteU16(0) || @@ -875,8 +872,8 @@ bool ots_cmap_serialise(OTSStream *out, Font *font) { const off_t offset_034 = out->Tell(); if (have_034) { - if (!out->Write(font->cmap->subtable_0_3_4_data, - font->cmap->subtable_0_3_4_length)) { + if (!out->Write(this->subtable_0_3_4_data, + this->subtable_0_3_4_length)) { return OTS_FAILURE(); } } @@ -884,10 +881,10 @@ bool ots_cmap_serialise(OTSStream *out, Font *font) { const off_t offset_0514 = out->Tell(); if (have_0514) { const std::vector<ots::OpenTypeCMAPSubtableVSRecord> &records - = font->cmap->subtable_0_5_14; + = this->subtable_0_5_14; const unsigned num_records = records.size(); if (!out->WriteU16(14) || - !out->WriteU32(font->cmap->subtable_0_5_14_length) || + !out->WriteU32(this->subtable_0_5_14_length) || !out->WriteU32(num_records)) { return OTS_FAILURE(); } @@ -939,23 +936,23 @@ bool ots_cmap_serialise(OTSStream *out, Font *font) { !out->WriteU16(0)) { // language return OTS_FAILURE(); } - if (!out->Write(&(font->cmap->subtable_1_0_0[0]), kFormat0ArraySize)) { + if (!out->Write(&(this->subtable_1_0_0[0]), kFormat0ArraySize)) { return OTS_FAILURE(); } } const off_t offset_304 = out->Tell(); if (have_304) { - if (!out->Write(font->cmap->subtable_3_0_4_data, - font->cmap->subtable_3_0_4_length)) { + if (!out->Write(this->subtable_3_0_4_data, + this->subtable_3_0_4_length)) { return OTS_FAILURE(); } } const off_t offset_314 = out->Tell(); if (have_314) { - if (!out->Write(font->cmap->subtable_3_1_4_data, - font->cmap->subtable_3_1_4_length)) { + if (!out->Write(this->subtable_3_1_4_data, + this->subtable_3_1_4_length)) { return OTS_FAILURE(); } } @@ -963,7 +960,7 @@ bool ots_cmap_serialise(OTSStream *out, Font *font) { const off_t offset_31012 = out->Tell(); if (have_31012) { std::vector<OpenTypeCMAPSubtableRange> &groups - = font->cmap->subtable_3_10_12; + = this->subtable_3_10_12; const unsigned num_groups = groups.size(); if (!out->WriteU16(12) || !out->WriteU16(0) || @@ -985,7 +982,7 @@ bool ots_cmap_serialise(OTSStream *out, Font *font) { const off_t offset_31013 = out->Tell(); if (have_31013) { std::vector<OpenTypeCMAPSubtableRange> &groups - = font->cmap->subtable_3_10_13; + = this->subtable_3_10_13; const unsigned num_groups = groups.size(); if (!out->WriteU16(13) || !out->WriteU16(0) || @@ -1074,15 +1071,4 @@ bool ots_cmap_serialise(OTSStream *out, Font *font) { return true; } -void ots_cmap_reuse(Font *font, Font *other) { - font->cmap = other->cmap; - font->cmap_reused = true; -} - -void ots_cmap_free(Font *font) { - delete font->cmap; -} - } // namespace ots - -#undef TABLE_NAME |