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-rw-r--r--gfx/ots/src/cff.cc1375
1 files changed, 844 insertions, 531 deletions
diff --git a/gfx/ots/src/cff.cc b/gfx/ots/src/cff.cc
index 23b6dadac..b0affd510 100644
--- a/gfx/ots/src/cff.cc
+++ b/gfx/ots/src/cff.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012-2017 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.
@@ -9,7 +9,8 @@
#include <vector>
#include "maxp.h"
-#include "cff_type2_charstring.h"
+#include "cff_charstring.h"
+#include "variations.h"
// CFF - PostScript font program (Compact Font Format) table
// http://www.microsoft.com/typography/otspec/cff.htm
@@ -28,6 +29,7 @@ enum DICT_OPERAND_TYPE {
enum DICT_DATA_TYPE {
DICT_DATA_TOPLEVEL,
DICT_DATA_FDARRAY,
+ DICT_DATA_PRIVATE,
};
enum FONT_FORMAT {
@@ -39,7 +41,9 @@ enum FONT_FORMAT {
// see Appendix. A
const size_t kNStdString = 390;
-bool ReadOffset(ots::Buffer *table, uint8_t off_size, uint32_t *offset) {
+typedef std::pair<uint32_t, DICT_OPERAND_TYPE> Operand;
+
+bool ReadOffset(ots::Buffer &table, uint8_t off_size, uint32_t *offset) {
if (off_size > 4) {
return OTS_FAILURE();
}
@@ -47,7 +51,7 @@ bool ReadOffset(ots::Buffer *table, uint8_t off_size, uint32_t *offset) {
uint32_t tmp32 = 0;
for (unsigned i = 0; i < off_size; ++i) {
uint8_t tmp8 = 0;
- if (!table->ReadU8(&tmp8)) {
+ if (!table.ReadU8(&tmp8)) {
return OTS_FAILURE();
}
tmp32 <<= 8;
@@ -57,39 +61,47 @@ bool ReadOffset(ots::Buffer *table, uint8_t off_size, uint32_t *offset) {
return true;
}
-bool ParseIndex(ots::Buffer *table, ots::CFFIndex *index) {
- index->off_size = 0;
- index->offsets.clear();
+bool ParseIndex(ots::Buffer &table, ots::CFFIndex &index, bool cff2 = false) {
+ index.off_size = 0;
+ index.offsets.clear();
- if (!table->ReadU16(&(index->count))) {
- return OTS_FAILURE();
+ if (cff2) {
+ if (!table.ReadU32(&(index.count))) {
+ return OTS_FAILURE();
+ }
+ } else {
+ uint16_t count;
+ if (!table.ReadU16(&count)) {
+ return OTS_FAILURE();
+ }
+ index.count = count;
}
- if (index->count == 0) {
+
+ if (index.count == 0) {
// An empty INDEX.
- index->offset_to_next = table->offset();
+ index.offset_to_next = table.offset();
return true;
}
- if (!table->ReadU8(&(index->off_size))) {
+ if (!table.ReadU8(&(index.off_size))) {
return OTS_FAILURE();
}
- if ((index->off_size == 0) ||
- (index->off_size > 4)) {
+ if (index.off_size < 1 || index.off_size > 4) {
return OTS_FAILURE();
}
- const size_t array_size = (index->count + 1) * index->off_size;
+ const size_t array_size = (index.count + 1) * index.off_size;
// less than ((64k + 1) * 4), thus does not overflow.
- const size_t object_data_offset = table->offset() + array_size;
+ const size_t object_data_offset = table.offset() + array_size;
// does not overflow too, since offset() <= 1GB.
- if (object_data_offset >= table->length()) {
+ if (object_data_offset >= table.length()) {
return OTS_FAILURE();
}
- for (unsigned i = 0; i <= index->count; ++i) { // '<=' is not a typo.
+ for (unsigned i = 0; i <= index.count; ++i) { // '<=' is not a typo.
uint32_t rel_offset = 0;
- if (!ReadOffset(table, index->off_size, &rel_offset)) {
+ if (!ReadOffset(table, index.off_size, &rel_offset)) {
return OTS_FAILURE();
}
if (rel_offset < 1) {
@@ -99,60 +111,56 @@ bool ParseIndex(ots::Buffer *table, ots::CFFIndex *index) {
return OTS_FAILURE();
}
- if (rel_offset > table->length()) {
+ if (rel_offset > table.length()) {
return OTS_FAILURE();
}
// does not underflow.
- if (object_data_offset > table->length() - (rel_offset - 1)) {
+ if (object_data_offset > table.length() - (rel_offset - 1)) {
return OTS_FAILURE();
}
- index->offsets.push_back(
+ index.offsets.push_back(
object_data_offset + (rel_offset - 1)); // less than length(), 1GB.
}
- for (unsigned i = 1; i < index->offsets.size(); ++i) {
+ for (unsigned i = 1; i < index.offsets.size(); ++i) {
// We allow consecutive identical offsets here for zero-length strings.
// See http://crbug.com/69341 for more details.
- if (index->offsets[i] < index->offsets[i - 1]) {
+ if (index.offsets[i] < index.offsets[i - 1]) {
return OTS_FAILURE();
}
}
- index->offset_to_next = index->offsets.back();
+ index.offset_to_next = index.offsets.back();
return true;
}
bool ParseNameData(
ots::Buffer *table, const ots::CFFIndex &index, std::string* out_name) {
uint8_t name[256] = {0};
- if (index.offsets.size() == 0) { // just in case.
+
+ const size_t length = index.offsets[1] - index.offsets[0];
+ // font names should be no longer than 127 characters.
+ if (length > 127) {
return OTS_FAILURE();
}
- for (unsigned i = 1; i < index.offsets.size(); ++i) {
- const size_t length = index.offsets[i] - index.offsets[i - 1];
- // font names should be no longer than 127 characters.
- if (length > 127) {
- return OTS_FAILURE();
- }
- table->set_offset(index.offsets[i - 1]);
- if (!table->Read(name, length)) {
+ table->set_offset(index.offsets[0]);
+ if (!table->Read(name, length)) {
+ return OTS_FAILURE();
+ }
+
+ for (size_t i = 0; i < length; ++i) {
+ // setting the first byte to NUL is allowed.
+ if (i == 0 && name[i] == 0) continue;
+ // non-ASCII characters are not recommended (except the first character).
+ if (name[i] < 33 || name[i] > 126) {
return OTS_FAILURE();
}
-
- for (size_t j = 0; j < length; ++j) {
- // setting the first byte to NUL is allowed.
- if (j == 0 && name[j] == 0) continue;
- // non-ASCII characters are not recommended (except the first character).
- if (name[j] < 33 || name[j] > 126) {
- return OTS_FAILURE();
- }
- // [, ], ... are not allowed.
- if (std::strchr("[](){}<>/% ", name[j])) {
- return OTS_FAILURE();
- }
+ // [, ], ... are not allowed.
+ if (std::strchr("[](){}<>/% ", name[i])) {
+ return OTS_FAILURE();
}
}
@@ -160,8 +168,7 @@ bool ParseNameData(
return true;
}
-bool CheckOffset(const std::pair<uint32_t, DICT_OPERAND_TYPE>& operand,
- size_t table_length) {
+bool CheckOffset(const Operand& operand, size_t table_length) {
if (operand.second != DICT_OPERAND_INTEGER) {
return OTS_FAILURE();
}
@@ -171,8 +178,7 @@ bool CheckOffset(const std::pair<uint32_t, DICT_OPERAND_TYPE>& operand,
return true;
}
-bool CheckSid(const std::pair<uint32_t, DICT_OPERAND_TYPE>& operand,
- size_t sid_max) {
+bool CheckSid(const Operand& operand, size_t sid_max) {
if (operand.second != DICT_OPERAND_INTEGER) {
return OTS_FAILURE();
}
@@ -182,30 +188,28 @@ bool CheckSid(const std::pair<uint32_t, DICT_OPERAND_TYPE>& operand,
return true;
}
-bool ParseDictDataBcd(
- ots::Buffer *table,
- std::vector<std::pair<uint32_t, DICT_OPERAND_TYPE> > *operands) {
+bool ParseDictDataBcd(ots::Buffer &table, std::vector<Operand> &operands) {
bool read_decimal_point = false;
bool read_e = false;
uint8_t nibble = 0;
size_t count = 0;
while (true) {
- if (!table->ReadU8(&nibble)) {
+ if (!table.ReadU8(&nibble)) {
return OTS_FAILURE();
}
if ((nibble & 0xf0) == 0xf0) {
if ((nibble & 0xf) == 0xf) {
// TODO(yusukes): would be better to store actual double value,
// rather than the dummy integer.
- operands->push_back(std::make_pair(static_cast<uint32_t>(0),
+ operands.push_back(std::make_pair(static_cast<uint32_t>(0),
DICT_OPERAND_REAL));
return true;
}
return OTS_FAILURE();
}
if ((nibble & 0x0f) == 0x0f) {
- operands->push_back(std::make_pair(static_cast<uint32_t>(0),
+ operands.push_back(std::make_pair(static_cast<uint32_t>(0),
DICT_OPERAND_REAL));
return true;
}
@@ -242,18 +246,17 @@ bool ParseDictDataBcd(
}
}
-bool ParseDictDataEscapedOperator(
- ots::Buffer *table,
- std::vector<std::pair<uint32_t, DICT_OPERAND_TYPE> > *operands) {
+bool ParseDictDataEscapedOperator(ots::Buffer &table,
+ std::vector<Operand> &operands) {
uint8_t op = 0;
- if (!table->ReadU8(&op)) {
+ if (!table.ReadU8(&op)) {
return OTS_FAILURE();
}
if ((op <= 14) ||
(op >= 17 && op <= 23) ||
(op >= 30 && op <= 38)) {
- operands->push_back(std::make_pair((12U << 8) + op, DICT_OPERATOR));
+ operands.push_back(std::make_pair((12U << 8) + op, DICT_OPERATOR));
return true;
}
@@ -261,9 +264,8 @@ bool ParseDictDataEscapedOperator(
return OTS_FAILURE();
}
-bool ParseDictDataNumber(
- ots::Buffer *table, uint8_t b0,
- std::vector<std::pair<uint32_t, DICT_OPERAND_TYPE> > *operands) {
+bool ParseDictDataNumber(ots::Buffer &table, uint8_t b0,
+ std::vector<Operand> &operands) {
uint8_t b1 = 0;
uint8_t b2 = 0;
uint8_t b3 = 0;
@@ -271,22 +273,22 @@ bool ParseDictDataNumber(
switch (b0) {
case 28: // shortint
- if (!table->ReadU8(&b1) ||
- !table->ReadU8(&b2)) {
+ if (!table.ReadU8(&b1) ||
+ !table.ReadU8(&b2)) {
return OTS_FAILURE();
}
- operands->push_back(std::make_pair(
+ operands.push_back(std::make_pair(
static_cast<uint32_t>((b1 << 8) + b2), DICT_OPERAND_INTEGER));
return true;
case 29: // longint
- if (!table->ReadU8(&b1) ||
- !table->ReadU8(&b2) ||
- !table->ReadU8(&b3) ||
- !table->ReadU8(&b4)) {
+ if (!table.ReadU8(&b1) ||
+ !table.ReadU8(&b2) ||
+ !table.ReadU8(&b3) ||
+ !table.ReadU8(&b4)) {
return OTS_FAILURE();
}
- operands->push_back(std::make_pair(
+ operands.push_back(std::make_pair(
static_cast<uint32_t>((b1 << 24) + (b2 << 16) + (b3 << 8) + b4),
DICT_OPERAND_INTEGER));
return true;
@@ -302,12 +304,12 @@ bool ParseDictDataNumber(
if (b0 >=32 && b0 <=246) {
result = b0 - 139;
} else if (b0 >=247 && b0 <= 250) {
- if (!table->ReadU8(&b1)) {
+ if (!table.ReadU8(&b1)) {
return OTS_FAILURE();
}
result = (b0 - 247) * 256 + b1 + 108;
} else if (b0 >= 251 && b0 <= 254) {
- if (!table->ReadU8(&b1)) {
+ if (!table.ReadU8(&b1)) {
return OTS_FAILURE();
}
result = -(b0 - 251) * 256 + b1 - 108;
@@ -315,22 +317,21 @@ bool ParseDictDataNumber(
return OTS_FAILURE();
}
- operands->push_back(std::make_pair(result, DICT_OPERAND_INTEGER));
+ operands.push_back(std::make_pair(result, DICT_OPERAND_INTEGER));
return true;
}
-bool ParseDictDataReadNext(
- ots::Buffer *table,
- std::vector<std::pair<uint32_t, DICT_OPERAND_TYPE> > *operands) {
+bool ParseDictDataReadNext(ots::Buffer &table,
+ std::vector<Operand> &operands) {
uint8_t op = 0;
- if (!table->ReadU8(&op)) {
+ if (!table.ReadU8(&op)) {
return OTS_FAILURE();
}
- if (op <= 21) {
+ if (op <= 24) {
if (op == 12) {
return ParseDictDataEscapedOperator(table, operands);
}
- operands->push_back(std::make_pair(
+ operands.push_back(std::make_pair(
static_cast<uint32_t>(op), DICT_OPERATOR));
return true;
} else if (op <= 27 || op == 31 || op == 255) {
@@ -341,12 +342,69 @@ bool ParseDictDataReadNext(
return ParseDictDataNumber(table, op, operands);
}
+bool OperandsOverflow(std::vector<Operand>& operands, bool cff2) {
+ // An operator may be preceded by up to a maximum of 48 operands in CFF1 and
+ // 513 operands in CFF2.
+ if ((cff2 && operands.size() > ots::kMaxCFF2ArgumentStack) ||
+ (!cff2 && operands.size() > ots::kMaxCFF1ArgumentStack)) {
+ return true;
+ }
+ return false;
+}
+
+bool ParseDictDataReadOperands(ots::Buffer& dict,
+ std::vector<Operand>& operands,
+ bool cff2) {
+ if (!ParseDictDataReadNext(dict, operands)) {
+ return OTS_FAILURE();
+ }
+ if (operands.empty()) {
+ return OTS_FAILURE();
+ }
+ if (OperandsOverflow(operands, cff2)) {
+ return OTS_FAILURE();
+ }
+ return true;
+}
+
+bool ValidCFF2DictOp(uint32_t op, DICT_DATA_TYPE type) {
+ if (type == DICT_DATA_TOPLEVEL) {
+ switch (op) {
+ case (12U << 8) + 7: // FontMatrix
+ case 17: // CharStrings
+ case (12U << 8) + 36: // FDArray
+ case (12U << 8) + 37: // FDSelect
+ case 24: // vstore
+ return true;
+ default:
+ return false;
+ }
+ } else if (type == DICT_DATA_FDARRAY) {
+ if (op == 18) // Private DICT
+ return true;
+ } else if (type == DICT_DATA_PRIVATE) {
+ switch (op) {
+ case (12U << 8) + 14: // ForceBold
+ case (12U << 8) + 19: // initialRandomSeed
+ case 20: // defaultWidthX
+ case 21: // nominalWidthX
+ return false;
+ default:
+ return true;
+ }
+ }
+
+ return false;
+}
+
bool ParsePrivateDictData(
- const uint8_t *data,
- size_t table_length, size_t offset, size_t dict_length,
+ ots::Buffer &table, size_t offset, size_t dict_length,
DICT_DATA_TYPE type, ots::OpenTypeCFF *out_cff) {
- ots::Buffer table(data + offset, dict_length);
- std::vector<std::pair<uint32_t, DICT_OPERAND_TYPE> > operands;
+ ots::Buffer dict(table.buffer() + offset, dict_length);
+ std::vector<Operand> operands;
+ bool cff2 = (out_cff->major == 2);
+ bool blend_seen = false;
+ uint32_t vsindex = 0;
// Since a Private DICT for FDArray might not have a Local Subr (e.g. Hiragino
// Kaku Gothic Std W8), we create an empty Local Subr here to match the size
@@ -355,15 +413,8 @@ bool ParsePrivateDictData(
out_cff->local_subrs_per_font.push_back(new ots::CFFIndex);
}
- while (table.offset() < dict_length) {
- if (!ParseDictDataReadNext(&table, &operands)) {
- return OTS_FAILURE();
- }
- if (operands.empty()) {
- return OTS_FAILURE();
- }
- if (operands.size() > 48) {
- // An operator may be preceded by up to a maximum of 48 operands.
+ while (dict.offset() < dict.length()) {
+ if (!ParseDictDataReadOperands(dict, operands, cff2)) {
return OTS_FAILURE();
}
if (operands.back().second != DICT_OPERATOR) {
@@ -374,13 +425,18 @@ bool ParsePrivateDictData(
const uint32_t op = operands.back().first;
operands.pop_back();
+ if (cff2 && !ValidCFF2DictOp(op, DICT_DATA_PRIVATE)) {
+ return OTS_FAILURE();
+ }
+
+ bool clear_operands = true;
switch (op) {
// hints
case 6: // BlueValues
case 7: // OtherBlues
case 8: // FamilyBlues
case 9: // FamilyOtherBlues
- if (operands.empty() || (operands.size() % 2) != 0) {
+ if ((operands.size() % 2) != 0) {
return OTS_FAILURE();
}
break;
@@ -420,12 +476,11 @@ bool ParsePrivateDictData(
if (operands.back().first >= 1024 * 1024 * 1024) {
return OTS_FAILURE();
}
- if (operands.back().first + offset >= table_length) {
+ if (operands.back().first + offset >= table.length()) {
return OTS_FAILURE();
}
// parse "16. Local Subrs INDEX"
- ots::Buffer cff_table(data, table_length);
- cff_table.set_offset(operands.back().first + offset);
+ table.set_offset(operands.back().first + offset);
ots::CFFIndex *local_subrs_index = NULL;
if (type == DICT_DATA_FDARRAY) {
if (out_cff->local_subrs_per_font.empty()) {
@@ -439,7 +494,7 @@ bool ParsePrivateDictData(
local_subrs_index = new ots::CFFIndex;
out_cff->local_subrs = local_subrs_index;
}
- if (!ParseIndex(&cff_table, local_subrs_index)) {
+ if (!ParseIndex(table, *local_subrs_index, cff2)) {
return OTS_FAILURE();
}
break;
@@ -458,42 +513,125 @@ bool ParsePrivateDictData(
}
break;
+ case 22: { // vsindex
+ if (!cff2) {
+ return OTS_FAILURE();
+ }
+ if (operands.size() != 1) {
+ return OTS_FAILURE();
+ }
+ if (operands.back().second != DICT_OPERAND_INTEGER) {
+ return OTS_FAILURE();
+ }
+ if (blend_seen) {
+ return OTS_FAILURE();
+ }
+ vsindex = operands.back().first;
+ if (vsindex >= out_cff->region_index_count.size()) {
+ return OTS_FAILURE();
+ }
+ break;
+ }
+
+ case 23: { // blend
+ if (!cff2) {
+ return OTS_FAILURE();
+ }
+ if (operands.size() < 1) {
+ return OTS_FAILURE();
+ }
+ if (vsindex >= out_cff->region_index_count.size()) {
+ return OTS_FAILURE();
+ }
+ uint16_t k = out_cff->region_index_count.at(vsindex);
+ uint16_t n = operands.back().first;
+ if (operands.size() < n * (k + 1) + 1) {
+ return OTS_FAILURE();
+ }
+ size_t operands_size = operands.size();
+ // Keep the 1st n operands on the stack for the next operator to use
+ // and pop the rest. There can be multiple consecutive blend operator,
+ // so this makes sure the operands of all of them are kept on the
+ // stack.
+ while (operands.size() > operands_size - ((n * k) + 1))
+ operands.pop_back();
+ clear_operands = false;
+ blend_seen = true;
+ break;
+ }
+
default:
return OTS_FAILURE();
}
- operands.clear();
+ if (clear_operands) {
+ operands.clear();
+ }
}
return true;
}
-bool ParseDictData(const uint8_t *data, size_t table_length,
- const ots::CFFIndex &index, uint16_t glyphs,
- size_t sid_max, DICT_DATA_TYPE type,
+bool ParseVariationStore(ots::OpenTypeCFF& out_cff, ots::Buffer& table) {
+ uint16_t length;
+
+ if (!table.ReadU16(&length)) {
+ return OTS_FAILURE();
+ }
+
+ // Empty VariationStore is allowed.
+ if (!length) {
+ return true;
+ }
+
+ if (length > table.remaining()) {
+ return OTS_FAILURE();
+ }
+
+ if (!ParseItemVariationStore(out_cff.GetFont(),
+ table.buffer() + table.offset(), length,
+ &(out_cff.region_index_count))) {
+ return OTS_FAILURE();
+ }
+
+ return true;
+}
+
+bool ParseDictData(ots::Buffer& table, ots::Buffer& dict,
+ uint16_t glyphs, size_t sid_max, DICT_DATA_TYPE type,
+ ots::OpenTypeCFF *out_cff);
+
+bool ParseDictData(ots::Buffer& table, const ots::CFFIndex &index,
+ uint16_t glyphs, size_t sid_max, DICT_DATA_TYPE type,
ots::OpenTypeCFF *out_cff) {
for (unsigned i = 1; i < index.offsets.size(); ++i) {
- if (type == DICT_DATA_TOPLEVEL) {
- out_cff->char_strings_array.push_back(new ots::CFFIndex);
- }
size_t dict_length = index.offsets[i] - index.offsets[i - 1];
- ots::Buffer table(data + index.offsets[i - 1], dict_length);
-
- std::vector<std::pair<uint32_t, DICT_OPERAND_TYPE> > operands;
+ ots::Buffer dict(table.buffer() + index.offsets[i - 1], dict_length);
- FONT_FORMAT font_format = FORMAT_UNKNOWN;
- bool have_ros = false;
- uint16_t charstring_glyphs = 0;
- size_t charset_offset = 0;
+ if (!ParseDictData(table, dict, glyphs, sid_max, type, out_cff)) {
+ return OTS_FAILURE();
+ }
+ }
+ return true;
+}
- while (table.offset() < dict_length) {
- if (!ParseDictDataReadNext(&table, &operands)) {
- return OTS_FAILURE();
- }
- if (operands.empty()) {
- return OTS_FAILURE();
- }
- if (operands.size() > 48) {
- // An operator may be preceded by up to a maximum of 48 operands.
+bool ParseDictData(ots::Buffer& table, ots::Buffer& dict,
+ uint16_t glyphs, size_t sid_max, DICT_DATA_TYPE type,
+ ots::OpenTypeCFF *out_cff) {
+ bool cff2 = (out_cff->major == 2);
+ std::vector<Operand> operands;
+
+ FONT_FORMAT font_format = FORMAT_UNKNOWN;
+ bool have_ros = false;
+ bool have_charstrings = false;
+ bool have_vstore = false;
+ size_t charset_offset = 0;
+
+ if (cff2) {
+ // Parse VariationStore first, since it might be referenced in other places
+ // (e.g. FDArray) that might be parsed after it.
+ size_t dict_offset = dict.offset();
+ while (dict.offset() < dict.length()) {
+ if (!ParseDictDataReadOperands(dict, operands, cff2)) {
return OTS_FAILURE();
}
if (operands.back().second != DICT_OPERATOR) continue;
@@ -502,399 +640,503 @@ bool ParseDictData(const uint8_t *data, size_t table_length,
const uint32_t op = operands.back().first;
operands.pop_back();
- switch (op) {
- // SID
- case 0: // version
- case 1: // Notice
- case 2: // Copyright
- case 3: // FullName
- case 4: // FamilyName
- case (12U << 8) + 0: // Copyright
- case (12U << 8) + 21: // PostScript
- case (12U << 8) + 22: // BaseFontName
- case (12U << 8) + 38: // FontName
- if (operands.size() != 1) {
- return OTS_FAILURE();
- }
- if (!CheckSid(operands.back(), sid_max)) {
- return OTS_FAILURE();
- }
- break;
+ if (op == 24) { // vstore
+ if (type != DICT_DATA_TOPLEVEL) {
+ return OTS_FAILURE();
+ }
+ if (operands.size() != 1) {
+ return OTS_FAILURE();
+ }
+ if (!CheckOffset(operands.back(), table.length())) {
+ return OTS_FAILURE();
+ }
+ // parse "VariationStore Data Contents"
+ table.set_offset(operands.back().first);
+ if (!ParseVariationStore(*out_cff, table)) {
+ return OTS_FAILURE();
+ }
+ break;
+ }
+ operands.clear();
+ }
+ operands.clear();
+ dict.set_offset(dict_offset);
+ }
- // array
- case 5: // FontBBox
- case 14: // XUID
- case (12U << 8) + 7: // FontMatrix
- case (12U << 8) + 23: // BaseFontBlend (delta)
- if (operands.empty()) {
- return OTS_FAILURE();
- }
- break;
+ while (dict.offset() < dict.length()) {
+ if (!ParseDictDataReadOperands(dict, operands, cff2)) {
+ return OTS_FAILURE();
+ }
+ if (operands.back().second != DICT_OPERATOR) continue;
- // number
- case 13: // UniqueID
- case (12U << 8) + 2: // ItalicAngle
- case (12U << 8) + 3: // UnderlinePosition
- case (12U << 8) + 4: // UnderlineThickness
- case (12U << 8) + 5: // PaintType
- case (12U << 8) + 8: // StrokeWidth
- case (12U << 8) + 20: // SyntheticBase
- if (operands.size() != 1) {
- return OTS_FAILURE();
- }
- break;
- case (12U << 8) + 31: // CIDFontVersion
- case (12U << 8) + 32: // CIDFontRevision
- case (12U << 8) + 33: // CIDFontType
- case (12U << 8) + 34: // CIDCount
- case (12U << 8) + 35: // UIDBase
- if (operands.size() != 1) {
- return OTS_FAILURE();
- }
- if (font_format != FORMAT_CID_KEYED) {
- return OTS_FAILURE();
- }
- break;
- case (12U << 8) + 6: // CharstringType
- if (operands.size() != 1) {
- return OTS_FAILURE();
- }
- if(operands.back().second != DICT_OPERAND_INTEGER) {
- return OTS_FAILURE();
- }
- if (operands.back().first != 2) {
- // We only support the "Type 2 Charstring Format."
- // TODO(yusukes): Support Type 1 format? Is that still in use?
- return OTS_FAILURE();
- }
- break;
+ // got operator
+ const uint32_t op = operands.back().first;
+ operands.pop_back();
- // boolean
- case (12U << 8) + 1: // isFixedPitch
- if (operands.size() != 1) {
- return OTS_FAILURE();
- }
- if (operands.back().second != DICT_OPERAND_INTEGER) {
- return OTS_FAILURE();
- }
- if (operands.back().first >= 2) {
- return OTS_FAILURE();
- }
- break;
+ if (cff2 && !ValidCFF2DictOp(op, type)) {
+ return OTS_FAILURE();
+ }
- // offset(0)
- case 15: // charset
- if (operands.size() != 1) {
- return OTS_FAILURE();
- }
- if (operands.back().first <= 2) {
- // predefined charset, ISOAdobe, Expert or ExpertSubset, is used.
- break;
- }
- if (!CheckOffset(operands.back(), table_length)) {
- return OTS_FAILURE();
- }
- if (charset_offset) {
- return OTS_FAILURE(); // multiple charset tables?
- }
- charset_offset = operands.back().first;
- break;
+ switch (op) {
+ // SID
+ case 0: // version
+ case 1: // Notice
+ case 2: // Copyright
+ case 3: // FullName
+ case 4: // FamilyName
+ case (12U << 8) + 0: // Copyright
+ case (12U << 8) + 21: // PostScript
+ case (12U << 8) + 22: // BaseFontName
+ case (12U << 8) + 38: // FontName
+ if (operands.size() != 1) {
+ return OTS_FAILURE();
+ }
+ if (!CheckSid(operands.back(), sid_max)) {
+ return OTS_FAILURE();
+ }
+ break;
- case 16: { // Encoding
- if (operands.size() != 1) {
- return OTS_FAILURE();
- }
- if (operands.back().first <= 1) {
- break; // predefined encoding, "Standard" or "Expert", is used.
- }
- if (!CheckOffset(operands.back(), table_length)) {
- return OTS_FAILURE();
- }
+ // array
+ case 5: // FontBBox
+ case 14: // XUID
+ case (12U << 8) + 7: // FontMatrix
+ case (12U << 8) + 23: // BaseFontBlend (delta)
+ if (operands.empty()) {
+ return OTS_FAILURE();
+ }
+ break;
- // parse sub dictionary INDEX.
- ots::Buffer cff_table(data, table_length);
- cff_table.set_offset(operands.back().first);
- uint8_t format = 0;
- if (!cff_table.ReadU8(&format)) {
- return OTS_FAILURE();
- }
- if (format & 0x80) {
- // supplemental encoding is not supported at the moment.
- return OTS_FAILURE();
- }
- // TODO(yusukes): support & parse supplemental encoding tables.
- break;
+ // number
+ case 13: // UniqueID
+ case (12U << 8) + 2: // ItalicAngle
+ case (12U << 8) + 3: // UnderlinePosition
+ case (12U << 8) + 4: // UnderlineThickness
+ case (12U << 8) + 5: // PaintType
+ case (12U << 8) + 8: // StrokeWidth
+ case (12U << 8) + 20: // SyntheticBase
+ if (operands.size() != 1) {
+ return OTS_FAILURE();
+ }
+ break;
+ case (12U << 8) + 31: // CIDFontVersion
+ case (12U << 8) + 32: // CIDFontRevision
+ case (12U << 8) + 33: // CIDFontType
+ case (12U << 8) + 34: // CIDCount
+ case (12U << 8) + 35: // UIDBase
+ if (operands.size() != 1) {
+ return OTS_FAILURE();
+ }
+ if (font_format != FORMAT_CID_KEYED) {
+ return OTS_FAILURE();
+ }
+ break;
+ case (12U << 8) + 6: // CharstringType
+ if (operands.size() != 1) {
+ return OTS_FAILURE();
+ }
+ if(operands.back().second != DICT_OPERAND_INTEGER) {
+ return OTS_FAILURE();
+ }
+ if (operands.back().first != 2) {
+ // We only support the "Type 2 Charstring Format."
+ // TODO(yusukes): Support Type 1 format? Is that still in use?
+ return OTS_FAILURE();
}
+ break;
- case 17: { // CharStrings
- if (type != DICT_DATA_TOPLEVEL) {
- return OTS_FAILURE();
- }
- if (operands.size() != 1) {
- return OTS_FAILURE();
- }
- if (!CheckOffset(operands.back(), table_length)) {
- return OTS_FAILURE();
- }
- // parse "14. CharStrings INDEX"
- ots::Buffer cff_table(data, table_length);
- cff_table.set_offset(operands.back().first);
- ots::CFFIndex *charstring_index = out_cff->char_strings_array.back();
- if (!ParseIndex(&cff_table, charstring_index)) {
- return OTS_FAILURE();
- }
- if (charstring_index->count < 2) {
- return OTS_FAILURE();
- }
- if (charstring_glyphs) {
- return OTS_FAILURE(); // multiple charstring tables?
- }
- charstring_glyphs = charstring_index->count;
- if (charstring_glyphs != glyphs) {
- return OTS_FAILURE(); // CFF and maxp have different number of glyphs?
- }
+ // boolean
+ case (12U << 8) + 1: // isFixedPitch
+ if (operands.size() != 1) {
+ return OTS_FAILURE();
+ }
+ if (operands.back().second != DICT_OPERAND_INTEGER) {
+ return OTS_FAILURE();
+ }
+ if (operands.back().first >= 2) {
+ return OTS_FAILURE();
+ }
+ break;
+
+ // offset(0)
+ case 15: // charset
+ if (operands.size() != 1) {
+ return OTS_FAILURE();
+ }
+ if (operands.back().first <= 2) {
+ // predefined charset, ISOAdobe, Expert or ExpertSubset, is used.
break;
}
+ if (!CheckOffset(operands.back(), table.length())) {
+ return OTS_FAILURE();
+ }
+ if (charset_offset) {
+ return OTS_FAILURE(); // multiple charset tables?
+ }
+ charset_offset = operands.back().first;
+ break;
- case (12U << 8) + 36: { // FDArray
- if (type != DICT_DATA_TOPLEVEL) {
- return OTS_FAILURE();
- }
- if (operands.size() != 1) {
- return OTS_FAILURE();
- }
- if (!CheckOffset(operands.back(), table_length)) {
- return OTS_FAILURE();
- }
+ case 16: { // Encoding
+ if (operands.size() != 1) {
+ return OTS_FAILURE();
+ }
+ if (operands.back().first <= 1) {
+ break; // predefined encoding, "Standard" or "Expert", is used.
+ }
+ if (!CheckOffset(operands.back(), table.length())) {
+ return OTS_FAILURE();
+ }
- // parse sub dictionary INDEX.
- ots::Buffer cff_table(data, table_length);
- cff_table.set_offset(operands.back().first);
- ots::CFFIndex sub_dict_index;
- if (!ParseIndex(&cff_table, &sub_dict_index)) {
- return OTS_FAILURE();
- }
- if (!ParseDictData(data, table_length,
- sub_dict_index,
- glyphs, sid_max, DICT_DATA_FDARRAY,
- out_cff)) {
- return OTS_FAILURE();
- }
- if (out_cff->font_dict_length != 0) {
- return OTS_FAILURE(); // two or more FDArray found.
- }
- out_cff->font_dict_length = sub_dict_index.count;
- break;
+ table.set_offset(operands.back().first);
+ uint8_t format = 0;
+ if (!table.ReadU8(&format)) {
+ return OTS_FAILURE();
}
+ if (format & 0x80) {
+ // supplemental encoding is not supported at the moment.
+ return OTS_FAILURE();
+ }
+ // TODO(yusukes): support & parse supplemental encoding tables.
+ break;
+ }
- case (12U << 8) + 37: { // FDSelect
- if (type != DICT_DATA_TOPLEVEL) {
- return OTS_FAILURE();
+ case 17: { // CharStrings
+ if (type != DICT_DATA_TOPLEVEL) {
+ return OTS_FAILURE();
+ }
+ if (operands.size() != 1) {
+ return OTS_FAILURE();
+ }
+ if (!CheckOffset(operands.back(), table.length())) {
+ return OTS_FAILURE();
+ }
+ // parse "14. CharStrings INDEX"
+ table.set_offset(operands.back().first);
+ ots::CFFIndex *charstring_index = out_cff->charstrings_index;
+ if (!ParseIndex(table, *charstring_index, cff2)) {
+ return OTS_FAILURE();
+ }
+ if (charstring_index->count < 2) {
+ return OTS_FAILURE();
+ }
+ if (have_charstrings) {
+ return OTS_FAILURE(); // multiple charstring tables?
+ }
+ have_charstrings = true;
+ if (charstring_index->count != glyphs) {
+ return OTS_FAILURE(); // CFF and maxp have different number of glyphs?
+ }
+ break;
+ }
+
+ case 24: { // vstore
+ if (!cff2) {
+ return OTS_FAILURE();
+ }
+ if (have_vstore) {
+ return OTS_FAILURE(); // multiple vstore tables?
+ }
+ have_vstore = true;
+ // parsed above.
+ break;
+ }
+
+ case (12U << 8) + 36: { // FDArray
+ if (type != DICT_DATA_TOPLEVEL) {
+ return OTS_FAILURE();
+ }
+ if (operands.size() != 1) {
+ return OTS_FAILURE();
+ }
+ if (!CheckOffset(operands.back(), table.length())) {
+ return OTS_FAILURE();
+ }
+
+ // parse Font DICT INDEX.
+ table.set_offset(operands.back().first);
+ ots::CFFIndex sub_dict_index;
+ if (!ParseIndex(table, sub_dict_index, cff2)) {
+ return OTS_FAILURE();
+ }
+ if (!ParseDictData(table, sub_dict_index,
+ glyphs, sid_max, DICT_DATA_FDARRAY,
+ out_cff)) {
+ return OTS_FAILURE();
+ }
+ if (out_cff->font_dict_length != 0) {
+ return OTS_FAILURE(); // two or more FDArray found.
+ }
+ out_cff->font_dict_length = sub_dict_index.count;
+ break;
+ }
+
+ case (12U << 8) + 37: { // FDSelect
+ if (type != DICT_DATA_TOPLEVEL) {
+ return OTS_FAILURE();
+ }
+ if (operands.size() != 1) {
+ return OTS_FAILURE();
+ }
+ if (!CheckOffset(operands.back(), table.length())) {
+ return OTS_FAILURE();
+ }
+
+ // parse FDSelect data structure
+ table.set_offset(operands.back().first);
+ uint8_t format = 0;
+ if (!table.ReadU8(&format)) {
+ return OTS_FAILURE();
+ }
+ if (format == 0) {
+ for (uint16_t j = 0; j < glyphs; ++j) {
+ uint8_t fd_index = 0;
+ if (!table.ReadU8(&fd_index)) {
+ return OTS_FAILURE();
+ }
+ (out_cff->fd_select)[j] = fd_index;
}
- if (operands.size() != 1) {
+ } else if (format == 3) {
+ uint16_t n_ranges = 0;
+ if (!table.ReadU16(&n_ranges)) {
return OTS_FAILURE();
}
- if (!CheckOffset(operands.back(), table_length)) {
+ if (n_ranges == 0) {
return OTS_FAILURE();
}
- // parse FDSelect data structure
- ots::Buffer cff_table(data, table_length);
- cff_table.set_offset(operands.back().first);
- uint8_t format = 0;
- if (!cff_table.ReadU8(&format)) {
- return OTS_FAILURE();
- }
- if (format == 0) {
- for (uint16_t j = 0; j < glyphs; ++j) {
- uint8_t fd_index = 0;
- if (!cff_table.ReadU8(&fd_index)) {
- return OTS_FAILURE();
- }
- (out_cff->fd_select)[j] = fd_index;
- }
- } else if (format == 3) {
- uint16_t n_ranges = 0;
- if (!cff_table.ReadU16(&n_ranges)) {
+ uint16_t last_gid = 0;
+ uint8_t fd_index = 0;
+ for (unsigned j = 0; j < n_ranges; ++j) {
+ uint16_t first = 0; // GID
+ if (!table.ReadU16(&first)) {
return OTS_FAILURE();
}
- if (n_ranges == 0) {
+
+ // Sanity checks.
+ if ((j == 0) && (first != 0)) {
return OTS_FAILURE();
}
+ if ((j != 0) && (last_gid >= first)) {
+ return OTS_FAILURE(); // not increasing order.
+ }
+ if (first >= glyphs) {
+ return OTS_FAILURE(); // invalid gid.
+ }
- uint16_t last_gid = 0;
- uint8_t fd_index = 0;
- for (unsigned j = 0; j < n_ranges; ++j) {
- uint16_t first = 0; // GID
- if (!cff_table.ReadU16(&first)) {
- return OTS_FAILURE();
- }
-
- // Sanity checks.
- if ((j == 0) && (first != 0)) {
- return OTS_FAILURE();
- }
- if ((j != 0) && (last_gid >= first)) {
- return OTS_FAILURE(); // not increasing order.
- }
-
- // Copy the mapping to |out_cff->fd_select|.
- if (j != 0) {
- for (uint16_t k = last_gid; k < first; ++k) {
- if (!out_cff->fd_select.insert(
- std::make_pair(k, fd_index)).second) {
- return OTS_FAILURE();
- }
+ // Copy the mapping to |out_cff->fd_select|.
+ if (j != 0) {
+ for (auto k = last_gid; k < first; ++k) {
+ if (!out_cff->fd_select.insert(
+ std::make_pair(k, fd_index)).second) {
+ return OTS_FAILURE();
}
}
-
- if (!cff_table.ReadU8(&fd_index)) {
- return OTS_FAILURE();
- }
- last_gid = first;
- // TODO(yusukes): check GID?
- }
- uint16_t sentinel = 0;
- if (!cff_table.ReadU16(&sentinel)) {
- return OTS_FAILURE();
}
- if (last_gid >= sentinel) {
+
+ if (!table.ReadU8(&fd_index)) {
return OTS_FAILURE();
}
- for (uint16_t k = last_gid; k < sentinel; ++k) {
- if (!out_cff->fd_select.insert(
- std::make_pair(k, fd_index)).second) {
- return OTS_FAILURE();
- }
- }
- } else {
- // unknown format
- return OTS_FAILURE();
- }
- break;
- }
-
- // Private DICT (2 * number)
- case 18: {
- if (operands.size() != 2) {
- return OTS_FAILURE();
+ last_gid = first;
}
- if (operands.back().second != DICT_OPERAND_INTEGER) {
+ uint16_t sentinel = 0;
+ if (!table.ReadU16(&sentinel)) {
return OTS_FAILURE();
}
- const uint32_t private_offset = operands.back().first;
- operands.pop_back();
- if (operands.back().second != DICT_OPERAND_INTEGER) {
+ if (last_gid >= sentinel) {
return OTS_FAILURE();
}
- const uint32_t private_length = operands.back().first;
- if (private_offset > table_length) {
- return OTS_FAILURE();
+ if (sentinel > glyphs) {
+ return OTS_FAILURE(); // invalid gid.
}
- if (private_length >= table_length) {
- return OTS_FAILURE();
+ for (auto k = last_gid; k < sentinel; ++k) {
+ if (!out_cff->fd_select.insert(
+ std::make_pair(k, fd_index)).second) {
+ return OTS_FAILURE();
+ }
}
- if (private_length + private_offset > table_length) {
+ } else if (cff2 && format == 4) {
+ uint32_t n_ranges = 0;
+ if (!table.ReadU32(&n_ranges)) {
return OTS_FAILURE();
}
- // parse "15. Private DICT Data"
- if (!ParsePrivateDictData(data, table_length,
- private_offset, private_length,
- type, out_cff)) {
+ if (n_ranges == 0) {
return OTS_FAILURE();
}
- break;
- }
- // ROS
- case (12U << 8) + 30:
- if (font_format != FORMAT_UNKNOWN) {
- return OTS_FAILURE();
+ uint32_t last_gid = 0;
+ uint16_t fd_index = 0;
+ for (unsigned j = 0; j < n_ranges; ++j) {
+ uint32_t first = 0; // GID
+ if (!table.ReadU32(&first)) {
+ return OTS_FAILURE();
+ }
+
+ // Sanity checks.
+ if ((j == 0) && (first != 0)) {
+ return OTS_FAILURE();
+ }
+ if ((j != 0) && (last_gid >= first)) {
+ return OTS_FAILURE(); // not increasing order.
+ }
+ if (first >= glyphs) {
+ return OTS_FAILURE(); // invalid gid.
+ }
+
+ // Copy the mapping to |out_cff->fd_select|.
+ if (j != 0) {
+ for (auto k = last_gid; k < first; ++k) {
+ if (!out_cff->fd_select.insert(
+ std::make_pair(k, fd_index)).second) {
+ return OTS_FAILURE();
+ }
+ }
+ }
+
+ if (!table.ReadU16(&fd_index)) {
+ return OTS_FAILURE();
+ }
+ last_gid = first;
}
- font_format = FORMAT_CID_KEYED;
- if (operands.size() != 3) {
+ uint32_t sentinel = 0;
+ if (!table.ReadU32(&sentinel)) {
return OTS_FAILURE();
}
- // check SIDs
- operands.pop_back(); // ignore the first number.
- if (!CheckSid(operands.back(), sid_max)) {
+ if (last_gid >= sentinel) {
return OTS_FAILURE();
}
- operands.pop_back();
- if (!CheckSid(operands.back(), sid_max)) {
- return OTS_FAILURE();
+ if (sentinel > glyphs) {
+ return OTS_FAILURE(); // invalid gid.
}
- if (have_ros) {
- return OTS_FAILURE(); // multiple ROS tables?
+ for (auto k = last_gid; k < sentinel; ++k) {
+ if (!out_cff->fd_select.insert(
+ std::make_pair(k, fd_index)).second) {
+ return OTS_FAILURE();
+ }
}
- have_ros = true;
- break;
-
- default:
+ } else {
+ // unknown format
return OTS_FAILURE();
+ }
+ break;
}
- operands.clear();
- if (font_format == FORMAT_UNKNOWN) {
- font_format = FORMAT_OTHER;
+ // Private DICT (2 * number)
+ case 18: {
+ if (operands.size() != 2) {
+ return OTS_FAILURE();
+ }
+ if (operands.back().second != DICT_OPERAND_INTEGER) {
+ return OTS_FAILURE();
+ }
+ const uint32_t private_offset = operands.back().first;
+ operands.pop_back();
+ if (operands.back().second != DICT_OPERAND_INTEGER) {
+ return OTS_FAILURE();
+ }
+ const uint32_t private_length = operands.back().first;
+ if (private_offset > table.length()) {
+ return OTS_FAILURE();
+ }
+ if (private_length >= table.length()) {
+ return OTS_FAILURE();
+ }
+ if (private_length + private_offset > table.length()) {
+ return OTS_FAILURE();
+ }
+ // parse "15. Private DICT data"
+ if (!ParsePrivateDictData(table, private_offset, private_length,
+ type, out_cff)) {
+ return OTS_FAILURE();
+ }
+ break;
}
- }
- // parse "13. Charsets"
- if (charset_offset) {
- ots::Buffer cff_table(data, table_length);
- cff_table.set_offset(charset_offset);
- uint8_t format = 0;
- if (!cff_table.ReadU8(&format)) {
+ // ROS
+ case (12U << 8) + 30:
+ if (font_format != FORMAT_UNKNOWN) {
+ return OTS_FAILURE();
+ }
+ font_format = FORMAT_CID_KEYED;
+ if (operands.size() != 3) {
+ return OTS_FAILURE();
+ }
+ // check SIDs
+ operands.pop_back(); // ignore the first number.
+ if (!CheckSid(operands.back(), sid_max)) {
+ return OTS_FAILURE();
+ }
+ operands.pop_back();
+ if (!CheckSid(operands.back(), sid_max)) {
+ return OTS_FAILURE();
+ }
+ if (have_ros) {
+ return OTS_FAILURE(); // multiple ROS tables?
+ }
+ have_ros = true;
+ break;
+
+ default:
return OTS_FAILURE();
- }
- switch (format) {
- case 0:
- for (uint16_t j = 1 /* .notdef is omitted */; j < glyphs; ++j) {
- uint16_t sid = 0;
- if (!cff_table.ReadU16(&sid)) {
- return OTS_FAILURE();
- }
- if (!have_ros && (sid > sid_max)) {
- return OTS_FAILURE();
- }
- // TODO(yusukes): check CIDs when have_ros is true.
+ }
+ operands.clear();
+
+ if (font_format == FORMAT_UNKNOWN) {
+ font_format = FORMAT_OTHER;
+ }
+ }
+
+ // parse "13. Charsets"
+ if (charset_offset) {
+ table.set_offset(charset_offset);
+ uint8_t format = 0;
+ if (!table.ReadU8(&format)) {
+ return OTS_FAILURE();
+ }
+ switch (format) {
+ case 0:
+ for (uint16_t j = 1 /* .notdef is omitted */; j < glyphs; ++j) {
+ uint16_t sid = 0;
+ if (!table.ReadU16(&sid)) {
+ return OTS_FAILURE();
}
- break;
+ if (!have_ros && (sid > sid_max)) {
+ return OTS_FAILURE();
+ }
+ // TODO(yusukes): check CIDs when have_ros is true.
+ }
+ break;
+
+ case 1:
+ case 2: {
+ uint32_t total = 1; // .notdef is omitted.
+ while (total < glyphs) {
+ uint16_t sid = 0;
+ if (!table.ReadU16(&sid)) {
+ return OTS_FAILURE();
+ }
+ if (!have_ros && (sid > sid_max)) {
+ return OTS_FAILURE();
+ }
+ // TODO(yusukes): check CIDs when have_ros is true.
- case 1:
- case 2: {
- uint32_t total = 1; // .notdef is omitted.
- while (total < glyphs) {
- uint16_t sid = 0;
- if (!cff_table.ReadU16(&sid)) {
+ if (format == 1) {
+ uint8_t left = 0;
+ if (!table.ReadU8(&left)) {
return OTS_FAILURE();
}
- if (!have_ros && (sid > sid_max)) {
+ total += (left + 1);
+ } else {
+ uint16_t left = 0;
+ if (!table.ReadU16(&left)) {
return OTS_FAILURE();
}
- // TODO(yusukes): check CIDs when have_ros is true.
-
- if (format == 1) {
- uint8_t left = 0;
- if (!cff_table.ReadU8(&left)) {
- return OTS_FAILURE();
- }
- total += (left + 1);
- } else {
- uint16_t left = 0;
- if (!cff_table.ReadU16(&left)) {
- return OTS_FAILURE();
- }
- total += (left + 1);
- }
+ total += (left + 1);
}
- break;
}
-
- default:
- return OTS_FAILURE();
+ break;
}
+
+ default:
+ return OTS_FAILURE();
}
}
return true;
@@ -904,147 +1146,218 @@ bool ParseDictData(const uint8_t *data, size_t table_length,
namespace ots {
-bool ots_cff_parse(Font *font, const uint8_t *data, size_t length) {
+bool OpenTypeCFF::ValidateFDSelect(uint16_t num_glyphs) {
+ for (const auto& fd_select : this->fd_select) {
+ if (fd_select.first >= num_glyphs) {
+ return Error("Invalid glyph index in FDSelect: %d >= %d\n",
+ fd_select.first, num_glyphs);
+ }
+ if (fd_select.second >= this->font_dict_length) {
+ return Error("Invalid FD index: %d >= %d\n",
+ fd_select.second, this->font_dict_length);
+ }
+ }
+ return true;
+}
+
+bool OpenTypeCFF::Parse(const uint8_t *data, size_t length) {
Buffer table(data, length);
- font->cff = new OpenTypeCFF;
- font->cff->data = data;
- font->cff->length = length;
- font->cff->font_dict_length = 0;
- font->cff->local_subrs = NULL;
+ Font *font = GetFont();
+
+ this->m_data = data;
+ this->m_length = length;
// parse "6. Header" in the Adobe Compact Font Format Specification
uint8_t major = 0;
uint8_t minor = 0;
uint8_t hdr_size = 0;
uint8_t off_size = 0;
- if (!table.ReadU8(&major)) {
- return OTS_FAILURE();
+ if (!table.ReadU8(&major) ||
+ !table.ReadU8(&minor) ||
+ !table.ReadU8(&hdr_size) ||
+ !table.ReadU8(&off_size)) {
+ return Error("Failed to read table header");
}
- if (!table.ReadU8(&minor)) {
- return OTS_FAILURE();
- }
- if (!table.ReadU8(&hdr_size)) {
- return OTS_FAILURE();
- }
- if (!table.ReadU8(&off_size)) {
- return OTS_FAILURE();
- }
- if ((off_size == 0) || (off_size > 4)) {
- return OTS_FAILURE();
+
+ if (off_size < 1 || off_size > 4) {
+ return Error("Bad offSize: %d", off_size);
}
- if ((major != 1) ||
- (minor != 0) ||
- (hdr_size != 4)) {
- return OTS_FAILURE();
+ if (major != 1 || minor != 0) {
+ return Error("Unsupported table version: %d.%d", major, minor);
}
- if (hdr_size >= length) {
- return OTS_FAILURE();
+
+ this->major = major;
+
+ if (hdr_size != 4 || hdr_size >= length) {
+ return Error("Bad hdrSize: %d", hdr_size);
}
// parse "7. Name INDEX"
table.set_offset(hdr_size);
CFFIndex name_index;
- if (!ParseIndex(&table, &name_index)) {
- return OTS_FAILURE();
+ if (!ParseIndex(table, name_index)) {
+ return Error("Failed to parse Name INDEX");
}
- if (!ParseNameData(&table, name_index, &(font->cff->name))) {
- return OTS_FAILURE();
+ if (name_index.count != 1 || name_index.offsets.size() != 2) {
+ return Error("Name INDEX must contain only one entry, not %d",
+ name_index.count);
+ }
+ if (!ParseNameData(&table, name_index, &(this->name))) {
+ return Error("Failed to parse Name INDEX data");
}
// parse "8. Top DICT INDEX"
table.set_offset(name_index.offset_to_next);
CFFIndex top_dict_index;
- if (!ParseIndex(&table, &top_dict_index)) {
- return OTS_FAILURE();
+ if (!ParseIndex(table, top_dict_index)) {
+ return Error("Failed to parse Top DICT INDEX");
}
- if (name_index.count != top_dict_index.count) {
- return OTS_FAILURE();
+ if (top_dict_index.count != 1) {
+ return Error("Top DICT INDEX must contain only one entry, not %d",
+ top_dict_index.count);
}
// parse "10. String INDEX"
table.set_offset(top_dict_index.offset_to_next);
CFFIndex string_index;
- if (!ParseIndex(&table, &string_index)) {
- return OTS_FAILURE();
+ if (!ParseIndex(table, string_index)) {
+ return Error("Failed to parse String INDEX");
}
if (string_index.count >= 65000 - kNStdString) {
- return OTS_FAILURE();
+ return Error("Too many entries in String INDEX: %d", string_index.count);
}
- const uint16_t num_glyphs = font->maxp->num_glyphs;
+ OpenTypeMAXP *maxp = static_cast<OpenTypeMAXP*>(
+ font->GetTypedTable(OTS_TAG_MAXP));
+ if (!maxp) {
+ return Error("Required maxp table missing");
+ }
+ const uint16_t num_glyphs = maxp->num_glyphs;
const size_t sid_max = string_index.count + kNStdString;
// string_index.count == 0 is allowed.
// parse "9. Top DICT Data"
- if (!ParseDictData(data, length, top_dict_index,
+ this->charstrings_index = new ots::CFFIndex;
+ if (!ParseDictData(table, top_dict_index,
num_glyphs, sid_max,
- DICT_DATA_TOPLEVEL, font->cff)) {
- return OTS_FAILURE();
+ DICT_DATA_TOPLEVEL, this)) {
+ return Error("Failed to parse Top DICT Data");
}
// parse "16. Global Subrs INDEX"
table.set_offset(string_index.offset_to_next);
CFFIndex global_subrs_index;
- if (!ParseIndex(&table, &global_subrs_index)) {
- return OTS_FAILURE();
+ if (!ParseIndex(table, global_subrs_index)) {
+ return Error("Failed to parse Global Subrs INDEX");
}
- // Check if all fd_index in FDSelect are valid.
- std::map<uint16_t, uint8_t>::const_iterator iter;
- std::map<uint16_t, uint8_t>::const_iterator end = font->cff->fd_select.end();
- for (iter = font->cff->fd_select.begin(); iter != end; ++iter) {
- if (iter->second >= font->cff->font_dict_length) {
- return OTS_FAILURE();
- }
+ // Check if all fd and glyph indices in FDSelect are valid.
+ if (!ValidateFDSelect(num_glyphs)) {
+ return Error("Failed to validate FDSelect");
}
// Check if all charstrings (font hinting code for each glyph) are valid.
- for (size_t i = 0; i < font->cff->char_strings_array.size(); ++i) {
- if (!ValidateType2CharStringIndex(font,
- *(font->cff->char_strings_array.at(i)),
- global_subrs_index,
- font->cff->fd_select,
- font->cff->local_subrs_per_font,
- font->cff->local_subrs,
- &table)) {
- return OTS_FAILURE_MSG("Failed validating charstring set %d", (int) i);
- }
+ if (!ValidateCFFCharStrings(*this, global_subrs_index, &table)) {
+ return Error("Failed validating CharStrings INDEX");
}
return true;
}
-bool ots_cff_should_serialise(Font *font) {
- return font->cff != NULL;
+bool OpenTypeCFF::Serialize(OTSStream *out) {
+ if (!out->Write(this->m_data, this->m_length)) {
+ return Error("Failed to write table");
+ }
+ return true;
}
-bool ots_cff_serialise(OTSStream *out, Font *font) {
- // TODO(yusukes): would be better to transcode the data,
- // rather than simple memcpy.
- if (!out->Write(font->cff->data, font->cff->length)) {
- return OTS_FAILURE();
+OpenTypeCFF::~OpenTypeCFF() {
+ for (size_t i = 0; i < this->local_subrs_per_font.size(); ++i) {
+ delete (this->local_subrs_per_font)[i];
}
- return true;
+ delete this->charstrings_index;
+ delete this->local_subrs;
}
-void ots_cff_reuse(Font *font, Font *other) {
- font->cff = other->cff;
- font->cff_reused = true;
+bool OpenTypeCFF2::Parse(const uint8_t *data, size_t length) {
+ Buffer table(data, length);
+
+ Font *font = GetFont();
+
+ this->m_data = data;
+ this->m_length = length;
+
+ // parse "6. Header"
+ uint8_t major = 0;
+ uint8_t minor = 0;
+ uint8_t hdr_size = 0;
+ uint16_t top_dict_size = 0;
+ if (!table.ReadU8(&major) ||
+ !table.ReadU8(&minor) ||
+ !table.ReadU8(&hdr_size) ||
+ !table.ReadU16(&top_dict_size)) {
+ return Error("Failed to read table header");
+ }
+
+ if (major != 2 || minor != 0) {
+ return Error("Unsupported table version: %d.%d", major, minor);
+ }
+
+ this->major = major;
+
+ if (hdr_size >= length) {
+ return Error("Bad hdrSize: %d", hdr_size);
+ }
+
+ if (top_dict_size == 0 || hdr_size + top_dict_size > length) {
+ return Error("Bad topDictLength: %d", top_dict_size);
+ }
+
+ OpenTypeMAXP *maxp = static_cast<OpenTypeMAXP*>(
+ font->GetTypedTable(OTS_TAG_MAXP));
+ if (!maxp) {
+ return Error("Required maxp table missing");
+ }
+ const uint16_t num_glyphs = maxp->num_glyphs;
+ const size_t sid_max = kNStdString;
+
+ // parse "7. Top DICT Data"
+ ots::Buffer top_dict(data + hdr_size, top_dict_size);
+ table.set_offset(hdr_size);
+ this->charstrings_index = new ots::CFFIndex;
+ if (!ParseDictData(table, top_dict,
+ num_glyphs, sid_max,
+ DICT_DATA_TOPLEVEL, this)) {
+ return Error("Failed to parse Top DICT Data");
+ }
+
+ // parse "9. Global Subrs INDEX"
+ table.set_offset(hdr_size + top_dict_size);
+ CFFIndex global_subrs_index;
+ if (!ParseIndex(table, global_subrs_index, true)) {
+ return Error("Failed to parse Global Subrs INDEX");
+ }
+
+ // Check if all fd and glyph indices in FDSelect are valid.
+ if (!ValidateFDSelect(num_glyphs)) {
+ return Error("Failed to validate FDSelect");
+ }
+
+ // Check if all charstrings (font hinting code for each glyph) are valid.
+ if (!ValidateCFFCharStrings(*this, global_subrs_index, &table)) {
+ return Error("Failed validating CharStrings INDEX");
+ }
+
+ return true;
}
-void ots_cff_free(Font *font) {
- if (font->cff) {
- for (size_t i = 0; i < font->cff->char_strings_array.size(); ++i) {
- delete (font->cff->char_strings_array)[i];
- }
- for (size_t i = 0; i < font->cff->local_subrs_per_font.size(); ++i) {
- delete (font->cff->local_subrs_per_font)[i];
- }
- delete font->cff->local_subrs;
- delete font->cff;
+bool OpenTypeCFF2::Serialize(OTSStream *out) {
+ if (!out->Write(this->m_data, this->m_length)) {
+ return Error("Failed to write table");
}
+ return true;
}
} // namespace ots
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-23 15:17:26 +0000