From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- gfx/ots/src/glat.cc | 458 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 458 insertions(+) create mode 100644 gfx/ots/src/glat.cc (limited to 'gfx/ots/src/glat.cc') diff --git a/gfx/ots/src/glat.cc b/gfx/ots/src/glat.cc new file mode 100644 index 0000000000..b42453008d --- /dev/null +++ b/gfx/ots/src/glat.cc @@ -0,0 +1,458 @@ +// 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. + +#include "glat.h" + +#include "gloc.h" +#include "mozilla/Compression.h" +#include +#include + +namespace ots { + +// ----------------------------------------------------------------------------- +// OpenTypeGLAT_v1 +// ----------------------------------------------------------------------------- + +bool OpenTypeGLAT_v1::Parse(const uint8_t* data, size_t length) { + Buffer table(data, length); + OpenTypeGLOC* gloc = static_cast( + GetFont()->GetTypedTable(OTS_TAG_GLOC)); + if (!gloc) { + return DropGraphite("Required Gloc table is missing"); + } + + if (!table.ReadU32(&this->version) || this->version >> 16 != 1) { + return DropGraphite("Failed to read version"); + } + + const std::vector& locations = gloc->GetLocations(); + if (locations.empty()) { + return DropGraphite("No locations from Gloc table"); + } + std::list unverified(locations.begin(), locations.end()); + while (table.remaining()) { + GlatEntry entry(this); + if (table.offset() > unverified.front()) { + return DropGraphite("Offset check failed for a GlatEntry"); + } + if (table.offset() == unverified.front()) { + unverified.pop_front(); + } + if (unverified.empty()) { + return DropGraphite("Expected more locations"); + } + if (!entry.ParsePart(table)) { + return DropGraphite("Failed to read a GlatEntry"); + } + this->entries.push_back(entry); + } + + if (unverified.size() != 1 || unverified.front() != table.offset()) { + return DropGraphite("%zu location(s) could not be verified", unverified.size()); + } + if (table.remaining()) { + return Warning("%zu bytes unparsed", table.remaining()); + } + return true; +} + +bool OpenTypeGLAT_v1::Serialize(OTSStream* out) { + if (!out->WriteU32(this->version) || + !SerializeParts(this->entries, out)) { + return Error("Failed to write table"); + } + return true; +} + +bool OpenTypeGLAT_v1::GlatEntry::ParsePart(Buffer& table) { + if (!table.ReadU8(&this->attNum)) { + return parent->Error("GlatEntry: Failed to read attNum"); + } + if (!table.ReadU8(&this->num)) { + return parent->Error("GlatEntry: Failed to read num"); + } + + //this->attributes.resize(this->num); + for (int i = 0; i < this->num; ++i) { + this->attributes.emplace_back(); + if (!table.ReadS16(&this->attributes[i])) { + return parent->Error("GlatEntry: Failed to read attribute %u", i); + } + } + return true; +} + +bool OpenTypeGLAT_v1::GlatEntry::SerializePart(OTSStream* out) const { + if (!out->WriteU8(this->attNum) || + !out->WriteU8(this->num) || + !SerializeParts(this->attributes, out)) { + return parent->Error("GlatEntry: Failed to write"); + } + return true; +} + +// ----------------------------------------------------------------------------- +// OpenTypeGLAT_v2 +// ----------------------------------------------------------------------------- + +bool OpenTypeGLAT_v2::Parse(const uint8_t* data, size_t length) { + Buffer table(data, length); + OpenTypeGLOC* gloc = static_cast( + GetFont()->GetTypedTable(OTS_TAG_GLOC)); + if (!gloc) { + return DropGraphite("Required Gloc table is missing"); + } + + if (!table.ReadU32(&this->version) || this->version >> 16 != 1) { + return DropGraphite("Failed to read version"); + } + + const std::vector& locations = gloc->GetLocations(); + if (locations.empty()) { + return DropGraphite("No locations from Gloc table"); + } + std::list unverified(locations.begin(), locations.end()); + while (table.remaining()) { + GlatEntry entry(this); + if (table.offset() > unverified.front()) { + return DropGraphite("Offset check failed for a GlatEntry"); + } + if (table.offset() == unverified.front()) { + unverified.pop_front(); + } + if (unverified.empty()) { + return DropGraphite("Expected more locations"); + } + if (!entry.ParsePart(table)) { + return DropGraphite("Failed to read a GlatEntry"); + } + this->entries.push_back(entry); + } + + if (unverified.size() != 1 || unverified.front() != table.offset()) { + return DropGraphite("%zu location(s) could not be verified", unverified.size()); + } + if (table.remaining()) { + return Warning("%zu bytes unparsed", table.remaining()); + } + return true; +} + +bool OpenTypeGLAT_v2::Serialize(OTSStream* out) { + if (!out->WriteU32(this->version) || + !SerializeParts(this->entries, out)) { + return Error("Failed to write table"); + } + return true; +} + +bool OpenTypeGLAT_v2::GlatEntry::ParsePart(Buffer& table) { + if (!table.ReadS16(&this->attNum)) { + return parent->Error("GlatEntry: Failed to read attNum"); + } + if (!table.ReadS16(&this->num) || this->num < 0) { + return parent->Error("GlatEntry: Failed to read valid num"); + } + + //this->attributes.resize(this->num); + for (int i = 0; i < this->num; ++i) { + this->attributes.emplace_back(); + if (!table.ReadS16(&this->attributes[i])) { + return parent->Error("GlatEntry: Failed to read attribute %u", i); + } + } + return true; +} + +bool OpenTypeGLAT_v2::GlatEntry::SerializePart(OTSStream* out) const { + if (!out->WriteS16(this->attNum) || + !out->WriteS16(this->num) || + !SerializeParts(this->attributes, out)) { + return parent->Error("GlatEntry: Failed to write"); + } + return true; +} + +// ----------------------------------------------------------------------------- +// OpenTypeGLAT_v3 +// ----------------------------------------------------------------------------- + +bool OpenTypeGLAT_v3::Parse(const uint8_t* data, size_t length, + bool prevent_decompression) { + Buffer table(data, length); + OpenTypeGLOC* gloc = static_cast( + GetFont()->GetTypedTable(OTS_TAG_GLOC)); + if (!gloc) { + return DropGraphite("Required Gloc table is missing"); + } + + if (!table.ReadU32(&this->version) || this->version >> 16 != 3) { + return DropGraphite("Failed to read version"); + } + if (!table.ReadU32(&this->compHead)) { + return DropGraphite("Failed to read compression header"); + } + switch ((this->compHead & SCHEME) >> 27) { + case 0: // uncompressed + break; + case 1: { // lz4 + if (prevent_decompression) { + return DropGraphite("Illegal nested compression"); + } + size_t decompressed_size = this->compHead & FULL_SIZE; + if (decompressed_size < length) { + return DropGraphite("Decompressed size is less than compressed size"); + } + if (decompressed_size == 0) { + return DropGraphite("Decompressed size is set to 0"); + } + // decompressed table must be <= OTS_MAX_DECOMPRESSED_TABLE_SIZE + if (decompressed_size > OTS_MAX_DECOMPRESSED_TABLE_SIZE) { + return DropGraphite("Decompressed size exceeds %gMB: %gMB", + OTS_MAX_DECOMPRESSED_TABLE_SIZE / (1024.0 * 1024.0), + decompressed_size / (1024.0 * 1024.0)); + } + std::unique_ptr decompressed(new uint8_t[decompressed_size]()); + size_t outputSize = 0; + bool ret = mozilla::Compression::LZ4::decompressPartial( + reinterpret_cast(data + table.offset()), + table.remaining(), // input buffer size (input size + padding) + reinterpret_cast(decompressed.get()), + decompressed_size, // target output size + &outputSize); // return output size + if (!ret || outputSize != decompressed_size) { + return DropGraphite("Decompression failed"); + } + return this->Parse(decompressed.get(), decompressed_size, true); + } + default: + return DropGraphite("Unknown compression scheme"); + } + if (this->compHead & RESERVED) { + Warning("Nonzero reserved"); + } + + const std::vector& locations = gloc->GetLocations(); + if (locations.empty()) { + return DropGraphite("No locations from Gloc table"); + } + std::list unverified(locations.begin(), locations.end()); + //this->entries.resize(locations.size() - 1, this); + for (size_t i = 0; i < locations.size() - 1; ++i) { + this->entries.emplace_back(this); + if (table.offset() != unverified.front()) { + return DropGraphite("Offset check failed for a GlyphAttrs"); + } + unverified.pop_front(); + if (!this->entries[i].ParsePart(table, + unverified.front() - table.offset())) { + // unverified.front() is guaranteed to exist because of the number of + // iterations of this loop + return DropGraphite("Failed to read a GlyphAttrs"); + } + } + + if (unverified.size() != 1 || unverified.front() != table.offset()) { + return DropGraphite("%zu location(s) could not be verified", unverified.size()); + } + if (table.remaining()) { + return Warning("%zu bytes unparsed", table.remaining()); + } + return true; +} + +bool OpenTypeGLAT_v3::Serialize(OTSStream* out) { + if (!out->WriteU32(this->version) || + !out->WriteU32(this->compHead) || + !SerializeParts(this->entries, out)) { + return Error("Failed to write table"); + } + return true; +} + +bool OpenTypeGLAT_v3::GlyphAttrs::ParsePart(Buffer& table, const size_t size) { + size_t init_offset = table.offset(); + if (parent->compHead & OCTABOXES && !octabox.ParsePart(table)) { + // parent->flags & 0b1: octaboxes are present flag + return parent->Error("GlyphAttrs: Failed to read octabox"); + } + + while (table.offset() < init_offset + size) { + GlatEntry entry(parent); + if (!entry.ParsePart(table)) { + return parent->Error("GlyphAttrs: Failed to read a GlatEntry"); + } + this->entries.push_back(entry); + } + return true; +} + +bool OpenTypeGLAT_v3::GlyphAttrs::SerializePart(OTSStream* out) const { + if ((parent->compHead & OCTABOXES && !octabox.SerializePart(out)) || + !SerializeParts(this->entries, out)) { + return parent->Error("GlyphAttrs: Failed to write"); + } + return true; +} + +bool OpenTypeGLAT_v3::GlyphAttrs:: +OctaboxMetrics::ParsePart(Buffer& table) { + if (!table.ReadU16(&this->subbox_bitmap)) { + return parent->Error("OctaboxMetrics: Failed to read subbox_bitmap"); + } + if (!table.ReadU8(&this->diag_neg_min)) { + return parent->Error("OctaboxMetrics: Failed to read diag_neg_min"); + } + if (!table.ReadU8(&this->diag_neg_max) || + this->diag_neg_max < this->diag_neg_min) { + return parent->Error("OctaboxMetrics: Failed to read valid diag_neg_max"); + } + if (!table.ReadU8(&this->diag_pos_min)) { + return parent->Error("OctaboxMetrics: Failed to read diag_pos_min"); + } + if (!table.ReadU8(&this->diag_pos_max) || + this->diag_pos_max < this->diag_pos_min) { + return parent->Error("OctaboxMetrics: Failed to read valid diag_pos_max"); + } + + unsigned subboxes_len = 0; // count of 1's in this->subbox_bitmap + for (uint16_t i = this->subbox_bitmap; i; i >>= 1) { + if (i & 0b1) { + ++subboxes_len; + } + } + //this->subboxes.resize(subboxes_len, parent); + for (unsigned i = 0; i < subboxes_len; i++) { + this->subboxes.emplace_back(parent); + if (!this->subboxes[i].ParsePart(table)) { + return parent->Error("OctaboxMetrics: Failed to read subbox[%u]", i); + } + } + return true; +} + +bool OpenTypeGLAT_v3::GlyphAttrs:: +OctaboxMetrics::SerializePart(OTSStream* out) const { + if (!out->WriteU16(this->subbox_bitmap) || + !out->WriteU8(this->diag_neg_min) || + !out->WriteU8(this->diag_neg_max) || + !out->WriteU8(this->diag_pos_min) || + !out->WriteU8(this->diag_pos_max) || + !SerializeParts(this->subboxes, out)) { + return parent->Error("OctaboxMetrics: Failed to write"); + } + return true; +} + +bool OpenTypeGLAT_v3::GlyphAttrs::OctaboxMetrics:: +SubboxEntry::ParsePart(Buffer& table) { + if (!table.ReadU8(&this->left)) { + return parent->Error("SubboxEntry: Failed to read left"); + } + if (!table.ReadU8(&this->right) || this->right < this->left) { + return parent->Error("SubboxEntry: Failed to read valid right"); + } + if (!table.ReadU8(&this->bottom)) { + return parent->Error("SubboxEntry: Failed to read bottom"); + } + if (!table.ReadU8(&this->top) || this->top < this->bottom) { + return parent->Error("SubboxEntry: Failed to read valid top"); + } + if (!table.ReadU8(&this->diag_pos_min)) { + return parent->Error("SubboxEntry: Failed to read diag_pos_min"); + } + if (!table.ReadU8(&this->diag_pos_max) || + this->diag_pos_max < this->diag_pos_min) { + return parent->Error("SubboxEntry: Failed to read valid diag_pos_max"); + } + if (!table.ReadU8(&this->diag_neg_min)) { + return parent->Error("SubboxEntry: Failed to read diag_neg_min"); + } + if (!table.ReadU8(&this->diag_neg_max) || + this->diag_neg_max < this->diag_neg_min) { + return parent->Error("SubboxEntry: Failed to read valid diag_neg_max"); + } + return true; +} + +bool OpenTypeGLAT_v3::GlyphAttrs::OctaboxMetrics:: +SubboxEntry::SerializePart(OTSStream* out) const { + if (!out->WriteU8(this->left) || + !out->WriteU8(this->right) || + !out->WriteU8(this->bottom) || + !out->WriteU8(this->top) || + !out->WriteU8(this->diag_pos_min) || + !out->WriteU8(this->diag_pos_max) || + !out->WriteU8(this->diag_neg_min) || + !out->WriteU8(this->diag_neg_max)) { + return parent->Error("SubboxEntry: Failed to write"); + } + return true; +} + +bool OpenTypeGLAT_v3::GlyphAttrs:: +GlatEntry::ParsePart(Buffer& table) { + if (!table.ReadS16(&this->attNum)) { + return parent->Error("GlatEntry: Failed to read attNum"); + } + if (!table.ReadS16(&this->num) || this->num < 0) { + return parent->Error("GlatEntry: Failed to read valid num"); + } + + //this->attributes.resize(this->num); + for (int i = 0; i < this->num; ++i) { + this->attributes.emplace_back(); + if (!table.ReadS16(&this->attributes[i])) { + return parent->Error("GlatEntry: Failed to read attribute %u", i); + } + } + return true; +} + +bool OpenTypeGLAT_v3::GlyphAttrs:: +GlatEntry::SerializePart(OTSStream* out) const { + if (!out->WriteS16(this->attNum) || + !out->WriteS16(this->num) || + !SerializeParts(this->attributes, out)) { + return parent->Error("GlatEntry: Failed to write"); + } + return true; +} + +// ----------------------------------------------------------------------------- +// OpenTypeGLAT +// ----------------------------------------------------------------------------- + +bool OpenTypeGLAT::Parse(const uint8_t* data, size_t length) { + Buffer table(data, length); + uint32_t version; + if (!table.ReadU32(&version)) { + return DropGraphite("Failed to read version"); + } + switch (version >> 16) { + case 1: + this->handler = new OpenTypeGLAT_v1(this->font, this->tag); + break; + case 2: + this->handler = new OpenTypeGLAT_v2(this->font, this->tag); + break; + case 3: { + this->handler = new OpenTypeGLAT_v3(this->font, this->tag); + break; + } + default: + return DropGraphite("Unsupported table version: %u", version >> 16); + } + return this->handler->Parse(data, length); +} + +bool OpenTypeGLAT::Serialize(OTSStream* out) { + if (!this->handler) { + return Error("No Glat table parsed"); + } + return this->handler->Serialize(out); +} + +} // namespace ots -- cgit v1.2.3