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// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include <memory>
#include "core/fxge/cfx_fontmapper.h"
#include "core/fxge/systemfontinfo_iface.h"
static ByteString GetStringFromTable(const uint8_t* string_ptr,
uint32_t string_ptr_length,
uint16_t offset,
uint16_t length) {
if (string_ptr_length < static_cast<uint32_t>(offset + length)) {
return ByteString();
}
return ByteString(string_ptr + offset, length);
}
ByteString GetNameFromTT(const uint8_t* name_table,
uint32_t name_table_size,
uint32_t name_id) {
if (!name_table || name_table_size < 6) {
return ByteString();
}
uint32_t name_count = GET_TT_SHORT(name_table + 2);
uint32_t string_offset = GET_TT_SHORT(name_table + 4);
// We will ignore the possibility of overlap of structures and
// string table as if it's all corrupt there's not a lot we can do.
if (name_table_size < string_offset) {
return ByteString();
}
const uint8_t* string_ptr = name_table + string_offset;
uint32_t string_ptr_size = name_table_size - string_offset;
name_table += 6;
name_table_size -= 6;
if (name_table_size < name_count * 12) {
return ByteString();
}
for (uint32_t i = 0; i < name_count; i++, name_table += 12) {
if (GET_TT_SHORT(name_table + 6) == name_id &&
GET_TT_SHORT(name_table) == 1 && GET_TT_SHORT(name_table + 2) == 0) {
return GetStringFromTable(string_ptr, string_ptr_size,
GET_TT_SHORT(name_table + 10),
GET_TT_SHORT(name_table + 8));
}
}
return ByteString();
}
#ifdef PDF_ENABLE_XFA
void* SystemFontInfoIface::MapFontByUnicode(uint32_t dwUnicode,
int weight,
bool bItalic,
int pitch_family) {
return nullptr;
}
#endif // PDF_ENABLE_XFA
int SystemFontInfoIface::GetFaceIndex(void* hFont) {
return 0;
}
extern "C" {
unsigned long _FTStreamRead(FXFT_Stream stream,
unsigned long offset,
unsigned char* buffer,
unsigned long count);
void _FTStreamClose(FXFT_Stream stream);
};
#if _FX_OS_ == _FX_OS_ANDROID_
std::unique_ptr<SystemFontInfoIface> SystemFontInfoIface::CreateDefault(
const char** pUnused) {
return nullptr;
}
#endif
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