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// Copyright 2016 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 "core/fxge/cfx_unicodeencodingex.h"
#include <memory>
#include "core/fpdfapi/font/cpdf_font.h"
#include "core/fxge/fx_font.h"
#include "core/fxge/fx_freetype.h"
#include "third_party/base/ptr_util.h"
namespace {
const uint32_t g_EncodingID[] = {
FXFM_ENCODING_MS_SYMBOL, FXFM_ENCODING_UNICODE,
FXFM_ENCODING_MS_SJIS, FXFM_ENCODING_MS_GB2312,
FXFM_ENCODING_MS_BIG5, FXFM_ENCODING_MS_WANSUNG,
FXFM_ENCODING_MS_JOHAB, FXFM_ENCODING_ADOBE_STANDARD,
FXFM_ENCODING_ADOBE_EXPERT, FXFM_ENCODING_ADOBE_CUSTOM,
FXFM_ENCODING_ADOBE_LATIN_1, FXFM_ENCODING_OLD_LATIN_2,
FXFM_ENCODING_APPLE_ROMAN,
};
std::unique_ptr<CFX_UnicodeEncodingEx> FXFM_CreateFontEncoding(
CFX_Font* pFont,
uint32_t nEncodingID) {
if (FXFT_Select_Charmap(pFont->GetFace(), nEncodingID))
return nullptr;
return pdfium::MakeUnique<CFX_UnicodeEncodingEx>(pFont, nEncodingID);
}
} // namespace
CFX_UnicodeEncodingEx::CFX_UnicodeEncodingEx(CFX_Font* pFont,
uint32_t EncodingID)
: CFX_UnicodeEncoding(pFont), m_nEncodingID(EncodingID) {}
CFX_UnicodeEncodingEx::~CFX_UnicodeEncodingEx() {}
uint32_t CFX_UnicodeEncodingEx::GlyphFromCharCode(uint32_t charcode) {
FXFT_Face face = m_pFont->GetFace();
FT_UInt nIndex = FXFT_Get_Char_Index(face, charcode);
if (nIndex > 0)
return nIndex;
int nmaps = FXFT_Get_Face_CharmapCount(face);
int m = 0;
while (m < nmaps) {
uint32_t nEncodingID =
FXFT_Get_Charmap_Encoding(FXFT_Get_Face_Charmaps(face)[m++]);
if (m_nEncodingID == nEncodingID)
continue;
int error = FXFT_Select_Charmap(face, nEncodingID);
if (error)
continue;
nIndex = FXFT_Get_Char_Index(face, charcode);
if (nIndex > 0) {
m_nEncodingID = nEncodingID;
return nIndex;
}
}
FXFT_Select_Charmap(face, m_nEncodingID);
return 0;
}
uint32_t CFX_UnicodeEncodingEx::CharCodeFromUnicode(wchar_t Unicode) const {
if (m_nEncodingID == FXFM_ENCODING_UNICODE ||
m_nEncodingID == FXFM_ENCODING_MS_SYMBOL) {
return Unicode;
}
FXFT_Face face = m_pFont->GetFace();
int nmaps = FXFT_Get_Face_CharmapCount(face);
for (int i = 0; i < nmaps; i++) {
int nEncodingID =
FXFT_Get_Charmap_Encoding(FXFT_Get_Face_Charmaps(face)[i]);
if (nEncodingID == FXFM_ENCODING_UNICODE ||
nEncodingID == FXFM_ENCODING_MS_SYMBOL) {
return Unicode;
}
}
return CPDF_Font::kInvalidCharCode;
}
std::unique_ptr<CFX_UnicodeEncodingEx> FX_CreateFontEncodingEx(
CFX_Font* pFont,
uint32_t nEncodingID) {
if (!pFont || !pFont->GetFace())
return nullptr;
if (nEncodingID != FXFM_ENCODING_NONE)
return FXFM_CreateFontEncoding(pFont, nEncodingID);
for (size_t i = 0; i < FX_ArraySize(g_EncodingID); ++i) {
std::unique_ptr<CFX_UnicodeEncodingEx> pFontEncoding =
FXFM_CreateFontEncoding(pFont, g_EncodingID[i]);
if (pFontEncoding)
return pFontEncoding;
}
return nullptr;
}
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