116 lines
4.0 KiB
C++
116 lines
4.0 KiB
C++
// Copyright 2016 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "core/fxge/cfx_unicodeencodingex.h"
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#include <memory>
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#include "core/fxge/cfx_font.h"
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#include "core/fxge/fx_font.h"
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#include "core/fxge/fx_freetype.h"
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#include "third_party/base/ptr_util.h"
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#define FXFM_ENC_TAG(a, b, c, d) \
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(((uint32_t)(a) << 24) | ((uint32_t)(b) << 16) | ((uint32_t)(c) << 8) | \
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(uint32_t)(d))
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#define FXFM_ENCODING_MS_SYMBOL FXFM_ENC_TAG('s', 'y', 'm', 'b')
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#define FXFM_ENCODING_UNICODE FXFM_ENC_TAG('u', 'n', 'i', 'c')
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#define FXFM_ENCODING_MS_SJIS FXFM_ENC_TAG('s', 'j', 'i', 's')
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#define FXFM_ENCODING_MS_GB2312 FXFM_ENC_TAG('g', 'b', ' ', ' ')
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#define FXFM_ENCODING_MS_BIG5 FXFM_ENC_TAG('b', 'i', 'g', '5')
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#define FXFM_ENCODING_MS_WANSUNG FXFM_ENC_TAG('w', 'a', 'n', 's')
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#define FXFM_ENCODING_MS_JOHAB FXFM_ENC_TAG('j', 'o', 'h', 'a')
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#define FXFM_ENCODING_ADOBE_STANDARD FXFM_ENC_TAG('A', 'D', 'O', 'B')
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#define FXFM_ENCODING_ADOBE_EXPERT FXFM_ENC_TAG('A', 'D', 'B', 'E')
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#define FXFM_ENCODING_ADOBE_CUSTOM FXFM_ENC_TAG('A', 'D', 'B', 'C')
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#define FXFM_ENCODING_ADOBE_LATIN_1 FXFM_ENC_TAG('l', 'a', 't', '1')
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#define FXFM_ENCODING_OLD_LATIN_2 FXFM_ENC_TAG('l', 'a', 't', '2')
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#define FXFM_ENCODING_APPLE_ROMAN FXFM_ENC_TAG('a', 'r', 'm', 'n')
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namespace {
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const uint32_t g_EncodingID[] = {
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FXFM_ENCODING_MS_SYMBOL, FXFM_ENCODING_UNICODE,
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FXFM_ENCODING_MS_SJIS, FXFM_ENCODING_MS_GB2312,
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FXFM_ENCODING_MS_BIG5, FXFM_ENCODING_MS_WANSUNG,
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FXFM_ENCODING_MS_JOHAB, FXFM_ENCODING_ADOBE_STANDARD,
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FXFM_ENCODING_ADOBE_EXPERT, FXFM_ENCODING_ADOBE_CUSTOM,
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FXFM_ENCODING_ADOBE_LATIN_1, FXFM_ENCODING_OLD_LATIN_2,
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FXFM_ENCODING_APPLE_ROMAN,
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};
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std::unique_ptr<CFX_UnicodeEncodingEx> FXFM_CreateFontEncoding(
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CFX_Font* pFont,
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uint32_t nEncodingID) {
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if (FXFT_Select_Charmap(pFont->GetFaceRec(), nEncodingID))
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return nullptr;
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return pdfium::MakeUnique<CFX_UnicodeEncodingEx>(pFont, nEncodingID);
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}
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} // namespace
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CFX_UnicodeEncodingEx::CFX_UnicodeEncodingEx(CFX_Font* pFont,
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uint32_t EncodingID)
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: CFX_UnicodeEncoding(pFont), m_nEncodingID(EncodingID) {}
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CFX_UnicodeEncodingEx::~CFX_UnicodeEncodingEx() {}
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uint32_t CFX_UnicodeEncodingEx::GlyphFromCharCode(uint32_t charcode) {
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FXFT_FaceRec* face = m_pFont->GetFaceRec();
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FT_UInt nIndex = FT_Get_Char_Index(face, charcode);
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if (nIndex > 0)
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return nIndex;
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int nmaps = FXFT_Get_Face_CharmapCount(face);
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int m = 0;
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while (m < nmaps) {
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uint32_t nEncodingID =
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FXFT_Get_Charmap_Encoding(FXFT_Get_Face_Charmaps(face)[m++]);
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if (m_nEncodingID == nEncodingID)
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continue;
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int error = FXFT_Select_Charmap(face, nEncodingID);
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if (error)
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continue;
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nIndex = FT_Get_Char_Index(face, charcode);
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if (nIndex > 0) {
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m_nEncodingID = nEncodingID;
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return nIndex;
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}
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}
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FXFT_Select_Charmap(face, m_nEncodingID);
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return 0;
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}
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uint32_t CFX_UnicodeEncodingEx::CharCodeFromUnicode(wchar_t Unicode) const {
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if (m_nEncodingID == FXFM_ENCODING_UNICODE ||
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m_nEncodingID == FXFM_ENCODING_MS_SYMBOL) {
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return Unicode;
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}
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FXFT_FaceRec* face = m_pFont->GetFaceRec();
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int nmaps = FXFT_Get_Face_CharmapCount(face);
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for (int i = 0; i < nmaps; i++) {
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int nEncodingID =
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FXFT_Get_Charmap_Encoding(FXFT_Get_Face_Charmaps(face)[i]);
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if (nEncodingID == FXFM_ENCODING_UNICODE ||
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nEncodingID == FXFM_ENCODING_MS_SYMBOL) {
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return Unicode;
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}
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}
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return kInvalidCharCode;
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}
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std::unique_ptr<CFX_UnicodeEncodingEx> FX_CreateFontEncodingEx(
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CFX_Font* pFont) {
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if (!pFont || !pFont->GetFaceRec())
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return nullptr;
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for (uint32_t id : g_EncodingID) {
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auto pFontEncoding = FXFM_CreateFontEncoding(pFont, id);
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if (pFontEncoding)
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return pFontEncoding;
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}
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return nullptr;
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}
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