| // 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/fxge/cfx_font.h" |
| #include "core/fxge/fx_font.h" |
| #include "core/fxge/fx_freetype.h" |
| #include "third_party/base/ptr_util.h" |
| |
| #define FXFM_ENC_TAG(a, b, c, d) \ |
| (((uint32_t)(a) << 24) | ((uint32_t)(b) << 16) | ((uint32_t)(c) << 8) | \ |
| (uint32_t)(d)) |
| #define FXFM_ENCODING_MS_SYMBOL FXFM_ENC_TAG('s', 'y', 'm', 'b') |
| #define FXFM_ENCODING_UNICODE FXFM_ENC_TAG('u', 'n', 'i', 'c') |
| #define FXFM_ENCODING_MS_SJIS FXFM_ENC_TAG('s', 'j', 'i', 's') |
| #define FXFM_ENCODING_MS_GB2312 FXFM_ENC_TAG('g', 'b', ' ', ' ') |
| #define FXFM_ENCODING_MS_BIG5 FXFM_ENC_TAG('b', 'i', 'g', '5') |
| #define FXFM_ENCODING_MS_WANSUNG FXFM_ENC_TAG('w', 'a', 'n', 's') |
| #define FXFM_ENCODING_MS_JOHAB FXFM_ENC_TAG('j', 'o', 'h', 'a') |
| #define FXFM_ENCODING_ADOBE_STANDARD FXFM_ENC_TAG('A', 'D', 'O', 'B') |
| #define FXFM_ENCODING_ADOBE_EXPERT FXFM_ENC_TAG('A', 'D', 'B', 'E') |
| #define FXFM_ENCODING_ADOBE_CUSTOM FXFM_ENC_TAG('A', 'D', 'B', 'C') |
| #define FXFM_ENCODING_ADOBE_LATIN_1 FXFM_ENC_TAG('l', 'a', 't', '1') |
| #define FXFM_ENCODING_OLD_LATIN_2 FXFM_ENC_TAG('l', 'a', 't', '2') |
| #define FXFM_ENCODING_APPLE_ROMAN FXFM_ENC_TAG('a', 'r', 'm', 'n') |
| |
| 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->GetFaceRec(), 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_FaceRec* face = m_pFont->GetFaceRec(); |
| FT_UInt nIndex = FT_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 = FT_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_FaceRec* face = m_pFont->GetFaceRec(); |
| 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 kInvalidCharCode; |
| } |
| |
| std::unique_ptr<CFX_UnicodeEncodingEx> FX_CreateFontEncodingEx( |
| CFX_Font* pFont) { |
| if (!pFont || !pFont->GetFaceRec()) |
| return nullptr; |
| |
| for (uint32_t id : g_EncodingID) { |
| auto pFontEncoding = FXFM_CreateFontEncoding(pFont, id); |
| if (pFontEncoding) |
| return pFontEncoding; |
| } |
| return nullptr; |
| } |