| // 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 "../../../include/fxge/fx_ge.h" |
| #include "../../../include/fxge/fx_freetype.h" |
| #include "text_int.h" |
| #define EM_ADJUST(em, a) (em == 0?(a): (a)*1000/em) |
| extern void _FPDFAPI_GetInternalFontData(int id1, FX_LPCBYTE& data, FX_DWORD& size); |
| CFX_Font::CFX_Font() |
| { |
| m_pSubstFont = NULL; |
| m_Face = NULL; |
| m_bEmbedded = FALSE; |
| m_bVertical = FALSE; |
| m_pFontData = NULL; |
| m_pFontDataAllocation = NULL; |
| m_dwSize = 0; |
| m_pOwnedStream = NULL; |
| m_pGsubData = NULL; |
| m_pPlatformFont = NULL; |
| m_pPlatformFontCollection = NULL; |
| m_pDwFont = NULL; |
| m_hHandle = NULL; |
| m_bDwLoaded = FALSE; |
| } |
| CFX_Font::~CFX_Font() |
| { |
| if (m_pSubstFont) { |
| delete m_pSubstFont; |
| m_pSubstFont = NULL; |
| } |
| if (m_pFontDataAllocation) { |
| FX_Free(m_pFontDataAllocation); |
| m_pFontDataAllocation = NULL; |
| } |
| if (m_Face) { |
| if (FXFT_Get_Face_External_Stream(m_Face)) { |
| FXFT_Clear_Face_External_Stream(m_Face); |
| } |
| if(m_bEmbedded) { |
| DeleteFace(); |
| } else { |
| CFX_GEModule::Get()->GetFontMgr()->ReleaseFace(m_Face); |
| } |
| } |
| if (m_pOwnedStream) { |
| FX_Free(m_pOwnedStream); |
| m_pOwnedStream = NULL; |
| } |
| if (m_pGsubData) { |
| FX_Free(m_pGsubData); |
| m_pGsubData = NULL; |
| } |
| #if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ |
| ReleasePlatformResource(); |
| #endif |
| } |
| void CFX_Font::DeleteFace() |
| { |
| FXFT_Done_Face(m_Face); |
| m_Face = NULL; |
| } |
| FX_BOOL CFX_Font::LoadSubst(const CFX_ByteString& face_name, FX_BOOL bTrueType, FX_DWORD flags, |
| int weight, int italic_angle, int CharsetCP, FX_BOOL bVertical) |
| { |
| m_bEmbedded = FALSE; |
| m_bVertical = bVertical; |
| m_pSubstFont = FX_NEW CFX_SubstFont; |
| if (!m_pSubstFont) { |
| return FALSE; |
| } |
| m_Face = CFX_GEModule::Get()->GetFontMgr()->FindSubstFont(face_name, bTrueType, flags, weight, italic_angle, |
| CharsetCP, m_pSubstFont); |
| #if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ |
| if(m_pSubstFont->m_ExtHandle) { |
| m_pPlatformFont = m_pSubstFont->m_ExtHandle; |
| m_pSubstFont->m_ExtHandle = NULL; |
| } |
| #endif |
| if (m_Face) { |
| m_pFontData = FXFT_Get_Face_Stream_Base(m_Face); |
| m_dwSize = FXFT_Get_Face_Stream_Size(m_Face); |
| } |
| return TRUE; |
| } |
| extern "C" { |
| unsigned long _FTStreamRead(FXFT_Stream stream, unsigned long offset, |
| unsigned char* buffer, unsigned long count) |
| { |
| if (count == 0) { |
| return 0; |
| } |
| IFX_FileRead* pFile = (IFX_FileRead*)stream->descriptor.pointer; |
| int res = pFile->ReadBlock(buffer, offset, count); |
| if (res) { |
| return count; |
| } |
| return 0; |
| } |
| void _FTStreamClose(FXFT_Stream stream) |
| { |
| } |
| }; |
| FX_BOOL _LoadFile(FXFT_Library library, FXFT_Face* Face, IFX_FileRead* pFile, FXFT_Stream* stream) |
| { |
| FXFT_Stream stream1 = (FXFT_Stream)FX_Alloc(FX_BYTE, sizeof (FXFT_StreamRec)); |
| if (!stream1) { |
| return FALSE; |
| } |
| stream1->base = NULL; |
| stream1->size = (unsigned long)pFile->GetSize(); |
| stream1->pos = 0; |
| stream1->descriptor.pointer = pFile; |
| stream1->close = _FTStreamClose; |
| stream1->read = _FTStreamRead; |
| FXFT_Open_Args args; |
| args.flags = FT_OPEN_STREAM; |
| args.stream = stream1; |
| if (FXFT_Open_Face(library, &args, 0, Face)) { |
| FX_Free(stream1); |
| return FALSE; |
| } |
| if (stream) { |
| *stream = stream1; |
| } |
| return TRUE; |
| } |
| FX_BOOL CFX_Font::LoadFile(IFX_FileRead* pFile) |
| { |
| m_bEmbedded = FALSE; |
| FXFT_Library library; |
| if (CFX_GEModule::Get()->GetFontMgr()->m_FTLibrary == NULL) { |
| FXFT_Init_FreeType(&CFX_GEModule::Get()->GetFontMgr()->m_FTLibrary); |
| } |
| library = CFX_GEModule::Get()->GetFontMgr()->m_FTLibrary; |
| FXFT_Stream stream = NULL; |
| if (!_LoadFile(library, &m_Face, pFile, &stream)) { |
| return FALSE; |
| } |
| m_pOwnedStream = stream; |
| FXFT_Set_Pixel_Sizes(m_Face, 0, 64); |
| return TRUE; |
| } |
| int CFX_Font::GetGlyphWidth(FX_DWORD glyph_index) |
| { |
| if (!m_Face) { |
| return 0; |
| } |
| if (m_pSubstFont && (m_pSubstFont->m_SubstFlags & FXFONT_SUBST_MM)) { |
| AdjustMMParams(glyph_index, 0, 0); |
| } |
| int err = FXFT_Load_Glyph(m_Face, glyph_index, FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH); |
| if (err) { |
| return 0; |
| } |
| int width = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Glyph_HoriAdvance(m_Face)); |
| return width; |
| } |
| static FXFT_Face FT_LoadFont(FX_LPBYTE pData, int size) |
| { |
| FXFT_Library library; |
| if (CFX_GEModule::Get()->GetFontMgr()->m_FTLibrary == NULL) { |
| FXFT_Init_FreeType(&CFX_GEModule::Get()->GetFontMgr()->m_FTLibrary); |
| } |
| library = CFX_GEModule::Get()->GetFontMgr()->m_FTLibrary; |
| FXFT_Face face = NULL; |
| int error = FXFT_New_Memory_Face(library, pData, size, 0, &face); |
| if (error) { |
| return NULL; |
| } |
| error = FXFT_Set_Pixel_Sizes(face, 64, 64); |
| if (error) { |
| return NULL; |
| } |
| return face; |
| } |
| FX_BOOL CFX_Font::LoadEmbedded(FX_LPCBYTE data, FX_DWORD size) |
| { |
| m_pFontDataAllocation = FX_Alloc(FX_BYTE, size); |
| if (!m_pFontDataAllocation) { |
| return FALSE; |
| } |
| FXSYS_memcpy32(m_pFontDataAllocation, data, size); |
| m_Face = FT_LoadFont((FX_LPBYTE)m_pFontDataAllocation, size); |
| m_pFontData = (FX_LPBYTE)m_pFontDataAllocation; |
| m_bEmbedded = TRUE; |
| m_dwSize = size; |
| return m_Face != NULL; |
| } |
| FX_BOOL CFX_Font::IsTTFont() |
| { |
| if (m_Face == NULL) { |
| return FALSE; |
| } |
| return FXFT_Is_Face_TT_OT(m_Face) == FXFT_FACE_FLAG_SFNT; |
| } |
| int CFX_Font::GetAscent() const |
| { |
| if (m_Face == NULL) { |
| return 0; |
| } |
| int ascent = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_Ascender(m_Face)); |
| return ascent; |
| } |
| int CFX_Font::GetDescent() const |
| { |
| if (m_Face == NULL) { |
| return 0; |
| } |
| int descent = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_Descender(m_Face)); |
| return descent; |
| } |
| FX_BOOL CFX_Font::GetGlyphBBox(FX_DWORD glyph_index, FX_RECT &bbox) |
| { |
| if (m_Face == NULL) { |
| return FALSE; |
| } |
| if (FXFT_Is_Face_Tricky(m_Face)) { |
| int error = FXFT_Set_Char_Size(m_Face, 0, 1000 * 64, 72, 72); |
| if (error) { |
| return FALSE; |
| } |
| error = FXFT_Load_Glyph(m_Face, glyph_index, FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH); |
| if (error) { |
| return FALSE; |
| } |
| FXFT_BBox cbox; |
| FT_Glyph glyph; |
| error = FXFT_Get_Glyph(((FXFT_Face)m_Face)->glyph, &glyph); |
| if (error) { |
| return FALSE; |
| } |
| FXFT_Glyph_Get_CBox(glyph, FXFT_GLYPH_BBOX_PIXELS, &cbox); |
| int pixel_size_x = ((FXFT_Face)m_Face)->size->metrics.x_ppem, |
| pixel_size_y = ((FXFT_Face)m_Face)->size->metrics.y_ppem; |
| if (pixel_size_x == 0 || pixel_size_y == 0) { |
| bbox.left = cbox.xMin; |
| bbox.right = cbox.xMax; |
| bbox.top = cbox.yMax; |
| bbox.bottom = cbox.yMin; |
| } else { |
| bbox.left = cbox.xMin * 1000 / pixel_size_x; |
| bbox.right = cbox.xMax * 1000 / pixel_size_x; |
| bbox.top = cbox.yMax * 1000 / pixel_size_y; |
| bbox.bottom = cbox.yMin * 1000 / pixel_size_y; |
| } |
| if (bbox.top > FXFT_Get_Face_Ascender(m_Face)) { |
| bbox.top = FXFT_Get_Face_Ascender(m_Face); |
| } |
| if (bbox.bottom < FXFT_Get_Face_Descender(m_Face)) { |
| bbox.bottom = FXFT_Get_Face_Descender(m_Face); |
| } |
| FT_Done_Glyph(glyph); |
| return FXFT_Set_Pixel_Sizes(m_Face, 0, 64) == 0; |
| } |
| if (FXFT_Load_Glyph(m_Face, glyph_index, FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) { |
| return FALSE; |
| } |
| int em = FXFT_Get_Face_UnitsPerEM(m_Face); |
| if (em == 0) { |
| bbox.left = FXFT_Get_Glyph_HoriBearingX(m_Face); |
| bbox.bottom = FXFT_Get_Glyph_HoriBearingY(m_Face); |
| bbox.top = bbox.bottom - FXFT_Get_Glyph_Height(m_Face); |
| bbox.right = bbox.left + FXFT_Get_Glyph_Width(m_Face); |
| } else { |
| bbox.left = FXFT_Get_Glyph_HoriBearingX(m_Face) * 1000 / em; |
| bbox.top = (FXFT_Get_Glyph_HoriBearingY(m_Face) - FXFT_Get_Glyph_Height(m_Face)) * 1000 / em; |
| bbox.right = (FXFT_Get_Glyph_HoriBearingX(m_Face) + FXFT_Get_Glyph_Width(m_Face)) * 1000 / em; |
| bbox.bottom = (FXFT_Get_Glyph_HoriBearingY(m_Face)) * 1000 / em; |
| } |
| return TRUE; |
| } |
| FX_BOOL CFX_Font::IsItalic() |
| { |
| if (m_Face == NULL) { |
| return FALSE; |
| } |
| FX_BOOL ret = FXFT_Is_Face_Italic(m_Face) == FXFT_STYLE_FLAG_ITALIC; |
| if (!ret) { |
| CFX_ByteString str(FXFT_Get_Face_Style_Name(m_Face)); |
| str.MakeLower(); |
| if (str.Find("italic") != -1) { |
| ret = TRUE; |
| } |
| } |
| return ret; |
| } |
| FX_BOOL CFX_Font::IsBold() |
| { |
| if (m_Face == NULL) { |
| return FALSE; |
| } |
| return FXFT_Is_Face_Bold(m_Face) == FXFT_STYLE_FLAG_BOLD; |
| } |
| FX_BOOL CFX_Font::IsFixedWidth() |
| { |
| if (m_Face == NULL) { |
| return FALSE; |
| } |
| return FXFT_Is_Face_fixedwidth(m_Face); |
| } |
| CFX_WideString CFX_Font::GetPsName() const |
| { |
| if (m_Face == NULL) { |
| return CFX_WideString(); |
| } |
| CFX_WideString psName = CFX_WideString::FromLocal(FXFT_Get_Postscript_Name(m_Face)); |
| if (psName.IsEmpty()) { |
| psName = CFX_WideString::FromLocal("Untitled"); |
| } |
| return psName; |
| } |
| CFX_ByteString CFX_Font::GetFamilyName() const |
| { |
| if (m_Face == NULL && m_pSubstFont == NULL) { |
| return CFX_ByteString(); |
| } |
| if (m_Face) { |
| return CFX_ByteString(FXFT_Get_Face_Family_Name(m_Face)); |
| } else { |
| return m_pSubstFont->m_Family; |
| } |
| } |
| CFX_ByteString CFX_Font::GetFaceName() const |
| { |
| if (m_Face == NULL && m_pSubstFont == NULL) { |
| return CFX_ByteString(); |
| } |
| if (m_Face) { |
| CFX_ByteString facename; |
| CFX_ByteString style = CFX_ByteString(FXFT_Get_Face_Style_Name(m_Face)); |
| facename = GetFamilyName(); |
| if (facename.IsEmpty()) { |
| facename = "Untitled"; |
| } |
| if (!style.IsEmpty() && style != "Regular") { |
| facename += " " + style; |
| } |
| return facename; |
| } else { |
| return m_pSubstFont->m_Family; |
| } |
| } |
| FX_BOOL CFX_Font::GetBBox(FX_RECT &bbox) |
| { |
| if (m_Face == NULL) { |
| return FALSE; |
| } |
| int em = FXFT_Get_Face_UnitsPerEM(m_Face); |
| if (em == 0) { |
| bbox.left = FXFT_Get_Face_xMin(m_Face); |
| bbox.bottom = FXFT_Get_Face_yMax(m_Face); |
| bbox.top = FXFT_Get_Face_yMin(m_Face); |
| bbox.right = FXFT_Get_Face_xMax(m_Face); |
| } else { |
| bbox.left = FXFT_Get_Face_xMin(m_Face) * 1000 / em; |
| bbox.top = FXFT_Get_Face_yMin(m_Face) * 1000 / em; |
| bbox.right = FXFT_Get_Face_xMax(m_Face) * 1000 / em; |
| bbox.bottom = FXFT_Get_Face_yMax(m_Face) * 1000 / em; |
| } |
| return TRUE; |
| } |
| int CFX_Font::GetHeight() |
| { |
| if (m_Face == NULL) { |
| return 0; |
| } |
| int height = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_Height(m_Face)); |
| return height; |
| } |
| int CFX_Font::GetMaxAdvanceWidth() |
| { |
| if (m_Face == NULL) { |
| return 0; |
| } |
| int width = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_MaxAdvanceWidth(m_Face)); |
| return width; |
| } |
| int CFX_Font::GetULPos() |
| { |
| if (m_Face == NULL) { |
| return 0; |
| } |
| int pos = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_UnderLinePosition(m_Face)); |
| return pos; |
| } |
| int CFX_Font::GetULthickness() |
| { |
| if (m_Face == NULL) { |
| return 0; |
| } |
| int thickness = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_UnderLineThickness(m_Face)); |
| return thickness; |
| } |
| CFX_UnicodeEncoding::CFX_UnicodeEncoding(CFX_Font* pFont) |
| { |
| m_pFont = pFont; |
| } |
| FX_DWORD CFX_UnicodeEncoding::GlyphFromCharCode(FX_DWORD charcode) |
| { |
| FXFT_Face face = m_pFont->GetFace(); |
| if (!face) { |
| return charcode; |
| } |
| if (FXFT_Select_Charmap(face, FXFT_ENCODING_UNICODE) == 0) { |
| return FXFT_Get_Char_Index(face, charcode); |
| } |
| if (m_pFont->m_pSubstFont && m_pFont->m_pSubstFont->m_Charset == 2) { |
| FX_DWORD index = 0; |
| if (FXFT_Select_Charmap(face, FXFT_ENCODING_MS_SYMBOL) == 0) { |
| index = FXFT_Get_Char_Index(face, charcode); |
| } |
| if (!index && !FXFT_Select_Charmap(face, FXFT_ENCODING_APPLE_ROMAN)) { |
| return FXFT_Get_Char_Index(face, charcode); |
| } |
| } |
| return charcode; |
| } |
| FX_DWORD CFX_UnicodeEncoding::GlyphFromCharCodeEx(FX_DWORD charcode, int encoding) |
| { |
| FXFT_Face face = m_pFont->GetFace(); |
| if (!face) { |
| return charcode; |
| } |
| if (encoding == ENCODING_UNICODE) { |
| return GlyphFromCharCode(charcode); |
| } else { |
| int nmaps = FXFT_Get_Face_CharmapCount(m_pFont->m_Face); |
| int i = 0; |
| while (i < nmaps) { |
| int encoding = FXFT_Get_Charmap_Encoding(FXFT_Get_Face_Charmaps(face)[i++]); |
| if (encoding != FXFT_ENCODING_UNICODE) { |
| FXFT_Select_Charmap(face, encoding); |
| break; |
| } |
| } |
| } |
| return FXFT_Get_Char_Index(face, charcode); |
| } |
| IFX_FontEncoding* FXGE_CreateUnicodeEncoding(CFX_Font* pFont) |
| { |
| CFX_UnicodeEncoding* pEncoding = NULL; |
| pEncoding = FX_NEW CFX_UnicodeEncoding(pFont); |
| return pEncoding; |
| } |
