// 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; | |
} | |
#ifdef FOXIT_CHROME_BUILD | |
if (m_pFontDataAllocation) { | |
FX_Free(m_pFontDataAllocation); | |
m_pFontDataAllocation = NULL; | |
} | |
#endif | |
if (m_Face) { | |
#ifdef FOXIT_CHROME_BUILD | |
FXFT_Library library = FXFT_Get_Face_FreeType(m_Face); | |
if (FXFT_Get_Face_External_Stream(m_Face)) { | |
FXFT_Clear_Face_External_Stream(m_Face); | |
} | |
#endif | |
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_ && (!defined(_FPDFAPI_MINI_))) | |
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; | |
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) | |
{ | |
#ifdef FOXIT_CHROME_BUILD | |
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; | |
#else | |
m_Face = FT_LoadFont((FX_LPBYTE)data, size); | |
m_pFontData = (FX_LPBYTE)data; | |
#endif | |
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; | |
} |