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// 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 "core/include/fxge/fx_freetype.h"
#include "core/include/fxge/fx_ge.h"
#include "text_int.h"
#define EM_ADJUST(em, a) (em == 0 ? (a) : (a)*1000 / em)
#ifdef PDF_ENABLE_XFA
extern void _FPDFAPI_GetInternalFontData(int id1,
const uint8_t*& data,
FX_DWORD& size);
#endif // PDF_ENABLE_XFA
namespace {
#ifdef PDF_ENABLE_XFA
const FX_DWORD 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,
};
CFX_UnicodeEncodingEx* _FXFM_CreateFontEncoding(CFX_Font* pFont,
FX_DWORD nEncodingID) {
if (FXFT_Select_Charmap(pFont->GetFace(), nEncodingID))
return nullptr;
return new CFX_UnicodeEncodingEx(pFont, nEncodingID);
}
#endif // PDF_ENABLE_XFA
FXFT_Face FT_LoadFont(const uint8_t* pData, int size) {
return CFX_GEModule::Get()->GetFontMgr()->GetFixedFace(pData, size, 0);
}
} // namespace
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_pGsubData = NULL;
m_pPlatformFont = NULL;
m_pPlatformFontCollection = NULL;
m_pDwFont = NULL;
m_hHandle = NULL;
m_bDwLoaded = FALSE;
#ifdef PDF_ENABLE_XFA
m_bLogic = FALSE;
m_pOwnedStream = NULL;
#endif // PDF_ENABLE_XFA
}
#ifdef PDF_ENABLE_XFA
FX_BOOL CFX_Font::LoadClone(const CFX_Font* pFont) {
if (pFont == NULL) {
return FALSE;
}
m_bLogic = TRUE;
if (pFont->m_pSubstFont) {
m_pSubstFont = new CFX_SubstFont;
m_pSubstFont->m_Charset = pFont->m_pSubstFont->m_Charset;
m_pSubstFont->m_ExtHandle = pFont->m_pSubstFont->m_ExtHandle;
m_pSubstFont->m_SubstFlags = pFont->m_pSubstFont->m_SubstFlags;
m_pSubstFont->m_Weight = pFont->m_pSubstFont->m_Weight;
m_pSubstFont->m_Family = pFont->m_pSubstFont->m_Family;
m_pSubstFont->m_ItalicAngle = pFont->m_pSubstFont->m_ItalicAngle;
}
if (pFont->m_OtfFontData.GetSize()) {
m_OtfFontData.AttachData(pFont->m_OtfFontData.GetBuffer(),
pFont->m_OtfFontData.GetSize());
}
m_Face = pFont->m_Face;
m_bEmbedded = pFont->m_bEmbedded;
m_bVertical = pFont->m_bVertical;
m_dwSize = pFont->m_dwSize;
m_pFontData = pFont->m_pFontData;
m_pGsubData = pFont->m_pGsubData;
m_pPlatformFont = pFont->m_pPlatformFont;
m_pPlatformFontCollection = pFont->m_pPlatformFontCollection;
m_pDwFont = pFont->m_pDwFont;
m_hHandle = pFont->m_hHandle;
m_bDwLoaded = pFont->m_bDwLoaded;
m_pOwnedStream = pFont->m_pOwnedStream;
return TRUE;
#endif // PDF_ENABLE_XFA
}
CFX_Font::~CFX_Font() {
delete m_pSubstFont;
m_pSubstFont = NULL;
#ifndef PDF_ENABLE_XFA
FX_Free(m_pFontDataAllocation);
m_pFontDataAllocation = NULL;
#else
if (m_bLogic) {
m_OtfFontData.DetachBuffer();
return;
}
#endif // PDF_ENABLE_XFA
if (m_Face) {
#ifndef PDF_ENABLE_XFA
if (FXFT_Get_Face_External_Stream(m_Face)) {
FXFT_Clear_Face_External_Stream(m_Face);
}
#endif // PDF_ENABLE_XFA
if (m_bEmbedded) {
DeleteFace();
} else {
CFX_GEModule::Get()->GetFontMgr()->ReleaseFace(m_Face);
}
}
#ifdef PDF_ENABLE_XFA
FX_Free(m_pOwnedStream);
m_pOwnedStream = NULL;
#endif // PDF_ENABLE_XFA
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;
}
void 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 = new CFX_SubstFont;
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);
}
}
#ifdef PDF_ENABLE_XFA
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,
int32_t faceIndex = 0) {
FXFT_Stream stream1 = (FXFT_Stream)FX_Alloc(uint8_t, sizeof(FXFT_StreamRec));
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, faceIndex, Face)) {
FX_Free(stream1);
return FALSE;
}
if (stream) {
*stream = stream1;
}
return TRUE;
}
FX_BOOL CFX_Font::LoadFile(IFX_FileRead* pFile,
int nFaceIndex,
int* pFaceCount) {
m_bEmbedded = FALSE;
CFX_FontMgr* pFontMgr = CFX_GEModule::Get()->GetFontMgr();
pFontMgr->InitFTLibrary();
FXFT_Library library = pFontMgr->GetFTLibrary();
FXFT_Stream stream = nullptr;
if (!_LoadFile(library, &m_Face, pFile, &stream, nFaceIndex))
return FALSE;
if (pFaceCount)
*pFaceCount = (int)m_Face->num_faces;
m_pOwnedStream = stream;
FXFT_Set_Pixel_Sizes(m_Face, 0, 64);
return TRUE;
}
#endif // PDF_ENABLE_XFA
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;
}
FX_BOOL CFX_Font::LoadEmbedded(const uint8_t* data, FX_DWORD size) {
m_pFontDataAllocation = FX_Alloc(uint8_t, size);
FXSYS_memcpy(m_pFontDataAllocation, data, size);
m_Face = FT_LoadFont(m_pFontDataAllocation, size);
m_pFontData = m_pFontDataAllocation;
m_bEmbedded = TRUE;
m_dwSize = size;
return m_Face != NULL;
}
FX_BOOL CFX_Font::IsTTFont() const {
if (!m_Face)
return FALSE;
return FXFT_Is_Face_TT_OT(m_Face) == FXFT_FACE_FLAG_SFNT;
}
int CFX_Font::GetAscent() const {
if (!m_Face)
return 0;
return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Face_Ascender(m_Face));
}
int CFX_Font::GetDescent() const {
if (!m_Face)
return 0;
return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Face_Descender(m_Face));
}
FX_BOOL CFX_Font::GetGlyphBBox(FX_DWORD glyph_index, FX_RECT& bbox) {
if (!m_Face)
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() const {
if (!m_Face)
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() const {
if (!m_Face)
return FALSE;
return FXFT_Is_Face_Bold(m_Face) == FXFT_STYLE_FLAG_BOLD;
}
FX_BOOL CFX_Font::IsFixedWidth() const {
if (!m_Face)
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));
}
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;
}
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() const {
if (!m_Face)
return 0;
return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Face_Height(m_Face));
}
int CFX_Font::GetMaxAdvanceWidth() const {
if (!m_Face)
return 0;
return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Face_MaxAdvanceWidth(m_Face));
}
int CFX_Font::GetULPos() const {
if (!m_Face)
return 0;
return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Face_UnderLinePosition(m_Face));
}
int CFX_Font::GetULthickness() const {
if (!m_Face)
return 0;
return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Face_UnderLineThickness(m_Face));
}
CFX_UnicodeEncoding::CFX_UnicodeEncoding(CFX_Font* pFont) : m_pFont(pFont) {
}
CFX_UnicodeEncoding::~CFX_UnicodeEncoding() {
}
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->GetSubstFont() && m_pFont->GetSubstFont()->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;
}
#ifdef PDF_ENABLE_XFA
CFX_UnicodeEncodingEx::CFX_UnicodeEncodingEx(CFX_Font* pFont,
FX_DWORD EncodingID)
: CFX_UnicodeEncoding(pFont), m_nEncodingID(EncodingID) {
}
CFX_UnicodeEncodingEx::~CFX_UnicodeEncodingEx() {
}
FX_DWORD CFX_UnicodeEncodingEx::GlyphFromCharCode(FX_DWORD 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) {
int 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;
}
FX_DWORD CFX_UnicodeEncodingEx::CharCodeFromUnicode(FX_WCHAR 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 -1;
}
CFX_UnicodeEncodingEx* FX_CreateFontEncodingEx(CFX_Font* pFont,
FX_DWORD 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) {
CFX_UnicodeEncodingEx* pFontEncoding =
_FXFM_CreateFontEncoding(pFont, g_EncodingID[i]);
if (pFontEncoding) {
return pFontEncoding;
}
}
return NULL;
}
#endif // PDF_ENABLE_XFA
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