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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 "../../../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 = 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);
}
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)
{
return new CFX_UnicodeEncoding(pFont);
}