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FT_fontsys: Add missing GetFontDataSys implementation

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This commit is contained in:
Mirek Fidler 2022-01-15 14:42:23 +01:00
parent 8337e7c250
commit 8826daf070
4 changed files with 63 additions and 41 deletions
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39
uppsrc/Draw/FontCR.cpp
View file

@ -481,4 +481,43 @@ bool Replace(Font fnt, int chr, Font& rfnt)
return false; return false;
} }
String GetFontDataSysSys(Stream& in, int fonti, const char *table, int offset, int size)
{ // read truetype or opentype table from file - common implementation
int q = in.Get32be();
if(q == 0x74746366) { // font collection
in.Get32(); // skip major/minor version
int nfonts = in.Get32be();
if(fonti >= nfonts)
return Null;
in.SeekCur(fonti * 4);
int offset = in.Get32be();
if(offset < 0 || offset >= in.GetSize())
return Null;
in.Seek(offset);
q = in.Get32be();
}
if(q != 0x74727565 && q != 0x00010000 && q != 0x4f54544f) // 0x4f54544f means CCF font!
return Null;
int n = in.Get16be();
in.Get32();
in.Get16();
while(n--) {
if(in.IsError() || in.IsEof()) return Null;
String tab = in.Get(4);
in.Get32();
int off = in.Get32be();
int len = in.Get32be();
if(tab == table) {
if(off < 0 || len < 0 || off + len > in.GetSize())
return Null;
len = min(len - offset, size);
if(len < 0)
return Null;
in.Seek(off + offset);
return in.Get(len);
}
}
return Null;
}
} }

40
uppsrc/Draw/FontFc.cpp
View file

@ -259,46 +259,14 @@ Vector<FaceInfo> GetAllFacesSys()
return list.PickValues(); return list.PickValues();
} }
extern String GetFontDataSysSys(Stream& in, int fonti, const char *table, int offset, int size);
String GetFontDataSys(Font font, const char *table, int offset, int size) String GetFontDataSys(Font font, const char *table, int offset, int size)
{ // read truetype or opentype table {
if(!table) if(!table)
return LoadFile(font.Fi().path); return LoadFile(font.Fi().path);
FileIn in(font.Fi().path); FileIn in(font.Fi().path);
int q = in.Get32be(); return GetFontDataSysSys(in, font.Fi().fonti, table, offset, size);
if(q == 0x74746366) { // font collection
in.Get32(); // skip major/minor version
int nfonts = in.Get32be();
if(font.Fi().fonti >= nfonts)
return Null;
in.SeekCur(font.Fi().fonti * 4);
int offset = in.Get32be();
if(offset < 0 || offset >= in.GetSize())
return Null;
in.Seek(offset);
q = in.Get32be();
}
if(q != 0x74727565 && q != 0x00010000 && q != 0x4f54544f) // 0x4f54544f means CCF font!
return Null;
int n = in.Get16be();
in.Get32();
in.Get16();
while(n--) {
if(in.IsError() || in.IsEof()) return Null;
String tab = in.Get(4);
in.Get32();
int off = in.Get32be();
int len = in.Get32be();
if(tab == table) {
if(off < 0 || len < 0 || off + len > in.GetSize())
return Null;
len = min(len - offset, size);
if(len < 0)
return Null;
in.Seek(off + offset);
return in.Get(len);
}
}
return Null;
} }
static inline double ft_dbl(int p) static inline double ft_dbl(int p)

19
uppsrc/plugin/FT_fontsys/FT_fontsys.cpp
View file

@ -72,9 +72,24 @@ FtFontStyle GetFontStyle(Font font)
return fd.At(0).style[0]; return fd.At(0).style[0];
} }
extern String GetFontDataSysSys(Stream& in, int fonti, const char *table, int offset, int size);
String GetFontDataSys(Font font, const char *table, int offset, int size) String GetFontDataSys(Font font, const char *table, int offset, int size)
{ // TODO: Finish this! {
return Null; FtFontStyle f = GetFontStyle(font);
if(IsNull(f.path)) {
if(table) {
MemReadStream in(f.data, f.size);
return GetFontDataSysSys(in, 0, table, offset, size);
}
return String(f.data, min((int)f.size, 100*1024*1024));
}
if(table) {
FileIn in(f.path);
return GetFontDataSysSys(in, 0, table, offset, size);
}
return LoadFile(f.path);
} }
static FT_Library sFTlib; static FT_Library sFTlib;