File name
Commit message
Commit date
File name
Commit message
Commit date
File name
Commit message
Commit date
File name
Commit message
Commit date
File name
Commit message
Commit date
import r from '@foliojs-fork/restructure';
import TTFFont from './TTFFont';
let DFontName = new r.String(r.uint8);
let DFontData = new r.Struct({
len: r.uint32,
buf: new r.Buffer('len')
});
let Ref = new r.Struct({
id: r.uint16,
nameOffset: r.int16,
attr: r.uint8,
dataOffset: r.uint24,
handle: r.uint32
});
let Type = new r.Struct({
name: new r.String(4),
maxTypeIndex: r.uint16,
refList: new r.Pointer(r.uint16, new r.Array(Ref, t => t.maxTypeIndex + 1), { type: 'parent' })
});
let TypeList = new r.Struct({
length: r.uint16,
types: new r.Array(Type, t => t.length + 1)
});
let DFontMap = new r.Struct({
reserved: new r.Reserved(r.uint8, 24),
typeList: new r.Pointer(r.uint16, TypeList),
nameListOffset: new r.Pointer(r.uint16, 'void')
});
let DFontHeader = new r.Struct({
dataOffset: r.uint32,
map: new r.Pointer(r.uint32, DFontMap),
dataLength: r.uint32,
mapLength: r.uint32
});
export default class DFont {
static probe(buffer) {
let stream = new r.DecodeStream(buffer);
try {
var header = DFontHeader.decode(stream);
} catch (e) {
return false;
}
for (let type of header.map.typeList.types) {
if (type.name === 'sfnt') {
return true;
}
}
return false;
}
constructor(stream) {
this.stream = stream;
this.header = DFontHeader.decode(this.stream);
for (let type of this.header.map.typeList.types) {
for (let ref of type.refList) {
if (ref.nameOffset >= 0) {
this.stream.pos = ref.nameOffset + this.header.map.nameListOffset;
ref.name = DFontName.decode(this.stream);
} else {
ref.name = null;
}
}
if (type.name === 'sfnt') {
this.sfnt = type;
}
}
}
getFont(name) {
if (!this.sfnt) {
return null;
}
for (let ref of this.sfnt.refList) {
let pos = this.header.dataOffset + ref.dataOffset + 4;
let stream = new r.DecodeStream(this.stream.buffer.slice(pos));
let font = new TTFFont(stream);
if (font.postscriptName === name) {
return font;
}
}
return null;
}
get fonts() {
let fonts = [];
for (let ref of this.sfnt.refList) {
let pos = this.header.dataOffset + ref.dataOffset + 4;
let stream = new r.DecodeStream(this.stream.buffer.slice(pos));
fonts.push(new TTFFont(stream));
}
return fonts;
}
}