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main.go
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main.go
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// seehuhn.de/go/pdf - a library for reading and writing PDF files
// Copyright (C) 2021 Jochen Voss <voss@seehuhn.de>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package main
import (
"fmt"
"log"
"os"
"seehuhn.de/go/sfnt"
"seehuhn.de/go/sfnt/opentype/gtab/builder"
)
func main() {
if len(os.Args) < 2 {
fmt.Fprintln(os.Stderr, "usage: otf-illustrate-gpos font.otf")
os.Exit(1)
}
fontFileName := os.Args[1]
fd, err := os.Open(fontFileName)
if err != nil {
log.Fatal(err)
}
defer fd.Close()
info, err := sfnt.Read(fd)
if err != nil {
log.Fatal(err)
}
if info.Gpos == nil {
log.Fatal("font has no GPOS table")
}
explained := builder.ExplainGpos(info)
for i, e := range explained {
fmt.Printf("%d: %s\n", i, e)
}
}