69 lines
1.4 KiB
Go
69 lines
1.4 KiB
Go
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package main
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// This command demonstrates the use of ghotscript to reduce the size
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// of generated PDFs. This is based on a comment made by farkerhaiku:
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// https://github.com/jung-kurt/gofpdf/issues/57#issuecomment-185843315
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import (
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"fmt"
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"os"
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"os/exec"
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"github.com/jung-kurt/gofpdf"
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)
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func report(fileStr string, err error) {
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if err == nil {
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var info os.FileInfo
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info, err = os.Stat(fileStr)
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if err == nil {
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fmt.Printf("%s: OK, size %d\n", fileStr, info.Size())
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} else {
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fmt.Printf("%s: bad stat\n", fileStr)
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}
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} else {
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fmt.Printf("%s: %s\n", fileStr, err)
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}
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}
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func newPdf() (pdf *gofpdf.Fpdf) {
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pdf = gofpdf.New("P", "mm", "A4", "../../font")
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pdf.SetCompression(false)
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pdf.AddFont("Calligrapher", "", "calligra.json")
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pdf.AddPage()
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pdf.SetFont("Calligrapher", "", 35)
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pdf.Cell(0, 10, "Enjoy new fonts with FPDF!")
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return
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}
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func full(name string) {
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report(name, newPdf().OutputFileAndClose(name))
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}
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func min(name string) {
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cmd := exec.Command("gs", "-sDEVICE=pdfwrite",
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"-dCompatibilityLevel=1.4",
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"-dPDFSETTINGS=/screen", "-dNOPAUSE", "-dQUIET",
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"-dBATCH", "-sOutputFile="+name, "-")
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inPipe, err := cmd.StdinPipe()
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if err == nil {
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errChan := make(chan error, 1)
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go func() {
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errChan <- cmd.Start()
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}()
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err = newPdf().Output(inPipe)
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if err == nil {
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report(name, <-errChan)
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} else {
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report(name, err)
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}
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} else {
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report(name, err)
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}
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}
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func main() {
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full("full.pdf")
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min("min.pdf")
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}
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