sampila
commented
3 months ago Hi @sagar-kalburgi-ripcord,
we tried to reproduce the issue, but when trying to merge the S19-1026-NLP-Tasks.pdf with this our sample pdf document-header-and-footer-simple, it's works fine.
Likely it's due your system doesn't have DejavuSans font installed.
Example Code
/*
* Basic merging of PDF files.
* Simply loads all pages for each file and writes to the output file.
* See pdf_merge_advanced.go for a more advanced version which handles merging document forms (acro forms) also.
*
* Run as: go run pdf_merge.go output.pdf input1.pdf input2.pdf input3.pdf ...
*/
package main
import (
"fmt"
"os"
"github.com/unidoc/unipdf/v3/common/license"
"github.com/unidoc/unipdf/v3/model"
)
func init() {
// Make sure to load your metered License API key prior to using the library.
// If you need a key, you can sign up and create a free one at https://cloud.unidoc.io
err := license.SetMeteredKey(os.Getenv(`UNIDOC_LICENSE_API_KEY`))
if err != nil {
panic(err)
}
}
func main() {
if len(os.Args) < 4 {
fmt.Printf("Requires at least 3 arguments: output_path and 2 input paths\n")
fmt.Printf("Usage: go run pdf_merge.go output.pdf input1.pdf input2.pdf input3.pdf ...\n")
os.Exit(0)
}
outputPath := ""
inputPaths := []string{}
// Sanity check the input arguments.
for i, arg := range os.Args {
if i == 0 {
continue
} else if i == 1 {
outputPath = arg
continue
}
inputPaths = append(inputPaths, arg)
}
err := mergePdf(inputPaths, outputPath)
if err != nil {
fmt.Printf("Error: %v\n", err)
os.Exit(1)
}
fmt.Printf("Complete, see output file: %s\n", outputPath)
}
func mergePdf(inputPaths []string, outputPath string) error {
pdfWriter := model.NewPdfWriter()
for _, inputPath := range inputPaths {
pdfReader, f, err := model.NewPdfReaderFromFile(inputPath, nil)
if err != nil {
return err
}
defer f.Close()
numPages, err := pdfReader.GetNumPages()
if err != nil {
return err
}
for i := 0; i < numPages; i++ {
pageNum := i + 1
page, err := pdfReader.GetPage(pageNum)
if err != nil {
return err
}
err = pdfWriter.AddPage(page)
if err != nil {
return err
}
}
}
fWrite, err := os.Create(outputPath)
if err != nil {
return err
}
defer fWrite.Close()
err = pdfWriter.Write(fWrite)
if err != nil {
return err
}
return nil
}Sample file
document-header-and-footer-simple.pdf
Command to run
go run main.go output.pdf document-header-and-footer-simple.pdf S19-1026-NLP-Tasks.pdf Output PDF
Could you try install the DejavuSans font and run the code?
rcosta-ripcord
sagar-kalburgi-ripcord
Description
Hi, when I use unipdf to merge the attached PDF file with another PDF file, it throws this error
one of the font objects syntax is not valid - BaseFont undefined: Dict(\"BaseFont\": DejaVuSans, \"CharProcs\": IObject:567, \"Encoding\": Dict(\"Differences\": [46, period, 48, zero, one, two, three, four, five, six, seven, eight, nine, 75, K, 77, M, 97, a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, 119, w, 121, y], \"Type\": Encoding, ), \"FirstChar\": 0, \"FontBBox\": [-1021, -463, 1794, 1233], \"FontDescriptor\": IObject:604, \"FontMatrix\": [0.001000, 0, 0, 0.001000, 0, 0], \"LastChar\": 255, \"Name\": DejaVuSans, \"Subtype\": Type3, \"Type\": Font, \"Widths\": IObject:605, )But Adobe reader and Chrome PDF reader are able to render the PDF document without reporting any font related issues at all. So not sure why only unipdf is running into this. It may be that the document itself has the font configured incorrectly, but Adobe reader and Chrome have no problem rendering it correctly at all.
Expected Behavior
Unipdf needs to handle the merge seamlessly.
Actual Behavior
Use unipdf merge functionality using the attached PDF file and another PDF file of your choice to reproduce the error.
Attachments
S19-1026-NLP-Tasks.pdf