feat(format): switch to resvg backend

cmd/svg-templater/main.go

@@ -6,8 +6,8 @@ import (
 )
 
 func main() {
-	if !format.CheckInkscape() {
+	if !format.CheckResvg() {
-		panic("Inkscape not found")
+		panic("Resvg not found")
 	}
 	command.PrepareCommandLine()
 	command.HandleCommandline()

pkg/format/formatconverter.go

@@ -2,6 +2,7 @@ package format
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"io"
 	"log"
@@ -43,26 +44,23 @@ func ConvertReader(svgblob []byte, param ConversionParameters) (io.ReadCloser, e
 	}
 	defer os.Remove(file)
 
-	return runCommand(file, param)
-}
-
-func runCommand(input string, param ConversionParameters) (io.ReadCloser, error) {
-	var args []string
-
-	var outExt string
 	switch param.Format {
 	case "png":
-		args = append(args, "--export-type=png")
+		return convertPNG(file, param)
-		outExt = ".png"
-	case "jpg":
-		args = append(args, "--export-type=png") // inkscape doesn't export jpg directly
-		outExt = ".png"
-	case "pdf":
-		args = append(args, "--export-type=pdf")
-		outExt = ".pdf"
-	default:
-		return nil, fmt.Errorf("format not supported: %s", param.Format)
 	}
+	return nil, errors.New("Format not supported")
+}
+
+func convertPNG(input string, param ConversionParameters) (io.ReadCloser, error) {
+	var args []string
+	var outExt string
+
+	fontsdir, err := svg.Storage.GetFontsDir()
+	if err != nil {
+		return nil, err
+	}
+	args = append(args, "--skip-system-fonts")
+	args = append(args, "--use-fonts-dir", fontsdir)
 
 	if param.Width > 0 {
 		args = append(args, "-w", strconv.Itoa(param.Width))
@@ -72,16 +70,16 @@ func runCommand(input string, param ConversionParameters) (io.ReadCloser, error)
 	}
 
 	outFile := strings.TrimSuffix(input, filepath.Ext(input)) + outExt
-	args = append(args, "-o", outFile)
 	args = append(args, input)
+	args = append(args, outFile)
 
-	cmd := exec.Command("inkscape", args...)
+	cmd := exec.Command("resvg", args...)
 	cmd.Dir = svg.TempDir
 
 	out, err := cmd.CombinedOutput()
 	log.Println(string(out))
 	if err != nil {
-		return nil, fmt.Errorf("inkscape failed: %w: %s", err, string(out))
+		return nil, fmt.Errorf("resvg failed: %w: %s", err, string(out))
 	}
 
 	file, err := os.Open(outFile)
@@ -92,7 +90,7 @@ func runCommand(input string, param ConversionParameters) (io.ReadCloser, error)
 	return file, nil
 }
 
-func CheckInkscape() bool {
+func CheckResvg() bool {
-	_, err := exec.LookPath("inkscape")
+	_, err := exec.LookPath("resvg")
 	return err == nil
 }