Merge pull request #9 from foxbot/feature/local-gen-command

feature: add command to generate images

README.md

@@ -10,4 +10,6 @@ The assets folder is required and has to be in the current working directory (wh
 
 - To install the library simply `go get github.com/Vexera/LogoGen`.
 - For the webapp you can run `go get github.com/Vexera/LogoGen/cmd/LogoGenWebApp`, and the binary will end up as `$GOPATH/bin/LogoGenWebApp`.
-  - The webapp has a -listen parameter which can be used for chaning the listen address.
+  - The webapp has a -listen parameter which can be used for chaning the listen address.
+- You may also generate images from the command line using `github.com/Vexera/LogoGen/cmd/LogoGen`
+  - Use with -top="top text", -bottom="bottom text", and -output="file.png"

cmd/LogoGen/main.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"image/png"
+	"os"
+
+	"github.com/Vexera/LogoGen"
+)
+
+var (
+	output     string
+	topText    string
+	bottomText string
+)
+
+func init() {
+	flag.StringVar(&output, "output", "vexera.png", "-output=path.png")
+	flag.StringVar(&topText, "top", "", `-top="dab"`)
+	flag.StringVar(&bottomText, "bottom", "", `-bottom="bot"`)
+}
+
+func main() {
+	flag.Parse()
+	image, err := LogoGen.CreateLogo(topText, bottomText)
+	if err != nil {
+		fmt.Printf("error generating logo: %+v\n", err)
+		os.Exit(1)
+	}
+	file, err := os.Create(output)
+	if err != nil {
+		fmt.Printf("error opening output file: %+v\n", err)
+		os.Exit(1)
+	}
+	defer file.Close()
+	err = png.Encode(file, image)
+	if err != nil {
+		fmt.Printf("error encoding image: %+v\n", err)
+		os.Exit(1)
+	}
+}