package main import (	"bufio"	"code.google.com/p/draw2d/draw2d"	"code.google.com/p/freetype-go/freetype/truetype"	"image"	_ "image/jpeg"	"image/png"	"io/ioutil"	"log"	"math/rand"	"os"	"path"	"strings"	"time") var (	fontname = "gooddog-plain.regular" 	comicfontdata = draw2d.FontData{		Name:   fontname,		Family: draw2d.FontFamilySans,		Style:  draw2d.FontStyleNormal,	} 	comicfont *truetype.Font 	// username -> facename	userface = map[string]string{} 	// facename -> image	faces = map[string]image.Image{}	// slice of facenames	facekeys []string) func init() {	// seed random	rand.Seed(time.Now().Unix()) 	// load font	fnt, err := ioutil.ReadFile(fontname + ".ttf")	if err != nil {		panic(err)	}	comicfont, err = truetype.Parse(fnt)	if err != nil {		panic(err)	} 	draw2d.RegisterFont(comicfontdata, comicfont) 	// load faces	if fis, err := ioutil.ReadDir("faces/"); err != nil {		panic(err)	} else {		for _, fi := range fis {			if i := loadFromPngFile("faces/" + fi.Name()); i != nil {				base := strings.TrimSuffix(fi.Name(), path.Ext(fi.Name()))				log.Printf("loaded face %s", base) 				faces[base] = i				facekeys = append(facekeys, base)			}		}	}} func saveToPngFile(filePath string, m image.Image) {	f, err := os.Create(filePath)	if err != nil {		log.Println(err)		return	}	defer f.Close()	b := bufio.NewWriter(f)	err = png.Encode(b, m)	if err != nil {		log.Println(err)		return	}	err = b.Flush()	if err != nil {		log.Println(err)		return	}	log.Printf("Wrote %s OK.\n", filePath)} func loadFromPngFile(filePath string) image.Image {	f, err := os.OpenFile(filePath, 0, 0)	if f == nil {		log.Printf("can't open file; err=%s\n", err)		return nil	}	defer f.Close()	b := bufio.NewReader(f)	i, _, err := image.Decode(b)	if err != nil {		log.Println(err)		return nil	}	//log.Printf("Read %s OK.\n", filePath)	return i} func makeusercomic(who, text string) image.Image {	var facename string	if fname, ok := userface[who]; !ok {		// assign random face		userface[who] = facekeys[rand.Intn(len(facekeys))]		facename = userface[who]	} else {		facename = fname	} 	i, _ := makecomic(text, facename)	return i} func makecomic(text, face string) (image.Image, error) {	facei := faces[face]	dest := image.NewRGBA(image.Rect(0, 0, 300, 300))	b := dest.Bounds()	gc := draw2d.NewGraphicContext(dest) 	gc.SetFontData(comicfontdata)	gc.SetFontSize(18.0) 	gc.DrawImage(facei) 	gc.StrokeStringAt(text, float64(20), float64((b.Dy())-20))	gc.FillStringAt(text, float64(20), float64((b.Dy())-20)) 	return dest, nil}