func (te *TextElement) getContext() *freetype.Context { c := freetype.NewContext() c.SetDPI(75) c.SetFont(te.props.textFont) c.SetFontSize(float64(te.props.textSize)) c.SetSrc(image.NewUniform(te.props.textColor)) c.SetHinting(font.HintingNone) return c }
func main() { flag.Parse() // Read the font data. fontBytes, err := ioutil.ReadFile(*fontfile) if err != nil { log.Println(err) return } f, err := freetype.ParseFont(fontBytes) if err != nil { log.Println(err) return } // Initialize the context. fg, bg := image.Black, image.White if *wonb { fg, bg = image.White, image.Black } c := freetype.NewContext() c.SetDPI(*dpi) c.SetFont(f) c.SetFontSize(*size) c.SetSrc(fg) switch *hinting { default: c.SetHinting(font.HintingNone) case "full": c.SetHinting(font.HintingFull) } var width fixed.Int26_6 var height fixed.Int26_6 for _, s := range text { dimensions, _ := c.StringDimensions(s) height = height + dimensions.Y if dimensions.X > width { width = dimensions.X } } imgWidth := int(width >> 6) imgHeight := int(height >> 6) fmt.Println(imgWidth, imgHeight) rgba := image.NewRGBA(image.Rect(0, 0, imgWidth, imgHeight)) draw.Draw(rgba, rgba.Bounds(), bg, image.ZP, draw.Src) c.SetClip(rgba.Bounds()) c.SetDst(rgba) // Draw the text. pt := freetype.Pt(0, int(c.PointToFixed(*size)>>6)) for _, s := range text { _, err = c.DrawString(s, pt) if err != nil { log.Println(err) return } pt.Y += c.PointToFixed(*size * *spacing) } // Save that RGBA image to disk. outFile, err := os.Create("out.png") if err != nil { log.Println(err) os.Exit(1) } defer outFile.Close() b := bufio.NewWriter(outFile) err = png.Encode(b, rgba) if err != nil { log.Println(err) os.Exit(1) } err = b.Flush() if err != nil { log.Println(err) os.Exit(1) } fmt.Println("Wrote out.png OK.") }