func main() { var loop = flag.Bool("loop", false, "Loop the show") var resize = flag.Bool("resize", false, `Resize image to fit the screen.`) var bgcolor = flag.String("bg", "black", `Background color (named color or rgb(r,g,b)).`) var delay = flag.Duration("delay", 2*time.Second, "Delay between pictures") flag.Usage = func() { fmt.Fprintf(os.Stderr, "usage: %s [ flags ] images...\n", os.Args[0]) flag.PrintDefaults() os.Exit(1) } flag.Parse() w, h := openvg.Init() images := []image.Image{} imgcount := 0 for _, imgfile := range flag.Args() { fmt.Fprintf(os.Stderr, "loading %q ", imgfile) img, err := getimage(imgfile, w, h, *resize) if err != nil { fmt.Fprintln(os.Stderr, err) continue } images = append(images, img) imgcount++ fmt.Fprintln(os.Stderr, "ok") } for { for _, img := range images { ib := img.Bounds() imw, imh := ib.Max.X-ib.Min.X, ib.Max.Y-ib.Min.Y openvg.Start(w, h) openvg.BackgroundColor(*bgcolor) x, y := openvg.VGfloat(w)/2-openvg.VGfloat(imw)/2, openvg.VGfloat(h)/2-openvg.VGfloat(imh)/2 openvg.Img(x, y, img) openvg.End() time.Sleep(*delay) } if !*loop { break } } }
// nytheadlines retrieves data from the New York Times API, decodes and displays it. func (d *display) nytheadlines(section string, thumb bool) { hdim := dimen{x: 0, y: 0, width: d.width, height: d.height / 2} r, err := netread(fmt.Sprintf(NYTfmt, section, NYTAPIkey)) if err != nil { fmt.Fprintf(os.Stderr, "headline read error: %v\n", err) hdim.gerror(d.bgcolor, d.textcolor, "no headlines") return } defer r.Close() var data NYTHeadlines err = json.NewDecoder(r).Decode(&data) if err != nil { fmt.Fprintf(os.Stderr, "decode: %v\n", err) hdim.gerror(d.bgcolor, d.textcolor, "no headlines") return } x := d.width * 0.10 y := d.height * 0.10 thumbsize := int(d.height * 0.05) hdim.regionFill(d.bgcolor, d.textcolor) headsize := d.width / 80 spacing := openvg.VGfloat(thumbsize) for i := len(data.Results) - 1; i >= 0; i-- { openvg.Text(x, y, fromHTML.Replace(data.Results[i].Title), "serif", int(headsize)) if len(data.Results[i].Thumbnail) > 0 { img, imerr := netimage(data.Results[i].Thumbnail) if imerr != nil { continue } g := gift.New() g.Add(gift.Resize(0, thumbsize, gift.LanczosResampling)) gift.Resize(thumbsize, thumbsize, gift.BoxResampling) resized := image.NewRGBA(g.Bounds(img.Bounds())) g.Draw(resized, img) openvg.Img(x-100, y-(spacing*0.25), resized) } y = y + spacing } openvg.Image(d.width*0.05, 15, 30, 30, "poweredby_nytimes_30a.png") openvg.End() }
func main() { var resize = flag.Bool("resize", false, "Resize image to fit the screen.") var bgcolor = flag.String("bg", "black", "Background color (named color or rgb(r,g,b)).") var fgcolor = flag.String("fg", "white", "text color (named color or rgb(r,g,b)).") var title = flag.String("t", "", "text annotation") var fontsize = flag.Float64("fp", 2.0, "fontsize %") var px = flag.Float64("px", 50, "x position %") var py = flag.Float64("py", 50, "y position %") var texty = flag.Float64("ty", 0, "text y %") var exit_code int defer func() { os.Exit(exit_code) }() flag.Usage = func() { fmt.Fprintf(os.Stderr, `usage: %s [ flags ] image-path Set specified image as an overlay screen via OpenVG lib. Default is to put this image to the center. `, os.Args[0]) flag.PrintDefaults() exit_code = 1 return } flag.Parse() if flag.NArg() != 1 { fmt.Fprintf(os.Stderr, "Exactly one image-path argument must be specified.\n") flag.Usage() exit_code = 2 return } openvg.SaveTerm() w, h := openvg.Init() openvg.RawTerm() defer openvg.Finish() defer openvg.RestoreTerm() img, err := getimage(flag.Args()[0], w, h, *resize) if err != nil { exit_code = 3 return } ib := img.Bounds() imw, imh := ib.Max.X-ib.Min.X, ib.Max.Y-ib.Min.Y sig_chan := make(chan os.Signal, 1) signal.Notify(sig_chan, os.Interrupt, os.Kill, syscall.SIGHUP, syscall.SIGTERM, syscall.SIGALRM) openvg.Start(w, h) openvg.BackgroundColor(*bgcolor) var x, y openvg.VGfloat if *px < 0 || *px > 100 { x = openvg.VGfloat(w)/2 - openvg.VGfloat(imw)/2 } else { x = openvg.VGfloat(w)*openvg.VGfloat(*px/100) - openvg.VGfloat(imw)/2 } if *py < 0 || *py > 100 { y = openvg.VGfloat(h)/2 - openvg.VGfloat(imh)/2 } else { y = openvg.VGfloat(h)*openvg.VGfloat(*py/100) - openvg.VGfloat(imh)/2 } openvg.Img(x, y, img) if len(*title) > 0 { var typ openvg.VGfloat fs := openvg.VGfloat(*fontsize/100.0) * openvg.VGfloat(w) if *texty == 0 { typ = y - fs*1.5 } else { typ = openvg.VGfloat(h) * openvg.VGfloat(*texty/100) } openvg.FillColor(*fgcolor) openvg.TextMid(x+openvg.VGfloat(imw)/2, typ, *title, "sans", int(fs)) } openvg.End() _ = <-sig_chan }