131 lines
3.1 KiB
Go
131 lines
3.1 KiB
Go
package main
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import (
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"context"
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"image"
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"log"
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"math"
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"net"
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"time"
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vnc "github.com/unistack-org/go-rfb"
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)
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func main() {
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ln, err := net.Listen("tcp", ":6900")
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if err != nil {
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log.Fatalf("Error listen. %v", err)
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}
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chServer := make(chan vnc.ClientMessage)
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chClient := make(chan vnc.ServerMessage)
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im := image.NewRGBA(image.Rect(0, 0, width, height))
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tick := time.NewTicker(time.Millisecond * 2)
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defer tick.Stop()
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connected := false
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cfg := &vnc.ServerConfig{
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Width: width,
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Height: height,
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Handlers: vnc.DefaultServerHandlers,
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SecurityHandlers: []vnc.SecurityHandler{&vnc.ClientAuthNone{}},
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Encodings: []vnc.Encoding{&vnc.RawEncoding{}},
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PixelFormat: vnc.PixelFormat32bit,
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ClientMessageCh: chServer,
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ServerMessageCh: chClient,
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Messages: vnc.DefaultClientMessages,
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}
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go vnc.Serve(context.Background(), ln, cfg)
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anim := 0
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// Process messages coming in on the ClientMessage channel.
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for {
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select {
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case <-tick.C:
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if !connected {
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continue
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}
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drawImage(im, anim*2)
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anim++
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colors := make([]vnc.Color, 0, 0)
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for y := 0; y < height; y++ {
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for x := 0; x < width; x++ {
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r, g, b, a := im.At(x, y).RGBA()
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clr := rgbaToColor(&cfg.PixelFormat, r, g, b, a)
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colors = append(colors, *clr)
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}
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}
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cfg.ServerMessageCh <- &vnc.FramebufferUpdate{
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NumRect: 1,
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Rects: []*vnc.Rectangle{
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&vnc.Rectangle{
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X: 0,
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Y: 0,
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Width: width,
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Height: height,
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EncType: vnc.EncRaw,
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Enc: &vnc.RawEncoding{
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Colors: colors,
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},
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}}}
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/*
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case msg := <-chClient:
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switch msg.Type() {
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case vnc.FramebufferUpdateMsgType:
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connected = true
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log.Printf("11 Received message type:%v msg:%v\n", msg.Type(), msg)
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default:
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log.Printf("11 Received message type:%v msg:%v\n", msg.Type(), msg)
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}*/
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case msg := <-chServer:
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switch msg.Type() {
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case vnc.FramebufferUpdateRequestMsgType:
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connected = true
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default:
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log.Printf("22 Received message type:%v msg:%v\n", msg.Type(), msg)
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}
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}
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}
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}
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const (
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width = 800
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height = 600
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)
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func rgbaToColor(pf *vnc.PixelFormat, r uint32, g uint32, b uint32, a uint32) *vnc.Color {
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// fix converting rbga to rgb http://marcodiiga.github.io/rgba-to-rgb-conversion
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clr := vnc.NewColor(pf, nil)
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clr.R = uint16(r / 257)
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clr.G = uint16(g / 257)
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clr.B = uint16(b / 257)
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return clr
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}
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func drawImage(im *image.RGBA, anim int) {
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pos := 0
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const border = 50
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for y := 0; y < height; y++ {
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for x := 0; x < width; x++ {
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var r, g, b uint8
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switch {
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case x < border*2.5 && x < int((1.1+math.Sin(float64(y+anim*2)/40))*border):
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r = 255
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case x > width-border*2.5 && x > width-int((1.1+math.Sin(math.Pi+float64(y+anim*2)/40))*border):
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g = 255
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case y < border*2.5 && y < int((1.1+math.Sin(float64(x+anim*2)/40))*border):
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r, g = 255, 255
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case y > height-border*2.5 && y > height-int((1.1+math.Sin(math.Pi+float64(x+anim*2)/40))*border):
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b = 255
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default:
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r, g, b = uint8(x+anim), uint8(y+anim), uint8(x+y+anim*3)
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}
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im.Pix[pos] = r
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im.Pix[pos+1] = g
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im.Pix[pos+2] = b
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pos += 4 // skipping alpha
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}
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}
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}
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