next steps

Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>

example/server/main.go

@@ -2,8 +2,12 @@ package main
 
 import (
 	"context"
+	"fmt"
+	"image"
 	"log"
+	"math"
 	"net"
+	"time"
 
 	vnc "github.com/vtolstov/go-vnc"
 )
@@ -17,10 +21,16 @@ func main() {
 	chServer := make(chan vnc.ClientMessage)
 	chClient := make(chan vnc.ServerMessage)
 
+	im := image.NewRGBA(image.Rect(0, 0, width, height))
+	tick := time.NewTicker(time.Second / 2)
+	defer tick.Stop()
+
 	cfg := &vnc.ServerConfig{
+		Width:             800,
+		Height:            600,
 		VersionHandler:    vnc.ServerVersionHandler,
 		SecurityHandler:   vnc.ServerSecurityHandler,
-		SecurityHandlers:  []vnc.ServerHandler{vnc.ServerSecurityNoneHandler},
+		SecurityHandlers:  []vnc.SecurityHandler{&vnc.ClientAuthNone{}},
 		ClientInitHandler: vnc.ServerClientInitHandler,
 		ServerInitHandler: vnc.ServerServerInitHandler,
 		Encodings:         []vnc.Encoding{&vnc.RawEncoding{}},
@@ -33,10 +43,51 @@ func main() {
 
 	// Process messages coming in on the ClientMessage channel.
 	for {
-		msg := <-chClient
-		switch msg.Type() {
-		default:
-			log.Printf("Received message type:%v msg:%v\n", msg.Type(), msg)
+		select {
+		case <-tick.C:
+			drawImage(im, 0)
+			fmt.Printf("tick\n")
+		case msg := <-chClient:
+			switch msg.Type() {
+			default:
+				log.Printf("11 Received message type:%v msg:%v\n", msg.Type(), msg)
+			}
+		case msg := <-chServer:
+			switch msg.Type() {
+			default:
+				log.Printf("22 Received message type:%v msg:%v\n", msg.Type(), msg)
+			}
+		}
+	}
+}
+
+const (
+	width  = 800
+	height = 600
+)
+
+func drawImage(im *image.RGBA, anim int) {
+	pos := 0
+	const border = 50
+	for y := 0; y < height; y++ {
+		for x := 0; x < width; x++ {
+			var r, g, b uint8
+			switch {
+			case x < border*2.5 && x < int((1.1+math.Sin(float64(y+anim*2)/40))*border):
+				r = 255
+			case x > width-border*2.5 && x > width-int((1.1+math.Sin(math.Pi+float64(y+anim*2)/40))*border):
+				g = 255
+			case y < border*2.5 && y < int((1.1+math.Sin(float64(x+anim*2)/40))*border):
+				r, g = 255, 255
+			case y > height-border*2.5 && y > height-int((1.1+math.Sin(math.Pi+float64(x+anim*2)/40))*border):
+				b = 255
+			default:
+				r, g, b = uint8(x+anim), uint8(y+anim), uint8(x+y+anim*3)
+			}
+			im.Pix[pos] = r
+			im.Pix[pos+1] = g
+			im.Pix[pos+2] = b
+			pos += 4 // skipping alpha
 		}
 	}
 }