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/
mockdisplay.go
92 lines (77 loc) · 1.96 KB
/
mockdisplay.go
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package mockengine
import (
"fmt"
"image"
"image/color"
"io"
"time"
"github.com/bradfitz/rfbgo/rfb"
"github.com/taskcluster/slugid-go/slugid"
"github.com/taskcluster/taskcluster-worker/engines/mock/mocknet"
)
const (
mockDisplayWidth = 480
mockDisplayHeight = 640
)
func newMockDisplay() io.ReadWriteCloser {
// Create listener for randomly generated addr
addr := slugid.Nice()
l, err := mocknet.Listen(addr)
if err != nil {
// This shouldn't be possible
panic(fmt.Sprintf("mocknet.Listen failed using random addr, error: %s", err))
}
// Create and start server
s := rfb.NewServer(mockDisplayWidth, mockDisplayHeight)
go s.Serve(l)
// Dial up to server
conn, err := mocknet.Dial(addr)
if err != nil {
// This shouldn't happen either
panic(fmt.Sprintf("mocknet.Dial failed, error: %s", err))
}
// Handle display when we get a connection from the server
go handleDisplay(<-s.Conns) // This works because Conns has a size 16
// Stop listener, we'll create one for each mock display connection
l.Close()
return conn
}
func handleDisplay(c *rfb.Conn) {
// render display until closed
closed := make(chan struct{})
go renderDisplay(c, closed)
for e := range c.Event {
debug("VNC: display received event: %+v", e)
}
close(closed)
debug("VNC: display connection closed")
}
func renderDisplay(c *rfb.Conn, closed <-chan struct{}) {
img := image.NewRGBA(image.Rect(0, 0, mockDisplayWidth, mockDisplayHeight))
lockedÍmg := rfb.LockableImage{Img: img}
frame := 0
for {
frame++
// Lock image and paint everything the same color.. Use a gradient of frame
// counter... So it'll move a bit...
lockedÍmg.Lock()
col := color.RGBA{
R: uint8(frame % 255),
G: uint8(frame % 255),
B: uint8(frame % 255),
A: 255,
}
for x := 0; x < 256; x++ {
for y := 0; y < 256; y++ {
img.Set(x, y, col)
}
}
lockedÍmg.Unlock()
select {
case c.Feed <- &lockedÍmg:
case <-closed:
return
}
time.Sleep(100 * time.Millisecond)
}
}