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draw.go
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draw.go
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package main
import (
"context"
"image"
"log"
"time"
"go.yhsif.com/lifxlan"
"go.yhsif.com/lifxlan/tile"
)
func getBoard(
full tile.ColorBoard,
board tile.Board,
horizontal bool,
step int,
) (cb tile.ColorBoard, last bool) {
cb = tile.MakeColorBoard(board.Width(), board.Height())
var fullSize, boardSize int
if horizontal {
fullSize = len(full)
boardSize = board.Width()
} else {
fullSize = len(full[0])
boardSize = board.Height()
}
offset := 0
start := 0
end := step - start
if end > boardSize {
start += (end - boardSize)
}
if end > fullSize {
offset = end - fullSize
end = fullSize
}
last = (end <= start)
for i := start; i < end; i++ {
ci := i - start + offset
fi := fullSize - end + i - start
if horizontal {
for j := 0; j < board.Height(); j++ {
cb[ci][j] = full[fi][j]
}
} else {
for j := 0; j < board.Width(); j++ {
cb[j][ci] = full[j][fi]
}
}
}
return
}
func draw(td tile.Device, img image.Image) {
var step int
full, horizontal := resizeImage(img, td)
conn, err := td.Dial()
if err != nil {
log.Fatal(err)
}
defer conn.Close()
power, err := func() (lifxlan.Power, error) {
ctx, cancel := context.WithTimeout(context.Background(), *drawTimeout*2)
defer cancel()
power, err := td.GetPower(ctx, conn)
if err != nil {
return 0, err
}
if !power.On() && *turnon {
err = td.SetPower(ctx, conn, lifxlan.PowerOn, true)
}
return power, err
}()
if err != nil {
log.Fatal(err)
}
if !power.On() && !*turnon {
log.Fatalf("Device is currently %v, exiting...", power)
}
var origCB tile.ColorBoard
if !loop.Bool && !still.Bool {
func() {
ctx, cancel := context.WithTimeout(context.Background(), *drawTimeout)
defer cancel()
var err error
origCB, err = td.GetColors(ctx, conn)
if err != nil {
log.Fatalf("Cannot get the current colors on %v: %v", td, err)
}
}()
}
if still.Bool {
for {
if err := func() error {
ctx, cancel := context.WithTimeout(context.Background(), *drawTimeout)
defer cancel()
return td.SetColors(ctx, conn, full, 0, *noack)
}(); err != nil {
log.Printf("Failed to set original colors, retrying... %v", err)
} else {
return
}
}
}
for range time.Tick(*interval) {
step++
log.Printf("Step %d...", step)
cb, last := getBoard(full, td, horizontal, step)
start := time.Now()
if err := func() error {
ctx, cancel := context.WithTimeout(context.Background(), *drawTimeout)
defer cancel()
return td.SetColors(ctx, conn, cb, 0, !*noack)
}(); err != nil {
log.Printf("Failed to set colors: %v", err)
if *noskip {
step--
continue
}
} else {
log.Printf("SetColors took %v", time.Since(start))
}
if last {
if loop.Bool {
step = 0
log.Print("Finished. Resetting...")
} else {
break
}
}
}
if !power.On() {
for {
if err := func() error {
ctx, cancel := context.WithTimeout(context.Background(), *drawTimeout)
defer cancel()
return td.SetPower(ctx, conn, power, true)
}(); err != nil {
log.Printf("Failed to turn device %v, retrying... %v", power, err)
} else {
break
}
}
}
for {
if err := func() error {
ctx, cancel := context.WithTimeout(context.Background(), *drawTimeout)
defer cancel()
return td.SetColors(ctx, conn, origCB, 0, true)
}(); err != nil {
log.Printf("Failed to set original colors, retrying... %v", err)
} else {
break
}
}
}