Fix image headers, add Stream Deck+ color mixer with coarse/fine encoders

cmd/deckcolor/main.go

@@ -0,0 +1,118 @@
+package main
+
+import (
+	"fmt"
+	"image"
+	"image/color"
+	"image/draw"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"qrun/lib/streamdeck"
+)
+
+func clamp(v int) int {
+	if v < 0 {
+		return 0
+	}
+	if v > 255 {
+		return 255
+	}
+	return v
+}
+
+func main() {
+	dev, err := streamdeck.OpenModel(&streamdeck.ModelPlus)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+		os.Exit(1)
+	}
+	defer dev.Close()
+
+	dev.SetBrightness(80)
+
+	rgb := [3]int{0, 0, 0}
+	fine := [3]bool{false, false, false}
+	labels := [3]string{"R", "G", "B"}
+	labelColors := [3]color.RGBA{
+		{255, 0, 0, 255},
+		{0, 255, 0, 255},
+		{0, 100, 255, 255},
+	}
+
+	updateLCD := func() {
+		c := color.RGBA{uint8(rgb[0]), uint8(rgb[1]), uint8(rgb[2]), 255}
+		dev.SetLCDColor(0, 0, dev.Model().LCDWidth, dev.Model().LCDHeight, c)
+	}
+
+	updateKey := func(i int) {
+		bg := color.RGBA{labelColors[i].R / 4, labelColors[i].G / 4, labelColors[i].B / 4, 255}
+		sz := dev.Model().KeySize
+		txt := streamdeck.TextImageWithFaceSized(streamdeck.MonoBoldSmall, sz, bg, labelColors[i], labels[i], fmt.Sprintf("%d", rgb[i]))
+		if fine[i] {
+			img := image.NewRGBA(image.Rect(0, 0, sz, sz))
+			draw.Draw(img, img.Bounds(), txt, image.Point{}, draw.Src)
+			border := labelColors[i]
+			b := 4
+			for y := 0; y < sz; y++ {
+				for x := 0; x < sz; x++ {
+					if x < b || x >= sz-b || y < b || y >= sz-b {
+						img.Set(x, y, border)
+					}
+				}
+			}
+			dev.SetKeyImage(i, img)
+		} else {
+			dev.SetKeyImage(i, txt)
+		}
+	}
+
+	updateAllKeys := func() {
+		for i := 0; i < 3; i++ {
+			updateKey(i)
+		}
+	}
+
+	updateLCD()
+	updateAllKeys()
+
+	for i := 3; i < dev.Model().Keys; i++ {
+		dev.ClearKey(i)
+	}
+
+	input := make(chan streamdeck.InputEvent, 64)
+	go func() {
+		if err := dev.ReadInput(input); err != nil {
+			fmt.Fprintf(os.Stderr, "Read error: %v\n", err)
+		}
+	}()
+
+	sig := make(chan os.Signal, 1)
+	signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM)
+
+	for {
+		select {
+		case ev := <-input:
+			if ev.Encoder != nil && ev.Encoder.Encoder < 3 {
+				i := ev.Encoder.Encoder
+				if ev.Encoder.Delta != 0 {
+					delta := ev.Encoder.Delta
+					if !fine[i] {
+						delta *= 10
+					}
+					rgb[i] = clamp(rgb[i] + delta)
+					updateLCD()
+					updateKey(i)
+					fmt.Printf("R=%d G=%d B=%d\n", rgb[0], rgb[1], rgb[2])
+				} else if ev.Encoder.Pressed {
+					fine[i] = !fine[i]
+					updateKey(i)
+				}
+			}
+		case <-sig:
+			fmt.Println()
+			return
+		}
+	}
+}