screen: update tresholds on text

app.go

@@ -0,0 +1,61 @@
+package goadb
+
+import (
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+// Get the current focussed app package name
+func (d *Device) GetCurrentAppPackage() (string, error) {
+	data, err := d.RunCommand("shell dumpsys activity activities | grep ResumedActivity")
+	re := regexp.MustCompile(`\b([a-zA-Z0-9._]+)/(?:[a-zA-Z0-9._]+)\b`)
+	matches := re.FindStringSubmatch(string(data))
+
+	if len(matches) > 1 {
+		return matches[1], nil
+	} else {
+		return "", nil
+	}
+	return "", err
+}
+
+// Get the pid for a app
+func (d *Device) GetAppPid(appackage string) (int, error) {
+	data, err := d.RunCommand(fmt.Sprintf("shell pidof %s"))
+	if err != nil {
+		return -1, err
+	}
+
+	pid, err := strconv.Atoi(strings.TrimSpace(string(data)))
+	if err != nil {
+		return -1, err
+	}
+
+	return pid, nil
+}
+
+// Check if a app is running
+func (d *Device) CheckAppRunning(appackage string) (bool, error) {
+	pid, err := d.GetAppPid(appackage)
+	if err != nil {
+		return false, err
+	}
+	if pid != -1 {
+		return true, nil
+	}
+	return false, nil
+}
+
+// Start a app using the package name
+func (d *Device) StartApp(appackage string) error {
+	_, err := d.RunCommand(fmt.Sprintf("shell monkey -p %s -c android.intent.category.LAUNCHER 1", appackage))
+	return err
+}
+
+// Force kill a running app
+func (d *Device) KillApp(appackage string) error {
+	_, err := d.RunCommand(fmt.Sprintf("shell am force-stop %s", appackage))
+	return err
+}

device.go

@@ -0,0 +1,30 @@
+package goadb
+
+import (
+	"fmt"
+	"log"
+	"strings"
+
+)
+
+// IsConnected checks if the device is currently connected via ADB
+func (d *Device) IsConnected() bool {
+	output, err := ExecuteCommand("devices")
+	if err != nil {
+		log.Println(fmt.Errorf("Failed to determine device status: %w", err))
+		return false
+	}
+	lines := strings.Split(string(output), "\n")
+	for _, line := range lines {
+		if strings.HasPrefix(line, d.Serial) && strings.Contains(line, "device") {
+			return true
+		}
+	}
+	return false
+}
+
+// Run a command on this specific device
+func (d *Device) RunCommand(command string) ([]byte, error) {
+	return ExecuteCommand(fmt.Sprintf("-s %s %s", d.Serial, command))
+}
+

go.mod

@@ -1,3 +1,5 @@
 module git.plabble.org/misthios/goadb
 
 go 1.24.6
+
+require github.com/otiai10/gosseract/v2 v2.4.1

screen.go

@@ -0,0 +1,155 @@
+package goadb
+
+import (
+	"bytes"
+	"fmt"
+	"image"
+	"image/color"
+	"image/png"
+	"strconv"
+	"strings"
+
+	"github.com/otiai10/gosseract/v2"
+)
+
+// Get the state of the screen (Asleep/Awake)
+func (d *Device) GetScreenState() (string, error) {
+	data, err := d.RunCommand("shell dumpsys power | grep mWakefulness | head -n1")
+	if err != nil {
+		return "", err
+	}
+	state := strings.Split(string(data), "=")[1]
+	return state, err
+}
+
+// Toggle the screen by simulating a press of the power button
+func (d *Device) ToggleScreen() error {
+	_, err := d.RunCommand("shell input keyevent 26")
+	return err
+}
+
+// Tap on a location on the screen
+func (d *Device) TapScreen(x int, y int) error {
+	_, err := d.RunCommand(fmt.Sprintf("shell input tap %d %d", x, y))
+	return err
+}
+
+// Get the resolution of the screen
+func (d *Device) GetScreenResolution() (int, int, error) {
+
+	//Not yet set on the device so use adb to retrieve it
+	if d.Screenx == 0 || d.Screeny == 0 {
+
+		data, err := d.RunCommand("shell wm size")
+		res := strings.Split(string(data), ":")[1]
+		dimensions := strings.Split(res, "x")
+
+		if len(dimensions) != 2 {
+			return -1, -1, fmt.Errorf("invalid dimensions for screen")
+		}
+
+		x, err := strconv.Atoi(strings.TrimSpace(dimensions[0]))
+		if err != nil {
+			return -1, -1, err
+		}
+
+		y, err := strconv.Atoi(strings.TrimSpace(dimensions[1]))
+		if err != nil {
+			return -1, -1, err
+		}
+
+		d.Screenx = x
+		d.Screeny = y
+
+		return x, y, err
+	}
+
+	return d.Screenx, d.Screeny, nil
+}
+
+func (d *Device) GetScreenText(xStart int, xEnd int, yStart int, yEnd int, whitelist string, multiline bool, textPolarity string) (string, error) {
+	data, err := d.RunCommand("exec-out screencap -p")
+	if err != nil {
+		return "", fmt.Errorf("failed to take screenshot: %w", err)
+	}
+
+	img, err := png.Decode(bytes.NewReader(data))
+	if err != nil {
+		return "", fmt.Errorf("failed to decode PNG: %w", err)
+	}
+
+	rect := image.Rect(0, 0, xEnd-xStart, yEnd-yStart)
+	cropped := image.NewRGBA(rect)
+	for y := yStart; y < yEnd; y++ {
+		for x := xStart; x < xEnd; x++ {
+			cropped.Set(x-xStart, y-yStart, img.At(x, y))
+		}
+	}
+
+	// Convert to grayscale and compute average brightness
+	gray := image.NewGray(rect)
+	var totalBrightness int
+	for y := 0; y < rect.Dy(); y++ {
+		for x := 0; x < rect.Dx(); x++ {
+			grayVal := color.GrayModel.Convert(cropped.At(x, y)).(color.Gray)
+			gray.Set(x, y, grayVal)
+			totalBrightness += int(grayVal.Y)
+		}
+	}
+	avgBrightness := totalBrightness / (rect.Dx() * rect.Dy())
+
+	// Decide polarity
+	useLightText := false
+	switch textPolarity {
+	case "light":
+		useLightText = true
+	case "dark":
+		useLightText = false
+	case "auto":
+		useLightText = avgBrightness < 128
+	default:
+		return "", fmt.Errorf("invalid textPolarity: must be 'dark', 'light', or 'auto'")
+	}
+
+	// Binarize based on polarity
+	binarized := image.NewGray(rect)
+	for y := 0; y < rect.Dy(); y++ {
+		for x := 0; x < rect.Dx(); x++ {
+			grayVal := gray.GrayAt(x, y).Y
+			if useLightText {
+				if int(grayVal) > avgBrightness+10 {
+					binarized.SetGray(x, y, color.Gray{Y: 0})
+				} else {
+					binarized.SetGray(x, y, color.Gray{Y: 255})
+				}
+			} else {
+				if int(grayVal) < avgBrightness-10 {
+					binarized.SetGray(x, y, color.Gray{Y: 0})
+				} else {
+					binarized.SetGray(x, y, color.Gray{Y: 255})
+				}
+			}
+		}
+	}
+
+	var buf bytes.Buffer
+	if err := png.Encode(&buf, binarized); err != nil {
+		return "", fmt.Errorf("failed to encode image: %w", err)
+	}
+
+	client := gosseract.NewClient()
+	defer client.Close()
+	client.SetImageFromBytes(buf.Bytes())
+	client.SetWhitelist(whitelist)
+	if multiline {
+		client.SetPageSegMode(gosseract.PSM_AUTO)
+	} else {
+		client.SetPageSegMode(gosseract.PSM_SINGLE_BLOCK)
+	}
+
+	text, err := client.Text()
+	if err != nil {
+		return "", fmt.Errorf("tesseract error: %w", err)
+	}
+	return text, nil
+}

types.go

@@ -2,4 +2,6 @@ package goadb
 
 type Device struct {
     Serial string
+    Screenx int
+    Screeny int
 }