Add Android client support and unify cross-platform builds

pkg/utils/screenshot_desktop.go

@@ -1,3 +1,5 @@
+//go:build windows || linux || darwin
+
 package utils
 
 import (
@@ -9,34 +11,27 @@ import (
 	"github.com/kbinani/screenshot"
 )
 
-// CaptureScreenshot 捕获主屏幕截图
-// quality: JPEG 质量 (1-100), 0 使用默认值 (75)
-// 返回: JPEG 图片数据, 宽度, 高度, 错误
+// CaptureScreenshot captures the primary display.
 func CaptureScreenshot(quality int) ([]byte, int, int, error) {
-	// 默认质量
 	if quality <= 0 || quality > 100 {
 		quality = 75
 	}
 
-	// 获取活动显示器数量
 	n := screenshot.NumActiveDisplays()
 	if n == 0 {
 		return nil, 0, 0, fmt.Errorf("no active display found")
 	}
 
-	// 获取主显示器边界
 	bounds := screenshot.GetDisplayBounds(0)
 	if bounds.Empty() {
 		return nil, 0, 0, fmt.Errorf("failed to get display bounds")
 	}
 
-	// 捕获屏幕
 	img, err := screenshot.CaptureRect(bounds)
 	if err != nil {
 		return nil, 0, 0, fmt.Errorf("capture screen: %w", err)
 	}
 
-	// 编码为 JPEG
 	var buf bytes.Buffer
 	opts := &jpeg.Options{Quality: quality}
 	if err := jpeg.Encode(&buf, img, opts); err != nil {
@@ -46,40 +41,30 @@ func CaptureScreenshot(quality int) ([]byte, int, int, error) {
 	return buf.Bytes(), bounds.Dx(), bounds.Dy(), nil
 }
 
-// CaptureAllScreens 捕获所有屏幕并拼接
-// quality: JPEG 质量 (1-100), 0 使用默认值 (75)
-// 返回: JPEG 图片数据, 宽度, 高度, 错误
+// CaptureAllScreens captures all active displays and stitches them together.
 func CaptureAllScreens(quality int) ([]byte, int, int, error) {
-	// 默认质量
 	if quality <= 0 || quality > 100 {
 		quality = 75
 	}
 
-	// 获取活动显示器数量
 	n := screenshot.NumActiveDisplays()
 	if n == 0 {
 		return nil, 0, 0, fmt.Errorf("no active display found")
 	}
 
-	// 计算所有屏幕的总边界
 	var totalBounds image.Rectangle
 	for i := 0; i < n; i++ {
 		bounds := screenshot.GetDisplayBounds(i)
 		totalBounds = totalBounds.Union(bounds)
 	}
 
-	// 创建总画布
 	totalImg := image.NewRGBA(totalBounds)
-
-	// 捕获每个屏幕并绘制到总画布
 	for i := 0; i < n; i++ {
 		bounds := screenshot.GetDisplayBounds(i)
 		img, err := screenshot.CaptureRect(bounds)
 		if err != nil {
-			continue // 跳过失败的屏幕
+			continue
 		}
-
-		// 绘制到总画布
 		for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
 			for x := bounds.Min.X; x < bounds.Max.X; x++ {
 				totalImg.Set(x, y, img.At(x-bounds.Min.X, y-bounds.Min.Y))
@@ -87,7 +72,6 @@ func CaptureAllScreens(quality int) ([]byte, int, int, error) {
 		}
 	}
 
-	// 编码为 JPEG
 	var buf bytes.Buffer
 	opts := &jpeg.Options{Quality: quality}
 	if err := jpeg.Encode(&buf, totalImg, opts); err != nil {

pkg/utils/screenshot_stub.go

@@ -0,0 +1,15 @@
+//go:build !windows && !linux && !darwin
+
+package utils
+
+import "fmt"
+
+// CaptureScreenshot is not available on this platform.
+func CaptureScreenshot(quality int) ([]byte, int, int, error) {
+	return nil, 0, 0, fmt.Errorf("screenshot not supported on this platform")
+}
+
+// CaptureAllScreens is not available on this platform.
+func CaptureAllScreens(quality int) ([]byte, int, int, error) {
+	return nil, 0, 0, fmt.Errorf("screenshot not supported on this platform")
+}