Sync

tour_of_go/l5/3

@@ -1,12 +0,0 @@
-package main
-
-import "fmt"
-
-func main() {
-	var i interface{} = "hello"
-
-	s := i.(string)
-	fmt.Println(s)
-
-	fmt.Printf("%v- %T\n", s, s)
-}

tour_of_go/l5/exercise-images/exercise-images.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"golang.org/x/tour/pic"
+	"image"
+	"image/color"
+)
+
+type Image struct{
+	w, h int
+}
+
+func (i Image) Bounds() image.Rectangle {
+	return image.Rect(0, 0, i.w, i.h)
+}
+
+func (i Image) ColorModel() color.Model {
+	return color.RGBAModel
+}
+
+func (i Image) At(x, y int) color.Color {
+	v := uint8(x^y)
+	return color.RGBA{v, v, 255, 255}
+}
+
+func main() {
+	m := Image{320, 240}
+	pic.ShowImage(m)
+}

tour_of_go/l5/exercise-images/go.mod

@@ -0,0 +1,5 @@
+module exercise-images.go
+
+go 1.24.5
+
+require golang.org/x/tour v0.1.0

tour_of_go/l5/exercise-images/go.sum

@@ -0,0 +1,2 @@
+golang.org/x/tour v0.1.0 h1:OWzbINRoGf1wwBhKdFDpYwM88NM0d1SL/Nj6PagS6YE=
+golang.org/x/tour v0.1.0/go.mod h1:DUZC6G8mR1AXgXy73r8qt/G5RsefKIlSj6jBMc8b9Wc=

tour_of_go/l5/images.go

@@ -0,0 +1,12 @@
+package main
+
+import (
+	"fmt"
+	"image"
+)
+
+func main() {
+	m := image.NewRGBA(image.Rect(0, 0, 100, 100))
+	fmt.Println(m.Bounds())
+	fmt.Println(m.At(0, 0).RGBA())
+}