draw2d/issue23/issue23.go

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2015-04-16 09:51:13 +00:00
package main
import (
"bufio"
"fmt"
"image"
"image/draw"
"image/png"
"log"
"math"
"os"
"github.com/llgcode/draw2d/draw2d"
)
func saveToPngFile(filePath string, m image.Image) {
f, err := os.Create(filePath)
if err != nil {
log.Println(err)
os.Exit(1)
}
defer f.Close()
b := bufio.NewWriter(f)
err = png.Encode(b, m)
if err != nil {
log.Println(err)
os.Exit(1)
}
err = b.Flush()
if err != nil {
log.Println(err)
os.Exit(1)
}
fmt.Printf("Wrote %s OK.\n", filePath)
}
func main() {
file, err := os.Open("android.png")
if err != nil {
log.Fatal(err)
}
defer file.Close()
a, _, err := image.Decode(file)
//load go icon image
file2, err := os.Open("go.png")
if err != nil {
log.Fatal(err)
}
defer file2.Close()
g, _, err := image.Decode(file2)
if err != nil {
log.Fatal(err)
}
ar := a.Bounds()
w, h, x := ar.Dx(), ar.Dy(), 30.0
i := image.NewRGBA(image.Rect(0, 0, w, h))
draw.Draw(i, ar, a, ar.Min, draw.Src)
tr := draw2d.NewRotationMatrix(x * (math.Pi / 180.0))
draw2d.DrawImage(g, i, tr, draw.Over, draw2d.LinearFilter)
saveToPngFile("Test2.png", i)
}