draw2d/cmd/testpostscript.go

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package main
import (
"fmt"
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"time"
"log"
"os"
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"io/ioutil"
"bufio"
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"strings"
"image"
"image/png"
"draw2d.googlecode.com/hg/draw2d"
"draw2d.googlecode.com/hg/postscript"
)
func saveToPngFile(filePath string, m image.Image) {
f, err := os.Open(filePath, os.O_CREAT|os.O_WRONLY, 0600)
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() {
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i := image.NewRGBA(600, 800)
gc := draw2d.NewImageGraphicContext(i)
gc.Translate(0, 380)
gc.Scale(1, -1)
gc.Translate(0, -380)
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lastTime := time.Nanoseconds()
src, err := os.Open("../resource/postscript/Mand.ps", 0, 0)
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if err != nil {
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return
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}
defer src.Close()
bytes, err := ioutil.ReadAll(src)
reader := strings.NewReader(string(bytes))
interpreter := postscript.NewInterpreter(gc)
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interpreter.Execute(reader)
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dt := time.Nanoseconds() - lastTime
fmt.Printf("Draw image: %f ms\n", float64(dt)*1e-6)
saveToPngFile("../resource/result/TestPostscript.png", i)
}