50 lines
1011 B
Go
50 lines
1011 B
Go
// Package postscript reads the tiger.ps file and draws it to a backend.
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package postscript
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import (
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"io/ioutil"
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"os"
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"strings"
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"github.com/llgcode/ps"
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"github.com/llgcode/draw2d"
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"github.com/llgcode/draw2d/samples"
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)
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// Main draws the tiger
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func Main(gc draw2d.GraphicContext, ext string) (string, error) {
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gc.Save()
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// flip the image
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gc.Translate(0, 200)
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gc.Scale(0.35, -0.35)
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gc.Translate(70, -200)
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// Tiger postscript drawing
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tiger := samples.Resource("image", "tiger.ps", ext)
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// Draw tiger
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Draw(gc, tiger)
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gc.Restore()
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// Return the output filename
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return samples.Output("postscript", ext), nil
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}
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// Draw a tiger
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func Draw(gc draw2d.GraphicContext, filename string) {
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// Open the postscript
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src, err := os.OpenFile(filename, 0, 0)
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if err != nil {
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panic(err)
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}
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defer src.Close()
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bytes, err := ioutil.ReadAll(src)
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reader := strings.NewReader(string(bytes))
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// Initialize and interpret the postscript
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interpreter := ps.NewInterpreter(gc)
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interpreter.Execute(reader)
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}
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