2012-08-01 08:13:46 -07:00
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package pic
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import (
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"bytes"
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"image"
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"image/png"
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"log"
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"os"
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)
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func CalculateImage(f func(int, int) [][]uint8) image.Image {
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const (
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dx = 256
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2012-08-02 14:04:07 -07:00
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dy = 1024
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2012-08-01 08:13:46 -07:00
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)
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data := f(dx, dy)
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m := image.NewNRGBA(image.Rect(0, 0, dx, dy))
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for y := 0; y < dy; y++ {
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for x := 0; x < dx; x++ {
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v := data[y][x]
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i := y*m.Stride + x*4
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m.Pix[i] = v
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m.Pix[i+1] = v
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m.Pix[i+2] = 255
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m.Pix[i+3] = 255
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}
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}
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return m
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}
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func SaveImage(filename string, m image.Image) {
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var buf bytes.Buffer
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png.Encode(&buf, m)
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if outfile, err := os.Create(filename); err != nil {
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log.Fatal(err)
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} else {
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buf.WriteTo(outfile)
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}
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}
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