Sander Schobers
cd5ca3f04f
Separated some image related methods. Added feedback for simulation speed (colored buttons).
32 lines
646 B
Go
32 lines
646 B
Go
package main
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import (
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"image"
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"image/color"
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"opslag.de/schobers/tins2020/img"
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)
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func convertToGray(path string) error {
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src, err := img.DecodeImage(path)
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if err != nil {
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return err
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}
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bounds := src.Bounds()
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dst := image.NewRGBA(bounds)
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for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
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for x := bounds.Min.X; x < bounds.Max.X; x++ {
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c := src.At(x, y)
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rgba := color.NRGBAModel.Convert(c).(color.NRGBA)
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if rgba.A > 0 {
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gray := color.GrayModel.Convert(c).(color.Gray)
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rgba.R, rgba.G, rgba.B = gray.Y, gray.Y, gray.Y
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dst.Set(x, y, rgba)
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} else {
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dst.Set(x, y, c)
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}
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}
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}
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return img.EncodePNG(path, dst)
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}
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