forked from MTSR/mapserver
46 lines
805 B
Go
46 lines
805 B
Go
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package colormapping
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import (
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"bytes"
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"image/color"
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"image/png"
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)
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type Palette struct {
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colors map[int]*color.RGBA
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}
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func NewPalette(imagefile []byte) (*Palette, error) {
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palette := &Palette{
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colors: make(map[int]*color.RGBA),
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}
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reader := bytes.NewReader(imagefile)
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img, err := png.Decode(reader)
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if err != nil {
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return nil, err
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}
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bounds := img.Bounds()
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index := 0
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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 := img.At(x, y)
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r, g, b, a := c.RGBA()
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//fmt.Println("x ", x, " y ", y, " Index: ", index, " Color ", c)
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palette.colors[index] = &color.RGBA{uint8(r), uint8(g), uint8(b), uint8(a)}
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index++
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}
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}
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return palette, nil
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}
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func (m *Palette) GetColor(param2 int) *color.RGBA {
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return m.colors[param2]
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}
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