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41 lines
913 B
Go
41 lines
913 B
Go
package utils
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import (
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"fmt"
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"image/color"
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)
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func HexToRGBA(s string) (c color.RGBA) {
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// https://stackoverflow.com/questions/54197913/parse-hex-string-to-image-color
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c.A = 0xff
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switch len(s) {
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case 7:
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fmt.Sscanf(s, "#%02x%02x%02x", &c.R, &c.G, &c.B)
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case 4:
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fmt.Sscanf(s, "#%1x%1x%1x", &c.R, &c.G, &c.B)
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c.R *= 17
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c.G *= 17
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c.B *= 17
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}
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return
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}
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func RGBAToHex(c color.RGBA) string {
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return fmt.Sprintf("#%02X%02X%02X", c.R, c.G, c.B)
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}
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func FadeColors(color1, color2 color.RGBA, ratio float64) color.RGBA {
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if ratio < 0 {
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ratio = 0
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} else if ratio > 1 {
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ratio = 1
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}
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r := uint8(float64(color1.R)*(1-ratio) + float64(color2.R)*ratio)
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g := uint8(float64(color1.G)*(1-ratio) + float64(color2.G)*ratio)
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b := uint8(float64(color1.B)*(1-ratio) + float64(color2.B)*ratio)
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a := uint8(float64(color1.A)*(1-ratio) + float64(color2.A)*ratio)
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return color.RGBA{R: r, G: g, B: b, A: a}
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}
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