forked from toolshed/abra
30 lines
574 B
Go
30 lines
574 B
Go
package ansi
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import (
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"fmt"
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"image/color"
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)
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// colorToHexString returns a hex string representation of a color.
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func colorToHexString(c color.Color) string {
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if c == nil {
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return ""
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}
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shift := func(v uint32) uint32 {
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if v > 0xff {
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return v >> 8
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}
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return v
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}
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r, g, b, _ := c.RGBA()
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r, g, b = shift(r), shift(g), shift(b)
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return fmt.Sprintf("#%02x%02x%02x", r, g, b)
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}
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// rgbToHex converts red, green, and blue values to a hexadecimal value.
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//
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// hex := rgbToHex(0, 0, 255) // 0x0000FF
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func rgbToHex(r, g, b uint32) uint32 {
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return r<<16 + g<<8 + b
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}
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