blob: fafa1040b6834d5d784a73874c5cf4675adc7afb (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
package colors
import (
"fmt"
"math"
"strings"
)
type ColorSpace interface {
ToPrecise() PreciseColor
FromPrecise(PreciseColor) ColorSpace
}
// PreciseColor is a color with floating point values for red, green, and blue.
// The extra precision minimizes rounding errors when converting between different
// color spaces. It is used as an intermediate representation when converting between
// different color spaces.
type PreciseColor struct {
R, G, B float64
}
func (c PreciseColor) ToPrecise() PreciseColor {
return c
}
func (c PreciseColor) FromPrecise(p PreciseColor) ColorSpace {
return p
}
func ToHexString(cs ColorSpace) string {
p := cs.ToPrecise()
return strings.ToUpper(fmt.Sprintf("#%02x%02x%02x",
int(math.Round(p.R*255)),
int(math.Round(p.G*255)),
int(math.Round(p.B*255)),
))
}
|
