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package main
import "fmt"
import "github.com/lucasb-eyer/go-colorful"
import "image"
import "image/draw"
import "image/png"
import "math/rand"
import "os"
import "time"
func main() {
colors := 10
blockw := 40
space := 5
rand.Seed(time.Now().UTC().UnixNano())
img := image.NewRGBA(image.Rect(0, 0, colors*blockw+space*(colors-1), 6*blockw+8*space))
warm, err := colorful.WarmPalette(colors)
if err != nil {
fmt.Printf("Error generating warm palette: %v", err)
return
}
fwarm := colorful.FastWarmPalette(colors)
happy, err := colorful.HappyPalette(colors)
if err != nil {
fmt.Printf("Error generating happy palette: %v", err)
return
}
fhappy := colorful.FastHappyPalette(colors)
soft, err := colorful.SoftPalette(colors)
if err != nil {
fmt.Printf("Error generating soft palette: %v", err)
return
}
brownies, err := colorful.SoftPaletteEx(colors, colorful.SoftPaletteSettings{isbrowny, 50, true})
if err != nil {
fmt.Printf("Error generating brownies: %v", err)
return
}
for i := 0; i < colors; i++ {
draw.Draw(img, image.Rect(i*(blockw+space), 0, i*(blockw+space)+blockw, blockw), &image.Uniform{warm[i]}, image.Point{}, draw.Src)
draw.Draw(img, image.Rect(i*(blockw+space), 1*blockw+1*space, i*(blockw+space)+blockw, 2*blockw+1*space), &image.Uniform{fwarm[i]}, image.Point{}, draw.Src)
draw.Draw(img, image.Rect(i*(blockw+space), 2*blockw+3*space, i*(blockw+space)+blockw, 3*blockw+3*space), &image.Uniform{happy[i]}, image.Point{}, draw.Src)
draw.Draw(img, image.Rect(i*(blockw+space), 3*blockw+4*space, i*(blockw+space)+blockw, 4*blockw+4*space), &image.Uniform{fhappy[i]}, image.Point{}, draw.Src)
draw.Draw(img, image.Rect(i*(blockw+space), 4*blockw+6*space, i*(blockw+space)+blockw, 5*blockw+6*space), &image.Uniform{soft[i]}, image.Point{}, draw.Src)
draw.Draw(img, image.Rect(i*(blockw+space), 5*blockw+8*space, i*(blockw+space)+blockw, 6*blockw+8*space), &image.Uniform{brownies[i]}, image.Point{}, draw.Src)
}
toimg, err := os.Create("palettegens.png")
if err != nil {
fmt.Printf("Error: %v", err)
return
}
defer toimg.Close()
png.Encode(toimg, img)
}
func isbrowny(l, a, b float64) bool {
h, c, L := colorful.LabToHcl(l, a, b)
return 10.0 < h && h < 50.0 && 0.1 < c && c < 0.5 && L < 0.5
}
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