60 lines
976 B
Go
60 lines
976 B
Go
package colors
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type LightMap []Luminance
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// Hex returns all luminance value as a hex encoded string.
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func (m LightMap) Hex() (result string) {
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for _, luminance := range m {
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result += luminance.Hex()
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}
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return result
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}
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type diffValue struct {
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a []int
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b []int
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}
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var diffValues = []diffValue{
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{a: []int{4, 4, 4, 4}, b: []int{1, 3, 5, 7}},
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{a: []int{0}, b: []int{1}},
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{a: []int{0}, b: []int{3}},
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{a: []int{2}, b: []int{1}},
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{a: []int{2}, b: []int{5}},
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{a: []int{6}, b: []int{3}},
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{a: []int{6}, b: []int{7}},
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{a: []int{8}, b: []int{5}},
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{a: []int{8}, b: []int{7}},
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}
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// Diff returns an integer that can be used to find similar images.
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func (m LightMap) Diff() (result uint32) {
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if len(m) != 9 {
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return 0
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}
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result = 1
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for _, val := range diffValues {
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result = result << 1
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a := 0
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b := 0
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for _, i := range val.a {
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a += int(m[i])
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}
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for _, i := range val.b {
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b += int(m[i])
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}
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if a + 4 > b {
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result += 1
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}
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}
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return result
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}
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