func getPixelBytes(img image.NRGBA, pixel LsbPixel) byte {
rgba := img.NRGBAAt(pixel.GetX(), pixel.GetY())
switch pixel.GetLayer() {
case "r":
return rgba.R
case "g":
return rgba.G
case "b":
return rgba.B
case "a":
return rgba.A
}
return 0
}
func setPixelBytes(img image.NRGBA, pixel LsbPixel, byt byte) {
rgba := img.NRGBAAt(pixel.GetX(), pixel.GetY())
switch pixel.GetLayer() {
case "r":
rgba.R = byt
case "g":
rgba.G = byt
case "b":
rgba.B = byt
case "a":
rgba.A = byt
}
img.Set(pixel.GetX(), pixel.GetY(), rgba)
}
// Takes an average of the biome colors of the surrounding area
func calculateBiome(bs *blocksSnapshot, x, z int, img *image.NRGBA) (byte, byte, byte) {
count := 0
var r, g, b int
for xx := -2; xx <= 2; xx++ {
for zz := -2; zz <= 2; zz++ {
biome := bs.biome(x+xx, z+zz)
ix := biome.ColorIndex & 0xFF
iy := biome.ColorIndex >> 8
col := img.NRGBAAt(ix, iy)
r += int(col.R)
g += int(col.G)
b += int(col.B)
count++
}
}
return byte(r / count), byte(g / count), byte(b / count)
}