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package main
import (
// "log"
)
// Unicorn ...
// Object representing the Unicorn HAT to be controlled
type Unicorn interface {
// Not all unicorns are the same size
GetWidth() uint8
GetHeight() uint8
// Array of pixels, indexed x, then y, then color (rgb)
GetPixels() [][][]uint8
// Set an individual pixel
SetPixel(x, y, r, g, b uint8)
// Flip the display buffer
Show()
// Set all pixels back to black
Clear()
// Turns off the LEDs
Off()
}
// GetUnicorn ...
// Get a unicorn. Tries to get you a real one,
// if it can't find one then gives you a fake one.
func GetUnicorn() (unicorn Unicorn, err error) {
unicorn, err = NewReal()
//if err != nil {
// log.Println("Couldn't get a real unicorn, trying a fake one")
// unicorn, err = NewFake(uint8(16), uint8(16))
//}
return
}
type BaseUnicorn struct {
pixels [][][]uint8
}
func (f *BaseUnicorn) GetWidth() uint8 {
return uint8(len(f.pixels))
}
func (f *BaseUnicorn) GetHeight() uint8 {
if len(f.pixels) > 0 {
return uint8(len(f.pixels[0]))
}
return 0
}
func (f *BaseUnicorn) GetPixels() [][][]uint8 {
return f.pixels
}
func (f *BaseUnicorn) SetPixel(x, y, r, g, b uint8) {
f.pixels[x][y] = []uint8{r, g, b}
}
func (f *BaseUnicorn) Clear() {
f.pixels = makePixels(f.GetWidth(), f.GetHeight())
}
func makePixels(width, height uint8) [][][]uint8 {
pixels := make([][][]uint8, width)
for x := uint8(0); x < width; x++ {
pixels[x] = make([][]uint8, height)
for y := uint8(0); y < height; y++ {
pixels[x][y] = []uint8{0, 0, 0}
}
}
return pixels
}
func rgb(pixel []uint8) (uint8, uint8, uint8) {
return pixel[0], pixel[1], pixel[2]
}
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