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package numbers
import (
"github.com/veandco/go-sdl2/sdl"
)
const width = 60
func drawDigit(surface *sdl.Surface, d int, x, y int32) error {
const (
height = 100
thickness = 10
)
white := sdl.MapRGB(surface.Format, 245, 245, 245)
switch d {
case 0:
surface.FillRect(&sdl.Rect{X: x, Y: y, W: width, H: thickness}, white)
surface.FillRect(&sdl.Rect{X: x + width - thickness, Y: y, W: thickness, H: height}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y, W: thickness, H: height}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y + height - thickness, W: width, H: thickness}, white)
case 1:
surface.FillRect(&sdl.Rect{X: x + width - thickness, Y: y, W: thickness, H: height}, white)
case 2:
surface.FillRect(&sdl.Rect{X: x, Y: y, W: width, H: thickness}, white)
surface.FillRect(&sdl.Rect{X: x + width - thickness, Y: y, W: thickness, H: height / 2}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y + height/2 - thickness/2, W: width, H: thickness}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y + height/2, W: thickness, H: height / 2}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y + height - thickness, W: width, H: thickness}, white)
case 3:
surface.FillRect(&sdl.Rect{X: x, Y: y, W: width, H: thickness}, white)
surface.FillRect(&sdl.Rect{X: x + width - thickness, Y: y, W: thickness, H: height}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y + height/2 - thickness/2, W: width, H: thickness}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y + height - thickness, W: width, H: thickness}, white)
case 4:
surface.FillRect(&sdl.Rect{X: x, Y: y, W: thickness, H: height / 2}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y + height/2 - thickness/2, W: width, H: thickness}, white)
surface.FillRect(&sdl.Rect{X: x + width - thickness, Y: y, W: thickness, H: height}, white)
case 5:
surface.FillRect(&sdl.Rect{X: x, Y: y, W: width, H: thickness}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y, W: thickness, H: height / 2}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y + height/2 - thickness/2, W: width, H: thickness}, white)
surface.FillRect(&sdl.Rect{X: x + width - thickness, Y: y + height/2, W: thickness, H: height / 2}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y + height - thickness, W: width, H: thickness}, white)
case 6:
surface.FillRect(&sdl.Rect{X: x, Y: y, W: width, H: thickness}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y, W: thickness, H: height}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y + height/2 - thickness/2, W: width, H: thickness}, white)
surface.FillRect(&sdl.Rect{X: x + width - thickness, Y: y + height/2, W: thickness, H: height / 2}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y + height - thickness, W: width, H: thickness}, white)
case 7:
surface.FillRect(&sdl.Rect{X: x, Y: y, W: width, H: thickness}, white)
surface.FillRect(&sdl.Rect{X: x + width - thickness, Y: y, W: thickness, H: height}, white)
case 8:
surface.FillRect(&sdl.Rect{X: x, Y: y, W: thickness, H: height}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y, W: width, H: thickness}, white)
surface.FillRect(&sdl.Rect{X: x + width - thickness, Y: y, W: thickness, H: height}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y + height/2 - thickness/2, W: width, H: thickness}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y + height - thickness, W: width, H: thickness}, white)
case 9:
surface.FillRect(&sdl.Rect{X: x, Y: y, W: thickness, H: height / 2}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y, W: width, H: thickness}, white)
surface.FillRect(&sdl.Rect{X: x + width - thickness, Y: y, W: thickness, H: height}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y + height/2 - thickness/2, W: width, H: thickness}, white)
surface.FillRect(&sdl.Rect{X: x, Y: y + height - thickness, W: width, H: thickness}, white)
default:
panic("invalid digit")
}
return nil
}
func Draw(surface *sdl.Surface, n int, x, y int32) error {
const padding = 20
if n == 0 {
return drawDigit(surface, 0, x, y)
}
digits := make([]int, 0, 19)
for ; n > 0; n /= 10 {
digits = append(digits, n%10)
}
for i := len(digits) - 1; i >= 0; i-- {
if err := drawDigit(surface, digits[i], x, y); err != nil {
return err
}
x += width + padding
}
return nil
}
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