display-test/components/components.go

package components

import "io"

// Some general types

// Rectangle and its' suplements
type rect struct {
	x int
	y int
	w int
	h int
}

type RectGetter interface {
	GetPos() (int, int)
	GetSize() (int, int)
}

type RectSetter interface {
	SetPos(x, y int)
	SetSize(w, h int)
}

// Mask

// Implementation dependent !!!
// Now for mt12232
type mask struct {
	bits uint32
}

func (m *mask) Update(r rect) {
	m.bits = 0
	y0 := min(3, max(0, int(r.y/8)))
	y1 := min(3, max(0, int((r.y+r.h-1)/8)))

	x0 := min(1, max(0, int(r.x/61)))
	x1 := min(1, max(0, int((r.x+r.w-1)/61)))

	//log.Println(x0, y0, x1, y1)
	for y := y0; y <= y1; y++ {
		for x := x0; x <= x1; x++ {
			m.bits |= (1 << (x*4 + y))
		}
	}
}

// Component - all components should implement this interface

type Component interface {
	RectGetter

	Draw() // Draw and flush

	io.Closer
}