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66 lines
1.2 KiB
Go
66 lines
1.2 KiB
Go
package app
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import (
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"github.com/gdamore/tcell/v2"
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"github.com/jordanorelli/astro-domu/internal/math"
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)
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// buffer is a rect of tiles
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type buffer struct {
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width int
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height int
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tiles []tile
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}
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func newBuffer(width, height int) *buffer {
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b := &buffer{width: width, height: height}
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b.clear()
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return b
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}
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func (b *buffer) set(x, y int, t tile) bool {
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n := y*b.width + x
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if n >= len(b.tiles) {
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return false
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}
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b.tiles[n] = t
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return true
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}
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func (b *buffer) get(x, y int) (tile, bool) {
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n := y*b.width + x
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if n >= len(b.tiles) {
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return tile{}, false
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}
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return b.tiles[n], true
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}
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func (b *buffer) writeString(s string, start math.Vec, style tcell.Style) {
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for i, r := range []rune(s) {
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if !b.set(start.X+i, start.Y, tile{r: r, style: style}) {
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break
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}
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}
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}
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func (b *buffer) clear() { b.tiles = make([]tile, b.width*b.height) }
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func (b *buffer) blit(s tcell.Screen, offset math.Vec) {
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for x := 0; x < b.width; x++ {
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for y := 0; y < b.height; y++ {
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t, ok := b.get(x, y)
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if ok {
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s.SetContent(x+offset.X, y+offset.Y, t.r, nil, t.style)
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}
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}
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}
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}
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func (b *buffer) fill(style tcell.Style) {
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for x := 0; x < b.width; x++ {
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for y := 0; y < b.height; y++ {
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b.set(x, y, tile{r: ' ', style: style})
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}
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}
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}
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