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64 lines
1.1 KiB
Go
64 lines
1.1 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{
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width: width,
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height: height,
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tiles: make([]tile, width*height),
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}
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return b
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}
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func (b *buffer) setTile(x, y int, t tile) {
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n := y*b.width + x
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if n >= len(b.tiles) {
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return
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}
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b.tiles[n] = t
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}
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func (b *buffer) getTile(x, y int) tile {
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n := y*b.width + x
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if n >= len(b.tiles) {
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return tile{}
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}
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return b.tiles[n]
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}
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func (b *buffer) clear() {
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for i, _ := range b.tiles {
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b.tiles[i] = tile{}
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}
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}
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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 := b.getTile(x, y)
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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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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.setTile(x, y, tile{r: ' ', style: style})
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}
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}
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}
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func (b *buffer) bounds() math.Rect { return math.Rect{Width: b.width, Height: b.height} }
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