57 lines
1012 B
Go
57 lines
1012 B
Go
package play
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import (
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"fmt"
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"time"
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"opslag.de/schobers/geom"
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"opslag.de/schobers/zntg"
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"opslag.de/schobers/zntg/ui"
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)
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type FPS struct {
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ui.ControlBase
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update zntg.Animation
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i int
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frames []int
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total int
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}
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func (f *FPS) Shown() {
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f.update.Interval = 20 * time.Millisecond
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f.update.Start()
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f.i = 0
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f.frames = make([]int, 51)
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f.total = 0
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}
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func (f *FPS) Hidden() {
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f.update.Pause()
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}
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func (f *FPS) font(ctx ui.Context) ui.Font {
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font := ctx.Fonts().Font("debug")
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if font != nil {
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return font
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}
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return ctx.Fonts().Font("default")
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}
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func (f *FPS) Render(ctx ui.Context) {
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_, n := f.update.AnimateDelta()
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for i := 0; i < n; i++ {
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f.total += f.frames[f.i]
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f.i = (f.i + 1) % len(f.frames)
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f.total -= f.frames[f.i]
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f.frames[f.i] = 0
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}
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f.frames[f.i]++
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font := f.font(ctx)
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fps := fmt.Sprintf("FPS: %d", f.total)
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ctx.Renderer().Text(font, geom.PtF32(5, 5), ctx.Style().Palette.Background, fps)
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ctx.Renderer().Text(font, geom.PtF32(4, 4), ctx.Style().Palette.Text, fps)
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}
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