ZacharyZhang-NY
51af14709d
A terminal with history, a Go-colored code block, a log viewer that follows, a hex viewer, a memory map, a JSON tree, a line diff, a GAME OVER crash screen, an FPS meter, profiler bars, breakpoints, variables, command history, a shortcut list, a debug grid, a pixel editor that exports string art, a palette editor, a sprite sheet, a glyph map and a 6502 register view. layout.ScrollArea takes Follow, and ChatLog now uses it. data.TreeNode takes a Value drawn in its Slot. pixel gains Has, and Sprite.Art writes MustSprite art. pixel.Editor takes the caller's value at each input event, so a value changed between frames is never typed onto.
73 lines
1.9 KiB
Go
73 lines
1.9 KiB
Go
package code
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import (
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"fmt"
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"slices"
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"time"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
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)
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type FPSMeterOptions struct {
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// Width and Height are dots; zeros mean 120 by 40.
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Width, Height int
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}
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// FPSMeter draws frame times as bars, newest right, with percentiles.
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func FPSMeter(c *ui.Context, text string, frames []time.Duration, o FPSMeterOptions) *ui.Element {
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k := pixel.K(c)
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w, h := pixel.Or("FPSMeter Width", o.Width, 120), pixel.Or("FPSMeter Height", o.Height, 40)
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for _, f := range frames {
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if f < 0 {
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panic(fmt.Sprintf("code: FPSMeter frame of %v", f))
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}
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}
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// Two dots a bar; the oldest scroll off the left.
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shown := frames[max(0, len(frames)-(w-4)/2):]
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p50, p95 := percentile(shown, 50), percentile(shown, 95)
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head := "P50 - P95 -"
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if len(shown) > 0 {
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head = fmt.Sprintf("P50 %.1fMS P95 %.1fMS", ms(p50), ms(p95))
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}
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top := 2 * time.Second / 60
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if len(shown) > 0 {
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top = max(top, slices.Max(shown))
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}
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return ui.Box(c).Size(k.D(w), k.D(h+8)).Role(ui.RoleImage).Label(text).Description(head).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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body, ink, _ := dark(k)
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g.Micro(0, 0, head, pixel.Faint, 1)
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g.Rect(0, 8, w, h, body)
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y := func(d time.Duration) int { return 8 + h - 2 - int(int64(h-4)*int64(d)/int64(top)) }
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for i, f := range shown {
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slot := pixel.Good
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switch {
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case f > time.Second/30:
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slot = pixel.Bad
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case f > time.Second/60:
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slot = pixel.Warn
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}
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g.Rect(2+2*i, y(f), 1, 8+h-2-y(f), slot)
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}
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if len(shown) > 0 {
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for x := 2; x < w-2; x += 2 {
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g.Dot(x, y(p50), ink)
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g.Dot(x+1, y(p95), pixel.Warn)
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}
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}
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})
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}
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// percentile is the nearest-rank q of ds; empty is 0.
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func percentile(ds []time.Duration, q int) time.Duration {
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if len(ds) == 0 {
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return 0
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}
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s := slices.Sorted(slices.Values(ds))
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return s[max(0, (q*len(s)+99)/100-1)]
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}
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func ms(d time.Duration) float64 { return float64(d) / float64(time.Millisecond) }
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