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gg: optimise app.gg.show_fps() (cache ctx.text_size() results, round frame to int without interpolation, center text inside the background rectangle)

master
Delyan Angelov 2022-06-12 16:07:00 +03:00
parent 4682e17ac1
commit 139c34c07d
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GPG Key ID: 66886C0F12D595ED
1 changed files with 17 additions and 6 deletions
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23
vlib/gg/gg.c.v
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@ -511,10 +511,17 @@ pub fn (ctx &Context) end() {
}
pub struct FPSConfig {
pub mut:
x int
y int
width int
height int
show bool // do not show by default, use `-d show_fps` or set it manually in your app to override with: `app.gg.fps.show = true`
text_config gx.TextCfg = gx.TextCfg{
color: gx.yellow
size: 20
align: .center
vertical_align: .middle
}
background_color gx.Color = gx.Color{
r: 0
@ -522,22 +529,26 @@ pub struct FPSConfig {
b: 0
a: 128
}
show bool // do not show by default, use `-d show_fps` or set it manually in your app to override with: `app.gg.fps.show = true`
}
pub fn (ctx &Context) show_fps() {
if !ctx.font_inited {
return
}
frame_duration := sapp.frame_duration()
sgl.defaults()
sgl.matrix_mode_projection()
sgl.ortho(0.0, f32(sapp.width()), f32(sapp.height()), 0.0, -1.0, 1.0)
frame_duration := sapp.frame_duration()
fps_text := '${1 / frame_duration:2.0f}'
ctx.set_cfg(ctx.fps.text_config)
fps_width, fps_height := ctx.text_size('00') // maximum size; prevents blinking on variable width fonts
ctx.draw_rect_filled(ctx.fps.x, ctx.fps.y, fps_width + 5, fps_height + 7, ctx.fps.background_color)
ctx.draw_text(ctx.fps.x + 2, ctx.fps.y + 1, fps_text, ctx.fps.text_config)
if ctx.fps.width == 0 {
mut fps := unsafe { &ctx.fps }
fps.width, fps.height = ctx.text_size('00') // maximum size; prevents blinking on variable width fonts
}
fps_text := int(0.5 + 1.0 / frame_duration).str()
ctx.draw_rect_filled(ctx.fps.x, ctx.fps.y, ctx.fps.width + 2, ctx.fps.height + 4,
ctx.fps.background_color)
ctx.draw_text(ctx.fps.x + ctx.fps.width / 2 + 1, ctx.fps.y + ctx.fps.height / 2 + 2,
fps_text, ctx.fps.text_config)
}
fn (mut ctx Context) set_scale() {