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gg: UI mode for much lower CPU usage in UI apps

pull/6892/head
Alexander Medvednikov 2020-11-20 14:50:06 +01:00
parent 3c4b87bfec
commit 30ddb89e3c
1 changed files with 33 additions and 14 deletions
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47
vlib/gg/gg.v
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@ -57,25 +57,29 @@ pub:
// vid needs this // vid needs this
// init_text bool // init_text bool
font_path string font_path string
ui_mode bool
} }
pub struct Context { pub struct Context {
render_text bool render_text bool
mut: mut:
// a cache with all images created by the user. used for sokol image init and to save space // a cache with all images created by the user. used for sokol image init and to save space
// (so that the user can store image ids, not entire Image objects) // (so that the user can store image ids, not entire Image objects)
image_cache []Image image_cache []Image
needs_refresh bool = true
ticks int
pub mut: pub mut:
scale f32 = 1.0 scale f32 = 1.0
// will get set to 2.0 for retina, will remain 1.0 for normal // will get set to 2.0 for retina, will remain 1.0 for normal
width int width int
height int height int
clear_pass C.sg_pass_action clear_pass C.sg_pass_action
window C.sapp_desc window C.sapp_desc
timage_pip C.sgl_pipeline timage_pip C.sgl_pipeline
config Config config Config
ft &FT ft &FT
font_inited bool font_inited bool
ui_mode bool // do not redraw everything 60 times/second, but only when the user requests
} }
pub struct Size { pub struct Size {
@ -143,10 +147,24 @@ fn gg_init_sokol_window(user_data voidptr) {
} }
fn gg_frame_fn(user_data voidptr) { fn gg_frame_fn(user_data voidptr) {
mut g := &Context(user_data) mut ctx := &Context(user_data)
if g.config.frame_fn != voidptr(0) { if ctx.config.frame_fn == voidptr(0) {
g.config.frame_fn(g.config.user_data) return
} }
if ctx.ui_mode && !ctx.needs_refresh {
// Draw 3 more frames after the "stop refresh" command
ctx.ticks++
if ctx.ticks > 3 {
return
}
}
ctx.config.frame_fn(ctx.config.user_data)
ctx.needs_refresh = false
}
pub fn (mut ctx Context) refresh_ui() {
ctx.needs_refresh = true
ctx.ticks = 0
} }
fn gg_event_fn(ce &C.sapp_event, user_data voidptr) { fn gg_event_fn(ce &C.sapp_event, user_data voidptr) {
@ -209,6 +227,7 @@ pub fn new_context(cfg Config) &Context {
config: cfg config: cfg
render_text: cfg.font_path != '' render_text: cfg.font_path != ''
ft: 0 ft: 0
ui_mode: cfg.ui_mode
} }
g.set_bg_color(cfg.bg_color) g.set_bg_color(cfg.bg_color)
// C.printf('new_context() %p\n', cfg.user_data) // C.printf('new_context() %p\n', cfg.user_data)