1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156

// Copyright 2018 The Druid Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use std::any::Any;

use time::Instant;

use piet_common::kurbo::{Line, Size};
use piet_common::{Color, FontFamily, Piet, RenderContext, Text, TextLayoutBuilder};

use druid_shell::{Application, KeyEvent, Region, WinHandler, WindowBuilder, WindowHandle};

const BG_COLOR: Color = Color::rgb8(0x27, 0x28, 0x22);
const FG_COLOR: Color = Color::rgb8(0xf0, 0xf0, 0xea);
const RED: Color = Color::rgb8(0xff, 0x80, 0x80);
const CYAN: Color = Color::rgb8(0x80, 0xff, 0xff);

struct PerfTest {
    handle: WindowHandle,
    size: Size,
    start_time: Instant,
    last_time: Instant,
    red: bool,
}

impl WinHandler for PerfTest {
    fn connect(&mut self, handle: &WindowHandle) {
        self.handle = handle.clone();
    }

    fn prepare_paint(&mut self) {
        self.handle.invalidate();
    }

    fn paint(&mut self, piet: &mut Piet, _: &Region) {
        let rect = self.size.to_rect();
        piet.fill(rect, &BG_COLOR);

        piet.stroke(
            Line::new((0.0, self.size.height), (self.size.width, 0.0)),
            &FG_COLOR,
            1.0,
        );

        let current_ns = (Instant::now() - self.start_time).whole_nanoseconds();
        let th = ::std::f64::consts::PI * (current_ns as f64) * 2e-9;
        let dx = 100.0 * th.sin();
        let dy = 100.0 * th.cos();
        piet.stroke(
            Line::new((100.0, 100.0), (100.0 + dx, 100.0 - dy)),
            &FG_COLOR,
            1.0,
        );

        let now = Instant::now();
        let msg = format!("{}ms", (now - self.last_time).whole_milliseconds());
        self.last_time = now;
        let layout = piet
            .text()
            .new_text_layout(msg)
            .font(FontFamily::MONOSPACE, 15.0)
            .text_color(FG_COLOR)
            .build()
            .unwrap();
        piet.draw_text(&layout, (10.0, 210.0));

        let msg = "VSYNC";
        let color = if self.red { RED } else { CYAN };

        let layout = piet
            .text()
            .new_text_layout(msg)
            .text_color(color)
            .font(FontFamily::MONOSPACE, 48.0)
            .build()
            .unwrap();
        piet.draw_text(&layout, (10.0, 280.0));
        self.red = !self.red;

        let msg = "Hello DWrite! This is a somewhat longer string of text intended to provoke slightly longer draw times.";
        let layout = piet
            .text()
            .new_text_layout(msg)
            .font(FontFamily::MONOSPACE, 15.0)
            .text_color(FG_COLOR)
            .build()
            .unwrap();
        let dy = 15.0;
        let x0 = 210.0;
        let y0 = 10.0;
        for i in 0..60 {
            let y = y0 + (i as f64) * dy;
            piet.draw_text(&layout, (x0, y));
        }
        self.handle.request_anim_frame();
    }

    fn command(&mut self, id: u32) {
        match id {
            0x100 => self.handle.close(),
            _ => println!("unexpected id {}", id),
        }
    }

    fn key_down(&mut self, event: KeyEvent) -> bool {
        println!("keydown: {:?}", event);
        false
    }

    fn size(&mut self, size: Size) {
        self.size = size;
    }

    fn request_close(&mut self) {
        self.handle.close();
    }

    fn destroy(&mut self) {
        Application::global().quit()
    }

    fn as_any(&mut self) -> &mut dyn Any {
        self
    }
}

fn main() {
    tracing_subscriber::fmt().init();
    let app = Application::new().unwrap();
    let mut builder = WindowBuilder::new(app.clone());
    let perf_test = PerfTest {
        size: Size::ZERO,
        handle: Default::default(),
        start_time: time::Instant::now(),
        last_time: time::Instant::now(),
        red: true,
    };
    builder.set_handler(Box::new(perf_test));
    builder.set_title("Performance tester");

    let window = builder.build().unwrap();
    window.show();

    app.run(None);
}