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
|
use crate::{Backend, Color, Error, Renderer, Settings, Viewport};
use core::ffi::c_void;
use glow::HasContext;
use iced_graphics::{Antialiasing, Size};
/// A window graphics backend for iced powered by `glow`.
#[allow(missing_debug_implementations)]
pub struct Compositor {
gl: glow::Context,
}
impl iced_graphics::window::GLCompositor for Compositor {
type Settings = Settings;
type Renderer = Renderer;
unsafe fn new(
settings: Self::Settings,
loader_function: impl FnMut(&str) -> *const c_void,
) -> Result<(Self, Self::Renderer), Error> {
let gl = glow::Context::from_loader_function(loader_function);
let version = gl.version();
log::info!("Version: {:?}", version);
log::info!("Embedded: {}", version.is_embedded);
let renderer = gl.get_parameter_string(glow::RENDERER);
log::info!("Renderer: {}", renderer);
// Enable auto-conversion from/to sRGB
gl.enable(glow::FRAMEBUFFER_SRGB);
// Enable alpha blending
gl.enable(glow::BLEND);
gl.blend_func_separate(
glow::SRC_ALPHA,
glow::ONE_MINUS_SRC_ALPHA,
glow::ONE,
glow::ONE_MINUS_SRC_ALPHA,
);
// Disable multisampling by default
gl.disable(glow::MULTISAMPLE);
let renderer = Renderer::new(Backend::new(&gl, settings));
Ok((Self { gl }, renderer))
}
fn sample_count(settings: &Settings) -> u32 {
settings
.antialiasing
.map(Antialiasing::sample_count)
.unwrap_or(0)
}
fn resize_viewport(&mut self, physical_size: Size<u32>) {
unsafe {
self.gl.viewport(
0,
0,
physical_size.width as i32,
physical_size.height as i32,
);
}
}
fn present<T: AsRef<str>>(
&mut self,
renderer: &mut Self::Renderer,
viewport: &Viewport,
color: Color,
overlay: &[T],
) {
let gl = &self.gl;
let [r, g, b, a] = color.into_linear();
unsafe {
gl.clear_color(r, g, b, a);
gl.clear(glow::COLOR_BUFFER_BIT);
}
renderer.with_primitives(|backend, primitive| {
backend.present(gl, primitive, viewport, overlay);
});
}
}
|
