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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
use std::ptr;
use anyhow::{ensure, Context};
use smithay::backend::allocator::Fourcc;
use smithay::backend::renderer::element::RenderElement;
use smithay::backend::renderer::gles::{GlesMapping, GlesRenderer, GlesTexture};
use smithay::backend::renderer::sync::SyncPoint;
use smithay::backend::renderer::{buffer_dimensions, Bind, ExportMem, Frame, Offscreen, Renderer};
use smithay::reexports::wayland_server::protocol::wl_buffer::WlBuffer;
use smithay::reexports::wayland_server::protocol::wl_shm;
use smithay::utils::{Physical, Rectangle, Scale, Size, Transform};
use smithay::wayland::shm;
pub mod gradient;
pub mod offscreen;
pub mod primary_gpu_pixel_shader;
pub mod primary_gpu_texture;
pub mod render_elements;
pub mod renderer;
pub mod shaders;
/// What we're rendering for.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum RenderTarget {
/// Rendering to display on screen.
Output,
/// Rendering for a screencast.
Screencast,
/// Rendering for any other screen capture.
ScreenCapture,
}
pub fn render_to_texture(
renderer: &mut GlesRenderer,
size: Size<i32, Physical>,
scale: Scale<f64>,
transform: Transform,
fourcc: Fourcc,
elements: impl Iterator<Item = impl RenderElement<GlesRenderer>>,
) -> anyhow::Result<(GlesTexture, SyncPoint)> {
let _span = tracy_client::span!();
let buffer_size = size.to_logical(1).to_buffer(1, Transform::Normal);
let texture: GlesTexture = renderer
.create_buffer(fourcc, buffer_size)
.context("error creating texture")?;
renderer
.bind(texture.clone())
.context("error binding texture")?;
let sync_point = render_elements(renderer, size, scale, transform, elements)?;
Ok((texture, sync_point))
}
pub fn render_and_download(
renderer: &mut GlesRenderer,
size: Size<i32, Physical>,
scale: Scale<f64>,
transform: Transform,
fourcc: Fourcc,
elements: impl Iterator<Item = impl RenderElement<GlesRenderer>>,
) -> anyhow::Result<GlesMapping> {
let _span = tracy_client::span!();
let (_, sync_point) = render_to_texture(renderer, size, scale, transform, fourcc, elements)?;
sync_point.wait();
let buffer_size = size.to_logical(1).to_buffer(1, Transform::Normal);
let mapping = renderer
.copy_framebuffer(Rectangle::from_loc_and_size((0, 0), buffer_size), fourcc)
.context("error copying framebuffer")?;
Ok(mapping)
}
pub fn render_to_vec(
renderer: &mut GlesRenderer,
size: Size<i32, Physical>,
scale: Scale<f64>,
transform: Transform,
fourcc: Fourcc,
elements: impl Iterator<Item = impl RenderElement<GlesRenderer>>,
) -> anyhow::Result<Vec<u8>> {
let _span = tracy_client::span!();
let mapping = render_and_download(renderer, size, scale, transform, fourcc, elements)
.context("error rendering")?;
let copy = renderer
.map_texture(&mapping)
.context("error mapping texture")?;
Ok(copy.to_vec())
}
#[cfg(feature = "xdp-gnome-screencast")]
pub fn render_to_dmabuf(
renderer: &mut GlesRenderer,
dmabuf: smithay::backend::allocator::dmabuf::Dmabuf,
size: Size<i32, Physical>,
scale: Scale<f64>,
transform: Transform,
elements: impl Iterator<Item = impl RenderElement<GlesRenderer>>,
) -> anyhow::Result<SyncPoint> {
let _span = tracy_client::span!();
renderer.bind(dmabuf).context("error binding texture")?;
render_elements(renderer, size, scale, transform, elements)
}
pub fn render_to_shm(
renderer: &mut GlesRenderer,
buffer: &WlBuffer,
scale: Scale<f64>,
transform: Transform,
elements: impl Iterator<Item = impl RenderElement<GlesRenderer>>,
) -> anyhow::Result<()> {
let _span = tracy_client::span!();
let buffer_size = buffer_dimensions(buffer).context("error getting buffer dimensions")?;
let size = buffer_size.to_logical(1, Transform::Normal).to_physical(1);
let mapping =
render_and_download(renderer, size, scale, transform, Fourcc::Argb8888, elements)?;
let bytes = renderer
.map_texture(&mapping)
.context("error mapping texture")?;
shm::with_buffer_contents_mut(buffer, |shm_buffer, shm_len, buffer_data| {
ensure!(
// The buffer prefers pixels in little endian ...
buffer_data.format == wl_shm::Format::Argb8888
&& buffer_data.stride == size.w * 4
&& buffer_data.height == size.h
&& shm_len as i32 == buffer_data.stride * buffer_data.height,
"invalid buffer format or size"
);
ensure!(bytes.len() == shm_len, "mapped buffer has wrong length");
unsafe {
let _span = tracy_client::span!("copy_nonoverlapping");
ptr::copy_nonoverlapping(bytes.as_ptr(), shm_buffer.cast(), shm_len);
}
Ok(())
})
.context("expected shm buffer, but didn't get one")?
}
fn render_elements(
renderer: &mut GlesRenderer,
size: Size<i32, Physical>,
scale: Scale<f64>,
transform: Transform,
elements: impl Iterator<Item = impl RenderElement<GlesRenderer>>,
) -> anyhow::Result<SyncPoint> {
let transform = transform.invert();
let output_rect = Rectangle::from_loc_and_size((0, 0), transform.transform_size(size));
let mut frame = renderer
.render(size, transform)
.context("error starting frame")?;
frame
.clear([0., 0., 0., 0.], &[output_rect])
.context("error clearing")?;
for element in elements {
let src = element.src();
let dst = element.geometry(scale);
if let Some(mut damage) = output_rect.intersection(dst) {
damage.loc -= dst.loc;
element
.draw(&mut frame, src, dst, &[damage])
.context("error drawing element")?;
}
}
frame.finish().context("error finishing frame")
}
|
