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|
use smithay::backend::allocator::Fourcc;
use smithay::backend::renderer::element::solid::{SolidColorBuffer, SolidColorRenderElement};
use smithay::backend::renderer::element::utils::{Relocate, RelocateRenderElement};
use smithay::backend::renderer::element::{Element, Id, Kind, RenderElement, UnderlyingStorage};
use smithay::backend::renderer::gles::{GlesError, GlesFrame, GlesRenderer};
use smithay::backend::renderer::utils::{CommitCounter, DamageSet, OpaqueRegions};
use smithay::utils::{Buffer, Physical, Rectangle, Scale, Transform};
use super::primary_gpu_texture::PrimaryGpuTextureRenderElement;
use super::render_to_texture;
use super::renderer::AsGlesFrame;
use super::texture::{TextureBuffer, TextureRenderElement};
use crate::backend::tty::{TtyFrame, TtyRenderer, TtyRendererError};
/// Renders elements into an off-screen buffer.
#[derive(Debug)]
pub struct OffscreenRenderElement {
// The texture, if rendering succeeded.
texture: Option<PrimaryGpuTextureRenderElement>,
// The fallback buffer in case the rendering fails.
fallback: SolidColorRenderElement,
}
impl OffscreenRenderElement {
pub fn new(
renderer: &mut GlesRenderer,
scale: i32,
elements: &[impl RenderElement<GlesRenderer>],
result_alpha: f32,
) -> Self {
let _span = tracy_client::span!("OffscreenRenderElement::new");
let geo = elements
.iter()
.map(|ele| ele.geometry(Scale::from(f64::from(scale))))
.reduce(|a, b| a.merge(b))
.unwrap_or_default();
let logical_size = geo.size.to_logical(scale);
let fallback_buffer = SolidColorBuffer::new(logical_size, [1., 0., 0., 1.]);
let fallback = SolidColorRenderElement::from_buffer(
&fallback_buffer,
geo.loc,
Scale::from(scale as f64),
result_alpha,
Kind::Unspecified,
);
let elements = elements.iter().rev().map(|ele| {
RelocateRenderElement::from_element(ele, (-geo.loc.x, -geo.loc.y), Relocate::Relative)
});
match render_to_texture(
renderer,
geo.size,
Scale::from(scale as f64),
Transform::Normal,
Fourcc::Abgr8888,
elements,
) {
Ok((texture, _sync_point)) => {
let buffer = TextureBuffer::from_texture(
renderer,
texture,
scale as f64,
Transform::Normal,
Vec::new(),
);
let element = TextureRenderElement::from_texture_buffer(
buffer,
geo.loc.to_f64().to_logical(scale as f64),
result_alpha,
None,
None,
Kind::Unspecified,
);
Self {
texture: Some(PrimaryGpuTextureRenderElement(element)),
fallback,
}
}
Err(err) => {
warn!("error off-screening elements: {err:?}");
Self {
texture: None,
fallback,
}
}
}
}
}
impl Element for OffscreenRenderElement {
fn id(&self) -> &Id {
if let Some(texture) = &self.texture {
texture.id()
} else {
self.fallback.id()
}
}
fn current_commit(&self) -> CommitCounter {
if let Some(texture) = &self.texture {
texture.current_commit()
} else {
self.fallback.current_commit()
}
}
fn geometry(&self, scale: Scale<f64>) -> Rectangle<i32, Physical> {
if let Some(texture) = &self.texture {
texture.geometry(scale)
} else {
self.fallback.geometry(scale)
}
}
fn transform(&self) -> Transform {
if let Some(texture) = &self.texture {
texture.transform()
} else {
self.fallback.transform()
}
}
fn src(&self) -> Rectangle<f64, Buffer> {
if let Some(texture) = &self.texture {
texture.src()
} else {
self.fallback.src()
}
}
fn damage_since(
&self,
scale: Scale<f64>,
commit: Option<CommitCounter>,
) -> DamageSet<i32, Physical> {
if let Some(texture) = &self.texture {
texture.damage_since(scale, commit)
} else {
self.fallback.damage_since(scale, commit)
}
}
fn opaque_regions(&self, scale: Scale<f64>) -> OpaqueRegions<i32, Physical> {
if let Some(texture) = &self.texture {
texture.opaque_regions(scale)
} else {
self.fallback.opaque_regions(scale)
}
}
fn alpha(&self) -> f32 {
if let Some(texture) = &self.texture {
texture.alpha()
} else {
self.fallback.alpha()
}
}
fn kind(&self) -> Kind {
if let Some(texture) = &self.texture {
texture.kind()
} else {
self.fallback.kind()
}
}
}
impl RenderElement<GlesRenderer> for OffscreenRenderElement {
fn draw(
&self,
frame: &mut GlesFrame<'_>,
src: Rectangle<f64, Buffer>,
dst: Rectangle<i32, Physical>,
damage: &[Rectangle<i32, Physical>],
opaque_regions: &[Rectangle<i32, Physical>],
) -> Result<(), GlesError> {
let gles_frame = frame.as_gles_frame();
if let Some(texture) = &self.texture {
RenderElement::<GlesRenderer>::draw(
texture,
gles_frame,
src,
dst,
damage,
opaque_regions,
)?;
} else {
RenderElement::<GlesRenderer>::draw(
&self.fallback,
gles_frame,
src,
dst,
damage,
opaque_regions,
)?;
}
Ok(())
}
fn underlying_storage(&self, renderer: &mut GlesRenderer) -> Option<UnderlyingStorage> {
if let Some(texture) = &self.texture {
texture.underlying_storage(renderer)
} else {
self.fallback.underlying_storage(renderer)
}
}
}
impl<'render> RenderElement<TtyRenderer<'render>> for OffscreenRenderElement {
fn draw(
&self,
frame: &mut TtyFrame<'_, '_>,
src: Rectangle<f64, Buffer>,
dst: Rectangle<i32, Physical>,
damage: &[Rectangle<i32, Physical>],
opaque_regions: &[Rectangle<i32, Physical>],
) -> Result<(), TtyRendererError<'render>> {
let gles_frame = frame.as_gles_frame();
if let Some(texture) = &self.texture {
RenderElement::<GlesRenderer>::draw(
texture,
gles_frame,
src,
dst,
damage,
opaque_regions,
)?;
} else {
RenderElement::<GlesRenderer>::draw(
&self.fallback,
gles_frame,
src,
dst,
damage,
opaque_regions,
)?;
}
Ok(())
}
fn underlying_storage(&self, renderer: &mut TtyRenderer<'render>) -> Option<UnderlyingStorage> {
if let Some(texture) = &self.
|
