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use std::collections::HashMap;
use smithay::backend::renderer::element::{Element, Id, Kind, RenderElement, UnderlyingStorage};
use smithay::backend::renderer::gles::{GlesError, GlesFrame, GlesRenderer, GlesTexture, Uniform};
use smithay::backend::renderer::utils::{CommitCounter, DamageSet};
use smithay::utils::{Buffer, Logical, Physical, Rectangle, Scale, Size, Transform};
use super::primary_gpu_pixel_shader_with_textures::PrimaryGpuPixelShaderWithTexturesRenderElement;
use super::renderer::AsGlesFrame;
use super::shaders::Shaders;
use crate::backend::tty::{TtyFrame, TtyRenderer, TtyRendererError};
#[derive(Debug)]
pub struct CrossfadeRenderElement(PrimaryGpuPixelShaderWithTexturesRenderElement);
impl CrossfadeRenderElement {
#[allow(clippy::too_many_arguments)]
pub fn new(
renderer: &mut GlesRenderer,
area: Rectangle<i32, Logical>,
scale: Scale<f64>,
texture_from: (GlesTexture, Rectangle<i32, Physical>),
size_from: Size<i32, Logical>,
texture_to: (GlesTexture, Rectangle<i32, Physical>),
size_to: Size<i32, Logical>,
amount: f32,
result_alpha: f32,
) -> Option<Self> {
let (texture_from, texture_from_geo) = texture_from;
let (texture_to, texture_to_geo) = texture_to;
let scale_from = area.size.to_f64() / size_from.to_f64();
let scale_to = area.size.to_f64() / size_to.to_f64();
let tex_from_geo = texture_from_geo.to_f64().upscale(scale_from);
let tex_to_geo = texture_to_geo.to_f64().upscale(scale_to);
let combined_geo = tex_from_geo.merge(tex_to_geo);
let size = combined_geo
.size
.to_logical(1.)
.to_buffer(1., Transform::Normal);
let area = Rectangle::from_loc_and_size(
area.loc + combined_geo.loc.to_logical(scale).to_i32_round(),
combined_geo.size.to_logical(scale).to_i32_round(),
);
let tex_from_loc = (tex_from_geo.loc - combined_geo.loc)
.downscale((combined_geo.size.w, combined_geo.size.h));
let tex_to_loc = (tex_to_geo.loc - combined_geo.loc)
.downscale((combined_geo.size.w, combined_geo.size.h));
let tex_from_size = tex_from_geo.size / combined_geo.size;
let tex_to_size = tex_to_geo.size / combined_geo.size;
// FIXME: cropping this element will mess up the coordinates.
Shaders::get(renderer).crossfade.clone().map(|shader| {
Self(PrimaryGpuPixelShaderWithTexturesRenderElement::new(
shader,
HashMap::from([
(String::from("tex_from"), texture_from),
(String::from("tex_to"), texture_to),
]),
area,
size,
None,
result_alpha,
vec![
Uniform::new(
"tex_from_loc",
(tex_from_loc.x as f32, tex_from_loc.y as f32),
),
Uniform::new(
"tex_from_size",
(tex_from_size.x as f32, tex_from_size.y as f32),
),
Uniform::new("tex_to_loc", (tex_to_loc.x as f32, tex_to_loc.y as f32)),
Uniform::new("tex_to_size", (tex_to_size.x as f32, tex_to_size.y as f32)),
Uniform::new("amount", amount),
],
Kind::Unspecified,
))
})
}
}
impl Element for CrossfadeRenderElement {
fn id(&self) -> &Id {
self.0.id()
}
fn current_commit(&self) -> CommitCounter {
self.0.current_commit()
}
fn geometry(&self, scale: Scale<f64>) -> Rectangle<i32, Physical> {
self.0.geometry(scale)
}
fn transform(&self) -> Transform {
self.0.transform()
}
fn src(&self) -> Rectangle<f64, Buffer> {
self.0.src()
}
fn damage_since(
&self,
scale: Scale<f64>,
commit: Option<CommitCounter>,
) -> DamageSet<i32, Physical> {
self.0.damage_since(scale, commit)
}
fn opaque_regions(&self, scale: Scale<f64>) -> Vec<Rectangle<i32, Physical>> {
self.0.opaque_regions(scale)
}
fn alpha(&self) -> f32 {
self.0.alpha()
}
fn kind(&self) -> Kind {
self.0.kind()
}
}
impl RenderElement<GlesRenderer> for CrossfadeRenderElement {
fn draw(
&self,
frame: &mut GlesFrame<'_>,
src: Rectangle<f64, Buffer>,
dst: Rectangle<i32, Physical>,
damage: &[Rectangle<i32, Physical>],
) -> Result<(), GlesError> {
RenderElement::<GlesRenderer>::draw(&self.0, frame, src, dst, damage)?;
Ok(())
}
fn underlying_storage(&self, renderer: &mut GlesRenderer) -> Option<UnderlyingStorage> {
self.0.underlying_storage(renderer)
}
}
impl<'render> RenderElement<TtyRenderer<'render>> for CrossfadeRenderElement {
fn draw(
&self,
frame: &mut TtyFrame<'_, '_>,
src: Rectangle<f64, Buffer>,
dst: Rectangle<i32, Physical>,
damage: &[Rectangle<i32, Physical>],
) -> Result<(), TtyRendererError<'render>> {
let gles_frame = frame.as_gles_frame();
RenderElement::<GlesRenderer>::draw(&self.0, gles_frame, src, dst, damage)?;
Ok(())
}
fn underlying_storage(&self, renderer: &mut TtyRenderer<'render>) -> Option<UnderlyingStorage> {
self.0.underlying_storage(renderer)
}
}
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