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use std::collections::HashMap;
use std::time::Duration;
use anyhow::Context as _;
use glam::{Mat3, Vec2};
use smithay::backend::allocator::Fourcc;
use smithay::backend::renderer::element::texture::TextureRenderElement;
use smithay::backend::renderer::element::utils::{
Relocate, RelocateRenderElement, RescaleRenderElement,
};
use smithay::backend::renderer::element::{Id, Kind, RenderElement};
use smithay::backend::renderer::gles::{GlesRenderer, Uniform};
use smithay::backend::renderer::{Renderer as _, Texture};
use smithay::utils::{Logical, Point, Rectangle, Scale, Size, Transform};
use crate::animation::Animation;
use crate::niri_render_elements;
use crate::render_helpers::primary_gpu_texture::PrimaryGpuTextureRenderElement;
use crate::render_helpers::render_to_encompassing_texture;
use crate::render_helpers::shader_element::ShaderRenderElement;
use crate::render_helpers::shaders::{mat3_uniform, ProgramType, Shaders};
#[derive(Debug)]
pub struct OpenAnimation {
anim: Animation,
random_seed: f32,
}
niri_render_elements! {
OpeningWindowRenderElement => {
Texture = RelocateRenderElement<RescaleRenderElement<PrimaryGpuTextureRenderElement>>,
Shader = ShaderRenderElement,
}
}
impl OpenAnimation {
pub fn new(anim: Animation) -> Self {
Self {
anim,
random_seed: fastrand::f32(),
}
}
pub fn advance_animations(&mut self, current_time: Duration) {
self.anim.set_current_time(current_time);
}
pub fn is_done(&self) -> bool {
self.anim.is_done()
}
// We can't depend on view_rect here, because the result of window opening can be snapshot and
// then rendered elsewhere.
pub fn render(
&self,
renderer: &mut GlesRenderer,
elements: &[impl RenderElement<GlesRenderer>],
geo_size: Size<i32, Logical>,
location: Point<i32, Logical>,
scale: Scale<f64>,
) -> anyhow::Result<OpeningWindowRenderElement> {
let progress = self.anim.value();
let clamped_progress = self.anim.clamped_value().clamp(0., 1.);
let (texture, _sync_point, geo) = render_to_encompassing_texture(
renderer,
scale,
Transform::Normal,
Fourcc::Abgr8888,
elements,
)
.context("error rendering to texture")?;
let offset = geo.loc.to_f64().to_logical(scale);
let texture_size = geo.size.to_f64().to_logical(scale);
if Shaders::get(renderer).program(ProgramType::Open).is_some() {
let mut area = Rectangle::from_loc_and_size(location.to_f64() + offset, texture_size);
// Expand the area a bit to allow for more varied effects.
let mut target_size = area.size.upscale(1.5);
target_size.w = f64::max(area.size.w + 1000., target_size.w);
target_size.h = f64::max(area.size.h + 1000., target_size.h);
let diff = target_size.to_point() - area.size.to_point();
area.loc -= diff.downscale(2.);
area.size += diff.to_size();
let area = area.to_i32_up();
let area_loc = Vec2::new(area.loc.x as f32, area.loc.y as f32);
let area_size = Vec2::new(area.size.w as f32, area.size.h as f32);
let geo_loc = Vec2::new(location.x as f32, location.y as f32);
let geo_size = Vec2::new(geo_size.w as f32, geo_size.h as f32);
let input_to_geo = Mat3::from_scale(area_size / geo_size)
* Mat3::from_translation((area_loc - geo_loc) / area_size);
let tex_scale = Vec2::new(scale.x as f32, scale.y as f32);
let tex_loc = Vec2::new(offset.x as f32, offset.y as f32);
let tex_size = Vec2::new(texture.width() as f32, texture.height() as f32) / tex_scale;
let geo_to_tex =
Mat3::from_translation(-tex_loc / tex_size) * Mat3::from_scale(geo_size / tex_size);
return Ok(ShaderRenderElement::new(
ProgramType::Open,
area.size,
None,
1.,
vec![
mat3_uniform("niri_input_to_geo", input_to_geo),
Uniform::new("niri_geo_size", geo_size.to_array()),
mat3_uniform("niri_geo_to_tex", geo_to_tex),
Uniform::new("niri_progress", progress as f32),
Uniform::new("niri_clamped_progress", clamped_progress as f32),
Uniform::new("niri_random_seed", self.random_seed),
],
HashMap::from([(String::from("niri_tex"), texture.clone())]),
Kind::Unspecified,
)
.with_location(area.loc)
.into());
}
let elem = TextureRenderElement::from_static_texture(
Id::new(),
renderer.id(),
Point::from((0., 0.)),
texture.clone(),
scale.x as i32,
Transform::Normal,
Some(clamped_progress as f32),
None,
None,
None,
Kind::Unspecified,
);
let elem = PrimaryGpuTextureRenderElement(elem);
let center = geo_size.to_point().to_f64().downscale(2.);
let elem = RescaleRenderElement::from_element(
elem,
(center - offset).to_physical_precise_round(scale),
(progress / 2. + 0.5).max(0.),
);
let elem = RelocateRenderElement::from_element(
elem,
(location.to_f64() + offset).to_physical_precise_round(scale),
Relocate::Relative,
);
Ok(elem.into())
}
}
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