visual-tests: Add gradient angle and area tests

niri-visual-tests/src/cases/gradient_angle.rs

@@ -0,0 +1,76 @@
+use std::f32::consts::{FRAC_PI_2, PI};
+use std::sync::atomic::Ordering;
+use std::time::Duration;
+
+use niri::animation::ANIMATION_SLOWDOWN;
+use niri::render_helpers::gradient::GradientRenderElement;
+use smithay::backend::renderer::element::RenderElement;
+use smithay::backend::renderer::gles::GlesRenderer;
+use smithay::utils::{Logical, Physical, Rectangle, Scale, Size};
+
+use super::TestCase;
+
+pub struct GradientAngle {
+    angle: f32,
+    prev_time: Duration,
+}
+
+impl GradientAngle {
+    pub fn new(_size: Size<i32, Logical>) -> Self {
+        Self {
+            angle: 0.,
+            prev_time: Duration::ZERO,
+        }
+    }
+}
+
+impl TestCase for GradientAngle {
+    fn are_animations_ongoing(&self) -> bool {
+        true
+    }
+
+    fn advance_animations(&mut self, current_time: Duration) {
+        let mut delta = if self.prev_time.is_zero() {
+            Duration::ZERO
+        } else {
+            current_time.saturating_sub(self.prev_time)
+        };
+        self.prev_time = current_time;
+
+        let slowdown = ANIMATION_SLOWDOWN.load(Ordering::SeqCst);
+        if slowdown == 0. {
+            delta = Duration::ZERO
+        } else {
+            delta = delta.div_f64(slowdown);
+        }
+
+        self.angle += delta.as_secs_f32() * PI;
+
+        if self.angle >= PI * 2. {
+            self.angle -= PI * 2.
+        }
+    }
+
+    fn render(
+        &mut self,
+        renderer: &mut GlesRenderer,
+        size: Size<i32, Physical>,
+    ) -> Vec<Box<dyn RenderElement<GlesRenderer>>> {
+        let (a, b) = (size.w / 4, size.h / 4);
+        let size = (size.w - a * 2, size.h - b * 2);
+        let area = Rectangle::from_loc_and_size((a, b), size);
+
+        GradientRenderElement::new(
+            renderer,
+            Scale::from(1.),
+            area,
+            area,
+            [1., 0., 0., 1.],
+            [0., 1., 0., 1.],
+            self.angle - FRAC_PI_2,
+        )
+        .into_iter()
+        .map(|elem| Box::new(elem) as _)
+        .collect()
+    }
+}

niri-visual-tests/src/cases/gradient_area.rs

@@ -0,0 +1,116 @@
+use std::f32::consts::{FRAC_PI_4, PI};
+use std::sync::atomic::Ordering;
+use std::time::Duration;
+
+use niri::animation::ANIMATION_SLOWDOWN;
+use niri::layout::focus_ring::FocusRing;
+use niri::render_helpers::gradient::GradientRenderElement;
+use niri_config::Color;
+use smithay::backend::renderer::element::RenderElement;
+use smithay::backend::renderer::gles::GlesRenderer;
+use smithay::utils::{Logical, Physical, Point, Rectangle, Scale, Size};
+
+use super::TestCase;
+
+pub struct GradientArea {
+    progress: f32,
+    border: FocusRing,
+    prev_time: Duration,
+}
+
+impl GradientArea {
+    pub fn new(_size: Size<i32, Logical>) -> Self {
+        let mut border = FocusRing::new(niri_config::FocusRing {
+            off: false,
+            width: 1,
+            active_color: Color::new(255, 255, 255, 128),
+            inactive_color: Color::default(),
+            active_gradient: None,
+            inactive_gradient: None,
+        });
+        border.set_active(true);
+
+        Self {
+            progress: 0.,
+            border,
+            prev_time: Duration::ZERO,
+        }
+    }
+}
+
+impl TestCase for GradientArea {
+    fn are_animations_ongoing(&self) -> bool {
+        true
+    }
+
+    fn advance_animations(&mut self, current_time: Duration) {
+        let mut delta = if self.prev_time.is_zero() {
+            Duration::ZERO
+        } else {
+            current_time.saturating_sub(self.prev_time)
+        };
+        self.prev_time = current_time;
+
+        let slowdown = ANIMATION_SLOWDOWN.load(Ordering::SeqCst);
+        if slowdown == 0. {
+            delta = Duration::ZERO
+        } else {
+            delta = delta.div_f64(slowdown);
+        }
+
+        self.progress += delta.as_secs_f32() * PI;
+
+        if self.progress >= PI * 2. {
+            self.progress -= PI * 2.
+        }
+    }
+
+    fn render(
+        &mut self,
+        renderer: &mut GlesRenderer,
+        size: Size<i32, Physical>,
+    ) -> Vec<Box<dyn RenderElement<GlesRenderer>>> {
+        let mut rv = Vec::new();
+
+        let f = (self.progress.sin() + 1.) / 2.;
+
+        let (a, b) = (size.w / 4, size.h / 4);
+        let rect_size = (size.w - a * 2, size.h - b * 2);
+        let area = Rectangle::from_loc_and_size((a, b), rect_size);
+
+        let g_size = Size::from((
+            (size.w as f32 / 8. + size.w as f32 / 8. * 7. * f).round() as i32,
+            (size.h as f32 / 8. + size.h as f32 / 8. * 7. * f).round() as i32,
+        ));
+        let g_loc = ((size.w - g_size.w) / 2, (size.h - g_size.h) / 2);
+        let g_area = Rectangle::from_loc_and_size(g_loc, g_size);
+
+        self.border.update(g_size, true);
+        rv.extend(
+            self.border
+                .render(
+                    renderer,
+                    Point::from(g_loc),
+                    Scale::from(1.),
+                    size.to_logical(1),
+                )
+                .map(|elem| Box::new(elem) as _),
+        );
+
+        rv.extend(
+            GradientRenderElement::new(
+                renderer,
+                Scale::from(1.),
+                area,
+                g_area,
+                [1., 0., 0., 1.],
+                [0., 1., 0., 1.],
+                FRAC_PI_4,
+            )
+            .into_iter()
+            .map(|elem| Box::new(elem) as _),
+        );
+
+        rv
+    }
+}

niri-visual-tests/src/cases/mod.rs

@@ -4,12 +4,14 @@ use smithay::backend::renderer::element::RenderElement;
 use smithay::backend::renderer::gles::GlesRenderer;
 use smithay::utils::{Physical, Size};
 
+pub mod gradient_angle;
+pub mod gradient_area;
 pub mod layout;
 pub mod tile;
 pub mod window;
 
 pub trait TestCase {
-    fn resize(&mut self, width: i32, height: i32);
+    fn resize(&mut self, _width: i32, _height: i32) {}
     fn are_animations_ongoing(&self) -> bool {
         false
     }

niri-visual-tests/src/main.rs

@@ -16,6 +16,8 @@ use smithay::utils::{Logical, Size};
 use smithay_view::SmithayView;
 use tracing_subscriber::EnvFilter;
 
+use crate::cases::gradient_angle::GradientAngle;
+use crate::cases::gradient_area::GradientArea;
 use crate::cases::layout::Layout;
 use crate::cases::TestCase;
 
@@ -108,6 +110,9 @@ fn build_ui(app: &adw::Application) {
         "Layout - Open To The Left - Big",
     );
 
+    s.add(GradientAngle::new, "Gradient - Angle");
+    s.add(GradientArea::new, "Gradient - Area");
+
     let content_headerbar = adw::HeaderBar::new();
 
     let anim_adjustment = gtk::Adjustment::new(1., 0., 10., 0.1, 0.5, 0.);

niri-visual-tests/src/smithay_view.rs

@@ -11,6 +11,7 @@ mod imp {
     use anyhow::{ensure, Context};
     use gtk::gdk;
     use gtk::prelude::*;
+    use niri::render_helpers::shaders;
     use niri::utils::get_monotonic_time;
     use smithay::backend::egl::ffi::egl;
     use smithay::backend::egl::EGLContext;
@@ -190,8 +191,12 @@ mod imp {
             .into_iter()
             .filter(|c| *c != Capability::ColorTransformations);
 
-        GlesRenderer::with_capabilities(egl_context, capabilities)
+        let mut renderer = GlesRenderer::with_capabilities(egl_context, capabilities)
-            .context("error creating GlesRenderer")
+            .context("error creating GlesRenderer")?;
+
+        shaders::init(&mut renderer);
+
+        Ok(renderer)
     }
 
     unsafe fn with_framebuffer_save_restore<T>(