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-rw-r--r--gfx/wr/examples/alpha_perf.rs95
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diff --git a/gfx/wr/examples/alpha_perf.rs b/gfx/wr/examples/alpha_perf.rs
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+extern crate euclid;
+extern crate gleam;
+extern crate glutin;
+extern crate webrender;
+extern crate winit;
+
+#[path = "common/boilerplate.rs"]
+mod boilerplate;
+
+use crate::boilerplate::{Example, HandyDandyRectBuilder};
+use std::cmp;
+use webrender::api::*;
+use webrender::render_api::*;
+use webrender::api::units::DeviceIntSize;
+
+
+struct App {
+ rect_count: usize,
+}
+
+impl Example for App {
+ fn render(
+ &mut self,
+ _api: &mut RenderApi,
+ builder: &mut DisplayListBuilder,
+ _txn: &mut Transaction,
+ _device_size: DeviceIntSize,
+ pipeline_id: PipelineId,
+ _document_id: DocumentId,
+ ) {
+ let bounds = (0, 0).to(1920, 1080);
+ let space_and_clip = SpaceAndClipInfo::root_scroll(pipeline_id);
+
+ builder.push_simple_stacking_context(
+ bounds.min,
+ space_and_clip.spatial_id,
+ PrimitiveFlags::IS_BACKFACE_VISIBLE,
+ );
+
+ for _ in 0 .. self.rect_count {
+ builder.push_rect(
+ &CommonItemProperties::new(bounds, space_and_clip),
+ bounds,
+ ColorF::new(1.0, 1.0, 1.0, 0.05)
+ );
+ }
+
+ builder.pop_stacking_context();
+ }
+
+ fn on_event(
+ &mut self,
+ event: winit::event::WindowEvent,
+ _window: &winit::window::Window,
+ _api: &mut RenderApi,
+ _document_id: DocumentId,
+ ) -> bool {
+ match event {
+ winit::event::WindowEvent::KeyboardInput {
+ input: winit::event::KeyboardInput {
+ state: winit::event::ElementState::Pressed,
+ virtual_keycode: Some(key),
+ ..
+ },
+ ..
+ } => {
+ match key {
+ winit::event::VirtualKeyCode::Right => {
+ self.rect_count += 1;
+ println!("rects = {}", self.rect_count);
+ }
+ winit::event::VirtualKeyCode::Left => {
+ self.rect_count = cmp::max(self.rect_count, 1) - 1;
+ println!("rects = {}", self.rect_count);
+ }
+ _ => {}
+ };
+ }
+ _ => (),
+ }
+
+ true
+ }
+}
+
+fn main() {
+ let mut app = App {
+ rect_count: 1,
+ };
+ boilerplate::main_wrapper(&mut app, None);
+}