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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
//! This example creates a 200x200 white rect and allows the user to move it
//! around by using the arrow keys and rotate with '<'/'>'.
//! It does this by using the animation API.
//! The example also features seamless opaque/transparent split of a
//! rounded cornered rectangle, which is done automatically during the
//! scene building for render optimization.
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 euclid::Angle;
use webrender::api::*;
use webrender::render_api::*;
use webrender::api::units::*;
struct App {
property_key0: PropertyBindingKey<LayoutTransform>,
property_key1: PropertyBindingKey<LayoutTransform>,
property_key2: PropertyBindingKey<LayoutTransform>,
opacity_key: PropertyBindingKey<f32>,
opacity: f32,
angle0: f32,
angle1: f32,
angle2: f32,
}
impl App {
fn add_rounded_rect(
&mut self,
bounds: LayoutRect,
color: ColorF,
builder: &mut DisplayListBuilder,
pipeline_id: PipelineId,
property_key: PropertyBindingKey<LayoutTransform>,
opacity_key: Option<PropertyBindingKey<f32>>,
spatial_tree_item_key: SpatialTreeItemKey,
) {
let filters = match opacity_key {
Some(opacity_key) => {
vec![
FilterOp::Opacity(PropertyBinding::Binding(opacity_key, self.opacity), self.opacity),
]
}
None => {
vec![]
}
};
let spatial_id = builder.push_reference_frame(
bounds.min,
SpatialId::root_scroll_node(pipeline_id),
TransformStyle::Flat,
PropertyBinding::Binding(property_key, LayoutTransform::identity()),
ReferenceFrameKind::Transform {
is_2d_scale_translation: false,
should_snap: false,
paired_with_perspective: false,
},
spatial_tree_item_key,
);
builder.push_simple_stacking_context_with_filters(
LayoutPoint::zero(),
spatial_id,
PrimitiveFlags::IS_BACKFACE_VISIBLE,
&filters,
&[],
&[]
);
let space_and_clip = SpaceAndClipInfo {
spatial_id,
clip_chain_id: ClipChainId::INVALID,
};
let clip_bounds = LayoutRect::from_size(bounds.size());
let complex_clip = ComplexClipRegion {
rect: clip_bounds,
radii: BorderRadius::uniform(30.0),
mode: ClipMode::Clip,
};
let clip_id = builder.define_clip_rounded_rect(
space_and_clip.spatial_id,
complex_clip,
);
let clip_chain_id = builder.define_clip_chain(None, [clip_id]);
// Fill it with a white rect
builder.push_rect(
&CommonItemProperties::new(
LayoutRect::from_size(bounds.size()),
SpaceAndClipInfo {
spatial_id,
clip_chain_id,
}
),
LayoutRect::from_size(bounds.size()),
color,
);
builder.pop_stacking_context();
builder.pop_reference_frame();
}
}
impl Example for App {
const WIDTH: u32 = 2048;
const HEIGHT: u32 = 1536;
fn render(
&mut self,
_api: &mut RenderApi,
builder: &mut DisplayListBuilder,
_txn: &mut Transaction,
_device_size: DeviceIntSize,
pipeline_id: PipelineId,
_document_id: DocumentId,
) {
let opacity_key = self.opacity_key;
let bounds = (150, 150).to(250, 250);
let key0 = self.property_key0;
self.add_rounded_rect(
bounds,
ColorF::new(1.0, 0.0, 0.0, 0.5),
builder,
pipeline_id,
key0,
Some(opacity_key),
SpatialTreeItemKey::new(0, 0)
);
let bounds = (400, 400).to(600, 600);
let key1 = self.property_key1;
self.add_rounded_rect(
bounds,
ColorF::new(0.0, 1.0, 0.0, 0.5),
builder,
pipeline_id,
key1,
None,
SpatialTreeItemKey::new(0, 1)
);
let bounds = (200, 500).to(350, 580);
let key2 = self.property_key2;
self.add_rounded_rect(
bounds,
ColorF::new(0.0, 0.0, 1.0, 0.5),
builder,
pipeline_id,
key2,
None,
SpatialTreeItemKey::new(0, 2)
);
}
fn on_event(
&mut self,
win_event: winit::event::WindowEvent,
_window: &winit::window::Window,
api: &mut RenderApi,
document_id: DocumentId
) -> bool {
let mut rebuild_display_list = false;
match win_event {
winit::event::WindowEvent::KeyboardInput {
input: winit::event::KeyboardInput {
state: winit::event::ElementState::Pressed,
virtual_keycode: Some(key),
..
},
..
} => {
let (delta_angle, delta_opacity) = match key {
winit::event::VirtualKeyCode::Down => (0.0, -0.1),
winit::event::VirtualKeyCode::Up => (0.0, 0.1),
winit::event::VirtualKeyCode::Right => (1.0, 0.0),
winit::event::VirtualKeyCode::Left => (-1.0, 0.0),
winit::event::VirtualKeyCode::R => {
rebuild_display_list = true;
(0.0, 0.0)
}
_ => return false,
};
// Update the transform based on the keyboard input and push it to
// webrender using the generate_frame API. This will recomposite with
// the updated transform.
self.opacity += delta_opacity;
self.angle0 += delta_angle * 0.1;
self.angle1 += delta_angle * 0.2;
self.angle2 -= delta_angle * 0.15;
let xf0 = LayoutTransform::rotation(0.0, 0.0, 1.0, Angle::radians(self.angle0));
let xf1 = LayoutTransform::rotation(0.0, 0.0, 1.0, Angle::radians(self.angle1));
let xf2 = LayoutTransform::rotation(0.0, 0.0, 1.0, Angle::radians(self.angle2));
let mut txn = Transaction::new();
txn.reset_dynamic_properties();
txn.append_dynamic_properties(
DynamicProperties {
transforms: vec![
PropertyValue {
key: self.property_key0,
value: xf0,
},
PropertyValue {
key: self.property_key1,
value: xf1,
},
PropertyValue {
key: self.property_key2,
value: xf2,
},
],
floats: vec![
PropertyValue {
key: self.opacity_key,
value: self.opacity,
}
],
colors: vec![],
},
);
txn.generate_frame(0, RenderReasons::empty());
api.send_transaction(document_id, txn);
}
_ => (),
}
rebuild_display_list
}
}
fn main() {
let mut app = App {
property_key0: PropertyBindingKey::new(42), // arbitrary magic number
property_key1: PropertyBindingKey::new(44), // arbitrary magic number
property_key2: PropertyBindingKey::new(45), // arbitrary magic number
opacity_key: PropertyBindingKey::new(43),
opacity: 0.5,
angle0: 0.0,
angle1: 0.0,
angle2: 0.0,
};
boilerplate::main_wrapper(&mut app, None);
}