зеркало из https://github.com/mozilla/gecko-dev.git
87 строки
2.9 KiB
Rust
87 строки
2.9 KiB
Rust
/* 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 gleam;
|
|
extern crate glutin;
|
|
extern crate webrender;
|
|
extern crate winit;
|
|
|
|
#[path = "common/boilerplate.rs"]
|
|
mod boilerplate;
|
|
|
|
use boilerplate::{Example, HandyDandyRectBuilder};
|
|
use webrender::api::*;
|
|
use webrender::api::units::*;
|
|
|
|
// This example uses the push_iframe API to nest a second pipeline's displaylist
|
|
// inside the root pipeline's display list. When it works, a green square is
|
|
// shown. If it fails, a red square is shown.
|
|
|
|
struct App {}
|
|
|
|
impl Example for App {
|
|
fn render(
|
|
&mut self,
|
|
api: &RenderApi,
|
|
builder: &mut DisplayListBuilder,
|
|
_txn: &mut Transaction,
|
|
_framebuffer_size: FramebufferIntSize,
|
|
pipeline_id: PipelineId,
|
|
document_id: DocumentId,
|
|
) {
|
|
// All the sub_* things are for the nested pipeline
|
|
let sub_size = DeviceIntSize::new(100, 100);
|
|
let sub_bounds = (0, 0).to(sub_size.width as i32, sub_size.height as i32);
|
|
|
|
let sub_pipeline_id = PipelineId(pipeline_id.0, 42);
|
|
let mut sub_builder = DisplayListBuilder::new(sub_pipeline_id, sub_bounds.size);
|
|
let mut space_and_clip = SpaceAndClipInfo::root_scroll(pipeline_id);
|
|
|
|
let info = LayoutPrimitiveInfo::new(sub_bounds);
|
|
sub_builder.push_simple_stacking_context(
|
|
&info,
|
|
space_and_clip.spatial_id,
|
|
);
|
|
|
|
// green rect visible == success
|
|
sub_builder.push_rect(&info, &space_and_clip, ColorF::new(0.0, 1.0, 0.0, 1.0));
|
|
sub_builder.pop_stacking_context();
|
|
|
|
let mut txn = Transaction::new();
|
|
txn.set_display_list(
|
|
Epoch(0),
|
|
None,
|
|
sub_bounds.size,
|
|
sub_builder.finalize(),
|
|
true,
|
|
);
|
|
api.send_transaction(document_id, txn);
|
|
|
|
space_and_clip.spatial_id = builder.push_reference_frame(
|
|
&sub_bounds,
|
|
space_and_clip.spatial_id,
|
|
TransformStyle::Flat,
|
|
PropertyBinding::Binding(PropertyBindingKey::new(42), LayoutTransform::identity()),
|
|
ReferenceFrameKind::Transform,
|
|
);
|
|
|
|
// And this is for the root pipeline
|
|
let info = LayoutPrimitiveInfo::new(sub_bounds);
|
|
builder.push_simple_stacking_context(
|
|
&info,
|
|
space_and_clip.spatial_id,
|
|
);
|
|
// red rect under the iframe: if this is visible, things have gone wrong
|
|
builder.push_rect(&info, &space_and_clip, ColorF::new(1.0, 0.0, 0.0, 1.0));
|
|
builder.push_iframe(&info, &space_and_clip, sub_pipeline_id, false);
|
|
builder.pop_stacking_context();
|
|
builder.pop_reference_frame();
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
let mut app = App {};
|
|
boilerplate::main_wrapper(&mut app, None);
|
|
}
|