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e7019f2721
Instead of producing a tree of stacking contexts, display list
generation now produces a flat list of display items and a tree of
stacking contexts. This will eventually allow display list construction
to produce and modify WebRender vertex buffers directly, removing the
overhead of display list conversion. This change also moves
layerization of the display list to the paint thread, since it isn't
currently useful for WebRender.
To accomplish this, display list generation now takes three passes of
the flow tree:
1. Calculation of absolute positions.
2. Collection of a tree of stacking contexts.
3. Creation of a list of display items.
After collection of display items, they are sorted based upon the index
of their parent stacking contexts and their position in CSS 2.1
Appendeix E stacking order.
This is a big change, but it actually simplifies display list generation.
125 lines
3.5 KiB
Rust
125 lines
3.5 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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extern crate time as std_time;
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use energy::read_energy_uj;
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use ipc_channel::ipc::IpcSender;
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use self::std_time::precise_time_ns;
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#[derive(PartialEq, Clone, PartialOrd, Eq, Ord, Deserialize, Serialize)]
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pub struct TimerMetadata {
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pub url: String,
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pub iframe: TimerMetadataFrameType,
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pub incremental: TimerMetadataReflowType,
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}
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#[derive(Clone, Deserialize, Serialize)]
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pub struct ProfilerChan(pub IpcSender<ProfilerMsg>);
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impl ProfilerChan {
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pub fn send(&self, msg: ProfilerMsg) {
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let ProfilerChan(ref c) = *self;
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c.send(msg).unwrap();
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}
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}
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#[derive(Clone, Deserialize, Serialize)]
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pub enum ProfilerMsg {
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/// Normal message used for reporting time
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Time((ProfilerCategory, Option<TimerMetadata>), (u64, u64), (u64, u64)),
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/// Message used to force print the profiling metrics
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Print,
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/// Tells the profiler to shut down.
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Exit,
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}
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#[repr(u32)]
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#[derive(PartialEq, Clone, PartialOrd, Eq, Ord, Deserialize, Serialize, Debug, Hash)]
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pub enum ProfilerCategory {
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Compositing,
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LayoutPerform,
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LayoutStyleRecalc,
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LayoutTextShaping,
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LayoutRestyleDamagePropagation,
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LayoutNonIncrementalReset,
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LayoutSelectorMatch,
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LayoutTreeBuilder,
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LayoutDamagePropagate,
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LayoutGeneratedContent,
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LayoutDisplayListSorting,
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LayoutMain,
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LayoutParallelWarmup,
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LayoutDispListBuild,
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PaintingPerTile,
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PaintingPrepBuff,
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Painting,
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ImageDecoding,
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ScriptAttachLayout,
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ScriptConstellationMsg,
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ScriptDevtoolsMsg,
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ScriptDocumentEvent,
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ScriptDomEvent,
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ScriptEvent,
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ScriptFileRead,
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ScriptImageCacheMsg,
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ScriptInputEvent,
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ScriptNetworkEvent,
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ScriptPlannedNavigation,
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ScriptResize,
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ScriptSetViewport,
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ScriptTimerEvent,
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ScriptStylesheetLoad,
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ScriptUpdateReplacedElement,
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ScriptWebSocketEvent,
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ScriptWorkerEvent,
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ApplicationHeartbeat,
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}
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#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Deserialize, Serialize)]
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pub enum TimerMetadataFrameType {
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RootWindow,
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IFrame,
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}
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#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Deserialize, Serialize)]
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pub enum TimerMetadataReflowType {
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Incremental,
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FirstReflow,
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}
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pub fn profile<T, F>(category: ProfilerCategory,
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meta: Option<TimerMetadata>,
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profiler_chan: ProfilerChan,
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callback: F)
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-> T
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where F: FnOnce() -> T
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{
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let start_energy = read_energy_uj();
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let start_time = precise_time_ns();
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let val = callback();
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let end_time = precise_time_ns();
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let end_energy = read_energy_uj();
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send_profile_data(category,
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meta,
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profiler_chan,
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start_time,
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end_time,
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start_energy,
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end_energy);
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val
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}
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pub fn send_profile_data(category: ProfilerCategory,
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meta: Option<TimerMetadata>,
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profiler_chan: ProfilerChan,
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start_time: u64,
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end_time: u64,
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start_energy: u64,
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end_energy: u64) {
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profiler_chan.send(ProfilerMsg::Time((category, meta),
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(start_time, end_time),
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(start_energy, end_energy)));
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}
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