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Refactored image cache task - details below.

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* Simpler image cache API for clients to use.
 * Significantly fewer threads.
   * One thread for image cache task (multiplexes commands, decoder threads and async resource requests).
   * 4 threads for decoder worker tasks.
 * Removed ReflowEvent hacks in script and layout tasks.
   * Image elements pass a Trusted<T> to image cache, which is used to dirty nodes via script task. Previous use of Untrusted addresses was unsafe.
   * Image requests such as background-image on layout / paint threads trigger repaint only rather than full reflow.
 * Add reflow batching for when multiple images load quickly.
   * Reduces the number of paints loading wikipedia from ~95 to ~35.
 * Reasonably simple to add proper prefetch support in a follow up PR.
 * Async loaded images always construct Image fragments now, instead of generic.
   * Image fragments support the image not being present.
 * Simpler implementation of synchronous image loading for reftests.
 * Removed image holder.
 * image.onload support.
 * image NaturalWidth and NaturalHeight support.
 * Updated WPT expectations.
This commit is contained in:
Glenn Watson 2015-04-20 13:34:26 +10:00
parent e278e5b9a2
commit d8aef7208e
33 changed files with 2785 additions and 1679 deletions
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2
components/script_traits/lib.rs
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@ -24,7 +24,6 @@ use msg::compositor_msg::ScriptListener;
use net_traits::ResourceTask;
use net_traits::image_cache_task::ImageCacheTask;
use net_traits::storage_task::StorageTask;
use util::smallvec::SmallVec1;
use std::any::Any;
use std::sync::mpsc::{Sender, Receiver};
@ -89,7 +88,6 @@ pub enum MouseButton {
/// Events from the compositor that the script task needs to know about
pub enum CompositorEvent {
ResizeEvent(WindowSizeData),
ReflowEvent(SmallVec1<UntrustedNodeAddress>),
ClickEvent(MouseButton, Point2D<f32>),
MouseDownEvent(MouseButton, Point2D<f32>),
MouseUpEvent(MouseButton, Point2D<f32>),