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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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12
tests/wpt/mozilla/tests/mozilla/img_width_height.html
View file

@ -11,22 +11,14 @@
async_test(function() {
var img = window.document.getElementsByTagName("img")[0];
var wait_for_img_load = this.step_func(function (f) {
if (img.width != 0) {
f();
} else {
window.setTimeout(function() { wait_for_img_load(f) }, 1);
}
});
wait_for_img_load(this.step_func_done(function() {
img.onload = this.step_func_done(function() {
assert_equals(img.width, 500);
assert_equals(img.height, 378);
img.width = 200;
img.height = 100;
assert_equals(img.width, 200);
assert_equals(img.height, 100);
}));
});
});
</script>
</body>