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Patrick Walton pcwalton

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pcwalton / dom-strawman.rs
Created July 24, 2019 20:35
Strawman proposal
// The cardinal rule is to never borrow the inside of a DOM object.
// DOM objects don't look like Rust objects to Rust code; their fields are only accessed
// with getters and setters.
// By forbidding borrowing DOM objects, most of the problems disappear.
dom_defclass! {
class Node {
parent_node: NullableJS<Node>,
first_child: NullableJS<Node>,
last_child: NullableJS<Node>,
@pcwalton
pcwalton / nba-notext.svg
Created March 27, 2019 03:29
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@pcwalton
pcwalton / mockup.svg
Created March 26, 2019 20:08
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pcwalton / smoothstep-replacement.inc.glsl
Created March 20, 2019 21:48
smoothstep-replacement.inc.glsl
float aastep(float edge0, float edge1, float x) {
float t = clamp((x - edge0) / (edge1 - edge0), 0.0, 1.0) - 0.5;
return 1.14191 * t - 0.83570 * t * t * t;
}
@pcwalton
pcwalton / layout-types.rs
Last active February 14, 2019 20:56
struct LayoutObjectRef<T>(Arc<RwLock<LayoutObject<T>>>);
struct LayoutObject<T> {
style: Arc<ComputedValues>,
// position? borders? padding? margins?
contents: T,
}
struct BlockFormattingContext(BlockOrInline);
@pcwalton
pcwalton / webrender-benefits.md
Created January 17, 2019 00:18
WebRender benefits

WebRender benefits

Fundamentally, WebRender is designed to render CSS with better performance on modern hardware than what the traditional combination of a legacy painting API like Skia and a compositor can offer. It does so by merging the painting and compositing steps together into a single API, avoiding the performance pitfalls associated with CSS properties that don't run on the compositor. Instead of an immediate mode API in which objects are rendered back-to-front, WebRender uses a retained mode API that can render objects in any order. Ultimately, WebRender works more like a game engine than a legacy PostScript-like 2D API, which is

@pcwalton
pcwalton / ugly-wip-ca-patch.diff
Created September 11, 2018 22:35
ugly-wip-ca-patch.diff
diff --git a/.hgignore b/.hgignore
--- a/.hgignore
+++ b/.hgignore
@@ -188,3 +188,7 @@ subinclude:servo/.hgignore
^testing/raptor/raptor-venv
^testing/raptor/raptor/tests/.*.json
^testing/raptor/webext/raptor/auto_gen_test_config.js
+
+^wr-capture
+wr-record.*\.bin
@pcwalton
pcwalton / cube.html
Created May 15, 2018 21:26
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Monument</title>
<style>
/*@keyframes spin {
from { transform: rotateY(0) scale(10); }
to { transform: rotateY(360deg) scale(30); }
@pcwalton
pcwalton / stencil-aaa.fs.glsl
Created March 14, 2018 03:21
// pathfinder/shaders/gles2/stencil-aaa.fs.glsl
//
// Copyright (c) 2018 The Pathfinder Project Developers.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
@pcwalton
pcwalton / ellipse-test.html
Created February 14, 2018 21:05
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
body {
position: absolute;
top: 0;
left: 0;