a4a9a46a87
first-class.
This implements the scheme described here:
https://groups.google.com/forum/#!topic/mozilla.dev.servo/sZVPSfPVfkg
This commit changes Servo to generate one display list per stacking
context instead of one display list per layer. This is purely a
refactoring; there are no functional changes. Performance is essentially
the same as before. However, there should be numerous future benefits
that this is intended to allow for:
* It makes the code simpler to understand because the "new layer needed"
vs. "no new layer needed" code paths are more consolidated.
* It makes it easy to support CSS properties that did not fit into our
previous flat display list model (without unconditionally layerizing
them):
o `opacity` should be easy to support because the stacking context
provides the higher-level grouping of display items to which opacity
is to be applied.
o `transform` can be easily supported because the stacking context
provides a place to stash the transformation matrix. This has the side
benefit of nicely separating the transformation matrix from the
clipping regions.
* The `flatten` logic is now O(1) instead of O(n) and now only needs to
be invoked for pseudo-stacking contexts (right now: just floats),
instead of for every stacking context.
* Layers are now a proper tree instead of a flat list as far as layout
is concerned, bringing us closer to a production-quality
compositing/layers framework.
* This commit opens the door to incremental display list construction at
the level of stacking contexts.
Future performance improvements could come from optimizing allocation of
display list items, and, of course, incremental display list
construction.
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| .cargo | ||
| components | ||
| etc | ||
| ports | ||
| python | ||
| resources | ||
| src | ||
| support/rust-task_info | ||
| tests | ||
| .gitignore | ||
| .gitmodules | ||
| cargo-nightly-build | ||
| Cargo.lock | ||
| Cargo.toml | ||
| CONTRIBUTING.md | ||
| Info.plist | ||
| LICENSE | ||
| mach | ||
| ORGANIZATION.md | ||
| README.md | ||
| rust-snapshot-hash | ||
| servobuild.example | ||
The Servo Parallel Browser Project
Servo is a prototype web browser engine written in the Rust language. It is currently developed on 64bit OS X, 64bit Linux, and Android.
Servo welcomes contribution from everyone. See
CONTRIBUTING.md for help getting started.
Prerequisites
Note, on systems without glfw3 packages, you can compile from source. An example can be found in the TravisCI install script.
On OS X (homebrew):
brew install automake pkg-config python glfw3 cmake
pip install virtualenv
On OS X (MacPorts):
sudo port install python27 py27-virtualenv cmake
On Debian-based Linuxes:
sudo apt-get install curl freeglut3-dev \
libfreetype6-dev libgl1-mesa-dri libglib2.0-dev xorg-dev \
msttcorefonts gperf g++ cmake python-virtualenv \
libssl-dev libglfw-dev
On Fedora:
sudo yum install curl freeglut-devel libtool gcc-c++ libXi-devel \
freetype-devel mesa-libGL-devel glib2-devel libX11-devel libXrandr-devel gperf \
fontconfig-devel cabextract ttmkfdir python python-virtualenv expat-devel \
rpm-build openssl-devel glfw-devel cmake
pushd .
cd /tmp
wget http://corefonts.sourceforge.net/msttcorefonts-2.5-1.spec
rpmbuild -bb msttcorefonts-2.5-1.spec
sudo yum install $HOME/rpmbuild/RPMS/noarch/msttcorefonts-2.5-1.noarch.rpm
popd
On Arch Linux:
sudo pacman -S base-devel git python2 python2-virtualenv mesa glfw ttf-font cmake
Cross-compilation for Android:
Pre-installed Android tools are needed. See wiki for details
The Rust compiler
Servo uses a snapshot Rust compiler to build itself. This is normally a
specific revision of Rust upstream, but sometimes has a backported patch or
two. If you'd like to know the snapshot revision of Rust which we use, see
./rust-snapshot-hash.
Building
Servo is built with Cargo, the Rust package manager. We also use Mozilla's Mach tools to orchestrate the build and other tasks.
Normal build
git clone https://github.com/servo/servo
cd servo
./mach build
./mach run tests/html/about-mozilla.html
Building for Android target
git clone https://github.com/servo/servo
cd servo
ANDROID_TOOLCHAIN=/path/to/toolchain ANDROID_NDK=/path/to/ndk PATH=$PATH:/path/to/toolchain/bin ./mach build --android
cd ports/android
ANDROID_SDK=/path/to/sdk make install
Rather than setting the ANDROID_* environment variables every time, you can
also create a .servobuild file and then edit it to contain the correct paths
to the Android SDK/NDK tools:
cp servobuild.example .servobuild
# edit .servobuild
Running
Commandline Arguments
-p INTERVALturns on the profiler and dumps info to the console everyINTERVALseconds-s SIZEsets the tile size for rendering; defaults to 512-zdisables all graphical output; useful for running JS / layout tests
Keyboard Shortcuts
Ctrl-Lopens a dialog to browse to a new URL (Mac only currently)Ctrl--zooms outCtrl-=zooms inBackspacegoes backwards in the historyShift-Backspacegoes forwards in the historyEscexits servo
Developing
There are lots of mach commands you can use. You can list them with ./mach --help.