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aseprite/INSTALL.md
David Capello 160209cb25 Fix flags to compile Skia on macOS which fixes exception handling 
On Clang/macOS we cannot mix projects compiled with -fno-rtti that use
std::__throw_bad_weak_ptr() function and expect to catch
std::runtime_error as an std::exception in our project (compiled with
-frtti).

Real fix to crash in c59f03a7a0 and other
crash like moving a layer below to the background, and maybe a lot of
other cases where exceptions are used.

Example of this bug: https://gist.github.com/dacap/7ddffbe401eb42620de397e47edfcc76
2018-04-28 11:58:34 -03:00

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Table of contents

Platforms

You should be able to compile Aseprite successfully on the following platforms:

  • Windows 10 + VS2015 or VS2017 Community Edition + Windows 10 SDK
  • macOS 10.12.6 Sierra + Xcode 9.0 + macOS 10.13 SDK + Skia
  • Linux + gcc 4.8 with some C++11 support

Get the source code

You can get the source code downloading a Aseprite-v1.x-Source.zip file from the latest Aseprite release:

https://github.com/aseprite/aseprite/releases

Or you can clone the repository and all its submodules using the following command:

git clone --recursive https://github.com/aseprite/aseprite.git

To update an existing clone you can use the following commands:

cd aseprite
git pull
git submodule update --init --recursive

You can use Git for Windows to clone the repository on Windows.

Dependencies

To compile Aseprite you will need:

  • The latest version of CMake (3.4 or greater)
  • Ninja build system

Aseprite can be compiled with two different back-ends:

  1. Allegro back-end (Windows, Linux): You will not need any extra library because the repository already contains a modified version of the Allegro library. This back-end is deprecated and will be removed in future versions. All new development is being done in the new Skia back-end.

  2. Skia back-end (Windows, macOS): You will need a compiled version of the Skia library. Please check the details about how to build Skia on your platform.

Windows dependencies

First of all, you will need:

  • Windows 10 (we don't support cross-compiling and don't know if this would be possible)
  • Visual Studio Community Edition (VS2015 or VS2017)
  • Windows 10 SDK (it's included with the Visual Studio installer, remember to install it)

Then, you will need an extra little utility: awk, used to compile the libpng library. You can get this utility from MSYS2 distributions like MozillaBuild.

After that you have to choose the back-end:

  1. If you choose the Allegro back-end, you can jump directly to the Compiling section.

  2. If you choose the Skia back-end, you will need to compile Skia before and then continue in the Compiling section. Remember to check the Windows details section to know how to call cmake correctly.

The official version of Aseprite is compiled with the Skia back-end.

macOS dependencies

On macOS you will need macOS 10.12 SDK and Xcode 8.0 (older versions might work).

Also, you must compile Skia before starting with the compilation.

Linux dependencies

You will need the following dependencies (Ubuntu, Debian):

sudo apt-get update -qq
sudo apt-get install -y g++ libx11-dev libxcursor-dev cmake ninja-build

The libxcursor-dev package is needed to hide the hardware cursor.

Compiling

  1. Get Aseprite code, put it in a folder like C:\aseprite, and create a build directory inside to leave all the files that are result of the compilation process (.exe, .lib, .obj, .a, .o, etc).

     cd C:\aseprite
 mkdir build

    In this way, if you want to start with a fresh copy of Aseprite source code, you can remove the build directory and start again.

  2. Enter in the new directory and execute cmake:

     cd C:\aseprite\build
 cmake -G Ninja ..

    Here cmake needs different options depending on your platform. You must check the details for Windows, macOS, and Linux. Some cmake options can be modified using tools like ccmake or cmake-gui.

  3. After you have executed and configured cmake, you have to compile the project:

     cd C:\aseprite\build
 ninja aseprite

  4. When ninja finishes the compilation, you can find the executable inside C:\aseprite\build\bin\aseprite.exe.

Windows details

To choose the Skia back-end (after you've compiled Skia) you can execute cmake with the following arguments:

cd aseprite
mkdir build
cd build
cmake -DUSE_ALLEG4_BACKEND=OFF -DUSE_SKIA_BACKEND=ON -DSKIA_DIR=C:\deps\skia -G Ninja ..
ninja aseprite

In this case, C:\deps\skia is the directory where Skia was compiled as described in Skia on Windows section.

macOS details

After compiling Skia, you should run cmake with the following parameters and then ninja:

cd aseprite
mkdir build
cd build
cmake \
  -DCMAKE_OSX_ARCHITECTURES=x86_64 \
  -DCMAKE_OSX_DEPLOYMENT_TARGET=10.7 \
  -DCMAKE_OSX_SYSROOT=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk \
  -DUSE_ALLEG4_BACKEND=OFF \
  -DUSE_SKIA_BACKEND=ON \
  -DSKIA_DIR=$HOME/deps/skia \
  -DWITH_HarfBuzz=OFF \
  -G Ninja \
  ..
ninja aseprite

In this case, $HOME/deps/skia is the directory where Skia was compiled as described in Skia on macOS section.

Issues with Retina displays

If you have a Retina display, check the following issue:

https://github.com/aseprite/aseprite/issues/589

Linux details

On Linux you can specify a specific directory to install Aseprite after a ninja install command. For example:

cd aseprite
mkdir build
cd build
cmake -DCMAKE_INSTALL_PREFIX=~/software -G Ninja ..
ninja aseprite

Then, you can invoke ninja install and it will copy the program in the given location (e.g. ~/software/bin/aseprite on Linux).

Using shared third party libraries

If you don't want to use the embedded code of third party libraries (i.e. to use your installed versions), you can disable static linking configuring each USE_SHARED_ option.

After running cmake -G, you can edit build/CMakeCache.txt file, and enable the USE_SHARED_ flag (set its value to ON) of the library that you want to be linked dynamically.

Linux issues

If you use the official version of Allegro 4.4 library (i.e. you compile with USE_SHARED_ALLEGRO4=ON) you will experience a couple of known issues solved in our patched version of Allegro 4.4 library:

Building Skia dependency

When you compile Aseprite with Skia as back-end on Windows or macOS, you need to compile a specific version of Skia. In the following sections you will find straightforward steps to compile Skia.

You can always check the official Skia instructions and select the OS you are building for. Aseprite uses the aseprite-m67 Skia branch from https://github.com/aseprite/skia.

Skia on Windows

Download Google depot tools and uncompress it in some place like C:\deps\depot_tools.

Then open a command line follow these steps:

For VS2015:

call "%VS140COMNTOOLS%\vsvars32.bat"

For VS2017:

call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\Tools\VsDevCmd.bat"

Then:

set PATH=C:\deps\depot_tools;%PATH%
cd C:\deps\depot_tools
gclient sync

(The gclient command might print an error like Error: client not configured; see 'gclient config'. Just ignore it.)

cd C:\deps
git clone https://github.com/aseprite/skia.git
cd skia
git checkout aseprite-m67
python tools/git-sync-deps

(The tools/git-sync-deps will take some minutes because it downloads a lot of packages, please wait and re-run the same command in case it fails.)

For VS2015:

gn gen out/Release --args="is_official_build=true skia_use_system_expat=false skia_use_system_libjpeg_turbo=false skia_use_system_libpng=false skia_use_system_libwebp=false skia_use_system_zlib=false target_cpu=""x86"""
ninja -C out/Release

For VS2017:

gn gen out/Release --args="is_official_build=true skia_use_system_expat=false skia_use_system_libjpeg_turbo=false skia_use_system_libpng=false skia_use_system_libwebp=false skia_use_system_zlib=false target_cpu=""x86"" msvc=2017"
ninja -C out/Release

More information about these steps in the official Skia documentation.

Skia on macOS

These steps will create a deps folder in your home directory with a couple of subdirectories needed to build Skia (you can change the $HOME/deps with other directory). Some of these commands will take several minutes to finish:

mkdir $HOME/deps
cd $HOME/deps
git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
git clone https://github.com/aseprite/skia.git
export PATH="${PWD}/depot_tools:${PATH}"
cd skia
git checkout aseprite-m67
python tools/git-sync-deps
gn gen out/Release --args="is_official_build=true skia_use_system_expat=false skia_use_system_icu=false skia_use_system_libjpeg_turbo=false skia_use_system_libpng=false skia_use_system_libwebp=false skia_use_system_zlib=false extra_cflags_cc=[\"-frtti\"]"
ninja -C out/Release

After this you should have all Skia libraries compiled. When you compile Aseprite, remember to add -DSKIA_DIR=$HOME/deps/skia parameter to your cmake call as described in the macOS details section.

More information about these steps in the official Skia documentation.