FlipClock

A flip clock screensaver supported by SDL2.

Project Website

Notice

I added multi-display support to this program, but adding/removing monitors while program is running is not supported, and you should not do this.

If you run this program in windowed mode (-w), only one display is supported. Multi-display is only supported in fullscreen mode.

Installation

Distribution Package (Recommended)

Arch Linux

Install From AUR

You can get PKGBUILD from FlipClock's AUR page and build it manually, or use some AUR helpers.

$ paru flipclock

Install From archlinuxcn Repo

First add archlinuxcn repo to your system, then use pacman to install it.

# pacman -S flipclock

Flatpak

FlipClock is also available as Flatpak on Flathub, you can get it from FlipClock's Flathub page, or using flatpak CLI tool.

# flatpak install flathub one.alynx.FlipClock && flatpak run one.alynx.FlipClock

Other Linux Distributions

Please help package FlipClock to your distribution!

Windows

Just download file with win in its name from release page, extract it and right click flipclock.scr to install it as a screensaver. Please note I may not have time to build every version for Windows, just pick the latest available one.

Build From Source

Linux

With Meson (Recommended)

1. Install a C compiler, Meson, Ninja, libc, libm, SDL2 and SDL2_ttf.
2. mkdir build && cd build && meson setup . .. && meson compile
3. ./flipclock -f ../dists/flipclock.ttf
4. If you want to install this to your system, it is suggested to build with mkdir build && cd build && meson setup --prefix=/usr --buildtype=release . .. && meson compile && sudo meson install.

Windows

NOTICE: I saw a windows user says "This program has dlls in its folder so it's not simple!" and I got angry. Anyone who knows something about compiling, linking and loading won't complain. It might be quite hard for some Windows users to understand how complicated building static libraries is and what dynamically libraries are. Windows is a horrible platform for developers: no package manager for easy distribution, slowly visual studio, complicated tool chains. But thanks to Meson which handles all dirty things for me, it's SDL2 wrap works now and I managed to tweak it to build a static linked program automatically if no pre-built dependency found.

With Meson (Recommended)

1. Install Meson, Ninja, Visual Studio.
2. Create a prefix directory, for example d:/flipclock-prefix, program files will be installed into it.
3. Open x64 Native Tools Command Prompt for VS 2019 from Start Menu, or other architectures you need.
4. Change dir to where you put this project. Run mkdir build && cd build && meson setup --prefix=d:/flipclock-prefix --buildtype=release . .. && meson compile && meson install. You can change prefix argument to other path you created in Step 2, but you need to use UNIX style slash instead of backslash because it's escape character in C.
5. Go to flipclock dir under your prefix directory, you can now find flipclock.scr and right click it to install it as a screensaver.

Android

See flipclock-android. It may be obsolete because I don't have enough time to update the Android wrapper.

Configuration

On Linux, program will first use $XDG_CONFIG_HOME/flipclock.conf, if XDG_CONFIG_HOME is not set or file does not exist, it will use $HOME/.config/flipclock.conf. If per-user configuration file does not exist, it will use /etc/flipclock.conf or flipclock.conf under sysconfdir you choosed while building.

On Windows, program will use flipclock.conf under the same directory as program.

flipclock.conf should be installed with the binary by Meson.

Contribution

If you want some features and you can implement it, a PR is always welcome, but there are some rules or personal habits:

• If you are writing multi-line comment, please use the same style with existing comments. Comments should always occupy a new line. If your comment is longer than Column 80, break it into block comment with /* */ (but don't break long URL, it's fine), don't use // for block comment.
• You can use all C11 features freely.
• Try to use C standard functions first, until you are implementing some platform-dependent features that libc does not support. Do use preprocessor (_WIN32, __ANDROID__ and __linux__) for platform-dependent code. (Note: Android will also define __linux__, so if you are targeting traditional Linux distributions, please use defined(__linux__) && !defined(__ANDROID__).)
• Use RETURN_IF_FAIL(EXPR) or RETURN_VAL_IF_FAIL(EXPR, VAL) from flipclock.h to check arguments for newly added functions.
• Try not to pull new dependencies into project other than SDL2 and SDL2_ttf, it's too brain damage to add dependency when building on Windows, building on this platform is a disaster and packaging on this platform is a mistery.
• When you are coding please use Linux kernel coding style. There is a .clang-format for this project, please run clang-format yourself before committing something. It will keep most coding style consistent.
• There are still some coding style clang-format cannot change, please keep the same as existing code. For example, add period for all comments and printed text, add \n yourself for logging.
• Prefer to ++i, except when you really need i before increasement.
• I prefer to write commit message in past tense, capitalize the first character and add period. For example "Added new feature.", "Updated README.md.".
• If you added new options to configuration file and you are able to write Chinese, please also update dists/请先读我.txt. This file is a README for Chinese Windows users and should use GB2312 as encoding and CRLF as return.

License

Apache-2.0