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ScummVM-RASPBERRYPI README
==============================================================================
Notes
============
This version of ScummVM is specially tailored to use DispmanX, the native 2D
API on the Raspberry Pi. The idea is that scaling and drawing on a double
buffer with a non-blocking vsync wait is all done using the on-board VideoCore
hardware, thus using only a small fraction of the CPU ScummVM uses when ran
on a clunky, software-scaled and desynced X11 environment using the X11 API.
Thus, running this version under an X11 session is not supported.
Requirements
============
- Raspberry Pi 1 or 2 microcomputer.
- Raspbian (Debian) installed on SD card. Other distros may be supported if
they include the VideoCore runtime libraries that Raspbian includes.
-An attached keyboard and mouse, or alternatively joystick.
Controls
============
The standard ScummVM keyboard and mouse controls are used as in any other
GNU/Linux based system.
Use the --joystick parameter if you want to use a joystick instead of the
intended mouse for playing the games (not recommended).
Installation from binaries
==============================
We have at least three methods to get the binaries into the Raspbian SD:
1) Since Debian (Raspbian) includes an ssh service by default, I recommend
keeping the SD card on the Raspberry Pi, and using scp to copy the package over
to your home directory in the Debian filesystem.
scp scummvm-rpi_<version>.zip pi@<raspberrypi_ip>:/home/pi
2) If your RaspberryPi has internet access, you can simply use wget to
download the package to your home folder:
cd ~/
wget <package_link>
3) You could also connect the Raspbian SD card to your main PC and, after
mounting it (or being automounted as it would be in most desktop GNU/Linux
systems), copy the package file manually to your home directory.
How to mount an SD and copy files to it is beyond the scope of this README.
Once we have the package file in our home directory using one of the three
aforementioned methods, we would need to uncompress it:
unzip scummvm-rpi_<version>.zip
As a result, a directory containing the scummvm along with this README will be
created.
We can run it by simply changing to our scummvm directory and executing the
scummvm file.
cd scummvm-rpi
./scummvm
I recommend copying the games to /home/pi/scummvm-rpi. Adding the games via the menu
works as in any other system ScummVM runs on.
Building from sources
==============================
We have two options to build once we have the sources in our main GNU/Linux desktop
class PC or in our Raspberry Pi:
1) Building on the Raspberry Pi itself, although possible, is an SLOW task for the
little computer unless you use distributed gcc (or distcc for short).
Local compilation would simply consist of the "standard" GNU/Linux building process:
cd <sources_dir>
./configure --backend=raspberrypi -disable-debug --enable-release
--enable-optimizations --disable-mt32emu --disable-flac --disable-mad --disable-vorbis
--disable-tremor --disable-fluidsynth --disable-taskbar --disable-timidity --disable-alsa
make
¡¡It will be an SLOW process, taking several hours to complete, unless you
are running distcc against a fast compilation server!!
2) If we want to build by cross-compiling on a GNU/Linux X86-based computer,
we can find concise instructions for this can be found on the ScummVM wiki:
http://wiki.scummvm.org/index.php/Compiling_ScummVM/RPI
NOTE: Distcc is my preferred method as it does cross-compiling totally transparent
(we build ON the Pi but the actual CPU-intensive compilation is made on an external
server), but it involves building a custom gcc version on the compilation server and
configuring a server and client in both the Raspberry Pi and the server.
More info here: http://elinux.org/RPi_Linaro_GCC_Compilation#Build_GCC_Linaro
Enjoy!
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