diff --git a/docs/README-raspberrypi.md b/docs/README-raspberrypi.md index 5e23ad5e0..556b9f8d1 100644 --- a/docs/README-raspberrypi.md +++ b/docs/README-raspberrypi.md @@ -1,13 +1,12 @@ Raspberry Pi -================================================================================ +============ Requirements: Raspbian (other Linux distros may work as well). -================================================================================ - Features -================================================================================ +Features +-------- * Works without X11 * Hardware accelerated OpenGL ES 2.x @@ -16,9 +15,8 @@ Raspbian (other Linux distros may work as well). * Hotplugging of input devices via UDEV -================================================================================ - Raspbian Build Dependencies -================================================================================ +Raspbian Build Dependencies +--------------------------- sudo apt-get install libudev-dev libasound2-dev libdbus-1-dev @@ -28,18 +26,17 @@ OpenGL ES 2.x, it usually comes pre-installed, but in any case: sudo apt-get install libraspberrypi0 libraspberrypi-bin libraspberrypi-dev -================================================================================ - NEON -================================================================================ +NEON +---- If your Pi has NEON support, make sure you add -mfpu=neon to your CFLAGS so that SDL will select some otherwise-disabled highly-optimized code. The original Pi units don't have NEON, the Pi2 probably does, and the Pi3 definitely does. -================================================================================ - Cross compiling from x86 Linux -================================================================================ + +Cross compiling from x86 Linux +------------------------------ To cross compile SDL for Raspbian from your desktop machine, you'll need a Raspbian system root and the cross compilation tools. We'll assume these tools @@ -92,9 +89,8 @@ To be able to deploy this to /usr/local in the Raspbian system you need to fix u perl -w -pi -e "s#$PWD/rpi-sdl2-installed#/usr/local#g;" ./rpi-sdl2-installed/lib/libSDL2.la ./rpi-sdl2-installed/lib/pkgconfig/sdl2.pc ./rpi-sdl2-installed/bin/sdl2-config -================================================================================ - Apps don't work or poor video/audio performance -================================================================================ +Apps don't work or poor video/audio performance +----------------------------------------------- If you get sound problems, buffer underruns, etc, run "sudo rpi-update" to update the RPi's firmware. Note that doing so will fix these problems, but it @@ -108,17 +104,15 @@ See here how to configure this setting: http://elinux.org/RPiconfig Using a fixed gpu_mem=128 is the best option (specially if you updated the firmware, using CMA probably won't work, at least it's the current case). -================================================================================ - No input -================================================================================ +No input +-------- Make sure you belong to the "input" group. sudo usermod -aG input `whoami` -================================================================================ - No HDMI Audio -================================================================================ +No HDMI Audio +------------- If you notice that ALSA works but there's no audio over HDMI, try adding: @@ -128,9 +122,8 @@ to your config.txt file and reboot. Reference: http://www.raspberrypi.org/phpBB3/viewtopic.php?t=5062 -================================================================================ - Text Input API support -================================================================================ +Text Input API support +---------------------- The Text Input API is supported, with translation of scan codes done via the kernel symbol tables. For this to work, SDL needs access to a valid console. @@ -160,9 +153,9 @@ this determining the CAPS LOCK behavior: sudo dpkg-reconfigure locales -================================================================================ - OpenGL problems -================================================================================ + +OpenGL problems +--------------- If you have desktop OpenGL headers installed at build time in your RPi or cross compilation environment, support for it will be built in. However, the chipset @@ -177,9 +170,8 @@ environment variable: export SDL_RENDER_DRIVER=opengles2 -================================================================================ - Notes -================================================================================ +Notes +----- * When launching apps remotely (via SSH), SDL can prevent local keystrokes from leaking into the console only if it has root privileges. Launching apps locally