Graphics » History » Version 15
doak complex, 01/23/2020 08:31 PM
Add todos for adding information how to switch rendering solution
1 | 1 | Wolfgang Wiedmeyer | h1. Graphics |
---|---|---|---|
2 | |||
3 | 14 | doak complex | By default, _Replicant_ devices use the _Android software renderer_, which relies on the CPU for graphics rendering. Using the dedicated graphics processor (GPU) currently requires non-free software on all of the supported devices. As free-software replacements are not yet available, the GPU cannot be used with _Replicant_ for the moment (see [[GraphicsResearch]]). The software rendering is the reason why _Replicant_ devices appear slow at times and is responsible for a lot of crashes that can happen during usage. |
4 | 11 | Fil Bergamo | |
5 | 14 | doak complex | _llvmpipe_ has more complete EGL support than the _Android software renderer_ (see #705), so more apps work with it, like _Firefox_-based browsers or more recent _webviews_ (see #1780). Unfortunately, _llvmpipe_ is still too slow to be the default renderer, but it is possible to switch back and forth between _llvmpipe_ and the _Android software renderer_. |
6 | 1 | Wolfgang Wiedmeyer | |
7 | 13 | doak complex | h2. Enabling _llvmpipe_ as software renderer |
8 | 1 | Wolfgang Wiedmeyer | |
9 | 15 | doak complex | TODO: The following enables it globally. Add information about scripts to switch only "non-system"-components (_SurfaceFlinger_, _bootanimation_, _system server_ ?) to _llvmpipe_. |
10 | TODO: Also add information which files are used for this (@/etc/libGLES_android@ and other files within @/data/data/<app>@). Refer to "this mail":https://lists.osuosl.org/pipermail/replicant/2019-August/002054.html. |
||
11 | |||
12 | 1 | Wolfgang Wiedmeyer | Make sure [[ADB]] is running as root and the system partition [[ADB#Modifying-the-system-partition|is mounted writable]]. |
13 | |||
14 | The following command switches the software renderer implementation: |
||
15 | <pre> |
||
16 | adb shell "grep -q "ro.libagl=1" /system/build.prop && sed "s/ro.libagl=1/ro.libagl=0/" -i /system/build.prop || sed "s/ro.libagl=0/ro.libagl=1/" -i /system/build.prop" |
||
17 | </pre> |
||
18 | |||
19 | 14 | doak complex | Then reboot the device. _llvmpipe_ should now be enabled. To switch back to the default _Android software renderer_, run the above command again and reboot the device. |
20 | 6 | Jeremy Rand | |
21 | 13 | doak complex | There are also issues with certain apps when using _llvmpipe_, although crashes should be less frequent. Usually, the screen stays black if an app does not work with _llvmpipe_. |
22 | In case the screen compositor (_SurfaceFlinger_) is used with _llvmpipe_, this could have an effect to other apps. For instance with _Gallery_ and _Orbot_ it happens, that some GUI elements are visible, while the main screen is black. The GUI of _Simple File Manager_ works as long as no image is viewed in fullscreen. |
||
23 | 2 | Wolfgang Wiedmeyer | |
24 | 14 | doak complex | h2. Known issues with the _Android software renderer_ |
25 | 1 | Wolfgang Wiedmeyer | |
26 | 14 | doak complex | * Selecting the third option besides photo and video (_Panorama mode_) will crash the _Camera_ app. |
27 | * Video playback in the browser does not work. (issue #1533) |
||
28 | * Screenshots do not work. (see [[Screenshots]] for a workaround) |
||
29 | * Selecting wallpapers from storage does not work. |
||
30 | * Screen content is sometimes shortly visible before unlocking. (issue #1275, happens with _llvmpipe_ as well) |
||
31 | * Previews of the windows in the tasks switcher are missing. |
||
32 | * Switching between apps, apps and the launcher or different views inside an app is sometimes slow and the device may seem unresponsive. |
||
33 | * There are issues with using folders with the _Trebuchet launcher_. (issue #1790, happens with _llvmpipe_ as well) |
||
34 | 1 | Wolfgang Wiedmeyer | |
35 | 14 | doak complex | h3. Popular apps from _F-Droid_ that do not work |
36 | 2 | Wolfgang Wiedmeyer | |
37 | 14 | doak complex | * All _Firefox_-based browsers like "_IceCatMobile_":https://f-droid.org/repository/browse/?fdfilter=icecat&fdid=org.gnu.icecat and _Orfox_ |
38 | * "_Document Viewer_":https://f-droid.org/repository/browse/?fdfilter=document+viewer&fdid=org.sufficientlysecure.viewer |
||
39 | * "_LibreOffice Viewer_":https://f-droid.org/repository/browse/?fdfilter=libreoffice&fdid=org.documentfoundation.libreoffice |
||
40 | * "_RedReader_":https://f-droid.org/repository/browse/?fdfilter=redreader&fdid=org.quantumbadger.redreader cannot display images ("upstream bug":https://github.com/QuantumBadger/RedReader/issues/279) |
||
41 | 8 | Denis 'GNUtoo' Carikli | |
42 | h2. See also |
||
43 | 9 | Denis 'GNUtoo' Carikli | |
44 | 14 | doak complex | * There is a page about [[GraphicsResearch]] that gather information to improve graphics support. |