Graphics » History » Version 14
doak complex, 01/23/2020 08:10 PM
Changed formatting: all names cursive
1 | 1 | Wolfgang Wiedmeyer | h1. Graphics |
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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 | Make sure [[ADB]] is running as root and the system partition [[ADB#Modifying-the-system-partition|is mounted writable]]. |
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11 | The following command switches the software renderer implementation: |
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12 | <pre> |
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13 | 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" |
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14 | </pre> |
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16 | 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. |
17 | 6 | Jeremy Rand | |
18 | 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_. |
19 | 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. |
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20 | 2 | Wolfgang Wiedmeyer | |
21 | 14 | doak complex | h2. Known issues with the _Android software renderer_ |
22 | 1 | Wolfgang Wiedmeyer | |
23 | 14 | doak complex | * Selecting the third option besides photo and video (_Panorama mode_) will crash the _Camera_ app. |
24 | * Video playback in the browser does not work. (issue #1533) |
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25 | * Screenshots do not work. (see [[Screenshots]] for a workaround) |
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26 | * Selecting wallpapers from storage does not work. |
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27 | * Screen content is sometimes shortly visible before unlocking. (issue #1275, happens with _llvmpipe_ as well) |
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28 | * Previews of the windows in the tasks switcher are missing. |
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29 | * Switching between apps, apps and the launcher or different views inside an app is sometimes slow and the device may seem unresponsive. |
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30 | * There are issues with using folders with the _Trebuchet launcher_. (issue #1790, happens with _llvmpipe_ as well) |
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31 | 1 | Wolfgang Wiedmeyer | |
32 | 14 | doak complex | h3. Popular apps from _F-Droid_ that do not work |
33 | 2 | Wolfgang Wiedmeyer | |
34 | 14 | doak complex | * All _Firefox_-based browsers like "_IceCatMobile_":https://f-droid.org/repository/browse/?fdfilter=icecat&fdid=org.gnu.icecat and _Orfox_ |
35 | * "_Document Viewer_":https://f-droid.org/repository/browse/?fdfilter=document+viewer&fdid=org.sufficientlysecure.viewer |
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36 | * "_LibreOffice Viewer_":https://f-droid.org/repository/browse/?fdfilter=libreoffice&fdid=org.documentfoundation.libreoffice |
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37 | * "_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) |
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38 | 8 | Denis 'GNUtoo' Carikli | |
39 | h2. See also |
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40 | 9 | Denis 'GNUtoo' Carikli | |
41 | 14 | doak complex | * There is a page about [[GraphicsResearch]] that gather information to improve graphics support. |