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4b585e75
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2020-02-03T08:06:52
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Fixed bug 4833 - Use EGL for X11?
Martin Fiedler
To be precise, this is about *desktop OpenGL* on X11. For OpenGL ES, EGL is already used (as it's the only way to get an OpenGL ES context), as Sylvain noted above.
To shine some light on why this is needed:
In 99% of all cases, using GLX on X11 is fine, even though it's effectively deprecated in favor of EGL [1]. However, there's at least one use case that *requires* the OpenGL context being created with EGL instead of GLX, and that's DRM_PRIME interoperability: The function glEGLImageTargetTexture2DOES simply doesn't work with GLX. (Currently, Mesa actually crashes when trying that.)
Some example code:
https://gist.github.com/kajott/d1b29c613be30893c855621edd1f212e
Runs on Intel and open-source AMD drivers just fine (others unconfirmed), but with #define USE_EGL 0 (i.e. forcing it to GLX), it crashes. The same happens when using SDL for window and context creation.
The good news is that most of the pieces for EGL support on X11 are already in place: SDL_egl.c is pretty complete (and used for desktop OpenGL on Wayland, for example), and SDL_x11opengl.c has the aforementioned OpenGL-ES-on-EGL support. However, when it comes to desktop OpenGL, it's hardcoded to fall back to GLX.
I'm not advocating to make EGL the default for desktop OpenGL on X11; don't fix what ain't broken. But something like an SDL_HINT_VIDEO_X11_FORCE_EGL would be very appreciated to make use cases like the above work with SDL.
[1] source: Eric Anholt, major Linux graphics stack developer, 7 years ago already - see last paragraph of https://www.phoronix.com/scan.php?page=news_item&px=MTE3MTI
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a8780c6a
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2020-01-16T20:49:25
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Updated copyright date for 2020
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5e13087b
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2019-01-04T22:01:14
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Updated copyright for 2019
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e3cc5b2c
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2018-01-03T10:03:25
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Updated copyright for 2018
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56363ebf
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2017-08-02T10:22:48
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Fixed bug 3690 - SDL2 KMS/DRM render context support
Manuel
The attached patch adds support for KMS/DRM context graphics.
It builds with no problem on X86_64 GNU/Linux systems, provided the needed libraries are present, and on ARM GNU/Linux systems that have KMS/DRM support and a GLES2 implementation.
Tested on Raspberry Pi: KMS/DRM is what the Raspberry Pi will use as default in the near future, once the propietary DispmanX API by Broadcom is overtaken by open graphics stack, it's possible to boot current Raspbian system in KMS mode by adding "dtoverlay=vc4-kms-v3d" to config.txt on Raspbian's boot partition.
X86 systems use KMS right away in every current GNU/Linux system.
Simple build instructions:
$./autogen.sh
$./configure --enable-video-kmsdrm
$make
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45b774e3
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2017-01-01T18:33:28
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Updated copyright for 2017
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42065e78
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2016-01-02T10:10:34
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Updated copyright to 2016
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0e45984f
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2015-06-21T17:33:46
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Fixed crash if initialization of EGL failed but was tried again later.
The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly
uninitialized data structure if loading the library first failed. A later try to
use EGL then skipped initialization and assumed it was previously successful
because the data structure now already existed. This led to at least one crash
in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was
dereferenced to make a call to eglBindAPI().
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2c4a6ea0
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2015-05-26T06:27:46
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Updated the copyright year to 2015
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b72938c8
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2015-04-20T12:22:44
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Windows: Always set the system timer resolution to 1ms by default.
An existing hint lets apps that don't need the timer resolution changed avoid
this, to save battery, etc, but this fixes several problems in timing, audio
callbacks not firing fast enough, etc.
Fixes Bugzilla #2944.
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fe6c797c
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2015-04-10T23:30:31
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Fixed an iOS view orientation issue when SDL_GL_CreateContext or SDL_CreateRenderer is called.
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b88ca1b4
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2015-02-10T16:28:56
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the last parameter of XChangeProperty is the number of elements.. and when the element format is 32.. the element is "long" so we have 5 long elements here.
Yes this seems confusing as on mac+linux Long is either 32 or 64bits depending on the architecture, but this is how the X11 protocol is defined. Thus 5 is the correct value for the nelts here. Not 5 or 10 depending on the architecture.
More info on the confusion https://bugs.freedesktop.org/show_bug.cgi?id=16802
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b48e54aa
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2015-01-26T22:00:29
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Fixed bug 2802 - [patch] Fix android build compiling in wrong filesystem implementation
Jonas Kulla
The configure script didn't differentiate between Linux and Android, unconditionally compiling in the unix implementation of SDL_sysfilesystem.c.
I'm probably one of the very few people building SDL for android using classic configure + standalone toolchain, so this has gone undetected all along.
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70438be2
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2014-12-03T10:55:23
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WinRT: fixed bug whereby SDL would override an app's default orientation
WinRT apps can set a default, preferred orientation via a .appxmanifest file.
SDL was overriding this on app startup, and making the app use all possible
orientations (landscape and portrait).
Thanks to Eric Wing for the heads up on this!
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9c398852
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2014-11-22T22:20:40
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Corrected header file documentation comment.
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557d43e6
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2014-10-13T10:46:27
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Minor cleanups
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24c86b55
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2014-09-11T19:24:42
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[X11] Reconcile logical keyboard state with physical state on FocusIn
since the window system doesn't do it for us like other platforms.
This prevents sticky keys and missed keys when going in and out
of focus, for example Alt would appear to stick if switching away
from an SDL app with Alt-Tab and had to be pressed again.
CR: Sam
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3dcb451f
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2014-04-09T21:29:19
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Added a README file regarding WinRT support
To note, this file is currently formatted with CRLF line endings, rather than
LF, to allow the file to be viewed with Notepad.
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58edac3e
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2014-02-02T00:53:27
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Fixed bug 2374 - Update copyright for 2014...
Is it that time already??
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f848adff
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2013-11-29T10:06:08
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Improve Android pause/resume behavior.
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7e1289af
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2013-11-24T23:56:17
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Make internal SDL sources include SDL_internal.h instead of SDL_config.h
The new header will include SDL_config.h, but allows for other global stuff.
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9095952a
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2013-11-20T12:51:18
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Clean up X11 OpenGL ES backend
If you really need to switch between OpenGL and GLES context types, just issue
a SDL_GL_UnloadLibrary manually.
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35915d4f
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2013-11-14T20:14:02
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Clean up the EGL related video backends (X11, Android, RPi)
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a2bd8970
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2013-10-18T01:36:41
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Don't supply duplicate X11 symbols inside SDL.
Fixes static linking when something else also uses X11.
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ace1e98a
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2013-08-29T15:02:32
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Fixes bug #2040, prepare SDL_GL_CONTEXT_EGL for deprecation on v2.1
SDL_GL_CONTEXT_EGL = 1 is now internally treated as profile_mask = SDL_GL_CONTEXT_PROFILE_ES
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0eeb76d8
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2013-08-19T16:29:46
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Fixes bug #2037, common EGL code for Android and X11
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dad42067
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2013-08-12T11:13:50
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Fixes #2022, do not resume on Android when surfaceChanged
If the app is in landscape mode and the user presses the power button, a pause
is followed immediately by a surfaceChanged event because the lock screen
is shown in portrait mode. This triggers a "false" resume.
So, we just pause and resume following the onWindowFocusChanged events.
Also, wait for SDL_APP_WILLENTERBACKGROUND and SDL_APP_DIDENTERBACKGROUND before
blocking the event pump.
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1ad936eb
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2013-08-11T19:56:43
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Fixed bug 2027 - Full-screen appears to be broken - hang in SDL_DestroyWindow()
Rainer Deyke
I'm running Linux Mint 15 with the Cinnamon window manager. SDL_DestroyWindow consistently locks up for me when the window if fullscreen.
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