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Color cursor transparency problem on Linux AMD |  |
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Turo Lamminen
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Color cursor transparency appears to be broken with AMD GPUs on Linux
(fglrx driver). There's a colored box around my cursor where there should be transparency. Currently there doesn't appear to be a test program for this. test_automation has some code but that doesn't allow you to actually see the results. Attached is a small program which allows you to switch cursors. If you find it useful feel free to add it to tests. Just clean it up and add error handling first 
This works on Windows, Mac and Linux with Nvidia GPUs (binary driver). Intel GPUs or free drivers not tested. Could someone with access to them do that? This looks like an AMD bug. Quick googling finds similar problem in Legend of Grimrock: http://www.grimrock.net/forum/viewtopic.php?f=12&t=4583 Does someone know who ported it and does it use SDL2? Can SDL do anything about this or is the only recourse for AMD to fix their driver? Present in both 2.0.3 and latest Hg. Also the wiki on SDL_CreateCursor is out of date. It doesn't mention SDL_CreateColorCursor and suggests drawing color cursors yourself. _______________________________________________ SDL mailing list http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org |
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mr_tawan
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It appears that SDL calls X11 function, either `X11_CreateXCursorCursor()` or `X11_CreatePixmapCursor()`. My guess is that it would be only AMD who can fix the problem.
BTW, if the cause is known, it would be possible to find a workaround. That's what being a support programmer teaches me :-). |
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Color cursor transparency problem on Linux AMD | |
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Elias Vanderstuyft
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The problem doesn't seem to exist with Intel graphics on Linux (Fedora 18 x86_64):
Using the i915 drm driver. $ glxinfo | grep OpenGL OpenGL vendor string: Intel Open Source Technology Center OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile OpenGL core profile version string: 3.1 (Core Profile) Mesa 9.2.0-devel OpenGL core profile shading language version string: 1.40 OpenGL core profile context flags: (none) OpenGL core profile extensions: OpenGL version string: 3.0 Mesa 9.2.0-devel OpenGL shading language version string: 1.30 OpenGL context flags: (none) OpenGL extensions: I rebuild this RPM-package of SDL2: http://download.fedoraproject.org/pub/fedora/linux/updates/19/SRPMS/SDL2-2.0.3-1.fc19.src.rpm $ sdl2-config --version 2.0.3 $ gcc -std=c99 -I/usr/include/SDL2 -lSDL2 -lm -lGL cursorTest.c -o cursorTest $ ./cursorTest I recorded running the cursorTest program with SimpleScreenRecorder in opengl mode, the resulting video is exactly the same as running cursorTest without recording. I attached the resulting video, for you guys to really verify the problem doesn't exist here. Cheers, Elias On Wed, Jun 18, 2014 at 1:07 PM, Turo Lamminen wrote:
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