Bug 9335 – egl fb config attributes support broken (doesnt follow egl spec at any rate).

Bug 9335 - (int-158815) egl fb config attributes support broken (doesnt follow egl spec at any rate).

(int-158815)
Summary:	egl fb config attributes support broken (doesnt follow egl spec at any rate).

Status:	NEW

Product:	Core
Component:	X Server
Version:	5.0/(3.2010.02-8)
Platform:	N900 Maemo

Importance:	Unspecified major with 1 vote (vote)
Target Milestone:	---
Assigned To:	unassigned
QA Contact:	x-server-bugs

URL:	http://www.rasterman.com/files/e17-n9...
Keywords:

Depends on:
Blocks:
	Show dependency tree

Reported:	2010-03-01 14:46 UTC by Carsten Haitzler
Modified:	2011-05-12 11:27 UTC (History)
CC List:	3 users (show)

See Also:

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Description Carsten Haitzler (reporter) 2010-03-01 14:46:40 UTC

SOFTWARE VERSION:
5.0/(3.2010.02-8)

EXACT STEPS LEADING TO PROBLEM:

use extra software indicated - run expedite -e gl or elementary_test with gl
engine enabled (see below for references to previous bug report).

eglCreateWindowSurface() fails with EGL_BAD_CONFIG if you use a config which
has:

   config_attrs[n++] = EGL_RED_SIZE;
   config_attrs[n++] = 1;
   config_attrs[n++] = EGL_GREEN_SIZE;
   config_attrs[n++] = 1;
   config_attrs[n++] = EGL_BLUE_SIZE;
   config_attrs[n++] = 1;

in it (chosen by eglChooseConfig() which chooses a config and doesnt fail). the
values (minimum bits) for r, g, b et.c can be 1, 8 - doesnt matter. it fails
the moment you have them.

EXPECTED OUTCOME:

eglCreateWindowSurface() should succeed as the config is valid for the given
display - you have red, green and blue components there of at least 1 bit... :)

ACTUAL OUTCOME:

call fails (error as above)

REPRODUCIBILITY:

always

EXTRA SOFTWARE INSTALLED:
http://www.rasterman.com/files/e17-n900-broken.tar.gz

special broken version for you. same installation/removal as
https://bugs.maemo.org/show_bug.cgi?id=9320

OTHER COMMENTS:

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.14)
Gecko/2009090216 Ubuntu/9.04 (jaunty) Firefox/3.0.14

Comment 1 Andre Klapper maemo.org

2010-03-01 15:25:32 UTC

Hi Carsten, thanks for reporting this!

Comment 2 Carsten Haitzler (reporter) 2010-03-01 16:00:35 UTC

cool! people looking at it - sorry for the other bug report:

https://bugs.maemo.org/show_bug.cgi?id=9320

it's a bit more of a monster - harder to have isolated to some simple calls to
fix, but needs fixing either way. u'll want to refer to it for info on
installing software and testing things.

Comment 3 Bartosz Taudul 2010-03-11 02:02:38 UTC

Confirming. My limited experimentation unrelated to this bug showed that
EGL_BUFFER_SIZE must be specified in a call to eglChooseConfig(), even if spec
states that "The smallest color buffer of at least the specified size is
preferred. The default value is 0.". If this is left at default, any color
buffer size should be acceptable.

Comment 4 Matti Lehtonen 2011-05-12 11:27:50 UTC

Confirm. eglCreateWindowSurface() fails with EGL_BAD_CONFIG.