=====
Notes
=====

First on win32, if you are using msvc, you should check the glibconfig.h file:
About line 130, you should have:

#else /* _MSC_VER */
/* varargs macros available since msvc8 (vs2005) */
#  if _MSC_VER >= 1400
#    define G_HAVE_ISO_VARARGS 1
#    define __func__ __FUNCTION__
#   endif
#endif /* not _MSC_VER */


====================
OpenGL context infos
====================

#gst-launch-0.10 --gst-debug=gldisplay:N pipeline
#N=1: errors
#N=2: errors warnings
#N=3: errors warnings infos
#N=4: errors warnings infos
#N=5: errors warnings infos logs

gst-launch-0.10 --gst-debug=gldisplay:3 videotestsrc ! glimagesink


=======
Shaders
=======

win32:
set GST_GL_SHADER_DEBUG=1 (or something else because setting it to 0 is NOT like to not setting it at all)
gst-launch-0.10 videotestsrc ! glimagesink
when you are done, just type "set GST_GL_SHADER_DEBUG=" to unset it.

unix:
(Probably bash-specific, check your shell docs to know how to do it)

export GST_GL_SHADER_DEBUG=1
gst-launch-0.10 videotestsrc ! glimagesink
when you are done, just type "export -n GST_GL_SHADER_DEBUG" to unset it.

or just prepend your app with GST_GL_SHADER_DEBUG=1 (no need to unset):
GST_GL_SHADER_DEBUG=1 gst-launch-0.10 videotestsrc ! glimagesink
Note: the "1" value is completely arbitrary, what matters here is whether the
environment variable is set or not.


===========
gl elements
===========

gst-launch-0.10 --gst-debug=gleffects:3 videotestsrc ! glupload ! gleffects effect=8 ! glimagesink
gst-launch-0.10 --gst-debug=gleffects:3,gldisplay:3 videotestsrc ! glupload ! gleffects effect=8 ! glimagesink
GST_DEBUG=gl*:5 gst-launch-0.10 videotestsrc ! glupload ! glimagesink

Look at "Running GStreamer Application" section in the GStreamer Core
Reference Manual if you want more details about GStreamer debugging.


========
Remarks:
========

If you are not already mind irreversible, or if you are still looking for a dev environment
then you should try CodeBlocks which is available on both linux and windows, or vs8(9) on windows.
Indeed, nowadays ponctual debug traces, like printf and others (I mean not definitive traces like GST_DEBUG),
are forbidden. They have been replaced by break points which are useable only through a good IDE.