Examples runtime problem - OpenGL / GLX related

[smartmic]

I have a Debian Wheezy box and had already to change the linking lib to get compilation done. Compilation finishes without errors now, but I could not get the examples running, this is the error:

$ bin/overview
Error 65543: GLX: An OpenGL profile requested but GLX_ARB_create_context_profile is unavailable
Speicherzugriffsfehler

My LIBS variable in the Makefile was determined with pkg-config:

$ pkg-config --static --libs glfw3 gl glew glu
-L/usr/local/lib -lglfw3 -lrt -ldl -lXrandr -lXinerama -lXi -lXxf86vm -lXcursor -lXrender -lXfixes -lGLEW -lGLU -lGL -lm -lXext -lX11 -lpthread -lxcb -lXau -lXdmcp

I was wondering if the runtime is related to missing dependencies, but the mentioned profile is availble, see my output of glxinfo. What am I missing? Or is nouveau the culprit?

$ glxinfo
name of display: :0.0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.4
server glx extensions:
    GLX_ARB_multisample, GLX_EXT_import_context, GLX_EXT_texture_from_pixmap,
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer,
    GLX_OML_swap_method, GLX_SGI_swap_control, GLX_SGIS_multisample,
    GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group,
    GLX_INTEL_swap_event
client glx vendor string: Mesa Project and SGI
client glx version string: 1.4
client glx extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile,
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context,
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_EXT_framebuffer_sRGB,
    GLX_EXT_create_context_es2_profile, GLX_MESA_copy_sub_buffer,
    GLX_MESA_multithread_makecurrent, GLX_MESA_swap_control,
    GLX_OML_swap_method, GLX_OML_sync_control, GLX_SGI_make_current_read,
    GLX_SGI_swap_control, GLX_SGI_video_sync, GLX_SGIS_multisample,
    GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group,
    GLX_EXT_texture_from_pixmap, GLX_INTEL_swap_event
GLX version: 1.4
GLX extensions:
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context,
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer,
    GLX_MESA_multithread_makecurrent, GLX_MESA_swap_control,
    GLX_OML_swap_method, GLX_OML_sync_control, GLX_SGI_make_current_read,
    GLX_SGI_swap_control, GLX_SGI_video_sync, GLX_SGIS_multisample,
    GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group,
    GLX_EXT_texture_from_pixmap
OpenGL vendor string: nouveau
OpenGL renderer string: Gallium 0.4 on NVAC
OpenGL version string: 2.1 Mesa 8.0.5
OpenGL shading language version string: 1.20
OpenGL extensions:

[pendingchaos]

Updating to a newer version of Mesa might fix this problem. The overview example requires OpenGL 3.3 support. The output of glxinfo shows OpenGL 2.1 support.

[dumblob]

Seems to be similar to #89 - @smartmic take a look at the proposed solution outlined in #89 (comment) .

[vurtun]

Thanks for you issue. Quick question does any of the demos work or is nothing running at all? If none of the demos or examples run then like @dumblob there is the possibility that you don't have the correct OpenGL version. If it is really a version problem then I probably have to create a OpenGL demo version which runs on a lower version.

[smartmic]

Thanks for the answers. The only demo I could get run was x11/bin/zahnrad. For all of the examples the error remains also when following the proposed solution in #89. So I guess it is due to my older OpenGL version. Is there a simple trick to use nuklear with older OpenGL versions as well?

[vurtun]

I can spend some time tomorrow and see how far I get with an older version of OpenGL for glfw and sdl.

[andreygursky]

OpenGL 2.1 support

@smartmic:
you can start with the following patch:

diff --git a/example/overview.c b/example/overview.c
index 2b7126b..7a71ddb 100644
--- a/example/overview.c
+++ b/example/overview.c
@@ -1381,9 +1381,8 @@ int main(int argc, char *argv[])
         fprintf(stdout, "[GFLW] failed to init!\n");
         exit(1);
     }
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1);
 #ifdef __APPLE__
     glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
 #endif

[andreygursky]

And then probably continue with: #89 (comment)

[daumiller]

Here's another, working, starting point. https://gist.github.com/daumiller/9301246b24b3efe5b26006d88856747f

It needs cleaning up; but it does work.
(Things could be changed/re-arranged, and a lot of the state code was ripped out.)

[smartmic]

@andreygursky thanks, first step was successful, but I still could not get it run. The suggestion of #89 did not help, and I still get this error:

$ bin/overview
overview: overview.c:1193: void device_init(struct device *): Assertion `status == 1' failed.
Abgebrochen

How can I find out if my system / vintage graphics card fulfills all prerequisites?

[vurtun]

OK I finished a OpenGL 2 demo version for SDL and GLFW (389176e) which allows using this library for older device with older OpenGL versions.