X-Server receives glGetString(GL_EXTENSIONS) request and it replies with: "GL_ARB_fragment_shader GL_ARB_vertex_shader GL_ARB_shader_objects". Client process is started with LIBGL_ALWAYS_INDIRECT=1 but it doesn't receive extensions sent by X-Server, instead it gets "GL_ARB_transpose_matrix GL_EXT_draw_range_elements GL_EXT_multi_draw_arrays GL_SUN_multi_draw_arrays". Extra hints: - Other extensions (like: GL_ARB_occlusion_query) are correctly delivered from server to client. - Without LIBGL_ALWAYS_INDIRECT, mesa reports it is capable of GLSL extensions. Does it mean libGL's GLX encoder is missing something?
Extensions need to have GLX protocol supported on the client and on the server. For some extensions this just means they need to be added to the known_gl_extensions in src/glx/glxextensions.c in Mesa. However, all of the GLSL related extensions need protocol implemented (e.g., glShaderSource). It's mostly just a lot of typing and testing. Patches welcome.
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