c - 未找到 glXCreateContextAttribsARB(在 OpenGL 4.2 驱动程序、GLX 1.4 上)

Question

奇怪的是，尽管我有 GLX 1.4，但我的存储库中似乎没有 glXCreateContextAttribsARB。

请问有什么合理的解释吗？这不可能是一个普遍的问题。

glxinfo

name of display: :0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: NVIDIA Corporation
server glx version string: 1.4
server glx extensions:
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig, 
    GLX_SGIX_pbuffer, GLX_SGI_video_sync, GLX_SGI_swap_control, 
    GLX_EXT_swap_control, GLX_EXT_texture_from_pixmap, GLX_ARB_create_context, 
    GLX_ARB_create_context_profile, GLX_EXT_create_context_es2_profile, 
    GLX_ARB_create_context_robustness, GLX_ARB_multisample, 
    GLX_NV_float_buffer, GLX_ARB_fbconfig_float, GLX_EXT_framebuffer_sRGB
client glx vendor string: NVIDIA Corporation
client glx version string: 1.4
client glx extensions:
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_visual_info, 
    GLX_EXT_visual_rating, GLX_EXT_import_context, GLX_SGI_video_sync, 
    GLX_NV_swap_group, GLX_NV_video_out, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, 
    GLX_SGI_swap_control, GLX_EXT_swap_control, GLX_ARB_create_context, 
    GLX_ARB_create_context_profile, GLX_NV_float_buffer, 
    GLX_ARB_fbconfig_float, GLX_EXT_fbconfig_packed_float, 
    GLX_EXT_texture_from_pixmap, GLX_EXT_framebuffer_sRGB, 
    GLX_NV_present_video, GLX_NV_copy_image, GLX_NV_multisample_coverage, 
    GLX_NV_video_capture, GLX_EXT_create_context_es2_profile, 
    GLX_ARB_create_context_robustness
GLX version: 1.4
GLX extensions:
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig, 
    GLX_SGIX_pbuffer, GLX_SGI_video_sync, GLX_SGI_swap_control, 
    GLX_EXT_swap_control, GLX_EXT_texture_from_pixmap, GLX_ARB_create_context, 
    GLX_ARB_create_context_profile, GLX_EXT_create_context_es2_profile, 
    GLX_ARB_create_context_robustness, GLX_ARB_multisample, 
    GLX_NV_float_buffer, GLX_ARB_fbconfig_float, GLX_EXT_framebuffer_sRGB, 
    GLX_ARB_get_proc_address
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce GTX 550 Ti/PCI/SSE2
OpenGL version string: 4.2.0 NVIDIA 290.10
OpenGL shading language version string: 4.20 NVIDIA via Cg compiler
OpenGL extensions:
    GL_ARB_base_instance, GL_ARB_blend_func_extended, 
    GL_ARB_color_buffer_float, GL_ARB_compatibility, 
    GL_ARB_compressed_texture_pixel_storage, GL_ARB_conservative_depth, 
    GL_ARB_copy_buffer, GL_ARB_depth_buffer_float, GL_ARB_depth_clamp, 
    GL_ARB_depth_texture, GL_ARB_draw_buffers, GL_ARB_draw_buffers_blend, 
    GL_ARB_draw_indirect, GL_ARB_draw_elements_base_vertex, 
    GL_ARB_draw_instanced, GL_ARB_ES2_compatibility, 
    GL_ARB_explicit_attrib_location, GL_ARB_fragment_coord_conventions, 
    GL_ARB_fragment_program, GL_ARB_fragment_program_shadow, 
    GL_ARB_fragment_shader, GL_ARB_framebuffer_object, 
    GL_ARB_framebuffer_sRGB, GL_ARB_geometry_shader4, 
    GL_ARB_get_program_binary, GL_ARB_gpu_shader5, GL_ARB_gpu_shader_fp64, 
    GL_ARB_half_float_pixel, GL_ARB_half_float_vertex, GL_ARB_imaging, 
    GL_ARB_instanced_arrays, GL_ARB_internalformat_query, 
    GL_ARB_map_buffer_alignment, GL_ARB_map_buffer_range, GL_ARB_multisample, 
    GL_ARB_multitexture, GL_ARB_occlusion_query, GL_ARB_occlusion_query2, 
    GL_ARB_pixel_buffer_object, GL_ARB_point_parameters, GL_ARB_point_sprite, 
    GL_ARB_provoking_vertex, GL_ARB_robustness, GL_ARB_sample_shading, 
    GL_ARB_sampler_objects, GL_ARB_seamless_cube_map, 
    GL_ARB_separate_shader_objects, GL_ARB_shader_atomic_counters, 
    GL_ARB_shader_bit_encoding, GL_ARB_shader_image_load_store, 
    GL_ARB_shader_objects, GL_ARB_shader_precision, GL_ARB_shader_subroutine, 
    GL_ARB_shading_language_100, GL_ARB_shading_language_420pack, 
    GL_ARB_shading_language_include, GL_ARB_shading_language_packing, 
    GL_ARB_shadow, GL_ARB_sync, GL_ARB_tessellation_shader, 
    GL_ARB_texture_border_clamp, GL_ARB_texture_buffer_object, 
    GL_ARB_texture_buffer_object_rgb32, GL_ARB_texture_compression, 
    GL_ARB_texture_compression_bptc, GL_ARB_texture_compression_rgtc, 
    GL_ARB_texture_cube_map, GL_ARB_texture_cube_map_array, 
    GL_ARB_texture_env_add, GL_ARB_texture_env_combine, 
    GL_ARB_texture_env_crossbar, GL_ARB_texture_env_dot3, 
    GL_ARB_texture_float, GL_ARB_texture_gather, 
    GL_ARB_texture_mirrored_repeat, GL_ARB_texture_multisample, 
    GL_ARB_texture_non_power_of_two, GL_ARB_texture_query_lod, 
    GL_ARB_texture_rectangle, GL_ARB_texture_rg, GL_ARB_texture_rgb10_a2ui, 
    GL_ARB_texture_storage, GL_ARB_texture_swizzle, GL_ARB_timer_query, 
    GL_ARB_transform_feedback2, GL_ARB_transform_feedback3, 
    GL_ARB_transform_feedback_instanced, GL_ARB_transpose_matrix, 
    GL_ARB_uniform_buffer_object, GL_ARB_vertex_array_bgra, 
    GL_ARB_vertex_array_object, GL_ARB_vertex_attrib_64bit, 
    GL_ARB_vertex_buffer_object, GL_ARB_vertex_program, GL_ARB_vertex_shader, 
    GL_ARB_vertex_type_2_10_10_10_rev, GL_ARB_viewport_array, 
    GL_ARB_window_pos, GL_ATI_draw_buffers, GL_ATI_texture_float, 
    GL_ATI_texture_mirror_once, GL_S3_s3tc, GL_EXT_texture_env_add, 
    GL_EXT_abgr, GL_EXT_bgra, GL_EXT_bindable_uniform, GL_EXT_blend_color, 
    GL_EXT_blend_equation_separate, GL_EXT_blend_func_separate, 
    GL_EXT_blend_minmax, GL_EXT_blend_subtract, GL_EXT_compiled_vertex_array, 
    GL_EXT_Cg_shader, GL_EXT_depth_bounds_test, GL_EXT_direct_state_access, 
    GL_EXT_draw_buffers2, GL_EXT_draw_instanced, GL_EXT_draw_range_elements, 
    GL_EXT_fog_coord, GL_EXT_framebuffer_blit, GL_EXT_framebuffer_multisample, 
    GL_EXTX_framebuffer_mixed_formats, GL_EXT_framebuffer_object, 
    GL_EXT_framebuffer_sRGB, GL_EXT_geometry_shader4, 
    GL_EXT_gpu_program_parameters, GL_EXT_gpu_shader4, 
    GL_EXT_multi_draw_arrays, GL_EXT_packed_depth_stencil, 
    GL_EXT_packed_float, GL_EXT_packed_pixels, GL_EXT_pixel_buffer_object, 
    GL_EXT_point_parameters, GL_EXT_provoking_vertex, GL_EXT_rescale_normal, 
    GL_EXT_secondary_color, GL_EXT_separate_shader_objects, 
    GL_EXT_separate_specular_color, GL_EXT_shader_image_load_store, 
    GL_EXT_shadow_funcs, GL_EXT_stencil_two_side, GL_EXT_stencil_wrap, 
    GL_EXT_texture3D, GL_EXT_texture_array, GL_EXT_texture_buffer_object, 
    GL_EXT_texture_compression_dxt1, GL_EXT_texture_compression_latc, 
    GL_EXT_texture_compression_rgtc, GL_EXT_texture_compression_s3tc, 
    GL_EXT_texture_cube_map, GL_EXT_texture_edge_clamp, 
    GL_EXT_texture_env_combine, GL_EXT_texture_env_dot3, 
    GL_EXT_texture_filter_anisotropic, GL_EXT_texture_format_BGRA8888, 
    GL_EXT_texture_integer, GL_EXT_texture_lod, GL_EXT_texture_lod_bias, 
    GL_EXT_texture_mirror_clamp, GL_EXT_texture_object, 
    GL_EXT_texture_shared_exponent, GL_EXT_texture_sRGB, 
    GL_EXT_texture_sRGB_decode, GL_EXT_texture_storage, 
    GL_EXT_texture_swizzle, GL_EXT_texture_type_2_10_10_10_REV, 
    GL_EXT_timer_query, GL_EXT_transform_feedback2, GL_EXT_vertex_array, 
    GL_EXT_vertex_array_bgra, GL_EXT_vertex_attrib_64bit, 
    GL_EXT_x11_sync_object, GL_EXT_import_sync_object, GL_IBM_rasterpos_clip, 
    GL_IBM_texture_mirrored_repeat, GL_KTX_buffer_region, GL_NV_alpha_test, 
    GL_NV_blend_minmax, GL_NV_blend_square, GL_NV_complex_primitives, 
    GL_NV_conditional_render, GL_NV_copy_depth_to_color, GL_NV_copy_image, 
    GL_NV_depth_buffer_float, GL_NV_depth_clamp, GL_NV_explicit_multisample, 
    GL_NV_fbo_color_attachments, GL_NV_fence, GL_NV_float_buffer, 
    GL_NV_fog_distance, GL_NV_fragdepth, GL_NV_fragment_program, 
    GL_NV_fragment_program_option, GL_NV_fragment_program2, 
    GL_NV_framebuffer_multisample_coverage, GL_NV_geometry_shader4, 
    GL_NV_gpu_program4, GL_NV_gpu_program4_1, GL_NV_gpu_program5, 
    GL_NV_gpu_program_fp64, GL_NV_gpu_shader5, GL_NV_half_float, 
    GL_NV_light_max_exponent, GL_NV_multisample_coverage, 
    GL_NV_multisample_filter_hint, GL_NV_occlusion_query, 
    GL_NV_packed_depth_stencil, GL_NV_parameter_buffer_object, 
    GL_NV_parameter_buffer_object2, GL_NV_path_rendering, 
    GL_NV_pixel_data_range, GL_NV_point_sprite, GL_NV_primitive_restart, 
    GL_NV_register_combiners, GL_NV_register_combiners2, 
    GL_NV_shader_atomic_counters, GL_NV_shader_buffer_load, 
    GL_NV_texgen_reflection, GL_NV_texture_barrier, 
    GL_NV_texture_compression_vtc, GL_NV_texture_env_combine4, 
    GL_NV_texture_expand_normal, GL_NV_texture_lod_clamp, 
    GL_NV_texture_multisample, GL_NV_texture_rectangle, GL_NV_texture_shader, 
    GL_NV_texture_shader2, GL_NV_texture_shader3, GL_NV_transform_feedback, 
    GL_NV_transform_feedback2, GL_NV_vdpau_interop, GL_NV_vertex_array_range, 
    GL_NV_vertex_array_range2, GL_NV_vertex_attrib_integer_64bit, 
    GL_NV_vertex_buffer_unified_memory, GL_NV_vertex_program, 
    GL_NV_vertex_program1_1, GL_NV_vertex_program2, 
    GL_NV_vertex_program2_option, GL_NV_vertex_program3, 
    GL_NVX_conditional_render, GL_NVX_gpu_memory_info, GL_OES_depth24, 
    GL_OES_depth32, GL_OES_depth_texture, GL_OES_element_index_uint, 
    GL_OES_fbo_render_mipmap, GL_OES_get_program_binary, GL_OES_mapbuffer, 
    GL_OES_packed_depth_stencil, GL_OES_rgb8_rgba8, 
    GL_OES_standard_derivatives, GL_OES_texture_3D, GL_OES_texture_float, 
    GL_OES_texture_float_linear, GL_OES_texture_half_float, 
    GL_OES_texture_half_float_linear, GL_OES_texture_npot, 
    GL_OES_vertex_array_object, GL_OES_vertex_half_float, 
    GL_SGIS_generate_mipmap, GL_SGIS_texture_lod, GL_SGIX_depth_texture, 
    GL_SGIX_shadow, GL_SUN_slice_accum

显然支持缓冲区绑定(bind)、ARB 和所有其他好东西，但为什么不支持 glXCreateContextAttribsARB？

更奇怪的是，我做的是 glXCreateContextAttribsARBPRoc，我很想知道它是否可以作为替代方案？

这个编译，例如:

`glXCreateContextAttribsARBProc glxccarb = 0;`

Answer 1

当您说“没有”时，我假设您的意思是“如果我尝试直接调用此名称的函数，我的应用将不会链接”。

这在某种程度上是设计使然。直接从 libGL 导出的函数列表没有增长。如果是这样，链接到一个(仅由一个导出的函数)新 libGL 的应用程序甚至无法针对旧的 libGL 启动。这很糟糕。

glXCreateContextAttribsARB 与所有其他扩展函数一样，应该使用 glXGetProcAddressARB 进行查找。更好的是，使用 GLEW所以您不必再担心这种程度的细节。