4 台独立的笔记本电脑，均运行 Ubuntu 11.04。
一个有 ATI 卡，运行 GLX 1.4、OpenGl 3.3、GLSL 3.3，按预期运行。
GLX信息:
name of display: :0.0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: ATI
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_OML_swap_method,
GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGIS_multisample,
GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group
client glx vendor string: ATI
client glx version string: 1.4
GLX version: 1.4
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI Mobility Radeon HD 3400 Series
OpenGL version string: 3.3.10665 Compatibility Profile Context
OpenGL shading language version string: 3.30
一个带有 Nvidia 卡，运行 GLX 1.4、OpenGL 3.3、GLSL 3.3，没有显示着色器的效果。
GLX信息:
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: Quadro NVS 140M/PCI/SSE2
OpenGL version string: 3.3.0 NVIDIA 280.13
OpenGL shading language version string: 3.30 NVIDIA via Cg compiler
另一台带有 Nvidia 卡的笔记本电脑运行 GLX 1.4、OpenGL 4.1、GLSL 4.1 运行正常，但是有一台相同的笔记本电脑显示与上述笔记本电脑相同的症状，但没有任何影响。
GLXINFO:工作
name of display: :0.0
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: NVS 4200M/PCI/SSE2
OpenGL version string: 4.1.0 NVIDIA 270.41.06
OpenGL shading language version string: 4.10 NVIDIA via Cg compiler
OpenGL extensions:
GL_ARB_blend_func_extended, GL_ARB_color_buffer_float,
GL_ARB_compatibility, 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_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_bit_encoding, GL_ARB_shader_objects,
GL_ARB_shader_precision, GL_ARB_shader_subroutine,
GL_ARB_shading_language_100, GL_ARB_shading_language_include,
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_swizzle, GL_ARB_timer_query, GL_ARB_transform_feedback2,
GL_ARB_transform_feedback3, 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_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_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_pixel_data_range,
GL_NV_point_sprite, GL_NV_primitive_restart, GL_NV_register_combiners,
GL_NV_register_combiners2, 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
GLXINFO:不工作
name of display: :0.0
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: NVS 4200M/PCI/SSE2
OpenGL version string: 4.1.0 NVIDIA 270.41.06
OpenGL shading language version string: 4.10 NVIDIA via Cg compiler
OpenGL extensions:
GL_ARB_blend_func_extended, GL_ARB_color_buffer_float,
GL_ARB_compatibility, 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_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_bit_encoding, GL_ARB_shader_objects,
GL_ARB_shader_precision, GL_ARB_shader_subroutine,
GL_ARB_shading_language_100, GL_ARB_shading_language_include,
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_swizzle, GL_ARB_timer_query, GL_ARB_transform_feedback2,
GL_ARB_transform_feedback3, 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_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_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_pixel_data_range,
GL_NV_point_sprite, GL_NV_primitive_restart, GL_NV_register_combiners,
GL_NV_register_combiners2, 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
简而言之，我想要做的是拍摄图像，找到足够蓝的部分以将其视为海洋，并使这些像素变亮，因为海洋太暗了。我使用的包(NASA WorldWind)是用 JAVA 编写的，使用 JOGL，所以我使用 JOGL 来使用自定义片段和顶点着色器来创建此效果。
发生了几件奇怪的事情，我相信这可能是导致缺少阴影的迹象。
首先，如果片段着色器无故更改为仅将所有像素着色为红色，则工作机器将显示红色球体。不工作的机器，红球闪一划，然后 map 恢复原图(可以看到整个地球，海洋是黑暗的)。
其次，如果对java包进行了更改，使得渲染循环不调用glUseProgram(0)，工作的机器渲染奇怪，但仍然关闭，而没有工作的机器将有一个半透明的球体那就是我在着色器中设置 GL_fragcolor 的任何颜色。由于它忽略了丢弃的像素并以这种颜色对它们进行着色，因此这变得更加奇怪。
第三，我从打开 jogl 调试得到的大部分调试信息都是垃圾，但在 ATI 机器上我可以看到它经常检索二次方纹理，而在 nvidia 机器上则不会如果没有相同的对，二次幂纹理会在运行开始时出现一两次。
着色器从 JOGL 代码接收一个统一的 sampler2D，并使用它创建一个 texture2D，通过它检索像素的颜色。
片段着色器
uniform sampler2D tile_image;
uniform float brightness;
const vec3 coef = vec3(0.2125, 0.7154, 0.0721);
uniform float saturation;
uniform vec4 hueToAdjust;
vec4 shadeTile(vec4 tile_val);
//Fragment shader. Colors every coordinate that is mostly blue to a lighter blue.
void main (void)
{
if (gl_TexCoord[0].s < 0 || gl_TexCoord[0].s > 1) discard;
if (gl_TexCoord[0].t < 0 || gl_TexCoord[0].t > 1) discard;
vec4 tile_val = texture2D(tile_image, gl_TexCoord[0].st);
//this if statement catches the majority of the ocean areas
if(tile_val.b >= (tile_val.g+tile_val.r))
{
tile_val = shadeTile(tile_val);
}
gl_FragColor = vec4 (tile_val.rgba);
}
vec4 shadeTile(vec4 tile_val)
{
//saturation
vec4 intensity = vec4(dot(tile_val.rgb,coef));
tile_val = mix(intensity, tile_val, saturation);
//contrast
tile_val = brightness * (1.0 - saturation) + tile_val;
//hue adjust
tile_val.rgba *= hueToAdjust;
//brightness
tile_val.rgba *= brightness;
return tile_val;
}
顶点着色器:
void main(void)
{
gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
gl_TexCoord[1] = gl_TextureMatrix[0] * gl_MultiTexCoord1;
gl_Position = ftransform();
}
渲染循环:
Public void render(DrawContext dc)
{
if (d_doRender)
{
GL gl = dc.getGL();
if (d_glsl != null && d_glsl.isShaderSupported())
{
d_glsl.useShaders();
d_glsl.startShader();
gl.glUniform1i(d_glsl.getUniformLocation("tile_image"), 0);
gl.glUniform1f(d_glsl.getUniformLocation("saturation"),
d_saturation);
gl.glUniform4f(d_glsl.getUniformLocation("hueToAdjust"),
d_hueToAdjust[0], d_hueToAdjust[1],
d_hueToAdjust[2], d_hueToAdjust[3]);
gl.glUniform1f(d_glsl.getUniformLocation("brightness"),
d_brightness);
}
super.render(dc);
if (d_glsl != null && d_glsl.isShaderSupported())
{
d_glsl.endShader();
}
}
}
还值得注意的是，程序和着色器信息日志没有提供有关不工作的机器的信息，而在 ATI 机器上，他们说着色器已成功编译以在该硬件上运行。
最佳答案
一些 GLSL 实现允许编写没有小数部分的 float ，如下所示:
if (gl_TexCoord[0].s < 0 || gl_TexCoord[0].s > 1) discard;
if (gl_TexCoord[0].t < 0 || gl_TexCoord[0].t > 1) discard;
但是，用小数部分编写 float 可以使您的着色器更便携且更符合规范。用作:
if (gl_TexCoord[0].s < 0.0 || gl_TexCoord[0].s > 1.0) discard;
if (gl_TexCoord[0].t < 0.0 || gl_TexCoord[0].t > 1.0) discard;
关于java - OpenGL ATI 与 NVIDIA GLSL 问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/9980448/