[Chimera-users] Re: Chimera graphics card requirements

Hi Jim, I think Chimera will start without an OpenGL stencil buffer. But the outline highlighting of selected atoms/bonds/... will not work. Fill mode highlighting settable with Favorites/Preferences/General/ Selection highlight method will work. With a Quadro4 700 XGL on Linux you should definitely have a stencil buffer available. Below is the output of "glxinfo -t" on my Linux system with Quadro4 500 graphics. It shows half the visuals have 8 bit stencil buffer. It shows I am using the Nvidia 4191 driver OpenGL version string: 1.4.0 NVIDIA 41.91 Check the OpenGL version string on your machine to make sure you are using the Nvidia driver and not Mesa (software opengl). Tom $ glxinfo -t name of display: :0.0 display: :0 screen: 0 direct rendering: Yes server glx vendor string: NVIDIA Corporation server glx version string: 1.3 server glx extensions: GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer client glx vendor string: NVIDIA Corporation client glx version string: 1.3 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_SGIX_swap_group, GLX_SGIX_swap_barrier, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_NV_float_buffer GLX extensions: GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_ARB_get_proc_address OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: Quadro4 500 GoGL/AGP/SSE2 OpenGL version string: 1.4.0 NVIDIA 41.91 OpenGL extensions: GL_ARB_imaging, GL_ARB_multitexture, GL_ARB_point_parameters, GL_ARB_texture_compression, GL_ARB_texture_cube_map, GL_ARB_texture_env_add, GL_ARB_texture_env_combine, GL_ARB_texture_env_dot3, GL_ARB_texture_mirrored_repeat, GL_ARB_transpose_matrix, GL_ARB_vertex_program, GL_ARB_window_pos, GL_S3_s3tc, GL_EXT_abgr, GL_EXT_bgra, GL_EXT_blend_color, GL_EXT_blend_minmax, GL_EXT_blend_subtract, GL_EXT_clip_volume_hint, GL_EXT_compiled_vertex_array, GL_EXT_draw_range_elements, GL_EXT_fog_coord, GL_EXT_multi_draw_arrays, GL_EXT_packed_pixels, GL_EXT_paletted_texture, GL_EXT_point_parameters, GL_EXT_rescale_normal, GL_EXT_secondary_color, GL_EXT_separate_specular_color, GL_EXT_shared_texture_palette, GL_EXT_stencil_wrap, GL_EXT_texture_compression_s3tc, GL_EXT_texture_cube_map, GL_EXT_texture_edge_clamp, GL_EXT_texture_env_add, GL_EXT_texture_env_combine, GL_EXT_texture_env_dot3, GL_EXT_texture_filter_anisotropic, GL_EXT_texture_lod, GL_EXT_texture_lod_bias, GL_EXT_texture_object, GL_EXT_vertex_array, GL_IBM_texture_mirrored_repeat, GL_KTX_buffer_region, GL_NV_blend_square, GL_NV_fence, GL_NV_fog_distance, GL_NV_light_max_exponent, GL_NV_packed_depth_stencil, GL_NV_pixel_data_range, GL_NV_point_sprite, GL_NV_register_combiners, GL_NV_texgen_reflection, GL_NV_texture_env_combine4, GL_NV_texture_rectangle, GL_NV_vertex_array_range, GL_NV_vertex_array_range2, GL_NV_vertex_program, GL_NV_vertex_program1_1, GL_NVX_ycrcb, GL_SGIS_generate_mipmap, GL_SGIS_multitexture, GL_SGIS_texture_lod glu version: 1.3 glu extensions: GLU_EXT_nurbs_tessellator, GLU_EXT_object_space_tess Vis Vis Visual Trans buff lev render DB ste r g b a aux dep ste accum buffers MS MS ID Depth Type parent size el type reo sz sz sz sz buf th ncl r g b a num bufs ---------------------------------------------------------------------------------------------------- 0x21 24 TrueColor 0 32 0 rgba 1 0 8 8 8 0 0 24 8 16 16 16 16 0 0 0x22 24 DirectColor 0 32 0 rgba 1 0 8 8 8 0 0 24 8 16 16 16 16 0 0 0x23 24 TrueColor 0 32 0 rgba 1 0 8 8 8 8 0 24 8 16 16 16 16 0 0 0x24 24 TrueColor 0 32 0 rgba 0 0 8 8 8 0 0 24 8 16 16 16 16 0 0 0x25 24 TrueColor 0 32 0 rgba 0 0 8 8 8 8 0 24 8 16 16 16 16 0 0 0x26 24 TrueColor 0 32 0 rgba 1 0 8 8 8 0 0 0 0 16 16 16 16 0 0 0x27 24 TrueColor 0 32 0 rgba 1 0 8 8 8 8 0 0 0 16 16 16 16 0 0 0x28 24 TrueColor 0 32 0 rgba 0 0 8 8 8 0 0 0 0 16 16 16 16 0 0 0x29 24 TrueColor 0 32 0 rgba 0 0 8 8 8 8 0 0 0 16 16 16 16 0 0 0x2a 24 DirectColor 0 32 0 rgba 1 0 8 8 8 8 0 24 8 16 16 16 16 0 0 0x2b 24 DirectColor 0 32 0 rgba 0 0 8 8 8 0 0 24 8 16 16 16 16 0 0 0x2c 24 DirectColor 0 32 0 rgba 0 0 8 8 8 8 0 24 8 16 16 16 16 0 0 0x2d 24 DirectColor 0 32 0 rgba 1 0 8 8 8 0 0 0 0 16 16 16 16 0 0 0x2e 24 DirectColor 0 32 0 rgba 1 0 8 8 8 8 0 0 0 16 16 16 16 0 0 0x2f 24 DirectColor 0 32 0 rgba 0 0 8 8 8 0 0 0 0 16 16 16 16 0 0 0x30 24 DirectColor 0 32 0 rgba 0 0 8 8 8 8 0 0 0 16 16 16 16 0 0

From: Jim Procter Reply-To: procter@zbh.uni-hamburg.de Organization: Zentrum Bioinformatik Hamburg To: Thomas Goddard Subject: Chimera graphics card requirements Date: Tue, 10 Jun 2003 10:53:20 +0200

Hi. I'm sorry to bother you again - particularly with some trivial hardware question, but I've been wondering about the minimum specification of OpenGL graphics driver needed for Chimera.

We have Quadro4 700 XGL/AGP/SSE2 drivers for our linux-installations, on what I would expect to be fairly high-end PCs. There doesn't seem to be any way to force these drivers to generate a stencil buffer - is this what other people have found ?

Thanks. Jim