DXTn/DXTC texture compression, aka GL_EXT_texture_compression_s3tc -> Fixed in SVN.

[Spencer Allain]

Since Virtual Box is passing the work to the real graphics driver (where the S3 patented algorithms implementations live), it seems that it could reveal that it has this capability and make it accessible when the underlying driver supports it.

This would increase the success likelihood of Direct3D 6.0+ mapped to OpenGL calls (because Direct3D 6.0 requires DXTX which is just a renamed form of S3TC) ​http://forums.virtualbox.org/viewtopic.php?f=7&t=19501 ​http://www.virtualbox.org/ticket/4495

There are also pure OpenGL applications that depend upon S3TC, such as Call of Duty and NASA World Wind: ​http://www.virtualbox.org/ticket/2801 ​http://worldwind.arc.nasa.gov/java/demos/

[Leonid Lobachev]

It's already supported (for host cards which support opengl 2.0).

[Spencer Allain]

Maybe that is true under some configurations (but that doesn't appear to be the case with my Windows Host and Linux Guest) As you can see in my Virtual Box log output, OpenGL version is 2.1.8494 (which is greater than 2.0) contains GL_EXT_texture_compression_s3tc, but a glxinfo shown further down has no such entry.

Virtual Box Log

00:00:01.633 OpenGL Info: Render SPU: GL_VENDOR: ATI Technologies Inc. 00:00:01.633 OpenGL Info: Render SPU: GL_RENDERER: ATI Radeon HD 2400 Pro 00:00:01.633 OpenGL Info: Render SPU: GL_VERSION: 2.1.8494 Release 00:00:01.633 OpenGL Info: Render SPU: GL_EXTENSIONS: GL_AMD_performance_monitor GL_ARB_color_buffer_float GL_ARB_depth_buffer_float GL_ARB_depth_texture GL_ARB_draw_buffers GL_ARB_draw_instanced GL_ARB_fragment_program GL_ARB_fragment_program_shadow GL_ARB_fragment_shader GL_ARB_framebuffer_object GL_ARB_framebuffer_sRGB GL_ARB_half_float_pixel GL_ARB_half_float_vertex GL_ARB_instanced_arrays GL_ARB_map_buffer_range GL_ARB_multisample GL_ARB_multitexture GL_ARB_occlusion_query GL_ARB_pixel_buffer_object GL_ARB_point_parameters GL_ARB_point_sprite GL_ARB_shader_objects GL_ARB_shader_texture_lod GL_ARB_shading_language_100 GL_ARB_shadow GL_ARB_shadow_ambient GL_ARB_texture_border_clamp GL_ARB_texture_compression GL_ARB_texture_compression_rgtc GL_ARB_texture_cube_map 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_mirrored_repeat GL_ARB_texture_non_power_of_two GL_ARB_texture_rectangle GL_ARB_texture_rg GL_ARB_transpose_matrix GL_ARB_vertex_array_object GL_ARB_vertex_buffer_object GL_ARB_vertex_program GL_ARB_vertex_shader GL_ARB_window_pos GL_ATI_draw_buffers GL_ATI_envmap_bumpmap GL_ATI_fragment_shader GL_ATI_meminfo GL_ATI_separate_stencil GL_ATI_texture_compression_3dc GL_ATI_texture_env_combine3 GL_ATI_texture_float 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_copy_texture GL_EXT_draw_buffers2 GL_EXT_draw_range_elements GL_EXT_fog_coord GL_EXT_framebuffer_blit GL_EXT_framebuffer_multisample GL_EXT_framebuffer_object GL_EXT_framebuffer_sRGB 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_point_parameters GL_EXT_rescale_normal GL_EXT_secondary_color GL_EXT_separate_specular_color GL_EXT_shadow_funcs GL_EXT_stencil_wrap GL_EXT_subtexture GL_EXT_texgen_reflection GL_EXT_texture3D GL_EXT_texture_array 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_add GL_EXT_texture_env_combine GL_EXT_texture_env_dot3 GL_EXT_texture_filter_anisotropic GL_EXT_texture_integer GL_EXT_texture_lod_bias GL_EXT_texture_mirror_clamp GL_EXT_texture_object GL_EXT_texture_rectangle GL_EXT_texture_sRGB GL_EXT_texture_shared_exponent GL_EXT_transform_feedback GL_EXT_vertex_array GL_KTX_buffer_region GL_NV_blend_square GL_NV_conditional_render GL_NV_copy_depth_to_color GL_NV_texgen_reflection GL_SGIS_generate_mipmap GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod GL_WIN_swap_hint WGL_EXT_swap_control

glxinfo from Guest OS

OpenGL vendor string: Humper OpenGL renderer string: Chromium OpenGL version string: 2.0 Chromium 1.9 OpenGL shading language version string: 1.20 OpenGL extensions:

GL_ARB_depth_texture, GL_ARB_fragment_program, GL_ARB_multisample, GL_ARB_multitexture, GL_ARB_occlusion_query, GL_ARB_point_parameters, GL_ARB_point_sprite, GL_ARB_shadow, GL_ARB_shadow_ambient, GL_ARB_texture_border_clamp, GL_ARB_texture_compression, GL_ARB_texture_cube_map, GL_ARB_texture_env_add, GL_ARB_texture_env_combine, GL_EXT_texture_env_combine, GL_ARB_texture_env_crossbar, GL_ARB_texture_env_dot3, GL_EXT_texture_env_dot3, GL_ARB_texture_mirrored_repeat, GL_ARB_texture_non_power_of_two, GL_ARB_transpose_matrix, GL_ARB_vertex_buffer_object, GL_ARB_vertex_program, GL_ARB_window_pos, GL_EXT_blend_color, GL_EXT_blend_minmax, GL_EXT_blend_func_separate, GL_EXT_blend_subtract, GL_EXT_texture_env_add, GL_EXT_fog_coord, GL_EXT_multi_draw_arrays, GL_EXT_secondary_color, GL_EXT_shadow_funcs, GL_EXT_stencil_wrap, GL_EXT_texture_cube_map, GL_EXT_texture_edge_clamp, GL_EXT_texture_filter_anisotropic, GL_EXT_texture_lod_bias, GL_EXT_texture_object, GL_EXT_texture3D, GL_NV_texgen_reflection, GL_EXT_texture_rectangle, GL_SGIS_generate_mipmap, GL_SGIS_texture_edge_clamp, GL_CR_state_parameter, GL_CR_cursor_position, GL_CR_bounding_box, GL_CR_print_string, GL_CR_tilesort_info, GL_CR_synchronization, GL_CR_head_spu_name, GL_CR_performance_info, GL_CR_window_size, GL_CR_tile_info, GL_CR_saveframe, GL_CR_readback_barrier_size, GL_CR_server_id_sharing, GL_CR_server_matrix, GL_ARB_shading_language_100, GL_ARB_shader_objects, GL_ARB_vertex_shader, GL_ARB_fragment_shader

[Leonid Lobachev]

I should've mention it's done in the SVN tree, not in 3.0.2. Pardon.

[Frank Mehnert]

Please upgrade to VBox 3.1.0, upgrade the guest additions to VBox 3.1.0 as well!