Eu consegui instalar um Debian 7.3 como convidado na VM do Virtualbox 4.3.6 com adições de convidados e não consigo fazer o trabalho webGL.
Embora eu consiga ver o openGL funcionando (tentei com glxinfoe glxgearsna linha de comando), não consigo fazer o webGL funcionar no Firefox / Chrome / Iceweasel (não tentei outros navegadores). Para verificar se o webgl está ok, estou acostumado a navegar em http://get.webgl.org/ ; algumas notas indicando o ponto em que cheguei:
- configurando webgl.force-enabled para true na
about:configpágina do firefox (e mais tarde para true); - verifiquei se o processo de instalação das adições de convidados funcionou bem (eu tive que instalar o módulo de cabeçalhos do kernel correto);
- aceleração 3D ativada para essa VM;
- na máquina host (Ubuntu 12.04), o webGL funciona bem.
Então, neste ponto: é possível fazer o webGL funcionar em um sistema operacional convidado debian (ou geralmente em um sistema operacional convidado, porque talvez isso não seja suportado)? Eu acho que quanto mais simples a solução, menos personalizada ela é e menos sujeita a erros estranhos.
A seguir, alguns links nos quais eu cheguei:
- https://groups.google.com/forum/#!topic/webgl-dev-list/VBmcmEMXAL0 ;
- http://web.archiveorange.com/archive/v/uC2UCk1UQ9htmqyPXtt0 .
Atualização 1
Tentei também com o Ubuntu 13.10 convidado, mesmo resultado.
Atualização 2
Resultado de glxinfo:
name of display: :0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: Chromium
server glx version string: 1.3 Chromium
server glx extensions:
GLX_ARB_multisample, GLX_EXT_texture_from_pixmap, GLX_SGIX_fbconfig,
GLX_ARB_get_proc_address
client glx vendor string: Chromium
client glx version string: 1.3 Chromium
client glx extensions:
GLX_ARB_multisample, GLX_EXT_texture_from_pixmap, GLX_SGIX_fbconfig,
GLX_ARB_get_proc_address
GLX version: 1.3
GLX extensions:
GLX_ARB_multisample, GLX_EXT_texture_from_pixmap, GLX_SGIX_fbconfig,
GLX_ARB_get_proc_address
OpenGL vendor string: Humper
OpenGL renderer string: Chromium
OpenGL version string: 2.1 Chromium 1.9
OpenGL shading language version string: 1.20
OpenGL extensions:
GL_EXT_draw_range_elements, GL_EXT_framebuffer_object,
GL_EXT_compiled_vertex_array, 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_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_IBM_texture_mirrored_repeat, GL_ARB_texture_non_power_of_two,
GL_ARB_transpose_matrix, GL_ARB_vertex_buffer_object,
GL_ARB_pixel_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_IBM_rasterpos_clip,
GL_NV_texgen_reflection, GL_NV_texture_rectangle,
GL_EXT_texture_rectangle, GL_ARB_texture_rectangle, GL_NV_vertex_program,
GL_NV_vertex_program1_1, GL_SGIS_generate_mipmap,
GL_SGIS_texture_border_clamp, GL_SGIS_texture_edge_clamp,
GL_ARB_shading_language_100, GL_ARB_shader_objects, GL_ARB_vertex_shader,
GL_ARB_fragment_shader, GL_EXT_texture_sRGB, GL_EXT_framebuffer_blit,
GL_EXT_blend_equation_separate, GL_EXT_stencil_two_side,
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_EXT_stencil_two_side
96 GLX Visuals
visual x bf lv rg d st colorbuffer sr ax dp st accumbuffer ms cav
id dep cl sp sz l ci b ro r g b a F gb bf th cl r g b a ns b eat
----------------------------------------------------------------------------
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96 GLXFBConfigs:
visual x bf lv rg d st colorbuffer sr ax dp st accumbuffer ms cav
id dep cl sp sz l ci b ro r g b a F gb bf th cl r g b a ns b eat
----------------------------------------------------------------------------
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Respostas:
Embora eu não tenha a configuração exata que você está usando, pude executar o WebGL no firefox com o host executando o Fedora 21, virtualbox versão 4.3.32 e o Fedora 22 como convidado. Eu também tentei o Centos 7 como convidado, com sucesso. Portanto, é possível executar o WebGL em um convidado usando o VirtualBox. Eu também tentei o Fedora 20 como convidado com sucesso. Você pode visitar o site www.doesmybrowsersupportwebgl.com e ver o que ele diz.
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