在Xfvb中渲染WebGL

Question

我想使用Xvfb无头测试WebGL代码.有谁知道怎么做？

我有2台机器 - 都运行Ubuntu.一个使用NVidia卡,另一个使用ATI:

NVidia机器:

ipmi:~ $>xvfb-run glxinfo
name of display: :455
display: :455  screen: 0
direct rendering: No (If you want to find out why, try setting LIBGL_DEBUG=verbose)
server glx vendor string: SGI
server glx version string: 1.4
server glx extensions:
    GLX_ARB_multisample, GLX_EXT_visual_info, GLX_EXT_visual_rating, 
    GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_OML_swap_method, 
    GLX_SGI_make_current_read, GLX_SGIS_multisample, GLX_SGIX_fbconfig, 
    GLX_SGIX_pbuffer, GLX_MESA_copy_sub_buffer, GLX_INTEL_swap_event
client glx vendor string: NVIDIA Corporation
client glx version string: 1.4
...

ipmi:~ $>xvfb-run glxgears
3725 frames in 5.0 seconds = 741.884 FPS
3840 frames in 5.0 seconds = 767.310 FPS
4080 frames in 5.0 seconds = 814.811 FPS
4120 frames in 5.0 seconds = 821.859 FPS

ATI机器:

shaka:~ $>xvfb-run glxinfo
name of display: :99
display: :99  screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.4
server glx extensions:
    GLX_ARB_multisample, GLX_EXT_visual_info, GLX_EXT_visual_rating, 
    GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_OML_swap_method, 
    GLX_SGI_make_current_read, GLX_SGIS_multisample, GLX_SGIX_fbconfig, 
    GLX_SGIX_pbuffer, GLX_MESA_copy_sub_buffer, GLX_INTEL_swap_event
client glx vendor string: Mesa Project and SGI
client glx version string: 1.4

shaka:~ $>xvfb-run glxgears
4326 frames in 5.0 seconds = 865.095 FPS
4343 frames in 5.0 seconds = 868.540 FPS

即使shaka支持使用Mesa进行直接渲染,我也无法获得WebGL上下文.

谢谢!

Answer 1

对于现代 X11，您最好忽略Xvfb并使用dummy显示驱动程序。有关使用它的信息，请参阅http://www.x.org/wiki/XorgTesting上的“附加说明” （您可能会xorg.conf在必要Device部分中指定自定义）。 http://www.karlrunge.com/x11vnc/Xdummy是使用虚拟驱动程序的另一种方法。