pygame初始化framebuffer或x服务器

我有一个类检查合适的帧缓冲区，它工作得很好。一对计算机（主要是嵌入式旧板）没有帧缓冲区，所以我删除了init(self): 函数并手动将其设置为在 X 下运行。两种方式都可以在各自的系统上运行，我只是厌倦了每次进行更改时都将其移植。

这是工作帧缓冲区代码：

    class wxdisplay :
        screen = None;

        def __init__(self):
            "Ininitializes a new pygame screen using the framebuffer"
            # Based on "Python GUI in Linux frame buffer"
            # http://www.karoltomala.com/blog/?p=679
            disp_no = os.getenv("DISPLAY")
            if disp_no:
                print "I'm running under X display = {0}".format(disp_no)

            # Check which frame buffer drivers are available
            # Start with fbcon since directfb hangs with composite output
            drivers = ['fbcon', 'directfb', 'svgalib']
            found = False
            for driver in drivers:
                # Make sure that SDL_VIDEODRIVER is set
                if not os.getenv('SDL_VIDEODRIVER'):
                    os.putenv('SDL_VIDEODRIVER', driver)
                try:
                    pygame.display.init()
                except pygame.error:
                    print 'Driver: {0} failed.'.format(driver)
                    continue
                found = True
                break

            if not found:
                raise Exception('No suitable video driver found!')

            size = (pygame.display.Info().current_w, pygame.display.Info().current_h)
            print "Framebuffer size: %d x %d" % (size[0], size[1])
            self.screen = pygame.display.set_mode(size, pygame.FULLSCREEN)class wxdisplay :

这是非帧缓冲版本：

    class wxdisplay :
        pygame.init()
        size = (1024, 768)
        screen = pygame.display.set_mode(size)
        print "Framebuffer size: %d x %d" % (size[0], size[1])

我想尝试初始化帧缓冲区，如果失败，请尝试在控制台上运行它。我尝试过或排除过的每件事都失败了......

    class wxdisplay :
        def __init__(self):
                    # Try to use framebuffer, and use the local X server if not there
                    try:
                            screen = None;
                            "Ininitializes a new pygame screen using the framebuffer"
                            # Based on "Python GUI in Linux frame buffer"
                            # http://www.karoltomala.com/blog/?p=679
                            disp_no = os.getenv("DISPLAY")
                            print("disp_no " +disp_no)
                            if disp_no:
                                    print "I'm running under X display = {0}".format(disp_no)

                            # Check which frame buffer drivers are available
                            # Start with fbcon since directfb hangs with composite output
                            drivers = ['fbcon', 'directfb', 'svgalib', 'xvfb', 'Xvfb']
                            found = False
                            for driver in drivers:
                                    # Make sure that SDL_VIDEODRIVER is set
                                    if not os.getenv('SDL_VIDEODRIVER'):
                                            os.putenv('SDL_VIDEODRIVER', driver)
                                    try:
                                            print("Driver: "+driver)
                                            pygame.display.init()
                                    except pygame.error:
                                            print 'Driver: {0} failed.'.format(driver)
                                            continue
                                    found = True
                                    print("break")
                                    break


                            if not found:
                                    raise Exception('No suitable video driver found!')

                            size = (pygame.display.Info().current_w, pygame.display.Info().current_h)
                            print "Framebuffer size: %d x %d" % (size[0], size[1])
                            self.screen = pygame.display.set_mode(size, pygame.FULLSCREEN)

                    except:
                            print('No suitable Framebuffer found!')
                            pygame.init()
                            size = (1024, 768)
                            print "X server size: %d x %d" % (size[0], size[1])
                            self.screen = pygame.display.set_mode(size)

失败并显示：

starting from __main__ call
disp_no localhost:11.0
I'm running under X display = localhost:11.0
Driver: fbcon
Driver: fbcon failed.
Driver: directfb
commandline read: python
commandline read: ./PiWxDisplay.py

~~~~~~~~~~~~~~~~~~~~~~~~~~| DirectFB 1.2.10 |~~~~~~~~~~~~~~~~~~~~~~~~~~
    (c) 2001-2008  The world wide DirectFB Open Source Community
    (c) 2000-2004  Convergence (integrated media) GmbH
  ----------------------------------------------------------------

(*) DirectFB/Core: Single Application Core. (2012-05-20 13:17)
(!) Direct/Util: opening '/dev/fb0' and '/dev/fb/0' failed
    --> No such file or directory
(!) DirectFB/FBDev: Error opening framebuffer device!
(!) DirectFB/FBDev: Use 'fbdev' option or set FRAMEBUFFER environment variable.
(!) DirectFB/Core: Could not initialize 'system_core' core!
    --> Initialization error!
Driver: directfb failed.
Driver: svgalib
Driver: svgalib failed..
No suitable Framebuffer found!
X server size: 1024 x 768
Traceback (most recent call last):
  File "./PiWxDisplay.py", line 366, in <module>
    wxdisplay().start_screen()
  File "./PiWxDisplay.py", line 66, in __init__
    self.screen = pygame.display.set_mode(size)
pygame.error: No available video device

我显然不完全理解如何正确初始化 pygame。我怎样才能得到它

1. 检查 FB 驱动程序
2. 如果 FB 驱动程序检测失败，请使用 X 服务器

回答晚了，但我希望我能早点尝试一下：

您可能需要成为 root 才能使用帧缓冲区驱动程序。

（这对我的情况有帮助：RaspberryPi 2 没有运行 X，但连接了屏幕。我现在可以通过 SSH 或直接在 RPi 上打开显示器）