buffer.py 文件源码

def __init__(self, drm, format_, width, height):
        super(DrmDumbBuffer, self).__init__(drm, format_, width, height)

        arg = DrmModeCreateDumbC()
        arg.bpp = self.format.cpp[0] * 8;
        arg.width = self.width;
        arg.height = self.height;

        fcntl.ioctl(self._drm.fd, DRM_IOCTL_MODE_CREATE_DUMB, arg)

        #self.handle = arg.handle
        self.id = int(arg.handle)
        self.len = int(arg.size)
        self.pitch = int(arg.pitch)
        self._arg = arg

        self.handles[0] = self.id
        self.pitches[0] = self.pitch
        self.offsets[0] = 0

        if self.format.planes > 1:
            raise NotImplementedError("support for format %s is not implemented yet\n" % self.format.name)