buffer.py 文件源码

def prime_import(cls, drm, fd, format_, width, height):
        arg = DrmPrimeHandleC()
        arg.fd = fd
        fcntl.ioctl(drm.fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, arg)

        self = cls(drm, format_, width, height)
        self._arg = arg
        self.fd = fd
        self.id = int(arg.handle)
        self.pitch = self.format.cpp[0] * width
        self.len = height * self.pitch

        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)

        return self