def _to_display(self, arguments):
device = self.getDevice()
if self.emulate:
device = '/tmp/fb.bin'
self.depth = 32
if self.depth in [24, 32]:
with open(device, 'wb') as f:
debug.subprocess_call(arguments, stdout=f, stderr=self.void)
elif self.depth == 16: # Typically RGB565
# For some odd reason, cannot pipe the output directly to the framebuffer, use temp file
with open(device, 'wb') as fb:
src = subprocess.Popen(arguments,
stdout=subprocess.PIPE,
stderr=self.void)
pip = subprocess.Popen(['/root/photoframe/rgb565/rgb565'],
stdin=src.stdout,
stdout=fb)
src.stdout.close()
pip.communicate()
else:
logging.error('Do not know how to render this, depth is %d',
self.depth)
self.lastMessage = None
def clear(self):
if self.emulate:
self.message('')
return
with open(self.getDevice(), 'wb') as f:
debug.subprocess_call(['cat', '/dev/zero'],
stdout=f,
stderr=self.void)
def enable(self, enable, force=False):
if enable == self.enabled and not force:
return
# Do not do things if we don't know how to display
if self.params is None:
return
if enable:
if self.isHDMI():
if force: # Make sure display is ON and set to our preference
if os.path.exists('/opt/vc/bin/tvservice'):
debug.subprocess_call(
['/opt/vc/bin/tvservice', '-e', self.params],
stderr=self.void,
stdout=self.void)
time.sleep(1)
debug.subprocess_call(
['/bin/fbset', '-fb',
self.getDevice(), '-depth', '8'],
stderr=self.void)
debug.subprocess_call([
'/bin/fbset', '-fb',
self.getDevice(), '-depth',
str(self.depth), '-xres',
str(self.width), '-yres',
str(self.height), '-vxres',
str(self.width), '-vyres',
str(self.height)
],
stderr=self.void)
else:
debug.subprocess_call(
['/usr/bin/vcgencmd', 'display_power', '1'],
stderr=self.void)
else:
self.clear()
if self.isHDMI():
debug.subprocess_call(
['/usr/bin/vcgencmd', 'display_power', '0'],
stderr=self.void)
self.enabled = enable
