def available():
if os.path.exists('/opt/vc/bin/tvservice'):
cea = json.loads(
debug.subprocess_check_output(
['/opt/vc/bin/tvservice', '-j', '-m', 'CEA'],
stderr=subprocess.STDOUT))
dmt = json.loads(
debug.subprocess_check_output(
['/opt/vc/bin/tvservice', '-j', '-m', 'DMT'],
stderr=subprocess.STDOUT))
else:
logging.error(
'/opt/vc/bin/tvservice is missing! No HDMI resolutions will be available'
)
cea = []
dmt = []
result = []
for entry in cea:
entry['mode'] = 'CEA'
entry['depth'] = 32
entry['reverse'] = True
result.append(entry)
for entry in dmt:
entry['mode'] = 'DMT'
entry['depth'] = 32
entry['reverse'] = True
result.append(entry)
internal = display._internaldisplay()
if internal:
logging.info('Internal display detected')
result.append(internal)
# Finally, sort by pixelcount
return sorted(result, key=lambda k: k['width'] * k['height'])
def current(self):
result = None
if self.isHDMI() and os.path.exists('/opt/vc/bin/tvservice'):
output = debug.subprocess_check_output(
['/opt/vc/bin/tvservice', '-s'], stderr=subprocess.STDOUT)
# state 0x120006 [DVI DMT (82) RGB full 16:9], 1920x1080 @ 60.00Hz, progressive
m = re.search(
'state 0x[0-9a-f]* \[([A-Z]*) ([A-Z]*) \(([0-9]*)\) [^,]*, ([0-9]*)x([0-9]*) \@ ([0-9]*)\.[0-9]*Hz, (.)',
output)
if m is None:
return None
result = {
'mode': m.group(2),
'code': int(m.group(3)),
'width': int(m.group(4)),
'height': int(m.group(5)),
'rate': int(m.group(6)),
'aspect_ratio': '',
'scan': m.group(7),
'3d_modes': [],
'depth': 32,
'reverse': True,
}
else:
result = display._internaldisplay()
return result
def _isDPI():
if os.path.exists('/opt/vc/bin/tvservice'):
output = debug.subprocess_check_output(
['/opt/vc/bin/tvservice', '-s'], stderr=subprocess.STDOUT)
else:
output = ''
return '[LCD]' in output
def _internaldisplay():
entry = {
'mode': 'INTERNAL',
'code': None,
'width': 0,
'height': 0,
'rate': 60,
'aspect_ratio': '',
'scan': '(internal)',
'3d_modes': [],
'reverse': False
}
device = '/dev/fb1'
if not os.path.exists(device):
if display._isDPI():
device = '/dev/fb0'
else:
device = None
if device:
info = debug.subprocess_check_output(
['/bin/fbset', '-fb', device],
stderr=subprocess.STDOUT).split('\n')
for line in info:
line = line.strip()
if line.startswith('geometry'):
parts = line.split(' ')
entry['width'] = int(parts[1])
entry['height'] = int(parts[2])
entry['depth'] = int(parts[5])
entry['code'] = int(device[-1])
# rgba 8/16,8/8,8/0,8/24 <== Detect rgba order
if line.startswith('rgba'):
m = re.search(
'rgba [0-9]*/([0-9]*),[0-9]*/([0-9]*),[0-9]*/([0-9]*),[0-9]*/([0-9]*)',
line)
if m is None:
logging.error('fbset output has changed, cannot parse')
return None
entry['reverse'] = m.group(1) != 0
if entry['code'] is not None:
logging.debug('Internal display: ' + repr(entry))
return entry
return None
def get(self):
if self.enabled:
args = [
'convert', '-depth', '8', '-size',
'%dx%d' %
(self.width + self.xoffset, self.height + self.yoffset),
'%s:-' % (self.format), 'jpg:-'
]
else:
args = [
'convert', '-size',
'%dx%d' % (640, 360), '-background', 'black', '-fill', 'white',
'-gravity', 'center', '-weight', '700', '-pointsize', '32',
'label:%s' % "Display off", '-depth', '8', 'jpg:-'
]
if not self.enabled:
result = debug.subprocess_check_output(args, stderr=self.void)
elif self.depth in [24, 32]:
device = self.getDevice()
if self.emulate:
device = '/tmp/fb.bin'
with open(device, 'rb') as fb:
pip = subprocess.Popen(args,
stdin=fb,
stdout=subprocess.PIPE,
stderr=self.void)
result = pip.communicate()[0]
elif self.depth == 16:
with open(self.getDevice(), 'rb') as fb:
src = subprocess.Popen(
['/root/photoframe/rgb565/rgb565', 'reverse'],
stdout=subprocess.PIPE,
stdin=fb,
stderr=self.void)
pip = subprocess.Popen(args,
stdin=src.stdout,
stdout=subprocess.PIPE)
src.stdout.close()
result = pip.communicate()[0]
else:
logging.error('Do not know how to grab this kind of framebuffer')
return (result, 'image/jpeg')