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svg/
src/resources.py
###Python###
# Byte-compiled / optimized / DLL files
__pycache__/
*.py[cod]
*$py.class
# C extensions
*.so
# Distribution / packaging
.Python
build/
develop-eggs/
dist/
downloads/
eggs/
.eggs/
lib/
lib64/
parts/
sdist/
var/
wheels/
*.egg-info/
.installed.cfg
*.egg
MANIFEST
# PyInstaller
# Usually these files are written by a python script from a template
# before PyInstaller builds the exe, so as to inject date/other infos into it.
*.manifest
*.spec
# Installer logs
pip-log.txt
pip-delete-this-directory.txt
# pyenv
.python-version
# Environments
.env
.venv
env/
venv/
ENV/
env.bak/
venv.bak/

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<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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# rMview: a fast live viewer for reMarkable
## Instructions
To run the program you need python with pyqt5 installed.
Before running the program the first time, generate the resource file with
pyrcc5 -o src/resources.py resources.qrc
Then you can invoke the program with
python src/rmview.py [config]
the optional `config` parameter is the filename of a json configuration file.
If the parameter is not found, the program will look for a `rmview.json` file in the current directory, or, if not found, for the path stored in the environment variable `RMVIEW_CONF`.
If none are found, or if the configuration is underspecified, the tool is going to prompt for address/password.
The supported configuration settings are:
```json
{ // all settings are optional, comments not allowed
"ssh": {
"address": "10.11.99.1", // works over WiFi too!
"username": "root",
"key": "~/.ssh/id_rsa_remarkable",
// alternatively to key, "password": "****" is supported
"timeout": 1 // in seconds
},
"orientation": "portrait", // default: landscape
"pen_size": 10,
"pen_color": "red",
"fetch_frame_delay": 0.03 // sleep 0.03s on remarkable before fetching new frame (default is no delay)
}
```
## Requirements
- Python 3
- PyQt5
- Paramiko
- lz4framed
They can be installed via `pip install pyqt5 paramiko lz4framed`.
## To Do
- [ ] Settings dialog
- [ ] About dialog
- [ ] Pause stream of screen/pen
- [ ] Action to spawn a static viewer on a frame
- [ ] Build system
- [ ] Bundle
## Credits
I took inspiration from the following projects:
- [QtImageViewer](https://github.com/marcel-goldschen-ohm/PyQtImageViewer/)
- [remarkable_mouse](https://github.com/Evidlo/remarkable_mouse/)
- [reStream](https://github.com/rien/reStream)
Icons adapted from designs by Freepik, xnimrodx from [www.flaticon.com][]
## Licence
GPLv3

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<?xml version="1.0" encoding="UTF-8"?>
<svg width="532.49" height="582.51" version="1.1" viewBox="0 0 532.49 582.51" xmlns="http://www.w3.org/2000/svg" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
<metadata>
<rdf:RDF>
<cc:Work rdf:about="">
<dc:format>image/svg+xml</dc:format>
<dc:type rdf:resource="http://purl.org/dc/dcmitype/StillImage"/>
<dc:title/>
</cc:Work>
</rdf:RDF>
</metadata>
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lz4.arm.static Executable file
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resources.qrc Normal file
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<!DOCTYPE RCC><RCC version="1.0">
<qresource>
<file>assets/rmview.svg</file>
<file>assets/tablet.svg</file>
<file>assets/dead.svg</file>
</qresource>
</RCC>

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81
src/connection.py Normal file
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# from PyQt5.QtGui import *
# from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
import paramiko
import struct
import time
import sys
import os
import logging
log = logging.getLogger('rmview')
class rMConnectSignals(QObject):
onConnect = pyqtSignal(object)
onError = pyqtSignal(Exception)
class rMConnect(QRunnable):
_exception = None
def __init__(self, address='10.11.99.1', username='root', password=None, key=None, timeout=1, onConnect=None, onError=None):
super(rMConnect, self).__init__()
self.address = address
self.signals = rMConnectSignals()
if callable(onConnect):
self.signals.onConnect.connect(onConnect)
if callable(onError):
self.signals.onError.connect(onError)
# self.key = key
try:
self.client = paramiko.SSHClient()
if key is not None:
self.client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
key = os.path.expanduser(key)
try:
pkey = paramiko.RSAKey.from_private_key_file(key)
except paramiko.ssh_exception.PasswordRequiredException:
passphrase, ok = QInputDialog.getText(self.viewer, "Configuration","SSH key passphrase:", QLineEdit.Password)
if ok:
pkey = paramiko.RSAKey.from_private_key_file(key, password=passphrase)
else:
raise Exception("A passphrase for SSH key is required")
else:
pkey = None
if password is None:
raise Exception("Must provide either password or SSH key")
self.options = {
'username': username,
'password': password,
'pkey': pkey,
'timeout': timeout,
'look_for_keys': False
}
except Exception as e:
self._exception = e
@pyqtSlot()
def run(self):
if self._exception is not None:
self.signals.onError.emit(self._exception)
log.debug('Aborting connection: %s', self._exception)
return
try:
log.info('Connecting...') # pkey=key,
self.client.connect(self.address, **self.options)
log.info("Connected to {}".format(self.address))
self.signals.onConnect.emit(self.client)
except Exception as e:
log.error("Could not connect to %s: %s", self.options.get('address'), e)
log.info("Please check your remarkable is connected and retry.")
self.signals.onError.emit(e)
log.debug('Stopping connection worker')

21
src/rmparams.py Normal file
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WIDTH = 1408
HEIGHT = 1872
PIXELS_NUM = WIDTH * HEIGHT
TOTAL_BYTES = PIXELS_NUM * 2
# evtype_sync = 0
# evtype_key = 1
e_type_abs = 3
# evcode_stylus_distance = 25
# evcode_stylus_xtilt = 26
# evcode_stylus_ytilt = 27
e_code_stylus_xpos = 1
e_code_stylus_ypos = 0
e_code_stylus_pressure = 24
# evcode_finger_xpos = 53
# evcode_finger_ypos = 54
# evcode_finger_pressure = 58
stylus_width = 15725
stylus_height = 20951

183
src/rmview.py Normal file
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from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
import resources
from workers import FrameBufferWorker, PointerWorker
from connection import rMConnect
from viewer import QtImageViewer
from rmparams import *
import sys
import os
import json
import logging
logging.basicConfig(format='%(message)s')
log = logging.getLogger('rmview')
class rMViewApp(QApplication):
config_file = None
config = {}
viewer = None
fbworker = None
penworker = None
ssh = None
pen = None
pen_size = 15
def __init__(self, args):
super(rMViewApp, self).__init__(args)
config_files = [] if len(args) < 2 else [args[1]]
config_files += ['rmview.json', os.environ.get("RMVIEW_CONF")]
log.info("Searching configuration in " + ', '.join(config_files))
for f in config_files:
try:
with open(os.path.expanduser(f)) as config_file:
self.config = json.load(config_file)
self.config_file = config_file
log.info("Fetching configuration from " + f)
break
except Exception as e:
log.debug("Configuration failure in %s: %s" % (f, e))
pass
self.config.setdefault('ssh', {})
self.pen_size = self.config.get('pen_size', self.pen_size)
self.setWindowIcon(QIcon(':/assets/rmview.svg'))
self.viewer = QtImageViewer()
self.viewer.setWindowTitle("rMview")
self.viewer.resize(QDesktopWidget().availableGeometry(self.viewer).size() * 0.7);
if self.config.get('orientation', 'landscape') == 'landscape':
self.viewer.rotateCW()
self.viewer.show()
# bar = QMenuBar()
# menu = bar.addMenu('&View')
# act = QAction('Rotate clockwise', self)
# act.setShortcut('Ctrl+Right')
# act.triggered.connect(self.viewer.rotateCW)
# menu.addAction(act)
# act = QAction('Rotate counter-clockwise', self)
# act.setShortcut('Ctrl+Left')
# act.triggered.connect(self.viewer.rotateCCW)
# menu.addAction(act)
# menu.addSeparator()
# act = QAction('Save screenshot', self)
# act.setShortcut('Ctrl+S')
# act.triggered.connect(self.viewer.screenshot)
self.ensureConnConfig()
self.threadpool = QThreadPool()
self.requestConnect()
self.aboutToQuit.connect(self.joinWorkers)
ecode = self.exec_()
print('\nBye!')
sys.exit(ecode)
def ensureConnConfig(self):
if self.config['ssh'].get('address') is None:
address, ok = QInputDialog.getText(self.viewer, "Configuration","IP Address of your reMarkable:", QLineEdit.Normal, "10.11.99.1")
if ok and address:
self.config['ssh']['address'] = address
else:
self.quit()
if self.config['ssh'].get('password') is None and self.config['ssh'].get('key') is None:
password, ok = QInputDialog.getText(self.viewer, "Configuration","reMarkable password:", QLineEdit.Password)
if ok:
self.config['ssh']['password'] = password or ""
else:
self.quit()
log.info(self.config)
def requestConnect(self):
self.viewer.setWindowTitle("rMview - Connecting...")
self.threadpool.start(
rMConnect(**self.config.get('ssh'),
onError=self.connectionError,
onConnect=self.connected ) )
@pyqtSlot()
def joinWorkers(self):
if self.penworker is not None:
self.penworker.stop()
if self.fbworker is not None:
self.fbworker.stop()
if self.ssh is not None:
self.ssh.close()
self.threadpool.waitForDone()
@pyqtSlot(object)
def connected(self, ssh):
self.ssh = ssh
self.viewer.setWindowTitle("rMview - " + self.config.get('ssh').get('address'))
self.fbworker = FrameBufferWorker(ssh, delay=self.config.get('fetch_frame_delay'))
self.fbworker.signals.onNewFrame.connect(lambda image: self.viewer.setImage(image))
self.fbworker.signals.onFatalError.connect(self.frameError)
self.threadpool.start(self.fbworker)
self.penworker = PointerWorker(ssh)
self.threadpool.start(self.penworker)
self.pen = self.viewer.scene.addEllipse(0,0,self.pen_size,self.pen_size,
pen=QPen(QColorConstants.White),
brush=QBrush(QColor(self.config.get('pen_color', 'red'))))
self.pen.hide()
self.pen.setZValue(100)
self.penworker.signals.onPenMove.connect(self.movePen)
self.penworker.signals.onPenLift.connect(self.pen.show)
self.penworker.signals.onPenPress.connect(self.pen.hide)
@pyqtSlot(int, int)
def movePen(self, x, y):
y = 20951 - y
ratio_width, ratio_height = WIDTH / 15725, HEIGHT / 20951
scaling = ratio_width if ratio_width > ratio_height else ratio_height
x = scaling * (x - (15725 - WIDTH / scaling) / 2)
y = scaling * (y - (20951 - HEIGHT / scaling) / 2)
self.pen.setRect(x,y,self.pen_size,self.pen_size)
@pyqtSlot(Exception)
def connectionError(self, e):
self.viewer.setWindowTitle("rMview - Could not connect!")
log.error(e)
mbox = QMessageBox(QMessageBox.NoIcon, 'Connection error', "Connection attempt failed", parent=self.viewer)
icon = QPixmap(":/assets/dead.svg")
icon.setDevicePixelRatio(self.devicePixelRatio())
mbox.setIconPixmap(icon)
mbox.setInformativeText("I could not connect to the reMarkable at %s:\n%s." % (self.config.get('ssh').get('address'), e))
mbox.addButton(QMessageBox.Cancel)
# mbox.addButton("Settings...", QMessageBox.ResetRole)
mbox.addButton(QMessageBox.Retry)
mbox.setDefaultButton(QMessageBox.Retry)
answer = mbox.exec()
if answer == QMessageBox.Retry:
self.requestConnect()
elif answer == QMessageBox.Cancel:
self.quit()
else:
# self.open_settings()
self.quit()
@pyqtSlot(Exception)
def frameError(self, e):
QMessageBox.critical(self.viewer, "Error", 'Please check your reMarkable is properly configured and with LZ4 installed.\n\n%s' % e)
self.quit()
if __name__ == '__main__':
log.setLevel(logging.INFO)
QCoreApplication.setAttribute(Qt.AA_EnableHighDpiScaling)
rMViewApp(sys.argv)

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""" QtImageViewer.py: PyQt image viewer widget for a QPixmap in a QGraphicsView scene with mouse zooming and panning.
"""
from PyQt5.QtCore import Qt, QRectF, pyqtSignal, QT_VERSION_STR
from PyQt5.QtGui import QImage, QPixmap, QTransform
from PyQt5.QtWidgets import QGraphicsView, QGraphicsScene, QFileDialog, QAction, QMenu
class QtImageViewer(QGraphicsView):
def __init__(self):
QGraphicsView.__init__(self)
self.setAttribute(Qt.WA_OpaquePaintEvent, True)
self.scene = QGraphicsScene()
self.setScene(self.scene)
self._pixmap = None
self.aspectRatioMode = Qt.KeepAspectRatio
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAsNeeded)
self.setVerticalScrollBarPolicy(Qt.ScrollBarAsNeeded)
self.setAlignment(Qt.AlignCenter)
self.menu = QMenu(self)
act = QAction('Fit to view', self)
# act.setShortcut('Ctrl+S')
act.triggered.connect(lambda: self.setFit(True))
self.menu.addAction(act)
act = QAction('Rotate clockwise', self)
# act.setShortcut('Ctrl+Right')
act.triggered.connect(self.rotateCW)
self.menu.addAction(act)
act = QAction('Rotate counter-clockwise', self)
# act.setShortcut('Ctrl+Left')
act.triggered.connect(self.rotateCCW)
self.menu.addAction(act)
self.menu.addSeparator()
act = QAction('Save screenshot', self)
# act.setShortcut('Ctrl+S')
act.triggered.connect(self.screenshot)
self.menu.addAction(act)
self._fit = True
self._rotation = 0 # used to produce a rotated screenshot
def contextMenuEvent(self, event):
self.menu.exec_(self.mapToGlobal(event.pos()))
def hasImage(self):
return self._pixmap is not None
def clearImage(self):
if self.hasImage():
self.scene.removeItem(self._pixmap)
self._pixmap = None
def pixmap(self):
if self.hasImage():
return self._pixmap.pixmap()
return None
def image(self):
if self.hasImage():
return self._pixmap.pixmap().toImage()
return None
def setImage(self, image):
if type(image) is QPixmap:
pixmap = image
elif type(image) is QImage:
pixmap = QPixmap.fromImage(image)
else:
raise RuntimeError("ImageViewer.setImage: Argument must be a QImage or QPixmap.")
if self.hasImage():
self._pixmap.setPixmap(pixmap)
else:
self._pixmap = self.scene.addPixmap(pixmap)
self._pixmap.setZValue(-1)
self.setSceneRect(QRectF(pixmap.rect())) # Set scene size to image size.
# self.fitInView(self.sceneRect(), self.aspectRatioMode) # Show entire image (use current aspect ratio mode).
self.updateViewer()
def updateViewer(self):
if self.hasImage() is None:
return
if self._fit:
self.fitInView(self.sceneRect(), self.aspectRatioMode)
# else:
def resizeEvent(self, event):
self.updateViewer()
def mouseDoubleClickEvent(self, event):
# scenePos = self.mapToScene(event.pos())
if event.button() == Qt.LeftButton:
self._fit=True
self.updateViewer()
# self.leftMouseButtonDoubleClicked.emit(scenePos.x(), scenePos.y())
# elif event.button() == Qt.RightButton:
# self.rightMouseButtonDoubleClicked.emit(scenePos.x(), scenePos.y())
QGraphicsView.mouseDoubleClickEvent(self, event)
def wheelEvent(self, event):
if event.modifiers() == Qt.NoModifier:
QGraphicsView.wheelEvent(self, event)
else:
self._fit = False
# Zoom Factor
zoomInFactor = 1.25
zoomOutFactor = 1 / zoomInFactor
# Set Anchors
self.setTransformationAnchor(QGraphicsView.NoAnchor)
self.setResizeAnchor(QGraphicsView.NoAnchor)
# Save the scene pos
oldPos = self.mapToScene(event.pos())
# Zoom
if event.angleDelta().y() > 0:
zoomFactor = zoomInFactor
else:
zoomFactor = zoomOutFactor
self.scale(zoomFactor, zoomFactor)
# Get the new position
newPos = self.mapToScene(event.pos())
# Move scene to old position
delta = newPos - oldPos
self.translate(delta.x(), delta.y())
def screenshot(self):
img = self.image()
if img is not None:
fileName, ok = QFileDialog.getSaveFileName(self, "Save screenshot...", "rm-screenshot.png")
if ok and fileName:
print(self._rotation)
img = img.transformed(QTransform().rotate(self._rotation));
img.save(fileName)
def rotateCW(self):
self.rotate(90)
self._rotation += 90
self.updateViewer()
def rotateCCW(self):
self.rotate(-90)
self._rotation -= 90
self.updateViewer()
def setFit(self, f):
self._fit = f
self.updateViewer()
def keyPressEvent(self, event):
if event.key() == Qt.Key_Left:
self.rotateCCW()
elif event.key() == Qt.Key_Right:
self.rotateCW()
elif event.key() == Qt.Key_1:
self.setFit(True)
elif event.key() == Qt.Key_S:
self.screenshot()

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from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from rmparams import *
import paramiko
import struct
import time
import sys
import os
import logging
log = logging.getLogger('rmview')
from lz4framed import Decompressor, Lz4FramedNoDataError
SHOW_FPS = True
class FBWSignals(QObject):
onFatalError = pyqtSignal(Exception)
onNewFrame = pyqtSignal(QImage)
class FrameBufferWorker(QRunnable):
_stop = False
def __init__(self, ssh, delay=None):
super(FrameBufferWorker, self).__init__()
self._read_loop = """\
while dd if=/dev/fb0 count=1 bs={bytes} 2>/dev/null; do {delay}; done | $HOME/lz4
""".format(bytes=TOTAL_BYTES, delay="sleep "+str(delay) if delay else "true")
self.ssh = ssh
self.signals = FBWSignals()
def stop(self):
self._stop = True
@pyqtSlot()
def run(self):
_, rmstream, rmerr = self.ssh.exec_command(self._read_loop)
data = b''
pix = None
if SHOW_FPS:
f = 0
t = time.perf_counter()
fps = 0
try:
for chunk in Decompressor(rmstream):
data += chunk
while len(data) >= TOTAL_BYTES:
new_pix = data[:TOTAL_BYTES]
data = data[TOTAL_BYTES:]
if new_pix != pix:
self.signals.onNewFrame.emit(QImage(new_pix, WIDTH, HEIGHT, WIDTH * 2, QImage.Format_Grayscale16))
# Format_RGB16 works too but has slower performance?
pix = new_pix
if SHOW_FPS:
f += 1
if f % 10 == 0:
fps = 10 / (time.perf_counter() - t)
t = time.perf_counter()
print("FRAME %d | FPS %.3f\r" % (f, fps), end='')
if self._stop:
log.debug('Stopping framebuffer worker')
break
except Lz4FramedNoDataError:
e = rmerr.read().decode('ascii')
if rmstream.channel.recv_exit_status() == 127:
log.info("Check if your remarkable has lz4 installed! %s", e)
self.signals.onFatalError.emit(Exception(e))
except Exception as e:
log.error("Error: %s %s", type(e), e)
self.signals.onFatalError.emit(e)
class PWSignals(QObject):
onFatalError = pyqtSignal(Exception)
onPenMove = pyqtSignal(int, int)
onPenPress = pyqtSignal()
onPenLift = pyqtSignal()
LIFTED = 0
PRESSED = 1
class PointerWorker(QRunnable):
_stop = False
def __init__(self, ssh, threshold=1000):
super(PointerWorker, self).__init__()
self.ssh = ssh
self.threshold = threshold
self.signals = PWSignals()
def stop(self):
self._stop = True
@pyqtSlot()
def run(self):
_, penstream, _ = self.ssh.exec_command('cat /dev/input/event0')
new_x = new_y = False
state = LIFTED
while not self._stop:
try:
_, _, e_type, e_code, e_value = struct.unpack('2IHHi', penstream.read(16))
except struct.error:
return
except Exception as e:
print('Error in pointer worker: %s %s', type(e), e)
return
# decoding adapted from remarkable_mouse
if e_type == e_type_abs:
# handle x direction
if e_code == e_code_stylus_xpos:
x = e_value
new_x = True
# handle y direction
if e_code == e_code_stylus_ypos:
y = e_value
new_y = True
# handle draw
if e_code == e_code_stylus_pressure:
if e_value > self.threshold:
if state == LIFTED:
log.debug('PRESS')
state = PRESSED
self.signals.onPenPress.emit()
else:
if state == PRESSED:
log.debug('RELEASE')
state = LIFTED
self.signals.onPenLift.emit()
if new_x and new_y:
self.signals.onPenMove.emit(x, y)
new_x = new_y = False