python-efl/efl/ethumb/efl.ethumb_client.pyx

788 lines
24 KiB
Cython

# Copyright (C) 2007-2016 various contributors (see AUTHORS)
#
# This file is part of Python-EFL.
#
# Python-EFL is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 3 of the License, or (at your option) any later version.
#
# Python-EFL is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this Python-EFL. If not, see <http://www.gnu.org/licenses/>.
"""
:mod:`efl.ethumb_client` Module
###############################
.. versionadded:: 1.17
Classes
=======
.. toctree::
class-ethumb_client.rst
Enumerations
============
.. _Ethumb_Client_Thumb_FDO_Size:
Ethumb_Thumb_FDO_Size
---------------------
.. data:: ETHUMB_THUMB_NORMAL
128x128 as defined by FreeDesktop.Org standard
.. data:: ETHUMB_THUMB_LARGE
256x256 as defined by FreeDesktop.Org standard
.. _Ethumb_Client_Thumb_Format:
Ethumb_Thumb_Format
-------------------
.. data:: ETHUMB_THUMB_FDO
PNG as defined by FreeDesktop.Org standard.
.. data:: ETHUMB_THUMB_JPEG
JPEGs are often smaller and faster to read/write.
.. data:: ETHUMB_THUMB_EET
EFL's own storage system, supports key parameter.
.. _Ethumb_Client_Thumb_Aspect:
Ethumb_Thumb_Aspect
-------------------
.. data:: ETHUMB_THUMB_KEEP_ASPECT
Keep original proportion between width and height
.. data:: ETHUMB_THUMB_IGNORE_ASPECT
Ignore aspect and foce it to match thumbnail's width and height
.. data:: ETHUMB_THUMB_CROP
keep aspect but crop (cut) the largest dimension
.. _Ethumb_Client_Thumb_Orientation:
Ethumb_Thumb_Orientation
------------------------
.. data:: ETHUMB_THUMB_ORIENT_NONE
Keep orientation as pixel data is
.. data:: ETHUMB_THUMB_ROTATE_90_CW
Rotate 90° clockwise
.. data:: ETHUMB_THUMB_ROTATE_180
Rotate 180°
.. data:: ETHUMB_THUMB_ROTATE_90_CCW
Rotate 90° counter-clockwise
.. data:: ETHUMB_THUMB_FLIP_HORIZONTAL
Flip horizontally
.. data:: ETHUMB_THUMB_FLIP_VERTICAL
Flip vertically
.. data:: ETHUMB_THUMB_FLIP_TRANSPOSE
Transpose
.. data:: ETHUMB_THUMB_FLIP_TRANSVERSE
Transverse
.. data:: ETHUMB_THUMB_ORIENT_ORIGINAL
Use orientation from metadata (EXIF-only currently)
Module level functions
======================
"""
from cpython cimport Py_INCREF, Py_DECREF, PyUnicode_AsUTF8String
from libc.stdint cimport uintptr_t
import traceback
import atexit
from efl.utils.conversions cimport _ctouni, _touni
from efl.ethumb_client cimport Ethumb_Thumb_Orientation
cimport efl.ethumb.enums as enums
ETHUMB_THUMB_ORIENT_NONE = enums.ETHUMB_THUMB_ORIENT_NONE
ETHUMB_THUMB_ROTATE_90_CW = enums.ETHUMB_THUMB_ROTATE_90_CW
ETHUMB_THUMB_ROTATE_180 = enums.ETHUMB_THUMB_ROTATE_180
ETHUMB_THUMB_ROTATE_90_CCW = enums.ETHUMB_THUMB_ROTATE_90_CCW
ETHUMB_THUMB_FLIP_HORIZONTAL = enums.ETHUMB_THUMB_FLIP_HORIZONTAL
ETHUMB_THUMB_FLIP_VERTICAL = enums.ETHUMB_THUMB_FLIP_VERTICAL
ETHUMB_THUMB_FLIP_TRANSPOSE = enums.ETHUMB_THUMB_FLIP_TRANSPOSE
ETHUMB_THUMB_FLIP_TRANSVERSE = enums.ETHUMB_THUMB_FLIP_TRANSVERSE
ETHUMB_THUMB_ORIENT_ORIGINAL = enums.ETHUMB_THUMB_ORIENT_ORIGINAL
ETHUMB_THUMB_NORMAL = enums.ETHUMB_THUMB_NORMAL
ETHUMB_THUMB_LARGE = enums.ETHUMB_THUMB_LARGE
ETHUMB_THUMB_FDO = enums.ETHUMB_THUMB_FDO
ETHUMB_THUMB_JPEG = enums.ETHUMB_THUMB_JPEG
ETHUMB_THUMB_EET = enums.ETHUMB_THUMB_EET
ETHUMB_THUMB_KEEP_ASPECT = enums.ETHUMB_THUMB_KEEP_ASPECT
ETHUMB_THUMB_IGNORE_ASPECT = enums.ETHUMB_THUMB_IGNORE_ASPECT
ETHUMB_THUMB_CROP = enums.ETHUMB_THUMB_CROP
cdef void _connect_cb(void *data, Ethumb_Client *client, Eina_Bool success) with gil:
cdef EthumbClient self = <EthumbClient>data
s = bool(success)
try:
func, args, kargs = self._on_connect_callback
func(self, s, *args, **kargs)
except Exception:
traceback.print_exc()
cdef void _on_server_die_cb(void *data, Ethumb_Client *client) with gil:
cdef EthumbClient self = <EthumbClient>data
if self._on_server_die_callback is not None:
try:
func, args, kargs = self._on_server_die_callback
func(self, *args, **kargs)
except Exception:
traceback.print_exc()
self.disconnect()
cdef void _generated_cb(void *data, Ethumb_Client *client, int id, const char *file, const char *key, const char *thumb_path, const char *thumb_key, Eina_Bool success) with gil:
obj = <object>data
(self, func, args, kargs) = obj
status = bool(success != 0)
try:
func(self, id, _ctouni(file), _ctouni(key), _ctouni(thumb_path),
_ctouni(thumb_key), status, *args, **kargs)
except Exception:
traceback.print_exc()
cdef void _generated_cb_free_data(void *data) with gil:
obj = <object>data
Py_DECREF(obj)
cdef void _thumb_exists_cb(void *data, Ethumb_Client *client, Ethumb_Exists *thread, Eina_Bool exists) with gil:
#TODO
print("Not implemented")
def init():
""" Initialize the ethumb_client library.
.. note:: You never need to call this function, it is automatically called
on module import.
"""
return ethumb_client_init()
def shutdown():
""" Shutdown the ethumb_client library.
.. note:: You never need to call this function, it is automatically called
at exit.
"""
ethumb_client_shutdown()
cdef class EthumbClient:
"""
Client for Ethumbd server.
.. versionadded:: 1.17
This client is the recommended way to generate thumbnails with
Ethumb. All you have to do is create a client instance, wait it to
be connected to server, configure thumbnail parameters and then
start feed it with file_set(), exists() generate(). Basic steps are:
- instantiate EthumbClient, wait for func to be called with success.
- set various parameters, like format and size.
- loop on original files:
- ``c.file_set(file)``
- ``if not c.exists(): c.generate(generated_cb)``
It is recommended explicit call to :py:func:`disconnect` function when
you don't need the thumbnailer anymore.
"""
def __init__(self, func, *args, **kargs):
"""
:param func: function to call when connection with server is
established.
:param \*args: Any other parameters will be passed back in the
callback function
:keyword \**kargs: Any other keyword parameters will be passed back
in the callback function
Expected **func** signature::
func(client, status, *args, **kargs)
with status being **True** for successful connection or **False**
on error.
:raise TypeError: if **func** is not callable.
:raise SystemError: if it was not possible to connect to
server, allocate memory or use DBus.
"""
if not callable(func):
raise TypeError("Parameter 'func' must be callable")
if self.obj == NULL:
self._on_connect_callback = (func, args, kargs)
self._on_server_die_callback = None
self.obj = ethumb_client_connect(_connect_cb, <void*>self, NULL)
if self.obj == NULL:
raise SystemError("Error connecting to server.")
else:
ethumb_client_on_server_die_callback_set(
self.obj, _on_server_die_cb, <void*>self, NULL)
def disconnect(self):
"""Explicitly request server disconnection.
After this call object becomes shallow, that is operations
will be void.
"""
if self.obj != NULL:
ethumb_client_disconnect(self.obj)
self.obj = NULL
self._on_connect_callback = None
self._on_server_die_callback = None
def __repr__(self):
f, k = self.file
tf, tk = self.thumb_path
w, h = self.size
format = ("FDO", "JPEG", "EET")[self.format]
aspect = ("KEEP", "IGNORE", "CROP")[self.aspect]
if self.aspect == 2:
aspect = "CROP[%f, %f]" % self.crop
return (
"<%s(obj=%#x, file=(%r, %r), thumb=(%r, %r), "
"size=%dx%d, format=%s, aspect=%s, quality=%d, compress=%d, "
"dir_path=%r, category=%r)>"
) % (
type(self).__name__, <uintptr_t><void *>self, f, k,
tf, tk, w, h, format, aspect, self.quality, self.compress,
self.dir_path, self.category
)
def on_server_die_callback_set(self, func, *args, **kargs):
"""Function to call when server dies.
When server is dead there is nothing to do with this client
anymore, just create a new one and start over, hope that
server could be started and you could generate more
thumbnails.
:param func: function to call when server dies.
Signature::
func(client, *args, **kargs)
:raise TypeError: if **func** is not callable or None.
"""
if func is None:
self._on_server_die_callback = None
elif callable(func):
self._on_server_die_callback = (func, args, kargs)
else:
raise TypeError("Parameter 'func' must be callable or None")
def thumb_exists(self, callback=None, *args, **kwargs):
"""Checks if thumbnail already exists.
If you want to avoid regenerating thumbnails, check if they
already exist with this function.
"""
cdef Ethumb_Client_Thumb_Exists_Cb cb = NULL
cdef Ethumb_Exists *res
if callback:
if not callable(callback):
raise TypeError("callback is not callable")
cb = _thumb_exists_cb
data = (args, kwargs)
res = ethumb_client_thumb_exists(self.obj, cb, <void *>data)
return False
#TODO: handle return value
def generate(self, func, *args, **kargs):
"""Ask EThumb server to generate the specified thumbnail.
Thumbnail generation is asynchronous and depend on ecore main
loop running. Given function will be called back with
generation status if True is returned by this call. If False
is returned, given function will not be called.
Existing thumbnails will be overwritten with this call. Check
if they already exist with :py:func:`exists` before calling.
:param func: function to call on generation completion, even
if failed or succeeded. Signature is::
func(self, id, file, key, thumb_path, thumb_key, status, *args, **kargs)
with status being True for successful generation or
False on failure.
:return: request identifier. Request can be canceled calling
:py:func:`cancel` with given id. If an identifier is returned (>=
0), then func is guaranteed to be called unless it is
explicitly canceled.
:raise TypeError: if **func** is not callable.
:raise SystemError: if could not generate thumbnail, probably
no :py:func:`file_set`.
.. seealso:: :py:func:`cancel`, :py:func:`clear`, :py:func:`exists`
"""
if not callable(func):
raise TypeError("func must be callable")
targs = (self, func, args, kargs)
r = ethumb_client_generate(self.obj, _generated_cb, <void*>targs,
_generated_cb_free_data)
if r >= 0:
Py_INCREF(targs)
return r
else:
raise SystemError("could not generate thumbnail. "
"Did you set the file?")
def generate_cancel(self, int id):
"""Cancel thumbnail request given its id.
Calling this function aborts thumbnail generation and **func**
given to :py:func:`generate` will not be called!
:param id: identifier returned by :py:func:`generate`
"""
ethumb_client_generate_cancel(self.obj, id, NULL, NULL, NULL)
def generate_cancel_all(self):
"""Clear request queue, canceling all generation requests.
This will abort all existing requests, no **func** given to
:py:func:`generate` will be called.
Same as calling :py:func:`cancel` in all exising requests.
"""
ethumb_client_generate_cancel_all(self.obj)
## source file setup
property file:
""" The file to thumbnail.
This is a tuple of 2 strings: ``path`` and ``key``.
For convenience you can also assign a single string value (``path``),
ignoring the key.
:type: **str** or (**str**, **str**)
:param path: path to thumbnail subject.
:param key: path to key inside **path**, this is used to
generate thumbnail of edje groups or images inside EET.
:raise RuntimeError: on failure setting the property
.. note:: setting this property will reset other thumbnail
specifications. This is done to avoid one using the last thumb
path for new images.
"""
def __set__(self, value):
if isinstance(value, tuple):
path, key = value
else:
path, key = value, None
if isinstance(path, unicode): path = PyUnicode_AsUTF8String(path)
if isinstance(key, unicode): key = PyUnicode_AsUTF8String(key)
if ethumb_client_file_set(self.obj,
<const char *>path if path is not None else NULL,
<const char *>key if key is not None else NULL) == 0:
raise RuntimeError("Cannot set file")
def __get__(self):
cdef:
const char *path
const char *key
ethumb_client_file_get(self.obj, &path, &key)
return (_ctouni(path), _ctouni(key))
def file_free(self):
"""Zero/Reset file parameters.
This call will reset file and thumb specifications.
.. seealso:: :py:func:`file_set` and :py:func:`thumb_set`
"""
ethumb_client_file_free(self.obj)
property frame:
""" The optional edje file used to generate a frame around the thumbnail
This will create an edje object that will have image swallowed
in. This can be used to simulate Polaroid or wood frames in
the generated image. Remember it is bad to modify the original
contents of thumbnails, but sometimes it's useful to have it
composited and avoid runtime overhead.
:type: (**str**, **str**, **str**) **writeonly**
:param file: file path to edje.
:param group: group inside edje to use.
:param swallow: name of swallow part.
:raise RuntimeError: on failure setting the property
"""
def __set__(self, tuple value):
theme, group, swallow = value
if isinstance(theme, unicode): theme = PyUnicode_AsUTF8String(theme)
if isinstance(group, unicode): group = PyUnicode_AsUTF8String(group)
if isinstance(swallow, unicode): swallow = PyUnicode_AsUTF8String(swallow)
if ethumb_client_frame_set(self.obj,
<const char *>theme if theme is not None else NULL,
<const char *>group if group is not None else NULL,
<const char *>swallow if swallow is not None else NULL) == 0:
raise RuntimeError("Cannot set frame")
## fine tune setup
property fdo:
""" Configure future requests to use FreeDesktop.Org preset.
This is a preset to provide freedesktop.org (fdo) standard
compliant thumbnails. That is, files are stored as JPEG under
~/.thumbnails/SIZE, with size being either normal (128x128) or
large (256x256).
:type: :ref:`Ethumb_Client_Thumb_FDO_Size` **writeonly**
.. seealso:: :attr:`size`, :attr:`format`, :attr:`aspect`,
:attr:`crop_align`, :attr:`category`, :attr:`dir_path`.
"""
def __set__(self, Ethumb_Thumb_FDO_Size value):
ethumb_client_fdo_set(self.obj, value)
property size:
""" The (custom) size of thumbnails.
:type: (int **w**, int **w**)
:param w: width, default is 128.
:param h: height, default is 128.
"""
def __set__(self, tuple value):
w, h = value
ethumb_client_size_set(self.obj, w, h)
def __get__(self):
cdef int w, h
ethumb_client_size_get(self.obj, &w, &h)
return w, h
property format:
""" The fileformat for the thumbnails.
Thumbnails are compressed; possible formats are PNG, JPEG and EET.
:type: :ref:`Ethumb_Client_Thumb_Format`
"""
def __set__(self, Ethumb_Thumb_Format value):
ethumb_client_format_set(self.obj, value)
def __get__(self):
return ethumb_client_format_get(self.obj)
property aspect:
""" The aspect ratio policy.
If aspect is kept (ETHUMB_THUMB_KEEP_ASPECT), then image will
be rescaled so the largest dimension is not bigger than it's
specified size (see :py:func:`size_get`) and the other dimension is
resized in the same proportion. Example: size is 256x256,
image is 1000x500, resulting thumbnail is 256x128.
If aspect is ignored (ETHUMB_THUMB_IGNORE_ASPECT), then image
will be distorted to match required thumbnail size. Example:
size is 256x256, image is 1000x500, resulting thumbnail is
256x256.
If crop is required (ETHUMB_THUMB_CROP), then image will be
cropped so the smallest dimension is not bigger than its
specified size (see :py:func:`size_get`) and the other dimension
will overflow, not being visible in the final image. How it
will overflow is speficied by :py:func:`crop_set`
alignment. Example: size is 256x256, image is 1000x500, crop
alignment is 0.5, 0.5, resulting thumbnail is 256x256 with 250
pixels from left and 250 pixels from right being lost, that is
just the 500x500 central pixels of image will be considered
for scaling.
:type: :ref:`Ethumb_Client_Thumb_Aspect`
"""
def __set__(self, Ethumb_Thumb_Aspect value):
ethumb_client_aspect_set(self.obj, value)
def __get__(self):
return ethumb_client_aspect_get(self.obj)
property orientation:
""" The thumbnail rotation or flip.
:type: :ref:`Ethumb_Client_Thumb_Orientation`
"""
def __set__(self, Ethumb_Thumb_Orientation value):
ethumb_client_orientation_set(self.obj, value)
def __get__(self):
return ethumb_client_orientation_get(self.obj)
property crop_align:
""" Crop alignment in use.
:param x: horizontal alignment. 0.0 means left side will be
visible or right side is being lost. 1.0 means right side
will be visible or left side is being lost. 0.5 means just
center is visible, both sides will be lost. Default is 0.5.
:param y: vertical alignment. 0.0 is top visible, 1.0 is
bottom visible, 0.5 is center visible. Default is 0.5
:type: (float **x**, float **y**)
"""
def __set__(self, tuple value):
x, y = value
ethumb_client_crop_align_set(self.obj, x, y)
def __get__(self):
cdef float x, y
ethumb_client_crop_align_get(self.obj, &x, &y)
return x, y
property quality:
""" The thumbnail compression quality.
Value from 0 to 100, default is 80. The effect depends on the format
being used, PNG will not use it.
:type: int
"""
def __set__(self, int value):
ethumb_client_quality_set(self.obj, value)
def __get__(self):
return ethumb_client_quality_get(self.obj)
property compress:
""" The thumbnail compression rate.
Value from 0 to 9, default is 9. The effect depends on the format being
used, JPEG will not use it.
:type: int
"""
def __set__(self, int value):
ethumb_client_compress_set(self.obj, value)
def __get__(self):
return ethumb_client_compress_get(self.obj)
property dir_path:
""" Configure where to store thumbnails in future requests.
This is the base folder, a category folder is added to this path
as a sub directory. Default is ``~/.thumbnails``
:type: **str**
"""
def __set__(self, path):
if isinstance(path, unicode): path = PyUnicode_AsUTF8String(path)
ethumb_client_dir_path_set(self.obj,
<const char *>path if path is not None else NULL)
def __get__(self):
cdef const char *path
path = ethumb_client_dir_path_get(self.obj)
return _ctouni(path)
property category:
""" Category directory to store thumbnails.
Category sub directory to store thumbnail. Default is either "normal"
or "large" for FDO compliant thumbnails or
``WIDTHxHEIGHT-ASPECT[-FRAMED]-FORMAT``. It can be a string or None to
use auto generated names.
:type: **str**
"""
def __set__(self, cat):
if isinstance(cat, unicode): cat = PyUnicode_AsUTF8String(cat)
ethumb_client_category_set(self.obj,
<const char *>cat if cat is not None else NULL)
def __get__(self):
return _ctouni(ethumb_client_category_get(self.obj))
property thumb_path:
""" The complete path of the generated thumbnail.
This is a tuple of 2 strings: ``path`` and ``key``.
For convenience you can also assign a single string value (``path``),
ignoring the key.
:type: **str** or (**str**, **str**)
:param path: path to generated thumbnail to use, this is an
absolute path to file, overriding directory and category.
:param key: path to key inside **path**, this is used to
generate thumbnail inside EET files.
"""
def __set__(self, value):
if isinstance(value, tuple):
path, key = value
else:
path, key = value, None
if isinstance(path, unicode): path = PyUnicode_AsUTF8String(path)
if isinstance(key, unicode): key = PyUnicode_AsUTF8String(key)
ethumb_client_thumb_path_set(self.obj,
<const char *>path if path is not None else NULL,
<const char *>key if key is not None else NULL)
def __get__(self):
cdef:
const char *path
const char *key
ethumb_client_thumb_path_get(self.obj, &path, &key)
return (_ctouni(path), _ctouni(key))
## video setup
property video_time:
""" The video time (duration) in seconds.
:type: float (**readonly**)
"""
def __set__(self, float value):
ethumb_client_video_time_set(self.obj, value)
property video_start:
""" The start point for video thumbnails.
:type: float (from 0.0 to 1.0) (**readonly**)
"""
def __set__(self, float value):
ethumb_client_video_start_set(self.obj, value)
property video_interval:
""" The video frame interval, in seconds.
This is useful for animated thumbnail and will define skip time before
going to the next frame.
.. note:: that video backends might not be able to
precisely skip that amount as it will depend on various
factors, including video encoding.
:type: float (**readonly**)
"""
def __set__(self, float value):
ethumb_client_video_interval_set(self.obj, value)
property video_ntimes:
""" The number of times the video loops (if applicable).
:type: int (**readonly**)
"""
def __set__(self, int value):
ethumb_client_video_ntimes_set(self.obj, value)
property video_fps:
""" The thumbnail framerate.
Default to 10.
:type: int (**readonly**)
"""
def __set__(self, int value):
ethumb_client_video_fps_set(self.obj, value)
## document setup
property document_page:
""" The page number to thumbnail in paged documents.
:type: int
"""
def __set__(self, int value):
ethumb_client_document_page_set(self.obj, value)
init()
atexit.register(shutdown)