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# -*- mode: python; coding: utf-8 -*-
#
# Pigment Python binding cloning example
#
# Copyright © 2006, 2007, 2008 Fluendo Embedded S.L.
#
# This library 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 2 of the License, or (at your option) any later version.
#
# This library 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 library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
#
# Author: Loïc Molinari <loic@fluendo.com>
import sys, pgm, gobject, gst
from pgm.timing import controller, modifier, keyframe, ticker
def on_update_pass(viewport, tck):
tck.tick()
# Terminate the mainloop on a delete event
def on_delete(viewport, event, pipeline):
pipeline.set_state(gst.STATE_NULL)
pgm.main_quit()
# Terminate the mainloop on 'Escape' or 'q' key press event
def on_key_press(viewport, event, pipeline):
if event.keyval == pgm.keysyms.q or event.keyval == pgm.keysyms.Escape:
pgm.main_quit()
def main(args):
# Argument check
if len(args) < 1:
print 'usage: %s uri' % sys.argv[0]
return -1
# OpenGL viewport creation
gl = pgm.viewport_factory_make('opengl')
gl.title = 'Video cloning'
# Canvas and image drawables creation
cvs = pgm.Canvas()
img1 = pgm.Image()
img2 = pgm.Image()
img3 = pgm.Image()
# Bind the canvas to the OpenGL viewport
gl.set_canvas(cvs)
# Images properties
img1.position = (0.1, 0.0, 0.0)
img1.size = (1.8, 2.0)
img1.fg_color = (255, 100, 100, 255)
img1.bg_a = 0
img2.position = (1.1, 0.5, 0.0)
img2.size = (1.8, 2.0)
img2.fg_color = (100, 255, 100, 155)
img2.bg_a = 0
img3.position = (2.0, 1.0, 0.0)
img3.size = (1.8, 2.0)
img3.fg_color = (100, 100, 255, 255)
img3.bg_a = 0
# Drawables need to be shown
img1.show()
img2.show()
img3.show()
# Add them to the middle layer of the canvas
cvs.add(pgm.DRAWABLE_MIDDLE, img1, img3, img2)
# GStreamer pipeline setup
sink = gst.element_factory_make('pgmimagesink')
pipeline = gst.element_factory_make('playbin')
pipeline.set_property('uri', sys.argv[1])
pipeline.set_property('video-sink', sink)
sink.set_property('image', img1)
pipeline.set_state(gst.STATE_PLAYING)
# Cloning from the first image
img2.set_from_image(img1)
img3.set_from_image(img1)
# Create a animation position timeline
tml = [keyframe.KeyFrame(1.0, 0.0),
keyframe.KeyFrame(0.0, 1.0)]
# Create the animation modifiers
mdf1 = modifier.Modifier([img1], 'y', tml)
mdf2 = modifier.Modifier([img2], 'y', tml)
mdf3 = modifier.Modifier([img3], 'y', tml)
# Set the ticker used by controllers
tck = ticker.Ticker()
controller.Controller.set_ticker(tck)
# Create the animation controllers
ctrl1 = controller.Controller(duration=700, resolution=7,
repeat_behavior=controller.REVERSE,
repeat_count=controller.INFINITE,
transformation=controller.DECELERATE,
modifiers=[mdf1])
ctrl2 = controller.Controller(duration=800, resolution=7,
repeat_behavior=controller.REVERSE,
repeat_count=controller.INFINITE,
transformation=controller.DECELERATE,
modifiers=[mdf2])
ctrl3 = controller.Controller(duration=900, resolution=7,
repeat_behavior=controller.REVERSE,
repeat_count=controller.INFINITE,
transformation=controller.DECELERATE,
modifiers=[mdf3])
# Start the controllers
ctrl1.start()
ctrl2.start()
ctrl3.start()
# Let's start the mainloop
gl.connect('delete-event', on_delete, pipeline)
gl.connect('key-press-event', on_key_press, pipeline)
gl.connect('update-pass', on_update_pass, tck)
gl.show()
pgm.main()
if __name__ == '__main__':
sys.exit(main(sys.argv[1:]))
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