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# -*- mode: python; coding: utf-8 -*-
#
# Pigment Python image wrapping 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, math, pgm, gobject
from pgm.timing import controller, modifier, keyframe, ticker
# Translate the mapping matrix of the image
def on_update_pass(viewport, tck):
tck.tick()
# Terminate the mainloop on a delete event
def on_delete(viewport, event):
pgm.main_quit()
# Entry point
def main(args):
# GObject threads initialization
gobject.threads_init()
# OpenGL viewport creation
gl = pgm.viewport_factory_make('opengl')
gl.size = (800, 164)
gl.title = 'Image wrapping'
# Canvas creation
cvs = pgm.Canvas()
cvs.size = (800, 164)
gl.set_canvas(cvs)
# Image creation
img = pgm.Image()
img.set_from_file('examples/pictures/line-pattern.png')
img.size = (700, 64)
img.position = (50, 50, 0)
img.bg_color = (255, 255, 255, 0)
img.wrapping = (pgm.IMAGE_REPEAT, pgm.IMAGE_REPEAT)
img.layout = pgm.IMAGE_FILLED
# Definition of the mapping matrix applying a scale on the x axis to correct
# the aspect-ratio of the image content distorted by the filled layout and
# the size of the image
img.mapping_sx = 800.0 / 64.0
# Set the ticker used by controllers
tck = ticker.Ticker()
controller.Controller.set_ticker(tck)
# position timeline
tml = [keyframe.KeyFrame(0.0, 0.0), keyframe.KeyFrame(1.0, 1.0)]
mdf = modifier.Modifier([img], 'mapping_tx', tml)
# Create the animation controller
ctrl = controller.Controller(duration=300,
repeat_behavior=controller.FORWARD,
repeat_count=controller.INFINITE,
transformation=controller.LINEAR,
modifiers=[mdf])
# Start the controller
ctrl.start()
# Setup viewport signals
gl.connect('delete-event', on_delete)
gl.connect('update-pass', on_update_pass, tck)
# Add the image to the canvas, show the objects and start the main loop
cvs.add(pgm.DRAWABLE_MIDDLE, img)
img.show()
gl.show()
pgm.main()
if __name__ == '__main__':
sys.exit(main(sys.argv[1:]))
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