1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
# -*- mode: python; coding: utf-8 -*-
#
# Pigment Python binding mapping matrix 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
# Transform the mapping matrix of the image
def update_pass_cb(viewport, image, transformation):
image.mapping_matrix *= transformation
return True
# Start animating the mapping matrix when the pixbuf is loaded
def on_pixbuf_loaded(image, viewport, transformation):
viewport.connect('update-pass', update_pass_cb, image, transformation)
# Terminate the mainloop on a delete event
def on_delete(viewport, event):
pgm.main_quit()
# Entry point
def main(args):
# OpenGL viewport creation
gl = pgm.viewport_factory_make('opengl')
gl.connect('delete-event', on_delete)
gl.size = (600, 600)
gl.title = 'Mapping matrix'
# Canvas creation
cvs = pgm.Canvas()
cvs.size = (600, 600)
gl.set_canvas(cvs)
# Transformation matrix creation
t = pgm.mat4x4_new_identity()
t.translate(0.5, 0.5, 0.0)
t.rotate_z(math.pi / 120.0)
t.translate(-0.5, -0.5, 0.0)
# Image creation
img = pgm.Image()
img.set_from_file('examples/pictures/meiko.jpg')
img.connect('pixbuf-loaded', on_pixbuf_loaded, gl, t)
img.size = (400, 400)
img.position = (100, 100, 0)
img.bg_color = (255, 255, 255, 0)
cvs.add(pgm.DRAWABLE_MIDDLE, img)
# Show the objects and start the main loop
img.show()
gl.show()
pgm.main()
if __name__ == '__main__':
sys.exit(main(sys.argv[1:]))
|
