← Back to branch summary

~ubuntu-branches/ubuntu/maverick/imagination/maverick

« back to all changes in this revision

Viewing changes to transitions/wave_down.c

  • Committer: Bazaar Package Importer
  • Author(s): Alessio Treglia
  • Date: 2009-07-07 09:09:38 UTC
  • mfrom: (2.1.1 sid)
  • Revision ID: james.westby@ubuntu.com-20090707090938-jvaub13ijh53oawy
Tags: 1.5-1ubuntu1
https://launchpad.net/bugs/392874
* Merge with debian unstable (LP: #392874), Ubuntu remaining changes:
  - debian/control:
    + Move libav*-unstripped-* packages to Recommends as suggested by
      upstream.
    + Improve long description.
    + Add watch file.
  - debian/copyright: Replace deprecated symbol (C) with ©.

Show diffs side-by-side

added added

removed removed

Lines of Context:
transitions/wave_down.c
1
 
/*
2
 
 *  Copyright (c) 2009 Tadej Borovšak   <tadeboro@gmail.com>
3
 
 *
4
 
 *  This program is free software; you can redistribute it and/or modify
5
 
 *  it under the terms of the GNU General Public License as published by
6
 
 *  the Free Software Foundation; either version 2 of the License,or
7
 
 *  (at your option) any later version.
8
 
 *
9
 
 *  This program is distributed in the hope that it will be useful,
10
 
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
11
 
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12
 
 *  GNU Library General Public License for more details.
13
 
 *
14
 
 *  You should have received a copy of the GNU General Public License
15
 
 *  along with this program; if not,write to the Free Software
16
 
 *  Foundation,Inc.,59 Temple Place - Suite 330,Boston,MA 02111-1307,USA.
17
 
 *
18
 
 */
19
 
 
20
 
#include <gdk/gdk.h>
21
 
 
22
 
void img_transition_set_name(gchar **name)
23
 
{
24
 
        *name = "Wave Down";
25
 
}
26
 
 
27
 
void img_transition_render(GdkDrawable *window, GdkPixbuf *image_from, GdkPixbuf *image_to, gdouble progress, gint file_desc)
28
 
{
29
 
        cairo_t *cr;
30
 
        cairo_surface_t *surface;
31
 
        cairo_pattern_t *pattern;
32
 
        gint    width, height;
33
 
        gdouble wave_factor = 1.07;     // 50px
34
 
        gdouble stop;
35
 
 
36
 
        gdk_drawable_get_size(window, &width, &height);
37
 
 
38
 
        if(file_desc < 0)
39
 
        {
40
 
                cr = gdk_cairo_create(window);
41
 
        }
42
 
        else
43
 
        {
44
 
                surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, width, height);
45
 
                cr = cairo_create(surface);
46
 
        }
47
 
 
48
 
        gdk_cairo_set_source_pixbuf(cr,image_from,0,0);
49
 
        cairo_paint(cr);
50
 
 
51
 
        gdk_cairo_set_source_pixbuf(cr,image_to,0,0);
52
 
        pattern = cairo_pattern_create_linear( width / 2, 0, width / 2, height );
53
 
        /* Add color stops */
54
 
        cairo_pattern_add_color_stop_rgba(pattern, (1 - wave_factor) / 2, 0, 0, 0, 1 ); // start
55
 
 
56
 
        stop = progress * wave_factor - ( wave_factor - 1 );
57
 
        cairo_pattern_add_color_stop_rgba(pattern, stop, 0, 0, 0, 1 );
58
 
 
59
 
        stop = progress * wave_factor;
60
 
        cairo_pattern_add_color_stop_rgba(pattern, stop, 0, 0, 0, 0 );
61
 
 
62
 
        cairo_pattern_add_color_stop_rgba(pattern, wave_factor, 0, 0, 0, 0 ); // stop
63
 
 
64
 
        cairo_mask(cr, pattern);
65
 
        cairo_destroy(cr);
66
 
        cairo_pattern_destroy(pattern);
67
 
        
68
 
        if(file_desc < 0)
69
 
                return;
70
 
 
71
 
        img_export_cairo_to_ppm(surface, file_desc);
72
 
        cairo_surface_destroy(surface);
73
 
}