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/*
** Copyright (C) 2009 Tadej Borovšak <tadeboro@gmail.com>
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <cairo.h>
#include <glib.h>
/* Local functions declarations go here */
static void
transition_render( cairo_t *cr,
cairo_surface_t *image_from,
cairo_surface_t *image_to,
gdouble progress,
gint type,
gboolean direction );
/* Plug-in API */
void
img_get_plugin_info( gchar **group,
gchar ***trans )
{
gint i = 0;
*group = "Misc Shape Wipe";
*trans = g_new( gchar *, 13 );
(*trans)[i++] = "Heart In";
(*trans)[i++] = "img_heart_in";
(*trans)[i++] = GINT_TO_POINTER( 56 );
(*trans)[i++] = "Heart Out";
(*trans)[i++] = "img_heart_out";
(*trans)[i++] = GINT_TO_POINTER( 57 );
(*trans)[i++] = "Keyhole In";
(*trans)[i++] = "img_key_in";
(*trans)[i++] = GINT_TO_POINTER( 58 );
(*trans)[i++] = "Keyhole Out";
(*trans)[i++] = "img_key_out";
(*trans)[i++] = GINT_TO_POINTER( 59 );
(*trans)[i++] = NULL;
}
void
img_heart_in( cairo_t *cr,
cairo_surface_t *image_from,
cairo_surface_t *image_to,
gdouble progress )
{
transition_render( cr, image_from, image_to, progress, 1, TRUE );
}
void
img_heart_out( cairo_t *cr,
cairo_surface_t *image_from,
cairo_surface_t *image_to,
gdouble progress )
{
transition_render( cr, image_from, image_to, progress, 1, FALSE );
}
void
img_key_in( cairo_t *cr,
cairo_surface_t *image_from,
cairo_surface_t *image_to,
gdouble progress )
{
transition_render( cr, image_from, image_to, progress, 2, TRUE );
}
void
img_key_out( cairo_t *cr,
cairo_surface_t *image_from,
cairo_surface_t *image_to,
gdouble progress )
{
transition_render( cr, image_from, image_to, progress, 2, FALSE );
}
/* Local functions definitions */
static void
transition_render( cairo_t *cr,
cairo_surface_t *image_from,
cairo_surface_t *image_to,
gdouble progress,
gint type,
gboolean direction )
{
gint width, height, w2, h2, offset;
cairo_surface_t *layer1, *layer2;
width = cairo_image_surface_get_width( image_from );
height = cairo_image_surface_get_height( image_from );
/* Drawing code goes here */
if( direction )
{
layer2 = image_from;
layer1 = image_to;
progress = 1 - progress;
}
else
{
layer2 = image_to;
layer1 = image_from;
}
w2 = width / 2;
h2 = height / 2;
cairo_set_source_surface( cr, layer1, 0, 0 );
cairo_paint( cr );
if( type == 1 )
offset = 100;
else
offset = 40;
cairo_set_source_surface( cr, layer2, 0, 0 );
cairo_translate( cr, w2, h2 - ( 1 - progress ) * offset );
cairo_scale( cr, progress, progress );
switch( type )
{
case 1: /* Heart */
cairo_move_to( cr, 0, - h2 );
/* Left hand side */
cairo_curve_to( cr, - 275, - 355 - h2,
- 930, - 5 - h2,
- 450, 495 - h2 );
cairo_curve_to( cr, - 155, 840 - h2,
-65, 940 - h2,
0, 1020 - h2 );
/* Right hand side */
cairo_curve_to( cr, 65, 940 - h2,
155, 840 - h2,
450, 495 - h2 );
cairo_curve_to( cr, 930, -5 - h2,
275, - 355 - h2,
0, - h2 );
break;
case 2: /* Keyhole */
cairo_move_to( cr, 0, - 725 );
cairo_curve_to( cr, - 275, -725,
- 500, -500,
- 500, -230 );
cairo_curve_to( cr, - 500, -100,
- 450, 25,
- 360, 110 );
cairo_line_to( cr, - 480, 725 );
cairo_line_to( cr, 480, 725 );
cairo_line_to( cr, 360, 110 );
cairo_curve_to( cr, 450, 25,
500, - 100,
500, - 230 );
cairo_curve_to( cr, 500, - 500,
275, - 725,
0, - 725 );
break;
}
cairo_fill( cr );
}
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