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
|
/* This file is part of the GNU plotutils package. Copyright (C) 1995,
1996, 1997, 1998, 1999, 2000, 2005, 2008, Free Software Foundation, Inc.
The GNU plotutils package is free software. You may 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, or (at your
option) any later version.
The GNU plotutils package 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 the GNU plotutils package; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin St., Fifth Floor,
Boston, MA 02110-1301, USA. */
#include "sys-defines.h"
#include "extern.h"
bool
_pl_i_erase_page (S___(Plotter *_plotter))
{
/* If we're animating, emit the GIF header, and emit the just-finished
frame as one of the images in the animated GIF. But don't do this
for the zeroth frame unless it's nonempty. */
if (_plotter->i_animation && _plotter->data->page_number == 1 && _plotter->data->outfp
&& (_plotter->data->frame_number > 0 || _plotter->i_frame_nonempty))
{
if (_plotter->i_header_written == false)
{
_pl_i_write_gif_header (S___(_plotter));
_plotter->i_header_written = true;
}
/* emit image using RLE module (see i_rle.c) */
_pl_i_write_gif_image (S___(_plotter));
}
/* delete image: deallocate frame's libxmi canvas, reset frame's color
table */
_pl_i_delete_image (S___(_plotter));
/* Create new image, consisting of libxmi canvas and colormap;
initialized to background color. First entries in the color table
will be (1) transparent color [if there is one, and we're animating]
and (2) background color. */
_pl_i_new_image (S___(_plotter));
/* next frame will start empty */
_plotter->i_frame_nonempty = false;
return true;
}
|
