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// Copyright 2004 David Hilvert <dhilvert@auricle.dyndns.org>,
// <dhilvert@ugcs.caltech.edu>
/* This file is part of the Anti-Lamenessing Engine.
The Anti-Lamenessing Engine 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 3 of the License, or
(at your option) any later version.
The Anti-Lamenessing Engine 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 Anti-Lamenessing Engine; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* zero.h: A renderer for the zero filter.
*/
#ifndef __render_zero_h__
#define __render_zero_h__
#include "incremental.h"
#include "../image_zero.h"
class zero : public incremental {
public:
zero(invariant *inv) : incremental(inv) {
assert (typeid(*inv->ssfe()->get_scaled_filter()->get_filter()) == typeid(filter::zero));
}
/*
* Perform the current rendering step.
*/
virtual void step() {
assert (get_step() >= -1);
if (get_step() == 0) {
transformation t = align::of(0);
const image *im = image_rw::open(0);
/*
* XXX: This approach to trimming pixels is probably a
* bit too aggressive. If it is changed, be sure to
* also change the corresponding lines in
* incremental.h.
*/
unsigned int trim_size = (int) ceil(get_scale_factor()) - 1;
accum_image = new image_zero((int) floor(im->height() * get_scale_factor()) - trim_size,
(int) floor(im->width() * get_scale_factor()) - trim_size, 3);
set_extents_by_map(0, t);
image_rw::close(0);
} else if (align::match(get_step())) {
transformation t = align::of(get_step());
if (is_extend())
increase_extents_by_map(get_step(), t);
}
}
void free_memory() {
}
};
#endif
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