75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
// Copyright 2004 David Hilvert <dhilvert@auricle.dyndns.org>,
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// <dhilvert@ugcs.caltech.edu>
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/* This file is part of the Anti-Lamenessing Engine.
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The Anti-Lamenessing Engine is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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The Anti-Lamenessing Engine is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with the Anti-Lamenessing Engine; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* zero.h: A renderer for the zero filter.
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*/
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#ifndef __render_zero_h__
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#define __render_zero_h__
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#include "incremental.h"
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#include "../image_zero.h"
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class zero : public incremental {
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public:
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zero(invariant *inv) : incremental(inv) {
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assert (typeid(*inv->ssfe()->get_scaled_filter()->get_filter()) == typeid(filter::zero));
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}
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/*
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* Perform the current rendering step.
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*/
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virtual void step() {
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assert (get_step() >= -1);
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if (get_step() == 0) {
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transformation t = align::of(0);
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const image *im = image_rw::open(0);
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/*
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* XXX: This approach to trimming pixels is probably a
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* bit too aggressive. If it is changed, be sure to
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* also change the corresponding lines in
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* incremental.h.
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*/
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unsigned int trim_size = (int) ceil(get_scale_factor()) - 1;
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accum_image = new image_zero((int) floor(im->height() * get_scale_factor()) - trim_size,
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(int) floor(im->width() * get_scale_factor()) - trim_size, 3);
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set_extents_by_map(0, t);
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image_rw::close(0);
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} else if (align::match(get_step())) {
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transformation t = align::of(get_step());
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if (is_extend())
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increase_extents_by_map(get_step(), t);
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}
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}
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void free_memory() {
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}
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};
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#endif
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