density-map.h

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/*
 * density-map.h
 *
 * Copyright (C) 2010  Thomas A. Vaughan
 * All rights reserved.
 *
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the <organization> nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THOMAS A. VAUGHAN ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THOMAS A. VAUGHAN BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Simple density map.  Intended for glow and other effects but may have other
 * uses.
 */

#ifndef WAVE_GLUT_EFFECTS_DENSITY_MAP_H__
#define WAVE_GLUT_EFFECTS_DENSITY_MAP_H__


// includes --------------------------------------------------------------------
#include "wave-image/wave-image.h"
#include "wave-glut/wave-glut.h"


namespace glut {


/// \ingroup glut_effects
/*@{*/

////////////////////////////////////////////////////////////////////////////////
//
//      Density Map API -- methods to create images from density maps
//
////////////////////////////////////////////////////////////////////////////////

/// creates a density map where alpha varies by sphere cross-section
void createSphericalDensityMap(IN int size,     ///< width and height
                                IN const img_color_t& color,
                                OUT media::image_t& image);

/// creates a density map where alpha is constant (specified by color)
void createCircularDensityMap(IN int size,      ///< width and height
                                IN const img_color_t& color,
                                OUT media::image_t& image);

/// horizontal line segment running through the middle third of the image
void createLineSegmentDensityMap(IN int width,
                                IN const img_color_t& color,
                                OUT media::image_t& image);


};      // glut namespace


#endif  //WAVE_GLUT_EFFECTS_DENSITY_MAP_H__