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/*************************************************************************
* Copyright (C) 2009-2010 Tavian Barnes <tavianator@gmail.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library is free software; you can redistribute it and/ *
* or modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
/**
* @file
* Pre-defined pigments.
*/
#ifndef DIMENSION_PIGMENTS_H
#define DIMENSION_PIGMENTS_H
/**
* A solid color.
* @param[in] color The color of the pigment.
* @return A pigment with the color \p color everywhere.
*/
dmnsn_pigment *dmnsn_new_solid_pigment(dmnsn_color color);
/**
* An image map. The image (regardless of its real dimensions) is projected
* on the x-y plane in tesselating unit squares.
* @param[in] canvas The canvas holding the image.
* @return An image-mapped pigment.
*/
dmnsn_pigment *dmnsn_new_canvas_pigment(dmnsn_canvas *canvas);
/** Color map. */
typedef dmnsn_array dmnsn_color_map;
/**
* Create an empty color map.
* @return A color map with no entries.
*/
dmnsn_color_map *dmnsn_new_color_map(void);
/**
* Delete a color map.
* @param[in,out] map The color map to delete.
*/
void dmnsn_delete_color_map(dmnsn_color_map *map);
/**
* Add an entry (a scalar-color pair) to a color map.
* @param[in,out] map The color map to add to.
* @param[in] n The index of the entry.
* @param[in] c The value of the entry.
*/
void dmnsn_add_color_map_entry(dmnsn_color_map *map, double n, dmnsn_color c);
/**
* Evaluate a color map.
* @param[in] map The map to evaluate.
* @param[in] n The index to evaluate.
* @return The value of the gradient between the the two indicies closest to
* \p n.
*/
dmnsn_color dmnsn_color_map_value(const dmnsn_color_map *map, double n);
/**
* A color-mapped pigment.
* @param[in,out] pattern The pattern of the pigment.
* @param[in,out] map The color map to apply to the pattern.
* @return A pigment mapping the pattern to color values.
*/
dmnsn_pigment *dmnsn_new_color_map_pigment(dmnsn_pattern *pattern,
dmnsn_color_map *map);
#endif /* DIMENSION_PIGMENTS_H */
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