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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __GIMP_GRADIENT_H__
#define __GIMP_GRADIENT_H__
#include "gimpdata.h"
#define GIMP_GRADIENT_FILE_EXTENSION ".ggr"
#define GIMP_GRADIENT_SVG_FILE_EXTENSION ".svg"
#define GIMP_GRADIENT_DEFAULT_SAMPLE_SIZE 40
struct _GimpGradientSegment
{
gdouble left, middle, right;
GimpRGB left_color;
GimpRGB right_color;
GimpGradientSegmentType type; /* Segment's blending function */
GimpGradientSegmentColor color; /* Segment's coloring type */
GimpGradientSegment *prev;
GimpGradientSegment *next;
};
#define GIMP_TYPE_GRADIENT (gimp_gradient_get_type ())
#define GIMP_GRADIENT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_GRADIENT, GimpGradient))
#define GIMP_GRADIENT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_GRADIENT, GimpGradientClass))
#define GIMP_IS_GRADIENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_GRADIENT))
#define GIMP_IS_GRADIENT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_GRADIENT))
#define GIMP_GRADIENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_GRADIENT, GimpGradientClass))
typedef struct _GimpGradientClass GimpGradientClass;
struct _GimpGradient
{
GimpData parent_instance;
GimpGradientSegment *segments;
/*< private >*/
GimpGradientSegment *last_visited;
};
struct _GimpGradientClass
{
GimpDataClass parent_class;
};
GType gimp_gradient_get_type (void) G_GNUC_CONST;
GimpData * gimp_gradient_new (const gchar *name,
gboolean stingy_memory_use);
GimpData * gimp_gradient_get_standard (void);
void gimp_gradient_get_color_at (GimpGradient *gradient,
gdouble pos,
gboolean reverse,
GimpRGB *color);
GimpGradientSegment * gimp_gradient_get_segment_at (GimpGradient *grad,
gdouble pos);
/* gradient segment functions */
GimpGradientSegment * gimp_gradient_segment_new (void);
GimpGradientSegment * gimp_gradient_segment_get_last (GimpGradientSegment *seg);
GimpGradientSegment * gimp_gradient_segment_get_first (GimpGradientSegment *seg);
GimpGradientSegment * gimp_gradient_segment_get_nth (GimpGradientSegment *seg,
gint index);
void gimp_gradient_segment_free (GimpGradientSegment *seg);
void gimp_gradient_segments_free (GimpGradientSegment *seg);
void gimp_gradient_segment_split_midpoint (GimpGradient *gradient,
GimpGradientSegment *lseg,
GimpGradientSegment **newl,
GimpGradientSegment **newr);
void gimp_gradient_segment_split_uniform (GimpGradient *gradient,
GimpGradientSegment *lseg,
gint parts,
GimpGradientSegment **newl,
GimpGradientSegment **newr);
/* Colors Setting/Getting Routines */
void gimp_gradient_segment_get_left_color (GimpGradient *gradient,
GimpGradientSegment *seg,
GimpRGB *color);
void gimp_gradient_segment_set_left_color (GimpGradient *gradient,
GimpGradientSegment *seg,
const GimpRGB *color);
void gimp_gradient_segment_get_right_color (GimpGradient *gradient,
GimpGradientSegment *seg,
GimpRGB *color);
void gimp_gradient_segment_set_right_color (GimpGradient *gradient,
GimpGradientSegment *seg,
const GimpRGB *color);
/* Position Setting/Getting Routines */
/* (Setters return the position after it was set) */
gdouble gimp_gradient_segment_get_left_pos (GimpGradient *gradient,
GimpGradientSegment *seg);
gdouble gimp_gradient_segment_set_left_pos (GimpGradient *gradient,
GimpGradientSegment *seg,
gdouble pos);
gdouble gimp_gradient_segment_get_right_pos (GimpGradient *gradient,
GimpGradientSegment *seg);
gdouble gimp_gradient_segment_set_right_pos (GimpGradient *gradient,
GimpGradientSegment *seg,
gdouble pos);
gdouble gimp_gradient_segment_get_middle_pos (GimpGradient *gradient,
GimpGradientSegment *seg);
gdouble gimp_gradient_segment_set_middle_pos (GimpGradient *gradient,
GimpGradientSegment *seg,
gdouble pos);
/* Getting/Setting the Blending Function/Coloring Type */
GimpGradientSegmentType
gimp_gradient_segment_get_blending_function (GimpGradient *gradient,
GimpGradientSegment *seg);
GimpGradientSegmentColor
gimp_gradient_segment_get_coloring_type (GimpGradient *gradient,
GimpGradientSegment *seg);
/*
* If the second segment is NULL, these functions will process
* until the end of the string.
* */
void gimp_gradient_segment_range_compress (GimpGradient *gradient,
GimpGradientSegment *range_l,
GimpGradientSegment *range_r,
gdouble new_l,
gdouble new_r);
void gimp_gradient_segment_range_blend (GimpGradient *gradient,
GimpGradientSegment *lseg,
GimpGradientSegment *rseg,
const GimpRGB *rgb1,
const GimpRGB *rgb2,
gboolean blend_colors,
gboolean blend_opacity);
void gimp_gradient_segment_range_set_blending_function
(GimpGradient *gradient,
GimpGradientSegment *start_seg,
GimpGradientSegment *end_seg,
GimpGradientSegmentType new_type);
void gimp_gradient_segment_range_set_coloring_type
(GimpGradient *gradient,
GimpGradientSegment *start_seg,
GimpGradientSegment *end_seg,
GimpGradientSegmentColor new_color);
void gimp_gradient_segment_range_flip (GimpGradient *gradient,
GimpGradientSegment *start_seg,
GimpGradientSegment *end_seg,
GimpGradientSegment **final_start_seg,
GimpGradientSegment **final_end_seg);
void gimp_gradient_segment_range_replicate (GimpGradient *gradient,
GimpGradientSegment *start_seg,
GimpGradientSegment *end_seg,
gint replicate_times,
GimpGradientSegment **final_start_seg,
GimpGradientSegment **final_end_seg);
void gimp_gradient_segment_range_split_midpoint
(GimpGradient *gradient,
GimpGradientSegment *start_seg,
GimpGradientSegment *end_seg,
GimpGradientSegment **final_start_seg,
GimpGradientSegment **final_end_seg);
void gimp_gradient_segment_range_split_uniform
(GimpGradient *gradient,
GimpGradientSegment *start_seg,
GimpGradientSegment *end_seg,
gint parts,
GimpGradientSegment **final_start_seg,
GimpGradientSegment **final_end_seg);
void gimp_gradient_segment_range_delete (GimpGradient *gradient,
GimpGradientSegment *start_seg,
GimpGradientSegment *end_seg,
GimpGradientSegment **final_start_seg,
GimpGradientSegment **final_end_seg);
void gimp_gradient_segment_range_recenter_handles
(GimpGradient *gradient,
GimpGradientSegment *start_seg,
GimpGradientSegment *end_seg);
void gimp_gradient_segment_range_redistribute_handles
(GimpGradient *gradient,
GimpGradientSegment *start_seg,
GimpGradientSegment *end_seg);
gdouble gimp_gradient_segment_range_move (GimpGradient *gradient,
GimpGradientSegment *range_l,
GimpGradientSegment *range_r,
gdouble delta,
gboolean control_compress);
#endif /* __GIMP_GRADIENT_H__ */
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