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