301 lines
16 KiB
C
301 lines
16 KiB
C
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/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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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 3 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, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef __PIKA_GRADIENT_H__
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#define __PIKA_GRADIENT_H__
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#include "pikadata.h"
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#define PIKA_GRADIENT_DEFAULT_SAMPLE_SIZE 40
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struct _PikaGradientSegment
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{
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gdouble left, middle, right;
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PikaGradientColor left_color_type;
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PikaRGB left_color;
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PikaGradientColor right_color_type;
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PikaRGB right_color;
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PikaGradientSegmentType type; /* Segment's blending function */
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PikaGradientSegmentColor color; /* Segment's coloring type */
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PikaGradientSegment *prev;
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PikaGradientSegment *next;
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};
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#define PIKA_TYPE_GRADIENT (pika_gradient_get_type ())
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#define PIKA_GRADIENT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), PIKA_TYPE_GRADIENT, PikaGradient))
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#define PIKA_GRADIENT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PIKA_TYPE_GRADIENT, PikaGradientClass))
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#define PIKA_IS_GRADIENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), PIKA_TYPE_GRADIENT))
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#define PIKA_IS_GRADIENT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PIKA_TYPE_GRADIENT))
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#define PIKA_GRADIENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PIKA_TYPE_GRADIENT, PikaGradientClass))
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typedef struct _PikaGradientClass PikaGradientClass;
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struct _PikaGradient
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{
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PikaData parent_instance;
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PikaGradientSegment *segments;
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};
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struct _PikaGradientClass
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{
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PikaDataClass parent_class;
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};
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GType pika_gradient_get_type (void) G_GNUC_CONST;
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PikaData * pika_gradient_new (PikaContext *context,
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const gchar *name);
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PikaData * pika_gradient_get_standard (PikaContext *context);
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PikaGradientSegment * pika_gradient_get_color_at (PikaGradient *gradient,
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PikaContext *context,
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PikaGradientSegment *seg,
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gdouble pos,
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gboolean reverse,
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PikaGradientBlendColorSpace blend_color_space,
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PikaRGB *color);
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PikaGradientSegment * pika_gradient_get_segment_at (PikaGradient *grad,
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gdouble pos);
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void pika_gradient_split_at (PikaGradient *gradient,
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PikaContext *context,
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PikaGradientSegment *seg,
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gdouble pos,
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PikaGradientBlendColorSpace blend_color_space,
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PikaGradientSegment **newl,
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PikaGradientSegment **newr);
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gboolean pika_gradient_has_fg_bg_segments (PikaGradient *gradient);
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PikaGradient * pika_gradient_flatten (PikaGradient *gradient,
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PikaContext *context);
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/* gradient segment functions */
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PikaGradientSegment * pika_gradient_segment_new (void);
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PikaGradientSegment * pika_gradient_segment_get_last (PikaGradientSegment *seg);
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PikaGradientSegment * pika_gradient_segment_get_first (PikaGradientSegment *seg);
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PikaGradientSegment * pika_gradient_segment_get_nth (PikaGradientSegment *seg,
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gint index);
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void pika_gradient_segment_free (PikaGradientSegment *seg);
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void pika_gradient_segments_free (PikaGradientSegment *seg);
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void pika_gradient_segment_split_midpoint (PikaGradient *gradient,
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PikaContext *context,
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PikaGradientSegment *lseg,
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PikaGradientBlendColorSpace blend_color_space,
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PikaGradientSegment **newl,
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PikaGradientSegment **newr);
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void pika_gradient_segment_split_uniform (PikaGradient *gradient,
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PikaContext *context,
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PikaGradientSegment *lseg,
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gint parts,
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PikaGradientBlendColorSpace blend_color_space,
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PikaGradientSegment **newl,
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PikaGradientSegment **newr);
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/* Colors Setting/Getting Routines */
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void pika_gradient_segment_get_left_color (PikaGradient *gradient,
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PikaGradientSegment *seg,
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PikaRGB *color);
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void pika_gradient_segment_set_left_color (PikaGradient *gradient,
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PikaGradientSegment *seg,
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const PikaRGB *color);
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void pika_gradient_segment_get_right_color (PikaGradient *gradient,
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PikaGradientSegment *seg,
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PikaRGB *color);
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void pika_gradient_segment_set_right_color (PikaGradient *gradient,
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PikaGradientSegment *seg,
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const PikaRGB *color);
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PikaGradientColor
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pika_gradient_segment_get_left_color_type (PikaGradient *gradient,
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PikaGradientSegment *seg);
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void
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pika_gradient_segment_set_left_color_type (PikaGradient *gradient,
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PikaGradientSegment *seg,
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PikaGradientColor color_type);
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PikaGradientColor
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pika_gradient_segment_get_right_color_type (PikaGradient *gradient,
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PikaGradientSegment *seg);
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void
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pika_gradient_segment_set_right_color_type (PikaGradient *gradient,
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PikaGradientSegment *seg,
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PikaGradientColor color_type);
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void
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pika_gradient_segment_get_left_flat_color (PikaGradient *gradient,
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PikaContext *context,
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PikaGradientSegment *seg,
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PikaRGB *color);
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void
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pika_gradient_segment_get_right_flat_color (PikaGradient *gradient,
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PikaContext *context,
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PikaGradientSegment *seg,
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PikaRGB *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 pika_gradient_segment_get_left_pos (PikaGradient *gradient,
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PikaGradientSegment *seg);
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gdouble pika_gradient_segment_set_left_pos (PikaGradient *gradient,
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PikaGradientSegment *seg,
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gdouble pos);
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gdouble pika_gradient_segment_get_right_pos (PikaGradient *gradient,
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PikaGradientSegment *seg);
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gdouble pika_gradient_segment_set_right_pos (PikaGradient *gradient,
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PikaGradientSegment *seg,
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gdouble pos);
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gdouble pika_gradient_segment_get_middle_pos (PikaGradient *gradient,
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PikaGradientSegment *seg);
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gdouble pika_gradient_segment_set_middle_pos (PikaGradient *gradient,
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PikaGradientSegment *seg,
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gdouble pos);
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/* Getting/Setting the Blending Function/Coloring Type */
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PikaGradientSegmentType
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pika_gradient_segment_get_blending_function (PikaGradient *gradient,
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PikaGradientSegment *seg);
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PikaGradientSegmentColor
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pika_gradient_segment_get_coloring_type (PikaGradient *gradient,
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PikaGradientSegment *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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gint pika_gradient_segment_range_get_n_segments
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(PikaGradient *gradient,
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PikaGradientSegment *range_l,
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PikaGradientSegment *range_r);
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void pika_gradient_segment_range_compress (PikaGradient *gradient,
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PikaGradientSegment *range_l,
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PikaGradientSegment *range_r,
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gdouble new_l,
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gdouble new_r);
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void pika_gradient_segment_range_blend (PikaGradient *gradient,
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PikaGradientSegment *lseg,
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PikaGradientSegment *rseg,
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const PikaRGB *rgb1,
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const PikaRGB *rgb2,
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gboolean blend_colors,
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gboolean blend_opacity);
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void pika_gradient_segment_range_set_blending_function
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(PikaGradient *gradient,
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PikaGradientSegment *start_seg,
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PikaGradientSegment *end_seg,
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PikaGradientSegmentType new_type);
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void pika_gradient_segment_range_set_coloring_type
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(PikaGradient *gradient,
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PikaGradientSegment *start_seg,
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PikaGradientSegment *end_seg,
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PikaGradientSegmentColor new_color);
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void pika_gradient_segment_range_flip (PikaGradient *gradient,
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PikaGradientSegment *start_seg,
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PikaGradientSegment *end_seg,
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PikaGradientSegment **final_start_seg,
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PikaGradientSegment **final_end_seg);
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void pika_gradient_segment_range_replicate (PikaGradient *gradient,
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PikaGradientSegment *start_seg,
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PikaGradientSegment *end_seg,
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gint replicate_times,
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PikaGradientSegment **final_start_seg,
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PikaGradientSegment **final_end_seg);
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void pika_gradient_segment_range_split_midpoint
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(PikaGradient *gradient,
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PikaContext *context,
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PikaGradientSegment *start_seg,
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PikaGradientSegment *end_seg,
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PikaGradientBlendColorSpace blend_color_space,
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PikaGradientSegment **final_start_seg,
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PikaGradientSegment **final_end_seg);
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void pika_gradient_segment_range_split_uniform
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(PikaGradient *gradient,
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PikaContext *context,
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PikaGradientSegment *start_seg,
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PikaGradientSegment *end_seg,
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gint parts,
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PikaGradientBlendColorSpace blend_color_space,
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PikaGradientSegment **final_start_seg,
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PikaGradientSegment **final_end_seg);
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void pika_gradient_segment_range_delete (PikaGradient *gradient,
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PikaGradientSegment *start_seg,
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PikaGradientSegment *end_seg,
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PikaGradientSegment **final_start_seg,
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PikaGradientSegment **final_end_seg);
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void pika_gradient_segment_range_merge (PikaGradient *gradient,
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PikaGradientSegment *start_seg,
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PikaGradientSegment *end_seg,
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PikaGradientSegment **final_start_seg,
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PikaGradientSegment **final_end_seg);
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void pika_gradient_segment_range_recenter_handles
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(PikaGradient *gradient,
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PikaGradientSegment *start_seg,
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PikaGradientSegment *end_seg);
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void pika_gradient_segment_range_redistribute_handles
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(PikaGradient *gradient,
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PikaGradientSegment *start_seg,
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PikaGradientSegment *end_seg);
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gdouble pika_gradient_segment_range_move (PikaGradient *gradient,
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PikaGradientSegment *range_l,
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PikaGradientSegment *range_r,
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gdouble delta,
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gboolean control_compress);
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#endif /* __PIKA_GRADIENT_H__ */
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