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