b6856af9d8
I still see some limitations in GimpGradient, and in particular, they are still always stored as RGB in GGR files. It would be nice if we could store the actual color format. This way, if someone chooses a gradient stop as Lab or CMYK color, that's what the gradient file would keep track of. But also even storing the space of a color (instead of storing/loading always in sRGB, even though this may still work fine as we store unbounded double values). This might warrant for a v2 of GGR file format. This commit also fixes loading of SVG gradient which was apparently broken regarding hexadecimal color parsing. Finally I improve gegl_color_set_alpha() by adding an alpha channel when the initial format had none.
292 lines
16 KiB
C
292 lines
16 KiB
C
/* GIMP - The GNU 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 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 __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_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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GimpGradientColor left_color_type;
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GeglColor *left_color;
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GimpGradientColor right_color_type;
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GeglColor *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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};
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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 (GimpContext *context,
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const gchar *name);
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GimpData * gimp_gradient_get_standard (GimpContext *context);
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GimpGradientSegment * gimp_gradient_get_color_at (GimpGradient *gradient,
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GimpContext *context,
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GimpGradientSegment *seg,
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gdouble pos,
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gboolean reverse,
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GimpGradientBlendColorSpace blend_color_space,
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GeglColor **color);
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GimpGradientSegment * gimp_gradient_get_segment_at (GimpGradient *grad,
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gdouble pos);
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void gimp_gradient_split_at (GimpGradient *gradient,
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GimpContext *context,
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GimpGradientSegment *seg,
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gdouble pos,
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GimpGradientBlendColorSpace blend_color_space,
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GimpGradientSegment **newl,
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GimpGradientSegment **newr);
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gboolean gimp_gradient_has_fg_bg_segments (GimpGradient *gradient);
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GimpGradient * gimp_gradient_flatten (GimpGradient *gradient,
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GimpContext *context);
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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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GimpContext *context,
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GimpGradientSegment *lseg,
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GimpGradientBlendColorSpace blend_color_space,
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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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GimpContext *context,
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GimpGradientSegment *lseg,
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gint parts,
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GimpGradientBlendColorSpace blend_color_space,
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GimpGradientSegment **newl,
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GimpGradientSegment **newr);
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/* Colors Setting/Getting Routines */
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GeglColor * gimp_gradient_segment_get_left_color (GimpGradient *gradient,
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GimpGradientSegment *seg);
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void gimp_gradient_segment_set_left_color (GimpGradient *gradient,
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GimpGradientSegment *seg,
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GeglColor *color);
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GeglColor * gimp_gradient_segment_get_right_color (GimpGradient *gradient,
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GimpGradientSegment *seg);
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void gimp_gradient_segment_set_right_color (GimpGradient *gradient,
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GimpGradientSegment *seg,
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GeglColor *color);
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GimpGradientColor
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gimp_gradient_segment_get_left_color_type (GimpGradient *gradient,
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GimpGradientSegment *seg);
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void
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gimp_gradient_segment_set_left_color_type (GimpGradient *gradient,
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GimpGradientSegment *seg,
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GimpGradientColor color_type);
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GimpGradientColor
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gimp_gradient_segment_get_right_color_type (GimpGradient *gradient,
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GimpGradientSegment *seg);
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void
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gimp_gradient_segment_set_right_color_type (GimpGradient *gradient,
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GimpGradientSegment *seg,
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GimpGradientColor color_type);
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GeglColor *
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gimp_gradient_segment_get_left_flat_color (GimpGradient *gradient,
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GimpContext *context,
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GimpGradientSegment *seg);
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GeglColor *
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gimp_gradient_segment_get_right_flat_color (GimpGradient *gradient,
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GimpContext *context,
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GimpGradientSegment *seg);
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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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gint gimp_gradient_segment_range_get_n_segments
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(GimpGradient *gradient,
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GimpGradientSegment *range_l,
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GimpGradientSegment *range_r);
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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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GeglColor *color1,
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GeglColor *color2,
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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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GimpContext *context,
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GimpGradientSegment *start_seg,
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GimpGradientSegment *end_seg,
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GimpGradientBlendColorSpace blend_color_space,
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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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GimpContext *context,
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GimpGradientSegment *start_seg,
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GimpGradientSegment *end_seg,
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gint parts,
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GimpGradientBlendColorSpace blend_color_space,
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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_merge (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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