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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SEEN_SP_GRADIENT_CHEMISTRY_H
#define SEEN_SP_GRADIENT_CHEMISTRY_H
/*
* Various utility methods for gradients
*
* Author:
* Lauris Kaplinski <lauris@kaplinski.com>
* bulia byak <buliabyak@users.sf.net>
* Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
* Jon A. Cruz <jon@joncruz.org>
*
* Copyright (C) 2010 Authors
* Copyright (C) 2007 Johan Engelen
* Copyright (C) 2001-2002 Lauris Kaplinski
* Copyright (C) 2001 Ximian, Inc.
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "object/sp-gradient.h"
class SPCSSAttr;
class SPItem;
class SPGradient;
class SPDesktop;
/**
* Either normalizes given gradient to vector, or returns fresh normalized
* vector - in latter case, original gradient is flattened and stops cleared.
* No transrefing - i.e. caller shouldn't hold reference to original and
* does not get one to new automatically (doc holds ref of every object anyways)
*/
SPGradient *sp_gradient_ensure_vector_normalized(SPGradient *gradient);
/**
* Sets item fill or stroke to the gradient of the specified type with given vector, creating
* new private gradient, if needed.
* gr has to be a normalized vector.
*/
SPGradient *sp_item_set_gradient(SPItem *item, SPGradient *gr, SPGradientType type, Inkscape::PaintTarget fill_or_stroke);
/*
* Get default normalized gradient vector of document, create if there is none
*/
SPGradient *sp_document_default_gradient_vector( SPDocument *document, SPColor const &color, bool singleStop );
/**
* Return the preferred vector for \a o, made from (in order of preference) its current vector,
* current fill or stroke color, or from desktop style if \a o is NULL or doesn't have style.
*/
SPGradient *sp_gradient_vector_for_object( SPDocument *doc, SPDesktop *desktop, SPObject *o, Inkscape::PaintTarget fill_or_stroke, bool singleStop = false );
void sp_object_ensure_fill_gradient_normalized (SPObject *object);
void sp_object_ensure_stroke_gradient_normalized (SPObject *object);
SPGradient *sp_gradient_convert_to_userspace (SPGradient *gr, SPItem *item, const char *property);
SPGradient *sp_gradient_reset_to_userspace (SPGradient *gr, SPItem *item);
SPGradient *sp_gradient_fork_vector_if_necessary (SPGradient *gr);
SPGradient *sp_gradient_get_forked_vector_if_necessary(SPGradient *gradient, bool force_vector);
SPStop* sp_last_stop(SPGradient *gradient);
SPStop* sp_get_stop_i(SPGradient *gradient, unsigned int i);
// return n-th stop counting from 0; make no assumptions about offsets
SPStop* sp_get_nth_stop(SPGradient* gradient, unsigned int index);
std::pair<SPStop*, SPStop*> sp_get_before_after_stops(SPStop* stop);
unsigned int sp_number_of_stops(SPGradient const *gradient);
unsigned int sp_number_of_stops_before_stop(SPGradient* gradient, SPStop *target);
guint32 average_color(guint32 c1, guint32 c2, double p = 0.5);
SPStop *sp_vector_add_stop(SPGradient *vector, SPStop* prev_stop, SPStop* next_stop, gfloat offset);
void sp_gradient_delete_stop(SPGradient* gradient, SPStop* stop);
SPStop* sp_gradient_add_stop(SPGradient* gradient, SPStop* current);
SPStop* sp_gradient_add_stop_at(SPGradient* gradient, double offset);
void sp_set_gradient_stop_color(SPDocument* document, SPStop* stop, SPColor color, double opacity);
void sp_gradient_transform_multiply(SPGradient *gradient, Geom::Affine postmul, bool set);
void sp_gradient_reverse_selected_gradients(SPDesktop *desktop);
void sp_gradient_invert_selected_gradients(SPDesktop *desktop, Inkscape::PaintTarget fill_or_stroke);
void sp_gradient_unset_swatch(SPDesktop *desktop, std::string const &id);
SPGradient* sp_item_get_gradient(SPItem *item, bool fillorstroke);
std::vector<SPItem*> sp_get_all_document_items(SPDocument* document);
int sp_get_gradient_refcount(SPDocument* document, SPGradient* gradient);
void sp_gradient_reverse_vector(SPGradient* gradient);
/**
* Fetches either the fill or the stroke gradient from the given item.
*
* @param fill_or_stroke the gradient type (fill/stroke) to get.
* @return the specified gradient if set, null otherwise.
*/
SPGradient *getGradient(SPItem *item, Inkscape::PaintTarget fill_or_stroke);
void sp_item_gradient_set_coords(SPItem *item, GrPointType point_type, unsigned int point_i, Geom::Point p_desk, Inkscape::PaintTarget fill_or_stroke, bool write_repr, bool scale);
/**
* Returns the position of point point_type of the gradient applied to item (either fill_or_stroke),
* in desktop coordinates.
*/
Geom::Point getGradientCoords(SPItem *item, GrPointType point_type, unsigned int point_i, Inkscape::PaintTarget fill_or_stroke);
SPGradient *sp_item_gradient_get_vector(SPItem *item, Inkscape::PaintTarget fill_or_stroke);
SPGradientSpread sp_item_gradient_get_spread(SPItem *item, Inkscape::PaintTarget fill_or_stroke);
SPStop* sp_item_gradient_get_stop(SPItem *item, GrPointType point_type, guint point_i, Inkscape::PaintTarget fill_or_stroke);
void sp_item_gradient_stop_set_style(SPItem *item, GrPointType point_type, unsigned int point_i, Inkscape::PaintTarget fill_or_stroke, SPCSSAttr *stop);
guint32 sp_item_gradient_stop_query_style(SPItem *item, GrPointType point_type, unsigned int point_i, Inkscape::PaintTarget fill_or_stroke);
void sp_item_gradient_reverse_vector(SPItem *item, Inkscape::PaintTarget fill_or_stroke);
void sp_item_gradient_invert_vector_color(SPItem *item, Inkscape::PaintTarget fill_or_stroke);
#endif // SEEN_SP_GRADIENT_CHEMISTRY_H
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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