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Diffstat (limited to '')
-rw-r--r-- | src/gradient-chemistry.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/gradient-chemistry.h b/src/gradient-chemistry.h new file mode 100644 index 0000000..d057c66 --- /dev/null +++ b/src/gradient-chemistry.h @@ -0,0 +1,138 @@ +// 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 : |