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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SEEN_SP_GRADIENT_H
#define SEEN_SP_GRADIENT_H
/*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
* Jon A. Cruz <jon@joncruz.org>
*
* Copyrigt (C) 2010 Jon A. Cruz
* Copyright (C) 2007 Johan Engelen
* Copyright (C) 1999-2002 Lauris Kaplinski
* Copyright (C) 2000-2001 Ximian, Inc.
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <2geom/affine.h>
#include <cstddef>
#include <glibmm/ustring.h>
#include <sigc++/connection.h>
#include <vector>
#include "sp-paint-server.h"
#include "sp-gradient-spread.h"
#include "sp-gradient-units.h"
#include "sp-gradient-vector.h"
#include "sp-mesh-array.h"
class SPGradientReference;
class SPStop;
#define SP_GRADIENT(obj) (dynamic_cast<SPGradient*>((SPObject*)obj))
#define SP_IS_GRADIENT(obj) (dynamic_cast<const SPGradient*>((SPObject*)obj) != NULL)
enum SPGradientType {
SP_GRADIENT_TYPE_UNKNOWN,
SP_GRADIENT_TYPE_LINEAR,
SP_GRADIENT_TYPE_RADIAL,
SP_GRADIENT_TYPE_MESH
};
enum SPGradientState {
SP_GRADIENT_STATE_UNKNOWN,
SP_GRADIENT_STATE_VECTOR,
SP_GRADIENT_STATE_PRIVATE
};
enum GrPointType {
POINT_LG_BEGIN = 0, //start enum at 0 (for indexing into gr_knot_shapes array for example)
POINT_LG_END,
POINT_LG_MID,
POINT_RG_CENTER,
POINT_RG_R1,
POINT_RG_R2,
POINT_RG_FOCUS,
POINT_RG_MID1,
POINT_RG_MID2,
POINT_MG_CORNER,
POINT_MG_HANDLE,
POINT_MG_TENSOR,
// insert new point types here.
POINT_G_INVALID
};
namespace Inkscape {
enum PaintTarget {
FOR_FILL,
FOR_STROKE
};
/**
* Convenience function to access a common vector of all enum values.
*/
std::vector<PaintTarget> const &allPaintTargets();
} // namespace Inkscape
/**
* Gradient
*
* Implement spread, stops list
* \todo fixme: Implement more here (Lauris)
*/
class SPGradient : public SPPaintServer {
public:
SPGradient();
~SPGradient() override;
private:
/** gradientUnits attribute */
SPGradientUnits units;
unsigned int units_set : 1;
public:
/** gradientTransform attribute */
Geom::Affine gradientTransform;
unsigned int gradientTransform_set : 1;
private:
/** spreadMethod attribute */
SPGradientSpread spread;
unsigned int spread_set : 1;
/** Gradient stops */
unsigned int has_stops : 1;
/** Gradient patches */
unsigned int has_patches : 1;
public:
/** Reference (href) */
SPGradientReference *ref;
/** State in Inkscape gradient system */
unsigned int state;
/** Linear and Radial Gradients */
/** Composed vector */
SPGradientVector vector;
sigc::connection modified_connection;
bool hasStops() const;
SPStop* getFirstStop();
int getStopCount() const;
bool isEquivalent(SPGradient *b);
bool isAligned(SPGradient *b);
/** Mesh Gradients **************/
/** Composed array (for mesh gradients) */
SPMeshNodeArray array;
SPMeshNodeArray array_smoothed; // Smoothed version of array
bool hasPatches() const;
/** All Gradients **************/
bool isUnitsSet() const;
SPGradientUnits getUnits() const;
void setUnits(SPGradientUnits units);
bool isSpreadSet() const;
SPGradientSpread getSpread() const;
/**
* Returns private vector of given gradient (the gradient at the end of the href chain which has
* stops), optionally normalizing it.
*
* \pre SP_IS_GRADIENT(gradient).
* \pre There exists a gradient in the chain that has stops.
*/
SPGradient *getVector(bool force_private = false);
/**
* Returns private mesh of given gradient (the gradient at the end of the href chain which has
* patches), optionally normalizing it.
*/
SPGradient *getArray(bool force_private = false);
//static GType getType();
/** Forces vector to be built, if not present (i.e. changed) */
void ensureVector();
/** Forces array (mesh) to be built, if not present (i.e. changed) */
void ensureArray();
/**
* Set spread property of gradient and emit modified.
*/
void setSpread(SPGradientSpread spread);
SPGradientSpread fetchSpread();
SPGradientUnits fetchUnits();
void setSwatch(bool swatch = true);
static void gradientRefModified(SPObject *href, unsigned int flags, SPGradient *gradient);
static void gradientRefChanged(SPObject *old_ref, SPObject *ref, SPGradient *gr);
/* Gradient repr methods */
void repr_write_vector();
void repr_clear_vector();
cairo_pattern_t *create_preview_pattern(double width);
/** Transforms to/from gradient position space in given environment */
Geom::Affine get_g2d_matrix(Geom::Affine const &ctm,
Geom::Rect const &bbox) const;
Geom::Affine get_gs2d_matrix(Geom::Affine const &ctm,
Geom::Rect const &bbox) const;
void set_gs2d_matrix(Geom::Affine const &ctm, Geom::Rect const &bbox,
Geom::Affine const &gs2d);
private:
bool invalidateVector();
bool invalidateArray();
void rebuildVector();
void rebuildArray();
protected:
void build(SPDocument *document, Inkscape::XML::Node *repr) override;
void release() override;
void modified(unsigned int flags) override;
Inkscape::XML::Node* write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, unsigned int flags) override;
void child_added(Inkscape::XML::Node *child, Inkscape::XML::Node *ref) override;
void remove_child(Inkscape::XML::Node *child) override;
void set(SPAttributeEnum key, char const *value) override;
};
void
sp_gradient_pattern_common_setup(cairo_pattern_t *cp,
SPGradient *gr,
Geom::OptRect const &bbox,
double opacity);
#endif // SEEN_SP_GRADIENT_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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