Adding upstream version 1.2.2.upstream/1.2.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 245 insertions, 0 deletions

diff --git a/src/object/sp-gradient.h b/src/object/sp-gradient.h
new file mode 100644
index 0000000..cfc731e
--- /dev/null
+++ b/src/object/sp-gradient.h
@@ -0,0 +1,245 @@
+// 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;
+
+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);
+    SPGradient const *getVector(bool force_private = false) const
+    {
+        return const_cast<SPGradient *>(this)->getVector(force_private);
+    }
+
+ /**
+ * 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);
+
+    bool isSolid() const;
+
+    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(SPAttr key, char const *value) override;
+};
+
+void
+sp_gradient_pattern_common_setup(cairo_pattern_t *cp,
+                                 SPGradient *gr,
+                                 Geom::OptRect const &bbox,
+                                 double opacity);
+
+
+MAKE_SP_OBJECT_DOWNCAST_FUNCTIONS(SP_GRADIENT, SPGradient)
+MAKE_SP_OBJECT_TYPECHECK_FUNCTIONS(SP_IS_GRADIENT, SPGradient)
+
+#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 :