1 // SPDX-License-Identifier: GPL-2.0-or-later 2 #ifndef SEEN_SP_FILTER_PRIMITIVE_H 3 #define SEEN_SP_FILTER_PRIMITIVE_H 4 5 /** \file 6 * Document level base class for all SVG filter primitives. 7 */ 8 /* 9 * Authors: 10 * Hugo Rodrigues <haa.rodrigues@gmail.com> 11 * Niko Kiirala <niko@kiirala.com> 12 * 13 * Copyright (C) 2006,2007 Authors 14 * 15 * Released under GNU GPL v2+, read the file 'COPYING' for more information. 16 */ 17 18 #include "2geom/rect.h" 19 #include "../sp-object.h" 20 #include "../sp-dimensions.h" 21 22 #define SP_FILTER_PRIMITIVE(obj) (dynamic_cast<SPFilterPrimitive*>((SPObject*)obj)) 23 #define SP_IS_FILTER_PRIMITIVE(obj) (dynamic_cast<const SPFilterPrimitive*>((SPObject*)obj) != NULL) 24 25 namespace Inkscape { 26 namespace Filters { 27 class Filter; 28 class FilterPrimitive; 29 } } 30 31 class SPFilterPrimitive : public SPObject, public SPDimensions { 32 public: 33 SPFilterPrimitive(); 34 ~SPFilterPrimitive() override; 35 36 int image_in, image_out; 37 38 protected: 39 void build(SPDocument* doc, Inkscape::XML::Node* repr) override; 40 void release() override; 41 42 void set(SPAttr key, char const* value) override; 43 44 void update(SPCtx* ctx, unsigned int flags) override; 45 46 Inkscape::XML::Node* write(Inkscape::XML::Document* doc, Inkscape::XML::Node* repr, unsigned int flags) override; 47 48 public: 49 virtual void build_renderer(Inkscape::Filters::Filter* filter) = 0; 50 51 /* Calculate the filter's effect on the region */ 52 virtual Geom::Rect calculate_region(Geom::Rect region); 53 54 /* Return true if the object should be allowed to use this filter */ valid_for(SPObject const * obj)55 virtual bool valid_for(SPObject const *obj) const { 56 // This is used by feImage to stop infinate loops. 57 return true; 58 }; 59 60 /* Common initialization for filter primitives */ 61 void renderer_common(Inkscape::Filters::FilterPrimitive *nr_prim); 62 63 int name_previous_out(); 64 int read_in(char const *name); 65 int read_result(char const *name); 66 }; 67 68 #endif 69 /* 70 Local Variables: 71 mode:c++ 72 c-file-style:"stroustrup" 73 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) 74 indent-tabs-mode:nil 75 fill-column:99 76 End: 77 */ 78 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 : 79