#define __SP_FEBLEND_CPP__ /** \file * SVG <feBlend> implementation. * */ /* * Authors: * Hugo Rodrigues <haa.rodrigues@gmail.com> * Niko Kiirala <niko@kiirala.com> * * Copyright (C) 2006,2007 authors * * Released under GNU GPL, read the file 'COPYING' for more information */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include <string.h> #include "attributes.h" #include "svg/svg.h" #include "blend.h" #include "xml/repr.h" #include "display/nr-filter.h" #include "display/nr-filter-primitive.h" #include "display/nr-filter-blend.h" #include "display/nr-filter-types.h" /* FeBlend base class */ static void sp_feBlend_class_init(SPFeBlendClass *klass); static void sp_feBlend_init(SPFeBlend *feBlend); static void sp_feBlend_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr); static void sp_feBlend_release(SPObject *object); static void sp_feBlend_set(SPObject *object, unsigned int key, gchar const *value); static void sp_feBlend_update(SPObject *object, SPCtx *ctx, guint flags); static Inkscape::XML::Node *sp_feBlend_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags); static void sp_feBlend_build_renderer(SPFilterPrimitive *sp_prim, Inkscape::Filters::Filter *filter); static SPFilterPrimitiveClass *feBlend_parent_class; GType sp_feBlend_get_type() { static GType feBlend_type = 0; if (!feBlend_type) { GTypeInfo feBlend_info = { sizeof(SPFeBlendClass), NULL, NULL, (GClassInitFunc) sp_feBlend_class_init, NULL, NULL, sizeof(SPFeBlend), 16, (GInstanceInitFunc) sp_feBlend_init, NULL, /* value_table */ }; feBlend_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeBlend", &feBlend_info, (GTypeFlags)0); } return feBlend_type; } static void sp_feBlend_class_init(SPFeBlendClass *klass) { SPObjectClass *sp_object_class = (SPObjectClass *)klass; SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass; feBlend_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass); sp_object_class->build = sp_feBlend_build; sp_object_class->release = sp_feBlend_release; sp_object_class->write = sp_feBlend_write; sp_object_class->set = sp_feBlend_set; sp_object_class->update = sp_feBlend_update; sp_primitive_class->build_renderer = sp_feBlend_build_renderer; } static void sp_feBlend_init(SPFeBlend *feBlend) { feBlend->in2 = Inkscape::Filters::NR_FILTER_SLOT_NOT_SET; } /** * Reads the Inkscape::XML::Node, and initializes SPFeBlend variables. For this to get called, * our name must be associated with a repr via "sp_object_type_register". Best done through * sp-object-repr.cpp's repr_name_entries array. */ static void 00097 sp_feBlend_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr) { SPFeBlend *blend = SP_FEBLEND(object); if (((SPObjectClass *) feBlend_parent_class)->build) { ((SPObjectClass *) feBlend_parent_class)->build(object, document, repr); } /*LOAD ATTRIBUTES FROM REPR HERE*/ sp_object_read_attr(object, "mode"); sp_object_read_attr(object, "in2"); /* Unlike normal in, in2 is required attribute. Make sure, we can call * it by some name. */ if (blend->in2 == Inkscape::Filters::NR_FILTER_SLOT_NOT_SET || blend->in2 == Inkscape::Filters::NR_FILTER_UNNAMED_SLOT) { SPFilter *parent = SP_FILTER(object->parent); blend->in2 = sp_filter_primitive_name_previous_out(blend); repr->setAttribute("in2", sp_filter_name_for_image(parent, blend->in2)); } } /** * Drops any allocated memory. */ static void 00124 sp_feBlend_release(SPObject *object) { if (((SPObjectClass *) feBlend_parent_class)->release) ((SPObjectClass *) feBlend_parent_class)->release(object); } static Inkscape::Filters::FilterBlendMode sp_feBlend_readmode(gchar const *value) { if (!value) return Inkscape::Filters::BLEND_NORMAL; switch (value[0]) { case 'n': if (strncmp(value, "normal", 6) == 0) return Inkscape::Filters::BLEND_NORMAL; break; case 'm': if (strncmp(value, "multiply", 8) == 0) return Inkscape::Filters::BLEND_MULTIPLY; break; case 's': if (strncmp(value, "screen", 6) == 0) return Inkscape::Filters::BLEND_SCREEN; break; case 'd': if (strncmp(value, "darken", 6) == 0) return Inkscape::Filters::BLEND_DARKEN; break; case 'l': if (strncmp(value, "lighten", 7) == 0) return Inkscape::Filters::BLEND_LIGHTEN; break; default: // do nothing by default break; } return Inkscape::Filters::BLEND_NORMAL; } /** * Sets a specific value in the SPFeBlend. */ static void 00165 sp_feBlend_set(SPObject *object, unsigned int key, gchar const *value) { SPFeBlend *feBlend = SP_FEBLEND(object); (void)feBlend; Inkscape::Filters::FilterBlendMode mode; int input; switch(key) { /*DEAL WITH SETTING ATTRIBUTES HERE*/ case SP_ATTR_MODE: mode = sp_feBlend_readmode(value); if (mode != feBlend->blend_mode) { feBlend->blend_mode = mode; object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG); } break; case SP_ATTR_IN2: input = sp_filter_primitive_read_in(feBlend, value); if (input != feBlend->in2) { feBlend->in2 = input; object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG); } break; default: if (((SPObjectClass *) feBlend_parent_class)->set) ((SPObjectClass *) feBlend_parent_class)->set(object, key, value); break; } } /** * Receives update notifications. */ static void 00200 sp_feBlend_update(SPObject *object, SPCtx *ctx, guint flags) { SPFeBlend *blend = SP_FEBLEND(object); if (flags & SP_OBJECT_MODIFIED_FLAG) { sp_object_read_attr(object, "mode"); sp_object_read_attr(object, "in2"); } /* Unlike normal in, in2 is required attribute. Make sure, we can call * it by some name. */ if (blend->in2 == Inkscape::Filters::NR_FILTER_SLOT_NOT_SET || blend->in2 == Inkscape::Filters::NR_FILTER_UNNAMED_SLOT) { SPFilter *parent = SP_FILTER(object->parent); blend->in2 = sp_filter_primitive_name_previous_out(blend); object->repr->setAttribute("in2", sp_filter_name_for_image(parent, blend->in2)); } if (((SPObjectClass *) feBlend_parent_class)->update) { ((SPObjectClass *) feBlend_parent_class)->update(object, ctx, flags); } } /** * Writes its settings to an incoming repr object, if any. */ static Inkscape::XML::Node * 00228 sp_feBlend_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags) { SPFeBlend *blend = SP_FEBLEND(object); SPFilter *parent = SP_FILTER(object->parent); if (!repr) { repr = doc->createElement("svg:feBlend"); } gchar const *out_name = sp_filter_name_for_image(parent, blend->in2); if (out_name) { repr->setAttribute("in2", out_name); } else { SPObject *i = parent->children; while (i && i->next != object) i = i->next; SPFilterPrimitive *i_prim = SP_FILTER_PRIMITIVE(i); out_name = sp_filter_name_for_image(parent, i_prim->image_out); repr->setAttribute("in2", out_name); if (!out_name) { g_warning("Unable to set in2 for feBlend"); } } char const *mode; switch(blend->blend_mode) { case Inkscape::Filters::BLEND_NORMAL: mode = "normal"; break; case Inkscape::Filters::BLEND_MULTIPLY: mode = "multiply"; break; case Inkscape::Filters::BLEND_SCREEN: mode = "screen"; break; case Inkscape::Filters::BLEND_DARKEN: mode = "darken"; break; case Inkscape::Filters::BLEND_LIGHTEN: mode = "lighten"; break; default: mode = 0; } repr->setAttribute("mode", mode); if (((SPObjectClass *) feBlend_parent_class)->write) { ((SPObjectClass *) feBlend_parent_class)->write(object, doc, repr, flags); } return repr; } static void sp_feBlend_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter) { g_assert(primitive != NULL); g_assert(filter != NULL); SPFeBlend *sp_blend = SP_FEBLEND(primitive); int primitive_n = filter->add_primitive(Inkscape::Filters::NR_FILTER_BLEND); Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n); Inkscape::Filters::FilterBlend *nr_blend = dynamic_cast<Inkscape::Filters::FilterBlend*>(nr_primitive); g_assert(nr_blend != NULL); sp_filter_primitive_renderer_common(primitive, nr_primitive); nr_blend->set_mode(sp_blend->blend_mode); nr_blend->set_input(1, sp_blend->in2); } /* 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:encoding=utf-8:textwidth=99 :