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/** \file
* SVG <feBlend> implementation.
*
*/
/*
* Authors:
* Hugo Rodrigues <haa.rodrigues@gmail.com>
* Niko Kiirala <niko@kiirala.com>
* Abhishek Sharma
*
* 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 "sp-filter.h"
#include "filters/blend.h"
#include "attributes.h"
#include "svg/svg.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
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*/
object->readAttr( "mode" );
object->readAttr( "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
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
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
sp_feBlend_update(SPObject *object, SPCtx *ctx, guint flags)
{
SPFeBlend *blend = SP_FEBLEND(object);
if (flags & SP_OBJECT_MODIFIED_FLAG) {
object->readAttr( "mode" );
object->readAttr( "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);
//XML Tree being used directly here while it shouldn't be.
object->getRepr()->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 *
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:fileencoding=utf-8:textwidth=99 :
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