sp-pattern.cpp revision a3ea6afbbd551cd444a77ab93b342dfc25f6639e
#define __SP_PATTERN_C__
/*
* SVG <pattern> implementation
*
* Author:
* Lauris Kaplinski <lauris@kaplinski.com>
* bulia byak <buliabyak@users.sf.net>
*
* Copyright (C) 2002 Lauris Kaplinski
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <cstring>
#include <string>
#include <libnr/nr-matrix-ops.h>
#include "libnr/nr-matrix-fns.h"
#include <2geom/transforms.h>
#include "macros.h"
#include "svg/svg.h"
#include "display/nr-arena.h"
#include "display/nr-arena-group.h"
#include "attributes.h"
#include "document-private.h"
#include "uri.h"
#include "sp-pattern.h"
#include "xml/repr.h"
#include <sigc++/functors/ptr_fun.h>
#include <sigc++/adaptors/bind.h>
/*
* Pattern
*/
class SPPatPainter;
struct SPPatPainter {
SPPainter painter;
SPPattern *pat;
Geom::Matrix ps2px;
Geom::Matrix px2ps;
Geom::Matrix pcs2px;
NRArena *arena;
unsigned int dkey;
NRArenaItem *root;
bool use_cached_tile;
Geom::Matrix ca2pa;
Geom::Matrix pa2ca;
NRRectL cached_bbox;
NRPixBlock cached_tile;
std::map<SPObject *, sigc::connection> *_release_connections;
};
static void sp_pattern_class_init (SPPatternClass *klass);
static void sp_pattern_init (SPPattern *gr);
static void sp_pattern_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
static void sp_pattern_release (SPObject *object);
static void sp_pattern_set (SPObject *object, unsigned int key, const gchar *value);
static void sp_pattern_child_added (SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref);
static void sp_pattern_update (SPObject *object, SPCtx *ctx, unsigned int flags);
static void sp_pattern_modified (SPObject *object, unsigned int flags);
static void pattern_ref_changed(SPObject *old_ref, SPObject *ref, SPPattern *pat);
static void pattern_ref_modified (SPObject *ref, guint flags, SPPattern *pattern);
static SPPainter *sp_pattern_painter_new (SPPaintServer *ps, Geom::Matrix const &full_transform, Geom::Matrix const &parent_transform, const NRRect *bbox);
static void sp_pattern_painter_free (SPPaintServer *ps, SPPainter *painter);
static SPPaintServerClass * pattern_parent_class;
GType
sp_pattern_get_type (void)
{
static GType pattern_type = 0;
if (!pattern_type) {
GTypeInfo pattern_info = {
sizeof (SPPatternClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) sp_pattern_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (SPPattern),
16, /* n_preallocs */
(GInstanceInitFunc) sp_pattern_init,
NULL, /* value_table */
};
pattern_type = g_type_register_static (SP_TYPE_PAINT_SERVER, "SPPattern", &pattern_info, (GTypeFlags)0);
}
return pattern_type;
}
static void
sp_pattern_class_init (SPPatternClass *klass)
{
SPObjectClass *sp_object_class;
SPPaintServerClass *ps_class;
sp_object_class = (SPObjectClass *) klass;
ps_class = (SPPaintServerClass *) klass;
pattern_parent_class = (SPPaintServerClass*)g_type_class_ref (SP_TYPE_PAINT_SERVER);
sp_object_class->build = sp_pattern_build;
sp_object_class->release = sp_pattern_release;
sp_object_class->set = sp_pattern_set;
sp_object_class->child_added = sp_pattern_child_added;
sp_object_class->update = sp_pattern_update;
sp_object_class->modified = sp_pattern_modified;
// do we need _write? seems to work without it
ps_class->painter_new = sp_pattern_painter_new;
ps_class->painter_free = sp_pattern_painter_free;
}
static void
sp_pattern_init (SPPattern *pat)
{
pat->ref = new SPPatternReference(SP_OBJECT(pat));
pat->ref->changedSignal().connect(sigc::bind(sigc::ptr_fun(pattern_ref_changed), pat));
pat->patternUnits = SP_PATTERN_UNITS_OBJECTBOUNDINGBOX;
pat->patternUnits_set = FALSE;
pat->patternContentUnits = SP_PATTERN_UNITS_USERSPACEONUSE;
pat->patternContentUnits_set = FALSE;
pat->patternTransform = NR::identity();
pat->patternTransform_set = FALSE;
pat->x.unset();
pat->y.unset();
pat->width.unset();
pat->height.unset();
pat->viewBox_set = FALSE;
new (&pat->modified_connection) sigc::connection();
}
static void
sp_pattern_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
{
if (((SPObjectClass *) pattern_parent_class)->build)
(* ((SPObjectClass *) pattern_parent_class)->build) (object, document, repr);
sp_object_read_attr (object, "patternUnits");
sp_object_read_attr (object, "patternContentUnits");
sp_object_read_attr (object, "patternTransform");
sp_object_read_attr (object, "x");
sp_object_read_attr (object, "y");
sp_object_read_attr (object, "width");
sp_object_read_attr (object, "height");
sp_object_read_attr (object, "viewBox");
sp_object_read_attr (object, "xlink:href");
/* Register ourselves */
sp_document_add_resource (document, "pattern", object);
}
static void
sp_pattern_release (SPObject *object)
{
SPPattern *pat;
pat = (SPPattern *) object;
if (SP_OBJECT_DOCUMENT (object)) {
/* Unregister ourselves */
sp_document_remove_resource (SP_OBJECT_DOCUMENT (object), "pattern", SP_OBJECT (object));
}
if (pat->ref) {
pat->modified_connection.disconnect();
pat->ref->detach();
delete pat->ref;
pat->ref = NULL;
}
pat->modified_connection.~connection();
if (((SPObjectClass *) pattern_parent_class)->release)
((SPObjectClass *) pattern_parent_class)->release (object);
}
static void
sp_pattern_set (SPObject *object, unsigned int key, const gchar *value)
{
SPPattern *pat = SP_PATTERN (object);
switch (key) {
case SP_ATTR_PATTERNUNITS:
if (value) {
if (!strcmp (value, "userSpaceOnUse")) {
pat->patternUnits = SP_PATTERN_UNITS_USERSPACEONUSE;
} else {
pat->patternUnits = SP_PATTERN_UNITS_OBJECTBOUNDINGBOX;
}
pat->patternUnits_set = TRUE;
} else {
pat->patternUnits_set = FALSE;
}
object->requestModified(SP_OBJECT_MODIFIED_FLAG);
break;
case SP_ATTR_PATTERNCONTENTUNITS:
if (value) {
if (!strcmp (value, "userSpaceOnUse")) {
pat->patternContentUnits = SP_PATTERN_UNITS_USERSPACEONUSE;
} else {
pat->patternContentUnits = SP_PATTERN_UNITS_OBJECTBOUNDINGBOX;
}
pat->patternContentUnits_set = TRUE;
} else {
pat->patternContentUnits_set = FALSE;
}
object->requestModified(SP_OBJECT_MODIFIED_FLAG);
break;
case SP_ATTR_PATTERNTRANSFORM: {
Geom::Matrix t;
if (value && sp_svg_transform_read (value, &t)) {
pat->patternTransform = t;
pat->patternTransform_set = TRUE;
} else {
pat->patternTransform = NR::identity();
pat->patternTransform_set = FALSE;
}
object->requestModified(SP_OBJECT_MODIFIED_FLAG);
break;
}
case SP_ATTR_X:
pat->x.readOrUnset(value);
object->requestModified(SP_OBJECT_MODIFIED_FLAG);
break;
case SP_ATTR_Y:
pat->y.readOrUnset(value);
object->requestModified(SP_OBJECT_MODIFIED_FLAG);
break;
case SP_ATTR_WIDTH:
pat->width.readOrUnset(value);
object->requestModified(SP_OBJECT_MODIFIED_FLAG);
break;
case SP_ATTR_HEIGHT:
pat->height.readOrUnset(value);
object->requestModified(SP_OBJECT_MODIFIED_FLAG);
break;
case SP_ATTR_VIEWBOX: {
/* fixme: Think (Lauris) */
double x, y, width, height;
char *eptr;
if (value) {
eptr = (gchar *) value;
x = g_ascii_strtod (eptr, &eptr);
while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
y = g_ascii_strtod (eptr, &eptr);
while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
width = g_ascii_strtod (eptr, &eptr);
while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
height = g_ascii_strtod (eptr, &eptr);
while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
if ((width > 0) && (height > 0)) {
pat->viewBox.x0 = x;
pat->viewBox.y0 = y;
pat->viewBox.x1 = x + width;
pat->viewBox.y1 = y + height;
pat->viewBox_set = TRUE;
} else {
pat->viewBox_set = FALSE;
}
} else {
pat->viewBox_set = FALSE;
}
object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
break;
}
case SP_ATTR_XLINK_HREF:
if ( value && pat->href && ( strcmp(value, pat->href) == 0 ) ) {
/* Href unchanged, do nothing. */
} else {
g_free(pat->href);
pat->href = NULL;
if (value) {
// First, set the href field; it's only used in the "unchanged" check above.
pat->href = g_strdup(value);
// Now do the attaching, which emits the changed signal.
if (value) {
try {
pat->ref->attach(Inkscape::URI(value));
} catch (Inkscape::BadURIException &e) {
g_warning("%s", e.what());
pat->ref->detach();
}
} else {
pat->ref->detach();
}
}
}
break;
default:
if (((SPObjectClass *) pattern_parent_class)->set)
((SPObjectClass *) pattern_parent_class)->set (object, key, value);
break;
}
}
static void
sp_pattern_child_added (SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
{
SPPattern *pat = SP_PATTERN (object);
if (((SPObjectClass *) (pattern_parent_class))->child_added)
(* ((SPObjectClass *) (pattern_parent_class))->child_added) (object, child, ref);
SPObject *ochild = sp_object_get_child_by_repr(object, child);
if (SP_IS_ITEM (ochild)) {
SPPaintServer *ps = SP_PAINT_SERVER (pat);
unsigned position = sp_item_pos_in_parent(SP_ITEM(ochild));
for (SPPainter *p = ps->painters; p != NULL; p = p->next) {
SPPatPainter *pp = (SPPatPainter *) p;
NRArenaItem *ai = sp_item_invoke_show (SP_ITEM (ochild), pp->arena, pp->dkey, SP_ITEM_REFERENCE_FLAGS);
if (ai) {
nr_arena_item_add_child (pp->root, ai, NULL);
nr_arena_item_set_order (ai, position);
nr_arena_item_unref (ai);
}
}
}
}
/* TODO: do we need a ::remove_child handler? */
/* fixme: We need ::order_changed handler too (Lauris) */
GSList *
pattern_getchildren (SPPattern *pat)
{
GSList *l = NULL;
for (SPPattern *pat_i = pat; pat_i != NULL; pat_i = pat_i->ref ? pat_i->ref->getObject() : NULL) {
if (sp_object_first_child(SP_OBJECT(pat_i))) { // find the first one with children
for (SPObject *child = sp_object_first_child(SP_OBJECT (pat)) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
l = g_slist_prepend (l, child);
}
break; // do not go further up the chain if children are found
}
}
return l;
}
static void
sp_pattern_update (SPObject *object, SPCtx *ctx, unsigned int flags)
{
SPPattern *pat = SP_PATTERN (object);
if (flags & SP_OBJECT_MODIFIED_FLAG) flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
flags &= SP_OBJECT_MODIFIED_CASCADE;
GSList *l = pattern_getchildren (pat);
l = g_slist_reverse (l);
while (l) {
SPObject *child = SP_OBJECT (l->data);
sp_object_ref (child, NULL);
l = g_slist_remove (l, child);
if (flags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
child->updateDisplay(ctx, flags);
}
sp_object_unref (child, NULL);
}
}
static void
sp_pattern_modified (SPObject *object, guint flags)
{
SPPattern *pat = SP_PATTERN (object);
if (flags & SP_OBJECT_MODIFIED_FLAG) flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
flags &= SP_OBJECT_MODIFIED_CASCADE;
GSList *l = pattern_getchildren (pat);
l = g_slist_reverse (l);
while (l) {
SPObject *child = SP_OBJECT (l->data);
sp_object_ref (child, NULL);
l = g_slist_remove (l, child);
if (flags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
child->emitModified(flags);
}
sp_object_unref (child, NULL);
}
}
/**
Gets called when the pattern is reattached to another <pattern>
*/
static void
pattern_ref_changed(SPObject *old_ref, SPObject *ref, SPPattern *pat)
{
if (old_ref) {
pat->modified_connection.disconnect();
}
if (SP_IS_PATTERN (ref)) {
pat->modified_connection = ref->connectModified(sigc::bind<2>(sigc::ptr_fun(&pattern_ref_modified), pat));
}
pattern_ref_modified (ref, 0, pat);
}
/**
Gets called when the referenced <pattern> is changed
*/
static void
pattern_ref_modified (SPObject */*ref*/, guint /*flags*/, SPPattern *pattern)
{
if (SP_IS_OBJECT (pattern))
SP_OBJECT (pattern)->requestModified(SP_OBJECT_MODIFIED_FLAG);
/* Conditional to avoid causing infinite loop if there's a cycle in the href chain. */
}
guint
pattern_users (SPPattern *pattern)
{
return SP_OBJECT (pattern)->hrefcount;
}
SPPattern *
pattern_chain (SPPattern *pattern)
{
SPDocument *document = SP_OBJECT_DOCUMENT (pattern);
Inkscape::XML::Document *xml_doc = sp_document_repr_doc(document);
Inkscape::XML::Node *defsrepr = SP_OBJECT_REPR (SP_DOCUMENT_DEFS (document));
Inkscape::XML::Node *repr = xml_doc->createElement("svg:pattern");
repr->setAttribute("inkscape:collect", "always");
gchar *parent_ref = g_strconcat ("#", SP_OBJECT_REPR(pattern)->attribute("id"), NULL);
repr->setAttribute("xlink:href", parent_ref);
g_free (parent_ref);
defsrepr->addChild(repr, NULL);
const gchar *child_id = repr->attribute("id");
SPObject *child = document->getObjectById(child_id);
g_assert (SP_IS_PATTERN (child));
return SP_PATTERN (child);
}
SPPattern *
sp_pattern_clone_if_necessary (SPItem *item, SPPattern *pattern, const gchar *property)
{
if (pattern_users(pattern) > 1) {
pattern = pattern_chain (pattern);
gchar *href = g_strconcat ("url(#", SP_OBJECT_REPR (pattern)->attribute("id"), ")", NULL);
SPCSSAttr *css = sp_repr_css_attr_new ();
sp_repr_css_set_property (css, property, href);
sp_repr_css_change_recursive (SP_OBJECT_REPR (item), css, "style");
}
return pattern;
}
void
sp_pattern_transform_multiply (SPPattern *pattern, Geom::Matrix postmul, bool set)
{
// this formula is for a different interpretation of pattern transforms as described in (*) in sp-pattern.cpp
// for it to work, we also need sp_object_read_attr (SP_OBJECT (item), "transform");
//pattern->patternTransform = premul * item->transform * pattern->patternTransform * item->transform.inverse() * postmul;
// otherwise the formula is much simpler
if (set) {
pattern->patternTransform = postmul;
} else {
pattern->patternTransform = pattern_patternTransform(pattern) * postmul;
}
pattern->patternTransform_set = TRUE;
gchar *c=sp_svg_transform_write(pattern->patternTransform);
SP_OBJECT_REPR(pattern)->setAttribute("patternTransform", c);
g_free(c);
}
const gchar *
pattern_tile (GSList *reprs, Geom::Rect bounds, SPDocument *document, Geom::Matrix transform, Geom::Matrix move)
{
Inkscape::XML::Document *xml_doc = sp_document_repr_doc(document);
Inkscape::XML::Node *defsrepr = SP_OBJECT_REPR (SP_DOCUMENT_DEFS (document));
Inkscape::XML::Node *repr = xml_doc->createElement("svg:pattern");
repr->setAttribute("patternUnits", "userSpaceOnUse");
sp_repr_set_svg_double(repr, "width", bounds.dimensions()[Geom::X]);
sp_repr_set_svg_double(repr, "height", bounds.dimensions()[Geom::Y]);
gchar *t=sp_svg_transform_write(transform);
repr->setAttribute("patternTransform", t);
g_free(t);
defsrepr->appendChild(repr);
const gchar *pat_id = repr->attribute("id");
SPObject *pat_object = document->getObjectById(pat_id);
for (GSList *i = reprs; i != NULL; i = i->next) {
Inkscape::XML::Node *node = (Inkscape::XML::Node *)(i->data);
SPItem *copy = SP_ITEM(pat_object->appendChildRepr(node));
Geom::Matrix dup_transform;
if (!sp_svg_transform_read (node->attribute("transform"), &dup_transform))
dup_transform = Geom::identity();
dup_transform *= move;
sp_item_write_transform(copy, SP_OBJECT_REPR(copy), dup_transform, NULL, false);
}
Inkscape::GC::release(repr);
return pat_id;
}
SPPattern *
pattern_getroot (SPPattern *pat)
{
for (SPPattern *pat_i = pat; pat_i != NULL; pat_i = pat_i->ref ? pat_i->ref->getObject() : NULL) {
if (sp_object_first_child(SP_OBJECT(pat_i))) { // find the first one with children
return pat_i;
}
}
return pat; // document is broken, we can't get to root; but at least we can return pat which is supposedly a valid pattern
}
// Access functions that look up fields up the chain of referenced patterns and return the first one which is set
// FIXME: all of them must use chase_hrefs the same as in SPGradient, to avoid lockup on circular refs
guint pattern_patternUnits (SPPattern *pat)
{
for (SPPattern *pat_i = pat; pat_i != NULL; pat_i = pat_i->ref ? pat_i->ref->getObject() : NULL) {
if (pat_i->patternUnits_set)
return pat_i->patternUnits;
}
return pat->patternUnits;
}
guint pattern_patternContentUnits (SPPattern *pat)
{
for (SPPattern *pat_i = pat; pat_i != NULL; pat_i = pat_i->ref ? pat_i->ref->getObject() : NULL) {
if (pat_i->patternContentUnits_set)
return pat_i->patternContentUnits;
}
return pat->patternContentUnits;
}
Geom::Matrix const &pattern_patternTransform(SPPattern const *pat)
{
for (SPPattern const *pat_i = pat; pat_i != NULL; pat_i = pat_i->ref ? pat_i->ref->getObject() : NULL) {
if (pat_i->patternTransform_set)
return pat_i->patternTransform;
}
return pat->patternTransform;
}
gdouble pattern_x (SPPattern *pat)
{
for (SPPattern *pat_i = pat; pat_i != NULL; pat_i = pat_i->ref ? pat_i->ref->getObject() : NULL) {
if (pat_i->x._set)
return pat_i->x.computed;
}
return 0;
}
gdouble pattern_y (SPPattern *pat)
{
for (SPPattern *pat_i = pat; pat_i != NULL; pat_i = pat_i->ref ? pat_i->ref->getObject() : NULL) {
if (pat_i->y._set)
return pat_i->y.computed;
}
return 0;
}
gdouble pattern_width (SPPattern *pat)
{
for (SPPattern *pat_i = pat; pat_i != NULL; pat_i = pat_i->ref ? pat_i->ref->getObject() : NULL) {
if (pat_i->width._set)
return pat_i->width.computed;
}
return 0;
}
gdouble pattern_height (SPPattern *pat)
{
for (SPPattern *pat_i = pat; pat_i != NULL; pat_i = pat_i->ref ? pat_i->ref->getObject() : NULL) {
if (pat_i->height._set)
return pat_i->height.computed;
}
return 0;
}
NRRect *pattern_viewBox (SPPattern *pat)
{
for (SPPattern *pat_i = pat; pat_i != NULL; pat_i = pat_i->ref ? pat_i->ref->getObject() : NULL) {
if (pat_i->viewBox_set)
return &(pat_i->viewBox);
}
return &(pat->viewBox);
}
bool pattern_hasItemChildren (SPPattern *pat)
{
for (SPObject *child = sp_object_first_child(SP_OBJECT(pat)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
if (SP_IS_ITEM (child)) {
return true;
}
}
return false;
}
/* Painter */
static void sp_pat_fill (SPPainter *painter, NRPixBlock *pb);
// item in this pattern is about to be deleted, hide it on our arena and disconnect
void
sp_pattern_painter_release (SPObject *obj, SPPatPainter *painter)
{
std::map<SPObject *, sigc::connection>::iterator iter = painter->_release_connections->find(obj);
if (iter != painter->_release_connections->end()) {
iter->second.disconnect();
painter->_release_connections->erase(obj);
}
sp_item_invoke_hide(SP_ITEM(obj), painter->dkey);
}
/**
Creates a painter (i.e. the thing that does actual filling at the given zoom).
See (*) below for why the parent_transform may be necessary.
*/
static SPPainter *
sp_pattern_painter_new (SPPaintServer *ps, Geom::Matrix const &full_transform, Geom::Matrix const &/*parent_transform*/, const NRRect *bbox)
{
SPPattern *pat = SP_PATTERN (ps);
SPPatPainter *pp = g_new (SPPatPainter, 1);
pp->painter.type = SP_PAINTER_IND;
pp->painter.fill = sp_pat_fill;
pp->pat = pat;
if (pattern_patternUnits (pat) == SP_PATTERN_UNITS_OBJECTBOUNDINGBOX) {
/* BBox to user coordinate system */
Geom::Matrix bbox2user (bbox->x1 - bbox->x0, 0.0, 0.0, bbox->y1 - bbox->y0, bbox->x0, bbox->y0);
// the final patternTransform, taking into account bbox
Geom::Matrix const ps2user(pattern_patternTransform(pat) * bbox2user);
// see (*) comment below
pp->ps2px = ps2user * full_transform;
} else {
/* Problem: What to do, if we have mixed lengths and percentages? */
/* Currently we do ignore percentages at all, but that is not good (lauris) */
/* fixme: We may try to normalize here too, look at linearGradient (Lauris) */
// (*) The spec says, "This additional transformation matrix [patternTransform] is
// post-multiplied to (i.e., inserted to the right of) any previously defined
// transformations, including the implicit transformation necessary to convert from
// object bounding box units to user space." To me, this means that the order should be:
// item_transform * patternTransform * parent_transform
// However both Batik and Adobe plugin use:
// patternTransform * item_transform * parent_transform
// So here I comply with the majority opinion, but leave my interpretation commented out below.
// (To get item_transform, I subtract parent from full.)
//pp->ps2px = (full_transform / parent_transform) * pattern_patternTransform(pat) * parent_transform;
pp->ps2px = pattern_patternTransform(pat) * full_transform;
}
pp->px2ps = pp->ps2px.inverse();
if (pat->viewBox_set) {
gdouble tmp_x = pattern_width (pat) / (pattern_viewBox(pat)->x1 - pattern_viewBox(pat)->x0);
gdouble tmp_y = pattern_height (pat) / (pattern_viewBox(pat)->y1 - pattern_viewBox(pat)->y0);
// FIXME: preserveAspectRatio must be taken into account here too!
Geom::Matrix vb2ps (tmp_x, 0.0, 0.0, tmp_y, pattern_x(pat) - pattern_viewBox(pat)->x0 * tmp_x, pattern_y(pat) - pattern_viewBox(pat)->y0 * tmp_y);
Geom::Matrix vb2us = vb2ps * pattern_patternTransform(pat);
// see (*)
pp->pcs2px = vb2us * full_transform;
} else {
/* No viewbox, have to parse units */
if (pattern_patternContentUnits (pat) == SP_PATTERN_UNITS_OBJECTBOUNDINGBOX) {
/* BBox to user coordinate system */
Geom::Matrix bbox2user (bbox->x1 - bbox->x0, 0.0, 0.0, bbox->y1 - bbox->y0, bbox->x0, bbox->y0);
Geom::Matrix pcs2user = pattern_patternTransform(pat) * bbox2user;
// see (*)
pp->pcs2px = pcs2user * full_transform;
} else {
// see (*)
//pcs2px = (full_transform / parent_transform) * pattern_patternTransform(pat) * parent_transform;
pp->pcs2px = pattern_patternTransform(pat) * full_transform;
}
pp->pcs2px = Geom::Translate (pattern_x (pat), pattern_y (pat)) * pp->pcs2px;
}
/* Create arena */
pp->arena = NRArena::create();
pp->dkey = sp_item_display_key_new (1);
/* Create group */
pp->root = NRArenaGroup::create(pp->arena);
/* Show items */
pp->_release_connections = new std::map<SPObject *, sigc::connection>;
for (SPPattern *pat_i = pat; pat_i != NULL; pat_i = pat_i->ref ? pat_i->ref->getObject() : NULL) {
if (pat_i && SP_IS_OBJECT (pat_i) && pattern_hasItemChildren(pat_i)) { // find the first one with item children
for (SPObject *child = sp_object_first_child(SP_OBJECT(pat_i)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
if (SP_IS_ITEM (child)) {
// for each item in pattern,
NRArenaItem *cai;
// show it on our arena,
cai = sp_item_invoke_show (SP_ITEM (child), pp->arena, pp->dkey, SP_ITEM_REFERENCE_FLAGS);
// add to the group,
nr_arena_item_append_child (pp->root, cai);
// and connect to the release signal in case the item gets deleted
pp->_release_connections->insert(std::make_pair(child, child->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_pattern_painter_release), pp))));
}
}
break; // do not go further up the chain if children are found
}
}
{
NRRect one_tile,tr_tile;
one_tile.x0=pattern_x(pp->pat);
one_tile.y0=pattern_y(pp->pat);
one_tile.x1=one_tile.x0+pattern_width (pp->pat);
one_tile.y1=one_tile.y0+pattern_height (pp->pat);
// TODO: remove ps2px_nr after converting to 2geom
NR::Matrix ps2px_nr = from_2geom(pp->ps2px);
nr_rect_d_matrix_transform (&tr_tile, &one_tile, &ps2px_nr);
int tr_width=(int)ceil(1.3*(tr_tile.x1-tr_tile.x0));
int tr_height=(int)ceil(1.3*(tr_tile.y1-tr_tile.y0));
// if ( tr_width < 10000 && tr_height < 10000 && tr_width*tr_height < 1000000 ) {
pp->use_cached_tile=false;//true;
if ( tr_width > 1000 ) tr_width=1000;
if ( tr_height > 1000 ) tr_height=1000;
pp->cached_bbox.x0=0;
pp->cached_bbox.y0=0;
pp->cached_bbox.x1=tr_width;
pp->cached_bbox.y1=tr_height;
if (pp->use_cached_tile) {
nr_pixblock_setup (&pp->cached_tile,NR_PIXBLOCK_MODE_R8G8B8A8N, pp->cached_bbox.x0, pp->cached_bbox.y0, pp->cached_bbox.x1, pp->cached_bbox.y1,TRUE);
}
pp->pa2ca[0]=((double)tr_width)/(one_tile.x1-one_tile.x0);
pp->pa2ca[1]=0;
pp->pa2ca[2]=0;
pp->pa2ca[3]=((double)tr_height)/(one_tile.y1-one_tile.y0);
pp->pa2ca[4]=-one_tile.x0*pp->pa2ca[0];
pp->pa2ca[5]=-one_tile.y0*pp->pa2ca[1];
pp->ca2pa[0]=(one_tile.x1-one_tile.x0)/((double)tr_width);
pp->ca2pa[1]=0;
pp->ca2pa[2]=0;
pp->ca2pa[3]=(one_tile.y1-one_tile.y0)/((double)tr_height);
pp->ca2pa[4]=one_tile.x0;
pp->ca2pa[5]=one_tile.y0;
// } else {
// pp->use_cached_tile=false;
// }
}
NRGC gc(NULL);
if ( pp->use_cached_tile ) {
gc.transform=pp->pa2ca;
} else {
gc.transform = pp->pcs2px;
}
nr_arena_item_invoke_update (pp->root, NULL, &gc, NR_ARENA_ITEM_STATE_ALL, NR_ARENA_ITEM_STATE_ALL);
if ( pp->use_cached_tile ) {
nr_arena_item_invoke_render (NULL, pp->root, &pp->cached_bbox, &pp->cached_tile, 0);
} else {
// nothing to do now
}
return (SPPainter *) pp;
}
static void
sp_pattern_painter_free (SPPaintServer */*ps*/, SPPainter *painter)
{
SPPatPainter *pp = (SPPatPainter *) painter;
// free our arena
if (pp->arena) {
((NRObject *) pp->arena)->unreference();
pp->arena = NULL;
}
// disconnect all connections
std::map<SPObject *, sigc::connection>::iterator iter;
for (iter = pp->_release_connections->begin() ; iter!=pp->_release_connections->end() ; iter++) {
iter->second.disconnect();
}
pp->_release_connections->clear();
delete pp->_release_connections;
if ( pp->use_cached_tile ) nr_pixblock_release(&pp->cached_tile);
g_free (pp);
}
void
get_cached_tile_pixel(SPPatPainter* pp,double x,double y,unsigned char &r,unsigned char &g,unsigned char &b,unsigned char &a)
{
int ca_h=(int)floor(x);
int ca_v=(int)floor(y);
int r_x=(int)floor(16*(x-floor(x)));
int r_y=(int)floor(16*(y-floor(y)));
unsigned int tl_m=(16-r_x)*(16-r_y);
unsigned int bl_m=(16-r_x)*r_y;
unsigned int tr_m=r_x*(16-r_y);
unsigned int br_m=r_x*r_y;
int cb_h=ca_h+1;
int cb_v=ca_v+1;
if ( cb_h >= pp->cached_bbox.x1 ) cb_h=0;
if ( cb_v >= pp->cached_bbox.y1 ) cb_v=0;
unsigned char* tlx=NR_PIXBLOCK_PX(&pp->cached_tile)+(ca_v*pp->cached_tile.rs)+4*ca_h;
unsigned char* trx=NR_PIXBLOCK_PX(&pp->cached_tile)+(ca_v*pp->cached_tile.rs)+4*cb_h;
unsigned char* blx=NR_PIXBLOCK_PX(&pp->cached_tile)+(cb_v*pp->cached_tile.rs)+4*ca_h;
unsigned char* brx=NR_PIXBLOCK_PX(&pp->cached_tile)+(cb_v*pp->cached_tile.rs)+4*cb_h;
unsigned int tl_c=tlx[0];
unsigned int tr_c=trx[0];
unsigned int bl_c=blx[0];
unsigned int br_c=brx[0];
unsigned int f_c=(tl_m*tl_c+tr_m*tr_c+bl_m*bl_c+br_m*br_c)>>8;
r=f_c;
tl_c=tlx[1];
tr_c=trx[1];
bl_c=blx[1];
br_c=brx[1];
f_c=(tl_m*tl_c+tr_m*tr_c+bl_m*bl_c+br_m*br_c)>>8;
g=f_c;
tl_c=tlx[2];
tr_c=trx[2];
bl_c=blx[2];
br_c=brx[2];
f_c=(tl_m*tl_c+tr_m*tr_c+bl_m*bl_c+br_m*br_c)>>8;
b=f_c;
tl_c=tlx[3];
tr_c=trx[3];
bl_c=blx[3];
br_c=brx[3];
f_c=(tl_m*tl_c+tr_m*tr_c+bl_m*bl_c+br_m*br_c)>>8;
a=f_c;
}
static void
sp_pat_fill (SPPainter *painter, NRPixBlock *pb)
{
SPPatPainter *pp;
NRRect ba, psa;
NRRectL area;
double x, y;
pp = (SPPatPainter *) painter;
if (pattern_width (pp->pat) < NR_EPSILON) return;
if (pattern_height (pp->pat) < NR_EPSILON) return;
/* Find buffer area in gradient space */
/* fixme: This is suboptimal (Lauris) */
if ( pp->use_cached_tile ) {
double pat_w=pattern_width (pp->pat);
double pat_h=pattern_height (pp->pat);
if ( pb->mode == NR_PIXBLOCK_MODE_R8G8B8A8N || pb->mode == NR_PIXBLOCK_MODE_R8G8B8A8P ) { // same thing because it's filling an empty pixblock
unsigned char* lpx=NR_PIXBLOCK_PX(pb);
double px_y=pb->area.y0;
for (int j=pb->area.y0;j<pb->area.y1;j++) {
unsigned char* cpx=lpx;
double px_x = pb->area.x0;
double ps_x=pp->px2ps[0]*px_x+pp->px2ps[2]*px_y+pp->px2ps[4];
double ps_y=pp->px2ps[1]*px_x+pp->px2ps[3]*px_y+pp->px2ps[5];
for (int i=pb->area.x0;i<pb->area.x1;i++) {
while ( ps_x > pat_w ) ps_x-=pat_w;
while ( ps_x < 0 ) ps_x+=pat_w;
while ( ps_y > pat_h ) ps_y-=pat_h;
while ( ps_y < 0 ) ps_y+=pat_h;
double ca_x=pp->pa2ca[0]*ps_x+pp->pa2ca[2]*ps_y+pp->pa2ca[4];
double ca_y=pp->pa2ca[1]*ps_x+pp->pa2ca[3]*ps_y+pp->pa2ca[5];
unsigned char n_a,n_r,n_g,n_b;
get_cached_tile_pixel(pp,ca_x,ca_y,n_r,n_g,n_b,n_a);
cpx[0]=n_r;
cpx[1]=n_g;
cpx[2]=n_b;
cpx[3]=n_a;
px_x+=1.0;
ps_x+=pp->px2ps[0];
ps_y+=pp->px2ps[1];
cpx+=4;
}
px_y+=1.0;
lpx+=pb->rs;
}
} else if ( pb->mode == NR_PIXBLOCK_MODE_R8G8B8 ) {
unsigned char* lpx=NR_PIXBLOCK_PX(pb);
double px_y=pb->area.y0;
for (int j=pb->area.y0;j<pb->area.y1;j++) {
unsigned char* cpx=lpx;
double px_x = pb->area.x0;
double ps_x=pp->px2ps[0]*px_x+pp->px2ps[2]*px_y+pp->px2ps[4];
double ps_y=pp->px2ps[1]*px_x+pp->px2ps[3]*px_y+pp->px2ps[5];
for (int i=pb->area.x0;i<pb->area.x1;i++) {
while ( ps_x > pat_w ) ps_x-=pat_w;
while ( ps_x < 0 ) ps_x+=pat_w;
while ( ps_y > pat_h ) ps_y-=pat_h;
while ( ps_y < 0 ) ps_y+=pat_h;
double ca_x=pp->pa2ca[0]*ps_x+pp->pa2ca[2]*ps_y+pp->pa2ca[4];
double ca_y=pp->pa2ca[1]*ps_x+pp->pa2ca[3]*ps_y+pp->pa2ca[5];
unsigned char n_a,n_r,n_g,n_b;
get_cached_tile_pixel(pp,ca_x,ca_y,n_r,n_g,n_b,n_a);
cpx[0]=n_r;
cpx[1]=n_g;
cpx[2]=n_b;
px_x+=1.0;
ps_x+=pp->px2ps[0];
ps_y+=pp->px2ps[1];
cpx+=4;
}
px_y+=1.0;
lpx+=pb->rs;
}
}
} else {
ba.x0 = pb->area.x0;
ba.y0 = pb->area.y0;
ba.x1 = pb->area.x1;
ba.y1 = pb->area.y1;
// Trying to solve this bug: https://bugs.launchpad.net/inkscape/+bug/167416
// Bail out if the transformation matrix has extreme values. If we bail out
// however, then something (which was meaningless anyway) won't be rendered,
// which is better than getting stuck in a virtually infinite loop
if (fabs(pp->px2ps[0]) < 1e6 &&
fabs(pp->px2ps[3]) < 1e6 &&
fabs(pp->px2ps[4]) < 1e6 &&
fabs(pp->px2ps[5]) < 1e6)
{
// TODO: remove px2ps_nr after converting to 2geom
NR::Matrix px2ps_nr = from_2geom(pp->px2ps);
nr_rect_d_matrix_transform (&psa, &ba, &px2ps_nr);
psa.x0 = floor ((psa.x0 - pattern_x (pp->pat)) / pattern_width (pp->pat)) -1;
psa.y0 = floor ((psa.y0 - pattern_y (pp->pat)) / pattern_height (pp->pat)) -1;
psa.x1 = ceil ((psa.x1 - pattern_x (pp->pat)) / pattern_width (pp->pat)) +1;
psa.y1 = ceil ((psa.y1 - pattern_y (pp->pat)) / pattern_height (pp->pat)) +1;
// If psa is too wide or tall, then something must be wrong! This is due to
// nr_rect_d_matrix_transform (&psa, &ba, &pp->px2ps) using a weird transformation matrix pp->px2ps.
g_assert(std::abs(psa.x1 - psa.x0) < 1e6);
g_assert(std::abs(psa.y1 - psa.y0) < 1e6);
for (y = psa.y0; y < psa.y1; y++) {
for (x = psa.x0; x < psa.x1; x++) {
NRPixBlock ppb;
double psx, psy;
psx = x * pattern_width (pp->pat);
psy = y * pattern_height (pp->pat);
area.x0 = (gint32)(pb->area.x0 - (pp->ps2px[0] * psx + pp->ps2px[2] * psy));
area.y0 = (gint32)(pb->area.y0 - (pp->ps2px[1] * psx + pp->ps2px[3] * psy));
area.x1 = area.x0 + pb->area.x1 - pb->area.x0;
area.y1 = area.y0 + pb->area.y1 - pb->area.y0;
// We do not update here anymore
// Set up buffer
// fixme: (Lauris)
nr_pixblock_setup_extern (&ppb, pb->mode, area.x0, area.y0, area.x1, area.y1, NR_PIXBLOCK_PX (pb), pb->rs, FALSE, FALSE);
nr_arena_item_invoke_render (NULL, pp->root, &area, &ppb, 0);
nr_pixblock_release (&ppb);
}
}
}
}
}