1 /* === S Y N F I G ========================================================= */
2 /*! \file savecanvas.cpp
5 ** $Id: savecanvas.cpp,v 1.2 2005/01/07 03:29:12 darco Exp $
8 ** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
10 ** This package is free software; you can redistribute it and/or
11 ** modify it under the terms of the GNU General Public License as
12 ** published by the Free Software Foundation; either version 2 of
13 ** the License, or (at your option) any later version.
15 ** This package is distributed in the hope that it will be useful,
16 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 ** General Public License for more details.
21 /* ========================================================================= */
23 /* === H E A D E R S ======================================================= */
32 #ifdef HAVE_SYS_ERRNO_H
33 # include <sys/errno.h>
36 #include "savecanvas.h"
38 #include "valuenode.h"
39 #include "valuenode_subtract.h"
40 #include "valuenode_animated.h"
41 #include "valuenode_composite.h"
42 #include "valuenode_const.h"
43 #include "valuenode_linear.h"
44 #include "valuenode_dynamiclist.h"
45 #include "valuenode_reference.h"
46 #include "valuenode_segcalctangent.h"
47 #include "valuenode_segcalcvertex.h"
48 #include "valuenode_bline.h"
53 #include "paramdesc.h"
55 #include <libxml++/libxml++.h>
56 #include <ETL/stringf>
61 /* === U S I N G =========================================================== */
65 using namespace synfig;
67 /* === M A C R O S ========================================================= */
69 #define COLOR_VALUE_TYPE_FORMAT "%f"
70 #define VECTOR_VALUE_TYPE_FORMAT "%0.10f"
71 #define TIME_TYPE_FORMAT "%0.3f"
72 #define VIEW_BOX_FORMAT "%f %f %f %f"
74 /* === G L O B A L S ======================================================= */
76 /* === P R O C E D U R E S ================================================= */
78 xmlpp::Element* encode_canvas(xmlpp::Element* root,Canvas::ConstHandle canvas);
79 xmlpp::Element* encode_value_node(xmlpp::Element* root,ValueNode::ConstHandle value_node,Canvas::ConstHandle canvas);
81 xmlpp::Element* encode_keyframe(xmlpp::Element* root,const Keyframe &kf, float fps)
83 root->set_name("keyframe");
84 root->set_attribute("time",kf.get_time().get_string(fps));
85 if(!kf.get_description().empty())
86 root->set_child_text(kf.get_description());
91 xmlpp::Element* encode_real(xmlpp::Element* root,Real v)
93 root->set_name("real");
94 root->set_attribute("value",strprintf(VECTOR_VALUE_TYPE_FORMAT,v));
98 xmlpp::Element* encode_time(xmlpp::Element* root,Time t, float fps=0)
100 root->set_name("time");
101 //root->set_attribute("value",t.get_string(fps));
102 root->set_attribute("value",t.get_string());
106 xmlpp::Element* encode_integer(xmlpp::Element* root,int i)
108 root->set_name("integer");
109 root->set_attribute("value",strprintf("%i",i));
113 xmlpp::Element* encode_bool(xmlpp::Element* root,bool b)
115 root->set_name("bool");
116 root->set_attribute("value",b?"true":"false");
120 xmlpp::Element* encode_string(xmlpp::Element* root,const String &str)
122 root->set_name("string");
123 root->set_child_text(str);
127 xmlpp::Element* encode_vector(xmlpp::Element* root,Vector vect)
129 root->set_name("vector");
130 root->add_child("x")->set_child_text(strprintf(VECTOR_VALUE_TYPE_FORMAT,(float)vect[0]));
131 root->add_child("y")->set_child_text(strprintf(VECTOR_VALUE_TYPE_FORMAT,(float)vect[1]));
135 xmlpp::Element* encode_color(xmlpp::Element* root,Color color)
137 root->set_name("color");
138 root->add_child("r")->set_child_text(strprintf(COLOR_VALUE_TYPE_FORMAT,(float)color.get_r()));
139 root->add_child("g")->set_child_text(strprintf(COLOR_VALUE_TYPE_FORMAT,(float)color.get_g()));
140 root->add_child("b")->set_child_text(strprintf(COLOR_VALUE_TYPE_FORMAT,(float)color.get_b()));
141 root->add_child("a")->set_child_text(strprintf(COLOR_VALUE_TYPE_FORMAT,(float)color.get_a()));
145 xmlpp::Element* encode_angle(xmlpp::Element* root,Angle theta)
147 root->set_name("angle");
148 root->set_attribute("value",strprintf("%f",(float)Angle::deg(theta).get()));
152 xmlpp::Element* encode_segment(xmlpp::Element* root,Segment seg)
154 root->set_name("segment");
155 encode_vector(root->add_child("p1")->add_child("vector"),seg.p1);
156 encode_vector(root->add_child("t1")->add_child("vector"),seg.t1);
157 encode_vector(root->add_child("p2")->add_child("vector"),seg.p2);
158 encode_vector(root->add_child("t2")->add_child("vector"),seg.t2);
162 xmlpp::Element* encode_bline_point(xmlpp::Element* root,BLinePoint bline_point)
164 root->set_name(ValueBase::type_name(ValueBase::TYPE_BLINEPOINT));
166 encode_vector(root->add_child("vertex")->add_child("vector"),bline_point.get_vertex());
167 encode_vector(root->add_child("t1")->add_child("vector"),bline_point.get_tangent1());
169 if(bline_point.get_split_tangent_flag())
170 encode_vector(root->add_child("t2")->add_child("vector"),bline_point.get_tangent2());
172 encode_real(root->add_child("width")->add_child("real"),bline_point.get_width());
173 encode_real(root->add_child("origin")->add_child("real"),bline_point.get_origin());
177 xmlpp::Element* encode_gradient(xmlpp::Element* root,Gradient x)
179 root->set_name("gradient");
181 Gradient::const_iterator iter;
183 for(iter=x.begin();iter!=x.end();iter++)
185 xmlpp::Element *cpoint(encode_color(root->add_child("color"),iter->color));
186 cpoint->set_attribute("pos",strprintf("%f",iter->pos));
192 xmlpp::Element* encode_value(xmlpp::Element* root,const ValueBase &data,Canvas::ConstHandle canvas=0);
194 xmlpp::Element* encode_list(xmlpp::Element* root,std::list<ValueBase> list, Canvas::ConstHandle canvas=0)
196 root->set_name("list");
200 encode_value(root->add_child("value"),list.front(),canvas);
207 xmlpp::Element* encode_value(xmlpp::Element* root,const ValueBase &data,Canvas::ConstHandle canvas)
209 switch(data.get_type())
211 case ValueBase::TYPE_REAL:
212 return encode_real(root,data.get(Real()));
213 case ValueBase::TYPE_TIME:
215 return encode_time(root,data.get(Time()),canvas->rend_desc().get_frame_rate());
217 return encode_time(root,data.get(Time()));
218 case ValueBase::TYPE_INTEGER:
219 return encode_integer(root,data.get(int()));
220 case ValueBase::TYPE_COLOR:
221 return encode_color(root,data.get(Color()));
222 case ValueBase::TYPE_VECTOR:
223 return encode_vector(root,data.get(Vector()));
224 case ValueBase::TYPE_ANGLE:
225 return encode_angle(root,data.get(Angle()));
226 case ValueBase::TYPE_BOOL:
227 return encode_bool(root,data.get(bool()));
228 case ValueBase::TYPE_STRING:
229 return encode_string(root,data.get(String()));
230 case ValueBase::TYPE_SEGMENT:
231 return encode_segment(root,data.get(Segment()));
232 case ValueBase::TYPE_BLINEPOINT:
233 return encode_bline_point(root,data.get(BLinePoint()));
234 case ValueBase::TYPE_GRADIENT:
235 return encode_gradient(root,data.get(Gradient()));
236 case ValueBase::TYPE_LIST:
237 return encode_list(root,data,canvas);
238 case ValueBase::TYPE_CANVAS:
239 return encode_canvas(root,data.get(Canvas::Handle()).get());
240 case ValueBase::TYPE_NIL:
241 synfig::error("Encountered NIL ValueBase");
242 root->set_name("nil");
245 synfig::error(strprintf("Unknown value(%s), cannot create XML representation!",ValueBase::type_name(data.get_type()).c_str()));
246 root->set_name("nil");
251 xmlpp::Element* encode_animated(xmlpp::Element* root,ValueNode_Animated::ConstHandle value_node,Canvas::ConstHandle canvas=0)
254 root->set_name("animated");
256 root->set_attribute("type",ValueBase::type_name(value_node->get_type()));
258 const ValueNode_Animated::WaypointList &waypoint_list=value_node->waypoint_list();
259 ValueNode_Animated::WaypointList::const_iterator iter;
261 for(iter=waypoint_list.begin();iter!=waypoint_list.end();++iter)
263 xmlpp::Element *waypoint_node=root->add_child("waypoint");
264 //waypoint_node->set_attribute("time",iter->get_time().get_string(canvas->rend_desc().get_frame_rate()));
265 waypoint_node->set_attribute("time",iter->get_time().get_string());
267 //waypoint_node->add_child(encode_value(iter->get_value(),canvas));
268 if(iter->get_value_node()->is_exported())
269 waypoint_node->set_attribute("use",iter->get_value_node()->get_relative_id(canvas));
271 encode_value_node(waypoint_node->add_child("value_node"),iter->get_value_node(),canvas);
273 switch(iter->get_before())
275 case INTERPOLATION_HALT:
276 waypoint_node->set_attribute("before","halt");
278 case INTERPOLATION_LINEAR:
279 waypoint_node->set_attribute("before","linear");
281 case INTERPOLATION_MANUAL:
282 waypoint_node->set_attribute("before","manual");
284 case INTERPOLATION_CONSTANT:
285 waypoint_node->set_attribute("before","constant");
287 case INTERPOLATION_TCB:
288 // This is the default value, so don't add a new attribute
291 error("Unknown waypoint type for \"before\" attribute");
294 switch(iter->get_after())
296 case INTERPOLATION_HALT:
297 waypoint_node->set_attribute("after","halt");
299 case INTERPOLATION_LINEAR:
300 waypoint_node->set_attribute("after","linear");
302 case INTERPOLATION_MANUAL:
303 waypoint_node->set_attribute("after","manual");
305 case INTERPOLATION_CONSTANT:
306 waypoint_node->set_attribute("after","constant");
308 case INTERPOLATION_TCB:
309 // This is the default value, so don't add a new attribute
312 error("Unknown waypoint type for \"before\" attribute");
315 if(iter->get_tension()!=0.0)
316 waypoint_node->set_attribute("tension",strprintf("%f",iter->get_tension()));
317 if(iter->get_time_tension()!=0.0)
318 waypoint_node->set_attribute("temporal-tension",strprintf("%f",iter->get_time_tension()));
319 if(iter->get_continuity()!=0.0)
320 waypoint_node->set_attribute("continuity",strprintf("%f",iter->get_continuity()));
321 if(iter->get_bias()!=0.0)
322 waypoint_node->set_attribute("bias",strprintf("%f",iter->get_bias()));
329 xmlpp::Element* encode_composite(xmlpp::Element* root,ValueNode_Composite::ConstHandle value_node,Canvas::ConstHandle canvas=0)
332 root->set_name("composite");
334 root->set_attribute("type",ValueBase::type_name(value_node->get_type()));
337 for(i=0;i<value_node->link_count();i++)
339 string name(strprintf("c%d",i+1));
340 assert(value_node->get_link(i));
341 if(value_node->get_link(i)->is_exported())
342 root->set_attribute(name,value_node->get_link(i)->get_relative_id(canvas));
344 encode_value_node(root->add_child(name)->add_child("value_node"),value_node->get_link(i).constant(),canvas);
350 xmlpp::Element* encode_subtract(xmlpp::Element* root,ValueNode_Subtract::ConstHandle value_node,Canvas::ConstHandle canvas=0)
353 root->set_name("subtract");
355 ValueNode::ConstHandle lhs=value_node->get_lhs();
356 ValueNode::ConstHandle rhs=value_node->get_rhs();
357 ValueNode::ConstHandle scalar=value_node->get_scalar();
362 root->set_attribute("type",ValueBase::type_name(value_node->get_type()));
365 warning("LHS is equal to RHS, this <subtract> will always be zero!");
367 //if(value_node->get_scalar()!=1)
368 // root->set_attribute("scalar",strprintf(VECTOR_VALUE_TYPE_FORMAT,value_node->get_scalar()));
370 if(!scalar->get_id().empty())
371 root->set_attribute("scalar",scalar->get_relative_id(canvas));
373 encode_value_node(root->add_child("scalar")->add_child("value_node"),scalar,canvas);
375 if(!lhs->get_id().empty())
376 root->set_attribute("lhs",lhs->get_relative_id(canvas));
378 encode_value_node(root->add_child("lhs")->add_child("value_node"),lhs,canvas);
380 if(!rhs->get_id().empty())
381 root->set_attribute("rhs",rhs->get_relative_id(canvas));
383 encode_value_node(root->add_child("rhs")->add_child("value_node"),rhs,canvas);
388 xmlpp::Element* encode_dynamic_list(xmlpp::Element* root,ValueNode_DynamicList::ConstHandle value_node,Canvas::ConstHandle canvas=0)
391 // const float fps(canvas?canvas->rend_desc().get_frame_rate():0);
394 root->set_name(value_node->get_name());
396 root->set_attribute("type",ValueBase::type_name(value_node->get_contained_type()));
398 vector<ValueNode_DynamicList::ListEntry>::const_iterator iter;
400 ValueNode_BLine::ConstHandle bline_value_node(ValueNode_BLine::ConstHandle::cast_dynamic(value_node));
404 if(bline_value_node->get_loop())
405 root->set_attribute("loop","true");
407 root->set_attribute("loop","false");
410 for(iter=value_node->list.begin();iter!=value_node->list.end();++iter)
412 xmlpp::Element *entry_node=root->add_child("entry");
413 assert(iter->value_node);
414 if(!iter->value_node->get_id().empty())
415 entry_node->set_attribute("use",iter->value_node->get_relative_id(canvas));
417 encode_value_node(entry_node->add_child("value_node"),iter->value_node,canvas);
421 typedef synfig::ValueNode_DynamicList::ListEntry::Activepoint Activepoint;
422 typedef synfig::ValueNode_DynamicList::ListEntry::ActivepointList ActivepointList;
423 String begin_sequence;
426 const ActivepointList& timing_info(iter->timing_info);
427 ActivepointList::const_iterator entry_iter;
429 for(entry_iter=timing_info.begin();entry_iter!=timing_info.end();++entry_iter)
430 if(entry_iter->state==true)
432 if(entry_iter->priority)
433 begin_sequence+=strprintf("p%d ",entry_iter->priority);
434 begin_sequence+=entry_iter->time.get_string(fps)+", ";
438 if(entry_iter->priority)
439 end_sequence+=strprintf("p%d ",entry_iter->priority);
440 end_sequence+=entry_iter->time.get_string(fps)+", ";
443 // If this is just a plane-jane vanilla entry,
444 // then don't bother with begins and ends
445 if(end_sequence.empty() && begin_sequence=="SOT, ")
446 begin_sequence.clear();
448 if(!begin_sequence.empty())
450 // Remove the last ", " stuff
451 begin_sequence=String(begin_sequence.begin(),begin_sequence.end()-2);
453 entry_node->set_attribute("on",begin_sequence);
456 if(!end_sequence.empty())
458 // Remove the last ", " stuff
459 end_sequence=String(end_sequence.begin(),end_sequence.end()-2);
461 entry_node->set_attribute("off",end_sequence);
469 // Generic linkable data node entry
470 xmlpp::Element* encode_linkable_value_node(xmlpp::Element* root,LinkableValueNode::ConstHandle value_node,Canvas::ConstHandle canvas=0)
473 root->set_name(value_node->get_name());
475 root->set_attribute("type",ValueBase::type_name(value_node->get_type()));
478 for(i=0;i<value_node->link_count();i++)
480 ValueNode::ConstHandle link=value_node->get_link(i).constant();
482 throw runtime_error("Bad link");
483 if(link->is_exported())
484 root->set_attribute(value_node->link_name(i),link->get_relative_id(canvas));
486 encode_value_node(root->add_child(value_node->link_name(i))->add_child("value_node"),link,canvas);
492 xmlpp::Element* encode_value_node(xmlpp::Element* root,ValueNode::ConstHandle value_node,Canvas::ConstHandle canvas)
496 if(ValueNode_Animated::ConstHandle::cast_dynamic(value_node))
497 encode_animated(root,ValueNode_Animated::ConstHandle::cast_dynamic(value_node),canvas);
499 if(ValueNode_Composite::ConstHandle::cast_dynamic(value_node))
500 encode_composite(root,ValueNode_Composite::ConstHandle::cast_dynamic(value_node),canvas);
502 if(ValueNode_Subtract::ConstHandle::cast_dynamic(value_node))
503 encode_subtract(root,ValueNode_Subtract::ConstHandle::cast_dynamic(value_node),canvas);
505 if(ValueNode_DynamicList::ConstHandle::cast_dynamic(value_node))
506 encode_dynamic_list(root,ValueNode_DynamicList::ConstHandle::cast_dynamic(value_node),canvas);
507 else if(ValueNode_Const::ConstHandle::cast_dynamic(value_node))
509 encode_value(root,ValueNode_Const::ConstHandle::cast_dynamic(value_node)->get_value(),canvas);
512 if(LinkableValueNode::ConstHandle::cast_dynamic(value_node))
513 encode_linkable_value_node(root,LinkableValueNode::ConstHandle::cast_dynamic(value_node),canvas);
516 error(_("Unknown ValueNode Type (%s), cannot create an XML representation"),value_node->get_local_name().c_str());
517 root->set_name("nil");
522 if(!value_node->get_id().empty())
523 root->set_attribute("id",value_node->get_id());
525 if(value_node->rcount()>1)
526 root->set_attribute("guid",(value_node->get_guid()^canvas->get_root()->get_guid()).get_string());
531 xmlpp::Element* encode_layer(xmlpp::Element* root,Layer::ConstHandle layer)
533 root->set_name("layer");
535 root->set_attribute("type",layer->get_name());
536 root->set_attribute("active",layer->active()?"true":"false");
538 if(!layer->get_version().empty())
539 root->set_attribute("version",layer->get_version());
540 if(!layer->get_description().empty())
541 root->set_attribute("desc",layer->get_description());
542 if(!layer->get_group().empty())
543 root->set_attribute("group",layer->get_group());
545 Layer::Vocab vocab(layer->get_param_vocab());
546 Layer::Vocab::const_iterator iter;
548 const Layer::DynamicParamList &dynamic_param_list=layer->dynamic_param_list();
550 for(iter=vocab.begin();iter!=vocab.end();++iter)
552 // Handle dynamic parameters
553 if(dynamic_param_list.count(iter->get_name()))
555 xmlpp::Element *node=root->add_child("param");
556 node->set_attribute("name",iter->get_name());
558 handle<const ValueNode> value_node=dynamic_param_list.find(iter->get_name())->second;
560 // If the valuenode.has no ID, then it must be defined in-place
561 if(value_node->get_id().empty())
563 encode_value_node(node->add_child("value_node"),value_node,layer->get_canvas().constant());
567 node->set_attribute("use",value_node->get_relative_id(layer->get_canvas()));
570 else // Handle normal parameters
571 if(iter->get_critical())
573 ValueBase value=layer->get_param(iter->get_name());
574 if(!value.is_valid())
576 error("Layer doesn't know it's own vocabulary -- "+iter->get_name());
580 if(value.get_type()==ValueBase::TYPE_CANVAS && !value.get(Canvas::LooseHandle())->is_inline())
582 Canvas::Handle child(value.get(Canvas::LooseHandle()));
584 if(!value.get(Canvas::Handle()))
586 xmlpp::Element *node=root->add_child("param");
587 node->set_attribute("name",iter->get_name());
588 node->set_attribute("use",child->get_relative_id(layer->get_canvas()));
591 xmlpp::Element *node=root->add_child("param");
592 node->set_attribute("name",iter->get_name());
594 encode_value(node->add_child("value"),value,layer->get_canvas().constant());
602 xmlpp::Element* encode_canvas(xmlpp::Element* root,Canvas::ConstHandle canvas)
605 const RendDesc &rend_desc=canvas->rend_desc();
606 root->set_name("canvas");
608 if(canvas->is_root())
609 root->set_attribute("version","0.1");
611 if(!canvas->get_id().empty() && !canvas->is_root() && !canvas->is_inline())
612 root->set_attribute("id",canvas->get_id());
614 if(!canvas->parent() || canvas->parent()->rend_desc().get_w()!=canvas->rend_desc().get_w())
615 root->set_attribute("width",strprintf("%d",rend_desc.get_w()));
617 if(!canvas->parent() || canvas->parent()->rend_desc().get_h()!=canvas->rend_desc().get_h())
618 root->set_attribute("height",strprintf("%d",rend_desc.get_h()));
620 if(!canvas->parent() || canvas->parent()->rend_desc().get_x_res()!=canvas->rend_desc().get_x_res())
621 root->set_attribute("xres",strprintf("%f",rend_desc.get_x_res()));
623 if(!canvas->parent() || canvas->parent()->rend_desc().get_y_res()!=canvas->rend_desc().get_y_res())
624 root->set_attribute("yres",strprintf("%f",rend_desc.get_y_res()));
627 if(!canvas->parent() ||
628 canvas->parent()->rend_desc().get_tl()!=canvas->rend_desc().get_tl() ||
629 canvas->parent()->rend_desc().get_br()!=canvas->rend_desc().get_br())
630 root->set_attribute("view-box",strprintf(VIEW_BOX_FORMAT,
631 rend_desc.get_tl()[0],
632 rend_desc.get_tl()[1],
633 rend_desc.get_br()[0],
634 rend_desc.get_br()[1])
637 if(!canvas->parent() || canvas->parent()->rend_desc().get_antialias()!=canvas->rend_desc().get_antialias())
638 root->set_attribute("antialias",strprintf("%d",rend_desc.get_antialias()));
640 if(!canvas->parent())
641 root->set_attribute("fps",strprintf(TIME_TYPE_FORMAT,rend_desc.get_frame_rate()));
643 if(!canvas->parent() || canvas->parent()->rend_desc().get_time_start()!=canvas->rend_desc().get_time_start())
644 root->set_attribute("begin-time",rend_desc.get_time_start().get_string(rend_desc.get_frame_rate()));
646 if(!canvas->parent() || canvas->parent()->rend_desc().get_time_end()!=canvas->rend_desc().get_time_end())
647 root->set_attribute("end-time",rend_desc.get_time_end().get_string(rend_desc.get_frame_rate()));
649 if(!canvas->is_inline())
651 root->set_attribute("bgcolor",strprintf(VIEW_BOX_FORMAT,
652 rend_desc.get_bg_color().get_r(),
653 rend_desc.get_bg_color().get_g(),
654 rend_desc.get_bg_color().get_b(),
655 rend_desc.get_bg_color().get_a())
658 if(!canvas->get_name().empty())
659 root->add_child("name")->set_child_text(canvas->get_name());
660 if(!canvas->get_description().empty())
661 root->add_child("desc")->set_child_text(canvas->get_description());
662 if(!canvas->get_author().empty())
663 root->add_child("author")->set_child_text(canvas->get_description());
665 std::list<String> meta_keys(canvas->get_meta_data_keys());
666 while(!meta_keys.empty())
668 xmlpp::Element* meta_element(root->add_child("meta"));
669 meta_element->set_attribute("name",meta_keys.front());
670 meta_element->set_attribute("content",canvas->get_meta_data(meta_keys.front()));
671 meta_keys.pop_front();
673 for(KeyframeList::const_iterator iter=canvas->keyframe_list().begin();iter!=canvas->keyframe_list().end();++iter)
674 encode_keyframe(root->add_child("keyframe"),*iter,canvas->rend_desc().get_frame_rate());
677 // Output the <defs> section
678 if(!canvas->is_inline() && !canvas->value_node_list().empty() || !canvas->children().empty())
680 xmlpp::Element *node=root->add_child("defs");
681 const ValueNodeList &value_node_list(canvas->value_node_list());
683 for(ValueNodeList::const_iterator iter=value_node_list.begin();iter!=value_node_list.end();++iter)
685 // If the value_node is a constant, then use the shorthand
686 if(handle<ValueNode_Const>::cast_dynamic(*iter))
688 ValueNode_Const::Handle value_node(ValueNode_Const::Handle::cast_dynamic(*iter));
689 reinterpret_cast<xmlpp::Element*>(encode_value(node->add_child("value"),value_node->get_value()))->set_attribute("id",value_node->get_id());
692 encode_value_node(node->add_child("value_node"),*iter,canvas);
696 for(Canvas::Children::const_iterator iter=canvas->children().begin();iter!=canvas->children().end();++iter)
698 encode_canvas(node->add_child("canvas"),*iter);
702 Canvas::const_reverse_iterator iter;
704 for(iter=canvas->rbegin();iter!=canvas->rend();++iter)
705 encode_layer(root->add_child("layer"),*iter);
711 synfig::save_canvas(const String &filename, Canvas::ConstHandle canvas)
713 synfig::String tmp_filename(filename+".TMP");
718 xmlpp::Document document;
720 encode_canvas(document.create_root_node("canvas"),canvas);
722 document.write_to_file_formatted(tmp_filename);
724 catch(...) { synfig::error("synfig::save_canvas(): Caught unknown exception"); return false; }
728 // On Win32 platforms, rename() has bad behavior. work around it.
729 char old_file[80]="sif.XXXXXXXX";
731 rename(filename.c_str(),old_file);
732 if(rename(tmp_filename.c_str(),filename.c_str())!=0)
734 rename(old_file,tmp_filename.c_str());
735 synfig::error("synfig::save_canvas(): Unable to rename file to correct filename, errno=%d",errno);
740 if(rename(tmp_filename.c_str(),filename.c_str())!=0)
742 synfig::error("synfig::save_canvas(): Unable to rename file to correct filename, errno=%d",errno);
751 synfig::canvas_to_string(Canvas::ConstHandle canvas)
755 xmlpp::Document document;
757 encode_canvas(document.create_root_node("canvas"),canvas);
759 return document.write_to_string_formatted();