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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #include <svgio/svgreader/svgsvgnode.hxx>
21 : #include <drawinglayer/geometry/viewinformation2d.hxx>
22 : #include <drawinglayer/primitive2d/transformprimitive2d.hxx>
23 : #include <drawinglayer/primitive2d/maskprimitive2d.hxx>
24 : #include <basegfx/polygon/b2dpolygontools.hxx>
25 : #include <basegfx/polygon/b2dpolygon.hxx>
26 : #include <basegfx/matrix/b2dhommatrixtools.hxx>
27 : #include <drawinglayer/primitive2d/polygonprimitive2d.hxx>
28 : #include <drawinglayer/primitive2d/hiddengeometryprimitive2d.hxx>
29 :
30 : //////////////////////////////////////////////////////////////////////////////
31 :
32 : namespace svgio
33 : {
34 : namespace svgreader
35 : {
36 0 : SvgSvgNode::SvgSvgNode(
37 : SvgDocument& rDocument,
38 : SvgNode* pParent)
39 : : SvgNode(SVGTokenSvg, rDocument, pParent),
40 : maSvgStyleAttributes(*this),
41 : mpViewBox(0),
42 : maSvgAspectRatio(),
43 : maX(),
44 : maY(),
45 : maWidth(),
46 : maHeight(),
47 0 : maVersion()
48 : {
49 0 : if(!getParent())
50 : {
51 : // initial fill is black
52 0 : maSvgStyleAttributes.setFill(SvgPaint(basegfx::BColor(0.0, 0.0, 0.0), true, true));
53 : }
54 0 : }
55 :
56 0 : SvgSvgNode::~SvgSvgNode()
57 : {
58 0 : if(mpViewBox) delete mpViewBox;
59 0 : }
60 :
61 0 : const SvgStyleAttributes* SvgSvgNode::getSvgStyleAttributes() const
62 : {
63 0 : return &maSvgStyleAttributes;
64 : }
65 :
66 0 : void SvgSvgNode::parseAttribute(const rtl::OUString& rTokenName, SVGToken aSVGToken, const rtl::OUString& aContent)
67 : {
68 : // call parent
69 0 : SvgNode::parseAttribute(rTokenName, aSVGToken, aContent);
70 :
71 : // read style attributes
72 0 : maSvgStyleAttributes.parseStyleAttribute(rTokenName, aSVGToken, aContent);
73 :
74 : // parse own
75 0 : switch(aSVGToken)
76 : {
77 : case SVGTokenStyle:
78 : {
79 0 : maSvgStyleAttributes.readStyle(aContent);
80 0 : break;
81 : }
82 : case SVGTokenViewBox:
83 : {
84 0 : const basegfx::B2DRange aRange(readViewBox(aContent, *this));
85 :
86 0 : if(!aRange.isEmpty())
87 : {
88 0 : setViewBox(&aRange);
89 : }
90 : break;
91 : }
92 : case SVGTokenPreserveAspectRatio:
93 : {
94 0 : setSvgAspectRatio(readSvgAspectRatio(aContent));
95 0 : break;
96 : }
97 : case SVGTokenX:
98 : {
99 0 : SvgNumber aNum;
100 :
101 0 : if(readSingleNumber(aContent, aNum))
102 : {
103 0 : setX(aNum);
104 : }
105 : break;
106 : }
107 : case SVGTokenY:
108 : {
109 0 : SvgNumber aNum;
110 :
111 0 : if(readSingleNumber(aContent, aNum))
112 : {
113 0 : setY(aNum);
114 : }
115 : break;
116 : }
117 : case SVGTokenWidth:
118 : {
119 0 : SvgNumber aNum;
120 :
121 0 : if(readSingleNumber(aContent, aNum))
122 : {
123 0 : if(aNum.isPositive())
124 : {
125 0 : setWidth(aNum);
126 : }
127 : }
128 : break;
129 : }
130 : case SVGTokenHeight:
131 : {
132 0 : SvgNumber aNum;
133 :
134 0 : if(readSingleNumber(aContent, aNum))
135 : {
136 0 : if(aNum.isPositive())
137 : {
138 0 : setHeight(aNum);
139 : }
140 : }
141 : break;
142 : }
143 : case SVGTokenVersion:
144 : {
145 0 : SvgNumber aNum;
146 :
147 0 : if(readSingleNumber(aContent, aNum))
148 : {
149 0 : setVersion(aNum);
150 : }
151 : break;
152 : }
153 : default:
154 : {
155 0 : break;
156 : }
157 : }
158 0 : }
159 :
160 0 : void SvgSvgNode::decomposeSvgNode(drawinglayer::primitive2d::Primitive2DSequence& rTarget, bool bReferenced) const
161 : {
162 0 : drawinglayer::primitive2d::Primitive2DSequence aSequence;
163 :
164 : // decompose childs
165 0 : SvgNode::decomposeSvgNode(aSequence, bReferenced);
166 :
167 0 : if(aSequence.hasElements())
168 : {
169 0 : if(getParent())
170 : {
171 0 : if(getViewBox())
172 : {
173 : // Svg defines that with no width or no height the viewBox content is empty,
174 : // so both need to exist
175 0 : if(!basegfx::fTools::equalZero(getViewBox()->getWidth()) && !basegfx::fTools::equalZero(getViewBox()->getHeight()))
176 : {
177 : // create target range homing x,y, width and height as given
178 0 : const double fX(getX().isSet() ? getX().solve(*this, xcoordinate) : 0.0);
179 0 : const double fY(getY().isSet() ? getY().solve(*this, ycoordinate) : 0.0);
180 0 : const double fW(getWidth().isSet() ? getWidth().solve(*this, xcoordinate) : getViewBox()->getWidth());
181 0 : const double fH(getHeight().isSet() ? getHeight().solve(*this, ycoordinate) : getViewBox()->getHeight());
182 0 : const basegfx::B2DRange aTarget(fX, fY, fX + fW, fY + fH);
183 :
184 0 : if(aTarget.equal(*getViewBox()))
185 : {
186 : // no mapping needed, append
187 0 : drawinglayer::primitive2d::appendPrimitive2DSequenceToPrimitive2DSequence(rTarget, aSequence);
188 : }
189 : else
190 : {
191 : // create mapping
192 0 : const SvgAspectRatio& rRatio = getSvgAspectRatio();
193 :
194 0 : if(rRatio.isSet())
195 : {
196 : // let mapping be created from SvgAspectRatio
197 : const basegfx::B2DHomMatrix aEmbeddingTransform(
198 0 : rRatio.createMapping(aTarget, *getViewBox()));
199 :
200 : // prepare embedding in transformation
201 : const drawinglayer::primitive2d::Primitive2DReference xRef(
202 : new drawinglayer::primitive2d::TransformPrimitive2D(
203 : aEmbeddingTransform,
204 0 : aSequence));
205 :
206 0 : if(rRatio.isMeetOrSlice())
207 : {
208 : // embed in transformation
209 0 : drawinglayer::primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(rTarget, xRef);
210 : }
211 : else
212 : {
213 : // need to embed in MaskPrimitive2D, too
214 : const drawinglayer::primitive2d::Primitive2DReference xMask(
215 : new drawinglayer::primitive2d::MaskPrimitive2D(
216 : basegfx::B2DPolyPolygon(basegfx::tools::createPolygonFromRect(aTarget)),
217 0 : drawinglayer::primitive2d::Primitive2DSequence(&xRef, 1)));
218 :
219 0 : drawinglayer::primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(rTarget, xMask);
220 0 : }
221 : }
222 : else
223 : {
224 : // choose default mapping
225 : const basegfx::B2DHomMatrix aEmbeddingTransform(
226 : rRatio.createLinearMapping(
227 0 : aTarget, *getViewBox()));
228 :
229 : // embed in transformation
230 : const drawinglayer::primitive2d::Primitive2DReference xTransform(
231 : new drawinglayer::primitive2d::TransformPrimitive2D(
232 : aEmbeddingTransform,
233 0 : aSequence));
234 :
235 0 : drawinglayer::primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(rTarget, xTransform);
236 : }
237 : }
238 : }
239 : }
240 : else
241 : {
242 : // check if we have a size
243 0 : const double fW(getWidth().isSet() ? getWidth().solve(*this, xcoordinate) : 0.0);
244 0 : const double fH(getHeight().isSet() ? getHeight().solve(*this, ycoordinate) : 0.0);
245 :
246 : // Svg defines that a negative value is an error and that 0.0 disables rendering
247 0 : if(basegfx::fTools::more(fW, 0.0) && basegfx::fTools::more(fH, 0.0))
248 : {
249 : // check if we have a x,y position
250 0 : const double fX(getX().isSet() ? getX().solve(*this, xcoordinate) : 0.0);
251 0 : const double fY(getY().isSet() ? getY().solve(*this, ycoordinate) : 0.0);
252 :
253 0 : if(!basegfx::fTools::equalZero(fX) || !basegfx::fTools::equalZero(fY))
254 : {
255 : // embed in transform
256 : const drawinglayer::primitive2d::Primitive2DReference xRef(
257 : new drawinglayer::primitive2d::TransformPrimitive2D(
258 : basegfx::tools::createTranslateB2DHomMatrix(fX, fY),
259 0 : aSequence));
260 :
261 0 : aSequence = drawinglayer::primitive2d::Primitive2DSequence(&xRef, 1);
262 : }
263 :
264 : // embed in MaskPrimitive2D to clip
265 : const drawinglayer::primitive2d::Primitive2DReference xMask(
266 : new drawinglayer::primitive2d::MaskPrimitive2D(
267 : basegfx::B2DPolyPolygon(
268 : basegfx::tools::createPolygonFromRect(
269 : basegfx::B2DRange(fX, fY, fX + fW, fY + fH))),
270 0 : aSequence));
271 :
272 : // append
273 0 : drawinglayer::primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(rTarget, xMask);
274 : }
275 : }
276 : }
277 : else
278 : {
279 : // Outermost SVG element; create target range homing width and height as given.
280 : // SVG defines that x,y has no meanig for the outermost SVG element. Use a fallback
281 : // width and height of din A 4 (21 x 29,7 cm)
282 0 : double fW(getWidth().isSet() ? getWidth().solve(*this, xcoordinate) : (210.0 * 3.543307));
283 0 : double fH(getHeight().isSet() ? getHeight().solve(*this, ycoordinate) : (297.0 * 3.543307));
284 :
285 : // Svg defines that a negative value is an error and that 0.0 disables rendering
286 0 : if(basegfx::fTools::more(fW, 0.0) && basegfx::fTools::more(fH, 0.0))
287 : {
288 0 : const basegfx::B2DRange aSvgCanvasRange(0.0, 0.0, fW, fH);
289 :
290 0 : if(getViewBox())
291 : {
292 0 : if(!basegfx::fTools::equalZero(getViewBox()->getWidth()) && !basegfx::fTools::equalZero(getViewBox()->getHeight()))
293 : {
294 : // create mapping
295 0 : const SvgAspectRatio& rRatio = getSvgAspectRatio();
296 0 : basegfx::B2DHomMatrix aViewBoxMapping;
297 :
298 0 : if(rRatio.isSet())
299 : {
300 : // let mapping be created from SvgAspectRatio
301 0 : aViewBoxMapping = rRatio.createMapping(aSvgCanvasRange, *getViewBox());
302 :
303 : // no need to check ratio here for slice, the outermost Svg will
304 : // be clipped anyways (see below)
305 : }
306 : else
307 : {
308 : // choose default mapping
309 0 : aViewBoxMapping = rRatio.createLinearMapping(aSvgCanvasRange, *getViewBox());
310 : }
311 :
312 : // scale content to viewBox definitions
313 : const drawinglayer::primitive2d::Primitive2DReference xTransform(
314 : new drawinglayer::primitive2d::TransformPrimitive2D(
315 : aViewBoxMapping,
316 0 : aSequence));
317 :
318 0 : aSequence = drawinglayer::primitive2d::Primitive2DSequence(&xTransform, 1);
319 : }
320 : }
321 :
322 : // to be completely correct in Svg sense it is necessary to clip
323 : // the whole content to the given canvas. I choose here to do this
324 : // initially despite I found various examples of Svg files out there
325 : // which have no correct values for this clipping. It's correct
326 : // due to the Svg spec.
327 0 : bool bDoCorrectCanvasClipping(true);
328 :
329 0 : if(bDoCorrectCanvasClipping)
330 : {
331 : // different from Svg we have the possibility with primitives to get
332 : // a correct bounding box for the geometry. Get it for evtl. taking action
333 : const basegfx::B2DRange aContentRange(
334 : drawinglayer::primitive2d::getB2DRangeFromPrimitive2DSequence(
335 : aSequence,
336 0 : drawinglayer::geometry::ViewInformation2D()));
337 :
338 0 : if(aSvgCanvasRange.isInside(aContentRange))
339 : {
340 : // no clip needed, but an invisible HiddenGeometryPrimitive2D
341 : // to allow getting the full Svg range using the primitive mechanisms.
342 : // This is needed since e.g. an SdrObject using this as graphic will
343 : // create a mapping transformation to exactly map the content to it's
344 : // real life size
345 : const drawinglayer::primitive2d::Primitive2DReference xLine(
346 : new drawinglayer::primitive2d::PolygonHairlinePrimitive2D(
347 : basegfx::tools::createPolygonFromRect(
348 : aSvgCanvasRange),
349 0 : basegfx::BColor(0.0, 0.0, 0.0)));
350 : const drawinglayer::primitive2d::Primitive2DReference xHidden(
351 : new drawinglayer::primitive2d::HiddenGeometryPrimitive2D(
352 0 : drawinglayer::primitive2d::Primitive2DSequence(&xLine, 1)));
353 :
354 0 : drawinglayer::primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(aSequence, xHidden);
355 : }
356 0 : else if(aSvgCanvasRange.overlaps(aContentRange))
357 : {
358 : // Clip is necessary. This will make Svg images evtl. smaller
359 : // than wanted from Svg (the free space which may be around it is
360 : // conform to the Svg spec), but avoids an expensive and unneccessary
361 : // clip. Keep the full Svg range here to get the correct mappings
362 : // to objects using this. Optimizations can be done in the processors
363 : const drawinglayer::primitive2d::Primitive2DReference xMask(
364 : new drawinglayer::primitive2d::MaskPrimitive2D(
365 : basegfx::B2DPolyPolygon(
366 : basegfx::tools::createPolygonFromRect(
367 : aSvgCanvasRange)),
368 0 : aSequence));
369 :
370 0 : aSequence = drawinglayer::primitive2d::Primitive2DSequence(&xMask, 1);
371 : }
372 : else
373 : {
374 : // not inside, no overlap. Empty Svg
375 0 : aSequence.realloc(0);
376 : }
377 : }
378 :
379 0 : if(aSequence.hasElements())
380 : {
381 : // embed in transform primitive to scale to 1/100th mm
382 : // where 1 mm == 3.543307 px to get from Svg coordinates to
383 : // drawinglayer ones
384 0 : const double fScaleTo100thmm(100.0 / 3.543307);
385 : const basegfx::B2DHomMatrix aTransform(
386 : basegfx::tools::createScaleB2DHomMatrix(
387 : fScaleTo100thmm,
388 0 : fScaleTo100thmm));
389 :
390 : const drawinglayer::primitive2d::Primitive2DReference xTransform(
391 : new drawinglayer::primitive2d::TransformPrimitive2D(
392 : aTransform,
393 0 : aSequence));
394 :
395 0 : aSequence = drawinglayer::primitive2d::Primitive2DSequence(&xTransform, 1);
396 :
397 : // append to result
398 0 : drawinglayer::primitive2d::appendPrimitive2DSequenceToPrimitive2DSequence(rTarget, aSequence);
399 : }
400 : }
401 : }
402 0 : }
403 0 : }
404 :
405 0 : const basegfx::B2DRange* SvgSvgNode::getCurrentViewPort() const
406 : {
407 0 : if(getViewBox())
408 : {
409 0 : return getViewBox();
410 : }
411 : else
412 : {
413 0 : return SvgNode::getCurrentViewPort();
414 : }
415 : }
416 :
417 : } // end of namespace svgreader
418 : } // end of namespace svgio
419 :
420 : //////////////////////////////////////////////////////////////////////////////
421 : // eof
422 :
423 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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