1 #define __SP_GRADIENT_CHEMISTRY_C__
3 /*
4 * Various utility methods for gradients
5 *
6 * Authors:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 * bulia byak
9 * Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
10 *
11 * Copyright (C) 2007 Johan Engelen
12 * Copyright (C) 2001-2005 authors
13 * Copyright (C) 2001 Ximian, Inc.
14 *
15 * Released under GNU GPL, read the file 'COPYING' for more information
16 */
19 #include "style.h"
20 #include "document-private.h"
21 #include "desktop-style.h"
23 #include "sp-gradient-reference.h"
24 #include "sp-gradient-vector.h"
25 #include "sp-linear-gradient.h"
26 #include "sp-radial-gradient.h"
27 #include "sp-stop.h"
28 #include "widgets/gradient-vector.h"
30 #include "sp-text.h"
31 #include "sp-tspan.h"
32 #include <libnr/nr-matrix-fns.h>
33 #include "xml/repr.h"
34 #include "svg/svg.h"
35 #include "svg/svg-color.h"
38 // Terminology:
39 //
40 // "vector" is a gradient that has stops but not position coords. It can be referenced by one or
41 // more privates. Objects should not refer to it directly. It has no radial/linear distinction.
42 //
43 // "private" is a gradient that has no stops but has position coords (e.g. center, radius etc for a
44 // radial). It references a vector for the actual colors. Each private is only used by one
45 // object. It is either linear or radial.
47 static void sp_gradient_repr_set_link(Inkscape::XML::Node *repr, SPGradient *gr);
49 SPGradient *
50 sp_gradient_ensure_vector_normalized(SPGradient *gr)
51 {
52 g_return_val_if_fail(gr != NULL, NULL);
53 g_return_val_if_fail(SP_IS_GRADIENT(gr), NULL);
55 /* If we are already normalized vector, just return */
56 if (gr->state == SP_GRADIENT_STATE_VECTOR) return gr;
57 /* Fail, if we have wrong state set */
58 if (gr->state != SP_GRADIENT_STATE_UNKNOWN) {
59 g_warning("file %s: line %d: Cannot normalize private gradient to vector (%s)", __FILE__, __LINE__, SP_OBJECT_ID(gr));
60 return NULL;
61 }
63 /* First make sure we have vector directly defined (i.e. gr has its own stops) */
64 if (!gr->has_stops) {
65 /* We do not have stops ourselves, so flatten stops as well */
66 sp_gradient_ensure_vector(gr);
67 g_assert(gr->vector.built);
68 // this adds stops from gr->vector as children to gr
69 sp_gradient_repr_write_vector (gr);
70 }
72 /* If gr hrefs some other gradient, remove the href */
73 if (gr->ref->getObject()) {
74 /* We are hrefing someone, so require flattening */
75 SP_OBJECT(gr)->updateRepr(((SPObject *) gr)->repr, SP_OBJECT_WRITE_EXT | SP_OBJECT_WRITE_ALL);
76 sp_gradient_repr_set_link(SP_OBJECT_REPR(gr), NULL);
77 }
79 /* Everything is OK, set state flag */
80 gr->state = SP_GRADIENT_STATE_VECTOR;
81 return gr;
82 }
84 /**
85 * Creates new private gradient for the given vector
86 */
88 static SPGradient *
89 sp_gradient_get_private_normalized(SPDocument *document, SPGradient *vector, SPGradientType type)
90 {
91 g_return_val_if_fail(document != NULL, NULL);
92 g_return_val_if_fail(vector != NULL, NULL);
93 g_return_val_if_fail(SP_IS_GRADIENT(vector), NULL);
94 g_return_val_if_fail(SP_GRADIENT_HAS_STOPS(vector), NULL);
96 SPDefs *defs = (SPDefs *) SP_DOCUMENT_DEFS(document);
98 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(document);
99 // create a new private gradient of the requested type
100 Inkscape::XML::Node *repr;
101 if (type == SP_GRADIENT_TYPE_LINEAR) {
102 repr = xml_doc->createElement("svg:linearGradient");
103 } else {
104 repr = xml_doc->createElement("svg:radialGradient");
105 }
107 // privates are garbage-collectable
108 repr->setAttribute("inkscape:collect", "always");
110 // link to vector
111 sp_gradient_repr_set_link(repr, vector);
113 /* Append the new private gradient to defs */
114 SP_OBJECT_REPR(defs)->appendChild(repr);
115 Inkscape::GC::release(repr);
117 // get corresponding object
118 SPGradient *gr = (SPGradient *) document->getObjectByRepr(repr);
119 g_assert(gr != NULL);
120 g_assert(SP_IS_GRADIENT(gr));
122 return gr;
123 }
125 /**
126 Count how many times gr is used by the styles of o and its descendants
127 */
128 guint
129 count_gradient_hrefs(SPObject *o, SPGradient *gr)
130 {
131 if (!o)
132 return 1;
134 guint i = 0;
136 SPStyle *style = SP_OBJECT_STYLE(o);
137 if (style
138 && style->fill.type == SP_PAINT_TYPE_PAINTSERVER
139 && SP_IS_GRADIENT(SP_STYLE_FILL_SERVER(style))
140 && SP_GRADIENT(SP_STYLE_FILL_SERVER(style)) == gr)
141 {
142 i ++;
143 }
144 if (style
145 && style->stroke.type == SP_PAINT_TYPE_PAINTSERVER
146 && SP_IS_GRADIENT(SP_STYLE_STROKE_SERVER(style))
147 && SP_GRADIENT(SP_STYLE_STROKE_SERVER(style)) == gr)
148 {
149 i ++;
150 }
152 for (SPObject *child = sp_object_first_child(o);
153 child != NULL; child = SP_OBJECT_NEXT(child)) {
154 i += count_gradient_hrefs(child, gr);
155 }
157 return i;
158 }
161 /**
162 * If gr has other users, create a new private; also check if gr links to vector, relink if not
163 */
164 SPGradient *
165 sp_gradient_fork_private_if_necessary(SPGradient *gr, SPGradient *vector,
166 SPGradientType type, SPObject *o)
167 {
168 g_return_val_if_fail(gr != NULL, NULL);
169 g_return_val_if_fail(SP_IS_GRADIENT(gr), NULL);
171 // Orphaned gradient, no vector with stops at the end of the line; this used to be an assert
172 // but i think we should not abort on this - maybe just write a validity warning into some sort
173 // of log
174 if (!vector || !SP_GRADIENT_HAS_STOPS(vector))
175 return (gr);
177 // user is the object that uses this gradient; normally it's item but for tspans, we
178 // check its ancestor text so that tspans don't get different gradients from their
179 // texts.
180 SPObject *user = o;
181 while (SP_IS_TSPAN(user)) {
182 user = SP_OBJECT_PARENT(user);
183 }
185 // Check the number of uses of the gradient within this object;
186 // if we are private and there are no other users,
187 if (SP_OBJECT_HREFCOUNT(gr) <= count_gradient_hrefs(user, gr)) {
188 // check vector
189 if ( gr != vector && gr->ref->getObject() != vector ) {
190 /* our href is not the vector, and vector is different from gr; relink */
191 sp_gradient_repr_set_link(SP_OBJECT_REPR(gr), vector);
192 }
193 return gr;
194 }
196 SPDocument *doc = SP_OBJECT_DOCUMENT(gr);
197 SPObject *defs = SP_DOCUMENT_DEFS(doc);
199 if ((gr->has_stops) ||
200 (gr->state != SP_GRADIENT_STATE_UNKNOWN) ||
201 (SP_OBJECT_PARENT(gr) != SP_OBJECT(defs)) ||
202 (SP_OBJECT_HREFCOUNT(gr) > 1)) {
203 // we have to clone a fresh new private gradient for the given vector
205 // create an empty one
206 SPGradient *gr_new = sp_gradient_get_private_normalized(doc, vector, type);
208 // copy all the attributes to it
209 Inkscape::XML::Node *repr_new = SP_OBJECT_REPR(gr_new);
210 Inkscape::XML::Node *repr = SP_OBJECT_REPR(gr);
211 repr_new->setAttribute("gradientUnits", repr->attribute("gradientUnits"));
212 repr_new->setAttribute("gradientTransform", repr->attribute("gradientTransform"));
213 repr_new->setAttribute("spreadMethod", repr->attribute("spreadMethod"));
214 if (SP_IS_RADIALGRADIENT(gr)) {
215 repr_new->setAttribute("cx", repr->attribute("cx"));
216 repr_new->setAttribute("cy", repr->attribute("cy"));
217 repr_new->setAttribute("fx", repr->attribute("fx"));
218 repr_new->setAttribute("fy", repr->attribute("fy"));
219 repr_new->setAttribute("r", repr->attribute("r"));
220 } else {
221 repr_new->setAttribute("x1", repr->attribute("x1"));
222 repr_new->setAttribute("y1", repr->attribute("y1"));
223 repr_new->setAttribute("x2", repr->attribute("x2"));
224 repr_new->setAttribute("y2", repr->attribute("y2"));
225 }
227 return gr_new;
228 } else {
229 return gr;
230 }
231 }
233 SPGradient *
234 sp_gradient_fork_vector_if_necessary (SPGradient *gr)
235 {
236 if (SP_OBJECT_HREFCOUNT(gr) > 1) {
237 SPDocument *document = SP_OBJECT_DOCUMENT(gr);
239 Inkscape::XML::Node *repr = SP_OBJECT_REPR (gr)->duplicate();
240 SP_OBJECT_REPR (SP_DOCUMENT_DEFS (document))->addChild(repr, NULL);
241 SPGradient *gr_new = (SPGradient *) document->getObjectByRepr(repr);
242 gr_new = sp_gradient_ensure_vector_normalized (gr_new);
243 Inkscape::GC::release(repr);
244 return gr_new;
245 }
246 return gr;
247 }
249 /**
250 * Convert an item's gradient to userspace _without_ preserving coords, setting them to defaults
251 * instead. No forking or reapplying is done because this is only called for newly created privates.
252 * @return The new gradient.
253 */
254 SPGradient *
255 sp_gradient_reset_to_userspace (SPGradient *gr, SPItem *item)
256 {
257 Inkscape::XML::Node *repr = SP_OBJECT_REPR(gr);
259 // calculate the bbox of the item
260 sp_document_ensure_up_to_date(SP_OBJECT_DOCUMENT(item));
261 NR::Maybe<NR::Rect> bbox = item->getBounds(NR::identity()); // we need "true" bbox without item_i2d_affine
263 g_assert( bbox );
264 NR::Coord const width = bbox->dimensions()[NR::X];
265 NR::Coord const height = bbox->dimensions()[NR::Y];
267 NR::Point const center = bbox->midpoint();
269 if (SP_IS_RADIALGRADIENT(gr)) {
270 sp_repr_set_svg_double(repr, "cx", center[NR::X]);
271 sp_repr_set_svg_double(repr, "cy", center[NR::Y]);
272 sp_repr_set_svg_double(repr, "fx", center[NR::X]);
273 sp_repr_set_svg_double(repr, "fy", center[NR::Y]);
274 sp_repr_set_svg_double(repr, "r", width/2);
276 // we want it to be elliptic, not circular
277 NR::Matrix squeeze = NR::Matrix (NR::translate (-center)) *
278 NR::Matrix (NR::scale(1, height/width)) *
279 NR::Matrix (NR::translate (center));
281 gr->gradientTransform = squeeze;
282 {
283 gchar *c=sp_svg_transform_write(gr->gradientTransform);
284 SP_OBJECT_REPR(gr)->setAttribute("gradientTransform", c);
285 g_free(c);
286 }
287 } else {
288 sp_repr_set_svg_double(repr, "x1", (center - NR::Point(width/2, 0))[NR::X]);
289 sp_repr_set_svg_double(repr, "y1", (center - NR::Point(width/2, 0))[NR::Y]);
290 sp_repr_set_svg_double(repr, "x2", (center + NR::Point(width/2, 0))[NR::X]);
291 sp_repr_set_svg_double(repr, "y2", (center + NR::Point(width/2, 0))[NR::Y]);
292 }
294 // set the gradientUnits
295 repr->setAttribute("gradientUnits", "userSpaceOnUse");
297 return gr;
298 }
300 /**
301 * Convert an item's gradient to userspace if necessary, also fork it if necessary.
302 * @return The new gradient.
303 */
304 SPGradient *
305 sp_gradient_convert_to_userspace(SPGradient *gr, SPItem *item, gchar const *property)
306 {
307 g_return_val_if_fail(SP_IS_GRADIENT(gr), NULL);
309 // First, fork it if it is shared
310 gr = sp_gradient_fork_private_if_necessary(gr, sp_gradient_get_vector(gr, FALSE),
311 SP_IS_RADIALGRADIENT(gr) ? SP_GRADIENT_TYPE_RADIAL : SP_GRADIENT_TYPE_LINEAR, SP_OBJECT(item));
313 if (gr->units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX) {
315 Inkscape::XML::Node *repr = SP_OBJECT_REPR(gr);
317 // calculate the bbox of the item
318 sp_document_ensure_up_to_date(SP_OBJECT_DOCUMENT(item));
319 NR::Matrix bbox2user;
320 NR::Maybe<NR::Rect> bbox = item->getBounds(NR::identity()); // we need "true" bbox without item_i2d_affine
321 if ( bbox ) {
322 bbox2user = NR::Matrix(bbox->dimensions()[NR::X], 0,
323 0, bbox->dimensions()[NR::Y],
324 bbox->min()[NR::X], bbox->min()[NR::Y]);
325 } else {
326 // would be degenerate otherwise
327 bbox2user = NR::identity();
328 }
330 /* skew is the additional transform, defined by the proportions of the item, that we need
331 * to apply to the gradient in order to work around this weird bit from SVG 1.1
332 * (http://www.w3.org/TR/SVG11/pservers.html#LinearGradients):
333 *
334 * When gradientUnits="objectBoundingBox" and gradientTransform is the identity
335 * matrix, the stripes of the linear gradient are perpendicular to the gradient
336 * vector in object bounding box space (i.e., the abstract coordinate system where
337 * (0,0) is at the top/left of the object bounding box and (1,1) is at the
338 * bottom/right of the object bounding box). When the object's bounding box is not
339 * square, the stripes that are conceptually perpendicular to the gradient vector
340 * within object bounding box space will render non-perpendicular relative to the
341 * gradient vector in user space due to application of the non-uniform scaling
342 * transformation from bounding box space to user space.
343 */
344 NR::Matrix skew = bbox2user;
345 double exp = skew.expansion();
346 skew[0] /= exp;
347 skew[1] /= exp;
348 skew[2] /= exp;
349 skew[3] /= exp;
350 skew[4] = 0;
351 skew[5] = 0;
353 // apply skew to the gradient
354 gr->gradientTransform = skew;
355 {
356 gchar *c=sp_svg_transform_write(gr->gradientTransform);
357 SP_OBJECT_REPR(gr)->setAttribute("gradientTransform", c);
358 g_free(c);
359 }
361 // Matrix to convert points to userspace coords; postmultiply by inverse of skew so
362 // as to cancel it out when it's applied to the gradient during rendering
363 NR::Matrix point_convert = bbox2user * skew.inverse();
365 if (SP_IS_RADIALGRADIENT(gr)) {
366 SPRadialGradient *rg = SP_RADIALGRADIENT(gr);
368 // original points in the bbox coords
369 NR::Point c_b = NR::Point(rg->cx.computed, rg->cy.computed);
370 NR::Point f_b = NR::Point(rg->fx.computed, rg->fy.computed);
371 double r_b = rg->r.computed;
373 // converted points in userspace coords
374 NR::Point c_u = c_b * point_convert;
375 NR::Point f_u = f_b * point_convert;
376 double r_u = r_b * point_convert.expansion();
378 sp_repr_set_svg_double(repr, "cx", c_u[NR::X]);
379 sp_repr_set_svg_double(repr, "cy", c_u[NR::Y]);
380 sp_repr_set_svg_double(repr, "fx", f_u[NR::X]);
381 sp_repr_set_svg_double(repr, "fy", f_u[NR::Y]);
382 sp_repr_set_svg_double(repr, "r", r_u);
384 } else {
385 SPLinearGradient *lg = SP_LINEARGRADIENT(gr);
387 NR::Point p1_b = NR::Point(lg->x1.computed, lg->y1.computed);
388 NR::Point p2_b = NR::Point(lg->x2.computed, lg->y2.computed);
390 NR::Point p1_u = p1_b * point_convert;
391 NR::Point p2_u = p2_b * point_convert;
393 sp_repr_set_svg_double(repr, "x1", p1_u[NR::X]);
394 sp_repr_set_svg_double(repr, "y1", p1_u[NR::Y]);
395 sp_repr_set_svg_double(repr, "x2", p2_u[NR::X]);
396 sp_repr_set_svg_double(repr, "y2", p2_u[NR::Y]);
397 }
399 // set the gradientUnits
400 repr->setAttribute("gradientUnits", "userSpaceOnUse");
401 }
403 // apply the gradient to the item (may be necessary if we forked it); not recursive
404 // generally because grouped items will be taken care of later (we're being called
405 // from sp_item_adjust_paint_recursive); however text and all its children should all
406 // refer to one gradient, hence the recursive call for text (because we can't/don't
407 // want to access tspans and set gradients on them separately)
408 if (SP_IS_TEXT(item))
409 sp_style_set_property_url(SP_OBJECT(item), property, SP_OBJECT(gr), true);
410 else
411 sp_style_set_property_url(SP_OBJECT(item), property, SP_OBJECT(gr), false);
413 return gr;
414 }
416 void
417 sp_gradient_transform_multiply(SPGradient *gradient, NR::Matrix postmul, bool set)
418 {
419 if (set) {
420 gradient->gradientTransform = postmul;
421 } else {
422 gradient->gradientTransform *= postmul; // fixme: get gradient transform by climbing to hrefs?
423 }
424 gradient->gradientTransform_set = TRUE;
426 gchar *c=sp_svg_transform_write(gradient->gradientTransform);
427 SP_OBJECT_REPR(gradient)->setAttribute("gradientTransform", c);
428 g_free(c);
429 }
431 SPGradient *
432 sp_item_gradient (SPItem *item, bool fill_or_stroke)
433 {
434 SPStyle *style = SP_OBJECT_STYLE (item);
435 SPGradient *gradient = NULL;
437 if (fill_or_stroke) {
438 if (style && (style->fill.type == SP_PAINT_TYPE_PAINTSERVER)) {
439 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER(item);
440 if (SP_IS_GRADIENT (server)) {
441 gradient = SP_GRADIENT (server);
442 }
443 }
444 } else {
445 if (style && (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)) {
446 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER(item);
447 if (SP_IS_GRADIENT (server)) {
448 gradient = SP_GRADIENT (server);
449 }
450 }
451 }
453 return gradient;
454 }
457 SPStop*
458 sp_first_stop(SPGradient *gradient)
459 {
460 for (SPObject *ochild = sp_object_first_child(gradient); ochild != NULL; ochild = SP_OBJECT_NEXT(ochild)) {
461 if (SP_IS_STOP (ochild))
462 return SP_STOP(ochild);
463 }
464 return NULL;
465 }
467 SPStop*
468 sp_prev_stop(SPStop *stop, SPGradient *gradient)
469 {
470 if (sp_object_first_child(SP_OBJECT(gradient)) == SP_OBJECT(stop))
471 return NULL;
472 SPObject *found = NULL;
473 for ( SPObject *ochild = sp_object_first_child(SP_OBJECT(gradient)) ; ochild != NULL ; ochild = SP_OBJECT_NEXT(ochild) ) {
474 if (SP_IS_STOP (ochild)) {
475 found = ochild;
476 }
477 if (SP_OBJECT_NEXT(ochild) == SP_OBJECT(stop) || SP_OBJECT(ochild) == SP_OBJECT(stop)) {
478 break;
479 }
480 }
481 return SP_STOP(found);
482 }
484 SPStop*
485 sp_next_stop(SPStop *stop)
486 {
487 for (SPObject *ochild = SP_OBJECT_NEXT(stop); ochild != NULL; ochild = SP_OBJECT_NEXT(ochild)) {
488 if (SP_IS_STOP (ochild))
489 return SP_STOP(ochild);
490 }
491 return NULL;
492 }
494 SPStop*
495 sp_last_stop(SPGradient *gradient)
496 {
497 for (SPStop *stop = sp_first_stop (gradient); stop != NULL; stop = sp_next_stop (stop)) {
498 if (sp_next_stop (stop) == NULL)
499 return stop;
500 }
501 return NULL;
502 }
504 SPStop*
505 sp_get_stop_i(SPGradient *gradient, guint stop_i)
506 {
507 SPStop *stop = sp_first_stop (gradient);
509 for (guint i=0; i < stop_i; i++) {
510 if (!stop) return NULL;
511 stop = sp_next_stop (stop);
512 }
514 return stop;
515 }
518 void
519 sp_item_gradient_edit_stop (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
520 {
521 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
523 if (!gradient || !SP_IS_GRADIENT(gradient))
524 return;
526 SPGradient *vector = sp_gradient_get_vector (gradient, false);
527 switch (point_type) {
528 case POINT_LG_BEGIN:
529 case POINT_RG_CENTER:
530 case POINT_RG_FOCUS:
531 {
532 GtkWidget *dialog = sp_gradient_vector_editor_new (vector, sp_first_stop (vector));
533 gtk_widget_show (dialog);
534 }
535 break;
537 case POINT_LG_END:
538 case POINT_RG_R1:
539 case POINT_RG_R2:
540 {
541 GtkWidget *dialog = sp_gradient_vector_editor_new (vector, sp_last_stop (vector));
542 gtk_widget_show (dialog);
543 }
544 break;
546 case POINT_LG_MID:
547 case POINT_RG_MID1:
548 case POINT_RG_MID2:
549 {
550 GtkWidget *dialog = sp_gradient_vector_editor_new (vector, sp_get_stop_i (vector, point_i));
551 gtk_widget_show (dialog);
552 }
553 break;
554 default:
555 break;
556 }
557 }
559 guint32
560 sp_item_gradient_stop_query_style (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
561 {
562 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
564 if (!gradient || !SP_IS_GRADIENT(gradient))
565 return 0;
567 SPGradient *vector = sp_gradient_get_vector (gradient, false);
569 if (!vector) // orphan!
570 return 0; // what else to do?
572 switch (point_type) {
573 case POINT_LG_BEGIN:
574 case POINT_RG_CENTER:
575 case POINT_RG_FOCUS:
576 {
577 SPStop *first = sp_first_stop (vector);
578 if (first) {
579 return sp_stop_get_rgba32(first);
580 }
581 }
582 break;
584 case POINT_LG_END:
585 case POINT_RG_R1:
586 case POINT_RG_R2:
587 {
588 SPStop *last = sp_last_stop (vector);
589 if (last) {
590 return sp_stop_get_rgba32(last);
591 }
592 }
593 break;
595 case POINT_LG_MID:
596 case POINT_RG_MID1:
597 case POINT_RG_MID2:
598 {
599 SPStop *stopi = sp_get_stop_i (vector, point_i);
600 if (stopi) {
601 return sp_stop_get_rgba32(stopi);
602 }
603 }
604 break;
606 default:
607 break;
608 }
609 return 0;
610 }
612 void
613 sp_item_gradient_stop_set_style (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke, SPCSSAttr *stop)
614 {
615 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
617 if (!gradient || !SP_IS_GRADIENT(gradient))
618 return;
620 SPGradient *vector = sp_gradient_get_vector (gradient, false);
622 if (!vector) // orphan!
623 return;
625 vector = sp_gradient_fork_vector_if_necessary (vector);
626 if ( gradient != vector && gradient->ref->getObject() != vector ) {
627 sp_gradient_repr_set_link(SP_OBJECT_REPR(gradient), vector);
628 }
630 switch (point_type) {
631 case POINT_LG_BEGIN:
632 case POINT_RG_CENTER:
633 case POINT_RG_FOCUS:
634 {
635 SPStop *first = sp_first_stop (vector);
636 if (first) {
637 sp_repr_css_change (SP_OBJECT_REPR (first), stop, "style");
638 }
639 }
640 break;
642 case POINT_LG_END:
643 case POINT_RG_R1:
644 case POINT_RG_R2:
645 {
646 SPStop *last = sp_last_stop (vector);
647 if (last) {
648 sp_repr_css_change (SP_OBJECT_REPR (last), stop, "style");
649 }
650 }
651 break;
653 case POINT_LG_MID:
654 case POINT_RG_MID1:
655 case POINT_RG_MID2:
656 {
657 SPStop *stopi = sp_get_stop_i (vector, point_i);
658 if (stopi) {
659 sp_repr_css_change (SP_OBJECT_REPR (stopi), stop, "style");
660 }
661 }
662 break;
664 default:
665 break;
666 }
667 }
669 void
670 sp_item_gradient_reverse_vector (SPItem *item, bool fill_or_stroke)
671 {
672 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
673 if (!gradient || !SP_IS_GRADIENT(gradient))
674 return;
676 SPGradient *vector = sp_gradient_get_vector (gradient, false);
677 if (!vector) // orphan!
678 return;
680 vector = sp_gradient_fork_vector_if_necessary (vector);
681 if ( gradient != vector && gradient->ref->getObject() != vector ) {
682 sp_gradient_repr_set_link(SP_OBJECT_REPR(gradient), vector);
683 }
685 GSList *child_reprs = NULL;
686 GSList *child_objects = NULL;
687 std::vector<double> offsets;
688 for (SPObject *child = sp_object_first_child(vector);
689 child != NULL; child = SP_OBJECT_NEXT(child)) {
690 child_reprs = g_slist_prepend (child_reprs, SP_OBJECT_REPR(child));
691 child_objects = g_slist_prepend (child_objects, child);
692 offsets.push_back(sp_repr_get_double_attribute(SP_OBJECT_REPR(child), "offset", 0));
693 }
695 GSList *child_copies = NULL;
696 for (GSList *i = child_reprs; i != NULL; i = i->next) {
697 Inkscape::XML::Node *repr = (Inkscape::XML::Node *) i->data;
698 child_copies = g_slist_append (child_copies, repr->duplicate());
699 }
702 for (GSList *i = child_objects; i != NULL; i = i->next) {
703 SPObject *child = SP_OBJECT (i->data);
704 child->deleteObject();
705 }
707 std::vector<double>::iterator iter = offsets.end() - 1;
708 for (GSList *i = child_copies; i != NULL; i = i->next) {
709 Inkscape::XML::Node *copy = (Inkscape::XML::Node *) i->data;
710 vector->appendChildRepr(copy);
711 sp_repr_set_svg_double (copy, "offset", 1 - *iter);
712 iter --;
713 Inkscape::GC::release(copy);
714 }
716 g_slist_free (child_reprs);
717 g_slist_free (child_copies);
718 g_slist_free (child_objects);
719 }
722 // FIXME: make general global function
723 static double
724 get_offset_between_points (NR::Point p, NR::Point begin, NR::Point end)
725 {
726 double length = NR::L2(end - begin);
727 NR::Point be = (end - begin) / length;
728 double r = NR::dot(p - begin, be);
730 if (r < 0.0) return 0.0;
731 if (r > length) return 1.0;
733 return (r / length);
734 }
737 /**
738 Set the position of point point_type of the gradient applied to item (either fill_or_stroke) to
739 p_w (in desktop coordinates). Write_repr if you want the change to become permanent.
740 */
741 void
742 sp_item_gradient_set_coords (SPItem *item, guint point_type, guint point_i, NR::Point p_w, bool fill_or_stroke, bool write_repr, bool scale)
743 {
744 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
746 if (!gradient || !SP_IS_GRADIENT(gradient))
747 return;
749 gradient = sp_gradient_convert_to_userspace (gradient, item, fill_or_stroke? "fill" : "stroke");
751 NR::Matrix i2d = sp_item_i2d_affine (item);
752 NR::Point p = p_w * i2d.inverse();
753 p *= (gradient->gradientTransform).inverse();
754 // now p is in gradient's original coordinates
756 Inkscape::XML::Node *repr = SP_OBJECT_REPR(gradient);
758 if (SP_IS_LINEARGRADIENT(gradient)) {
759 SPLinearGradient *lg = SP_LINEARGRADIENT(gradient);
760 switch (point_type) {
761 case POINT_LG_BEGIN:
762 if (scale) {
763 lg->x2.computed += (lg->x1.computed - p[NR::X]);
764 lg->y2.computed += (lg->y1.computed - p[NR::Y]);
765 }
766 lg->x1.computed = p[NR::X];
767 lg->y1.computed = p[NR::Y];
768 if (write_repr) {
769 if (scale) {
770 sp_repr_set_svg_double(repr, "x2", lg->x2.computed);
771 sp_repr_set_svg_double(repr, "y2", lg->y2.computed);
772 }
773 sp_repr_set_svg_double(repr, "x1", lg->x1.computed);
774 sp_repr_set_svg_double(repr, "y1", lg->y1.computed);
775 } else {
776 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
777 }
778 break;
779 case POINT_LG_END:
780 if (scale) {
781 lg->x1.computed += (lg->x2.computed - p[NR::X]);
782 lg->y1.computed += (lg->y2.computed - p[NR::Y]);
783 }
784 lg->x2.computed = p[NR::X];
785 lg->y2.computed = p[NR::Y];
786 if (write_repr) {
787 if (scale) {
788 sp_repr_set_svg_double(repr, "x1", lg->x1.computed);
789 sp_repr_set_svg_double(repr, "y1", lg->y1.computed);
790 }
791 sp_repr_set_svg_double(repr, "x2", lg->x2.computed);
792 sp_repr_set_svg_double(repr, "y2", lg->y2.computed);
793 } else {
794 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
795 }
796 break;
797 case POINT_LG_MID:
798 {
799 // using X-coordinates only to determine the offset, assuming p has been snapped to the vector from begin to end.
800 double offset = get_offset_between_points (p, NR::Point(lg->x1.computed, lg->y1.computed), NR::Point(lg->x2.computed, lg->y2.computed));
801 SPGradient *vector = sp_gradient_get_vector (lg, false);
802 lg->vector.stops.at(point_i).offset = offset;
803 SPStop* stopi = sp_get_stop_i(vector, point_i);
804 stopi->offset = offset;
805 if (write_repr) {
806 sp_repr_set_css_double(SP_OBJECT_REPR(stopi), "offset", stopi->offset);
807 } else {
808 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
809 }
810 }
811 break;
812 default:
813 break;
814 }
815 } else if (SP_IS_RADIALGRADIENT(gradient)) {
817 SPRadialGradient *rg = SP_RADIALGRADIENT(gradient);
818 NR::Point c (rg->cx.computed, rg->cy.computed);
819 NR::Point c_w = c * gradient->gradientTransform * i2d; // now in desktop coords
820 if ((point_type == POINT_RG_R1 || point_type == POINT_RG_R2) && NR::L2 (p_w - c_w) < 1e-3) {
821 // prevent setting a radius too close to the center
822 return;
823 }
824 NR::Matrix new_transform;
825 bool transform_set = false;
827 switch (point_type) {
828 case POINT_RG_CENTER:
829 rg->fx.computed = p[NR::X] + (rg->fx.computed - rg->cx.computed);
830 rg->fy.computed = p[NR::Y] + (rg->fy.computed - rg->cy.computed);
831 rg->cx.computed = p[NR::X];
832 rg->cy.computed = p[NR::Y];
833 if (write_repr) {
834 sp_repr_set_svg_double(repr, "fx", rg->fx.computed);
835 sp_repr_set_svg_double(repr, "fy", rg->fy.computed);
836 sp_repr_set_svg_double(repr, "cx", rg->cx.computed);
837 sp_repr_set_svg_double(repr, "cy", rg->cy.computed);
838 } else {
839 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
840 }
841 break;
842 case POINT_RG_FOCUS:
843 rg->fx.computed = p[NR::X];
844 rg->fy.computed = p[NR::Y];
845 if (write_repr) {
846 sp_repr_set_svg_double(repr, "fx", rg->fx.computed);
847 sp_repr_set_svg_double(repr, "fy", rg->fy.computed);
848 } else {
849 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
850 }
851 break;
852 case POINT_RG_R1:
853 {
854 NR::Point r1_w = (c + NR::Point(rg->r.computed, 0)) * gradient->gradientTransform * i2d;
855 double r1_angle = NR::atan2(r1_w - c_w);
856 double move_angle = NR::atan2(p_w - c_w) - r1_angle;
857 double move_stretch = NR::L2(p_w - c_w) / NR::L2(r1_w - c_w);
859 NR::Matrix move = NR::Matrix (NR::translate (-c_w)) *
860 NR::Matrix (NR::rotate(-r1_angle)) *
861 NR::Matrix (NR::scale(move_stretch, scale? move_stretch : 1)) *
862 NR::Matrix (NR::rotate(r1_angle)) *
863 NR::Matrix (NR::rotate(move_angle)) *
864 NR::Matrix (NR::translate (c_w));
866 new_transform = gradient->gradientTransform * i2d * move * i2d.inverse();
867 transform_set = true;
869 break;
870 }
871 case POINT_RG_R2:
872 {
873 NR::Point r2_w = (c + NR::Point(0, -rg->r.computed)) * gradient->gradientTransform * i2d;
874 double r2_angle = NR::atan2(r2_w - c_w);
875 double move_angle = NR::atan2(p_w - c_w) - r2_angle;
876 double move_stretch = NR::L2(p_w - c_w) / NR::L2(r2_w - c_w);
878 NR::Matrix move = NR::Matrix (NR::translate (-c_w)) *
879 NR::Matrix (NR::rotate(-r2_angle)) *
880 NR::Matrix (NR::scale(move_stretch, scale? move_stretch : 1)) *
881 NR::Matrix (NR::rotate(r2_angle)) *
882 NR::Matrix (NR::rotate(move_angle)) *
883 NR::Matrix (NR::translate (c_w));
885 new_transform = gradient->gradientTransform * i2d * move * i2d.inverse();
886 transform_set = true;
888 break;
889 }
890 case POINT_RG_MID1:
891 {
892 NR::Point start = NR::Point (rg->cx.computed, rg->cy.computed);
893 NR::Point end = NR::Point (rg->cx.computed + rg->r.computed, rg->cy.computed);
894 double offset = get_offset_between_points (p, start, end);
895 SPGradient *vector = sp_gradient_get_vector (rg, false);
896 rg->vector.stops.at(point_i).offset = offset;
897 SPStop* stopi = sp_get_stop_i(vector, point_i);
898 stopi->offset = offset;
899 if (write_repr) {
900 sp_repr_set_css_double(SP_OBJECT_REPR(stopi), "offset", stopi->offset);
901 } else {
902 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
903 }
904 break;
905 }
906 case POINT_RG_MID2:
907 NR::Point start = NR::Point (rg->cx.computed, rg->cy.computed);
908 NR::Point end = NR::Point (rg->cx.computed, rg->cy.computed - rg->r.computed);
909 double offset = get_offset_between_points (p, start, end);
910 SPGradient *vector = sp_gradient_get_vector (rg, false);
911 rg->vector.stops.at(point_i).offset = offset;
912 SPStop* stopi = sp_get_stop_i(vector, point_i);
913 stopi->offset = offset;
914 if (write_repr) {
915 sp_repr_set_css_double(SP_OBJECT_REPR(stopi), "offset", stopi->offset);
916 } else {
917 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
918 }
919 break;
920 }
921 if (transform_set) {
922 gradient->gradientTransform = new_transform;
923 gradient->gradientTransform_set = TRUE;
924 if (write_repr) {
925 gchar *s=sp_svg_transform_write(gradient->gradientTransform);
926 SP_OBJECT_REPR(gradient)->setAttribute("gradientTransform", s);
927 g_free(s);
928 } else {
929 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
930 }
931 }
932 }
933 }
935 SPGradient *
936 sp_item_gradient_get_vector (SPItem *item, bool fill_or_stroke)
937 {
938 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
940 if (gradient)
941 return sp_gradient_get_vector (gradient, false);
942 return NULL;
943 }
945 SPGradientSpread
946 sp_item_gradient_get_spread (SPItem *item, bool fill_or_stroke)
947 {
948 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
950 if (gradient)
951 return sp_gradient_get_spread (gradient);
952 return SP_GRADIENT_SPREAD_PAD;
953 }
956 /**
957 Returns the position of point point_type of the gradient applied to item (either fill_or_stroke),
958 in desktop coordinates.
959 */
961 NR::Point
962 sp_item_gradient_get_coords (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
963 {
964 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
966 NR::Point p (0, 0);
968 if (!gradient)
969 return p;
971 if (SP_IS_LINEARGRADIENT(gradient)) {
972 SPLinearGradient *lg = SP_LINEARGRADIENT(gradient);
973 switch (point_type) {
974 case POINT_LG_BEGIN:
975 p = NR::Point (lg->x1.computed, lg->y1.computed);
976 break;
977 case POINT_LG_END:
978 p = NR::Point (lg->x2.computed, lg->y2.computed);
979 break;
980 case POINT_LG_MID:
981 {
982 gdouble offset = lg->vector.stops.at(point_i).offset;
983 p = (1-offset) * NR::Point(lg->x1.computed, lg->y1.computed) + offset * NR::Point(lg->x2.computed, lg->y2.computed);
984 }
985 break;
986 }
987 } else if (SP_IS_RADIALGRADIENT(gradient)) {
988 SPRadialGradient *rg = SP_RADIALGRADIENT(gradient);
989 switch (point_type) {
990 case POINT_RG_CENTER:
991 p = NR::Point (rg->cx.computed, rg->cy.computed);
992 break;
993 case POINT_RG_FOCUS:
994 p = NR::Point (rg->fx.computed, rg->fy.computed);
995 break;
996 case POINT_RG_R1:
997 p = NR::Point (rg->cx.computed + rg->r.computed, rg->cy.computed);
998 break;
999 case POINT_RG_R2:
1000 p = NR::Point (rg->cx.computed, rg->cy.computed - rg->r.computed);
1001 break;
1002 case POINT_RG_MID1:
1003 {
1004 gdouble offset = rg->vector.stops.at(point_i).offset;
1005 p = (1-offset) * NR::Point (rg->cx.computed, rg->cy.computed) + offset * NR::Point(rg->cx.computed + rg->r.computed, rg->cy.computed);
1006 }
1007 break;
1008 case POINT_RG_MID2:
1009 {
1010 gdouble offset = rg->vector.stops.at(point_i).offset;
1011 p = (1-offset) * NR::Point (rg->cx.computed, rg->cy.computed) + offset * NR::Point(rg->cx.computed, rg->cy.computed - rg->r.computed);
1012 }
1013 break;
1014 }
1015 }
1017 if (SP_GRADIENT(gradient)->units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX) {
1018 sp_document_ensure_up_to_date(SP_OBJECT_DOCUMENT(item));
1019 NR::Maybe<NR::Rect> bbox = item->getBounds(NR::identity()); // we need "true" bbox without item_i2d_affine
1020 if (bbox) {
1021 p *= NR::Matrix(bbox->dimensions()[NR::X], 0,
1022 0, bbox->dimensions()[NR::Y],
1023 bbox->min()[NR::X], bbox->min()[NR::Y]);
1024 }
1025 }
1026 p *= NR::Matrix(gradient->gradientTransform) * sp_item_i2d_affine(item);
1027 return p;
1028 }
1031 /**
1032 * Sets item fill or stroke to the gradient of the specified type with given vector, creating
1033 * new private gradient, if needed.
1034 * gr has to be a normalized vector.
1035 */
1037 SPGradient *
1038 sp_item_set_gradient(SPItem *item, SPGradient *gr, SPGradientType type, bool is_fill)
1039 {
1040 g_return_val_if_fail(item != NULL, NULL);
1041 g_return_val_if_fail(SP_IS_ITEM(item), NULL);
1042 g_return_val_if_fail(gr != NULL, NULL);
1043 g_return_val_if_fail(SP_IS_GRADIENT(gr), NULL);
1044 g_return_val_if_fail(gr->state == SP_GRADIENT_STATE_VECTOR, NULL);
1046 SPStyle *style = SP_OBJECT_STYLE(item);
1047 g_assert(style != NULL);
1049 guint style_type = is_fill? style->fill.type : style->stroke.type;
1050 SPPaintServer *ps = NULL;
1051 if (style_type == SP_PAINT_TYPE_PAINTSERVER)
1052 ps = is_fill? SP_STYLE_FILL_SERVER(style) : SP_STYLE_STROKE_SERVER(style);
1054 if (ps
1055 && ( (type == SP_GRADIENT_TYPE_LINEAR && SP_IS_LINEARGRADIENT(ps)) ||
1056 (type == SP_GRADIENT_TYPE_RADIAL && SP_IS_RADIALGRADIENT(ps)) ) )
1057 {
1059 /* Current fill style is the gradient of the required type */
1060 SPGradient *current = SP_GRADIENT(ps);
1062 //g_print("hrefcount %d count %d\n", SP_OBJECT_HREFCOUNT(ig), count_gradient_hrefs(SP_OBJECT(item), ig));
1064 if (SP_OBJECT_HREFCOUNT(current) == 1 ||
1065 SP_OBJECT_HREFCOUNT(current) == count_gradient_hrefs(SP_OBJECT(item), current)) {
1067 // current is private and it's either used once, or all its uses are by children of item;
1068 // so just change its href to vector
1070 if ( current != gr && sp_gradient_get_vector(current, false) != gr ) {
1071 /* href is not the vector */
1072 sp_gradient_repr_set_link(SP_OBJECT_REPR(current), gr);
1073 }
1074 SP_OBJECT(item)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
1075 return current;
1077 } else {
1079 // the gradient is not private, or it is shared with someone else;
1080 // normalize it (this includes creating new private if necessary)
1081 SPGradient *normalized = sp_gradient_fork_private_if_necessary(current, gr, type, item);
1083 g_return_val_if_fail(normalized != NULL, NULL);
1085 if (normalized != current) {
1087 /* We have to change object style here; recursive because this is used from
1088 * fill&stroke and must work for groups etc. */
1089 sp_style_set_property_url(SP_OBJECT(item), is_fill? "fill" : "stroke", SP_OBJECT(normalized), true);
1090 }
1091 SP_OBJECT(item)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
1092 return normalized;
1093 }
1095 } else {
1096 /* Current fill style is not a gradient or wrong type, so construct everything */
1097 SPGradient *constructed = sp_gradient_get_private_normalized(SP_OBJECT_DOCUMENT(item), gr, type);
1098 constructed = sp_gradient_reset_to_userspace(constructed, item);
1099 sp_style_set_property_url(SP_OBJECT(item), ( is_fill ? "fill" : "stroke" ), SP_OBJECT(constructed), true);
1100 SP_OBJECT(item)->requestDisplayUpdate(( SP_OBJECT_MODIFIED_FLAG |
1101 SP_OBJECT_STYLE_MODIFIED_FLAG ));
1102 return constructed;
1103 }
1104 }
1106 static void
1107 sp_gradient_repr_set_link(Inkscape::XML::Node *repr, SPGradient *link)
1108 {
1109 g_return_if_fail(repr != NULL);
1110 g_return_if_fail(link != NULL);
1111 g_return_if_fail(SP_IS_GRADIENT(link));
1113 gchar *ref;
1114 if (link) {
1115 gchar const *id = SP_OBJECT_ID(link);
1116 size_t const len = strlen(id);
1117 ref = (gchar*) alloca(len + 2);
1118 *ref = '#';
1119 memcpy(ref + 1, id, len + 1);
1120 } else {
1121 ref = NULL;
1122 }
1124 repr->setAttribute("xlink:href", ref);
1125 }
1127 /*
1128 * Get default normalized gradient vector of document, create if there is none
1129 */
1131 SPGradient *
1132 sp_document_default_gradient_vector(SPDocument *document, guint32 color)
1133 {
1134 SPDefs *defs = (SPDefs *) SP_DOCUMENT_DEFS(document);
1135 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(document);
1137 Inkscape::XML::Node *repr = xml_doc->createElement("svg:linearGradient");
1139 repr->setAttribute("inkscape:collect", "always");
1140 // set here, but removed when it's edited in the gradient editor
1141 // to further reduce clutter, we could
1142 // (1) here, search gradients by color and return what is found without duplication
1143 // (2) in fill & stroke, show only one copy of each gradient in list
1145 Inkscape::XML::Node *stop = xml_doc->createElement("svg:stop");
1147 gchar b[64];
1148 sp_svg_write_color(b, 64, color);
1150 {
1151 gchar *t = g_strdup_printf("stop-color:%s;stop-opacity:1;", b);
1152 stop->setAttribute("style", t);
1153 g_free(t);
1154 }
1156 stop->setAttribute("offset", "0");
1158 repr->appendChild(stop);
1159 Inkscape::GC::release(stop);
1161 stop = xml_doc->createElement("svg:stop");
1163 {
1164 gchar *t = g_strdup_printf("stop-color:%s;stop-opacity:0;", b);
1165 stop->setAttribute("style", t);
1166 g_free(t);
1167 }
1169 stop->setAttribute("offset", "1");
1171 repr->appendChild(stop);
1172 Inkscape::GC::release(stop);
1174 SP_OBJECT_REPR(defs)->addChild(repr, NULL);
1175 Inkscape::GC::release(repr);
1177 /* fixme: This does not look like nice */
1178 SPGradient *gr;
1179 gr = (SPGradient *) document->getObjectByRepr(repr);
1180 g_assert(gr != NULL);
1181 g_assert(SP_IS_GRADIENT(gr));
1182 /* fixme: Maybe add extra sanity check here */
1183 gr->state = SP_GRADIENT_STATE_VECTOR;
1185 return gr;
1186 }
1188 /**
1189 Return the preferred vector for \a o, made from (in order of preference) its current vector,
1190 current fill or stroke color, or from desktop style if \a o is NULL or doesn't have style.
1191 */
1192 SPGradient *
1193 sp_gradient_vector_for_object(SPDocument *const doc, SPDesktop *const desktop,
1194 SPObject *const o, bool const is_fill)
1195 {
1196 guint32 rgba = 0;
1197 if (o == NULL || SP_OBJECT_STYLE(o) == NULL) {
1198 rgba = sp_desktop_get_color(desktop, is_fill);
1199 } else {
1200 // take the color of the object
1201 SPStyle const &style = *SP_OBJECT_STYLE(o);
1202 SPIPaint const &paint = ( is_fill
1203 ? style.fill
1204 : style.stroke );
1205 if (paint.type == SP_PAINT_TYPE_COLOR) {
1206 rgba = sp_color_get_rgba32_ualpha(&paint.value.color, 0xff);
1207 } else if (paint.type == SP_PAINT_TYPE_PAINTSERVER) {
1208 SPObject *server = is_fill? SP_OBJECT_STYLE_FILL_SERVER(o) : SP_OBJECT_STYLE_STROKE_SERVER(o);
1209 if (SP_IS_GRADIENT (server)) {
1210 return sp_gradient_get_vector(SP_GRADIENT (server), TRUE);
1211 } else {
1212 rgba = sp_desktop_get_color(desktop, is_fill);
1213 }
1214 } else {
1215 // if o doesn't use flat color, then take current color of the desktop.
1216 rgba = sp_desktop_get_color(desktop, is_fill);
1217 }
1218 }
1220 return sp_document_default_gradient_vector(doc, rgba);
1221 }
1224 SPGradient *
1225 sp_gradient_get_forked_vector_if_necessary(SPGradient *gradient, bool force_vector)
1226 {
1227 SPGradient *vector = sp_gradient_get_vector (gradient, force_vector);
1228 vector = sp_gradient_fork_vector_if_necessary (vector);
1229 if ( gradient != vector && gradient->ref->getObject() != vector ) {
1230 sp_gradient_repr_set_link(SP_OBJECT_REPR(gradient), vector);
1231 }
1232 return vector;
1233 }
1235 /*
1236 Local Variables:
1237 mode:c++
1238 c-file-style:"stroustrup"
1239 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1240 indent-tabs-mode:nil
1241 fill-column:99
1242 End:
1243 */
1244 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :