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 *doc = SP_OBJECT_DOCUMENT(gr);
238 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
240 Inkscape::XML::Node *repr = SP_OBJECT_REPR (gr)->duplicate(xml_doc);
241 SP_OBJECT_REPR (SP_DOCUMENT_DEFS (doc))->addChild(repr, NULL);
242 SPGradient *gr_new = (SPGradient *) doc->getObjectByRepr(repr);
243 gr_new = sp_gradient_ensure_vector_normalized (gr_new);
244 Inkscape::GC::release(repr);
245 return gr_new;
246 }
247 return gr;
248 }
250 /**
251 * Convert an item's gradient to userspace _without_ preserving coords, setting them to defaults
252 * instead. No forking or reapplying is done because this is only called for newly created privates.
253 * @return The new gradient.
254 */
255 SPGradient *
256 sp_gradient_reset_to_userspace (SPGradient *gr, SPItem *item)
257 {
258 Inkscape::XML::Node *repr = SP_OBJECT_REPR(gr);
260 // calculate the bbox of the item
261 sp_document_ensure_up_to_date(SP_OBJECT_DOCUMENT(item));
262 NR::Maybe<NR::Rect> bbox = item->getBounds(NR::identity()); // we need "true" bbox without item_i2d_affine
264 g_assert( bbox && !bbox->isEmpty() );
265 NR::Coord const width = bbox->dimensions()[NR::X];
266 NR::Coord const height = bbox->dimensions()[NR::Y];
268 NR::Point const center = bbox->midpoint();
270 if (SP_IS_RADIALGRADIENT(gr)) {
271 sp_repr_set_svg_double(repr, "cx", center[NR::X]);
272 sp_repr_set_svg_double(repr, "cy", center[NR::Y]);
273 sp_repr_set_svg_double(repr, "fx", center[NR::X]);
274 sp_repr_set_svg_double(repr, "fy", center[NR::Y]);
275 sp_repr_set_svg_double(repr, "r", width/2);
277 // we want it to be elliptic, not circular
278 NR::Matrix squeeze = NR::Matrix (NR::translate (-center)) *
279 NR::Matrix (NR::scale(1, height/width)) *
280 NR::Matrix (NR::translate (center));
282 gr->gradientTransform = squeeze;
283 {
284 gchar *c=sp_svg_transform_write(gr->gradientTransform);
285 SP_OBJECT_REPR(gr)->setAttribute("gradientTransform", c);
286 g_free(c);
287 }
288 } else {
289 sp_repr_set_svg_double(repr, "x1", (center - NR::Point(width/2, 0))[NR::X]);
290 sp_repr_set_svg_double(repr, "y1", (center - NR::Point(width/2, 0))[NR::Y]);
291 sp_repr_set_svg_double(repr, "x2", (center + NR::Point(width/2, 0))[NR::X]);
292 sp_repr_set_svg_double(repr, "y2", (center + NR::Point(width/2, 0))[NR::Y]);
293 }
295 // set the gradientUnits
296 repr->setAttribute("gradientUnits", "userSpaceOnUse");
298 return gr;
299 }
301 /**
302 * Convert an item's gradient to userspace if necessary, also fork it if necessary.
303 * @return The new gradient.
304 */
305 SPGradient *
306 sp_gradient_convert_to_userspace(SPGradient *gr, SPItem *item, gchar const *property)
307 {
308 g_return_val_if_fail(SP_IS_GRADIENT(gr), NULL);
310 // First, fork it if it is shared
311 gr = sp_gradient_fork_private_if_necessary(gr, sp_gradient_get_vector(gr, FALSE),
312 SP_IS_RADIALGRADIENT(gr) ? SP_GRADIENT_TYPE_RADIAL : SP_GRADIENT_TYPE_LINEAR, SP_OBJECT(item));
314 if (gr->units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX) {
316 Inkscape::XML::Node *repr = SP_OBJECT_REPR(gr);
318 // calculate the bbox of the item
319 sp_document_ensure_up_to_date(SP_OBJECT_DOCUMENT(item));
320 NR::Matrix bbox2user;
321 NR::Maybe<NR::Rect> bbox = item->getBounds(NR::identity()); // we need "true" bbox without item_i2d_affine
322 if ( bbox && !bbox->isEmpty() ) {
323 bbox2user = NR::Matrix(bbox->dimensions()[NR::X], 0,
324 0, bbox->dimensions()[NR::Y],
325 bbox->min()[NR::X], bbox->min()[NR::Y]);
326 } else {
327 // would be degenerate otherwise
328 bbox2user = NR::identity();
329 }
331 /* skew is the additional transform, defined by the proportions of the item, that we need
332 * to apply to the gradient in order to work around this weird bit from SVG 1.1
333 * (http://www.w3.org/TR/SVG11/pservers.html#LinearGradients):
334 *
335 * When gradientUnits="objectBoundingBox" and gradientTransform is the identity
336 * matrix, the stripes of the linear gradient are perpendicular to the gradient
337 * vector in object bounding box space (i.e., the abstract coordinate system where
338 * (0,0) is at the top/left of the object bounding box and (1,1) is at the
339 * bottom/right of the object bounding box). When the object's bounding box is not
340 * square, the stripes that are conceptually perpendicular to the gradient vector
341 * within object bounding box space will render non-perpendicular relative to the
342 * gradient vector in user space due to application of the non-uniform scaling
343 * transformation from bounding box space to user space.
344 */
345 NR::Matrix skew = bbox2user;
346 double exp = skew.expansion();
347 skew[0] /= exp;
348 skew[1] /= exp;
349 skew[2] /= exp;
350 skew[3] /= exp;
351 skew[4] = 0;
352 skew[5] = 0;
354 // apply skew to the gradient
355 gr->gradientTransform = skew;
356 {
357 gchar *c=sp_svg_transform_write(gr->gradientTransform);
358 SP_OBJECT_REPR(gr)->setAttribute("gradientTransform", c);
359 g_free(c);
360 }
362 // Matrix to convert points to userspace coords; postmultiply by inverse of skew so
363 // as to cancel it out when it's applied to the gradient during rendering
364 NR::Matrix point_convert = bbox2user * skew.inverse();
366 if (SP_IS_RADIALGRADIENT(gr)) {
367 SPRadialGradient *rg = SP_RADIALGRADIENT(gr);
369 // original points in the bbox coords
370 NR::Point c_b = NR::Point(rg->cx.computed, rg->cy.computed);
371 NR::Point f_b = NR::Point(rg->fx.computed, rg->fy.computed);
372 double r_b = rg->r.computed;
374 // converted points in userspace coords
375 NR::Point c_u = c_b * point_convert;
376 NR::Point f_u = f_b * point_convert;
377 double r_u = r_b * point_convert.expansion();
379 sp_repr_set_svg_double(repr, "cx", c_u[NR::X]);
380 sp_repr_set_svg_double(repr, "cy", c_u[NR::Y]);
381 sp_repr_set_svg_double(repr, "fx", f_u[NR::X]);
382 sp_repr_set_svg_double(repr, "fy", f_u[NR::Y]);
383 sp_repr_set_svg_double(repr, "r", r_u);
385 } else {
386 SPLinearGradient *lg = SP_LINEARGRADIENT(gr);
388 NR::Point p1_b = NR::Point(lg->x1.computed, lg->y1.computed);
389 NR::Point p2_b = NR::Point(lg->x2.computed, lg->y2.computed);
391 NR::Point p1_u = p1_b * point_convert;
392 NR::Point p2_u = p2_b * point_convert;
394 sp_repr_set_svg_double(repr, "x1", p1_u[NR::X]);
395 sp_repr_set_svg_double(repr, "y1", p1_u[NR::Y]);
396 sp_repr_set_svg_double(repr, "x2", p2_u[NR::X]);
397 sp_repr_set_svg_double(repr, "y2", p2_u[NR::Y]);
398 }
400 // set the gradientUnits
401 repr->setAttribute("gradientUnits", "userSpaceOnUse");
402 }
404 // apply the gradient to the item (may be necessary if we forked it); not recursive
405 // generally because grouped items will be taken care of later (we're being called
406 // from sp_item_adjust_paint_recursive); however text and all its children should all
407 // refer to one gradient, hence the recursive call for text (because we can't/don't
408 // want to access tspans and set gradients on them separately)
409 if (SP_IS_TEXT(item))
410 sp_style_set_property_url(SP_OBJECT(item), property, SP_OBJECT(gr), true);
411 else
412 sp_style_set_property_url(SP_OBJECT(item), property, SP_OBJECT(gr), false);
414 return gr;
415 }
417 void
418 sp_gradient_transform_multiply(SPGradient *gradient, NR::Matrix postmul, bool set)
419 {
420 if (set) {
421 gradient->gradientTransform = postmul;
422 } else {
423 gradient->gradientTransform *= postmul; // fixme: get gradient transform by climbing to hrefs?
424 }
425 gradient->gradientTransform_set = TRUE;
427 gchar *c=sp_svg_transform_write(gradient->gradientTransform);
428 SP_OBJECT_REPR(gradient)->setAttribute("gradientTransform", c);
429 g_free(c);
430 }
432 SPGradient *
433 sp_item_gradient (SPItem *item, bool fill_or_stroke)
434 {
435 SPStyle *style = SP_OBJECT_STYLE (item);
436 SPGradient *gradient = NULL;
438 if (fill_or_stroke) {
439 if (style && (style->fill.type == SP_PAINT_TYPE_PAINTSERVER)) {
440 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER(item);
441 if (SP_IS_GRADIENT (server)) {
442 gradient = SP_GRADIENT (server);
443 }
444 }
445 } else {
446 if (style && (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)) {
447 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER(item);
448 if (SP_IS_GRADIENT (server)) {
449 gradient = SP_GRADIENT (server);
450 }
451 }
452 }
454 return gradient;
455 }
458 SPStop*
459 sp_first_stop(SPGradient *gradient)
460 {
461 for (SPObject *ochild = sp_object_first_child(gradient); ochild != NULL; ochild = SP_OBJECT_NEXT(ochild)) {
462 if (SP_IS_STOP (ochild))
463 return SP_STOP(ochild);
464 }
465 return NULL;
466 }
468 SPStop*
469 sp_prev_stop(SPStop *stop, SPGradient *gradient)
470 {
471 if (sp_object_first_child(SP_OBJECT(gradient)) == SP_OBJECT(stop))
472 return NULL;
473 SPObject *found = NULL;
474 for ( SPObject *ochild = sp_object_first_child(SP_OBJECT(gradient)) ; ochild != NULL ; ochild = SP_OBJECT_NEXT(ochild) ) {
475 if (SP_IS_STOP (ochild)) {
476 found = ochild;
477 }
478 if (SP_OBJECT_NEXT(ochild) == SP_OBJECT(stop) || SP_OBJECT(ochild) == SP_OBJECT(stop)) {
479 break;
480 }
481 }
482 return SP_STOP(found);
483 }
485 SPStop*
486 sp_next_stop(SPStop *stop)
487 {
488 for (SPObject *ochild = SP_OBJECT_NEXT(stop); ochild != NULL; ochild = SP_OBJECT_NEXT(ochild)) {
489 if (SP_IS_STOP (ochild))
490 return SP_STOP(ochild);
491 }
492 return NULL;
493 }
495 SPStop*
496 sp_last_stop(SPGradient *gradient)
497 {
498 for (SPStop *stop = sp_first_stop (gradient); stop != NULL; stop = sp_next_stop (stop)) {
499 if (sp_next_stop (stop) == NULL)
500 return stop;
501 }
502 return NULL;
503 }
505 SPStop*
506 sp_get_stop_i(SPGradient *gradient, guint stop_i)
507 {
508 SPStop *stop = sp_first_stop (gradient);
510 for (guint i=0; i < stop_i; i++) {
511 if (!stop) return NULL;
512 stop = sp_next_stop (stop);
513 }
515 return stop;
516 }
519 void
520 sp_item_gradient_edit_stop (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
521 {
522 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
524 if (!gradient || !SP_IS_GRADIENT(gradient))
525 return;
527 SPGradient *vector = sp_gradient_get_vector (gradient, false);
528 switch (point_type) {
529 case POINT_LG_BEGIN:
530 case POINT_RG_CENTER:
531 case POINT_RG_FOCUS:
532 {
533 GtkWidget *dialog = sp_gradient_vector_editor_new (vector, sp_first_stop (vector));
534 gtk_widget_show (dialog);
535 }
536 break;
538 case POINT_LG_END:
539 case POINT_RG_R1:
540 case POINT_RG_R2:
541 {
542 GtkWidget *dialog = sp_gradient_vector_editor_new (vector, sp_last_stop (vector));
543 gtk_widget_show (dialog);
544 }
545 break;
547 case POINT_LG_MID:
548 case POINT_RG_MID1:
549 case POINT_RG_MID2:
550 {
551 GtkWidget *dialog = sp_gradient_vector_editor_new (vector, sp_get_stop_i (vector, point_i));
552 gtk_widget_show (dialog);
553 }
554 break;
555 default:
556 break;
557 }
558 }
560 guint32
561 sp_item_gradient_stop_query_style (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
562 {
563 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
565 if (!gradient || !SP_IS_GRADIENT(gradient))
566 return 0;
568 SPGradient *vector = sp_gradient_get_vector (gradient, false);
570 if (!vector) // orphan!
571 return 0; // what else to do?
573 switch (point_type) {
574 case POINT_LG_BEGIN:
575 case POINT_RG_CENTER:
576 case POINT_RG_FOCUS:
577 {
578 SPStop *first = sp_first_stop (vector);
579 if (first) {
580 return sp_stop_get_rgba32(first);
581 }
582 }
583 break;
585 case POINT_LG_END:
586 case POINT_RG_R1:
587 case POINT_RG_R2:
588 {
589 SPStop *last = sp_last_stop (vector);
590 if (last) {
591 return sp_stop_get_rgba32(last);
592 }
593 }
594 break;
596 case POINT_LG_MID:
597 case POINT_RG_MID1:
598 case POINT_RG_MID2:
599 {
600 SPStop *stopi = sp_get_stop_i (vector, point_i);
601 if (stopi) {
602 return sp_stop_get_rgba32(stopi);
603 }
604 }
605 break;
607 default:
608 break;
609 }
610 return 0;
611 }
613 void
614 sp_item_gradient_stop_set_style (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke, SPCSSAttr *stop)
615 {
616 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
618 if (!gradient || !SP_IS_GRADIENT(gradient))
619 return;
621 SPGradient *vector = sp_gradient_get_vector (gradient, false);
623 if (!vector) // orphan!
624 return;
626 vector = sp_gradient_fork_vector_if_necessary (vector);
627 if ( gradient != vector && gradient->ref->getObject() != vector ) {
628 sp_gradient_repr_set_link(SP_OBJECT_REPR(gradient), vector);
629 }
631 switch (point_type) {
632 case POINT_LG_BEGIN:
633 case POINT_RG_CENTER:
634 case POINT_RG_FOCUS:
635 {
636 SPStop *first = sp_first_stop (vector);
637 if (first) {
638 sp_repr_css_change (SP_OBJECT_REPR (first), stop, "style");
639 }
640 }
641 break;
643 case POINT_LG_END:
644 case POINT_RG_R1:
645 case POINT_RG_R2:
646 {
647 SPStop *last = sp_last_stop (vector);
648 if (last) {
649 sp_repr_css_change (SP_OBJECT_REPR (last), stop, "style");
650 }
651 }
652 break;
654 case POINT_LG_MID:
655 case POINT_RG_MID1:
656 case POINT_RG_MID2:
657 {
658 SPStop *stopi = sp_get_stop_i (vector, point_i);
659 if (stopi) {
660 sp_repr_css_change (SP_OBJECT_REPR (stopi), stop, "style");
661 }
662 }
663 break;
665 default:
666 break;
667 }
668 }
670 void
671 sp_item_gradient_reverse_vector (SPItem *item, bool fill_or_stroke)
672 {
673 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
674 if (!gradient || !SP_IS_GRADIENT(gradient))
675 return;
677 SPGradient *vector = sp_gradient_get_vector (gradient, false);
678 if (!vector) // orphan!
679 return;
681 vector = sp_gradient_fork_vector_if_necessary (vector);
682 if ( gradient != vector && gradient->ref->getObject() != vector ) {
683 sp_gradient_repr_set_link(SP_OBJECT_REPR(gradient), vector);
684 }
686 GSList *child_reprs = NULL;
687 GSList *child_objects = NULL;
688 std::vector<double> offsets;
689 for (SPObject *child = sp_object_first_child(vector);
690 child != NULL; child = SP_OBJECT_NEXT(child)) {
691 child_reprs = g_slist_prepend (child_reprs, SP_OBJECT_REPR(child));
692 child_objects = g_slist_prepend (child_objects, child);
693 offsets.push_back(sp_repr_get_double_attribute(SP_OBJECT_REPR(child), "offset", 0));
694 }
696 GSList *child_copies = NULL;
697 for (GSList *i = child_reprs; i != NULL; i = i->next) {
698 Inkscape::XML::Node *repr = (Inkscape::XML::Node *) i->data;
699 Inkscape::XML::Document *xml_doc = SP_OBJECT_REPR(vector)->document();
700 child_copies = g_slist_append (child_copies, repr->duplicate(xml_doc));
701 }
704 for (GSList *i = child_objects; i != NULL; i = i->next) {
705 SPObject *child = SP_OBJECT (i->data);
706 child->deleteObject();
707 }
709 std::vector<double>::iterator iter = offsets.end() - 1;
710 for (GSList *i = child_copies; i != NULL; i = i->next) {
711 Inkscape::XML::Node *copy = (Inkscape::XML::Node *) i->data;
712 vector->appendChildRepr(copy);
713 sp_repr_set_svg_double (copy, "offset", 1 - *iter);
714 iter --;
715 Inkscape::GC::release(copy);
716 }
718 g_slist_free (child_reprs);
719 g_slist_free (child_copies);
720 g_slist_free (child_objects);
721 }
724 // FIXME: make general global function
725 static double
726 get_offset_between_points (NR::Point p, NR::Point begin, NR::Point end)
727 {
728 double length = NR::L2(end - begin);
729 NR::Point be = (end - begin) / length;
730 double r = NR::dot(p - begin, be);
732 if (r < 0.0) return 0.0;
733 if (r > length) return 1.0;
735 return (r / length);
736 }
739 /**
740 Set the position of point point_type of the gradient applied to item (either fill_or_stroke) to
741 p_w (in desktop coordinates). Write_repr if you want the change to become permanent.
742 */
743 void
744 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)
745 {
746 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
748 if (!gradient || !SP_IS_GRADIENT(gradient))
749 return;
751 gradient = sp_gradient_convert_to_userspace (gradient, item, fill_or_stroke? "fill" : "stroke");
753 NR::Matrix i2d = sp_item_i2d_affine (item);
754 NR::Point p = p_w * i2d.inverse();
755 p *= (gradient->gradientTransform).inverse();
756 // now p is in gradient's original coordinates
758 Inkscape::XML::Node *repr = SP_OBJECT_REPR(gradient);
760 if (SP_IS_LINEARGRADIENT(gradient)) {
761 SPLinearGradient *lg = SP_LINEARGRADIENT(gradient);
762 switch (point_type) {
763 case POINT_LG_BEGIN:
764 if (scale) {
765 lg->x2.computed += (lg->x1.computed - p[NR::X]);
766 lg->y2.computed += (lg->y1.computed - p[NR::Y]);
767 }
768 lg->x1.computed = p[NR::X];
769 lg->y1.computed = p[NR::Y];
770 if (write_repr) {
771 if (scale) {
772 sp_repr_set_svg_double(repr, "x2", lg->x2.computed);
773 sp_repr_set_svg_double(repr, "y2", lg->y2.computed);
774 }
775 sp_repr_set_svg_double(repr, "x1", lg->x1.computed);
776 sp_repr_set_svg_double(repr, "y1", lg->y1.computed);
777 } else {
778 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
779 }
780 break;
781 case POINT_LG_END:
782 if (scale) {
783 lg->x1.computed += (lg->x2.computed - p[NR::X]);
784 lg->y1.computed += (lg->y2.computed - p[NR::Y]);
785 }
786 lg->x2.computed = p[NR::X];
787 lg->y2.computed = p[NR::Y];
788 if (write_repr) {
789 if (scale) {
790 sp_repr_set_svg_double(repr, "x1", lg->x1.computed);
791 sp_repr_set_svg_double(repr, "y1", lg->y1.computed);
792 }
793 sp_repr_set_svg_double(repr, "x2", lg->x2.computed);
794 sp_repr_set_svg_double(repr, "y2", lg->y2.computed);
795 } else {
796 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
797 }
798 break;
799 case POINT_LG_MID:
800 {
801 // using X-coordinates only to determine the offset, assuming p has been snapped to the vector from begin to end.
802 sp_gradient_ensure_vector(gradient);
803 double offset = get_offset_between_points (p, NR::Point(lg->x1.computed, lg->y1.computed), NR::Point(lg->x2.computed, lg->y2.computed));
804 SPGradient *vector = sp_gradient_get_vector (lg, false);
805 lg->vector.stops.at(point_i).offset = offset;
806 SPStop* stopi = sp_get_stop_i(vector, point_i);
807 stopi->offset = offset;
808 if (write_repr) {
809 sp_repr_set_css_double(SP_OBJECT_REPR(stopi), "offset", stopi->offset);
810 } else {
811 SP_OBJECT (stopi)->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
812 }
813 }
814 break;
815 default:
816 break;
817 }
818 } else if (SP_IS_RADIALGRADIENT(gradient)) {
820 SPRadialGradient *rg = SP_RADIALGRADIENT(gradient);
821 NR::Point c (rg->cx.computed, rg->cy.computed);
822 NR::Point c_w = c * gradient->gradientTransform * i2d; // now in desktop coords
823 if ((point_type == POINT_RG_R1 || point_type == POINT_RG_R2) && NR::L2 (p_w - c_w) < 1e-3) {
824 // prevent setting a radius too close to the center
825 return;
826 }
827 NR::Matrix new_transform;
828 bool transform_set = false;
830 switch (point_type) {
831 case POINT_RG_CENTER:
832 rg->fx.computed = p[NR::X] + (rg->fx.computed - rg->cx.computed);
833 rg->fy.computed = p[NR::Y] + (rg->fy.computed - rg->cy.computed);
834 rg->cx.computed = p[NR::X];
835 rg->cy.computed = p[NR::Y];
836 if (write_repr) {
837 sp_repr_set_svg_double(repr, "fx", rg->fx.computed);
838 sp_repr_set_svg_double(repr, "fy", rg->fy.computed);
839 sp_repr_set_svg_double(repr, "cx", rg->cx.computed);
840 sp_repr_set_svg_double(repr, "cy", rg->cy.computed);
841 } else {
842 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
843 }
844 break;
845 case POINT_RG_FOCUS:
846 rg->fx.computed = p[NR::X];
847 rg->fy.computed = p[NR::Y];
848 if (write_repr) {
849 sp_repr_set_svg_double(repr, "fx", rg->fx.computed);
850 sp_repr_set_svg_double(repr, "fy", rg->fy.computed);
851 } else {
852 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
853 }
854 break;
855 case POINT_RG_R1:
856 {
857 NR::Point r1_w = (c + NR::Point(rg->r.computed, 0)) * gradient->gradientTransform * i2d;
858 double r1_angle = NR::atan2(r1_w - c_w);
859 double move_angle = NR::atan2(p_w - c_w) - r1_angle;
860 double move_stretch = NR::L2(p_w - c_w) / NR::L2(r1_w - c_w);
862 NR::Matrix move = NR::Matrix (NR::translate (-c_w)) *
863 NR::Matrix (NR::rotate(-r1_angle)) *
864 NR::Matrix (NR::scale(move_stretch, scale? move_stretch : 1)) *
865 NR::Matrix (NR::rotate(r1_angle)) *
866 NR::Matrix (NR::rotate(move_angle)) *
867 NR::Matrix (NR::translate (c_w));
869 new_transform = gradient->gradientTransform * i2d * move * i2d.inverse();
870 transform_set = true;
872 break;
873 }
874 case POINT_RG_R2:
875 {
876 NR::Point r2_w = (c + NR::Point(0, -rg->r.computed)) * gradient->gradientTransform * i2d;
877 double r2_angle = NR::atan2(r2_w - c_w);
878 double move_angle = NR::atan2(p_w - c_w) - r2_angle;
879 double move_stretch = NR::L2(p_w - c_w) / NR::L2(r2_w - c_w);
881 NR::Matrix move = NR::Matrix (NR::translate (-c_w)) *
882 NR::Matrix (NR::rotate(-r2_angle)) *
883 NR::Matrix (NR::scale(move_stretch, scale? move_stretch : 1)) *
884 NR::Matrix (NR::rotate(r2_angle)) *
885 NR::Matrix (NR::rotate(move_angle)) *
886 NR::Matrix (NR::translate (c_w));
888 new_transform = gradient->gradientTransform * i2d * move * i2d.inverse();
889 transform_set = true;
891 break;
892 }
893 case POINT_RG_MID1:
894 {
895 NR::Point start = NR::Point (rg->cx.computed, rg->cy.computed);
896 NR::Point end = NR::Point (rg->cx.computed + rg->r.computed, rg->cy.computed);
897 double offset = get_offset_between_points (p, start, end);
898 SPGradient *vector = sp_gradient_get_vector (rg, false);
899 rg->vector.stops.at(point_i).offset = offset;
900 SPStop* stopi = sp_get_stop_i(vector, point_i);
901 stopi->offset = offset;
902 if (write_repr) {
903 sp_repr_set_css_double(SP_OBJECT_REPR(stopi), "offset", stopi->offset);
904 } else {
905 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
906 }
907 break;
908 }
909 case POINT_RG_MID2:
910 NR::Point start = NR::Point (rg->cx.computed, rg->cy.computed);
911 NR::Point end = NR::Point (rg->cx.computed, rg->cy.computed - rg->r.computed);
912 double offset = get_offset_between_points (p, start, end);
913 SPGradient *vector = sp_gradient_get_vector (rg, false);
914 rg->vector.stops.at(point_i).offset = offset;
915 SPStop* stopi = sp_get_stop_i(vector, point_i);
916 stopi->offset = offset;
917 if (write_repr) {
918 sp_repr_set_css_double(SP_OBJECT_REPR(stopi), "offset", stopi->offset);
919 } else {
920 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
921 }
922 break;
923 }
924 if (transform_set) {
925 gradient->gradientTransform = new_transform;
926 gradient->gradientTransform_set = TRUE;
927 if (write_repr) {
928 gchar *s=sp_svg_transform_write(gradient->gradientTransform);
929 SP_OBJECT_REPR(gradient)->setAttribute("gradientTransform", s);
930 g_free(s);
931 } else {
932 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
933 }
934 }
935 }
936 }
938 SPGradient *
939 sp_item_gradient_get_vector (SPItem *item, bool fill_or_stroke)
940 {
941 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
943 if (gradient)
944 return sp_gradient_get_vector (gradient, false);
945 return NULL;
946 }
948 SPGradientSpread
949 sp_item_gradient_get_spread (SPItem *item, bool fill_or_stroke)
950 {
951 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
953 if (gradient)
954 return sp_gradient_get_spread (gradient);
955 return SP_GRADIENT_SPREAD_PAD;
956 }
959 /**
960 Returns the position of point point_type of the gradient applied to item (either fill_or_stroke),
961 in desktop coordinates.
962 */
964 NR::Point
965 sp_item_gradient_get_coords (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
966 {
967 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
969 NR::Point p (0, 0);
971 if (!gradient)
972 return p;
974 if (SP_IS_LINEARGRADIENT(gradient)) {
975 SPLinearGradient *lg = SP_LINEARGRADIENT(gradient);
976 switch (point_type) {
977 case POINT_LG_BEGIN:
978 p = NR::Point (lg->x1.computed, lg->y1.computed);
979 break;
980 case POINT_LG_END:
981 p = NR::Point (lg->x2.computed, lg->y2.computed);
982 break;
983 case POINT_LG_MID:
984 {
985 gdouble offset = lg->vector.stops.at(point_i).offset;
986 p = (1-offset) * NR::Point(lg->x1.computed, lg->y1.computed) + offset * NR::Point(lg->x2.computed, lg->y2.computed);
987 }
988 break;
989 }
990 } else if (SP_IS_RADIALGRADIENT(gradient)) {
991 SPRadialGradient *rg = SP_RADIALGRADIENT(gradient);
992 switch (point_type) {
993 case POINT_RG_CENTER:
994 p = NR::Point (rg->cx.computed, rg->cy.computed);
995 break;
996 case POINT_RG_FOCUS:
997 p = NR::Point (rg->fx.computed, rg->fy.computed);
998 break;
999 case POINT_RG_R1:
1000 p = NR::Point (rg->cx.computed + rg->r.computed, rg->cy.computed);
1001 break;
1002 case POINT_RG_R2:
1003 p = NR::Point (rg->cx.computed, rg->cy.computed - rg->r.computed);
1004 break;
1005 case POINT_RG_MID1:
1006 {
1007 gdouble offset = rg->vector.stops.at(point_i).offset;
1008 p = (1-offset) * NR::Point (rg->cx.computed, rg->cy.computed) + offset * NR::Point(rg->cx.computed + rg->r.computed, rg->cy.computed);
1009 }
1010 break;
1011 case POINT_RG_MID2:
1012 {
1013 gdouble offset = rg->vector.stops.at(point_i).offset;
1014 p = (1-offset) * NR::Point (rg->cx.computed, rg->cy.computed) + offset * NR::Point(rg->cx.computed, rg->cy.computed - rg->r.computed);
1015 }
1016 break;
1017 }
1018 }
1020 if (SP_GRADIENT(gradient)->units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX) {
1021 sp_document_ensure_up_to_date(SP_OBJECT_DOCUMENT(item));
1022 NR::Maybe<NR::Rect> bbox = item->getBounds(NR::identity()); // we need "true" bbox without item_i2d_affine
1023 if (bbox) {
1024 p *= NR::Matrix(bbox->dimensions()[NR::X], 0,
1025 0, bbox->dimensions()[NR::Y],
1026 bbox->min()[NR::X], bbox->min()[NR::Y]);
1027 }
1028 }
1029 p *= NR::Matrix(gradient->gradientTransform) * sp_item_i2d_affine(item);
1030 return p;
1031 }
1034 /**
1035 * Sets item fill or stroke to the gradient of the specified type with given vector, creating
1036 * new private gradient, if needed.
1037 * gr has to be a normalized vector.
1038 */
1040 SPGradient *
1041 sp_item_set_gradient(SPItem *item, SPGradient *gr, SPGradientType type, bool is_fill)
1042 {
1043 g_return_val_if_fail(item != NULL, NULL);
1044 g_return_val_if_fail(SP_IS_ITEM(item), NULL);
1045 g_return_val_if_fail(gr != NULL, NULL);
1046 g_return_val_if_fail(SP_IS_GRADIENT(gr), NULL);
1047 g_return_val_if_fail(gr->state == SP_GRADIENT_STATE_VECTOR, NULL);
1049 SPStyle *style = SP_OBJECT_STYLE(item);
1050 g_assert(style != NULL);
1052 guint style_type = is_fill? style->fill.type : style->stroke.type;
1053 SPPaintServer *ps = NULL;
1054 if (style_type == SP_PAINT_TYPE_PAINTSERVER)
1055 ps = is_fill? SP_STYLE_FILL_SERVER(style) : SP_STYLE_STROKE_SERVER(style);
1057 if (ps
1058 && ( (type == SP_GRADIENT_TYPE_LINEAR && SP_IS_LINEARGRADIENT(ps)) ||
1059 (type == SP_GRADIENT_TYPE_RADIAL && SP_IS_RADIALGRADIENT(ps)) ) )
1060 {
1062 /* Current fill style is the gradient of the required type */
1063 SPGradient *current = SP_GRADIENT(ps);
1065 //g_print("hrefcount %d count %d\n", SP_OBJECT_HREFCOUNT(ig), count_gradient_hrefs(SP_OBJECT(item), ig));
1067 if (SP_OBJECT_HREFCOUNT(current) == 1 ||
1068 SP_OBJECT_HREFCOUNT(current) == count_gradient_hrefs(SP_OBJECT(item), current)) {
1070 // current is private and it's either used once, or all its uses are by children of item;
1071 // so just change its href to vector
1073 if ( current != gr && sp_gradient_get_vector(current, false) != gr ) {
1074 /* href is not the vector */
1075 sp_gradient_repr_set_link(SP_OBJECT_REPR(current), gr);
1076 }
1077 SP_OBJECT(item)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
1078 return current;
1080 } else {
1082 // the gradient is not private, or it is shared with someone else;
1083 // normalize it (this includes creating new private if necessary)
1084 SPGradient *normalized = sp_gradient_fork_private_if_necessary(current, gr, type, item);
1086 g_return_val_if_fail(normalized != NULL, NULL);
1088 if (normalized != current) {
1090 /* We have to change object style here; recursive because this is used from
1091 * fill&stroke and must work for groups etc. */
1092 sp_style_set_property_url(SP_OBJECT(item), is_fill? "fill" : "stroke", SP_OBJECT(normalized), true);
1093 }
1094 SP_OBJECT(item)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
1095 return normalized;
1096 }
1098 } else {
1099 /* Current fill style is not a gradient or wrong type, so construct everything */
1100 SPGradient *constructed = sp_gradient_get_private_normalized(SP_OBJECT_DOCUMENT(item), gr, type);
1101 constructed = sp_gradient_reset_to_userspace(constructed, item);
1102 sp_style_set_property_url(SP_OBJECT(item), ( is_fill ? "fill" : "stroke" ), SP_OBJECT(constructed), true);
1103 SP_OBJECT(item)->requestDisplayUpdate(( SP_OBJECT_MODIFIED_FLAG |
1104 SP_OBJECT_STYLE_MODIFIED_FLAG ));
1105 return constructed;
1106 }
1107 }
1109 static void
1110 sp_gradient_repr_set_link(Inkscape::XML::Node *repr, SPGradient *link)
1111 {
1112 g_return_if_fail(repr != NULL);
1113 g_return_if_fail(link != NULL);
1114 g_return_if_fail(SP_IS_GRADIENT(link));
1116 gchar *ref;
1117 if (link) {
1118 gchar const *id = SP_OBJECT_ID(link);
1119 size_t const len = strlen(id);
1120 ref = (gchar*) alloca(len + 2);
1121 *ref = '#';
1122 memcpy(ref + 1, id, len + 1);
1123 } else {
1124 ref = NULL;
1125 }
1127 repr->setAttribute("xlink:href", ref);
1128 }
1130 /*
1131 * Get default normalized gradient vector of document, create if there is none
1132 */
1134 SPGradient *
1135 sp_document_default_gradient_vector(SPDocument *document, guint32 color)
1136 {
1137 SPDefs *defs = (SPDefs *) SP_DOCUMENT_DEFS(document);
1138 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(document);
1140 Inkscape::XML::Node *repr = xml_doc->createElement("svg:linearGradient");
1142 repr->setAttribute("inkscape:collect", "always");
1143 // set here, but removed when it's edited in the gradient editor
1144 // to further reduce clutter, we could
1145 // (1) here, search gradients by color and return what is found without duplication
1146 // (2) in fill & stroke, show only one copy of each gradient in list
1148 Inkscape::XML::Node *stop = xml_doc->createElement("svg:stop");
1150 gchar b[64];
1151 sp_svg_write_color(b, 64, color);
1153 {
1154 gchar *t = g_strdup_printf("stop-color:%s;stop-opacity:1;", b);
1155 stop->setAttribute("style", t);
1156 g_free(t);
1157 }
1159 stop->setAttribute("offset", "0");
1161 repr->appendChild(stop);
1162 Inkscape::GC::release(stop);
1164 stop = xml_doc->createElement("svg:stop");
1166 {
1167 gchar *t = g_strdup_printf("stop-color:%s;stop-opacity:0;", b);
1168 stop->setAttribute("style", t);
1169 g_free(t);
1170 }
1172 stop->setAttribute("offset", "1");
1174 repr->appendChild(stop);
1175 Inkscape::GC::release(stop);
1177 SP_OBJECT_REPR(defs)->addChild(repr, NULL);
1178 Inkscape::GC::release(repr);
1180 /* fixme: This does not look like nice */
1181 SPGradient *gr;
1182 gr = (SPGradient *) document->getObjectByRepr(repr);
1183 g_assert(gr != NULL);
1184 g_assert(SP_IS_GRADIENT(gr));
1185 /* fixme: Maybe add extra sanity check here */
1186 gr->state = SP_GRADIENT_STATE_VECTOR;
1188 return gr;
1189 }
1191 /**
1192 Return the preferred vector for \a o, made from (in order of preference) its current vector,
1193 current fill or stroke color, or from desktop style if \a o is NULL or doesn't have style.
1194 */
1195 SPGradient *
1196 sp_gradient_vector_for_object(SPDocument *const doc, SPDesktop *const desktop,
1197 SPObject *const o, bool const is_fill)
1198 {
1199 guint32 rgba = 0;
1200 if (o == NULL || SP_OBJECT_STYLE(o) == NULL) {
1201 rgba = sp_desktop_get_color(desktop, is_fill);
1202 } else {
1203 // take the color of the object
1204 SPStyle const &style = *SP_OBJECT_STYLE(o);
1205 SPIPaint const &paint = ( is_fill
1206 ? style.fill
1207 : style.stroke );
1208 if (paint.type == SP_PAINT_TYPE_COLOR) {
1209 rgba = sp_color_get_rgba32_ualpha(&paint.value.color, 0xff);
1210 } else if (paint.type == SP_PAINT_TYPE_PAINTSERVER) {
1211 SPObject *server = is_fill? SP_OBJECT_STYLE_FILL_SERVER(o) : SP_OBJECT_STYLE_STROKE_SERVER(o);
1212 if (SP_IS_GRADIENT (server)) {
1213 return sp_gradient_get_vector(SP_GRADIENT (server), TRUE);
1214 } else {
1215 rgba = sp_desktop_get_color(desktop, is_fill);
1216 }
1217 } else {
1218 // if o doesn't use flat color, then take current color of the desktop.
1219 rgba = sp_desktop_get_color(desktop, is_fill);
1220 }
1221 }
1223 return sp_document_default_gradient_vector(doc, rgba);
1224 }
1227 SPGradient *
1228 sp_gradient_get_forked_vector_if_necessary(SPGradient *gradient, bool force_vector)
1229 {
1230 SPGradient *vector = sp_gradient_get_vector (gradient, force_vector);
1231 vector = sp_gradient_fork_vector_if_necessary (vector);
1232 if ( gradient != vector && gradient->ref->getObject() != vector ) {
1233 sp_gradient_repr_set_link(SP_OBJECT_REPR(gradient), vector);
1234 }
1235 return vector;
1236 }
1238 /*
1239 Local Variables:
1240 mode:c++
1241 c-file-style:"stroustrup"
1242 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1243 indent-tabs-mode:nil
1244 fill-column:99
1245 End:
1246 */
1247 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :