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::Rect const bbox = item->invokeBbox(NR::identity()); // we need "true" bbox without item_i2d_affine
263 NR::Coord const width = bbox.dimensions()[NR::X];
264 NR::Coord const height = bbox.dimensions()[NR::Y];
265 g_assert(width > 0 && height > 0);
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[256];
284 if (sp_svg_transform_write(c, 256, gr->gradientTransform)) {
285 SP_OBJECT_REPR(gr)->setAttribute("gradientTransform", c);
286 } else {
287 SP_OBJECT_REPR(gr)->setAttribute("gradientTransform", NULL);
288 }
289 }
290 } else {
291 sp_repr_set_svg_double(repr, "x1", (center - NR::Point(width/2, 0))[NR::X]);
292 sp_repr_set_svg_double(repr, "y1", (center - NR::Point(width/2, 0))[NR::Y]);
293 sp_repr_set_svg_double(repr, "x2", (center + NR::Point(width/2, 0))[NR::X]);
294 sp_repr_set_svg_double(repr, "y2", (center + NR::Point(width/2, 0))[NR::Y]);
295 }
297 // set the gradientUnits
298 repr->setAttribute("gradientUnits", "userSpaceOnUse");
300 return gr;
301 }
303 /**
304 * Convert an item's gradient to userspace if necessary, also fork it if necessary.
305 * @return The new gradient.
306 */
307 SPGradient *
308 sp_gradient_convert_to_userspace(SPGradient *gr, SPItem *item, gchar const *property)
309 {
310 g_return_val_if_fail(SP_IS_GRADIENT(gr), NULL);
312 // First, fork it if it is shared
313 gr = sp_gradient_fork_private_if_necessary(gr, sp_gradient_get_vector(gr, FALSE),
314 SP_IS_RADIALGRADIENT(gr) ? SP_GRADIENT_TYPE_RADIAL : SP_GRADIENT_TYPE_LINEAR, SP_OBJECT(item));
316 if (gr->units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX) {
318 Inkscape::XML::Node *repr = SP_OBJECT_REPR(gr);
320 // calculate the bbox of the item
321 sp_document_ensure_up_to_date(SP_OBJECT_DOCUMENT(item));
322 NR::Rect const bbox = item->invokeBbox(NR::identity()); // we need "true" bbox without item_i2d_affine
323 NR::Matrix bbox2user(bbox.dimensions()[NR::X], 0,
324 0, bbox.dimensions()[NR::Y],
325 bbox.min()[NR::X], bbox.min()[NR::Y]);
327 /* skew is the additional transform, defined by the proportions of the item, that we need
328 * to apply to the gradient in order to work around this weird bit from SVG 1.1
329 * (http://www.w3.org/TR/SVG11/pservers.html#LinearGradients):
330 *
331 * When gradientUnits="objectBoundingBox" and gradientTransform is the identity
332 * matrix, the stripes of the linear gradient are perpendicular to the gradient
333 * vector in object bounding box space (i.e., the abstract coordinate system where
334 * (0,0) is at the top/left of the object bounding box and (1,1) is at the
335 * bottom/right of the object bounding box). When the object's bounding box is not
336 * square, the stripes that are conceptually perpendicular to the gradient vector
337 * within object bounding box space will render non-perpendicular relative to the
338 * gradient vector in user space due to application of the non-uniform scaling
339 * transformation from bounding box space to user space.
340 */
341 NR::Matrix skew = bbox2user;
342 double exp = skew.expansion();
343 skew[0] /= exp;
344 skew[1] /= exp;
345 skew[2] /= exp;
346 skew[3] /= exp;
347 skew[4] = 0;
348 skew[5] = 0;
350 // apply skew to the gradient
351 gr->gradientTransform = skew;
352 {
353 gchar c[256];
354 if (sp_svg_transform_write(c, 256, gr->gradientTransform)) {
355 SP_OBJECT_REPR(gr)->setAttribute("gradientTransform", c);
356 } else {
357 SP_OBJECT_REPR(gr)->setAttribute("gradientTransform", NULL);
358 }
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[256];
427 if (sp_svg_transform_write(c, 256, gradient->gradientTransform)) {
428 SP_OBJECT_REPR(gradient)->setAttribute("gradientTransform", c);
429 } else {
430 SP_OBJECT_REPR(gradient)->setAttribute("gradientTransform", NULL);
431 }
432 }
434 SPGradient *
435 sp_item_gradient (SPItem *item, bool fill_or_stroke)
436 {
437 SPStyle *style = SP_OBJECT_STYLE (item);
438 SPGradient *gradient = NULL;
440 if (fill_or_stroke) {
441 if (style && (style->fill.type == SP_PAINT_TYPE_PAINTSERVER)) {
442 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER(item);
443 if (SP_IS_GRADIENT (server)) {
444 gradient = SP_GRADIENT (server);
445 }
446 }
447 } else {
448 if (style && (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)) {
449 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER(item);
450 if (SP_IS_GRADIENT (server)) {
451 gradient = SP_GRADIENT (server);
452 }
453 }
454 }
456 return gradient;
457 }
460 SPStop*
461 sp_first_stop(SPGradient *gradient)
462 {
463 for (SPObject *ochild = sp_object_first_child(gradient); ochild != NULL; ochild = SP_OBJECT_NEXT(ochild)) {
464 if (SP_IS_STOP (ochild))
465 return SP_STOP(ochild);
466 }
467 return NULL;
468 }
470 SPStop*
471 sp_prev_stop(SPStop *stop, SPGradient *gradient)
472 {
473 if (sp_object_first_child(SP_OBJECT(gradient)) == SP_OBJECT(stop))
474 return NULL;
475 SPObject *found = NULL;
476 for ( SPObject *ochild = sp_object_first_child(SP_OBJECT(gradient)) ; ochild != NULL ; ochild = SP_OBJECT_NEXT(ochild) ) {
477 if (SP_IS_STOP (ochild)) {
478 found = ochild;
479 }
480 if (SP_OBJECT_NEXT(ochild) == SP_OBJECT(stop) || SP_OBJECT(ochild) == SP_OBJECT(stop)) {
481 break;
482 }
483 }
484 return SP_STOP(found);
485 }
487 SPStop*
488 sp_next_stop(SPStop *stop)
489 {
490 for (SPObject *ochild = SP_OBJECT_NEXT(stop); ochild != NULL; ochild = SP_OBJECT_NEXT(ochild)) {
491 if (SP_IS_STOP (ochild))
492 return SP_STOP(ochild);
493 }
494 return NULL;
495 }
497 SPStop*
498 sp_last_stop(SPGradient *gradient)
499 {
500 for (SPStop *stop = sp_first_stop (gradient); stop != NULL; stop = sp_next_stop (stop)) {
501 if (sp_next_stop (stop) == NULL)
502 return stop;
503 }
504 return NULL;
505 }
507 SPStop*
508 sp_get_stop_i(SPGradient *gradient, guint stop_i)
509 {
510 SPStop *stop = sp_first_stop (gradient);
512 for (guint i=0; i < stop_i; i++) {
513 if (!stop) return NULL;
514 stop = sp_next_stop (stop);
515 }
517 return stop;
518 }
521 void
522 sp_item_gradient_edit_stop (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
523 {
524 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
526 if (!gradient || !SP_IS_GRADIENT(gradient))
527 return;
529 SPGradient *vector = sp_gradient_get_vector (gradient, false);
530 switch (point_type) {
531 case POINT_LG_BEGIN:
532 case POINT_RG_CENTER:
533 case POINT_RG_FOCUS:
534 {
535 GtkWidget *dialog = sp_gradient_vector_editor_new (vector, sp_first_stop (vector));
536 gtk_widget_show (dialog);
537 }
538 break;
540 case POINT_LG_END:
541 case POINT_RG_R1:
542 case POINT_RG_R2:
543 {
544 GtkWidget *dialog = sp_gradient_vector_editor_new (vector, sp_last_stop (vector));
545 gtk_widget_show (dialog);
546 }
547 break;
549 case POINT_LG_MID:
550 case POINT_RG_MID1:
551 case POINT_RG_MID2:
552 {
553 GtkWidget *dialog = sp_gradient_vector_editor_new (vector, sp_get_stop_i (vector, point_i));
554 gtk_widget_show (dialog);
555 }
556 break;
557 default:
558 break;
559 }
560 }
562 guint32
563 sp_item_gradient_stop_query_style (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
564 {
565 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
567 if (!gradient || !SP_IS_GRADIENT(gradient))
568 return 0;
570 SPGradient *vector = sp_gradient_get_vector (gradient, false);
572 if (!vector) // orphan!
573 return 0; // what else to do?
575 switch (point_type) {
576 case POINT_LG_BEGIN:
577 case POINT_RG_CENTER:
578 case POINT_RG_FOCUS:
579 {
580 SPStop *first = sp_first_stop (vector);
581 if (first) {
582 return sp_stop_get_rgba32(first);
583 }
584 }
585 break;
587 case POINT_LG_END:
588 case POINT_RG_R1:
589 case POINT_RG_R2:
590 {
591 SPStop *last = sp_last_stop (vector);
592 if (last) {
593 return sp_stop_get_rgba32(last);
594 }
595 }
596 break;
598 case POINT_LG_MID:
599 case POINT_RG_MID1:
600 case POINT_RG_MID2:
601 {
602 SPStop *stopi = sp_get_stop_i (vector, point_i);
603 if (stopi) {
604 return sp_stop_get_rgba32(stopi);
605 }
606 }
607 break;
609 default:
610 break;
611 }
612 return 0;
613 }
615 void
616 sp_item_gradient_stop_set_style (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke, SPCSSAttr *stop)
617 {
618 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
620 if (!gradient || !SP_IS_GRADIENT(gradient))
621 return;
623 SPGradient *vector = sp_gradient_get_vector (gradient, false);
625 if (!vector) // orphan!
626 return;
628 vector = sp_gradient_fork_vector_if_necessary (vector);
629 if ( gradient != vector && gradient->ref->getObject() != vector ) {
630 sp_gradient_repr_set_link(SP_OBJECT_REPR(gradient), vector);
631 }
633 switch (point_type) {
634 case POINT_LG_BEGIN:
635 case POINT_RG_CENTER:
636 case POINT_RG_FOCUS:
637 {
638 SPStop *first = sp_first_stop (vector);
639 if (first) {
640 sp_repr_css_change (SP_OBJECT_REPR (first), stop, "style");
641 }
642 }
643 break;
645 case POINT_LG_END:
646 case POINT_RG_R1:
647 case POINT_RG_R2:
648 {
649 SPStop *last = sp_last_stop (vector);
650 if (last) {
651 sp_repr_css_change (SP_OBJECT_REPR (last), stop, "style");
652 }
653 }
654 break;
656 case POINT_LG_MID:
657 case POINT_RG_MID1:
658 case POINT_RG_MID2:
659 {
660 SPStop *stopi = sp_get_stop_i (vector, point_i);
661 if (stopi) {
662 sp_repr_css_change (SP_OBJECT_REPR (stopi), stop, "style");
663 }
664 }
665 break;
667 default:
668 break;
669 }
670 }
672 void
673 sp_item_gradient_reverse_vector (SPItem *item, bool fill_or_stroke)
674 {
675 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
676 if (!gradient || !SP_IS_GRADIENT(gradient))
677 return;
679 SPGradient *vector = sp_gradient_get_vector (gradient, false);
680 if (!vector) // orphan!
681 return;
683 vector = sp_gradient_fork_vector_if_necessary (vector);
684 if ( gradient != vector && gradient->ref->getObject() != vector ) {
685 sp_gradient_repr_set_link(SP_OBJECT_REPR(gradient), vector);
686 }
688 GSList *child_reprs = NULL;
689 GSList *child_objects = NULL;
690 std::vector<double> offsets;
691 for (SPObject *child = sp_object_first_child(vector);
692 child != NULL; child = SP_OBJECT_NEXT(child)) {
693 child_reprs = g_slist_prepend (child_reprs, SP_OBJECT_REPR(child));
694 child_objects = g_slist_prepend (child_objects, child);
695 offsets.push_back(sp_repr_get_double_attribute(SP_OBJECT_REPR(child), "offset", 0));
696 }
698 GSList *child_copies = NULL;
699 for (GSList *i = child_reprs; i != NULL; i = i->next) {
700 Inkscape::XML::Node *repr = (Inkscape::XML::Node *) i->data;
701 child_copies = g_slist_append (child_copies, repr->duplicate());
702 }
705 for (GSList *i = child_objects; i != NULL; i = i->next) {
706 SPObject *child = SP_OBJECT (i->data);
707 child->deleteObject();
708 }
710 std::vector<double>::iterator iter = offsets.end() - 1;
711 for (GSList *i = child_copies; i != NULL; i = i->next) {
712 Inkscape::XML::Node *copy = (Inkscape::XML::Node *) i->data;
713 vector->appendChildRepr(copy);
714 sp_repr_set_svg_double (copy, "offset", 1 - *iter);
715 iter --;
716 Inkscape::GC::release(copy);
717 }
719 g_slist_free (child_reprs);
720 g_slist_free (child_copies);
721 g_slist_free (child_objects);
722 }
725 // FIXME: make general global function
726 static double
727 get_offset_between_points (NR::Point p, NR::Point begin, NR::Point end)
728 {
729 double length = NR::L2(end - begin);
730 NR::Point be = (end - begin) / length;
731 double r = NR::dot(p - begin, be);
733 if (r < 0.0) return 0.0;
734 if (r > length) return 1.0;
736 return (r / length);
737 }
740 /**
741 Set the position of point point_type of the gradient applied to item (either fill_or_stroke) to
742 p_w (in desktop coordinates). Write_repr if you want the change to become permanent.
743 */
744 void
745 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)
746 {
747 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
749 if (!gradient || !SP_IS_GRADIENT(gradient))
750 return;
752 gradient = sp_gradient_convert_to_userspace (gradient, item, fill_or_stroke? "fill" : "stroke");
754 NR::Matrix i2d = sp_item_i2d_affine (item);
755 NR::Point p = p_w * i2d.inverse();
756 p *= (gradient->gradientTransform).inverse();
757 // now p is in gradient's original coordinates
759 Inkscape::XML::Node *repr = SP_OBJECT_REPR(gradient);
761 if (SP_IS_LINEARGRADIENT(gradient)) {
762 SPLinearGradient *lg = SP_LINEARGRADIENT(gradient);
763 switch (point_type) {
764 case POINT_LG_BEGIN:
765 if (scale) {
766 lg->x2.computed += (lg->x1.computed - p[NR::X]);
767 lg->y2.computed += (lg->y1.computed - p[NR::Y]);
768 }
769 lg->x1.computed = p[NR::X];
770 lg->y1.computed = p[NR::Y];
771 if (write_repr) {
772 if (scale) {
773 sp_repr_set_svg_double(repr, "x2", lg->x2.computed);
774 sp_repr_set_svg_double(repr, "y2", lg->y2.computed);
775 }
776 sp_repr_set_svg_double(repr, "x1", lg->x1.computed);
777 sp_repr_set_svg_double(repr, "y1", lg->y1.computed);
778 } else {
779 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
780 }
781 break;
782 case POINT_LG_END:
783 if (scale) {
784 lg->x1.computed += (lg->x2.computed - p[NR::X]);
785 lg->y1.computed += (lg->y2.computed - p[NR::Y]);
786 }
787 lg->x2.computed = p[NR::X];
788 lg->y2.computed = p[NR::Y];
789 if (write_repr) {
790 if (scale) {
791 sp_repr_set_svg_double(repr, "x1", lg->x1.computed);
792 sp_repr_set_svg_double(repr, "y1", lg->y1.computed);
793 }
794 sp_repr_set_svg_double(repr, "x2", lg->x2.computed);
795 sp_repr_set_svg_double(repr, "y2", lg->y2.computed);
796 } else {
797 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
798 }
799 break;
800 case POINT_LG_MID:
801 {
802 // using X-coordinates only to determine the offset, assuming p has been snapped to the vector from begin to end.
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 lg->vector.stops.at(point_i).offset = offset;
805 SPGradient *vector = sp_gradient_get_vector (lg, false);
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 (gradient)->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 rg->vector.stops.at(point_i).offset = offset;
899 SPGradient *vector = sp_gradient_get_vector (rg, false);
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 rg->vector.stops.at(point_i).offset = offset;
914 SPGradient *vector = sp_gradient_get_vector (rg, false);
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[256];
929 if (sp_svg_transform_write(s, 256, gradient->gradientTransform)) {
930 SP_OBJECT_REPR(gradient)->setAttribute("gradientTransform", s);
931 } else {
932 SP_OBJECT_REPR(gradient)->setAttribute("gradientTransform", NULL);
933 }
934 } else {
935 SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
936 }
937 }
938 }
939 }
941 SPGradient *
942 sp_item_gradient_get_vector (SPItem *item, bool fill_or_stroke)
943 {
944 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
946 if (gradient)
947 return sp_gradient_get_vector (gradient, false);
948 return NULL;
949 }
951 SPGradientSpread
952 sp_item_gradient_get_spread (SPItem *item, bool fill_or_stroke)
953 {
954 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
956 if (gradient)
957 return sp_gradient_get_spread (gradient);
958 return SP_GRADIENT_SPREAD_PAD;
959 }
962 /**
963 Returns the position of point point_type of the gradient applied to item (either fill_or_stroke),
964 in desktop coordinates.
965 */
967 NR::Point
968 sp_item_gradient_get_coords (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
969 {
970 SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
972 NR::Point p (0, 0);
974 if (!gradient)
975 return p;
977 if (SP_IS_LINEARGRADIENT(gradient)) {
978 SPLinearGradient *lg = SP_LINEARGRADIENT(gradient);
979 switch (point_type) {
980 case POINT_LG_BEGIN:
981 p = NR::Point (lg->x1.computed, lg->y1.computed);
982 break;
983 case POINT_LG_END:
984 p = NR::Point (lg->x2.computed, lg->y2.computed);
985 break;
986 case POINT_LG_MID:
987 {
988 gdouble offset = lg->vector.stops.at(point_i).offset;
989 p = (1-offset) * NR::Point(lg->x1.computed, lg->y1.computed) + offset * NR::Point(lg->x2.computed, lg->y2.computed);
990 }
991 break;
992 }
993 } else if (SP_IS_RADIALGRADIENT(gradient)) {
994 SPRadialGradient *rg = SP_RADIALGRADIENT(gradient);
995 switch (point_type) {
996 case POINT_RG_CENTER:
997 p = NR::Point (rg->cx.computed, rg->cy.computed);
998 break;
999 case POINT_RG_FOCUS:
1000 p = NR::Point (rg->fx.computed, rg->fy.computed);
1001 break;
1002 case POINT_RG_R1:
1003 p = NR::Point (rg->cx.computed + rg->r.computed, rg->cy.computed);
1004 break;
1005 case POINT_RG_R2:
1006 p = NR::Point (rg->cx.computed, rg->cy.computed - rg->r.computed);
1007 break;
1008 case POINT_RG_MID1:
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->r.computed, rg->cy.computed);
1012 }
1013 break;
1014 case POINT_RG_MID2:
1015 {
1016 gdouble offset = rg->vector.stops.at(point_i).offset;
1017 p = (1-offset) * NR::Point (rg->cx.computed, rg->cy.computed) + offset * NR::Point(rg->cx.computed, rg->cy.computed - rg->r.computed);
1018 }
1019 break;
1020 }
1021 }
1023 if (SP_GRADIENT(gradient)->units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX) {
1024 sp_document_ensure_up_to_date(SP_OBJECT_DOCUMENT(item));
1025 NR::Rect const bbox = item->invokeBbox(NR::identity()); // we need "true" bbox without item_i2d_affine
1026 p *= NR::Matrix(bbox.dimensions()[NR::X], 0,
1027 0, bbox.dimensions()[NR::Y],
1028 bbox.min()[NR::X], bbox.min()[NR::Y]);
1029 }
1030 p *= NR::Matrix(gradient->gradientTransform) * sp_item_i2d_affine(item);
1031 return p;
1032 }
1035 /**
1036 * Sets item fill or stroke to the gradient of the specified type with given vector, creating
1037 * new private gradient, if needed.
1038 * gr has to be a normalized vector.
1039 */
1041 SPGradient *
1042 sp_item_set_gradient(SPItem *item, SPGradient *gr, SPGradientType type, bool is_fill)
1043 {
1044 g_return_val_if_fail(item != NULL, NULL);
1045 g_return_val_if_fail(SP_IS_ITEM(item), NULL);
1046 g_return_val_if_fail(gr != NULL, NULL);
1047 g_return_val_if_fail(SP_IS_GRADIENT(gr), NULL);
1048 g_return_val_if_fail(gr->state == SP_GRADIENT_STATE_VECTOR, NULL);
1050 SPStyle *style = SP_OBJECT_STYLE(item);
1051 g_assert(style != NULL);
1053 guint style_type = is_fill? style->fill.type : style->stroke.type;
1054 SPPaintServer *ps = NULL;
1055 if (style_type == SP_PAINT_TYPE_PAINTSERVER)
1056 ps = is_fill? SP_STYLE_FILL_SERVER(style) : SP_STYLE_STROKE_SERVER(style);
1058 if (ps
1059 && ( (type == SP_GRADIENT_TYPE_LINEAR && SP_IS_LINEARGRADIENT(ps)) ||
1060 (type == SP_GRADIENT_TYPE_RADIAL && SP_IS_RADIALGRADIENT(ps)) ) )
1061 {
1063 /* Current fill style is the gradient of the required type */
1064 SPGradient *current = SP_GRADIENT(ps);
1066 //g_print("hrefcount %d count %d\n", SP_OBJECT_HREFCOUNT(ig), count_gradient_hrefs(SP_OBJECT(item), ig));
1068 if (SP_OBJECT_HREFCOUNT(current) == 1 ||
1069 SP_OBJECT_HREFCOUNT(current) == count_gradient_hrefs(SP_OBJECT(item), current)) {
1071 // current is private and it's either used once, or all its uses are by children of item;
1072 // so just change its href to vector
1074 if ( current != gr && sp_gradient_get_vector(current, false) != gr ) {
1075 /* href is not the vector */
1076 sp_gradient_repr_set_link(SP_OBJECT_REPR(current), gr);
1077 }
1078 SP_OBJECT(item)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
1079 return current;
1081 } else {
1083 // the gradient is not private, or it is shared with someone else;
1084 // normalize it (this includes creating new private if necessary)
1085 SPGradient *normalized = sp_gradient_fork_private_if_necessary(current, gr, type, item);
1087 g_return_val_if_fail(normalized != NULL, NULL);
1089 if (normalized != current) {
1091 /* We have to change object style here; recursive because this is used from
1092 * fill&stroke and must work for groups etc. */
1093 sp_style_set_property_url(SP_OBJECT(item), is_fill? "fill" : "stroke", SP_OBJECT(normalized), true);
1094 }
1095 SP_OBJECT(item)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
1096 return normalized;
1097 }
1099 } else {
1100 /* Current fill style is not a gradient or wrong type, so construct everything */
1101 SPGradient *constructed = sp_gradient_get_private_normalized(SP_OBJECT_DOCUMENT(item), gr, type);
1102 constructed = sp_gradient_reset_to_userspace(constructed, item);
1103 sp_style_set_property_url(SP_OBJECT(item), ( is_fill ? "fill" : "stroke" ), SP_OBJECT(constructed), true);
1104 SP_OBJECT(item)->requestDisplayUpdate(( SP_OBJECT_MODIFIED_FLAG |
1105 SP_OBJECT_STYLE_MODIFIED_FLAG ));
1106 return constructed;
1107 }
1108 }
1110 static void
1111 sp_gradient_repr_set_link(Inkscape::XML::Node *repr, SPGradient *link)
1112 {
1113 g_return_if_fail(repr != NULL);
1114 g_return_if_fail(link != NULL);
1115 g_return_if_fail(SP_IS_GRADIENT(link));
1117 gchar *ref;
1118 if (link) {
1119 gchar const *id = SP_OBJECT_ID(link);
1120 size_t const len = strlen(id);
1121 ref = (gchar*) alloca(len + 2);
1122 *ref = '#';
1123 memcpy(ref + 1, id, len + 1);
1124 } else {
1125 ref = NULL;
1126 }
1128 repr->setAttribute("xlink:href", ref);
1129 }
1131 /*
1132 * Get default normalized gradient vector of document, create if there is none
1133 */
1135 SPGradient *
1136 sp_document_default_gradient_vector(SPDocument *document, guint32 color)
1137 {
1138 SPDefs *defs = (SPDefs *) SP_DOCUMENT_DEFS(document);
1139 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(document);
1141 Inkscape::XML::Node *repr = xml_doc->createElement("svg:linearGradient");
1143 repr->setAttribute("inkscape:collect", "always");
1144 // set here, but removed when it's edited in the gradient editor
1145 // to further reduce clutter, we could
1146 // (1) here, search gradients by color and return what is found without duplication
1147 // (2) in fill & stroke, show only one copy of each gradient in list
1149 Inkscape::XML::Node *stop = xml_doc->createElement("svg:stop");
1151 gchar b[64];
1152 sp_svg_write_color(b, 64, color);
1154 {
1155 gchar *t = g_strdup_printf("stop-color:%s;stop-opacity:1;", b);
1156 stop->setAttribute("style", t);
1157 g_free(t);
1158 }
1160 stop->setAttribute("offset", "0");
1162 repr->appendChild(stop);
1163 Inkscape::GC::release(stop);
1165 stop = xml_doc->createElement("svg:stop");
1167 {
1168 gchar *t = g_strdup_printf("stop-color:%s;stop-opacity:0;", b);
1169 stop->setAttribute("style", t);
1170 g_free(t);
1171 }
1173 stop->setAttribute("offset", "1");
1175 repr->appendChild(stop);
1176 Inkscape::GC::release(stop);
1178 SP_OBJECT_REPR(defs)->addChild(repr, NULL);
1179 Inkscape::GC::release(repr);
1181 /* fixme: This does not look like nice */
1182 SPGradient *gr;
1183 gr = (SPGradient *) document->getObjectByRepr(repr);
1184 g_assert(gr != NULL);
1185 g_assert(SP_IS_GRADIENT(gr));
1186 /* fixme: Maybe add extra sanity check here */
1187 gr->state = SP_GRADIENT_STATE_VECTOR;
1189 return gr;
1190 }
1192 /**
1193 Return the preferred vector for \a o, made from (in order of preference) its current vector,
1194 current fill or stroke color, or from desktop style if \a o is NULL or doesn't have style.
1195 */
1196 SPGradient *
1197 sp_gradient_vector_for_object(SPDocument *const doc, SPDesktop *const desktop,
1198 SPObject *const o, bool const is_fill)
1199 {
1200 guint32 rgba = 0;
1201 if (o == NULL || SP_OBJECT_STYLE(o) == NULL) {
1202 rgba = sp_desktop_get_color(desktop, is_fill);
1203 } else {
1204 // take the color of the object
1205 SPStyle const &style = *SP_OBJECT_STYLE(o);
1206 SPIPaint const &paint = ( is_fill
1207 ? style.fill
1208 : style.stroke );
1209 if (paint.type == SP_PAINT_TYPE_COLOR) {
1210 rgba = sp_color_get_rgba32_ualpha(&paint.value.color, 0xff);
1211 } else if (paint.type == SP_PAINT_TYPE_PAINTSERVER) {
1212 SPObject *server = is_fill? SP_OBJECT_STYLE_FILL_SERVER(o) : SP_OBJECT_STYLE_STROKE_SERVER(o);
1213 if (SP_IS_GRADIENT (server)) {
1214 return sp_gradient_get_vector(SP_GRADIENT (server), TRUE);
1215 } else {
1216 rgba = sp_desktop_get_color(desktop, is_fill);
1217 }
1218 } else {
1219 // if o doesn't use flat color, then take current color of the desktop.
1220 rgba = sp_desktop_get_color(desktop, is_fill);
1221 }
1222 }
1224 return sp_document_default_gradient_vector(doc, rgba);
1225 }
1228 SPGradient *
1229 sp_gradient_get_forked_vector_if_necessary(SPGradient *gradient, bool force_vector)
1230 {
1231 SPGradient *vector = sp_gradient_get_vector (gradient, force_vector);
1232 vector = sp_gradient_fork_vector_if_necessary (vector);
1233 if ( gradient != vector && gradient->ref->getObject() != vector ) {
1234 sp_gradient_repr_set_link(SP_OBJECT_REPR(gradient), vector);
1235 }
1236 return vector;
1237 }
1239 /*
1240 Local Variables:
1241 mode:c++
1242 c-file-style:"stroustrup"
1243 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1244 indent-tabs-mode:nil
1245 fill-column:99
1246 End:
1247 */
1248 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :