src/display/nr-arena-shape.cpp

   1 #define __NR_ARENA_SHAPE_C__
   2
   3 /*
   4  * RGBA display list system for inkscape
   5  *
   6  * Author:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *
   9  * Copyright (C) 2001-2002 Lauris Kaplinski
  10  * Copyright (C) 2001 Ximian, Inc.
  11  *
  12  * Released under GNU GPL, read the file 'COPYING' for more information
  13  */
  14
  15 #include <2geom/svg-path.h>
  16 #include <2geom/svg-path-parser.h>
  17 #include <display/canvas-arena.h>
  18 #include <display/nr-arena.h>
  19 #include <display/nr-arena-shape.h>
  20 #include "display/curve.h"
  21 #include <libnr/nr-pixops.h>
  22 #include <libnr/nr-blit.h>
  23 #include <libnr/nr-convert2geom.h>
  24 #include <2geom/pathvector.h>
  25 #include <2geom/curves.h>
  26 #include <livarot/Path.h>
  27 #include <livarot/float-line.h>
  28 #include <livarot/int-line.h>
  29 #include <style.h>
  30 #include "inkscape-cairo.h"
  31 #include "helper/geom.h"
  32 #include "helper/geom-curves.h"
  33 #include "sp-filter.h"
  34 #include "sp-filter-reference.h"
  35 #include "display/nr-filter.h"
  36 #include <typeinfo>
  37 #include <cairo.h>
  38
  39 #include <glib.h>
  40 #include "svg/svg.h"
  41 #include <fenv.h>
  42
  43 //int  showRuns=0;
  44 void nr_pixblock_render_shape_mask_or(NRPixBlock &m,Shape* theS);
  45
  46 static void nr_arena_shape_class_init(NRArenaShapeClass *klass);
  47 static void nr_arena_shape_init(NRArenaShape *shape);
  48 static void nr_arena_shape_finalize(NRObject *object);
  49
  50 static NRArenaItem *nr_arena_shape_children(NRArenaItem *item);
  51 static void nr_arena_shape_add_child(NRArenaItem *item, NRArenaItem *child, NRArenaItem *ref);
  52 static void nr_arena_shape_remove_child(NRArenaItem *item, NRArenaItem *child);
  53 static void nr_arena_shape_set_child_position(NRArenaItem *item, NRArenaItem *child, NRArenaItem *ref);
  54
  55 static guint nr_arena_shape_update(NRArenaItem *item, NRRectL *area, NRGC *gc, guint state, guint reset);
  56 static unsigned int nr_arena_shape_render(cairo_t *ct, NRArenaItem *item, NRRectL *area, NRPixBlock *pb, unsigned int flags);
  57 static guint nr_arena_shape_clip(NRArenaItem *item, NRRectL *area, NRPixBlock *pb);
  58 static NRArenaItem *nr_arena_shape_pick(NRArenaItem *item, Geom::Point p, double delta, unsigned int sticky);
  59
  60 static NRArenaItemClass *shape_parent_class;
  61
  62 NRType
  63 nr_arena_shape_get_type(void)
  64 {
  65     static NRType type = 0;
  66     if (!type) {
  67         type = nr_object_register_type(NR_TYPE_ARENA_ITEM,
  68                                        "NRArenaShape",
  69                                        sizeof(NRArenaShapeClass),
  70                                        sizeof(NRArenaShape),
  71                                        (void (*)(NRObjectClass *)) nr_arena_shape_class_init,
  72                                        (void (*)(NRObject *)) nr_arena_shape_init);
  73     }
  74     return type;
  75 }
  76
  77 static void
  78 nr_arena_shape_class_init(NRArenaShapeClass *klass)
  79 {
  80     NRObjectClass *object_class;
  81     NRArenaItemClass *item_class;
  82
  83     object_class = (NRObjectClass *) klass;
  84     item_class = (NRArenaItemClass *) klass;
  85
  86     shape_parent_class = (NRArenaItemClass *)  ((NRObjectClass *) klass)->parent;
  87
  88     object_class->finalize = nr_arena_shape_finalize;
  89     object_class->cpp_ctor = NRObject::invoke_ctor<NRArenaShape>;
  90
  91     item_class->children = nr_arena_shape_children;
  92     item_class->add_child = nr_arena_shape_add_child;
  93     item_class->set_child_position = nr_arena_shape_set_child_position;
  94     item_class->remove_child = nr_arena_shape_remove_child;
  95     item_class->update = nr_arena_shape_update;
  96     item_class->render = nr_arena_shape_render;
  97     item_class->clip = nr_arena_shape_clip;
  98     item_class->pick = nr_arena_shape_pick;
  99 }
 100
 101 /**
 102  * Initializes the arena shape, setting all parameters to null, 0, false,
 103  * or other defaults
 104  */
 105 static void
 106 nr_arena_shape_init(NRArenaShape *shape)
 107 {
 108     shape->curve = NULL;
 109     shape->style = NULL;
 110     shape->paintbox.x0 = shape->paintbox.y0 = 0.0F;
 111     shape->paintbox.x1 = shape->paintbox.y1 = 256.0F;
 112
 113     shape->ctm.setIdentity();
 114     shape->fill_painter = NULL;
 115     shape->stroke_painter = NULL;
 116     shape->cached_fill = NULL;
 117     shape->cached_stroke = NULL;
 118     shape->cached_fpartialy = false;
 119     shape->cached_spartialy = false;
 120     shape->fill_shp = NULL;
 121     shape->stroke_shp = NULL;
 122
 123     shape->delayed_shp = false;
 124
 125     shape->approx_bbox.x0 = shape->approx_bbox.y0 = 0;
 126     shape->approx_bbox.x1 = shape->approx_bbox.y1 = 0;
 127     shape->cached_fctm.setIdentity();
 128     shape->cached_sctm.setIdentity();
 129
 130     shape->markers = NULL;
 131
 132     shape->last_pick = NULL;
 133     shape->repick_after = 0;
 134 }
 135
 136 static void
 137 nr_arena_shape_finalize(NRObject *object)
 138 {
 139     NRArenaShape *shape = (NRArenaShape *) object;
 140
 141     if (shape->fill_shp) delete shape->fill_shp;
 142     if (shape->stroke_shp) delete shape->stroke_shp;
 143     if (shape->cached_fill) delete shape->cached_fill;
 144     if (shape->cached_stroke) delete shape->cached_stroke;
 145     if (shape->fill_painter) sp_painter_free(shape->fill_painter);
 146     if (shape->stroke_painter) sp_painter_free(shape->stroke_painter);
 147
 148     if (shape->style) sp_style_unref(shape->style);
 149     if (shape->curve) shape->curve->unref();
 150
 151     ((NRObjectClass *) shape_parent_class)->finalize(object);
 152 }
 153
 154 /**
 155  * Retrieves the markers from the item
 156  */
 157 static NRArenaItem *
 158 nr_arena_shape_children(NRArenaItem *item)
 159 {
 160     NRArenaShape *shape = (NRArenaShape *) item;
 161
 162     return shape->markers;
 163 }
 164
 165 /**
 166  * Attaches child to item, and if ref is not NULL, sets it and ref->next as
 167  * the prev and next items.  If ref is NULL, then it sets the item's markers
 168  * as the next items.
 169  */
 170 static void
 171 nr_arena_shape_add_child(NRArenaItem *item, NRArenaItem *child, NRArenaItem *ref)
 172 {
 173     NRArenaShape *shape = (NRArenaShape *) item;
 174
 175     if (!ref) {
 176         shape->markers = nr_arena_item_attach(item, child, NULL, shape->markers);
 177     } else {
 178         ref->next = nr_arena_item_attach(item, child, ref, ref->next);
 179     }
 180
 181     nr_arena_item_request_update(item, NR_ARENA_ITEM_STATE_ALL, FALSE);
 182 }
 183
 184 /**
 185  * Removes child from the shape.  If there are no prev items in
 186  * the child, it sets items' markers to the next item in the child.
 187  */
 188 static void
 189 nr_arena_shape_remove_child(NRArenaItem *item, NRArenaItem *child)
 190 {
 191     NRArenaShape *shape = (NRArenaShape *) item;
 192
 193     if (child->prev) {
 194         nr_arena_item_detach(item, child);
 195     } else {
 196         shape->markers = nr_arena_item_detach(item, child);
 197     }
 198
 199     nr_arena_item_request_update(item, NR_ARENA_ITEM_STATE_ALL, FALSE);
 200 }
 201
 202 /**
 203  * Detaches child from item, and if there are no previous items in child, it
 204  * sets item's markers to the child.  It then attaches the child back onto the item.
 205  * If ref is null, it sets the markers to be the next item, otherwise it uses
 206  * the next/prev items in ref.
 207  */
 208 static void
 209 nr_arena_shape_set_child_position(NRArenaItem *item, NRArenaItem *child, NRArenaItem *ref)
 210 {
 211     NRArenaShape *shape = (NRArenaShape *) item;
 212
 213     if (child->prev) {
 214         nr_arena_item_detach(item, child);
 215     } else {
 216         shape->markers = nr_arena_item_detach(item, child);
 217     }
 218
 219     if (!ref) {
 220         shape->markers = nr_arena_item_attach(item, child, NULL, shape->markers);
 221     } else {
 222         ref->next = nr_arena_item_attach(item, child, ref, ref->next);
 223     }
 224
 225     nr_arena_item_request_render(child);
 226 }
 227
 228 void nr_arena_shape_update_stroke(NRArenaShape *shape, NRGC* gc, NRRectL *area);
 229 void nr_arena_shape_update_fill(NRArenaShape *shape, NRGC *gc, NRRectL *area, bool force_shape = false);
 230 void nr_arena_shape_add_bboxes(NRArenaShape* shape, Geom::OptRect &bbox);
 231
 232 /**
 233  * Updates the arena shape 'item' and all of its children, including the markers.
 234  */
 235 static guint
 236 nr_arena_shape_update(NRArenaItem *item, NRRectL *area, NRGC *gc, guint state, guint reset)
 237 {
 238     Geom::OptRect boundingbox;
 239
 240     NRArenaShape *shape = NR_ARENA_SHAPE(item);
 241
 242     unsigned int beststate = NR_ARENA_ITEM_STATE_ALL;
 243
 244     unsigned int newstate;
 245     for (NRArenaItem *child = shape->markers; child != NULL; child = child->next) {
 246         newstate = nr_arena_item_invoke_update(child, area, gc, state, reset);
 247         beststate = beststate & newstate;
 248     }
 249
 250     if (!(state & NR_ARENA_ITEM_STATE_RENDER)) {
 251         /* We do not have to create rendering structures */
 252         shape->ctm = gc->transform;
 253         if (state & NR_ARENA_ITEM_STATE_BBOX) {
 254             if (shape->curve) {
 255                 boundingbox = bounds_exact_transformed(shape->curve->get_pathvector(), gc->transform);
 256                 /// \todo  just write item->bbox = boundingbox
 257                 if (boundingbox) {
 258                     item->bbox.x0 = (gint32)((*boundingbox)[0][0] - 1.0F);
 259                     item->bbox.y0 = (gint32)((*boundingbox)[1][0] - 1.0F);
 260                     item->bbox.x1 = (gint32)((*boundingbox)[0][1] + 1.9999F);
 261                     item->bbox.y1 = (gint32)((*boundingbox)[1][1] + 1.9999F);
 262                 } else {
 263                     item->bbox = NR_RECT_L_EMPTY;
 264                 }
 265             }
 266             if (beststate & NR_ARENA_ITEM_STATE_BBOX) {
 267                 for (NRArenaItem *child = shape->markers; child != NULL; child = child->next) {
 268                     nr_rect_l_union(&item->bbox, &item->bbox, &child->bbox);
 269                 }
 270             }
 271         }
 272         return (state | item->state);
 273     }
 274
 275     shape->delayed_shp=true;
 276     shape->ctm = gc->transform;
 277     boundingbox = Geom::OptRect();
 278
 279     bool outline = (NR_ARENA_ITEM(shape)->arena->rendermode == Inkscape::RENDERMODE_OUTLINE);
 280
 281     if (shape->curve) {
 282         boundingbox = bounds_exact_transformed(shape->curve->get_pathvector(), gc->transform);
 283
 284         if (boundingbox && (shape->_stroke.paint.type() != NRArenaShape::Paint::NONE || outline)) {
 285             float width, scale;
 286             scale = gc->transform.descrim();
 287             width = MAX(0.125, shape->_stroke.width * scale);
 288             if ( fabs(shape->_stroke.width * scale) > 0.01 ) { // sinon c'est 0=oon veut pas de bord
 289                 boundingbox->expandBy(width);
 290             }
 291             // those pesky miters, now
 292             float miterMax=width*shape->_stroke.mitre_limit;
 293             if ( miterMax > 0.01 ) {
 294                 // grunt mode. we should compute the various miters instead (one for each point on the curve)
 295                 boundingbox->expandBy(miterMax);
 296             }
 297         }
 298     }
 299
 300     /// \todo  just write item->bbox = boundingbox
 301     if (boundingbox) {
 302         shape->approx_bbox.x0 = (gint32)((*boundingbox)[0][0] - 1.0F);
 303         shape->approx_bbox.y0 = (gint32)((*boundingbox)[1][0] - 1.0F);
 304         shape->approx_bbox.x1 = (gint32)((*boundingbox)[0][1] + 1.9999F);
 305         shape->approx_bbox.y1 = (gint32)((*boundingbox)[1][1] + 1.9999F);
 306     } else {
 307         shape->approx_bbox = NR_RECT_L_EMPTY;
 308     }
 309     if ( area && nr_rect_l_test_intersect_ptr(area, &shape->approx_bbox) ) shape->delayed_shp=false;
 310
 311     /* Release state data */
 312     if (shape->fill_shp) {
 313         delete shape->fill_shp;
 314         shape->fill_shp = NULL;
 315     }
 316     if (shape->stroke_shp) {
 317         delete shape->stroke_shp;
 318         shape->stroke_shp = NULL;
 319     }
 320     if (shape->fill_painter) {
 321         sp_painter_free(shape->fill_painter);
 322         shape->fill_painter = NULL;
 323     }
 324     if (shape->stroke_painter) {
 325         sp_painter_free(shape->stroke_painter);
 326         shape->stroke_painter = NULL;
 327     }
 328
 329     if (!shape->curve ||
 330         !shape->style ||
 331         shape->curve->is_empty() ||
 332         (( shape->_fill.paint.type() == NRArenaShape::Paint::NONE ) &&
 333          ( shape->_stroke.paint.type() == NRArenaShape::Paint::NONE && !outline) ))
 334     {
 335         item->bbox = shape->approx_bbox;
 336         return NR_ARENA_ITEM_STATE_ALL;
 337     }
 338
 339     /* Build state data */
 340     if ( shape->delayed_shp ) {
 341         item->bbox=shape->approx_bbox;
 342     } else {
 343         nr_arena_shape_update_stroke(shape, gc, area);
 344         nr_arena_shape_update_fill(shape, gc, area);
 345
 346         boundingbox = Geom::OptRect();
 347         nr_arena_shape_add_bboxes(shape, boundingbox);
 348
 349         /// \todo  just write shape->approx_bbox = boundingbox
 350         if (boundingbox) {
 351             shape->approx_bbox.x0 = (gint32)((*boundingbox)[0][0] - 1.0F);
 352             shape->approx_bbox.y0 = (gint32)((*boundingbox)[1][0] - 1.0F);
 353             shape->approx_bbox.x1 = (gint32)((*boundingbox)[0][1] + 1.9999F);
 354             shape->approx_bbox.y1 = (gint32)((*boundingbox)[1][1] + 1.9999F);
 355         } else {
 356             shape->approx_bbox = NR_RECT_L_EMPTY;
 357         }
 358     }
 359
 360     if (!boundingbox)
 361         return NR_ARENA_ITEM_STATE_ALL;
 362
 363     /// \todo  just write item->bbox = boundingbox
 364     item->bbox.x0 = (gint32)((*boundingbox)[0][0] - 1.0F);
 365     item->bbox.y0 = (gint32)((*boundingbox)[1][0] - 1.0F);
 366     item->bbox.x1 = (gint32)((*boundingbox)[0][1] + 1.0F);
 367     item->bbox.y1 = (gint32)((*boundingbox)[1][1] + 1.0F);
 368
 369     item->render_opacity = TRUE;
 370     if ( shape->_fill.paint.type() == NRArenaShape::Paint::SERVER ) {
 371         if (gc && gc->parent) {
 372             shape->fill_painter = sp_paint_server_painter_new(shape->_fill.paint.server(),
 373                                                               gc->transform, gc->parent->transform,
 374                                                               &shape->paintbox);
 375         }
 376         item->render_opacity = FALSE;
 377     }
 378     if ( shape->_stroke.paint.type() == NRArenaShape::Paint::SERVER ) {
 379         if (gc && gc->parent) {
 380             shape->stroke_painter = sp_paint_server_painter_new(shape->_stroke.paint.server(),
 381                                                                 gc->transform, gc->parent->transform,
 382                                                                 &shape->paintbox);
 383         }
 384         item->render_opacity = FALSE;
 385     }
 386     if (  (shape->_fill.paint.type() != NRArenaShape::Paint::NONE &&
 387            shape->_stroke.paint.type() != NRArenaShape::Paint::NONE)
 388           || (shape->markers)
 389         )
 390     {
 391         // don't merge item opacity with paint opacity if there is a stroke on the fill, or markers on stroke
 392         item->render_opacity = FALSE;
 393     }
 394
 395     if (beststate & NR_ARENA_ITEM_STATE_BBOX) {
 396         for (NRArenaItem *child = shape->markers; child != NULL; child = child->next) {
 397             nr_rect_l_union(&item->bbox, &item->bbox, &child->bbox);
 398         }
 399     }
 400
 401     return NR_ARENA_ITEM_STATE_ALL;
 402 }
 403
 404 int matrix_is_isometry(Geom::Matrix p) {
 405     Geom::Matrix   tp;
 406     // transposition
 407     tp[0]=p[0];
 408     tp[1]=p[2];
 409     tp[2]=p[1];
 410     tp[3]=p[3];
 411     for (int i = 4; i < 6; i++) // shut valgrind up :)
 412         tp[i] = p[i] = 0;
 413     Geom::Matrix   isom = tp*p; // A^T * A = adjunct?
 414     // Is the adjunct nearly an identity function?
 415     if (isom.isTranslation(0.01)) {
 416         // the transformation is an isometry -> no need to recompute
 417         // the uncrossed polygon
 418         if ( p.det() < 0 )
 419             return -1;
 420         else
 421             return 1;
 422     }
 423     return 0;
 424 }
 425
 426 static bool is_inner_area(NRRectL const &outer, NRRectL const &inner) {
 427     return (outer.x0 <= inner.x0 && outer.y0 <= inner.y0 && outer.x1 >= inner.x1 && outer.y1 >= inner.y1);
 428 }
 429
 430 /* returns true if the pathvector has a region that needs fill.
 431  * is for optimizing purposes, so should be fast and can falsely return true.
 432  * CANNOT falsely return false. */
 433 static bool has_inner_area(Geom::PathVector const & pv) {
 434     // return false for the cases where there is surely no region to be filled
 435     if (pv.empty())
 436         return false;
 437
 438     if ( (pv.size() == 1) && (pv.front().size() <= 1) ) {
 439         // vector has only one path with only one segment, see if that's a non-curve segment: that would mean no internal region
 440         if ( is_straight_curve(pv.front().front()) )
 441         {
 442             return false;
 443         }
 444     }
 445
 446     return true; //too costly to see if it has region to be filled, so return true.
 447 }
 448
 449 /** force_shape is used for clipping paths, when we need the shape for clipping even if it's not filled */
 450 void
 451 nr_arena_shape_update_fill(NRArenaShape *shape, NRGC *gc, NRRectL *area, bool force_shape)
 452 {
 453     if ((shape->_fill.paint.type() != NRArenaShape::Paint::NONE || force_shape) &&
 454           has_inner_area(shape->curve->get_pathvector()) ) {
 455
 456             Geom::Matrix  cached_to_new = Geom::identity();
 457             int isometry = 0;
 458             if ( shape->cached_fill ) {
 459                 if (shape->cached_fctm == gc->transform) {
 460                     isometry = 2; // identity
 461                 } else {
 462                     cached_to_new = shape->cached_fctm.inverse() * gc->transform;
 463                     isometry = matrix_is_isometry(cached_to_new);
 464                 }
 465                 if (0 != isometry && !is_inner_area(shape->cached_farea, *area))
 466                     isometry = 0;
 467             }
 468             if ( isometry == 0 ) {
 469                 if ( shape->cached_fill == NULL ) shape->cached_fill=new Shape;
 470                 shape->cached_fill->Reset();
 471
 472                 Path*  thePath=new Path;
 473                 Shape* theShape=new Shape;
 474                 {
 475                     Geom::Matrix tempMat(gc->transform);
 476                     thePath->LoadPathVector(shape->curve->get_pathvector(), tempMat, true);
 477                 }
 478
 479                 if (is_inner_area(*area, NR_ARENA_ITEM(shape)->bbox)) {
 480                     thePath->Convert(1.0);
 481                     shape->cached_fpartialy = false;
 482                 } else {
 483                     thePath->Convert(area, 1.0);
 484                     shape->cached_fpartialy = true;
 485                 }
 486
 487                 thePath->Fill(theShape, 0);
 488
 489                 if ( shape->_fill.rule == NRArenaShape::EVEN_ODD ) {
 490                     shape->cached_fill->ConvertToShape(theShape, fill_oddEven);
 491                     // alternatively, this speeds up rendering of oddeven shapes but disables AA :(
 492                     //shape->cached_fill->Copy(theShape);
 493                 } else {
 494                     shape->cached_fill->ConvertToShape(theShape, fill_nonZero);
 495                 }
 496                 shape->cached_fctm=gc->transform;
 497                 shape->cached_farea = *area;
 498                 delete theShape;
 499                 delete thePath;
 500                 if ( shape->fill_shp == NULL )
 501                     shape->fill_shp = new Shape;
 502
 503                 shape->fill_shp->Copy(shape->cached_fill);
 504
 505             } else if ( 2 == isometry ) {
 506                 if ( shape->fill_shp == NULL ) {
 507                     shape->fill_shp = new Shape;
 508                     shape->fill_shp->Copy(shape->cached_fill);
 509                 }
 510             } else {
 511
 512                 if ( shape->fill_shp == NULL )
 513                     shape->fill_shp = new Shape;
 514
 515                 shape->fill_shp->Reset(shape->cached_fill->numberOfPoints(),
 516                                        shape->cached_fill->numberOfEdges());
 517                 for (int i = 0; i < shape->cached_fill->numberOfPoints(); i++)
 518                     shape->fill_shp->AddPoint(to_2geom(shape->cached_fill->getPoint(i).x) * cached_to_new);
 519                 if ( isometry == 1 ) {
 520                     for (int i = 0; i < shape->cached_fill->numberOfEdges(); i++)
 521                         shape->fill_shp->AddEdge(shape->cached_fill->getEdge(i).st,
 522                                                  shape->cached_fill->getEdge(i).en);
 523                 } else if ( isometry == -1 ) { // need to flip poly.
 524                     for (int i = 0; i < shape->cached_fill->numberOfEdges(); i++)
 525                         shape->fill_shp->AddEdge(shape->cached_fill->getEdge(i).en,
 526                                                  shape->cached_fill->getEdge(i).st);
 527                 }
 528                 shape->fill_shp->ForceToPolygon();
 529                 shape->fill_shp->needPointsSorting();
 530                 shape->fill_shp->needEdgesSorting();
 531             }
 532             shape->delayed_shp |= shape->cached_fpartialy;
 533     }
 534 }
 535
 536 void
 537 nr_arena_shape_update_stroke(NRArenaShape *shape,NRGC* gc, NRRectL *area)
 538 {
 539     SPStyle* style = shape->style;
 540
 541     float const scale = gc->transform.descrim();
 542
 543     bool outline = (NR_ARENA_ITEM(shape)->arena->rendermode == Inkscape::RENDERMODE_OUTLINE);
 544
 545     if (outline) {
 546         // cairo does not need the livarot path for rendering
 547         return;
 548     }
 549
 550     // after switching normal stroke rendering to cairo too, optimize this: lower tolerance, disregard dashes
 551     // (since it will only be used for picking, not for rendering)
 552
 553     if (outline ||
 554         ((shape->_stroke.paint.type() != NRArenaShape::Paint::NONE) &&
 555          ( fabs(shape->_stroke.width * scale) > 0.01 ))) { // sinon c'est 0=oon veut pas de bord
 556
 557         float style_width = MAX(0.125, shape->_stroke.width * scale);
 558         float width;
 559         if (outline) {
 560             width = 0.5; // 1 pixel wide, independent of zoom
 561         } else {
 562             width = style_width;
 563         }
 564
 565         Geom::Matrix  cached_to_new = Geom::identity();
 566
 567         int isometry = 0;
 568         if ( shape->cached_stroke ) {
 569             if (shape->cached_sctm == gc->transform) {
 570                 isometry = 2; // identity
 571             } else {
 572                 cached_to_new = shape->cached_sctm.inverse() * gc->transform;
 573                 isometry = matrix_is_isometry(cached_to_new);
 574             }
 575             if (0 != isometry && !is_inner_area(shape->cached_sarea, *area))
 576                 isometry = 0;
 577             if (0 != isometry && width != shape->cached_width) {
 578                 // if this happens without setting style, we have just switched to outline or back
 579                 isometry = 0;
 580             }
 581         }
 582
 583         if ( isometry == 0 ) {
 584             if ( shape->cached_stroke == NULL ) shape->cached_stroke=new Shape;
 585             shape->cached_stroke->Reset();
 586             Path*  thePath = new Path;
 587             Shape* theShape = new Shape;
 588             {
 589                 Geom::Matrix   tempMat( gc->transform );
 590                 thePath->LoadPathVector(shape->curve->get_pathvector(), tempMat, true);
 591             }
 592
 593             // add some padding to the rendering area, so clipped path does not go into a render area
 594             NRRectL padded_area = *area;
 595             padded_area.x0 -= (NR::ICoord)width;
 596             padded_area.x1 += (NR::ICoord)width;
 597             padded_area.y0 -= (NR::ICoord)width;
 598             padded_area.y1 += (NR::ICoord)width;
 599             if ((style->stroke_dash.n_dash && !outline) || is_inner_area(padded_area, NR_ARENA_ITEM(shape)->bbox)) {
 600                 thePath->Convert((outline) ? 4.0 : 1.0);
 601                 shape->cached_spartialy = false;
 602             }
 603             else {
 604                 thePath->Convert(&padded_area, (outline) ? 4.0 : 1.0);
 605                 shape->cached_spartialy = true;
 606             }
 607
 608             if (style->stroke_dash.n_dash && !outline) {
 609                 thePath->DashPolylineFromStyle(style, scale, 1.0);
 610             }
 611
 612             ButtType butt=butt_straight;
 613             switch (shape->_stroke.cap) {
 614                 case NRArenaShape::BUTT_CAP:
 615                     butt = butt_straight;
 616                     break;
 617                 case NRArenaShape::ROUND_CAP:
 618                     butt = butt_round;
 619                     break;
 620                 case NRArenaShape::SQUARE_CAP:
 621                     butt = butt_square;
 622                     break;
 623             }
 624             JoinType join=join_straight;
 625             switch (shape->_stroke.join) {
 626                 case NRArenaShape::MITRE_JOIN:
 627                     join = join_pointy;
 628                     break;
 629                 case NRArenaShape::ROUND_JOIN:
 630                     join = join_round;
 631                     break;
 632                 case NRArenaShape::BEVEL_JOIN:
 633                     join = join_straight;
 634                     break;
 635             }
 636
 637             if (outline) {
 638                 butt = butt_straight;
 639                 join = join_straight;
 640             }
 641
 642             thePath->Stroke(theShape, false, 0.5*width, join, butt,
 643                             0.5*width*shape->_stroke.mitre_limit);
 644
 645
 646             if (outline) {
 647                 // speeds it up, but uses evenodd for the stroke shape (which does not matter for 1-pixel wide outline)
 648                 shape->cached_stroke->Copy(theShape);
 649             } else {
 650                 shape->cached_stroke->ConvertToShape(theShape, fill_nonZero);
 651             }
 652
 653             shape->cached_width = width;
 654
 655             shape->cached_sctm=gc->transform;
 656             shape->cached_sarea = *area;
 657             delete thePath;
 658             delete theShape;
 659             if ( shape->stroke_shp == NULL ) shape->stroke_shp=new Shape;
 660
 661             shape->stroke_shp->Copy(shape->cached_stroke);
 662
 663         } else if ( 2 == isometry ) {
 664             if ( shape->stroke_shp == NULL ) {
 665                 shape->stroke_shp=new Shape;
 666                 shape->stroke_shp->Copy(shape->cached_stroke);
 667             }
 668         } else {
 669             if ( shape->stroke_shp == NULL )
 670                 shape->stroke_shp=new Shape;
 671             shape->stroke_shp->Reset(shape->cached_stroke->numberOfPoints(), shape->cached_stroke->numberOfEdges());
 672             for (int i = 0; i < shape->cached_stroke->numberOfPoints(); i++)
 673                 shape->stroke_shp->AddPoint(to_2geom(shape->cached_stroke->getPoint(i).x) * cached_to_new);
 674             if ( isometry == 1 ) {
 675                 for (int i = 0; i < shape->cached_stroke->numberOfEdges(); i++)
 676                     shape->stroke_shp->AddEdge(shape->cached_stroke->getEdge(i).st,
 677                                                shape->cached_stroke->getEdge(i).en);
 678             } else if ( isometry == -1 ) {
 679                 for (int i = 0; i < shape->cached_stroke->numberOfEdges(); i++)
 680                     shape->stroke_shp->AddEdge(shape->cached_stroke->getEdge(i).en,
 681                                                shape->cached_stroke->getEdge(i).st);
 682             }
 683             shape->stroke_shp->ForceToPolygon();
 684             shape->stroke_shp->needPointsSorting();
 685             shape->stroke_shp->needEdgesSorting();
 686         }
 687         shape->delayed_shp |= shape->cached_spartialy;
 688     }
 689 }
 690
 691
 692 void
 693 nr_arena_shape_add_bboxes(NRArenaShape* shape, Geom::OptRect &bbox)
 694 {
 695     /* TODO: are these two if's mutually exclusive? ( i.e. "shape->stroke_shp <=> !shape->fill_shp" )
 696      * if so, then this can be written much more compact ! */
 697
 698     if ( shape->stroke_shp ) {
 699         Shape *larger = shape->stroke_shp;
 700         larger->CalcBBox();
 701         larger->leftX   = floor(larger->leftX);
 702         larger->rightX  = ceil(larger->rightX);
 703         larger->topY    = floor(larger->topY);
 704         larger->bottomY = ceil(larger->bottomY);
 705         Geom::Rect stroke_bbox( Geom::Interval(larger->leftX, larger->rightX),
 706                                 Geom::Interval(larger->topY,  larger->bottomY) );
 707         bbox.unionWith(stroke_bbox);
 708     }
 709
 710     if ( shape->fill_shp ) {
 711         Shape *larger = shape->fill_shp;
 712         larger->CalcBBox();
 713         larger->leftX   = floor(larger->leftX);
 714         larger->rightX  = ceil(larger->rightX);
 715         larger->topY    = floor(larger->topY);
 716         larger->bottomY = ceil(larger->bottomY);
 717         Geom::Rect fill_bbox( Geom::Interval(larger->leftX, larger->rightX),
 718                               Geom::Interval(larger->topY,  larger->bottomY) );
 719         bbox.unionWith(fill_bbox);
 720     }
 721 }
 722
 723 // cairo outline rendering:
 724 static unsigned int
 725 cairo_arena_shape_render_outline(cairo_t *ct, NRArenaItem *item, Geom::OptRect area)
 726 {
 727     NRArenaShape *shape = NR_ARENA_SHAPE(item);
 728
 729     if (!ct)
 730         return item->state;
 731
 732     guint32 rgba = NR_ARENA_ITEM(shape)->arena->outlinecolor;
 733     // FIXME: we use RGBA buffers but cairo writes BGRA (on i386), so we must cheat
 734     // by setting color channels in the "wrong" order
 735     cairo_set_source_rgba(ct, SP_RGBA32_B_F(rgba), SP_RGBA32_G_F(rgba), SP_RGBA32_R_F(rgba), SP_RGBA32_A_F(rgba));
 736
 737     cairo_set_line_width(ct, 0.5);
 738     cairo_set_tolerance(ct, 1.25); // low quality, but good enough for outline mode
 739     cairo_new_path(ct);
 740
 741     feed_pathvector_to_cairo (ct, shape->curve->get_pathvector(), shape->ctm, area, true, 0);
 742
 743     cairo_stroke(ct);
 744
 745     return item->state;
 746 }
 747
 748 // cairo stroke rendering (flat color only so far!):
 749 // works on canvas, but wrongs the colors in nonpremul buffers: icons and png export
 750 // (need to switch them to premul before this can be enabled)
 751 void
 752 cairo_arena_shape_render_stroke(NRArenaItem *item, NRRectL *area, NRPixBlock *pb)
 753 {
 754     NRArenaShape *shape = NR_ARENA_SHAPE(item);
 755     SPStyle const *style = shape->style;
 756
 757     float const scale = shape->ctm.descrim();
 758
 759     if (fabs(shape->_stroke.width * scale) < 0.01)
 760         return;
 761
 762     cairo_t *ct = nr_create_cairo_context (area, pb);
 763
 764     if (!ct)
 765         return;
 766
 767     guint32 rgba;
 768     if ( item->render_opacity ) {
 769         rgba = shape->_stroke.paint.color().toRGBA32( shape->_stroke.opacity *
 770                                                       SP_SCALE24_TO_FLOAT(style->opacity.value) );
 771     } else {
 772         rgba = shape->_stroke.paint.color().toRGBA32( shape->_stroke.opacity );
 773     }
 774
 775     // FIXME: we use RGBA buffers but cairo writes BGRA (on i386), so we must cheat
 776     // by setting color channels in the "wrong" order
 777     cairo_set_source_rgba(ct, SP_RGBA32_B_F(rgba), SP_RGBA32_G_F(rgba), SP_RGBA32_R_F(rgba), SP_RGBA32_A_F(rgba));
 778
 779     float style_width = MAX(0.125, shape->_stroke.width * scale);
 780     cairo_set_line_width(ct, style_width);
 781
 782     switch (shape->_stroke.cap) {
 783         case NRArenaShape::BUTT_CAP:
 784             cairo_set_line_cap(ct, CAIRO_LINE_CAP_BUTT);
 785             break;
 786         case NRArenaShape::ROUND_CAP:
 787             cairo_set_line_cap(ct, CAIRO_LINE_CAP_ROUND);
 788             break;
 789         case NRArenaShape::SQUARE_CAP:
 790             cairo_set_line_cap(ct, CAIRO_LINE_CAP_SQUARE);
 791             break;
 792     }
 793     switch (shape->_stroke.join) {
 794         case NRArenaShape::MITRE_JOIN:
 795             cairo_set_line_join(ct, CAIRO_LINE_JOIN_MITER);
 796             break;
 797         case NRArenaShape::ROUND_JOIN:
 798             cairo_set_line_join(ct, CAIRO_LINE_JOIN_ROUND);
 799             break;
 800         case NRArenaShape::BEVEL_JOIN:
 801             cairo_set_line_join(ct, CAIRO_LINE_JOIN_BEVEL);
 802             break;
 803     }
 804
 805     cairo_set_miter_limit (ct, style->stroke_miterlimit.value);
 806
 807     if (style->stroke_dash.n_dash) {
 808         NRVpathDash dash;
 809         dash.offset = style->stroke_dash.offset * scale;
 810         dash.n_dash = style->stroke_dash.n_dash;
 811         dash.dash = g_new(double, dash.n_dash);
 812         for (int i = 0; i < dash.n_dash; i++) {
 813             dash.dash[i] = style->stroke_dash.dash[i] * scale;
 814         }
 815         cairo_set_dash (ct, dash.dash, dash.n_dash, dash.offset);
 816         g_free(dash.dash);
 817     }
 818
 819     cairo_set_tolerance(ct, 0.1);
 820     cairo_new_path(ct);
 821
 822     feed_pathvector_to_cairo (ct, shape->curve->get_pathvector(), shape->ctm, to_2geom(area->upgrade()), true, style_width);
 823
 824     cairo_stroke(ct);
 825
 826     cairo_surface_t *cst = cairo_get_target(ct);
 827     cairo_destroy (ct);
 828     cairo_surface_finish (cst);
 829     cairo_surface_destroy (cst);
 830
 831     pb->empty = FALSE;
 832 }
 833
 834
 835 /**
 836  * Renders the item.  Markers are just composed into the parent buffer.
 837  */
 838 static unsigned int
 839 nr_arena_shape_render(cairo_t *ct, NRArenaItem *item, NRRectL *area, NRPixBlock *pb, unsigned int flags)
 840 {
 841     NRArenaShape *shape = NR_ARENA_SHAPE(item);
 842
 843     if (!shape->curve) return item->state;
 844     if (!shape->style) return item->state;
 845
 846     bool outline = (NR_ARENA_ITEM(shape)->arena->rendermode == Inkscape::RENDERMODE_OUTLINE);
 847
 848     if (outline) { // cairo outline rendering
 849
 850         pb->empty = FALSE;
 851         unsigned int ret = cairo_arena_shape_render_outline (ct, item, to_2geom((&pb->area)->upgrade()));
 852         if (ret & NR_ARENA_ITEM_STATE_INVALID) return ret;
 853
 854     } else {
 855
 856     if ( shape->delayed_shp ) {
 857         if ( nr_rect_l_test_intersect_ptr(area, &item->bbox) ) {
 858             NRGC   tempGC(NULL);
 859             tempGC.transform=shape->ctm;
 860             shape->delayed_shp = false;
 861             nr_arena_shape_update_stroke(shape,&tempGC,&pb->visible_area);
 862             nr_arena_shape_update_fill(shape,&tempGC,&pb->visible_area);
 863 /*      NRRect bbox;
 864         bbox.x0 = bbox.y0 = bbox.x1 = bbox.y1 = 0.0;
 865         nr_arena_shape_add_bboxes(shape,bbox);
 866         item->bbox.x0 = (gint32)(bbox.x0 - 1.0F);
 867         item->bbox.y0 = (gint32)(bbox.y0 - 1.0F);
 868         item->bbox.x1 = (gint32)(bbox.x1 + 1.0F);
 869         item->bbox.y1 = (gint32)(bbox.y1 + 1.0F);
 870         shape->approx_bbox=item->bbox;*/
 871         } else {
 872             return item->state;
 873         }
 874     }
 875
 876     SPStyle const *style = shape->style;
 877     if (shape->fill_shp) {
 878         NRPixBlock m;
 879         guint32 rgba;
 880
 881         nr_pixblock_setup_fast(&m, NR_PIXBLOCK_MODE_A8, area->x0, area->y0, area->x1, area->y1, TRUE);
 882
 883         // if memory allocation failed, abort render
 884         if (m.size != NR_PIXBLOCK_SIZE_TINY && m.data.px == NULL) {
 885             nr_pixblock_release (&m);
 886             return (item->state);
 887         }
 888
 889         m.visible_area = pb->visible_area;
 890         nr_pixblock_render_shape_mask_or(m,shape->fill_shp);
 891         m.empty = FALSE;
 892
 893         if (shape->_fill.paint.type() == NRArenaShape::Paint::NONE) {
 894             // do not render fill in any way
 895         } else if (shape->_fill.paint.type() == NRArenaShape::Paint::COLOR) {
 896             if ( item->render_opacity ) {
 897                 rgba = shape->_fill.paint.color().toRGBA32( shape->_fill.opacity *
 898                                                             SP_SCALE24_TO_FLOAT(style->opacity.value) );
 899             } else {
 900                 rgba = shape->_fill.paint.color().toRGBA32( shape->_fill.opacity );
 901             }
 902             nr_blit_pixblock_mask_rgba32(pb, &m, rgba);
 903             pb->empty = FALSE;
 904         } else if (shape->_fill.paint.type() == NRArenaShape::Paint::SERVER) {
 905             if (shape->fill_painter) {
 906                 nr_arena_render_paintserver_fill(pb, area, shape->fill_painter, shape->_fill.opacity, &m);
 907             }
 908         }
 909
 910         nr_pixblock_release(&m);
 911     }
 912
 913     if (shape->stroke_shp && shape->_stroke.paint.type() == NRArenaShape::Paint::COLOR) {
 914
 915         // cairo_arena_shape_render_stroke(item, area, pb);
 916
 917         guint32 rgba;
 918         NRPixBlock m;
 919
 920         nr_pixblock_setup_fast(&m, NR_PIXBLOCK_MODE_A8, area->x0, area->y0, area->x1, area->y1, TRUE);
 921
 922         // if memory allocation failed, abort render
 923         if (m.size != NR_PIXBLOCK_SIZE_TINY && m.data.px == NULL) {
 924             nr_pixblock_release (&m);
 925             return (item->state);
 926         }
 927
 928         m.visible_area = pb->visible_area;
 929         nr_pixblock_render_shape_mask_or(m, shape->stroke_shp);
 930         m.empty = FALSE;
 931
 932             if ( item->render_opacity ) {
 933                 rgba = shape->_stroke.paint.color().toRGBA32( shape->_stroke.opacity *
 934                                                               SP_SCALE24_TO_FLOAT(style->opacity.value) );
 935             } else {
 936                 rgba = shape->_stroke.paint.color().toRGBA32( shape->_stroke.opacity );
 937             }
 938             nr_blit_pixblock_mask_rgba32(pb, &m, rgba);
 939             pb->empty = FALSE;
 940
 941         nr_pixblock_release(&m);
 942
 943     } else if (shape->stroke_shp && shape->_stroke.paint.type() == NRArenaShape::Paint::SERVER) {
 944
 945         NRPixBlock m;
 946
 947         nr_pixblock_setup_fast(&m, NR_PIXBLOCK_MODE_A8, area->x0, area->y0, area->x1, area->y1, TRUE);
 948
 949         // if memory allocation failed, abort render
 950         if (m.size != NR_PIXBLOCK_SIZE_TINY && m.data.px == NULL) {
 951             nr_pixblock_release (&m);
 952             return (item->state);
 953         }
 954
 955         m.visible_area = pb->visible_area;
 956         nr_pixblock_render_shape_mask_or(m, shape->stroke_shp);
 957         m.empty = FALSE;
 958
 959         if (shape->stroke_painter) {
 960             nr_arena_render_paintserver_fill(pb, area, shape->stroke_painter, shape->_stroke.opacity, &m);
 961         }
 962
 963         nr_pixblock_release(&m);
 964     }
 965
 966     } // non-cairo non-outline branch
 967
 968     /* Render markers into parent buffer */
 969     for (NRArenaItem *child = shape->markers; child != NULL; child = child->next) {
 970         unsigned int ret = nr_arena_item_invoke_render(ct, child, area, pb, flags);
 971         if (ret & NR_ARENA_ITEM_STATE_INVALID) return ret;
 972     }
 973
 974     return item->state;
 975 }
 976
 977
 978 // cairo clipping: this basically works except for the stride-must-be-divisible-by-4 cairo bug;
 979 // reenable this when the bug is fixed and remove the rest of this function
 980 // TODO
 981 #if defined(DEADCODE) && !defined(DEADCODE)
 982 static guint
 983 cairo_arena_shape_clip(NRArenaItem *item, NRRectL *area, NRPixBlock *pb)
 984 {
 985     NRArenaShape *shape = NR_ARENA_SHAPE(item);
 986     if (!shape->curve) return item->state;
 987
 988         cairo_t *ct = nr_create_cairo_context (area, pb);
 989
 990         if (!ct)
 991             return item->state;
 992
 993         cairo_set_source_rgba(ct, 0, 0, 0, 1);
 994
 995         cairo_new_path(ct);
 996
 997         feed_pathvector_to_cairo (ct, shape->curve->get_pathvector(), shape->ctm, (area)->upgrade(), false, 0);
 998
 999         cairo_fill(ct);
1000
1001         cairo_surface_t *cst = cairo_get_target(ct);
1002         cairo_destroy (ct);
1003         cairo_surface_finish (cst);
1004         cairo_surface_destroy (cst);
1005
1006         pb->empty = FALSE;
1007
1008         return item->state;
1009 }
1010 #endif //defined(DEADCODE) && !defined(DEADCODE)
1011
1012
1013 static guint
1014 nr_arena_shape_clip(NRArenaItem *item, NRRectL *area, NRPixBlock *pb)
1015 {
1016     //return cairo_arena_shape_clip(item, area, pb);
1017
1018     NRArenaShape *shape = NR_ARENA_SHAPE(item);
1019     if (!shape->curve) return item->state;
1020
1021     if ( shape->delayed_shp || shape->fill_shp == NULL) { // we need a fill shape no matter what
1022         if ( nr_rect_l_test_intersect_ptr(area, &item->bbox) ) {
1023             NRGC   tempGC(NULL);
1024             tempGC.transform=shape->ctm;
1025             shape->delayed_shp = false;
1026             nr_arena_shape_update_fill(shape, &tempGC, &pb->visible_area, true);
1027         } else {
1028             return item->state;
1029         }
1030     }
1031
1032     if ( shape->fill_shp ) {
1033         NRPixBlock m;
1034
1035         /* fixme: We can OR in one step (Lauris) */
1036         nr_pixblock_setup_fast(&m, NR_PIXBLOCK_MODE_A8, area->x0, area->y0, area->x1, area->y1, TRUE);
1037
1038         // if memory allocation failed, abort
1039         if (m.size != NR_PIXBLOCK_SIZE_TINY && m.data.px == NULL) {
1040             nr_pixblock_release (&m);
1041             return (item->state);
1042         }
1043
1044         m.visible_area = pb->visible_area;
1045         nr_pixblock_render_shape_mask_or(m,shape->fill_shp);
1046
1047         for (int y = area->y0; y < area->y1; y++) {
1048             unsigned char *s, *d;
1049             s = NR_PIXBLOCK_PX(&m) + (y - area->y0) * m.rs;
1050             d = NR_PIXBLOCK_PX(pb) + (y - area->y0) * pb->rs;
1051             for (int x = area->x0; x < area->x1; x++) {
1052                 *d = NR_COMPOSEA_111(*s, *d);
1053                 d ++;
1054                 s ++;
1055             }
1056         }
1057         nr_pixblock_release(&m);
1058         pb->empty = FALSE;
1059     }
1060
1061     return item->state;
1062 }
1063
1064 static NRArenaItem *
1065 nr_arena_shape_pick(NRArenaItem *item, Geom::Point p, double delta, unsigned int /*sticky*/)
1066 {
1067     NRArenaShape *shape = NR_ARENA_SHAPE(item);
1068
1069     if (shape->repick_after > 0)
1070         shape->repick_after--;
1071
1072     if (shape->repick_after > 0) // we are a slow, huge path. skip this pick, returning what was returned last time
1073         return shape->last_pick;
1074
1075     if (!shape->curve) return NULL;
1076     if (!shape->style) return NULL;
1077
1078     bool outline = (NR_ARENA_ITEM(shape)->arena->rendermode == Inkscape::RENDERMODE_OUTLINE);
1079
1080     if (SP_SCALE24_TO_FLOAT(shape->style->opacity.value) == 0 && !outline)
1081         // fully transparent, no pick unless outline mode
1082         return NULL;
1083
1084     GTimeVal tstart, tfinish;
1085     g_get_current_time (&tstart);
1086
1087     double width;
1088     if (outline) {
1089         width = 0.5;
1090     } else if (shape->_stroke.paint.type() != NRArenaShape::Paint::NONE && shape->_stroke.opacity > 1e-3) {
1091         float const scale = shape->ctm.descrim();
1092         width = MAX(0.125, shape->_stroke.width * scale) / 2;
1093     } else {
1094         width = 0;
1095     }
1096
1097     double dist = NR_HUGE;
1098     int wind = 0;
1099     bool needfill = (shape->_fill.paint.type() != NRArenaShape::Paint::NONE
1100              && shape->_fill.opacity > 1e-3 && !outline);
1101
1102     if (item->arena->canvasarena) {
1103         Geom::Rect viewbox = item->arena->canvasarena->item.canvas->getViewbox();
1104         viewbox.expandBy (width);
1105         pathv_matrix_point_bbox_wind_distance(shape->curve->get_pathvector(), shape->ctm, p, NULL, needfill? &wind : NULL, &dist, 0.5, &viewbox);
1106     } else {
1107         pathv_matrix_point_bbox_wind_distance(shape->curve->get_pathvector(), shape->ctm, p, NULL, needfill? &wind : NULL, &dist, 0.5, NULL);
1108     }
1109
1110     g_get_current_time (&tfinish);
1111     glong this_pick = (tfinish.tv_sec - tstart.tv_sec) * 1000000 + (tfinish.tv_usec - tstart.tv_usec);
1112     //g_print ("pick time %lu\n", this_pick);
1113
1114     if (this_pick > 10000) { // slow picking, remember to skip several new picks
1115         shape->repick_after = this_pick / 5000;
1116     }
1117
1118     // covered by fill?
1119     if (needfill) {
1120         if (!shape->style->fill_rule.computed) {
1121             if (wind != 0) {
1122                 shape->last_pick = item;
1123                 return item;
1124             }
1125         } else {
1126             if (wind & 0x1) {
1127                 shape->last_pick = item;
1128                 return item;
1129             }
1130         }
1131     }
1132
1133     // close to the edge, as defined by strokewidth and delta?
1134     // this ignores dashing (as if the stroke is solid) and always works as if caps are round
1135     if (needfill || width > 0) { // if either fill or stroke visible,
1136         if ((dist - width) < delta) {
1137             shape->last_pick = item;
1138             return item;
1139         }
1140     }
1141
1142     // if not picked on the shape itself, try its markers
1143     for (NRArenaItem *child = shape->markers; child != NULL; child = child->next) {
1144         NRArenaItem *ret = nr_arena_item_invoke_pick(child, p, delta, 0);
1145         if (ret) {
1146             shape->last_pick = item;
1147             return item;
1148         }
1149     }
1150
1151     shape->last_pick = NULL;
1152     return NULL;
1153 }
1154
1155 /**
1156  *
1157  *  Requests a render of the shape, then if the shape is already a curve it
1158  *  unrefs the old curve; if the new curve is valid it creates a copy of the
1159  *  curve and adds it to the shape.  Finally, it requests an update of the
1160  *  arena for the shape.
1161  */
1162 void nr_arena_shape_set_path(NRArenaShape *shape, SPCurve *curve,bool justTrans)
1163 {
1164     g_return_if_fail(shape != NULL);
1165     g_return_if_fail(NR_IS_ARENA_SHAPE(shape));
1166
1167     if ( justTrans == false ) {
1168         // dirty cached versions
1169         if ( shape->cached_fill ) {
1170             delete shape->cached_fill;
1171             shape->cached_fill=NULL;
1172         }
1173         if ( shape->cached_stroke ) {
1174             delete shape->cached_stroke;
1175             shape->cached_stroke=NULL;
1176         }
1177     }
1178
1179     nr_arena_item_request_render(NR_ARENA_ITEM(shape));
1180
1181     if (shape->curve) {
1182         shape->curve->unref();
1183         shape->curve = NULL;
1184     }
1185
1186     if (curve) {
1187         shape->curve = curve;
1188         curve->ref();
1189     }
1190
1191     nr_arena_item_request_update(NR_ARENA_ITEM(shape), NR_ARENA_ITEM_STATE_ALL, FALSE);
1192 }
1193
1194 void NRArenaShape::setFill(SPPaintServer *server) {
1195     _fill.paint.set(server);
1196     _invalidateCachedFill();
1197 }
1198
1199 void NRArenaShape::setFill(SPColor const &color) {
1200     _fill.paint.set(color);
1201     _invalidateCachedFill();
1202 }
1203
1204 void NRArenaShape::setFillOpacity(double opacity) {
1205     _fill.opacity = opacity;
1206     _invalidateCachedFill();
1207 }
1208
1209 void NRArenaShape::setFillRule(NRArenaShape::FillRule rule) {
1210     _fill.rule = rule;
1211     _invalidateCachedFill();
1212 }
1213
1214 void NRArenaShape::setStroke(SPPaintServer *server) {
1215     _stroke.paint.set(server);
1216     _invalidateCachedStroke();
1217 }
1218
1219 void NRArenaShape::setStroke(SPColor const &color) {
1220     _stroke.paint.set(color);
1221     _invalidateCachedStroke();
1222 }
1223
1224 void NRArenaShape::setStrokeOpacity(double opacity) {
1225     _stroke.opacity = opacity;
1226     _invalidateCachedStroke();
1227 }
1228
1229 void NRArenaShape::setStrokeWidth(double width) {
1230     _stroke.width = width;
1231     _invalidateCachedStroke();
1232 }
1233
1234 void NRArenaShape::setMitreLimit(double limit) {
1235     _stroke.mitre_limit = limit;
1236     _invalidateCachedStroke();
1237 }
1238
1239 void NRArenaShape::setLineCap(NRArenaShape::CapType cap) {
1240     _stroke.cap = cap;
1241     _invalidateCachedStroke();
1242 }
1243
1244 void NRArenaShape::setLineJoin(NRArenaShape::JoinType join) {
1245     _stroke.join = join;
1246     _invalidateCachedStroke();
1247 }
1248
1249 /** nr_arena_shape_set_style
1250  *
1251  * Unrefs any existing style and ref's to the given one, then requests an update of the arena
1252  */
1253 void
1254 nr_arena_shape_set_style(NRArenaShape *shape, SPStyle *style)
1255 {
1256     g_return_if_fail(shape != NULL);
1257     g_return_if_fail(NR_IS_ARENA_SHAPE(shape));
1258
1259     if (style) sp_style_ref(style);
1260     if (shape->style) sp_style_unref(shape->style);
1261     shape->style = style;
1262
1263     if ( style->fill.isPaintserver() ) {
1264         shape->setFill(style->getFillPaintServer());
1265     } else if ( style->fill.isColor() ) {
1266         shape->setFill(style->fill.value.color);
1267     } else if ( style->fill.isNone() ) {
1268         shape->setFill(NULL);
1269     } else {
1270         g_assert_not_reached();
1271     }
1272     shape->setFillOpacity(SP_SCALE24_TO_FLOAT(style->fill_opacity.value));
1273     switch (style->fill_rule.computed) {
1274         case SP_WIND_RULE_EVENODD: {
1275             shape->setFillRule(NRArenaShape::EVEN_ODD);
1276             break;
1277         }
1278         case SP_WIND_RULE_NONZERO: {
1279             shape->setFillRule(NRArenaShape::NONZERO);
1280             break;
1281         }
1282         default: {
1283             g_assert_not_reached();
1284         }
1285     }
1286
1287     if ( style->stroke.isPaintserver() ) {
1288         shape->setStroke(style->getStrokePaintServer());
1289     } else if ( style->stroke.isColor() ) {
1290         shape->setStroke(style->stroke.value.color);
1291     } else if ( style->stroke.isNone() ) {
1292         shape->setStroke(NULL);
1293     } else {
1294         g_assert_not_reached();
1295     }
1296     shape->setStrokeWidth(style->stroke_width.computed);
1297     shape->setStrokeOpacity(SP_SCALE24_TO_FLOAT(style->stroke_opacity.value));
1298     switch (style->stroke_linecap.computed) {
1299         case SP_STROKE_LINECAP_ROUND: {
1300             shape->setLineCap(NRArenaShape::ROUND_CAP);
1301             break;
1302         }
1303         case SP_STROKE_LINECAP_SQUARE: {
1304             shape->setLineCap(NRArenaShape::SQUARE_CAP);
1305             break;
1306         }
1307         case SP_STROKE_LINECAP_BUTT: {
1308             shape->setLineCap(NRArenaShape::BUTT_CAP);
1309             break;
1310         }
1311         default: {
1312             g_assert_not_reached();
1313         }
1314     }
1315     switch (style->stroke_linejoin.computed) {
1316         case SP_STROKE_LINEJOIN_ROUND: {
1317             shape->setLineJoin(NRArenaShape::ROUND_JOIN);
1318             break;
1319         }
1320         case SP_STROKE_LINEJOIN_BEVEL: {
1321             shape->setLineJoin(NRArenaShape::BEVEL_JOIN);
1322             break;
1323         }
1324         case SP_STROKE_LINEJOIN_MITER: {
1325             shape->setLineJoin(NRArenaShape::MITRE_JOIN);
1326             break;
1327         }
1328         default: {
1329             g_assert_not_reached();
1330         }
1331     }
1332     shape->setMitreLimit(style->stroke_miterlimit.value);
1333
1334     //if shape has a filter
1335     if (style->filter.set && style->getFilter()) {
1336         if (!shape->filter) {
1337             int primitives = sp_filter_primitive_count(SP_FILTER(style->getFilter()));
1338             shape->filter = new Inkscape::Filters::Filter(primitives);
1339         }
1340         sp_filter_build_renderer(SP_FILTER(style->getFilter()), shape->filter);
1341     } else {
1342         //no filter set for this shape
1343         delete shape->filter;
1344         shape->filter = NULL;
1345     }
1346
1347     nr_arena_item_request_update(shape, NR_ARENA_ITEM_STATE_ALL, FALSE);
1348 }
1349
1350 void
1351 nr_arena_shape_set_paintbox(NRArenaShape *shape, NRRect const *pbox)
1352 {
1353     g_return_if_fail(shape != NULL);
1354     g_return_if_fail(NR_IS_ARENA_SHAPE(shape));
1355     g_return_if_fail(pbox != NULL);
1356
1357     if ((pbox->x0 < pbox->x1) && (pbox->y0 < pbox->y1)) {
1358         shape->paintbox = *pbox;
1359     } else {
1360         /* fixme: We kill warning, although not sure what to do here (Lauris) */
1361         shape->paintbox.x0 = shape->paintbox.y0 = 0.0F;
1362         shape->paintbox.x1 = shape->paintbox.y1 = 256.0F;
1363     }
1364
1365     nr_arena_item_request_update(shape, NR_ARENA_ITEM_STATE_ALL, FALSE);
1366 }
1367
1368 void NRArenaShape::setPaintBox(Geom::Rect const &pbox)
1369 {
1370     paintbox.x0 = pbox.min()[Geom::X];
1371     paintbox.y0 = pbox.min()[Geom::Y];
1372     paintbox.x1 = pbox.max()[Geom::X];
1373     paintbox.y1 = pbox.max()[Geom::Y];
1374
1375     nr_arena_item_request_update(this, NR_ARENA_ITEM_STATE_ALL, FALSE);
1376 }
1377
1378 static void
1379 shape_run_A8_OR(raster_info &dest,void */*data*/,int st,float vst,int en,float ven)
1380 {
1381     if ( st >= en ) return;
1382     if ( vst < 0 ) vst=0;
1383     if ( vst > 1 ) vst=1;
1384     if ( ven < 0 ) ven=0;
1385     if ( ven > 1 ) ven=1;
1386     float   sv=vst;
1387     float   dv=ven-vst;
1388     int     len=en-st;
1389     unsigned char*   d=(unsigned char*)dest.buffer;
1390     d+=(st-dest.startPix);
1391     if ( fabs(dv) < 0.001 ) {
1392         if ( vst > 0.999 ) {
1393             /* Simple copy */
1394             while (len > 0) {
1395                 d[0] = 255;
1396                 d += 1;
1397                 len -= 1;
1398             }
1399         } else {
1400             sv*=256;
1401             unsigned int c0_24=(int)sv;
1402             c0_24&=0xFF;
1403             while (len > 0) {
1404                 /* Draw */
1405                 d[0] = NR_COMPOSEA_111(c0_24,d[0]);
1406                 d += 1;
1407                 len -= 1;
1408             }
1409         }
1410     } else {
1411         if ( en <= st+1 ) {
1412             sv=0.5*(vst+ven);
1413             sv*=256;
1414             unsigned int c0_24=(int)sv;
1415             c0_24&=0xFF;
1416             /* Draw */
1417             d[0] = NR_COMPOSEA_111(c0_24,d[0]);
1418         } else {
1419             dv/=len;
1420             sv+=0.5*dv; // correction trapezoidale
1421             sv*=16777216;
1422             dv*=16777216;
1423             int c0_24 = static_cast<int>(CLAMP(sv, 0, 16777216));
1424             int s0_24 = static_cast<int>(dv);
1425             while (len > 0) {
1426                 unsigned int ca;
1427                 /* Draw */
1428                 ca = c0_24 >> 16;
1429                 if ( ca > 255 ) ca=255;
1430                 d[0] = NR_COMPOSEA_111(ca,d[0]);
1431                 d += 1;
1432                 c0_24 += s0_24;
1433                 c0_24 = CLAMP(c0_24, 0, 16777216);
1434                 len -= 1;
1435             }
1436         }
1437     }
1438 }
1439
1440 void nr_pixblock_render_shape_mask_or(NRPixBlock &m,Shape* theS)
1441 {
1442     theS->CalcBBox();
1443     float l = theS->leftX, r = theS->rightX, t = theS->topY, b = theS->bottomY;
1444     int    il,ir,it,ib;
1445     il=(int)floor(l);
1446     ir=(int)ceil(r);
1447     it=(int)floor(t);
1448     ib=(int)ceil(b);
1449
1450     if ( il >= m.area.x1 || ir <= m.area.x0 || it >= m.area.y1 || ib <= m.area.y0 ) return;
1451     if ( il < m.area.x0 ) il=m.area.x0;
1452     if ( it < m.area.y0 ) it=m.area.y0;
1453     if ( ir > m.area.x1 ) ir=m.area.x1;
1454     if ( ib > m.area.y1 ) ib=m.area.y1;
1455
1456     /* This is the FloatLigne version.  See svn (prior to Apr 2006) for versions using BitLigne or direct BitLigne. */
1457     int    curPt;
1458     float  curY;
1459     theS->BeginQuickRaster(curY, curPt);
1460
1461     FloatLigne *theI = new FloatLigne();
1462     IntLigne *theIL = new IntLigne();
1463
1464     theS->DirectQuickScan(curY, curPt, (float) it, true, 1.0);
1465
1466     char *mdata = (char*)m.data.px;
1467     if ( m.size == NR_PIXBLOCK_SIZE_TINY ) mdata=(char*)m.data.p;
1468     uint32_t *ligStart = ((uint32_t*)(mdata + ((il - m.area.x0) + m.rs * (it - m.area.y0))));
1469     for (int y = it; y < ib; y++) {
1470         theI->Reset();
1471         theS->QuickScan(curY, curPt, ((float)(y+1)), theI, 1.0);
1472         theI->Flatten();
1473         theIL->Copy(theI);
1474
1475         raster_info  dest;
1476         dest.startPix=il;
1477         dest.endPix=ir;
1478         dest.sth=il;
1479         dest.stv=y;
1480         dest.buffer=ligStart;
1481         theIL->Raster(dest, NULL, shape_run_A8_OR);
1482         ligStart=((uint32_t*)(((char*)ligStart)+m.rs));
1483     }
1484     theS->EndQuickRaster();
1485     delete theI;
1486     delete theIL;
1487 }
1488
1489
1490 /*
1491   Local Variables:
1492   mode:c++
1493   c-file-style:"stroustrup"
1494   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1495   indent-tabs-mode:nil
1496   fill-column:99
1497   End:
1498 */
1499 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :