--- /dev/null
+/* === S Y N F I G ========================================================= */
+/*! \file plant.cpp
+** \brief Implementation of the "Plant" layer
+**
+** $Id$
+**
+** \legal
+** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+** Copyright (c) 2007, 2008 Chris Moore
+**
+** This package is free software; you can redistribute it and/or
+** modify it under the terms of the GNU General Public License as
+** published by the Free Software Foundation; either version 2 of
+** the License, or (at your option) any later version.
+**
+** This package is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+** General Public License for more details.
+** \endlegal
+*/
+/* ========================================================================= */
+
+/* === H E A D E R S ======================================================= */
+
+#ifdef USING_PCH
+# include "pch.h"
+#else
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <synfig/angle.h>
+#include "plant.h"
+#include <synfig/string.h>
+#include <synfig/time.h>
+#include <synfig/context.h>
+#include <synfig/paramdesc.h>
+#include <synfig/renddesc.h>
+#include <synfig/surface.h>
+#include <synfig/value.h>
+#include <synfig/valuenode.h>
+
+#include <ETL/calculus>
+#include <ETL/bezier>
+#include <ETL/hermite>
+#include <vector>
+
+#include <synfig/valuenode_bline.h>
+
+#endif
+
+using namespace etl;
+
+/* === M A C R O S ========================================================= */
+
+#define SAMPLES 300
+#define ROUND_END_FACTOR (4)
+#define CUSP_THRESHOLD (0.15)
+#define NO_LOOP_COOKIE synfig::Vector(84951305,7836658)
+#define EPSILON (0.000000001)
+#define CUSP_TANGENT_ADJUST (0.025)
+
+/* === G L O B A L S ======================================================= */
+
+SYNFIG_LAYER_INIT(Plant);
+SYNFIG_LAYER_SET_NAME(Plant,"plant");
+SYNFIG_LAYER_SET_LOCAL_NAME(Plant,N_("Plant"));
+SYNFIG_LAYER_SET_CATEGORY(Plant,N_("Other"));
+SYNFIG_LAYER_SET_VERSION(Plant,"0.2");
+SYNFIG_LAYER_SET_CVS_ID(Plant,"$Id$");
+
+/* === P R O C E D U R E S ================================================= */
+
+/* === M E T H O D S ======================================================= */
+
+
+Plant::Plant():
+ origin(0,0),
+ split_angle(Angle::deg(10)),
+ gravity(0,-0.1),
+ velocity(0.3),
+ perp_velocity(0.0),
+ step(0.01),
+ sprouts(10),
+ version(version__),
+ use_width(true)
+{
+ bounding_rect=Rect::zero();
+ random_factor=0.2;
+ random.set_seed(time(NULL));
+
+ bline.push_back(BLinePoint());
+ bline.push_back(BLinePoint());
+ bline.push_back(BLinePoint());
+ bline[0].set_vertex(Point(0,1));
+ bline[1].set_vertex(Point(0,-1));
+ bline[2].set_vertex(Point(1,0));
+ bline[0].set_tangent(bline[1].get_vertex()-bline[2].get_vertex()*0.5f);
+ bline[1].set_tangent(bline[2].get_vertex()-bline[0].get_vertex()*0.5f);
+ bline[2].set_tangent(bline[0].get_vertex()-bline[1].get_vertex()*0.5f);
+ bline[0].set_width(1.0f);
+ bline[1].set_width(1.0f);
+ bline[2].set_width(1.0f);
+ bline_loop=true;
+ mass=(0.5);
+ splits=5;
+ drag=0.1;
+ size=0.015;
+ needs_sync_=true;
+ sync();
+ size_as_alpha=false;
+ reverse=true;
+}
+
+void
+Plant::branch(int n,int depth,float t, float stunt_growth, synfig::Point position,synfig::Vector vel)const
+{
+ float next_split((1.0-t)/(splits-depth)+t/*+random_factor*random(40+depth,t*splits,0,0)/splits*/);
+ for(;t<next_split;t+=step)
+ {
+ vel[0]+=gravity[0]*step;
+ vel[1]+=gravity[1]*step;
+ vel*=(1.0-(drag)*step);
+ position[0]+=vel[0]*step;
+ position[1]+=vel[1]*step;
+
+ particle_list.push_back(Particle(position, gradient(t)));
+ if (particle_list.size() % 1000000 == 0)
+ synfig::info("constructed %d million particles...", particle_list.size()/1000000);
+
+ bounding_rect.expand(position);
+ }
+
+ if(t>=1.0-stunt_growth)return;
+
+ synfig::Real sin_v=synfig::Angle::cos(split_angle).get();
+ synfig::Real cos_v=synfig::Angle::sin(split_angle).get();
+
+ synfig::Vector velocity1(vel[0]*sin_v - vel[1]*cos_v + random_factor*random(Random::SMOOTH_COSINE, 30+n+depth, t*splits, 0.0f, 0.0f),
+ vel[0]*cos_v + vel[1]*sin_v + random_factor*random(Random::SMOOTH_COSINE, 32+n+depth, t*splits, 0.0f, 0.0f));
+ synfig::Vector velocity2(vel[0]*sin_v + vel[1]*cos_v + random_factor*random(Random::SMOOTH_COSINE, 31+n+depth, t*splits, 0.0f, 0.0f),
+ -vel[0]*cos_v + vel[1]*sin_v + random_factor*random(Random::SMOOTH_COSINE, 33+n+depth, t*splits, 0.0f, 0.0f));
+
+ Plant::branch(n,depth+1,t,stunt_growth,position,velocity1);
+ Plant::branch(n,depth+1,t,stunt_growth,position,velocity2);
+}
+
+void
+Plant::calc_bounding_rect()const
+{
+ std::vector<synfig::BLinePoint>::const_iterator iter,next;
+
+ bounding_rect=Rect::zero();
+
+ // Bline must have at least 2 points in it
+ if(bline.size()<2)
+ return;
+
+ next=bline.begin();
+
+ if(bline_loop)
+ iter=--bline.end();
+ else
+ iter=next++;
+
+ for(;next!=bline.end();iter=next++)
+ {
+ bounding_rect.expand(iter->get_vertex());
+ bounding_rect.expand(next->get_vertex());
+ bounding_rect.expand(iter->get_vertex()+iter->get_tangent2()*0.3333333333333);
+ bounding_rect.expand(next->get_vertex()-next->get_tangent1()*0.3333333333333);
+ bounding_rect.expand(next->get_vertex()+next->get_tangent2()*velocity);
+ }
+ bounding_rect.expand_x(gravity[0]);
+ bounding_rect.expand_y(gravity[1]);
+ bounding_rect.expand_x(size);
+ bounding_rect.expand_y(size);
+}
+
+void
+Plant::sync()const
+{
+ Mutex::Lock lock(mutex);
+ if (!needs_sync_) return;
+ time_t start_time; time(&start_time);
+ particle_list.clear();
+
+ bounding_rect=Rect::zero();
+
+ // Bline must have at least 2 points in it
+ if(bline.size()<2)
+ {
+ needs_sync_=false;
+ return;
+ }
+
+ std::vector<synfig::BLinePoint>::const_iterator iter,next;
+
+ etl::hermite<Vector> curve;
+
+ Real step(abs(this->step));
+
+ int seg(0);
+
+ next=bline.begin();
+
+ if(bline_loop) iter=--bline.end(); // iter is the last bline in the list; next is the first bline in the list
+ else iter=next++; // iter is the first bline in the list; next is the second bline in the list
+
+ // loop through the bline; seg counts the blines as we do so; stop before iter is the last bline in the list
+ for(;next!=bline.end();iter=next++,seg++)
+ {
+ float iterw=iter->get_width(); // the width value of the iter vertex
+ float nextw=next->get_width(); // the width value of the next vertex
+ float width; // the width at an intermediate position
+ curve.p1()=iter->get_vertex();
+ curve.t1()=iter->get_tangent2();
+ curve.p2()=next->get_vertex();
+ curve.t2()=next->get_tangent1();
+ curve.sync();
+ etl::derivative<etl::hermite<Vector> > deriv(curve);
+
+ Real f;
+
+ int i=0, branch_count = 0, steps = round_to_int(1.0/step);
+ if (steps < 1) steps = 1;
+ for(f=0.0;f<1.0;f+=step,i++)
+ {
+ Point point(curve(f));
+
+ particle_list.push_back(Particle(point, gradient(0)));
+ if (particle_list.size() % 1000000 == 0)
+ synfig::info("constructed %d million particles...", particle_list.size()/1000000);
+
+ bounding_rect.expand(point);
+
+ Real stunt_growth(random_factor * (random(Random::SMOOTH_COSINE,i,f+seg,0.0f,0.0f)/2.0+0.5));
+ stunt_growth*=stunt_growth;
+
+ if((((i+1)*sprouts + steps/2) / steps) > branch_count) {
+ Vector branch_velocity(deriv(f).norm()*velocity + deriv(f).perp().norm()*perp_velocity);
+
+ if (isnan(branch_velocity[0]) || isnan(branch_velocity[1]))
+ continue;
+
+ branch_velocity[0] += random_factor * random(Random::SMOOTH_COSINE, 1, f*splits, 0.0f, 0.0f);
+ branch_velocity[1] += random_factor * random(Random::SMOOTH_COSINE, 2, f*splits, 0.0f, 0.0f);
+
+ if (use_width)
+ {
+ width = iterw+(nextw-iterw)*f; // calculate the width based on the current position
+
+ branch_velocity[0] *= width; // scale the velocity accordingly to the current width
+ branch_velocity[1] *= width;
+ }
+
+ branch_count++;
+ branch(i, 0, 0, // time
+ stunt_growth, // stunt growth
+ point, branch_velocity);
+ }
+ }
+ }
+
+ time_t end_time; time(&end_time);
+ if (end_time-start_time > 4)
+ synfig::info("Plant::sync() constructed %d particles in %d seconds\n",
+ particle_list.size(), int(end_time-start_time));
+ needs_sync_=false;
+}
+
+bool
+Plant::set_param(const String & param, const ValueBase &value)
+{
+ if(param=="bline" && value.get_type()==ValueBase::TYPE_LIST)
+ {
+ bline=value;
+ bline_loop=value.get_loop();
+ needs_sync_=true;
+
+ return true;
+ }
+ if(param=="seed" && value.same_type_as(int()))
+ {
+ random.set_seed(value.get(int()));
+ needs_sync_=true;
+ return true;
+ }
+ IMPORT(origin);
+ IMPORT_PLUS(split_angle,needs_sync_=true);
+ IMPORT_PLUS(gravity,needs_sync_=true);
+ IMPORT_PLUS(gradient,needs_sync_=true);
+ IMPORT_PLUS(velocity,needs_sync_=true);
+ IMPORT_PLUS(perp_velocity,needs_sync_=true);
+ IMPORT_PLUS(step,{
+ needs_sync_ = true;
+ if (step <= 0)
+ step=0.01; // user is probably clueless - give a good default
+ else if (step < 0.00001)
+ step=0.00001; // 100K should be enough for anyone
+ else if (step > 1)
+ step=1;
+ });
+ IMPORT_PLUS(splits,{
+ needs_sync_=true;
+ if (splits < 1)
+ splits = 1;
+ });
+ IMPORT_PLUS(sprouts,needs_sync_=true);
+ IMPORT_PLUS(random_factor,needs_sync_=true);
+ IMPORT_PLUS(drag,needs_sync_=true);
+ IMPORT(size);
+ IMPORT(size_as_alpha);
+ IMPORT(reverse);
+ IMPORT(use_width);
+
+ IMPORT_AS(origin,"offset");
+
+ return Layer_Composite::set_param(param,value);
+}
+/*
+void
+Plant::set_time(Context context, Time time)const
+{
+ if(needs_sync==true)
+ {
+ sync();
+ needs_sync_=false;
+ }
+ //const_cast<Plant*>(this)->sync();
+ context.set_time(time);
+}
+
+void
+Plant::set_time(Context context, Time time, Vector pos)const
+{
+ if(needs_sync==true)
+ {
+ sync();
+ needs_sync_=false;
+ }
+ //const_cast<Plant*>(this)->sync();
+ context.set_time(time,pos);
+}
+*/
+ValueBase
+Plant::get_param(const String& param)const
+{
+ if(param=="seed")
+ return random.get_seed();
+ EXPORT(bline);
+ EXPORT(origin);
+ EXPORT(split_angle);
+ EXPORT(gravity);
+ EXPORT(velocity);
+ EXPORT(perp_velocity);
+ EXPORT(step);
+ EXPORT(gradient);
+ EXPORT(splits);
+ EXPORT(sprouts);
+ EXPORT(random_factor);
+ EXPORT(drag);
+ EXPORT(size);
+ EXPORT(size_as_alpha);
+ EXPORT(reverse);
+ EXPORT(use_width);
+
+ EXPORT_NAME();
+
+ if(param=="Version" || param=="version" || param=="version__")
+ return version;
+
+ return Layer_Composite::get_param(param);
+}
+
+Layer::Vocab
+Plant::get_param_vocab()const
+{
+ Layer::Vocab ret(Layer_Composite::get_param_vocab());
+
+ ret.push_back(ParamDesc("bline")
+ .set_local_name(_("Vertices"))
+ .set_description(_("A list of BLine Points"))
+ .set_origin("origin")
+ .set_hint("width")
+ );
+
+ ret.push_back(ParamDesc("origin")
+ .set_local_name(_("Origin"))
+ );
+
+ ret.push_back(ParamDesc("gradient")
+ .set_local_name(_("Gradient"))
+ .set_description(_("Gradient to be used for coloring the plant"))
+ );
+
+ ret.push_back(ParamDesc("split_angle")
+ .set_local_name(_("Split Angle"))
+ .set_description(_("Angle by which each split deviates from its parent"))
+ );
+
+ ret.push_back(ParamDesc("gravity")
+ .set_local_name(_("Gravity"))
+ .set_description(_("Direction in which the shoots tend to face"))
+ .set_is_distance()
+ );
+
+ ret.push_back(ParamDesc("velocity")
+ .set_local_name(_("Tangential Velocity"))
+ .set_description(_("Amount to which shoots tend to grow along the tangent to the BLine"))
+ );
+
+ ret.push_back(ParamDesc("perp_velocity")
+ .set_local_name(_("Perpendicular Velocity"))
+ .set_description(_("Amount to which shoots tend to grow perpendicular to the tangent to the BLine"))
+ );
+
+ ret.push_back(ParamDesc("size")
+ .set_local_name(_("Stem Size"))
+ .set_description(_("Size of the stem"))
+ .set_is_distance()
+ );
+
+ ret.push_back(ParamDesc("size_as_alpha")
+ .set_local_name(_("Size As Alpha"))
+ .set_description(_("If enabled, the alpha channel from the gradient is multiplied by the stem size, and an alpha of 1.0 is used when rendering"))
+ );
+
+ ret.push_back(ParamDesc("reverse")
+ .set_local_name(_("Reverse"))
+ .set_description(_("If enabled, render the plant in the opposite direction"))
+ );
+
+ ret.push_back(ParamDesc("step")
+ .set_local_name(_("Step"))
+ .set_description(_("Measure of the distance between points when rendering"))
+ );
+
+ ret.push_back(ParamDesc("seed")
+ .set_local_name(_("Seed"))
+ .set_description(_("Used to seed the pseudo-random number generator"))
+ );
+
+ ret.push_back(ParamDesc("splits")
+ .set_local_name(_("Splits"))
+ .set_description(_("Maximum number of times that each sprout can sprout recursively"))
+ );
+
+ ret.push_back(ParamDesc("sprouts")
+ .set_local_name(_("Sprouts"))
+ .set_description(_("Number of places that growth occurs on each bline section"))
+ );
+
+ ret.push_back(ParamDesc("random_factor")
+ .set_local_name(_("Random Factor"))
+ .set_description(_("Used to scale down all random effects. Set to zero to disable randomness"))
+ );
+
+ ret.push_back(ParamDesc("drag")
+ .set_local_name(_("Drag"))
+ .set_description(_("Drag slows the growth"))
+ );
+
+ ret.push_back(ParamDesc("use_width")
+ .set_local_name(_("Use Width"))
+ .set_description(_("Scale the velocity by the bline's width"))
+ );
+
+ return ret;
+}
+
+bool
+Plant::set_version(const String &ver)
+{
+ version = ver;
+
+ if (version == "0.1")
+ use_width = false;
+
+ return true;
+}
+
+bool
+Plant::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
+{
+ bool ret(context.accelerated_render(surface,quality,renddesc,cb));
+ if(is_disabled() || !ret)
+ return ret;
+
+ Surface dest_surface;
+ dest_surface.set_wh(surface->get_w(),surface->get_h());
+ dest_surface.clear();
+
+ const Point tl(renddesc.get_tl()-origin);
+ const Point br(renddesc.get_br()-origin);
+
+ const int w(renddesc.get_w());
+ const int h(renddesc.get_h());
+
+ const int surface_width(surface->get_w());
+ const int surface_height(surface->get_h());
+
+ // Width and Height of a pixel
+ const Real pw = (br[0] - tl[0]) / w;
+ const Real ph = (br[1] - tl[1]) / h;
+
+ if (isinf(pw) || isinf(ph))
+ return true;
+
+ if(needs_sync_==true)
+ sync();
+
+ if (particle_list.begin() != particle_list.end())
+ {
+ std::vector<Particle>::iterator iter;
+ Particle *particle;
+
+ float radius(size*sqrt(1.0f/(abs(pw)*abs(ph))));
+
+ int x1,y1,x2,y2;
+
+ if (reverse) iter = particle_list.end();
+ else iter = particle_list.begin();
+
+ while (true)
+ {
+ if (reverse) particle = &(*(iter-1));
+ else particle = &(*iter);
+
+ float scaled_radius(radius);
+ Color color(particle->color);
+ if(size_as_alpha)
+ {
+ scaled_radius*=color.get_a();
+ color.set_a(1);
+ }
+
+ // previously, radius was multiplied by sqrt(step)*12 only if
+ // the radius came out at less than 1 (pixel):
+ // if (radius<=1.0f) radius*=sqrt(step)*12.0f;
+ // seems a little arbitrary - does it help?
+
+ // calculate the box that this particle will be drawn as
+ float x1f=(particle->point[0]-tl[0])/pw-(scaled_radius*0.5);
+ float x2f=(particle->point[0]-tl[0])/pw+(scaled_radius*0.5);
+ float y1f=(particle->point[1]-tl[1])/ph-(scaled_radius*0.5);
+ float y2f=(particle->point[1]-tl[1])/ph+(scaled_radius*0.5);
+ x1=ceil_to_int(x1f);
+ x2=ceil_to_int(x2f)-1;
+ y1=ceil_to_int(y1f);
+ y2=ceil_to_int(y2f)-1;
+
+ // if the box isn't entirely off the canvas, draw it
+ if(x1<=surface_width && y1<=surface_height && x2>=0 && y2>=0)
+ {
+ float x1e=x1-x1f, x2e=x2f-x2, y1e=y1-y1f, y2e=y2f-y2;
+ // printf("x1e %.4f x2e %.4f y1e %.4f y2e %.4f\n", x1e, x2e, y1e, y2e);
+
+ // adjust the box so it's entirely on the canvas
+ if(x1<=0) { x1=0; x1e=0; }
+ if(y1<=0) { y1=0; y1e=0; }
+ if(x2>=surface_width) { x2=surface_width; x2e=0; }
+ if(y2>=surface_height) { y2=surface_height; y2e=0; }
+
+ int w(x2-x1), h(y2-y1);
+
+ Surface::alpha_pen surface_pen(dest_surface.get_pen(x1,y1),1.0f);
+ if(w>0 && h>0)
+ dest_surface.fill(color,surface_pen,w,h);
+
+ /* the rectangle doesn't cross any vertical pixel boundaries so we don't
+ * need to draw any top or bottom edges
+ */
+ if(x2<x1)
+ {
+ // case 1 - a single pixel
+ if(y2<y1)
+ {
+ surface_pen.move_to(x2,y2);
+ surface_pen.set_alpha((x2f-x1f)*(y2f-y1f));
+ surface_pen.put_value(color);
+ }
+ // case 2 - a single vertical column of pixels
+ else
+ {
+ surface_pen.move_to(x2,y1-1);
+ if (y1e!=0) // maybe draw top pixel
+ {
+ surface_pen.set_alpha(y1e*(x2f-x1f));
+ surface_pen.put_value(color);
+ }
+ surface_pen.inc_y();
+ surface_pen.set_alpha(x2f-x1f);
+ for(int i=y1; i<y2; i++) // maybe draw pixels between
+ {
+ surface_pen.put_value(color);
+ surface_pen.inc_y();
+ }
+ if (y2e!=0) // maybe draw bottom pixel
+ {
+ surface_pen.set_alpha(y2e*(x2f-x1f));
+ surface_pen.put_value(color);
+ }
+ }
+ }
+ else
+ {
+ // case 3 - a single horizontal row of pixels
+ if(y2<y1)
+ {
+ surface_pen.move_to(x1-1,y2);
+ if (x1e!=0) // maybe draw left pixel
+ {
+ surface_pen.set_alpha(x1e*(y2f-y1f));
+ surface_pen.put_value(color);
+ }
+ surface_pen.inc_x();
+ surface_pen.set_alpha(y2f-y1f);
+ for(int i=x1; i<x2; i++) // maybe draw pixels between
+ {
+ surface_pen.put_value(color);
+ surface_pen.inc_x();
+ }
+ if (x2e!=0) // maybe draw right pixel
+ {
+ surface_pen.set_alpha(x2e*(y2f-y1f));
+ surface_pen.put_value(color);
+ }
+ }
+ // case 4 - a proper block of pixels
+ else
+ {
+ if (x1e!=0) // maybe draw left edge
+ {
+ surface_pen.move_to(x1-1,y1-1);
+ if (y1e!=0) // maybe draw top left pixel
+ {
+ surface_pen.set_alpha(x1e*y1e);
+ surface_pen.put_value(color);
+ }
+ surface_pen.inc_y();
+ surface_pen.set_alpha(x1e);
+ for(int i=y1; i<y2; i++) // maybe draw pixels along the left edge
+ {
+ surface_pen.put_value(color);
+ surface_pen.inc_y();
+ }
+ if (y2e!=0) // maybe draw bottom left pixel
+ {
+ surface_pen.set_alpha(x1e*y2e);
+ surface_pen.put_value(color);
+ }
+ surface_pen.inc_x();
+ }
+ else
+ surface_pen.move_to(x1,y2);
+
+ if (y2e!=0) // maybe draw bottom edge
+ {
+ surface_pen.set_alpha(y2e);
+ for(int i=x1; i<x2; i++) // maybe draw pixels along the bottom edge
+ {
+ surface_pen.put_value(color);
+ surface_pen.inc_x();
+ }
+ if (x2e!=0) // maybe draw bottom right pixel
+ {
+ surface_pen.set_alpha(x2e*y2e);
+ surface_pen.put_value(color);
+ }
+ surface_pen.dec_y();
+ }
+ else
+ surface_pen.move_to(x2,y2-1);
+
+ if (x2e!=0) // maybe draw right edge
+ {
+ surface_pen.set_alpha(x2e);
+ for(int i=y1; i<y2; i++) // maybe draw pixels along the right edge
+ {
+ surface_pen.put_value(color);
+ surface_pen.dec_y();
+ }
+ if (y1e!=0) // maybe draw top right pixel
+ {
+ surface_pen.set_alpha(x2e*y1e);
+ surface_pen.put_value(color);
+ }
+ surface_pen.dec_x();
+ }
+ else
+ surface_pen.move_to(x2-1,y1-1);
+
+ if (y1e!=0) // maybe draw top edge
+ {
+ surface_pen.set_alpha(y1e);
+ for(int i=x1; i<x2; i++) // maybe draw pixels along the top edge
+ {
+ surface_pen.put_value(color);
+ surface_pen.dec_x();
+ }
+ }
+ }
+ }
+ }
+
+ if (reverse)
+ {
+ if (--iter == particle_list.begin())
+ break;
+ }
+ else
+ {
+ if (++iter == particle_list.end())
+ break;
+ }
+ }
+ }
+
+ Surface::alpha_pen pen(surface->get_pen(0,0),get_amount(),get_blend_method());
+ dest_surface.blit_to(pen);
+
+ return true;
+}
+
+Rect
+Plant::get_bounding_rect(Context context)const
+{
+ if(needs_sync_==true)
+ sync();
+
+ if(is_disabled())
+ return Rect::zero();
+
+ if(Color::is_onto(get_blend_method()))
+ return context.get_full_bounding_rect() & bounding_rect;
+
+ //if(get_blend_method()==Color::BLEND_BEHIND)
+ // return context.get_full_bounding_rect() | bounding_rect;
+ return bounding_rect;
+}