inline void LinearGradient::fill_params(Params ¶ms)const { params.p1=param_p1.get(Point()); params.p2=param_p2.get(Point()); params.loop=param_loop.get(bool()); params.zigzag=param_zigzag.get(bool()); params.gradient.set(param_gradient.get(Gradient()), params.loop, params.zigzag); params.calc_diff(); }
bool LinearGradient::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const { Params params; fill_params(params); if (!renddesc.get_transformation_matrix().is_identity()) { Point origin = params.p1; Point axis_x = params.p2 - origin; Point axis_y = axis_x.perp(); origin = renddesc.get_transformation_matrix().get_transformed(origin); axis_x = renddesc.get_transformation_matrix().get_transformed(axis_x, false); axis_y = renddesc.get_transformation_matrix().get_transformed(axis_y, false); Point valid_axis_x = -axis_y.perp(); Real mag_squared = valid_axis_x.mag_squared(); if (mag_squared > 0.0) valid_axis_x *= (valid_axis_x * axis_x)/mag_squared; else valid_axis_x = axis_x; params.p1 = origin; params.p2 = origin + valid_axis_x; params.calc_diff(); } SuperCallback supercb(cb,0,9500,10000); if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT) { surface->set_wh(renddesc.get_w(),renddesc.get_h()); } else { if(!context.accelerated_render(surface,quality,renddesc,&supercb)) return false; if(get_amount()==0) return true; } int x,y; Surface::pen pen(surface->begin()); const Real pw(renddesc.get_pw()),ph(renddesc.get_ph()); Point pos; Point tl(renddesc.get_tl()); const int w(surface->get_w()); const int h(surface->get_h()); synfig::Real supersample = calc_supersample(params, pw, ph); if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT) { for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph) for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw) pen.put_value(color_func(params,pos,supersample)); } else { for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph) for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw) pen.put_value(Color::blend(color_func(params,pos,supersample),pen.get_value(),get_amount(),get_blend_method())); } // Mark our progress as finished if(cb && !cb->amount_complete(10000,10000)) return false; return true; }