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;
}
