/* === S Y N F I G ========================================================= */
/*! \file circle.cpp
-** \brief Template Header
+** \brief Implementation of the "Circle" layer
**
-** $Id: circle.cpp,v 1.2 2005/01/24 03:08:17 darco Exp $
+** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+** Copyright (c) 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
SYNFIG_LAYER_INIT(Circle);
SYNFIG_LAYER_SET_NAME(Circle,"circle");
-SYNFIG_LAYER_SET_LOCAL_NAME(Circle,_("Circle"));
-SYNFIG_LAYER_SET_CATEGORY(Circle,_("Geometry"));
+SYNFIG_LAYER_SET_LOCAL_NAME(Circle,N_("Circle"));
+SYNFIG_LAYER_SET_CATEGORY(Circle,N_("Geometry"));
SYNFIG_LAYER_SET_VERSION(Circle,"0.1");
-SYNFIG_LAYER_SET_CVS_ID(Circle,"$Id: circle.cpp,v 1.2 2005/01/24 03:08:17 darco Exp $");
+SYNFIG_LAYER_SET_CVS_ID(Circle,"$Id$");
/* -- F U N C T I O N S ----------------------------------------------------- */
{
constructcache();
}
-
+
bool
Circle::ImportParameters(const String ¶m, const ValueBase &value)
{
- IMPORT(color);
+ IMPORT_PLUS(color, { if (color.get_a() == 0) { if (converted_blend_) {
+ set_blend_method(Color::BLEND_ALPHA_OVER);
+ color.set_a(1); } else transparent_color_ = true; } });
IMPORT(radius);
IMPORT(feather);
IMPORT(invert);
IMPORT(pos);
IMPORT(falloff);
-
+
return Layer_Composite::set_param(param,value);
}
constructcache();
return true;
}
-
+
return false;
}
EXPORT_NAME();
EXPORT_VERSION();
-
+
return Layer_Composite::get_param(param);
}
Circle::get_param_vocab()const
{
Layer::Vocab ret(Layer_Composite::get_param_vocab());
-
+
ret.push_back(ParamDesc("color")
.set_local_name(_("Color"))
);
);
ret.push_back(ParamDesc("pos")
.set_local_name(_("Center"))
- );
+ );
ret.push_back(ParamDesc("invert")
.set_local_name(_("Invert"))
.set_description(_("Invert the circle"))
.add_enum_value(FALLOFF_SIGMOND,"sigmond",_("Sigmond"))
.add_enum_value(FALLOFF_COSINE,"cosine",_("Cosine"))
);
-
+
return ret;
}
if(get_amount()==0)
return context.hit_check(point);
-
+
bool in_circle(temp.mag_squared() <= radius*radius);
if(invert)
if(get_amount()-(feather/radius)<=0.0)
in_circle=false;
}
-
+
if(in_circle)
{
synfig::Layer::Handle tmp;
return context.hit_check(point);
}
-//falloff functions
+//falloff functions
Real Circle::SqdFalloff(const Circle::CircleDataCache &c, const Real &mag_sqd)
{
//squared proportional falloff
return 1.0 - (c.outer_radius_sqd - mag_sqd) / c.diff_sqd;
}
-
+
Real Circle::SqrtFalloff(const Circle::CircleDataCache &c, const Real &mag_sqd)
{
//linear distance falloff
ret = 1.0 - sqrt(ret);
return ret;
}
-
+
Real Circle::LinearFalloff(const Circle::CircleDataCache &c, const Real &mag_sqd)
{
//linear distance falloff
return 1.0 - ( c.outer_radius - sqrt(mag_sqd) ) / c.double_feather;
//linear distance falloff
}
-
+
Real Circle::SigmondFalloff(const Circle::CircleDataCache &c, const Real &mag_sqd)
{
//linear distance falloff
cache.inner_radius = radius - feather;
if(cache.inner_radius < 0)
cache.inner_radius = 0;
-
+
cache.outer_radius = radius + feather;
-
+
cache.inner_radius_sqd = cache.inner_radius > 0 ? (radius-feather)*(radius-feather) : 0;
cache.outer_radius_sqd = (radius+feather)*(radius+feather);
-
+
cache.diff_sqd = feather*feather*4.0;
cache.double_feather = feather*2.0;
-
+
falloff_func = GetFalloffFunc();
}
Circle::FALLOFF_FUNC *Circle::GetFalloffFunc()const
{
switch(falloff)
- {
+ {
case FALLOFF_SQUARED: return invert?InvSqdFalloff:SqdFalloff;
-
+
case FALLOFF_SQRT: return invert?InvSqrtFalloff:SqrtFalloff;
-
+
case FALLOFF_INTERPOLATION_LINEAR: return invert?InvLinearFalloff:LinearFalloff;
-
+
case FALLOFF_SIGMOND: return invert?InvSigmondFalloff:SigmondFalloff;
case FALLOFF_COSINE:
if(radius==0 || is_disabled())
return context.get_color(point);
-
+
Point temp=pos-point;
-
+
/*const Real inner_radius = radius-feather;
const Real outer_radius = radius+feather;
-
+
const Real inner_radius_sqd = inner_radius > 0 ? (radius-feather)*(radius-feather) : 0;
const Real outer_radius_sqd = (radius+feather)*(radius+feather);
-
+
const Real diff_radii_sqd = outer_radius_sqd - inner_radius_sqd;
const Real double_feather = feather*2.0;*/
-
+
/*const Real &inner_radius = cache.inner_radius;
const Real &outer_radius = cache.outer_radius;*/
-
+
const Real &inner_radius_sqd = cache.inner_radius_sqd;
const Real &outer_radius_sqd = cache.outer_radius_sqd;
-
+
/*const Real &diff_radii_sqd = cache.diff_radii_sqd;
const Real &double_feather = cache.double_feather;*/
-
+
const Vector::value_type mag_squared = temp.mag_squared();
-
+
//Outside the circle, with feathering enabled
if( mag_squared > outer_radius_sqd )
{
// inverted -> outside == colored in
if(invert)
- {
+ {
if(get_amount() == 1 && get_blend_method() == Color::BLEND_STRAIGHT)
return color;
else
else
return context.get_color(point);
}
-
+
//inside the circle's solid area (with feathering)
else if(mag_squared <= inner_radius_sqd)
{
else
return context.get_color(point);
}
-
+
//If we get here, the pixel is within the feathering area, and is thus subject to falloff
else
{
Color::value_type alpha;
-
+
/*switch(falloff)
{
-
+
case FALLOFF_SQUARED:
//squared proportional falloff
alpha = (outer_radius_sqd - mag_squared) / diff_radii_sqd;
break;
-
+
case FALLOFF_SQRT:
//linear distance falloff
alpha = ( outer_radius - sqrt(mag_squared) ) / double_feather;
//then take the square root of it
alpha = sqrt(alpha);
break;
-
+
case FALLOFF_INTERPOLATION_LINEAR:
//linear distance falloff
alpha = ( outer_radius - sqrt(mag_squared) ) / double_feather;
break;
-
+
case FALLOFF_SIGMOND:
default:
//linear distance falloff
alpha = 1.0 / (1 + exp(-(alpha*10-5)) );
break;
}
-
+
//If we're inverted, we need to invert the falloff value
if(invert)
alpha=1.0-alpha;*/
-
+
alpha = falloff_func(cache,mag_squared);
-
+
//Compose falloff value with amount from the composite layer, and that is the blend value
alpha *= get_amount();
-
+
return Color::blend(color,context.get_color(point),alpha,get_blend_method());
}
}
bool
Circle::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
-{
+{
// trivial case
if(is_disabled() || (radius==0 && invert==false))
return context.accelerated_render(surface,quality, renddesc, cb);
const Point br(renddesc.get_br());
const int w(renddesc.get_w());
const int h(renddesc.get_h());
-
+
const Real x_neg = tl[0] > br[0] ? -1 : 1;
const Real y_neg = tl[1] > br[1] ? -1 : 1;
-
+
// Width and Height of a pixel
const Real pw = (br[0] - tl[0]) / w;
const Real ph = (br[1] - tl[1]) / h;
-
+
// Increasing the feather amount by the size of
// a pixel will create an anti-aliased appearance
- const Real newfeather=feather + (abs(ph)+abs(pw))/4.0;
-
+ // don't render feathering at all when quality is 10
+ const Real newfeather = (quality == 10) ? 0 : feather + (abs(ph)+abs(pw))/4.0;
+
//int u,v;
int left = (int) floor( (pos[0] - x_neg*(radius+newfeather) - tl[0]) / pw );
int right = (int) ceil( (pos[0] + x_neg*(radius+newfeather) - tl[0]) / pw );
int top = (int) floor( (pos[1] - y_neg*(radius+newfeather) - tl[1]) / ph );
int bottom = (int) ceil( (pos[1] + y_neg*(radius+newfeather) - tl[1]) / ph );
-
+
//clip the rectangle bounds
if(left < 0)
left = 0;
right = w-1;
if(bottom >= h)
bottom = h-1;
-
+
const Real inner_radius = radius-newfeather>0 ? radius-newfeather : 0;
const Real outer_radius = radius+newfeather;
-
+
const Real inner_radius_sqd = inner_radius*inner_radius;
const Real outer_radius_sqd = outer_radius*outer_radius;
-
+
const Real diff_radii_sqd = 4*newfeather*std::max(newfeather,radius);//4.0*radius*newfeather;
const Real double_feather = newfeather * 2.0;
-
+
//Compile the temporary cache for the falloff calculations
FALLOFF_FUNC *func = GetFalloffFunc();
-
- const CircleDataCache cache =
+
+ const CircleDataCache cache =
{
inner_radius,outer_radius,
inner_radius_sqd,outer_radius_sqd,
diff_radii_sqd,double_feather
- };
-
+ };
+
//info("Circle: Initialized everything");
-
+
//let the rendering begin
SuperCallback supercb(cb,0,9000,10000);
-
+
//if it's a degenerate circle, do what we need to do, and then leave
if(left >= right || top >= bottom)
{
if(invert)
- {
+ {
if(get_amount() == 1 && get_blend_method() == Color::BLEND_STRAIGHT)
{
surface->set_wh(w,h);
{
if(cb)cb->error(strprintf(__FILE__"%d: Accelerated Renderer Failure",__LINE__));
return false;
- }
-
+ }
+
Surface::alpha_pen p(surface->begin(),get_amount(),_BlendFunc(get_blend_method()));
-
+
p.set_value(color);
p.put_block(h,w);
return true;
if(cb)cb->error(strprintf(__FILE__"%d: Accelerated Renderer Failure",__LINE__));
return false;
}
- return true;
+ return true;
}
}
-
+
if( (pos[0] - tl[0])*(pos[0] - tl[0]) + (pos[1] - tl[1])*(pos[1] - tl[1]) < inner_radius_sqd
&& (pos[0] - br[0])*(pos[0] - br[0]) + (pos[1] - br[1])*(pos[1] - br[1]) < inner_radius_sqd
&& (pos[0] - tl[0])*(pos[0] - tl[0]) + (pos[1] - br[1])*(pos[1] - br[1]) < inner_radius_sqd
surface->set_wh(w,h);
surface->fill(color);
return true;
- }
- }
+ }
+ }
}
-
- //info("Circle: Non degenerate, rasterize %c", invert);
+
+ //info("Circle: Non degenerate, rasterize %c", invert);
//we start in the middle of the left-top pixel
Real leftf = (left + 0.5)*pw + tl[0];
Real topf = (top + 0.5)*ph + tl[1];
-
+
//the looping variables
Real x,y;
int i,j;
if(cb)cb->error(strprintf(__FILE__"%d: Accelerated Renderer Failure",__LINE__));
return false;
}
-
+
//make topf and leftf relative to the center of the circle
leftf -= pos[0];
topf -= pos[1];
-
+
j = top;
y = topf;
-
+
//Loop over the valid y-values in the bounding square
for(;j <= bottom; j++, y += ph)
{
i = left;
x = leftf;
-
+
//for each y-value, Loop over the bounding x-values in the bounding square
for(;i <= right; i++, x += pw)
{
//for each pixel, figure out the distance and blend
Real r = x*x + y*y;
-
+
//if in the inner circle then the full color shows through
if(r <= inner_radius_sqd)
{
case FALLOFF_SQUARED:
myamount = (outer_radius_sqd - r) / diff_radii_sqd;
break;
-
+
case FALLOFF_SQRT:
myamount = (outer_radius - sqrt(r)) / double_feather;
myamount = sqrt(myamount);
break;
-
+
case FALLOFF_INTERPOLATION_LINEAR:
myamount = (outer_radius - sqrt(r)) / double_feather;
break;
-
+
case FALLOFF_SIGMOND:
default:
myamount = (outer_radius - sqrt(r)) / double_feather;
myamount = 1.0 / ( 1 + exp(-(myamount*10 - 5)) );
break;
}*/
-
+
Real myamount = func(cache,r);
//if(myamount<0.0)myamount=0.0;
//if(myamount>1.0)myamount=1.0;
myamount *= get_amount();
(*surface)[j][i] = Color::blend(color,(*surface)[j][i],myamount,get_blend_method());
- }
+ }
}
}
}
Surface background;
RendDesc desc(renddesc);
desc.set_flags(0);
-
+
int offset_x=0,offset_y=0;
-
+
//fill the surface with the background color initially
surface->set_wh(w,h);
surface->fill(color);
-
+
//then render the background to an alternate surface
if(get_amount() == 1 && get_blend_method() == Color::BLEND_STRAIGHT)
{
offset_x = left;
offset_y = top;
-
+
//if there is no background showing through we are done
if(right < left || bottom < top)
return true;
-
+
desc.set_subwindow(left,top,right-left+1,bottom-top+1);
-
+
// Render what is behind us
if(!context.accelerated_render(&background,quality,desc,&supercb))
{
right = w-1;
top = 0;
bottom = h-1;
-
+
leftf = /*0.5*pw +*/ tl[0];
topf = /*0.5*ph +*/ tl[1];
-
+
// Render what is behind us
if(!context.accelerated_render(&background,quality,renddesc,&supercb))
{
return false;
}
}
-
+
topf -= pos[1];
leftf-= pos[0];
-
+
j = top;
y = topf;
-
+
for(;j <= bottom; j++, y+=ph)
{
i = left;
x = leftf;
-
+
for(;i <= right; i++, x+=pw)
- {
+ {
Vector::value_type r = x*x + y*y;
-
+
if(r < inner_radius_sqd)
{
(*surface)[j][i] = background[j-offset_y][i-offset_x];
amount = 1.0 - ( 1.0/( 1 + exp(-(amount*10-5)) ) );
break;
}*/
-
+
Real amount = func(cache,r);
-
+
if(amount<0.0)amount=0.0;
if(amount>1.0)amount=1.0;
-
+
amount*=get_amount();
-
+
(*surface)[j][i]=Color::blend(color,background[j-offset_y][i-offset_x],amount,get_blend_method());
}else if(get_amount() != 1 || get_blend_method() != Color::BLEND_STRAIGHT)
{
- (*surface)[j][i]=Color::blend(color,background[j][i],get_amount(),get_blend_method());
- }
+ (*surface)[j][i]=Color::blend(color,background[j][i],get_amount(),get_blend_method());
+ }
}
}
}
);
return bounds & context.get_full_bounding_rect();
}
- return Rect::full_plane();
+ return Rect::full_plane();
}
return Layer_Composite::get_full_bounding_rect(context);
projects / synfig.git / blobdiff