/* === S Y N F I G ========================================================= */
/*! \file supersample.cpp
** \brief Implementation of the "Super Sample" layer
**
** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
** Copyright (c) 2011-2013 Carlos López
**
** 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
**
** === N O T E S ===========================================================
**
** ========================================================================= */
/* === H E A D E R S ======================================================= */
#ifdef USING_PCH
# include "pch.h"
#else
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <synfig/localization.h>
#include <synfig/general.h>
#include <synfig/context.h>
#include <synfig/cairo_renddesc.h>
#include <synfig/paramdesc.h>
#include <synfig/renddesc.h>
#include <synfig/render.h>
#include <synfig/rendering/common/task/tasktransformation.h>
#include <synfig/string.h>
#include <synfig/surface.h>
#include <synfig/target.h>
#include <synfig/target_scanline.h>
#include <synfig/time.h>
#include <synfig/value.h>
#include <synfig/valuenode.h>
#include "supersample.h"
#endif
using namespace std;
using namespace etl;
using namespace synfig;
using namespace modules;
using namespace lyr_std;
/* === M A C R O S ========================================================= */
/* === G L O B A L S ======================================================= */
SYNFIG_LAYER_INIT(SuperSample);
SYNFIG_LAYER_SET_NAME(SuperSample,"super_sample");
SYNFIG_LAYER_SET_LOCAL_NAME(SuperSample,N_("Super Sample"));
SYNFIG_LAYER_SET_CATEGORY(SuperSample,N_("Other"));
SYNFIG_LAYER_SET_VERSION(SuperSample,"0.1");
SYNFIG_LAYER_SET_CVS_ID(SuperSample,"$Id$");
/* === P R O C E D U R E S ================================================= */
/* === M E T H O D S ======================================================= */
SuperSample::SuperSample():
param_width(ValueBase(int(2))),
param_height(ValueBase(int(2)))
{
param_scanline=ValueBase(false);
param_alpha_aware=ValueBase(true);
SET_INTERPOLATION_DEFAULTS();
SET_STATIC_DEFAULTS();
}
bool
SuperSample::set_param(const String & param, const ValueBase &value)
{
IMPORT_VALUE_PLUS(param_width,
{
int width=param_width.get(int());
if(value.get(int()) < 1) width = 1;
else width=value.get(int());
param_width.set(width);
return true;
}
);
IMPORT_VALUE_PLUS(param_height,
{
int height=param_height.get(int());
if(value.get(int()) < 1) height = 1;
else height=value.get(int());
param_height.set(height);
return true;
}
);
IMPORT_VALUE(param_scanline);
IMPORT_VALUE(param_alpha_aware);
return false;
}
ValueBase
SuperSample::get_param(const String& param)const
{
EXPORT_VALUE(param_width);
EXPORT_VALUE(param_height);
EXPORT_VALUE(param_scanline);
EXPORT_VALUE(param_alpha_aware);
EXPORT_NAME();
EXPORT_VERSION();
return ValueBase();
}
RendDesc
SuperSample::get_sub_renddesc_vfunc(const RendDesc &renddesc) const
{
int width=param_width.get(int());
int height=param_height.get(int());
RendDesc desc(renddesc);
desc.clear_flags();
desc.set_wh(desc.get_w()*width,desc.get_h()*height);
return desc;
}
bool
SuperSample::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
{
RENDER_TRANSFORMED_IF_NEED(__FILE__, __LINE__)
int width=param_width.get(int());
int height=param_height.get(int());
bool scanline=param_scanline.get(bool());
bool alpha_aware=param_alpha_aware.get(bool());
// don't bother supersampling if our quality is too low.
if(quality>=10)
return context.accelerated_render(surface,quality,renddesc,cb);
RendDesc desc = get_sub_renddesc(renddesc);
SuperCallback subcb(cb,1,9000,10000);
SuperCallback stagetwo(cb,9000,10000,10000);
Surface tempsurface;
// Render the scene
if(scanline)
{
handle<Target_Scanline> target=surface_target_scanline(&tempsurface);
if(!target)
{
if(cb)cb->error(_("Unable to create SurfaceTarget"));
return false;
}
target->set_rend_desc(&desc);
if(!render(context.get_previous(),target,desc,&subcb))
{
if(cb)cb->error(strprintf(__FILE__"%d: Scanline Renderer Failure",__LINE__));
return false;
}
}
else
if(!context.accelerated_render(&tempsurface,quality,desc,cb))
{
//if(cb)cb->error(strprintf(__FILE__"%d: Accelerated Renderer Failure",__LINE__));
return false;
}
surface->set_wh(renddesc.get_w(),renddesc.get_h());
Surface::pen pen(surface->begin());
Surface::pen temp_pen(tempsurface.begin());
if(cb && !cb->amount_complete(9001,10000)) return false;
if(alpha_aware)
{
int x,y,u,v;
float sum;
Color pool;
for(y=0;y<surface->get_h();y++,pen.inc_y(),pen.dec_x(x),temp_pen.inc_y(height),temp_pen.dec_x(x*width))
{
for(x=0;x<surface->get_w();x++,pen.inc_x(),temp_pen.inc_x(width))
{
pool=Color(0,0,0,0);
sum=0;
for(v=0;v<height;v++,temp_pen.inc_y(),temp_pen.dec_x(u))
for(u=0;u<width;u++,temp_pen.inc_x())
{
pool+=temp_pen.get_value()*temp_pen.get_value().get_a();
sum+=temp_pen.get_value().get_a();
}
temp_pen.dec_y(v);
if(sum)
{
pool/=sum;
pool.set_a(sum/float(width*height));
pen.put_value(pool);
}
else
pen.put_value(Color::alpha());
}
if((y&31)==0 && cb)
{
if(!stagetwo.amount_complete(y,surface->get_h()))
return false;
}
}
}
else
{
int x,y,u,v;
Color pool;
float multiplier=1.0f/float(width*height);
for(y=0;y<surface->get_h();y++,pen.inc_y(),pen.dec_x(x),temp_pen.inc_y(height),temp_pen.dec_x(x*width))
{
for(x=0;x<surface->get_w();x++,pen.inc_x(),temp_pen.inc_x(width))
{
pool=Color(0,0,0,0);
for(v=0;v<height;v++,temp_pen.inc_y(),temp_pen.dec_x(u))
for(u=0;u<width;u++,temp_pen.inc_x())
pool+=temp_pen.get_value();
temp_pen.dec_y(v);
pen.put_value(pool*multiplier);
}
if((y&31)==0 && cb)
{
if(!stagetwo.amount_complete(y,surface->get_h()))
return false;
}
}
}
if(cb && !cb->amount_complete(10000,10000)) return false;
return true;
}
////
bool
SuperSample::accelerated_cairorender(Context context, cairo_t *cr, int quality, const RendDesc &renddesc, ProgressCallback *cb)const
{
int width=param_width.get(int());
int height=param_height.get(int());
// don't bother supersampling if our quality is too low.
if(quality>=10 || (width==1 && height==1))
return context.accelerated_cairorender(cr,quality,renddesc,cb);
RendDesc desc(renddesc);
// Untransform the render desc
if(!cairo_renddesc_untransform(cr, desc))
return false;
//grab values before expand
const double pw=desc.get_pw();
const double ph=desc.get_ph();
const double tlx=desc.get_tl()[0];
const double tly=desc.get_tl()[1];
// Expand the renddesc
desc.clear_flags();
desc.set_wh(desc.get_w()*width,desc.get_h()*height);
// New expanded desc values
const int ww=desc.get_w();
const int wh=desc.get_h();
const double wtlx=desc.get_tl()[0];
const double wtly=desc.get_tl()[1];
const double wpw=desc.get_pw();
const double wph=desc.get_ph();
cairo_surface_t* tempsurface=cairo_surface_create_similar(cairo_get_target(cr), CAIRO_CONTENT_COLOR_ALPHA, ww, wh);
cairo_t* tempcr=cairo_create(tempsurface);
cairo_scale(tempcr, 1/wpw, 1/wph);
cairo_translate(tempcr, -wtlx, -wtly);
// Render the scene
if(!context.accelerated_cairorender(tempcr,quality,desc,cb))
{
if(cb)cb->error(strprintf(__FILE__"%d: Accelerated Renderer Failure",__LINE__));
return false;
}
cairo_destroy(tempcr);
// Calculate the scales values
float scalex=1.0/width;
float scaley=1.0/height;
// Calculate the cairo filter based on quality
cairo_filter_t filter;
cairo_antialias_t anti;
switch(quality)
{
case 1:
case 2:
case 3:
case 4:
case 5: // Best
filter=CAIRO_FILTER_BEST;
anti=CAIRO_ANTIALIAS_BEST;
break;
case 6:
case 7:
case 8: // Good
filter=CAIRO_FILTER_GOOD;
anti=CAIRO_ANTIALIAS_GOOD;
break;
case 9: // Fast
default:
filter=CAIRO_FILTER_FAST;
anti=CAIRO_ANTIALIAS_FAST;
break;
}
cairo_save(cr);
cairo_translate(cr, tlx, tly);
cairo_scale(cr, pw, ph);
cairo_scale(cr, scalex, scaley);
cairo_set_source_surface(cr, tempsurface, 0,0);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_pattern_set_filter(cairo_get_source(cr), filter);
cairo_set_antialias(cr, anti);
cairo_paint(cr);
cairo_restore(cr);
cairo_surface_destroy(tempsurface);
return true;
}
////
Layer::Vocab
SuperSample::get_param_vocab(void)const
{
Layer::Vocab ret;
ret.push_back(ParamDesc("width")
.set_local_name(_("Width"))
.set_description(_("Width of sample area (In pixels)"))
);
ret.push_back(ParamDesc("height")
.set_local_name(_("Height"))
.set_description(_("Height of sample area (In pixels)"))
);
ret.push_back(ParamDesc("scanline")
.set_local_name(_("Use Parametric"))
.set_description(_("Use the Parametric Renderer"))
);
ret.push_back(ParamDesc("alpha_aware")
.set_local_name(_("Be Alpha Safe"))
.set_description(_("Avoid alpha artifacts when checked"))
);
return ret;
}
Rect
SuperSample::get_bounding_rect(Context context)const
{
return context.get_full_bounding_rect();
}
rendering::Task::Handle
SuperSample::build_rendering_task_vfunc(Context context)const
{
int width = param_width.get(int());
int height = param_height.get(int());
if (width < 1) width = 1;
if (height < 1) height = 1;
rendering::Task::Handle sub_task = context.build_rendering_task();
if (width == 1 && height == 1)
return sub_task;
rendering::TaskTransformationAffine::Handle task_transformation(new rendering::TaskTransformationAffine());
task_transformation->supersample[0] = width;
task_transformation->supersample[1] = height;
task_transformation->sub_task() = sub_task;
return task_transformation;
}