/* === S Y N F I G ========================================================= */
/*! \file synfig/render.cpp
** \brief Renderer
**
** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
** Copyright (c) 2012-2013 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
*/
/* ========================================================================= */
/* === H E A D E R S ======================================================= */
#ifdef USING_PCH
# include "pch.h"
#else
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <cassert>
#include <ETL/handle>
#include "render.h"
#include "general.h"
#include <synfig/localization.h>
#include "canvas.h"
#include "cairo_renddesc.h"
#include "context.h"
#include "surface.h"
#include "target.h"
#endif
using namespace std;
using namespace synfig;
using namespace etl;
/* === M A C R O S ========================================================= */
/* === P R O C E D U R E S ================================================= */
bool
synfig::parametric_render(
Context context,
Surface &surface,
const RendDesc &desc,
ProgressCallback *callback
)
{
Point::value_type
u,v, // Current location in image
su,sv, // Starting locations
du, dv, // Distance between pixels
dsu,dsv; // Distance between subpixels
bool
no_clamp=!desc.get_clamp();
int
w(desc.get_w()),
h(desc.get_h()),
a(desc.get_antialias());
Point
tl(desc.get_tl()),
br(desc.get_br());
//Gamma
// gamma(desc.get_gamma());
int
x,y, // Current location on output bitmap
x2,y2; // Subpixel counters
Color::value_type
pool; // Alpha pool (for correct alpha antialiasing)
// Calculate the number of channels
//chan=pixel_size(desc.get_pixel_format());
// Calculate the distance between pixels
du=(br[0]-tl[0])/(Point::value_type)w;
dv=(br[1]-tl[1])/(Point::value_type)h;
// Calculate the distance between sub pixels
dsu=du/(Point::value_type)a;
dsv=dv/(Point::value_type)a;
// Calculate the starting points
//su=tl[0]+(du-dsu)/(Point::value_type)2.0;
//sv=tl[1]-(dv-dsv)/(Point::value_type)2.0;
su=tl[0];
sv=tl[1];
surface.set_wh(desc.get_w(),desc.get_h());
assert(surface);
// Loop through all horizontal lines
for(y=0,v=sv;y<h;y++,v+=dv)
{
// Set the current pixel pointer
// to the start of the line
Color *colordata=surface[y];
assert(colordata);
// If we have a callback that we need
// to report to, do so now.
if(callback)
if( callback->amount_complete(y,h) == false )
{
// If the callback returns false,
// then the render has been aborted.
return false;
}
// Loop through every pixel in row
for(x=0,u=su;x<w;x++,u+=du)
{
Color &c(*(colordata++));
c=Color::alpha();
// Loop through all subpixels
for(y2=0,pool=0;y2<a;y2++)
for(x2=0;x2<a;x2++)
{
Color color=context.get_color(
Point(
u+(Point::value_type)(x2)*dsu,
v+(Point::value_type)(y2)*dsv
)
);
if(!no_clamp)
{
color=color.clamped();
c+=color*color.get_a();
pool+=color.get_a();
}
else
{
c+=color*color.get_a();
pool+=color.get_a();
}
}
if(pool)
c/=pool;
}
}
// Give the callback one more last call,
// this time with the full height as the
// current line
if(callback)
callback->amount_complete(h,h);
// Report our success
return(true);
}
bool
synfig::render(
Context context,
Target_Scanline::Handle target,
const RendDesc &desc,
ProgressCallback *callback)
{
Point::value_type
u,v, // Current location in image
su,sv, // Starting locations
du, dv, // Distance between pixels
dsu,dsv; // Distance between subpixels
bool
no_clamp=!desc.get_clamp();
int
w(desc.get_w()),
h(desc.get_h()),
a(desc.get_antialias());
Point
tl(desc.get_tl()),
br(desc.get_br());
//Gamma
// gamma(desc.get_gamma());
int
x,y, // Current location on output bitmap
x2,y2; // Subpixel counters
Color::value_type
pool; // Alpha pool (for correct alpha antialiasing)
assert(target);
// If we do not have a target then bail
if(!target)
return false;
// Calculate the number of channels
//chan=pixel_size(desc.get_pixel_format());
// Calculate the distance between pixels
du=(br[0]-tl[0])/(Point::value_type)w;
dv=(br[1]-tl[1])/(Point::value_type)h;
// Calculate the distance between sub pixels
dsu=du/(Point::value_type)a;
dsv=dv/(Point::value_type)a;
// Calculate the starting points
su=tl[0]+(du-dsu)/(Point::value_type)2.0;
sv=tl[1]-(dv-dsv)/(Point::value_type)2.0;
// Mark the start of a new frame.
if(!target->start_frame(callback))
return false;
// Loop through all horizontal lines
for(y=0,v=sv;y<h;y++,v+=dv)
{
// Set the current pixel pointer
// to the start of the line
Color *colordata=target->start_scanline(y);
if(!colordata)
{
if(callback)callback->error(_("Target panic"));
else throw(string(_("Target panic")));
return false;
}
// If we have a callback that we need
// to report to, do so now.
if(callback)
if( callback->amount_complete(y,h) == false )
{
// If the callback returns false,
// then the render has been aborted.
// Exit gracefully.
target->end_scanline();
target->end_frame();
return false;
}
// Loop through every pixel in row
for(x=0,u=su;x<w;x++,u+=du)
{
Color &c(*(colordata++));
c=Color::alpha();
// Loop through all subpixels
for(y2=0,pool=0;y2<a;y2++)
for(x2=0;x2<a;x2++)
{
Color color=context.get_color(
Point(
u+(Point::value_type)(x2)*dsu,
v+(Point::value_type)(y2)*dsv
)
);
if(!no_clamp)
{
color=color.clamped();
c+=color*color.get_a();
pool+=color.get_a();
}
else
{
c+=color*color.get_a();
pool+=color.get_a();
}
}
if(pool)
c/=pool;
}
// Send the buffer to the render target.
// If anything goes wrong, cleanup and bail.
if(!target->end_scanline())
{
if(callback)callback->error(_("Target panic"));
else throw(string(_("Target panic")));
return false;
}
}
// Finish up the target's frame
target->end_frame();
// Give the callback one more last call,
// this time with the full height as the
// current line
if(callback)
callback->amount_complete(h,h);
// Report our success
return(true);
}
//////////
// Cairo_Target needs to have its RendDesc already set.
bool
synfig::cairorender(
Context context,
cairo_surface_t* surface,
const RendDesc &desc,
ProgressCallback *callback)
{
Point::value_type
u,v, // Current location in image
su,sv, // Starting locations
du, dv, // Distance between pixels
dsu,dsv; // Distance between subpixels
int
w(desc.get_w()),
h(desc.get_h()),
a(desc.get_antialias());
Point
tl(desc.get_tl()),
br(desc.get_br());
//Gamma
// gamma(desc.get_gamma());
int
x,y, // Current location on output bitmap
x2,y2; // Subpixel counters
Color::value_type
pool; // Alpha pool (for correct alpha antialiasing)
// Calculate the number of channels
//chan=pixel_size(desc.get_pixel_format());
// Calculate the distance between pixels
du=(br[0]-tl[0])/(Point::value_type)w;
dv=(br[1]-tl[1])/(Point::value_type)h;
// Calculate the distance between sub pixels
dsu=du/(Point::value_type)a;
dsv=dv/(Point::value_type)a;
// Calculate the starting points
su=tl[0]+(du-dsu)/(Point::value_type)2.0;
sv=tl[1]-(dv-dsv)/(Point::value_type)2.0;
// Create a CairoSurface from the cairo_surface_t
CairoSurface csurface(surface);
// map the cairo_surface_t to the etl::surface
csurface.map_cairo_image();
// Loop through all horizontal lines
for(y=0,v=sv;y<h;y++,v+=dv)
{
// If we have a callback that we need
// to report to, do so now.
if(callback)
if( callback->amount_complete(y,h) == false )
{
// If the callback returns false,
// then the render has been aborted.
// Exit gracefully.
csurface.unmap_cairo_image();
return false;
}
// Loop through every pixel in row
for(x=0,u=su;x<w;x++,u+=du)
{
Color c(Color::alpha());
// Loop through all subpixels
for(y2=0,pool=0;y2<a;y2++)
for(x2=0;x2<a;x2++)
{
Color color=Color(context.get_cairocolor(
Point(
u+(Point::value_type)(x2)*dsu,
v+(Point::value_type)(y2)*dsv
)
));
color=color.clamped();
c+=color*color.get_a();
pool+=color.get_a();
}
if(pool)
c/=pool;
// Once the pixel is subsampled then I premultiply by alpha and pass
// it to the CairoSurface
csurface[y][x]=CairoColor(c).premult_alpha();
}
}
// unmap the rendered surface to the cairo_surface_t
csurface.unmap_cairo_image();
// Give the callback one more last call,
// this time with the full height as the
// current line
if(callback)
callback->amount_complete(h,h);
// Report our success
return(true);
}
////////
bool
synfig::cairorender(Context context,
cairo_t* cr,
const RendDesc &desc,
ProgressCallback *cb)
{
RendDesc renddesc(desc);
// Untransform the render desc
if(!cairo_renddesc_untransform(cr, renddesc))
return false;
const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
const Point tl(renddesc.get_tl());
const int w(renddesc.get_w());
const int h(renddesc.get_h());
cairo_surface_t *surface;
surface=cairo_surface_create_similar(cairo_get_target(cr), CAIRO_CONTENT_COLOR_ALPHA, w, h);
if(!cairorender(context, surface, renddesc, cb))
{
cairo_surface_destroy(surface);
return false;
}
cairo_save(cr);
cairo_translate(cr, tl[0], tl[1]);
cairo_scale(cr, pw, ph);
cairo_set_source_surface(cr, surface, 0, 0);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_paint(cr);
cairo_restore(cr);
cairo_surface_destroy(surface);
// Mark our progress as finished
if(cb && !cb->amount_complete(10000,10000))
return false;
return true;
}