/* === S Y N F I G ========================================================= */
/*! \file checkerboard.cpp
** \brief Implementation of the "Checkerboard" layer
**
** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
** Copyright (c) 2007, 2008 Chris Moore
** 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
*/
/* ========================================================================= */
/* === H E A D E R S ======================================================= */
#ifdef USING_PCH
# include "pch.h"
#else
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <algorithm>
#include <synfig/string.h>
#include <synfig/time.h>
#include <synfig/context.h>
#include <synfig/paramdesc.h>
#include <synfig/renddesc.h>
#include <synfig/surface.h>
#include <synfig/value.h>
#include <synfig/valuenode.h>
#include <synfig/segment.h>
#include <synfig/rendering/common/task/tasktransformation.h>
#include <synfig/rendering/common/task/taskblend.h>
#include <synfig/rendering/software/task/tasksw.h>
#include "checkerboard.h"
#include <synfig/localization.h>
#include <synfig/general.h>
#endif
using namespace synfig;
/* === M A C R O S ========================================================= */
/* === G L O B A L S ======================================================= */
SYNFIG_LAYER_INIT(CheckerBoard);
SYNFIG_LAYER_SET_NAME(CheckerBoard,"checker_board");
SYNFIG_LAYER_SET_LOCAL_NAME(CheckerBoard,N_("Checkerboard"));
SYNFIG_LAYER_SET_CATEGORY(CheckerBoard,N_("Geometry"));
SYNFIG_LAYER_SET_VERSION(CheckerBoard,"0.1");
SYNFIG_LAYER_SET_CVS_ID(CheckerBoard,"$Id$");
/* === P R O C E D U R E S ================================================= */
namespace {
class TaskCheckerBoard: public rendering::Task, public rendering::TaskInterfaceTransformation
{
public:
typedef etl::handle<TaskCheckerBoard> Handle;
static Token token;
virtual Token::Handle get_token() const { return token.handle(); }
Color color;
bool antialias;
rendering::Holder<rendering::TransformationAffine> transformation;
TaskCheckerBoard(): antialias(true) { }
virtual const rendering::Transformation::Handle get_transformation() const
{ return transformation.handle(); }
};
class TaskCheckerBoardSW: public TaskCheckerBoard, public rendering::TaskSW,
public rendering::TaskInterfaceBlendToTarget,
public rendering::TaskInterfaceSplit
{
public:
typedef etl::handle<TaskCheckerBoardSW> Handle;
static Token token;
virtual Token::Handle get_token() const { return token.handle(); }
virtual void on_target_set_as_source() {
Task::Handle &subtask = sub_task(0);
if ( subtask
&& subtask->target_surface == target_surface
&& !Color::is_straight(blend_method) )
{
trunc_by_bounds();
subtask->source_rect = source_rect;
subtask->target_rect = target_rect;
}
}
virtual Color::BlendMethodFlags get_supported_blend_methods() const
{ return Color::BLEND_METHODS_ALL; }
virtual bool run(RunParams&) const {
if (!is_valid())
return true;
Vector ppu = get_pixels_per_unit();
Matrix bounds_transfromation;
bounds_transfromation.m00 = ppu[0];
bounds_transfromation.m11 = ppu[1];
bounds_transfromation.m20 = target_rect.minx - ppu[0]*source_rect.minx;
bounds_transfromation.m21 = target_rect.miny - ppu[1]*source_rect.miny;
Matrix matrix = bounds_transfromation * transformation->matrix;
Matrix inv_matrix = matrix.get_inverted();
int tw = target_rect.get_width();
Vector dx = inv_matrix.axis_x();
Vector dy = inv_matrix.axis_y() - dx*(Real)tw;
Vector p = inv_matrix.get_transformed( Vector((Real)target_rect.minx, (Real)target_rect.miny) );
LockWrite la(this);
if (!la)
return false;
Surface::alpha_pen apen(la->get_surface().get_pen(target_rect.minx, target_rect.miny));
ColorReal amount = blend ? this->amount : ColorReal(1.0);
apen.set_blend_method(blend ? blend_method : Color::BLEND_COMPOSITE);
Color c = color;
if (antialias) {
ColorReal kx(matrix.axis_x().mag()*0.5);
ColorReal ky(matrix.axis_y().mag()*0.5);
for(int iy = target_rect.miny; iy < target_rect.maxy; ++iy, p += dy, apen.inc_y(), apen.dec_x(tw))
for(int ix = target_rect.minx; ix < target_rect.maxx; ++ix, p += dx, apen.inc_x()) {
p[0] -= floor(p[0]);
p[1] -= floor(p[1]);
ColorReal px = p[0]*ColorReal(2);
px -= floor(px);
px = std::min(px, ColorReal(1) - px)*kx;
ColorReal py = p[1]*ColorReal(2);
py -= floor(py);
py = std::min(py, ColorReal(1) - py)*ky;
ColorReal a = std::min(px, py);
if ((p[0] < 0.5) != (p[1] < 0.5)) a = -a;
a = std::max(ColorReal(0), std::min(ColorReal(1), a + ColorReal(0.5)));
c.set_a(color.get_a()*a);
apen.put_value(c, amount);
}
} else {
for(int iy = target_rect.miny; iy < target_rect.maxy; ++iy, p += dy, apen.inc_y(), apen.dec_x(tw))
for(int ix = target_rect.minx; ix < target_rect.maxx; ++ix, p += dx, apen.inc_x()) {
p[0] -= floor(p[0]);
p[1] -= floor(p[1]);
ColorReal a((p[0] < 0.5) == (p[1] < 0.5) ? 1.0 : 0.0);
c.set_a(color.get_a()*a);
apen.put_value(c, amount);
}
}
return true;
}
};
rendering::Task::Token TaskCheckerBoard::token(
DescAbstract<TaskCheckerBoard>("CheckerBoard") );
rendering::Task::Token TaskCheckerBoardSW::token(
DescReal<TaskCheckerBoardSW, TaskCheckerBoard>("CheckerBoardSW") );
} // namespace
/* === M E T H O D S ======================================================= */
CheckerBoard::CheckerBoard():
Layer_Composite (1.0,Color::BLEND_COMPOSITE),
param_color (ValueBase(Color::black())),
param_origin (ValueBase(Point(0.125,0.125))),
param_size (ValueBase(Point(0.25,0.25)))
{
SET_INTERPOLATION_DEFAULTS();
SET_STATIC_DEFAULTS();
}
inline bool
CheckerBoard::point_test(const synfig::Point& getpos)const
{
Point origin=param_origin.get(Point());
Point size=param_size.get(Point());
int val=((int)((getpos[0]-origin[0])/size[0])+(int)((getpos[1]-origin[1])/size[1]));
if(getpos[0]-origin[0] < 0.0)
val++;
if(getpos[1]-origin[1] < 0.0)
val++;
return val&1;
}
bool
CheckerBoard::set_param(const String ¶m, const ValueBase &value)
{
IMPORT_VALUE_PLUS(param_color,
{
Color color(param_color.get(Color()));
if (color.get_a() == 0)
{
if(converted_blend_)
{
set_blend_method(Color::BLEND_ALPHA_OVER);
color.set_a(1);
param_color.set(color);
}
else
transparent_color_ = true;
}
}
);
IMPORT_VALUE(param_origin);
IMPORT_VALUE(param_size);
if(param=="pos")
return set_param("origin", value);
for(int i=0;i<2;i++)
if(param==etl::strprintf("pos[%d]",i) && value.get_type()==type_real)
{
Point p=param_origin.get(Point());
p[i]=value.get(Real());
param_origin.set(p);
return true;
}
return Layer_Composite::set_param(param,value);
}
ValueBase
CheckerBoard::get_param(const String ¶m)const
{
EXPORT_VALUE(param_color);
EXPORT_VALUE(param_origin);
EXPORT_VALUE(param_size);
EXPORT_NAME();
EXPORT_VERSION();
return Layer_Composite::get_param(param);
}
Layer::Vocab
CheckerBoard::get_param_vocab()const
{
Layer::Vocab ret(Layer_Composite::get_param_vocab());
ret.push_back(ParamDesc("color")
.set_local_name(_("Color"))
.set_description(_("Color of checkers"))
);
ret.push_back(ParamDesc("origin")
.set_local_name(_("Origin"))
.set_description(_("Center of the checkers"))
);
ret.push_back(ParamDesc("size")
.set_local_name(_("Size"))
.set_description(_("Size of checkers"))
.set_origin("origin")
);
return ret;
}
synfig::Layer::Handle
CheckerBoard::hit_check(synfig::Context context, const synfig::Point &getpos)const
{
if(get_amount()!=0.0 && point_test(getpos))
{
synfig::Layer::Handle tmp;
if(get_blend_method()==Color::BLEND_BEHIND && (tmp=context.hit_check(getpos)))
return tmp;
if(Color::is_onto(get_blend_method()) && !(tmp=context.hit_check(getpos)))
return 0;
return const_cast<CheckerBoard*>(this);
}
else
return context.hit_check(getpos);
}
Color
CheckerBoard::get_color(Context context, const Point &getpos)const
{
Color color=param_color.get(Color());
if(get_amount()!=0.0 && point_test(getpos))
{
if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
return color;
else
return Color::blend(color,context.get_color(getpos),get_amount(),get_blend_method());
}
else
return Color::blend(Color::alpha(),context.get_color(getpos),get_amount(),get_blend_method());
}
bool
CheckerBoard::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
{
RENDER_TRANSFORMED_IF_NEED(__FILE__, __LINE__)
Color color=param_color.get(Color());
SuperCallback supercb(cb,0,9500,10000);
if(!context.accelerated_render(surface,quality,renddesc,&supercb))
return false;
if(get_amount()==0)
return true;
int x,y;
const Point tl(renddesc.get_tl());
Point pos;
const int w(surface->get_w());
const int h(surface->get_h());
const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
Surface::alpha_pen apen(surface->begin());
apen.set_alpha(get_amount());
apen.set_blend_method(get_blend_method());
apen.set_value(color);
for(y=0,pos[1]=tl[1];y<h;y++,apen.inc_y(),apen.dec_x(x),pos[1]+=ph)
for(x=0,pos[0]=tl[0];x<w;x++,apen.inc_x(),pos[0]+=pw)
if(point_test(pos))
apen.put_value();
// Mark our progress as finished
if(cb && !cb->amount_complete(10000,10000))
return false;
return true;
}
//////////
bool
CheckerBoard::accelerated_cairorender(Context context, cairo_t *cr, int quality, const RendDesc &renddesc, ProgressCallback *cb)const
{
Color color=param_color.get(Color());
Point origin=param_origin.get(Point());
Point size=param_size.get(Point());
SuperCallback supercb(cb,0,9500,10000);
if(!is_solid_color())
if(!context.accelerated_cairorender(cr,quality,renddesc,&supercb))
return false;
if(get_amount()==0)
return true;
const float r(color.get_r());
const float g(color.get_g());
const float b(color.get_b());
const float a(color.get_a());
const Point tl(renddesc.get_tl());
const Point br(renddesc.get_br());
const int w(renddesc.get_w());
const int h(renddesc.get_h());
// Width and Height of a pixel
const Real pw = (br[0] - tl[0]) / w;
const Real ph = (br[1] - tl[1]) / h;
// These are translation and scale values
const double sx(1/pw);
const double sy(1/ph);
Point newsize(size);
// Normalize the size
if(newsize[0] <0.0) newsize[0]=-newsize[0];
if(newsize[1] <0.0) newsize[1]=-newsize[1];
// Calculate one average size that fits in a number integer of pixels
newsize[0]=((int)(2.0*newsize[0]*sx))/(2.0*sx);
newsize[1]=((int)(2.0*newsize[1]*sy))/(2.0*sy);
if(!context.accelerated_cairorender(cr,quality,renddesc,cb))
{
if(cb)cb->error(etl::strprintf(__FILE__"%d: Accelerated Cairo Renderer Failure",__LINE__));
return false;
}
// Now let's render the minimum checkerboard in other surface
// Initially I'll fill it completely with the alpha color
// Create a similar image with the same dimensions than the minimum checkerboard
RendDesc desc(renddesc);
// this will modify the w and h values in pixels.
desc.set_flags(RendDesc::PX_ASPECT|RendDesc::IM_SPAN);
desc.set_tl_br(Point(-newsize[0], +newsize[1]), Point(+newsize[0], -newsize[1]));
cairo_surface_t* subimage=cairo_surface_create_similar(cairo_get_target(cr), CAIRO_CONTENT_COLOR_ALPHA, desc.get_w(), desc.get_h());
cairo_t* subcr=cairo_create(subimage);
cairo_save(subcr);
cairo_set_source_rgba(subcr, r, g, b, a);
cairo_rectangle(subcr, 0, 0, desc.get_w()/2, desc.get_h()/2);
cairo_clip(subcr);
cairo_paint(subcr);
cairo_restore(subcr);
cairo_save(subcr);
cairo_set_source_rgba(subcr, r, g, b, a);
cairo_rectangle(subcr, desc.get_w()/2, desc.get_h()/2, desc.get_w()/2, desc.get_h()/2);
cairo_clip(subcr);
cairo_paint(subcr);
cairo_restore(subcr);
cairo_save(cr);
cairo_translate(cr, origin[0], origin[1]);
cairo_scale(cr, 1/sx, 1/sy);
cairo_pattern_t* pattern=cairo_pattern_create_for_surface(subimage);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
cairo_set_source(cr, pattern);
if(is_solid_color())
{
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_paint_with_alpha(cr, get_amount());
}
else
{
cairo_paint_with_alpha_operator(cr, get_amount(), get_blend_method());
}
cairo_restore(cr);
cairo_pattern_destroy(pattern);
// Mark our progress as finished
if(cb && !cb->amount_complete(10000,10000))
return false;
return true;
}
//////////
rendering::Task::Handle
CheckerBoard::build_composite_task_vfunc(ContextParams /*context_params*/)const
{
Color color = param_color.get(Color());
Point origin = param_origin.get(Point());
Point size = param_size.get(Point());
origin[0] += size[0]; // make first cell empty (by history)
size *= 2.0; // task expects repeat period instead of cell size
TaskCheckerBoard::Handle task(new TaskCheckerBoard());
task->color = color;
task->transformation->matrix = Matrix().set_translate(origin)
* Matrix().set_scale(size);
return task;
}