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/**************************************************************************/
/* Copyright 2012 Tim Day */
/* */
/* This file is part of Evolvotron */
/* */
/* Evolvotron 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 3 of the License, or */
/* (at your option) any later version. */
/* */
/* Evolvotron 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. */
/* */
/* You should have received a copy of the GNU General Public License */
/* along with Evolvotron. If not, see <http://www.gnu.org/licenses/>. */
/**************************************************************************/
/*! \file
\brief Implementation of class MutatableImageComputer.
*/
#include "libevolvotron_precompiled.h"
#include "mutatable_image_computer.h"
#include "mutatable_image.h"
#include "mutatable_image_computer_farm.h"
#include "mutatable_image_computer_task.h"
#include "platform_specific.h"
MutatableImageComputer::MutatableImageComputer(MutatableImageComputerFarm* frm,int niceness)
:
#ifndef NDEBUG
InstanceCounted(typeid(this).name(),false),
#endif
_farm(frm),
_niceness(niceness),
_r01(23) // Seed pretty unimportant; only used for sample jitter
{
start();
}
MutatableImageComputer::~MutatableImageComputer()
{
std::clog << "Deleting a computer...\n";
kill();
wait();
_task.reset();
std::clog << "...deleted a computer\n";
}
/*! Compute threads run this method until killed (probably by the destructor being invoked by the original spawning thread.
*/
void MutatableImageComputer::run()
{
std::clog << "Thread starting\n";
// Lower compute thread priority slightly; computing yet more stuff
// is less important than displaying the results we've got so far.
add_thread_niceness(_niceness);
// Run until something sets the kill flag
while(!communications().kill())
{
// If we don't have a task try and get one. This will block or return null.
if (task()==0)
{
_task=farm()->pop_todo(*this);
}
if (task())
{
// Careful, we could be given an already aborted task
if (!task()->aborted())
{
while (!communications().kill_or_abort_or_defer() && !task()->completed())
{
XYZ accumulated_colour=task()->image_function()->get_rgb
(
task()->fragment_origin().width()+task()->current_col(),
task()->fragment_origin().height()+task()->current_row(),
task()->current_frame(),
task()->whole_image_size().width(),
task()->whole_image_size().height(),
task()->frames(),
(task()->jittered_samples() ? &_r01 : 0),
task()->multisample_grid()
);
const uint col0=lrint(accumulated_colour.x());
const uint col1=lrint(accumulated_colour.y());
const uint col2=lrint(accumulated_colour.z());
task()->images()[task()->current_frame()].setPixel(task()->current_col(),task()->current_row(),((col0<<16)|(col1<<8)|(col2)));
task()->pixel_advance();
}
}
// Maybe should capture copies of the flags for use here
if (!communications().kill())
{
if (communications().defer() && !communications().abort())
{
farm()->push_todo(task());
communications().defer(false);
_task.reset();
}
else
{
if (communications().abort())
{
task()->abort();
}
communications().defer(false);
communications().abort(false);
farm()->push_done(task());
_task.reset();
}
}
}
}
std::clog << "Thread shutting down\n";
}
bool MutatableImageComputer::defer_if_less_important_than(uint pri)
{
const boost::shared_ptr<const MutatableImageComputerTask> task_tmp=_task;
if (task_tmp && task_tmp->priority()>pri)
{
communications().defer(true);
return true;
}
else
{
return false;
}
}
void MutatableImageComputer::abort()
{
communications().abort(true);
}
void MutatableImageComputer::abort_for(const MutatableImageDisplay* disp)
{
if (task()!=0 && task()->display()==disp)
{
communications().abort(true);
}
}
void MutatableImageComputer::kill()
{
communications().kill(true);
}
bool MutatableImageComputer::killed() const
{
return communications().kill();
}
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