pover_video.cpp

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/*
    Copyright 2005-2010 Intel Corporation.  All Rights Reserved.

    This file is part of Threading Building Blocks.

    Threading Building Blocks is free software; you can redistribute it
    and/or modify it under the terms of the GNU General Public License
    version 2 as published by the Free Software Foundation.

    Threading Building Blocks 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 Threading Building Blocks; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    As a special exception, you may use this file as part of a free software
    library without restriction.  Specifically, if other files instantiate
    templates or use macros or inline functions from this file, or you compile
    this file and link it with other files to produce an executable, this
    file does not by itself cause the resulting executable to be covered by
    the GNU General Public License.  This exception does not however
    invalidate any other reasons why the executable file might be covered by
    the GNU General Public License.
*/

// Support for GUI display for Polygon overlay demo

#define VIDEO_WINMAIN_ARGS
#include <iostream>
#include "polyover.h"
#include "polymain.h"
#include "pover_video.h"
#include "tbb/tick_count.h"
#include "tbb/task_scheduler_init.h"
#ifndef _WIN32
#include <sys/time.h>
#include <unistd.h>

void rt_sleep(int msec) {
    usleep(msec*1000);
}

#else //_WIN32

#undef OLDUNIXTIME
#undef STDTIME

#include <windows.h>

void rt_sleep(int msec) {
    Sleep(msec);
}

#endif  /*  _WIN32  */

using namespace std;

bool g_next_frame() {
    if(++n_next_frame_calls >= frame_skips) { // the data race here is benign
        n_next_frame_calls = 0; 
        return gVideo->next_frame();
    } 
    return gVideo->running;
}

bool g_last_frame() {
    if(n_next_frame_calls) return gVideo->next_frame(); 
    return gVideo->running;
}

bool initializeVideo(int argc, char **argv) {
    //pover_video *l_video = new pover_video();
    //gVideo = l_video;
    gVideo->init_console();  // don't check return code.
    gVideo->title = g_windowTitle;
    g_useGraphics = gVideo->init_window(g_xwinsize, g_ywinsize);
    return true;
}

void pover_video::on_process() {
    tbb::tick_count t0, t1;
    double naiveParallelTime, domainSplitParallelTime;
    // create map1  These could be done in parallel, if the pseudorandom number generator were re-seeded.
    GenerateMap(&gPolymap1, gMapXSize, gMapYSize, gNPolygons, /*red*/255, /*green*/0, /*blue*/127);
    // create map2
    GenerateMap(&gPolymap2, gMapXSize, gMapYSize, gNPolygons, /*red*/0, /*green*/255, /*blue*/127);
        //
        // Draw source maps
    gDrawXOffset = map1XLoc;
    gDrawYOffset = map1YLoc;
        for(int i=0; i < int(gPolymap1->size()); i++) {
            gPolymap1->at(i)->drawPoly();
        }
    gDrawXOffset = map2XLoc;
    gDrawYOffset = map2YLoc;
        for(int i=0; i < int(gPolymap2->size()) ;i++) {
            gPolymap2->at(i)->drawPoly();
        }
        gDoDraw = true;

    // run serial map generation
    gDrawXOffset = maprXLoc;
    gDrawYOffset = maprYLoc;
    {
        RPolygon *xp = RPolygon::alloc_RPolygon(0, 0, gMapXSize-1, gMapYSize-1, 0, 0, 0);  // Clear the output space
        RPolygon::free_RPolygon( xp );
        t0 = tbb::tick_count::now();
        SerialOverlayMaps(&gResultMap, gPolymap1, gPolymap2);
        t1 = tbb::tick_count::now();
        cout << "Serial overlay took " << (t1-t0).seconds()*1000 << " msec" << std::endl;
        gSerialTime = (t1-t0).seconds()*1000;
#if _DEBUG
        CheckPolygonMap(gResultMap);
        // keep the map for comparison purposes.
#else
        for(int i=0; i<int(gResultMap->size());i++) {
            RPolygon::free_RPolygon(gResultMap->at(i));
        }
        delete gResultMap;
#endif
        if(gCsvFile.is_open()) {
            gCsvFile << "Serial Time," << gSerialTime << std::endl;
            gCsvFile << "Threads,";
            if(gThreadsLow == THREADS_UNSET || gThreadsLow == tbb::task_scheduler_init::automatic) {
                gCsvFile << "Threads,Automatic";
            }
            else {
                for(int i=gThreadsLow; i <= gThreadsHigh; i++) {
                    gCsvFile << i;
                    if(i < gThreadsHigh) gCsvFile << ",";
                }
            }
            gCsvFile << std::endl;
        }
        if(gIsGraphicalVersion) rt_sleep(2000);
    }
    // run naive parallel map generation
    {
        Polygon_map_t *resultMap;
        if(gCsvFile.is_open()) {
            gCsvFile << "Naive Time";
        }
        NaiveParallelOverlay(resultMap, *gPolymap1, *gPolymap2);
        delete resultMap;
        if(gIsGraphicalVersion) rt_sleep(2000);
    }
    // run split map generation
    {
        Polygon_map_t *resultMap;
        if(gCsvFile.is_open()) {
            gCsvFile << "Split Time";
        }
        SplitParallelOverlay(&resultMap, gPolymap1, gPolymap2);
        delete resultMap;
        if(gIsGraphicalVersion) rt_sleep(10000);
    }
}