static void parallel_thread(void)
{
unsigned int mboxsize = sizeof(unsigned int)*(max_objectid() + 20);
#if RUNTIME == RUNTIME_SERIAL
for ( int y = starty; y < stopy; y++ )
#elif RUNTIME == RUNTIME_OPENMP
#pragma omp parallel for
for ( int y = starty; y < stopy; y++ )
#elif RUNTIME == RUNTIME_CILK
_Cilk_for(int y = starty; y < stopy; y++)
#elif RUNTIME == RUNTIME_TBB
tbb::parallel_for(starty, stopy, [mboxsize] (int y)
#endif
{
unsigned int serial = 1;
unsigned int local_mbox[mboxsize];
memset(local_mbox, 0, mboxsize);
drawing_area drawing(startx, totaly - y, stopx - startx, 1);
for ( int x = startx; x < stopx; x++ ) {
color_t c = render_one_pixel(x, y, local_mbox, serial, startx, stopx, starty, stopy);
drawing.put_pixel(c);
}
video->next_frame();
}
#if RUNTIME == RUNTIME_TBB
);
#endif
}
//todo: comment out following routine in TBB implementation
///*
static void draw_task (void)
{
// thread-local storage
unsigned int serial = 1;
unsigned int mboxsize = sizeof(unsigned int)*(max_objectid() + 20);
unsigned int * local_mbox = (unsigned int *) alloca(mboxsize);
memset(local_mbox,0,mboxsize);
for (int y = starty; y < stopy; y++) { {
drawing_area drawing(startx, totaly-y, stopx-startx, 1);
for (int x = startx; x < stopx; x++) {
color_t c = render_one_pixel (x, y, local_mbox, serial, startx, stopx, starty, stopy);
drawing.put_pixel(c);
} }
if(!video->next_frame()) return;
}
}
void operator() (const tbb::blocked_range<int> &r) const
{
// task-local storage
unsigned int serial = 1;
unsigned int mboxsize = sizeof(unsigned int)*(max_objectid() + 20);
unsigned int * local_mbox = (unsigned int *) alloca(mboxsize);
memset(local_mbox,0,mboxsize);
for (int y = r.begin(); y != r.end(); ++y) { {
drawing_area drawing(startx, totaly-y, stopx-startx, 1);
for (int x = startx; x < stopx; x++) {
color_t c = render_one_pixel (x, y, local_mbox, serial, startx, stopx, starty, stopy);
drawing.put_pixel(c);
} }
if(!video->next_frame()) return;
}
}
void operator() (const tbb::blocked_range2d<int> &r) const
{
// task-local storage
unsigned int serial = 1;
unsigned int mboxsize = sizeof(unsigned int)*(max_objectid() + 20);
unsigned int * local_mbox = (unsigned int *) alloca(mboxsize);
memset(local_mbox,0,mboxsize);
#ifdef MARK_RENDERING_AREA
// compute thread number while first task run
thread_id_t::reference thread_id = thread_ids.local();
if (thread_id == -1) thread_id = thread_number++;
// choose thread color
int pos = thread_id % NUM_COLORS;
if(video->running) {
drawing_area drawing(r.cols().begin(), totaly-r.rows().end(), r.cols().end() - r.cols().begin(), r.rows().end()-r.rows().begin());
for (int i = 1, y = r.rows().begin(); y != r.rows().end(); ++y, i++) {
drawing.set_pos(0, drawing.size_y-i);
for (int x = r.cols().begin(); x != r.cols().end(); x++) {
int d = (y % 3 == 0) ? 2 : 1;
drawing.put_pixel(video->get_color(colors[pos][0]/d, colors[pos][1]/d, colors[pos][2]/d));
}
}
}
#endif
if(video->next_frame()) {
drawing_area drawing(r.cols().begin(), totaly-r.rows().end(), r.cols().end() - r.cols().begin(), r.rows().end()-r.rows().begin());
for (int i = 1, y = r.rows().begin(); y != r.rows().end(); ++y, i++) {
drawing.set_pos(0, drawing.size_y-i);
for (int x = r.cols().begin(); x != r.cols().end(); x++) {
#ifdef MARK_RENDERING_AREA
float alpha = y==r.rows().begin()||y==r.rows().end()-1||x==r.cols().begin()||x==r.cols().end()-1
? border_alpha : inner_alpha;
color_t c = render_one_pixel (x, y, local_mbox, serial, startx, stopx, starty, stopy, colors[pos], alpha);
#else
color_t c = render_one_pixel (x, y, local_mbox, serial, startx, stopx, starty, stopy);
#endif
drawing.put_pixel(c);
}
}
}
}
void operator () (const tbb::blocked_range <int> &r) const {
unsigned int serial = 1;
unsigned int mboxsize = sizeof(unsigned int)*(max_objectid() + 20);
unsigned int * local_mbox = (unsigned int *) alloca(mboxsize);
memset(local_mbox,0,mboxsize);
for (int y=r.begin(); y!=r.end(); ++y) {
drawing_area drawing(startx, totaly-y, stopx-startx, 1);
// Acquire mutex to protect pixel calculation from multithreaded access (Needed?)
// pthread_mutex_lock (&rgb_mutex);
for (int x = startx; x < stopx; x++) {
color_t c = render_one_pixel (x, y, local_mbox, serial, startx, stopx, starty, stopy);
drawing.put_pixel(c);
}
// Release the mutex after pixel calculation complete
// pthread_mutex_unlock (&rgb_mutex);
if(!video->next_frame()) tbb::task::self().cancel_group_execution();
}
}
