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// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2017 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
// platform-independent part of graphics library
//
#ifdef _WIN32
#include <boinc_win.h>
#endif
#include "util.h"
#include "app_ipc.h"
#include "shmem.h"
#include "boinc_api.h"
#include "graphics2.h"
#ifdef __APPLE__
#include "x_opengl.h"
#endif
double boinc_max_fps = 30.;
double boinc_max_gfx_cpu_frac = 0.2;
// needs to be fairly low. Graphics apps run at normal priority,
// so they can prevent main app from getting any time
bool throttled_app_render(int x, int y, double t) {
static double total_render_time = 0;
static double time_until_render = 0;
static double last_now = 0;
static double elapsed_time = 0;
double now, t0=0, t1, diff, frac;
bool ok_to_render = true;
now = dtime();
diff = now - last_now;
last_now = now;
// ignore interval if negative or more than 1 second
//
if ((diff<0) || (diff>1.0)) {
diff = 0;
}
// enforce frames/sec restriction
//
if (boinc_max_fps) {
time_until_render -= diff;
if (time_until_render < 0) {
time_until_render += 1./boinc_max_fps;
} else {
ok_to_render = false;
}
}
// enforce max CPU time restriction
//
if (boinc_max_gfx_cpu_frac) {
elapsed_time += diff;
if (elapsed_time) {
frac = total_render_time/elapsed_time;
if (frac > boinc_max_gfx_cpu_frac) {
ok_to_render = false;
}
}
}
// render if allowed
//
if (ok_to_render) {
if (boinc_max_gfx_cpu_frac) {
boinc_calling_thread_cpu_time(t0);
}
app_graphics_render(x, y, t);
#ifdef __APPLE__
if (UseSharedOffscreenBuffer()) {
MacPassOffscreenBufferToScreenSaver();
//app_graphics_render(x, y, t); // For testing only
}
#endif
if (boinc_max_gfx_cpu_frac) {
boinc_calling_thread_cpu_time(t1);
total_render_time += t1 - t0;
}
return true;
}
return false;
}
void get_window_title(char* buf, int len) {
APP_INIT_DATA aid;
boinc_get_init_data(aid);
if (aid.app_version) {
snprintf(buf, len,
"%s version %.2f [workunit: %s]",
aid.app_name, aid.app_version/100.0, aid.wu_name
);
} else {
snprintf(buf, len,
"%s [workunit: %s]",
aid.app_name, aid.wu_name
);
}
}
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