mirror of https://github.com/BOINC/boinc.git
103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
// This file is part of BOINC.
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// http://boinc.berkeley.edu
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// Copyright (C) 2008 University of California
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//
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// BOINC is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License
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// as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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//
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// BOINC is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
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// platform-independent part of graphics library
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//
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#include "util.h"
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#include "app_ipc.h"
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#include "shmem.h"
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#include "boinc_api.h"
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#include "graphics2.h"
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double boinc_max_fps = 30.;
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double boinc_max_gfx_cpu_frac = 0.2;
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// needs to be fairly low. Graphics apps run at normal priority,
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// so they can prevent main app from getting any time
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bool throttled_app_render(int x, int y, double t) {
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static double total_render_time = 0;
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static double time_until_render = 0;
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static double last_now = 0;
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static double elapsed_time = 0;
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double now, t0, t1, diff, frac;
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bool ok_to_render = true;
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now = dtime();
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diff = now - last_now;
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last_now = now;
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// ignore interval if negative or more than 1 second
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//
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if ((diff<0) || (diff>1.0)) {
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diff = 0;
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}
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// enforce frames/sec restriction
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//
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if (boinc_max_fps) {
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time_until_render -= diff;
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if (time_until_render < 0) {
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time_until_render += 1./boinc_max_fps;
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} else {
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ok_to_render = false;
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}
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}
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// enforce max CPU time restriction
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//
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if (boinc_max_gfx_cpu_frac) {
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elapsed_time += diff;
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if (elapsed_time) {
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frac = total_render_time/elapsed_time;
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if (frac > boinc_max_gfx_cpu_frac) {
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ok_to_render = false;
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}
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}
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}
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// render if allowed
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//
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if (ok_to_render) {
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if (boinc_max_gfx_cpu_frac) {
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boinc_calling_thread_cpu_time(t0);
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}
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app_graphics_render(x, y, t);
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if (boinc_max_gfx_cpu_frac) {
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boinc_calling_thread_cpu_time(t1);
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total_render_time += t1 - t0;
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}
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return true;
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}
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return false;
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}
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void get_window_title(char* buf, int len) {
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APP_INIT_DATA aid;
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boinc_get_init_data(aid);
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if (aid.app_version) {
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snprintf(buf, len,
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"%s version %.2f [workunit: %s]",
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aid.app_name, aid.app_version/100.0, aid.wu_name
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);
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} else {
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snprintf(buf, len,
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"%s [workunit: %s]",
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aid.app_name, aid.wu_name
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);
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}
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}
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