63 lines
2.0 KiB
C++
Executable File
63 lines
2.0 KiB
C++
Executable File
// =====================================================================================================================
|
|
// glw, an open-source library that wraps OpenGL structures into classes.
|
|
// Copyright (C) 2024 Medusa Slockbower
|
|
//
|
|
// This program 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.
|
|
//
|
|
// This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
|
|
// =====================================================================================================================
|
|
|
|
#ifndef GLW_TIMER_H
|
|
#define GLW_TIMER_H
|
|
|
|
#include <cassert>
|
|
#include "common.h"
|
|
|
|
namespace glw
|
|
{
|
|
|
|
class timer
|
|
{
|
|
private:
|
|
enum
|
|
{
|
|
begin = 0
|
|
, end = 1
|
|
};
|
|
|
|
public:
|
|
timer() : handles_{ 0 }, running_(false) { glCreateQueries(GL_TIMESTAMP, 2, handles_); }
|
|
timer(const timer&) = delete;
|
|
timer(timer&&) = default;
|
|
~timer() { glDeleteQueries(2, handles_); }
|
|
|
|
void start() { assert(not running_); glQueryCounter(handles_[begin], GL_TIMESTAMP); running_ = true; }
|
|
void stop() { assert(running_); glQueryCounter(handles_[end], GL_TIMESTAMP); running_ = false; }
|
|
int64_t poll()
|
|
{
|
|
assert(not running_);
|
|
int32_t available = false;
|
|
while(not available) glGetQueryObjectiv(handles_[end], GL_QUERY_RESULT_AVAILABLE, &available);
|
|
int64_t start; glGetQueryObjecti64v(handles_[begin], GL_QUERY_RESULT, &start);
|
|
int64_t stop; glGetQueryObjecti64v(handles_[end], GL_QUERY_RESULT, &stop);
|
|
return stop - start;
|
|
}
|
|
|
|
private:
|
|
handle_t handles_[2];
|
|
bool running_;
|
|
};
|
|
|
|
}
|
|
|
|
#endif //TIMER_H
|