97 lines
2.7 KiB
C++
97 lines
2.7 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file glTimerQueryContext_src.cxx
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* @author rdb
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* @date 2014-08-22
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*/
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#include "pnotify.h"
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#include "dcast.h"
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#include "lightMutexHolder.h"
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#include "pStatTimer.h"
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#ifndef OPENGLES // Timer queries not supported by OpenGL ES.
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TypeHandle CLP(TimerQueryContext)::_type_handle;
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/**
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*
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*/
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CLP(TimerQueryContext)::
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~CLP(TimerQueryContext)() {
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if (_index != 0) {
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// Tell the GSG to recycle this index when it gets around to it. If it
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// has already shut down, though, too bad. This means we never get to
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// free this index, but presumably the app is already shutting down
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// anyway.
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if (auto glgsg = _glgsg.lock()) {
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LightMutexHolder holder(glgsg->_lock);
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glgsg->_deleted_queries.push_back(_index);
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_index = 0;
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}
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}
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}
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/**
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* Returns true if the query's answer is ready, false otherwise. If this
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* returns false, the application must continue to poll until it returns true.
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*
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* It is only valid to call this from the draw thread.
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*/
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bool CLP(TimerQueryContext)::
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is_answer_ready() const {
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GLuint result;
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_glgsg->_glGetQueryObjectuiv(_index, GL_QUERY_RESULT_AVAILABLE, &result);
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return (result != 0);
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}
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/**
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* Requests the graphics engine to expedite the pending answer--the
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* application is now waiting until the answer is ready.
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*
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* It is only valid to call this from the draw thread.
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*/
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void CLP(TimerQueryContext)::
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waiting_for_answer() {
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PStatTimer timer(GraphicsStateGuardian::_wait_timer_pcollector);
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glFlush();
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}
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/**
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* Returns the timestamp that is the result of this timer query. There's no
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* guarantee about which clock this uses, the only guarantee is that
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* subtracting a start time from an end time should yield a time in seconds.
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* If is_answer_ready() did not return true, this function may block before it
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* returns.
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*
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* It is only valid to call this from the draw thread.
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*/
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double CLP(TimerQueryContext)::
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get_timestamp() const {
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GLuint64 time_ns;
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/*GLuint available;
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_glgsg->_glGetQueryObjectuiv(_index[1], GL_QUERY_RESULT_AVAILABLE, &available);
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if (available) {
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// The answer is ready now.
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do_get_timestamps(begin_ns, end_ns);
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} else {
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// The answer is not ready; this call will block.
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PStatTimer timer(GraphicsStateGuardian::_wait_timer_pcollector);
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do_get_timestamps(begin_ns, end_ns);
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}*/
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_glgsg->_glGetQueryObjectui64v(_index, GL_QUERY_RESULT, &time_ns);
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return time_ns * 0.000000001;
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}
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#endif // OPENGLES
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