source: nanovis/branches/1.1/PerfQuery.cpp @ 4804

Last change on this file since 4804 was 3502, checked in by ldelgass, 7 years ago

Add basic VTK structured points reader to nanovis, update copyright dates.

  • Property svn:eol-style set to native
File size: 1.1 KB
Line 
1/* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2/*
3 * ----------------------------------------------------------------------
4 * PerfQuery.cpp: performance query class
5 *
6 * ======================================================================
7 *  AUTHOR:  Wei Qiao <qiaow@purdue.edu>
8 *           Purdue Rendering and Perceptualization Lab (PURPL)
9 *
10 *  Copyright (c) 2004-2013  HUBzero Foundation, LLC
11 *
12 *  See the file "license.terms" for information on usage and
13 *  redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
14 * ======================================================================
15 */
16#include <assert.h>
17
18#include "PerfQuery.h"
19
20PerfQuery::PerfQuery()
21{
22    glGenQueriesARB(1, &id);
23    pixel = 0;
24}
25
26PerfQuery::~PerfQuery()
27{
28    glDeleteQueriesARB(1, &id);
29}
30
31//There can only be one active query at any given moment
32void PerfQuery::enable()
33{
34    glBeginQueryARB(GL_SAMPLES_PASSED_ARB, id);
35}
36
37void PerfQuery::disable()
38{
39    glEndQueryARB(GL_SAMPLES_PASSED_ARB);
40
41    GLuint count;
42    glGetQueryObjectuivARB(id, GL_QUERY_RESULT_ARB, &count);
43
44    //accumulate pixel count count
45    pixel += count;
46}
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