mirror of
https://github.com/nillerusr/source-engine.git
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364 lines
8.9 KiB
C++
364 lines
8.9 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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// TOGL CODE LICENSE
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//
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// Copyright 2011-2014 Valve Corporation
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// All Rights Reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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// cglmquery.cpp
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//
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//===============================================================================
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#include "togl/rendermechanism.h"
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#ifndef _WIN32
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#include <unistd.h>
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#endif
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// memdbgon -must- be the last include file in a .cpp file.
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#include "tier0/memdbgon.h"
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//===============================================================================
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// http://www.opengl.org/registry/specs/ARB/occlusion_query.txt
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// Workaround for "Calling either GenQueriesARB or DeleteQueriesARB while any query of any target is active causes an INVALID_OPERATION error to be generated."
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uint CGLMQuery::s_nTotalOcclusionQueryCreatesOrDeletes;
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extern ConVar gl_errorcheckall;
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extern ConVar gl_errorcheckqueries;
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extern ConVar gl_errorchecknone;
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// how many microseconds to wait after a failed query-available test
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// presently on MTGL this doesn't happen, but it could change, keep this handy
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ConVar gl_nullqueries( "gl_nullqueries", "0" );
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//===============================================================================
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CGLMQuery::CGLMQuery( GLMContext *ctx, GLMQueryParams *params )
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{
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// get the type of query requested
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// generate name(s) needed
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// set initial state appropriately
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m_ctx = ctx;
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m_params = *params;
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m_name = 0;
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m_syncobj = 0;
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m_started = m_stopped = m_done = false;
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m_nullQuery = false;
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// assume value of convar at start time
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// does not change during individual query lifetime
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// started null = stays null
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// started live = stays live
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switch(m_params.m_type)
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{
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case EOcclusion:
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{
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//make an occlusion query (and a fence to go with it)
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gGL->glGenQueriesARB( 1, &m_name );
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s_nTotalOcclusionQueryCreatesOrDeletes++;
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GLMPRINTF(("-A- CGLMQuery(OQ) created name %d", m_name));
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}
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break;
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case EFence:
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//make a fence - no aux fence needed
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m_syncobj = 0;
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if (gGL->m_bHave_GL_ARB_sync)
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{ /* GL_ARB_sync doesn't separate gen and set, so we do glFenceSync() later. */ }
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else if (gGL->m_bHave_GL_NV_fence)
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gGL->glGenFencesNV(1, &m_name );
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else if (gGL->m_bHave_GL_APPLE_fence)
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gGL->glGenFencesAPPLE(1, &m_name );
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GLMPRINTF(("-A- CGLMQuery(fence) created name %d", m_name));
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break;
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}
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}
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CGLMQuery::~CGLMQuery()
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{
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GLMPRINTF(("-A-> ~CGLMQuery"));
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// make sure query has completed (might not be necessary)
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// delete the name(s)
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switch(m_params.m_type)
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{
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case EOcclusion:
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{
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// do a finish occlusion query ?
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GLMPRINTF(("-A- ~CGLMQuery(OQ) deleting name %d", m_name));
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gGL->glDeleteQueriesARB(1, &m_name );
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s_nTotalOcclusionQueryCreatesOrDeletes++;
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}
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break;
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case EFence:
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{
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// do a finish fence ?
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GLMPRINTF(("-A- ~CGLMQuery(fence) deleting name %llu", gGL->m_bHave_GL_ARB_sync ? (unsigned long long) m_syncobj : (unsigned long long) m_name));
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#ifdef HAVE_GL_ARB_SYNC
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if (gGL->m_bHave_GL_ARB_sync)
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gGL->glDeleteSync( m_syncobj );
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else
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#endif
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if (gGL->m_bHave_GL_NV_fence)
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gGL->glDeleteFencesNV(1, &m_name );
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else if (gGL->m_bHave_GL_APPLE_fence)
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gGL->glDeleteFencesAPPLE(1, &m_name );
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}
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break;
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}
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m_name = 0;
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m_syncobj = 0;
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GLMPRINTF(("-A-< ~CGLMQuery"));
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}
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void CGLMQuery::Start( void ) // "start counting"
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{
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m_nullQuery = (gl_nullqueries.GetInt() != 0); // latch value for remainder of query life
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m_started = true;
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m_stopped = false;
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m_done = false;
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switch(m_params.m_type)
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{
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case EOcclusion:
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{
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if (m_nullQuery)
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{
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// do nothing..
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}
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else
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{
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gGL->glBeginQueryARB( GL_SAMPLES_PASSED_ARB, m_name );
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}
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}
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break;
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case EFence:
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#ifdef HAVE_GL_ARB_SYNC
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if (gGL->m_bHave_GL_ARB_sync)
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{
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if (m_syncobj != 0) gGL->glDeleteSync(m_syncobj);
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m_syncobj = gGL->glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
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}
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else
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#endif
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if (gGL->m_bHave_GL_NV_fence)
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gGL->glSetFenceNV( m_name, GL_ALL_COMPLETED_NV );
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else if (gGL->m_bHave_GL_APPLE_fence)
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gGL->glSetFenceAPPLE( m_name );
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m_stopped = true; // caller should not call Stop on a fence, it self-stops
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break;
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}
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}
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void CGLMQuery::Stop( void ) // "stop counting"
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{
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Assert(m_started);
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if ( m_stopped )
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return;
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switch(m_params.m_type)
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{
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case EOcclusion:
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{
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if (m_nullQuery)
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{
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// do nothing..
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}
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else
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{
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gGL->glEndQueryARB( GL_SAMPLES_PASSED_ARB ); // we are only putting the request-to-stop-counting into the cmd stream.
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}
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}
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break;
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case EFence:
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// nop - you don't "end" a fence, you just test it and/or finish it out in Complete
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break;
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}
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m_stopped = true;
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}
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bool CGLMQuery::IsDone( void )
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{
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Assert(m_started);
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Assert(m_stopped);
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if(!m_done) // you can ask more than once, but we only check until it comes back as done.
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{
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// on occlusion: glGetQueryObjectivARB - large cost on pre SLGU, cheap after
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// on fence: glTestFence* on the fence
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switch(m_params.m_type)
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{
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case EOcclusion: // just test the fence that was set after the query begin
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{
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if (m_nullQuery)
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{
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// do almost nothing.. but claim work is complete
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m_done = true;
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}
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else
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{
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// prepare to pay a big price on drivers prior to 10.6.4+SLGU
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GLint available = 0;
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gGL->glGetQueryObjectivARB(m_name, GL_QUERY_RESULT_AVAILABLE_ARB, &available );
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m_done = (available != 0);
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}
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}
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break;
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case EFence:
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{
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#ifdef HAVE_GL_ARB_SYNC
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if (gGL->m_bHave_GL_ARB_sync)
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m_done = (gGL->glClientWaitSync( m_syncobj, 0, 0 ) == GL_ALREADY_SIGNALED);
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else
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#endif
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if ( m_name == 0 )
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m_done = true;
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else if (gGL->m_bHave_GL_NV_fence)
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m_done = gGL->glTestFenceNV( m_name ) != 0;
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else if (gGL->m_bHave_GL_APPLE_fence)
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m_done = gGL->glTestFenceAPPLE( m_name ) != 0;
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if (m_done)
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{
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if (gGL->m_bHave_GL_ARB_sync)
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{ /* no-op; we already know it's set to GL_ALREADY_SIGNALED. */ }
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else
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{
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if (gGL->m_bHave_GL_NV_fence)
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gGL->glFinishFenceNV( m_name ); // no set fence goes un-finished
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else if (gGL->m_bHave_GL_APPLE_fence)
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gGL->glFinishFenceAPPLE( m_name ); // no set fence goes un-finished
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}
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}
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}
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break;
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}
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}
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return m_done;
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}
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void CGLMQuery::Complete( uint *result )
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{
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uint resultval = 0;
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//bool bogus_available = false;
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// blocking call if not done
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Assert(m_started);
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Assert(m_stopped);
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switch(m_params.m_type)
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{
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case EOcclusion:
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{
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if (m_nullQuery)
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{
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m_done = true;
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resultval = 0; // we did say "null queries..."
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}
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else
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{
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gGL->glGetQueryObjectuivARB( m_name, GL_QUERY_RESULT_ARB, &resultval);
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m_done = true;
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}
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}
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break;
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case EFence:
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{
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if(!m_done)
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{
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#ifdef HAVE_GL_ARB_SYNC
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if (gGL->m_bHave_GL_ARB_sync)
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{
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if (gGL->glClientWaitSync( m_syncobj, 0, 0 ) != GL_ALREADY_SIGNALED)
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{
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GLenum syncstate;
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do {
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const GLuint64 timeout = 10 * ((GLuint64)1000 * 1000 * 1000); // 10 seconds in nanoseconds.
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(void)timeout;
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syncstate = gGL->glClientWaitSync( m_syncobj, GL_SYNC_FLUSH_COMMANDS_BIT, 0 );
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} while (syncstate == GL_TIMEOUT_EXPIRED); // any errors or success break out of this loop.
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}
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}
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else
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#endif
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if (gGL->m_bHave_GL_NV_fence)
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gGL->glFinishFenceNV( m_name );
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else if (gGL->m_bHave_GL_APPLE_fence)
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gGL->glFinishFenceAPPLE( m_name );
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m_done = true; // for clarity or if they try to Complete twice
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}
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}
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break;
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}
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Assert( m_done );
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// reset state for re-use - i.e. you have to call Complete if you want to re-use the object
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m_started = m_stopped = m_done = false;
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if (result) // caller may pass NULL if not interested in result, for example to clear a fence
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{
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*result = resultval;
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}
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}
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// accessors for the started/stopped state
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bool CGLMQuery::IsStarted ( void )
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{
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return m_started;
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}
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bool CGLMQuery::IsStopped ( void )
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{
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return m_stopped;
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}
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