93 lines
3.4 KiB
C++
93 lines
3.4 KiB
C++
// Filename: glOcclusionQueryContext_src.cxx
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// Created by: drose (27Mar06)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
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//
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// All use of this software is subject to the terms of the Panda 3d
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// Software license. You should have received a copy of this license
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// along with this source code; you will also find a current copy of
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// the license at http://etc.cmu.edu/panda3d/docs/license/ .
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//
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// To contact the maintainers of this program write to
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// panda3d-general@lists.sourceforge.net .
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//
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////////////////////////////////////////////////////////////////////
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#include "pnotify.h"
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#include "dcast.h"
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#include "mutexHolder.h"
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TypeHandle CLP(OcclusionQueryContext)::_type_handle;
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////////////////////////////////////////////////////////////////////
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// Function: GLOcclusionQueryContext::Destructor
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// Access: Public, Virtual
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// Description:
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////////////////////////////////////////////////////////////////////
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CLP(OcclusionQueryContext)::
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~CLP(OcclusionQueryContext)() {
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if (_index != 0) {
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// Tell the GSG to recycle this index when it gets around to it.
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CLP(GraphicsStateGuardian) *glgsg;
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DCAST_INTO_V(glgsg, _gsg);
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MutexHolder 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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// Function: GLOcclusionQueryContext::is_answer_ready
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// Access: Public, Virtual
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// Description: Returns true if the query's answer is ready, false
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// otherwise. If this returns false, the application
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// 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(OcclusionQueryContext)::
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is_answer_ready() const {
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CLP(GraphicsStateGuardian) *glgsg;
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DCAST_INTO_R(glgsg, _gsg, false);
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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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// Function: GLOcclusionQueryContext::waiting_for_answer
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// Access: Public, Virtual
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// Description: Requests the graphics engine to expedite the pending
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// answer--the application is now waiting until the
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// 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(OcclusionQueryContext)::
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waiting_for_answer() {
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GLP(Flush)();
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}
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////////////////////////////////////////////////////////////////////
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// Function: GLOcclusionQueryContext::get_num_fragments
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// Access: Public, Virtual
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// Description: Returns the number of fragments (pixels) of the
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// specified geometry that passed the depth test.
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// If is_answer_ready() did not return true, this
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// function may block before it 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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int CLP(OcclusionQueryContext)::
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get_num_fragments() const {
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CLP(GraphicsStateGuardian) *glgsg;
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DCAST_INTO_R(glgsg, _gsg, 0);
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GLuint result;
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glgsg->_glGetQueryObjectuiv(_index, GL_QUERY_RESULT, &result);
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return result;
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}
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