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134 lines
4.2 KiB
C++
134 lines
4.2 KiB
C++
// Created on: 2014-10-08
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// Created by: Denis BOGOLEPOV
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// Copyright (c) 2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <OpenGl_Sampler.hxx>
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#include <OpenGl_GlCore33.hxx>
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#include <Standard_Assert.hxx>
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IMPLEMENT_STANDARD_HANDLE (OpenGl_Sampler, OpenGl_Resource)
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IMPLEMENT_STANDARD_RTTIEXT(OpenGl_Sampler, OpenGl_Resource)
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// =======================================================================
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// function : OpenGl_Sampler
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// purpose :
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// =======================================================================
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OpenGl_Sampler::OpenGl_Sampler()
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: mySamplerID (NO_SAMPLER)
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{
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//
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}
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// =======================================================================
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// function : ~OpenGl_Sampler
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// purpose :
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// =======================================================================
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OpenGl_Sampler::~OpenGl_Sampler()
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{
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Release (NULL);
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}
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// =======================================================================
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// function : Release
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// purpose :
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// =======================================================================
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void OpenGl_Sampler::Release (OpenGl_Context* theContext)
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{
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if (isValidSampler())
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{
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// application can not handle this case by exception - this is bug in code
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Standard_ASSERT_RETURN (theContext != NULL,
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"OpenGl_Sampler destroyed without GL context! Possible GPU memory leakage...",);
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if (theContext->IsValid())
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{
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#if !defined(GL_ES_VERSION_2_0) || defined(GL_ES_VERSION_3_0)
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theContext->core33->glDeleteSamplers (1, &mySamplerID);
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#endif
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}
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mySamplerID = NO_SAMPLER;
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}
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}
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// =======================================================================
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// function : Init
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// purpose : Initializes sampler object
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// =======================================================================
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Standard_Boolean OpenGl_Sampler::Init (OpenGl_Context& theContext)
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{
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if (theContext.core33 == NULL)
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{
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return Standard_False;
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}
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if (isValidSampler())
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{
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Release (&theContext);
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}
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#if !defined(GL_ES_VERSION_2_0) || defined(GL_ES_VERSION_3_0)
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theContext.core33->glGenSamplers (1, &mySamplerID);
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return Standard_True;
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#else
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return Standard_False;
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#endif
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}
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// =======================================================================
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// function : Bind
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// purpose : Binds sampler object to the given texture unit
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// =======================================================================
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void OpenGl_Sampler::Bind (OpenGl_Context& theContext,
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const GLuint theUnit)
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{
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if (isValidSampler())
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{
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#if !defined(GL_ES_VERSION_2_0) || defined(GL_ES_VERSION_3_0)
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theContext.core33->glBindSampler (theUnit, mySamplerID);
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#endif
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}
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}
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// =======================================================================
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// function : Unbind
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// purpose : Unbinds sampler object from the given texture unit
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// =======================================================================
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void OpenGl_Sampler::Unbind (OpenGl_Context& theContext,
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const GLuint theUnit)
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{
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if (isValidSampler())
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{
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#if !defined(GL_ES_VERSION_2_0) || defined(GL_ES_VERSION_3_0)
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theContext.core33->glBindSampler (theUnit, NO_SAMPLER);
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#endif
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}
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}
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// =======================================================================
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// function : SetParameter
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// purpose : Sets sampler parameters
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// =======================================================================
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void OpenGl_Sampler::SetParameter (OpenGl_Context& theContext,
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const GLenum theParam,
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const GLint theValue)
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{
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if (isValidSampler())
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{
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#if !defined(GL_ES_VERSION_2_0) || defined(GL_ES_VERSION_3_0)
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theContext.core33->glSamplerParameteri (mySamplerID, theParam, theValue);
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#endif
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}
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}
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