72 lines
1.7 KiB
C++
72 lines
1.7 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 glSamplerContext_src.cxx
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* @author rdb
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* @date 2014-12-11
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*/
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#include "pnotify.h"
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#ifndef OPENGLES_1
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TypeHandle CLP(SamplerContext)::_type_handle;
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/**
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*
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*/
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INLINE CLP(SamplerContext)::
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CLP(SamplerContext)(CLP(GraphicsStateGuardian) *glgsg,
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const SamplerState &sampler) :
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SamplerContext(sampler)
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{
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_glgsg = glgsg;
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_glgsg->_glGenSamplers(1, &_index);
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}
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/**
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*
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*/
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CLP(SamplerContext)::
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~CLP(SamplerContext)() {
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// Don't call glDeleteSamplers; we may not have an active context.
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}
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/**
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* Evicts the page from the LRU. Called internally when the LRU determines
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* that it is full. May also be called externally when necessary to
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* explicitly evict the page.
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*
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* It is legal for this method to either evict the page as requested, do
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* nothing (in which case the eviction will be requested again at the next
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* epoch), or requeue itself on the tail of the queue (in which case the
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* eviction will be requested again much later).
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*/
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void CLP(SamplerContext)::
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evict_lru() {
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dequeue_lru();
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reset_data();
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}
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/**
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* Resets the texture object to a new one so a new GL texture object can be
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* uploaded.
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*/
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void CLP(SamplerContext)::
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reset_data() {
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// Free the sampler resource.
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_glgsg->_glDeleteSamplers(1, &_index);
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_index = 0;
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// We still need a valid index number, though, in case we want to re-load
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// the sampler later. glGenSamplers(1, &_index);
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}
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#endif // OPENGLES_1
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