68 lines
1.9 KiB
C++
68 lines
1.9 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 samplerContext.h
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* @author rdb
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* @date 2014-12-11
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*/
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#ifndef SAMPLERCONTEXT_H
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#define SAMPLERCONTEXT_H
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#include "pandabase.h"
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#include "adaptiveLru.h"
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#include "simpleLru.h"
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#include "samplerState.h"
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#include "savedContext.h"
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/**
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* This is a special class object that holds a handle to the sampler state
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* object given by the graphics back-end for a particular combination of
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* texture sampling settings.
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*
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* Some graphics back-ends (like OpenGL) use mutable sampler objects, whereas
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* others (Direct3D 10+) use immutable ones. In Panda3D, each unique sampler
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* state has its own SamplerContext, which simplifies the implementation and
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* makes redundant sampler objects impossible.
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*/
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class EXPCL_PANDA_GOBJ SamplerContext : public SavedContext, public SimpleLruPage {
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public:
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INLINE SamplerContext(const SamplerState &sampler);
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virtual void output(std::ostream &out) const;
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virtual void write(std::ostream &out, int indent_level) const;
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public:
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static TypeHandle get_class_type() {
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return _type_handle;
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}
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static void init_type() {
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SavedContext::init_type();
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register_type(_type_handle, "SamplerContext",
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SavedContext::get_class_type());
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}
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virtual TypeHandle get_type() const {
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return get_class_type();
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}
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virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
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private:
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static TypeHandle _type_handle;
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friend class PreparedGraphicsObjects;
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};
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inline std::ostream &operator << (std::ostream &out, const SamplerContext &context) {
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context.output(out);
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return out;
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}
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#include "samplerContext.I"
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#endif
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