118 lines
5.3 KiB
C++
118 lines
5.3 KiB
C++
/**************************************************************************************/
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/* */
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/* Visualization Library */
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/* http://visualizationlibrary.org */
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/* */
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/* Copyright (c) 2005-2020, Michele Bosi */
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/* All rights reserved. */
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/* */
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/* Redistribution and use in source and binary forms, with or without modification, */
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/* are permitted provided that the following conditions are met: */
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/* */
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/* - Redistributions of source code must retain the above copyright notice, this */
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/* list of conditions and the following disclaimer. */
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/* */
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/* - Redistributions in binary form must reproduce the above copyright notice, this */
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/* list of conditions and the following disclaimer in the documentation and/or */
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/* other materials provided with the distribution. */
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/* */
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/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND */
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/* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED */
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/* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */
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/* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR */
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/* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES */
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/* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; */
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/* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON */
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/* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
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/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS */
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/* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
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/* */
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/**************************************************************************************/
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#ifndef RenderState_INCLUDE_ONCE
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#define RenderState_INCLUDE_ONCE
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#include <vlCore/Object.hpp>
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#include <vlCore/vlnamespace.hpp>
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namespace vl
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{
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class Camera;
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class OpenGLContext;
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//------------------------------------------------------------------------------
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// RenderState
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//------------------------------------------------------------------------------
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/**
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* Base class for most of the OpenGL render state wrapper classes.
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*
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* \sa Shader, Effect, Actor
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*/
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class VLGRAPHICS_EXPORT RenderState: public Object
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{
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VL_INSTRUMENT_ABSTRACT_CLASS(vl::RenderState, Object)
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public:
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RenderState()
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{
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VL_DEBUG_SET_OBJECT_NAME()
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}
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virtual ERenderState type() const { return RS_NONE; }
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/** The parameter cameara is NULL if we are disabling the state, non-NULL if we are enabling it. */
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virtual void apply(int index, const Camera* camera, OpenGLContext* ctx) const = 0;
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virtual ref<RenderState> clone() const = 0;
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};
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//------------------------------------------------------------------------------
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// RenderStateIndexed
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//------------------------------------------------------------------------------
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/** Base class for those render states which have more than one binding points like lights, clipping planes and texture unit states. */
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class VLGRAPHICS_EXPORT RenderStateIndexed: public RenderState
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{
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VL_INSTRUMENT_ABSTRACT_CLASS(vl::RenderStateIndexed, RenderState)
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public:
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RenderStateIndexed()
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{
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VL_DEBUG_SET_OBJECT_NAME()
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}
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};
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//------------------------------------------------------------------------------
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// RenderStateNonIndexed
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//------------------------------------------------------------------------------
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/** Base class for those render states which have only one binding point (the vast majority). */
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class VLGRAPHICS_EXPORT RenderStateNonIndexed: public RenderState
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{
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VL_INSTRUMENT_ABSTRACT_CLASS(vl::RenderStateNonIndexed, RenderState)
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public:
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RenderStateNonIndexed()
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{
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VL_DEBUG_SET_OBJECT_NAME()
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}
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};
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//------------------------------------------------------------------------------
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struct RenderStateSlot
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{
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RenderStateSlot(): mRS(NULL), mIndex(-1) {}
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RenderStateSlot(RenderState* rs, int index): mRS(rs), mIndex(index) {}
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virtual ~RenderStateSlot() {}
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virtual void apply(const Camera* camera, OpenGLContext* ctx) const { mRS->apply( mIndex, camera, ctx ); }
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ERenderState type() const
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{
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if (mIndex > 0)
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return (ERenderState)(mRS->type() + mIndex);
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else
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return mRS->type();
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}
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ref<RenderState> mRS;
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int mIndex;
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};
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//------------------------------------------------------------------------------
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}
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#endif
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