/usr/include/crystalspace-2.0/csgfx/shadervarcontext.h is in libcrystalspace-dev 2.0+dfsg-1build1.
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Copyright (C) 2003 by Jorrit Tyberghein
(C) 2003 by Frank Richter
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __CS_CSGFX_SHADERVARCONTEXT_H__
#define __CS_CSGFX_SHADERVARCONTEXT_H__
#include "csextern.h"
#include "csutil/scf_implementation.h"
#include "ivideo/shader/shader.h"
#include "shadervar.h"
/**\file
* Simple implementation for iShaderVariableContext.
*/
namespace CS
{
namespace Graphics
{
/**
* Simple implementation for iShaderVariableContext.
* Can be inherited from for use in SCF classes. For an example,
* see csShaderVariableContext.
*/
class CS_CRYSTALSPACE_EXPORT ShaderVariableContextImpl :
public virtual iShaderVariableContext
{
protected:
csRefArray<csShaderVariable> variables;
public:
virtual ~ShaderVariableContextImpl();
const csRefArray<csShaderVariable>& GetShaderVariables () const
{ return variables; }
virtual void AddVariable (csShaderVariable *variable);
virtual csShaderVariable* GetVariable (ShaderVarStringID name) const;
virtual void PushVariables (csShaderVariableStack& stacks) const;
virtual bool IsEmpty() const { return variables.GetSize () == 0; }
virtual void ReplaceVariable (csShaderVariable *variable);
virtual void Clear () { variables.Empty(); }
virtual bool RemoveVariable (csShaderVariable* variable);
virtual bool RemoveVariable (ShaderVarStringID name);
};
/**
* iShaderVariableContext implementation that overlays (or merges) it's
* variables over the variables of a given parent context.
*/
class OverlayShaderVariableContextImpl : public ShaderVariableContextImpl
{
csRef<iShaderVariableContext> parentSVC;
public:
OverlayShaderVariableContextImpl (iShaderVariableContext* parent = 0) :
parentSVC (parent) {}
iShaderVariableContext* GetParentContext() const { return parentSVC; }
void SetParentContext (iShaderVariableContext* parent)
{ parentSVC = parent; }
void AddVariable (csShaderVariable *variable)
{ ShaderVariableContextImpl::AddVariable (variable); }
csShaderVariable* GetVariable (ShaderVarStringID name) const
{
csShaderVariable* sv = ShaderVariableContextImpl::GetVariable (name);
if ((sv == 0) && (parentSVC.IsValid()))
sv = parentSVC->GetVariable (name);
return sv;
}
const csRefArray<csShaderVariable>& GetShaderVariables () const
{
// @@@ Will not return parent SVs
return ShaderVariableContextImpl::GetShaderVariables ();
}
void PushVariables (csShaderVariableStack& stacks) const
{
if (parentSVC.IsValid()) parentSVC->PushVariables (stacks);
ShaderVariableContextImpl::PushVariables (stacks);
}
bool IsEmpty () const
{
return ShaderVariableContextImpl::IsEmpty()
&& (!parentSVC.IsValid() || parentSVC->IsEmpty());
}
void ReplaceVariable (csShaderVariable *variable)
{ ShaderVariableContextImpl::ReplaceVariable (variable); }
void Clear () { ShaderVariableContextImpl::Clear(); }
bool RemoveVariable (csShaderVariable* variable)
{
// @@@ Also remove from parent?
return ShaderVariableContextImpl::RemoveVariable (variable);
}
bool RemoveVariable (ShaderVarStringID name)
{
// @@@ Also remove from parent?
return ShaderVariableContextImpl::RemoveVariable (name);
}
};
} // namespace Graphics
// Deprecated in 1.3
typedef CS_DEPRECATED_TYPE_MSG("Use Graphics::ShaderVariableContextImpl")
Graphics::ShaderVariableContextImpl ShaderVariableContextImpl;
}
/**
* Complete SCF class implementing iShaderVariableContext.
*/
class CS_CRYSTALSPACE_EXPORT csShaderVariableContext :
public scfImplementation1<csShaderVariableContext,
scfFakeInterface<iShaderVariableContext> >,
public CS::Graphics::ShaderVariableContextImpl
{
public:
CS_LEAKGUARD_DECLARE (csShaderVariableContext);
csShaderVariableContext ();
csShaderVariableContext (const csShaderVariableContext& other);
virtual ~csShaderVariableContext ();
};
#endif // __CS_CSGFX_SHADERVARCONTEXT_H__
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