12226e4371
and passed as paramters into straight forward non const built in types, i.e. const bool foogbar(const int) becomes bool foobar(int).
85 lines
2.8 KiB
Plaintext
85 lines
2.8 KiB
Plaintext
//C++ header - Open Scene Graph - Copyright (C) 1998-2002 Robert Osfield
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//Distributed under the terms of the GNU Library General Public License (LGPL)
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//as published by the Free Software Foundation.
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#ifndef OSG_BLENDFUNC
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#define OSG_BLENDFUNC 1
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#include <osg/StateAttribute>
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namespace osg {
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/** BlendFunc - encapsulates the OpenGL blend/transparency state.*/
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class SG_EXPORT BlendFunc : public StateAttribute
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{
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public :
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BlendFunc();
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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BlendFunc(const BlendFunc& trans,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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StateAttribute(trans,copyop),
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_source_factor(trans._source_factor),
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_destination_factor(trans._destination_factor) {}
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META_StateAttribute(osg, BlendFunc,BLENDFUNC);
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/** return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs.*/
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virtual int compare(const StateAttribute& sa) const
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{
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// check the types are equal and then create the rhs variable
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// used by the COMPARE_StateAttribute_Paramter macro's below.
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COMPARE_StateAttribute_Types(BlendFunc,sa)
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// compare each paramter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_source_factor)
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COMPARE_StateAttribute_Parameter(_destination_factor)
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return 0; // passed all the above comparison macro's, must be equal.
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}
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virtual void getAssociatedModes(std::vector<GLMode>& modes) const
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{
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modes.push_back(GL_BLEND);
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}
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enum BlendFuncMode {
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DST_ALPHA = GL_DST_ALPHA,
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DST_COLOR = GL_DST_COLOR,
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ONE = GL_ONE,
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ONE_MINUS_DST_ALPHA = GL_ONE_MINUS_DST_ALPHA,
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ONE_MINUS_DST_COLOR = GL_ONE_MINUS_DST_COLOR,
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ONE_MINUS_SRC_ALPHA = GL_ONE_MINUS_SRC_ALPHA,
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ONE_MINUS_SRC_COLOR = GL_ONE_MINUS_SRC_COLOR,
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SRC_ALPHA = GL_SRC_ALPHA,
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SRC_ALPHA_SATURATE = GL_SRC_ALPHA_SATURATE,
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SRC_COLOR = GL_SRC_COLOR,
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ZERO = GL_ZERO
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};
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inline void setFunction( GLenum source, GLenum destination )
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{
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_source_factor = source;
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_destination_factor = destination;
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}
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void setSource(GLenum source) { _source_factor = source; }
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inline GLenum getSource() const { return _source_factor; }
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void setDestination(GLenum destination) { _destination_factor = destination; }
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inline GLenum getDestination() const { return _destination_factor; }
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virtual void apply(State& state) const;
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protected :
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virtual ~BlendFunc();
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GLenum _source_factor;
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GLenum _destination_factor;
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};
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}
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#endif
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