root/OpenSceneGraph/trunk/include/osg/ShaderAttribute @ 13041

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1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2004 Robert Osfield
2 *
3 * This library is open source and may be redistributed and/or modified under
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version.  The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * OpenSceneGraph Public License for more details.
12*/
13
14#ifndef OSG_SHADERATTRIBUTE
15#define OSG_SHADERATTRIBUTE 1
16
17#include <osg/StateAttribute>
18#include <osg/Shader>
19#include <osg/Uniform>
20
21namespace osg {
22
23class OSG_EXPORT ShaderAttribute : public StateAttribute
24{
25    public :
26
27        ShaderAttribute();
28
29        /** Copy constructor using CopyOp to manage deep vs shallow copy. */
30        ShaderAttribute(const ShaderAttribute& sa,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
31
32        virtual osg::Object* cloneType() const;
33        virtual osg::Object* clone(const osg::CopyOp& copyop) const { return new ShaderAttribute(*this,copyop); }
34        virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const ShaderAttribute *>(obj)!=NULL; }
35        virtual const char* libraryName() const { return "osg"; }
36        virtual const char* className() const { return "ShaderAttribute"; }
37
38        /** return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
39        virtual int compare(const StateAttribute& sa) const;
40
41
42        void setType(Type type);
43        virtual Type getType() const { return _type; }
44
45        unsigned int addShader(Shader* shader) { return _shaderComponent->addShader(shader); }
46        void removeShader(unsigned int i) { _shaderComponent->removeShader(i); }
47        unsigned int getNumShaders() const { return _shaderComponent->getNumShaders(); }
48        Shader* getShader(unsigned int i) { return _shaderComponent->getShader(i); }
49        const Shader* getShader(unsigned int i) const { return _shaderComponent->getShader(i); }
50
51        unsigned int addUniform(Uniform* uniform);
52        void removeUniform(unsigned int i);
53        unsigned int getNumUniforms() const { return _uniforms.size(); }
54        Uniform* getUniform(unsigned int i) { return _uniforms[i].get(); }
55        const Uniform* getUniform(unsigned int i) const { return _uniforms[i].get(); }
56
57        virtual bool getModeUsage(StateAttribute::ModeUsage& usage) const;
58
59        virtual void apply(State& state) const;
60
61        virtual void compileGLObjects(State& state) const;
62
63        virtual void resizeGLObjectBuffers(unsigned int maxSize);
64
65        virtual void releaseGLObjects(State* state=0) const;
66
67    protected :
68
69        virtual ~ShaderAttribute();
70
71        typedef std::vector< osg::ref_ptr<osg::Uniform> > Uniforms;
72
73        Type _type;
74        Uniforms _uniforms;
75};
76
77}
78
79#endif
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