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OpenSceneGraph/include/osg/BufferIndexBinding

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From Tim Moore, "Here is initial support for uniform buffer objects. The binding between a buffer object and an indexed target is implemented as a new StateAttribute, UniformBufferBinding. I've included an example program based on the code in the ARB_uniform_buffer_object specification. A few things remain to do: * The binding between a uniform block in a shader program and a buffer indexed target number is fixed, like a vertex attribute binding. This is too restrictive because that binding can be changed without relinking the program. This mapping should be done by name in the same way that uniform values are handled i.e., like a pseudo state attribute; * There's no direct way yet to query for the offset of uniforms in uniform block, so only the std140 layout is really usable. A helper class that implemented the std140 rules would be quite helpful for setting up uniform blocks without having to link a program first; * There's no direct support for querying parameters such as the maximum block length, minimum offset alignment, etc. Having that information available outside of the draw thread would make certain instancing techniques easier to implement."
2010-11-30 01:43:27 +08:00
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
* Copyright (C) 2010 Tim Moore
From David Callu, "Here an update of osg::Uniform : - add non square matrix - add double - add all uniform type available in OpenGL 4.2 - backward compatibility for Matrixd to set/get an float uniform matrix - update of IVE / Wrapper ReadWriter implementation of AtomicCounterBuffer based on BufferIndexBinding add example that use AtomicCounterBuffer and show rendering order of fragments, original idea from geeks3d.com."
2012-03-29 17:43:12 +08:00
* Copyright (C) 2012 David Callu
From Tim Moore, "Here is initial support for uniform buffer objects. The binding between a buffer object and an indexed target is implemented as a new StateAttribute, UniformBufferBinding. I've included an example program based on the code in the ARB_uniform_buffer_object specification. A few things remain to do: * The binding between a uniform block in a shader program and a buffer indexed target number is fixed, like a vertex attribute binding. This is too restrictive because that binding can be changed without relinking the program. This mapping should be done by name in the same way that uniform values are handled i.e., like a pseudo state attribute; * There's no direct way yet to query for the offset of uniforms in uniform block, so only the std140 layout is really usable. A helper class that implemented the std140 rules would be quite helpful for setting up uniform blocks without having to link a program first; * There's no direct support for querying parameters such as the maximum block length, minimum offset alignment, etc. Having that information available outside of the draw thread would make certain instancing techniques easier to implement."
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*
Ran script to remove trailing spaces and tabs
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* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
From Tim Moore, "Here is initial support for uniform buffer objects. The binding between a buffer object and an indexed target is implemented as a new StateAttribute, UniformBufferBinding. I've included an example program based on the code in the ARB_uniform_buffer_object specification. A few things remain to do: * The binding between a uniform block in a shader program and a buffer indexed target number is fixed, like a vertex attribute binding. This is too restrictive because that binding can be changed without relinking the program. This mapping should be done by name in the same way that uniform values are handled i.e., like a pseudo state attribute; * There's no direct way yet to query for the offset of uniforms in uniform block, so only the std140 layout is really usable. A helper class that implemented the std140 rules would be quite helpful for setting up uniform blocks without having to link a program first; * There's no direct support for querying parameters such as the maximum block length, minimum offset alignment, etc. Having that information available outside of the draw thread would make certain instancing techniques easier to implement."
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* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
Ran script to remove trailing spaces and tabs
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*
From Tim Moore, "Here is initial support for uniform buffer objects. The binding between a buffer object and an indexed target is implemented as a new StateAttribute, UniformBufferBinding. I've included an example program based on the code in the ARB_uniform_buffer_object specification. A few things remain to do: * The binding between a uniform block in a shader program and a buffer indexed target number is fixed, like a vertex attribute binding. This is too restrictive because that binding can be changed without relinking the program. This mapping should be done by name in the same way that uniform values are handled i.e., like a pseudo state attribute; * There's no direct way yet to query for the offset of uniforms in uniform block, so only the std140 layout is really usable. A helper class that implemented the std140 rules would be quite helpful for setting up uniform blocks without having to link a program first; * There's no direct support for querying parameters such as the maximum block length, minimum offset alignment, etc. Having that information available outside of the draw thread would make certain instancing techniques easier to implement."
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* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
Ran script to remove trailing spaces and tabs
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
From Tim Moore, "Here is initial support for uniform buffer objects. The binding between a buffer object and an indexed target is implemented as a new StateAttribute, UniformBufferBinding. I've included an example program based on the code in the ARB_uniform_buffer_object specification. A few things remain to do: * The binding between a uniform block in a shader program and a buffer indexed target number is fixed, like a vertex attribute binding. This is too restrictive because that binding can be changed without relinking the program. This mapping should be done by name in the same way that uniform values are handled i.e., like a pseudo state attribute; * There's no direct way yet to query for the offset of uniforms in uniform block, so only the std140 layout is really usable. A helper class that implemented the std140 rules would be quite helpful for setting up uniform blocks without having to link a program first; * There's no direct support for querying parameters such as the maximum block length, minimum offset alignment, etc. Having that information available outside of the draw thread would make certain instancing techniques easier to implement."
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* OpenSceneGraph Public License for more details.
*/
#ifndef OSG_BUFFERINDEXBINDING
#define OSG_BUFFERINDEXBINDING 1
From Wang Rui, Compile fixes
2010-11-30 16:12:06 +08:00
From David Callu, "Here an update of osg::Uniform : - add non square matrix - add double - add all uniform type available in OpenGL 4.2 - backward compatibility for Matrixd to set/get an float uniform matrix - update of IVE / Wrapper ReadWriter implementation of AtomicCounterBuffer based on BufferIndexBinding add example that use AtomicCounterBuffer and show rendering order of fragments, original idea from geeks3d.com."
2012-03-29 17:43:12 +08:00
#include <osg/Array>
From Tim Moore, "Here is initial support for uniform buffer objects. The binding between a buffer object and an indexed target is implemented as a new StateAttribute, UniformBufferBinding. I've included an example program based on the code in the ARB_uniform_buffer_object specification. A few things remain to do: * The binding between a uniform block in a shader program and a buffer indexed target number is fixed, like a vertex attribute binding. This is too restrictive because that binding can be changed without relinking the program. This mapping should be done by name in the same way that uniform values are handled i.e., like a pseudo state attribute; * There's no direct way yet to query for the offset of uniforms in uniform block, so only the std140 layout is really usable. A helper class that implemented the std140 rules would be quite helpful for setting up uniform blocks without having to link a program first; * There's no direct support for querying parameters such as the maximum block length, minimum offset alignment, etc. Having that information available outside of the draw thread would make certain instancing techniques easier to implement."
2010-11-30 01:43:27 +08:00
#include <osg/Export>
#include <osg/BufferObject>
#include <osg/StateAttribute>
From Wang Rui, Compile fixes
2010-11-30 16:12:06 +08:00
#ifndef GL_TRANSFORM_FEEDBACK_BUFFER
#define GL_TRANSFORM_FEEDBACK_BUFFER 0x8C8E
#endif
From David Callu, "Here an update of osg::Uniform : - add non square matrix - add double - add all uniform type available in OpenGL 4.2 - backward compatibility for Matrixd to set/get an float uniform matrix - update of IVE / Wrapper ReadWriter implementation of AtomicCounterBuffer based on BufferIndexBinding add example that use AtomicCounterBuffer and show rendering order of fragments, original idea from geeks3d.com."
2012-03-29 17:43:12 +08:00
From Tim Moore, "Here is initial support for uniform buffer objects. The binding between a buffer object and an indexed target is implemented as a new StateAttribute, UniformBufferBinding. I've included an example program based on the code in the ARB_uniform_buffer_object specification. A few things remain to do: * The binding between a uniform block in a shader program and a buffer indexed target number is fixed, like a vertex attribute binding. This is too restrictive because that binding can be changed without relinking the program. This mapping should be done by name in the same way that uniform values are handled i.e., like a pseudo state attribute; * There's no direct way yet to query for the offset of uniforms in uniform block, so only the std140 layout is really usable. A helper class that implemented the std140 rules would be quite helpful for setting up uniform blocks without having to link a program first; * There's no direct support for querying parameters such as the maximum block length, minimum offset alignment, etc. Having that information available outside of the draw thread would make certain instancing techniques easier to implement."
2010-11-30 01:43:27 +08:00
namespace osg {
class State;
/** Encapsulate binding buffer objects to index targets. This
* specifically supports the uniform buffer and transform feedback
* targets.
*/
// Common implementation superclass
class OSG_EXPORT BufferIndexBinding : public StateAttribute
{
protected:
BufferIndexBinding(GLenum target, GLuint index);
BufferIndexBinding(GLenum target, GLuint index, BufferObject* bo, GLintptr offset,
GLsizeiptr size);
BufferIndexBinding(const BufferIndexBinding& rhs, const CopyOp& copyop=CopyOp::SHALLOW_COPY);
public:
// The member value is part of the key to this state attribute in
// the State class. Using the index target, we can seperately
// track the bindings for many different index targets.
virtual unsigned getMember() const { return static_cast<unsigned int>(_index); }
Ran script to remove trailing spaces and tabs
2012-03-22 01:36:20 +08:00
From Tim Moore, "Here is initial support for uniform buffer objects. The binding between a buffer object and an indexed target is implemented as a new StateAttribute, UniformBufferBinding. I've included an example program based on the code in the ARB_uniform_buffer_object specification. A few things remain to do: * The binding between a uniform block in a shader program and a buffer indexed target number is fixed, like a vertex attribute binding. This is too restrictive because that binding can be changed without relinking the program. This mapping should be done by name in the same way that uniform values are handled i.e., like a pseudo state attribute; * There's no direct way yet to query for the offset of uniforms in uniform block, so only the std140 layout is really usable. A helper class that implemented the std140 rules would be quite helpful for setting up uniform blocks without having to link a program first; * There's no direct support for querying parameters such as the maximum block length, minimum offset alignment, etc. Having that information available outside of the draw thread would make certain instancing techniques easier to implement."
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GLenum getTarget() const { return _target; }
/** Get the index target.
*/
GLuint getIndex() const { return _index; }
/** Set the buffer object that will be bound to the index target.
*/
void setBufferObject(BufferObject *bo) { _bufferObject = bo; }
/** Get the buffer object to be bound.
*/
BufferObject* getBufferObject() const { return _bufferObject.get(); }
/** Set the starting offset into the buffer object for data for
the indexed target. Note: the required alignment on the offset
may be quite large (e.g., 256 bytes on NVidia 8600M). This
should be checked with glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT...).
*/
void setOffset(GLintptr offset) { _offset = offset; }
GLintptr getOffset() const { return _offset; }
/** Set the size of data for the indexed target.
*/
void setSize(GLsizeiptr size) { _size = size; }
GLsizeiptr getSize() const { return _size; }
virtual void apply(State& state) const;
protected:
virtual ~BufferIndexBinding();
const GLenum _target;
const GLuint _index;
ref_ptr<BufferObject> _bufferObject;
GLintptr _offset;
GLsizeiptr _size;
};
/** StateAttribute for binding a uniform buffer index target.
*/
class OSG_EXPORT UniformBufferBinding : public BufferIndexBinding
{
public:
UniformBufferBinding();
UniformBufferBinding(GLuint index);
/** Create a binding for a uniform buffer index target.
* @param index the index target
* @param bo associated buffer object
* @param offset offset into buffer object
* @param size size of data in buffer object
*/
UniformBufferBinding(GLuint index, BufferObject* bo, GLintptr offset, GLsizeiptr size);
UniformBufferBinding(const UniformBufferBinding& rhs, const CopyOp& copyop=CopyOp::SHALLOW_COPY);
META_StateAttribute(osg, UniformBufferBinding, UNIFORMBUFFERBINDING);
virtual int compare(const StateAttribute& bb) const
{
COMPARE_StateAttribute_Types(UniformBufferBinding, bb)
COMPARE_StateAttribute_Parameter(_target)
COMPARE_StateAttribute_Parameter(_index)
COMPARE_StateAttribute_Parameter(_bufferObject)
COMPARE_StateAttribute_Parameter(_offset)
COMPARE_StateAttribute_Parameter(_size)
return 0;
}
};
/** StateAttribute for binding a transform feedback index target.
*/
class OSG_EXPORT TransformFeedbackBufferBinding : public BufferIndexBinding
{
public:
TransformFeedbackBufferBinding(GLuint index = 0);
TransformFeedbackBufferBinding(GLuint index, BufferObject* bo, GLintptr offset, GLsizeiptr size);
TransformFeedbackBufferBinding(const TransformFeedbackBufferBinding& rhs, const CopyOp& copyop=CopyOp::SHALLOW_COPY);
META_StateAttribute(osg, TransformFeedbackBufferBinding, TRANSFORMFEEDBACKBUFFERBINDING);
virtual int compare(const StateAttribute& bb) const
{
COMPARE_StateAttribute_Types(TransformFeedbackBufferBinding, bb)
COMPARE_StateAttribute_Parameter(_target)
COMPARE_StateAttribute_Parameter(_index)
COMPARE_StateAttribute_Parameter(_bufferObject)
COMPARE_StateAttribute_Parameter(_offset)
COMPARE_StateAttribute_Parameter(_size)
return 0;
}
};
From David Callu, "Here an update of osg::Uniform : - add non square matrix - add double - add all uniform type available in OpenGL 4.2 - backward compatibility for Matrixd to set/get an float uniform matrix - update of IVE / Wrapper ReadWriter implementation of AtomicCounterBuffer based on BufferIndexBinding add example that use AtomicCounterBuffer and show rendering order of fragments, original idea from geeks3d.com."
2012-03-29 17:43:12 +08:00
/** StateAttribute for binding a atomic counter buffer index target.
*/
class OSG_EXPORT AtomicCounterBufferBinding : public BufferIndexBinding
{
public:
AtomicCounterBufferBinding(GLuint index=0);
/** Create a binding for a atomic counter buffer index target.
* @param index the index target
* @param bo associated buffer object
* @param offset offset into buffer object
* @param size size of data in buffer object
*/
AtomicCounterBufferBinding(GLuint index, BufferObject* bo, GLintptr offset, GLsizeiptr size);
AtomicCounterBufferBinding(const AtomicCounterBufferBinding& rhs, const CopyOp& copyop=CopyOp::SHALLOW_COPY);
META_StateAttribute(osg, AtomicCounterBufferBinding, ATOMICCOUNTERBUFFERBINDING);
void readData(osg::State & state, osg::UIntArray & uintArray) const;
virtual int compare(const StateAttribute& bb) const
{
COMPARE_StateAttribute_Types(AtomicCounterBufferBinding, bb)
COMPARE_StateAttribute_Parameter(_target)
COMPARE_StateAttribute_Parameter(_index)
COMPARE_StateAttribute_Parameter(_bufferObject)
COMPARE_StateAttribute_Parameter(_offset)
COMPARE_StateAttribute_Parameter(_size)
return 0;
}
};
From Marcus Hein, Added support for OpenGL SSBO and SSBB via osg::ShaderStorageBufferObject and osg::ShaderStorageBufferBinding to core OSG library, and added new osgSSBO example git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14599 16af8721-9629-0410-8352-f15c8da7e697
2014-12-10 20:23:04 +08:00
class OSG_EXPORT ShaderStorageBufferBinding : public BufferIndexBinding
{
public:
ShaderStorageBufferBinding(GLuint index=0);
/** Create a binding for a shader storage buffer index target.
* @param index the index target
* @param bo associated buffer object
* @param offset offset into buffer object
* @param size size of data in buffer object
*/
ShaderStorageBufferBinding(GLuint index, BufferObject* bo, GLintptr offset, GLsizeiptr size);
ShaderStorageBufferBinding(const ShaderStorageBufferBinding& rhs, const CopyOp& copyop=CopyOp::SHALLOW_COPY);
META_StateAttribute(osg, ShaderStorageBufferBinding, SHADERSTORAGEBUFFERBINDING);
virtual int compare(const StateAttribute& bb) const
{
COMPARE_StateAttribute_Types(ShaderStorageBufferBinding, bb)
COMPARE_StateAttribute_Parameter(_target)
COMPARE_StateAttribute_Parameter(_index)
COMPARE_StateAttribute_Parameter(_bufferObject)
COMPARE_StateAttribute_Parameter(_offset)
COMPARE_StateAttribute_Parameter(_size)
return 0;
}
};
From David Callu, "Here an update of osg::Uniform : - add non square matrix - add double - add all uniform type available in OpenGL 4.2 - backward compatibility for Matrixd to set/get an float uniform matrix - update of IVE / Wrapper ReadWriter implementation of AtomicCounterBuffer based on BufferIndexBinding add example that use AtomicCounterBuffer and show rendering order of fragments, original idea from geeks3d.com."
2012-03-29 17:43:12 +08:00
} // namespace osg
From Tim Moore, "Here is initial support for uniform buffer objects. The binding between a buffer object and an indexed target is implemented as a new StateAttribute, UniformBufferBinding. I've included an example program based on the code in the ARB_uniform_buffer_object specification. A few things remain to do: * The binding between a uniform block in a shader program and a buffer indexed target number is fixed, like a vertex attribute binding. This is too restrictive because that binding can be changed without relinking the program. This mapping should be done by name in the same way that uniform values are handled i.e., like a pseudo state attribute; * There's no direct way yet to query for the offset of uniforms in uniform block, so only the std140 layout is really usable. A helper class that implemented the std140 rules would be quite helpful for setting up uniform blocks without having to link a program first; * There's no direct support for querying parameters such as the maximum block length, minimum offset alignment, etc. Having that information available outside of the draw thread would make certain instancing techniques easier to implement."
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#endif
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