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OpenSceneGraph/include/osg/FragmentProgram
Robert Osfield aa833acfd3 Added support for releasing GLObjects, and renamed DisplayListVisitor the 
GLObjectVisitor to better fit its function, and added support for releasing
objects as well as compiling them.
2004-07-20 05:37:59 +00:00

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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
*
* 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
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* 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
* OpenSceneGraph Public License for more details.
*/
#ifndef OSG_FRAGMENTPROGRAM
#define OSG_FRAGMENTPROGRAM 1
#include <osg/StateAttribute>
#include <osg/Vec4>
#include <osg/Matrix>
#include <osg/buffered_value>
#include <map>
#include <string>
// if not defined by gl.h use the definition found in:
// http://oss.sgi.com/projects/ogl-sample/registry/ARB/fragment_program.txt
#ifndef GL_ARB_fragment_program
#define GL_FRAGMENT_PROGRAM_ARB 0x8804
#define GL_PROGRAM_FORMAT_ASCII_ARB 0x8875
#define GL_PROGRAM_LENGTH_ARB 0x8627
#define GL_PROGRAM_FORMAT_ARB 0x8876
#define GL_PROGRAM_BINDING_ARB 0x8677
#define GL_PROGRAM_INSTRUCTIONS_ARB 0x88A0
#define GL_MAX_PROGRAM_INSTRUCTIONS_ARB 0x88A1
#define GL_PROGRAM_NATIVE_INSTRUCTIONS_ARB 0x88A2
#define GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB 0x88A3
#define GL_PROGRAM_TEMPORARIES_ARB 0x88A4
#define GL_MAX_PROGRAM_TEMPORARIES_ARB 0x88A5
#define GL_PROGRAM_NATIVE_TEMPORARIES_ARB 0x88A6
#define GL_MAX_PROGRAM_NATIVE_TEMPORARIES_ARB 0x88A7
#define GL_PROGRAM_PARAMETERS_ARB 0x88A8
#define GL_MAX_PROGRAM_PARAMETERS_ARB 0x88A9
#define GL_PROGRAM_NATIVE_PARAMETERS_ARB 0x88AA
#define GL_MAX_PROGRAM_NATIVE_PARAMETERS_ARB 0x88AB
#define GL_PROGRAM_ATTRIBS_ARB 0x88AC
#define GL_MAX_PROGRAM_ATTRIBS_ARB 0x88AD
#define GL_PROGRAM_NATIVE_ATTRIBS_ARB 0x88AE
#define GL_MAX_PROGRAM_NATIVE_ATTRIBS_ARB 0x88AF
#define GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB 0x88B4
#define GL_MAX_PROGRAM_ENV_PARAMETERS_ARB 0x88B5
#define GL_PROGRAM_UNDER_NATIVE_LIMITS_ARB 0x88B6
#define GL_PROGRAM_ALU_INSTRUCTIONS_ARB 0x8805
#define GL_PROGRAM_TEX_INSTRUCTIONS_ARB 0x8806
#define GL_PROGRAM_TEX_INDIRECTIONS_ARB 0x8807
#define GL_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB 0x8808
#define GL_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB 0x8809
#define GL_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB 0x880A
#define GL_MAX_PROGRAM_ALU_INSTRUCTIONS_ARB 0x880B
#define GL_MAX_PROGRAM_TEX_INSTRUCTIONS_ARB 0x880C
#define GL_MAX_PROGRAM_TEX_INDIRECTIONS_ARB 0x880D
#define GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB 0x880E
#define GL_MAX_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB 0x880F
#define GL_MAX_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB 0x8810
#define GL_PROGRAM_STRING_ARB 0x8628
#define GL_PROGRAM_ERROR_POSITION_ARB 0x864B
#define GL_CURRENT_MATRIX_ARB 0x8641
#define GL_TRANSPOSE_CURRENT_MATRIX_ARB 0x88B7
#define GL_CURRENT_MATRIX_STACK_DEPTH_ARB 0x8640
#define GL_MAX_PROGRAM_MATRICES_ARB 0x862F
#define GL_MAX_PROGRAM_MATRIX_STACK_DEPTH_ARB 0x862E
#define GL_MAX_TEXTURE_COORDS_ARB 0x8871
#define GL_MAX_TEXTURE_IMAGE_UNITS_ARB 0x8872
#define GL_PROGRAM_ERROR_STRING_ARB 0x8874
#define GL_MATRIX0_ARB 0x88C0
#define GL_MATRIX1_ARB 0x88C1
#define GL_MATRIX2_ARB 0x88C2
#define GL_MATRIX3_ARB 0x88C3
#define GL_MATRIX4_ARB 0x88C4
#define GL_MATRIX5_ARB 0x88C5
#define GL_MATRIX6_ARB 0x88C6
#define GL_MATRIX7_ARB 0x88C7
#define GL_MATRIX8_ARB 0x88C8
#define GL_MATRIX9_ARB 0x88C9
#define GL_MATRIX10_ARB 0x88CA
#define GL_MATRIX11_ARB 0x88CB
#define GL_MATRIX12_ARB 0x88CC
#define GL_MATRIX13_ARB 0x88CD
#define GL_MATRIX14_ARB 0x88CE
#define GL_MATRIX15_ARB 0x88CF
#define GL_MATRIX16_ARB 0x88D0
#define GL_MATRIX17_ARB 0x88D1
#define GL_MATRIX18_ARB 0x88D2
#define GL_MATRIX19_ARB 0x88D3
#define GL_MATRIX20_ARB 0x88D4
#define GL_MATRIX21_ARB 0x88D5
#define GL_MATRIX22_ARB 0x88D6
#define GL_MATRIX23_ARB 0x88D7
#define GL_MATRIX24_ARB 0x88D8
#define GL_MATRIX25_ARB 0x88D9
#define GL_MATRIX26_ARB 0x88DA
#define GL_MATRIX27_ARB 0x88DB
#define GL_MATRIX28_ARB 0x88DC
#define GL_MATRIX29_ARB 0x88DD
#define GL_MATRIX30_ARB 0x88DE
#define GL_MATRIX31_ARB 0x88DF
#endif
namespace osg {
/** FragmentProgram - encapsulates the OpenGL ARB fragment program state.*/
class SG_EXPORT FragmentProgram : public StateAttribute
{
public:
FragmentProgram();
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
FragmentProgram(const FragmentProgram& vp,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
META_StateAttribute(osg, FragmentProgram, FRAGMENTPROGRAM);
/** return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs.*/
virtual int compare(const osg::StateAttribute& sa) const
{
// check the types are equal and then create the rhs variable
// used by the COMPARE_StateAttribute_Paramter macro's below.
COMPARE_StateAttribute_Types(FragmentProgram,sa)
// compare each paramter in turn against the rhs.
COMPARE_StateAttribute_Parameter(_fragmentProgram)
return 0; // passed all the above comparison macro's, must be equal.
}
virtual bool getModeUsage(ModeUsage& usage) const
{
usage.usesMode(GL_FRAGMENT_PROGRAM_ARB);
return true;
}
// data access methods.
/** Get the handle to the fragment program id for the current context.*/
inline GLuint& getFragmentProgramID(unsigned int contextID) const
{
return _fragmentProgramIDList[contextID];
}
/** Set the fragment program using C++ style string.*/
inline void setFragmentProgram( const std::string& program )
{
_fragmentProgram = program;
dirtyFragmentProgramObject();
}
/** Set the fragment program using a C style string.*/
inline void setFragmentProgram( const char* program )
{
_fragmentProgram = program;
dirtyFragmentProgramObject();
}
/** Get the fragment program.*/
inline const std::string& getFragmentProgram() const { return _fragmentProgram; }
/** Set Program Parameters */
inline void setProgramLocalParameter(const GLuint index, const Vec4& p)
{
_programLocalParameters[index] = p;
}
typedef std::map<GLuint,Vec4> LocalParamList;
/** Get list of Program Parameters */
inline LocalParamList& getLocalParamList() { return _programLocalParameters; }
/** Get const list of Program Parameters */
inline const LocalParamList& getLocalParamList() const { return _programLocalParameters; }
/** Matrix */
inline void setMatrix(const GLenum mode, const Matrix& matrix)
{
_matrixList[mode] = matrix;
}
/** Force a recompile on next apply() of associated OpenGL vertex program objects.*/
void dirtyFragmentProgramObject();
/** use deleteFragmentProgramObject instead of glDeletePrograms to allow
* OpenGL Fragment Program objects to cached until they can be deleted
* by the OpenGL context in which they were created, specified
* by contextID.*/
static void deleteFragmentProgramObject(unsigned int contextID,GLuint handle);
/** flush all the cached fragment programs which need to be deleted
* in the OpenGL context related to contextID.*/
static void flushDeletedFragmentProgramObjects(unsigned int contextID,double currentTime, double& availableTime);
virtual void apply(State& state) const;
virtual void compileGLObjects(State& state) const { apply(state); }
/** release an OpenGL objects in specified graphics context if State
object is passed, otherwise release OpenGL objexts for all graphics context if
State object pointer NULL.*/
virtual void releaseGLObjects(State* state=0) const;
/** Extensions class which encapsulates the querring of extensions and
* associated function pointers, and provide convinience wrappers to
* check for the extensions or use the associated functions.*/
class SG_EXPORT Extensions : public osg::Referenced
{
public:
Extensions();
Extensions(const Extensions& rhs);
void lowestCommonDenominator(const Extensions& rhs);
void setupGLExtenions();
void setFragmentProgramSupported(bool flag) { _isFragmentProgramSupported=flag; }
bool isFragmentProgramSupported() const { return _isFragmentProgramSupported; }
void glBindProgram(GLenum target, GLuint id) const;
void glGenPrograms(GLsizei n, GLuint *programs) const;
void glDeletePrograms(GLsizei n, GLuint *programs) const;
void glProgramString(GLenum target, GLenum format, GLsizei len, const void *string) const;
void glProgramLocalParameter4fv(GLenum target, GLuint index, const GLfloat *params) const;
protected:
~Extensions() {}
bool _isFragmentProgramSupported;
void* _glBindProgram;
void* _glGenPrograms;
void *_glDeletePrograms;
void* _glProgramString;
void* _glProgramLocalParameter4fv;
};
/** Function to call to get the extension of a specified context.
* If the Exentsion object for that context has not yet been created then
* and the 'createIfNotInitalized' flag been set to false then returns NULL.
* If 'createIfNotInitalized' is true then the Extensions object is
* automatically created. However, in this case the extension object
* only be created with the graphics context associated with ContextID..*/
static Extensions* getExtensions(unsigned int contextID,bool createIfNotInitalized);
/** setExtensions allows users to override the extensions across graphics contexts.
* typically used when you have different extensions supported across graphics pipes
* but need to ensure that they all use the same low common denominator extensions.*/
static void setExtensions(unsigned int contextID,Extensions* extensions);
protected:
virtual ~FragmentProgram();
typedef buffered_value<GLuint> FragmentProgramIDList;
mutable FragmentProgramIDList _fragmentProgramIDList;
std::string _fragmentProgram;
LocalParamList _programLocalParameters;
typedef std::map<GLenum,Matrix> MatrixList;
MatrixList _matrixList;
};
}
#endif
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