298 lines
13 KiB
C++
298 lines
13 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSG_FRAGMENTPROGRAM
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#define OSG_FRAGMENTPROGRAM 1
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#include <osg/StateAttribute>
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#include <osg/Vec4>
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#include <osg/Matrix>
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#include <osg/buffered_value>
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#include <map>
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#include <string>
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// if not defined by gl.h use the definition found in:
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// http://oss.sgi.com/projects/ogl-sample/registry/ARB/fragment_program.txt
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#ifndef GL_ARB_fragment_program
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#define GL_FRAGMENT_PROGRAM_ARB 0x8804
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#define GL_PROGRAM_FORMAT_ASCII_ARB 0x8875
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#define GL_PROGRAM_LENGTH_ARB 0x8627
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#define GL_PROGRAM_FORMAT_ARB 0x8876
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#define GL_PROGRAM_BINDING_ARB 0x8677
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#define GL_PROGRAM_INSTRUCTIONS_ARB 0x88A0
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#define GL_MAX_PROGRAM_INSTRUCTIONS_ARB 0x88A1
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#define GL_PROGRAM_NATIVE_INSTRUCTIONS_ARB 0x88A2
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#define GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB 0x88A3
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#define GL_PROGRAM_TEMPORARIES_ARB 0x88A4
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#define GL_MAX_PROGRAM_TEMPORARIES_ARB 0x88A5
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#define GL_PROGRAM_NATIVE_TEMPORARIES_ARB 0x88A6
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#define GL_MAX_PROGRAM_NATIVE_TEMPORARIES_ARB 0x88A7
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#define GL_PROGRAM_PARAMETERS_ARB 0x88A8
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#define GL_MAX_PROGRAM_PARAMETERS_ARB 0x88A9
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#define GL_PROGRAM_NATIVE_PARAMETERS_ARB 0x88AA
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#define GL_MAX_PROGRAM_NATIVE_PARAMETERS_ARB 0x88AB
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#define GL_PROGRAM_ATTRIBS_ARB 0x88AC
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#define GL_MAX_PROGRAM_ATTRIBS_ARB 0x88AD
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#define GL_PROGRAM_NATIVE_ATTRIBS_ARB 0x88AE
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#define GL_MAX_PROGRAM_NATIVE_ATTRIBS_ARB 0x88AF
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#define GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB 0x88B4
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#define GL_MAX_PROGRAM_ENV_PARAMETERS_ARB 0x88B5
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#define GL_PROGRAM_UNDER_NATIVE_LIMITS_ARB 0x88B6
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#define GL_PROGRAM_ALU_INSTRUCTIONS_ARB 0x8805
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#define GL_PROGRAM_TEX_INSTRUCTIONS_ARB 0x8806
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#define GL_PROGRAM_TEX_INDIRECTIONS_ARB 0x8807
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#define GL_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB 0x8808
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#define GL_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB 0x8809
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#define GL_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB 0x880A
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#define GL_MAX_PROGRAM_ALU_INSTRUCTIONS_ARB 0x880B
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#define GL_MAX_PROGRAM_TEX_INSTRUCTIONS_ARB 0x880C
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#define GL_MAX_PROGRAM_TEX_INDIRECTIONS_ARB 0x880D
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#define GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB 0x880E
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#define GL_MAX_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB 0x880F
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#define GL_MAX_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB 0x8810
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#define GL_PROGRAM_STRING_ARB 0x8628
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#define GL_PROGRAM_ERROR_POSITION_ARB 0x864B
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#define GL_CURRENT_MATRIX_ARB 0x8641
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#define GL_TRANSPOSE_CURRENT_MATRIX_ARB 0x88B7
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#define GL_CURRENT_MATRIX_STACK_DEPTH_ARB 0x8640
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#define GL_MAX_PROGRAM_MATRICES_ARB 0x862F
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#define GL_MAX_PROGRAM_MATRIX_STACK_DEPTH_ARB 0x862E
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#define GL_MAX_TEXTURE_COORDS_ARB 0x8871
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#define GL_MAX_TEXTURE_IMAGE_UNITS_ARB 0x8872
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#define GL_PROGRAM_ERROR_STRING_ARB 0x8874
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#define GL_MATRIX0_ARB 0x88C0
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#define GL_MATRIX1_ARB 0x88C1
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#define GL_MATRIX2_ARB 0x88C2
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#define GL_MATRIX3_ARB 0x88C3
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#define GL_MATRIX4_ARB 0x88C4
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#define GL_MATRIX5_ARB 0x88C5
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#define GL_MATRIX6_ARB 0x88C6
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#define GL_MATRIX7_ARB 0x88C7
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#define GL_MATRIX8_ARB 0x88C8
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#define GL_MATRIX9_ARB 0x88C9
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#define GL_MATRIX10_ARB 0x88CA
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#define GL_MATRIX11_ARB 0x88CB
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#define GL_MATRIX12_ARB 0x88CC
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#define GL_MATRIX13_ARB 0x88CD
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#define GL_MATRIX14_ARB 0x88CE
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#define GL_MATRIX15_ARB 0x88CF
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#define GL_MATRIX16_ARB 0x88D0
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#define GL_MATRIX17_ARB 0x88D1
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#define GL_MATRIX18_ARB 0x88D2
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#define GL_MATRIX19_ARB 0x88D3
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#define GL_MATRIX20_ARB 0x88D4
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#define GL_MATRIX21_ARB 0x88D5
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#define GL_MATRIX22_ARB 0x88D6
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#define GL_MATRIX23_ARB 0x88D7
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#define GL_MATRIX24_ARB 0x88D8
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#define GL_MATRIX25_ARB 0x88D9
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#define GL_MATRIX26_ARB 0x88DA
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#define GL_MATRIX27_ARB 0x88DB
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#define GL_MATRIX28_ARB 0x88DC
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#define GL_MATRIX29_ARB 0x88DD
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#define GL_MATRIX30_ARB 0x88DE
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#define GL_MATRIX31_ARB 0x88DF
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#endif
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namespace osg {
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/** FragmentProgram - encapsulates the OpenGL ARB fragment program state.*/
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class OSG_EXPORT FragmentProgram : public StateAttribute
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{
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public:
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FragmentProgram();
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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FragmentProgram(const FragmentProgram& vp,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
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META_StateAttribute(osg, FragmentProgram, FRAGMENTPROGRAM);
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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 osg::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(FragmentProgram,sa)
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// compare each paramter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_fragmentProgram)
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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 bool getModeUsage(ModeUsage& usage) const
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{
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usage.usesMode(GL_FRAGMENT_PROGRAM_ARB);
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return true;
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}
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// data access methods.
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/** Get the handle to the fragment program id for the current context.*/
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inline GLuint& getFragmentProgramID(unsigned int contextID) const
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{
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return _fragmentProgramIDList[contextID];
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}
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/** Set the fragment program using a C style string.*/
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inline void setFragmentProgram( const char* program )
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{
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_fragmentProgram = program;
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dirtyFragmentProgramObject();
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}
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/** Set the fragment program using C++ style string.*/
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inline void setFragmentProgram( const std::string& program )
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{
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_fragmentProgram = program;
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dirtyFragmentProgramObject();
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}
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/** Get the fragment program.*/
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inline const std::string& getFragmentProgram() const { return _fragmentProgram; }
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/** Set Program Parameters */
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inline void setProgramLocalParameter(const GLuint index, const Vec4& p)
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{
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_programLocalParameters[index] = p;
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}
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typedef std::map<GLuint,Vec4> LocalParamList;
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/** Set list of Program Parameters */
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inline void setLocalParameters(const LocalParamList& lpl) { _programLocalParameters = lpl; }
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/** Get list of Program Parameters */
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inline LocalParamList& getLocalParameters() { return _programLocalParameters; }
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/** Get const list of Program Parameters */
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inline const LocalParamList& getLocalParameters() const { return _programLocalParameters; }
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/** Matrix */
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inline void setMatrix(const GLenum mode, const Matrix& matrix)
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{
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_matrixList[mode] = matrix;
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}
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typedef std::map<GLenum,Matrix> MatrixList;
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/** Set list of Matrices */
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inline void setMatrices(const MatrixList& matrices) { _matrixList = matrices; }
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/** Get list of Matrices */
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inline MatrixList& getMatrices() { return _matrixList; }
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/** Get list of Matrices */
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inline const MatrixList& getMatrices() const { return _matrixList; }
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/** Force a recompile on next apply() of associated OpenGL vertex program objects.*/
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void dirtyFragmentProgramObject();
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/** use deleteFragmentProgramObject instead of glDeletePrograms to allow
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* OpenGL Fragment Program objects to be cached until they can be deleted
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* by the OpenGL context in which they were created, specified
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* by contextID.*/
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static void deleteFragmentProgramObject(unsigned int contextID,GLuint handle);
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/** flush all the cached fragment programs which need to be deleted
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* in the OpenGL context related to contextID.*/
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static void flushDeletedFragmentProgramObjects(unsigned int contextID,double currentTime, double& availableTime);
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virtual void apply(State& state) const;
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virtual void compileGLObjects(State& state) const { apply(state); }
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/** release an OpenGL objects in specified graphics context if State
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object is passed, otherwise release OpenGL objexts for all graphics context if
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State object pointer == NULL.*/
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virtual void releaseGLObjects(State* state=0) const;
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/** Extensions class which encapsulates the querying of extensions and
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* associated function pointers, and provide convenience wrappers to
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* check for the extensions or use the associated functions.*/
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class OSG_EXPORT Extensions : public osg::Referenced
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{
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public:
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Extensions(unsigned int contextID);
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Extensions(const Extensions& rhs);
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void lowestCommonDenominator(const Extensions& rhs);
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void setupGLExtenions(unsigned int contextID);
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void setFragmentProgramSupported(bool flag) { _isFragmentProgramSupported=flag; }
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bool isFragmentProgramSupported() const { return _isFragmentProgramSupported; }
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void glBindProgram(GLenum target, GLuint id) const;
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void glGenPrograms(GLsizei n, GLuint *programs) const;
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void glDeletePrograms(GLsizei n, GLuint *programs) const;
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void glProgramString(GLenum target, GLenum format, GLsizei len, const void *string) const;
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void glProgramLocalParameter4fv(GLenum target, GLuint index, const GLfloat *params) const;
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protected:
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~Extensions() {}
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bool _isFragmentProgramSupported;
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void* _glBindProgram;
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void* _glGenPrograms;
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void *_glDeletePrograms;
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void* _glProgramString;
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void* _glProgramLocalParameter4fv;
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};
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/** Function to call to get the extension of a specified context.
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* If the Extension object for that context has not yet been created and the
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* 'createIfNotInitalized' flag has been set to false then returns NULL.
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* If 'createIfNotInitalized' is true then the Extensions object is
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* automatically created. However, in this case the extension object will
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* only be created with the graphics context associated with ContextID..*/
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static Extensions* getExtensions(unsigned int contextID,bool createIfNotInitalized);
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/** setExtensions allows users to override the extensions across graphics contexts.
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* typically used when you have different extensions supported across graphics pipes
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* but need to ensure that they all use the same low common denominator extensions.*/
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static void setExtensions(unsigned int contextID,Extensions* extensions);
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protected:
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virtual ~FragmentProgram();
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typedef buffered_value<GLuint> FragmentProgramIDList;
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mutable FragmentProgramIDList _fragmentProgramIDList;
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std::string _fragmentProgram;
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LocalParamList _programLocalParameters;
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MatrixList _matrixList;
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};
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}
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#endif
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