220 lines
8.8 KiB
Plaintext
220 lines
8.8 KiB
Plaintext
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//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_TEXENVCOMBINE
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#define OSG_TEXENVCOMBINE 1
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#include <osg/GL>
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#include <osg/StateAttribute>
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#include <osg/Vec4>
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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/texture_env_combine.txt
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#ifndef GL_ARB_texture_env_combine
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#define GL_ARB_texture_env_combine 1
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#define GL_COMBINE_ARB 0x8570
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#define GL_COMBINE_RGB_ARB 0x8571
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#define GL_COMBINE_ALPHA_ARB 0x8572
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#define GL_SOURCE0_RGB_ARB 0x8580
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#define GL_SOURCE1_RGB_ARB 0x8581
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#define GL_SOURCE2_RGB_ARB 0x8582
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#define GL_SOURCE0_ALPHA_ARB 0x8588
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#define GL_SOURCE1_ALPHA_ARB 0x8589
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#define GL_SOURCE2_ALPHA_ARB 0x858A
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#define GL_OPERAND0_RGB_ARB 0x8590
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#define GL_OPERAND1_RGB_ARB 0x8591
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#define GL_OPERAND2_RGB_ARB 0x8592
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#define GL_OPERAND0_ALPHA_ARB 0x8598
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#define GL_OPERAND1_ALPHA_ARB 0x8599
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#define GL_OPERAND2_ALPHA_ARB 0x859A
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#define GL_RGB_SCALE_ARB 0x8573
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#define GL_ADD_SIGNED_ARB 0x8574
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#define GL_INTERPOLATE_ARB 0x8575
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#define GL_SUBTRACT_ARB 0x84E7
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#define GL_CONSTANT_ARB 0x8576
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#define GL_PRIMARY_COLOR_ARB 0x8577
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#define GL_PREVIOUS_ARB 0x8578
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#endif
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namespace osg {
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/** TexEnvCombine - encapsulates the OpenGL glTexEnvCombine (texture environment) state.*/
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class SG_EXPORT TexEnvCombine : public StateAttribute
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{
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public :
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TexEnvCombine();
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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TexEnvCombine(const TexEnvCombine& texenv,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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StateAttribute(texenv,copyop),
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_combine_RGB(texenv._combine_RGB),
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_combine_Alpha(texenv._combine_Alpha),
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_source0_RGB(texenv._source0_RGB),
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_source1_RGB(texenv._source1_RGB),
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_source2_RGB(texenv._source2_RGB),
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_source0_Alpha(texenv._source0_Alpha),
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_source1_Alpha(texenv._source1_Alpha),
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_source2_Alpha(texenv._source2_Alpha),
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_operand0_RGB(texenv._operand0_RGB),
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_operand1_RGB(texenv._operand1_RGB),
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_operand2_RGB(texenv._operand2_RGB),
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_operand0_Alpha(texenv._operand0_Alpha),
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_operand1_Alpha(texenv._operand1_Alpha),
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_operand2_Alpha(texenv._operand2_Alpha),
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_scale_RGB(texenv._scale_RGB),
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_scale_Alpha(texenv._scale_Alpha),
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_constantColor(texenv._constantColor) {}
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META_StateAttribute(osg, TexEnvCombine, TEXENV);
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virtual bool isTextureAttribute() const { return true; }
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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(TexEnvCombine,sa)
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// compare each paramter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_combine_RGB)
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COMPARE_StateAttribute_Parameter(_combine_Alpha)
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COMPARE_StateAttribute_Parameter(_source0_RGB)
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COMPARE_StateAttribute_Parameter(_source1_RGB)
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COMPARE_StateAttribute_Parameter(_source2_RGB)
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COMPARE_StateAttribute_Parameter(_source0_Alpha)
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COMPARE_StateAttribute_Parameter(_source1_Alpha)
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COMPARE_StateAttribute_Parameter(_source2_Alpha)
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COMPARE_StateAttribute_Parameter(_operand0_RGB)
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COMPARE_StateAttribute_Parameter(_operand1_RGB)
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COMPARE_StateAttribute_Parameter(_operand2_RGB)
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COMPARE_StateAttribute_Parameter(_operand0_Alpha)
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COMPARE_StateAttribute_Parameter(_operand1_Alpha)
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COMPARE_StateAttribute_Parameter(_operand2_Alpha)
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COMPARE_StateAttribute_Parameter(_scale_RGB)
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COMPARE_StateAttribute_Parameter(_scale_Alpha)
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COMPARE_StateAttribute_Parameter(_constantColor)
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return 0; // passed all the above comparison macro's, must be equal.
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}
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enum CombineParam
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{
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REPLACE = GL_REPLACE,
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MODULATE = GL_MODULATE,
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ADD = GL_ADD,
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ADD_SIGNED = GL_ADD_SIGNED_ARB,
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INTERPOLATE = GL_INTERPOLATE_ARB,
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SUBTRACT = GL_SUBTRACT_ARB
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};
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void setCombineRGB(CombineParam cm) { _combine_RGB = cm; }
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void setCombineAlpha(CombineParam cm) { _combine_Alpha = cm; }
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CombineParam getCombineRGB() const { return _combine_RGB; }
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CombineParam getCombineAlpha() const { return _combine_Alpha; }
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enum SourceParam
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{
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TEXTURE = GL_TEXTURE,
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CONSTANT = GL_CONSTANT_ARB,
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PRIMARY_COLOR = GL_PRIMARY_COLOR_ARB,
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PREVIOUS = GL_PREVIOUS_ARB
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};
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void setSource0_RGB(SourceParam sp) { _source0_RGB = sp; }
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void setSource1_RGB(SourceParam sp) { _source1_RGB = sp; }
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void setSource2_RGB(SourceParam sp) { _source2_RGB = sp; }
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void setSource0_Alpha(SourceParam sp) { _source0_Alpha = sp; }
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void setSource1_Alpha(SourceParam sp) { _source1_Alpha = sp; }
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void setSource2_Alpha(SourceParam sp) { _source2_Alpha = sp; }
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SourceParam getSource0_RGB() const { return _source0_RGB; }
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SourceParam getSource1_RGB() const { return _source1_RGB; }
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SourceParam getSource2_RGB() const { return _source2_RGB; }
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SourceParam getSource0_Alpha() const { return _source0_Alpha; }
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SourceParam getSource1_Alpha() const { return _source1_Alpha; }
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SourceParam getSource2_Alpha() const { return _source2_Alpha; }
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enum OperandParam
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{
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SRC_COLOR = GL_SRC_COLOR,
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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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ONE_MINUS_SRC_ALPHA = GL_ONE_MINUS_SRC_ALPHA
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};
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void setOperand0_RGB(OperandParam op) { _operand0_RGB = op; }
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void setOperand1_RGB(OperandParam op) { _operand1_RGB = op; }
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void setOperand2_RGB(OperandParam op) { _operand2_RGB = op; }
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void setOperand0_Alpha(OperandParam op) { _operand0_Alpha = op; }
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void setOperand1_Alpha(OperandParam op) { _operand1_Alpha = op; }
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void setOperand2_Alpha(OperandParam op) { _operand2_Alpha = op; }
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OperandParam getOperand0_RGB() const { return _operand0_RGB; }
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OperandParam getOperand1_RGB() const { return _operand1_RGB; }
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OperandParam getOperand2_RGB() const { return _operand2_RGB; }
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OperandParam getOperand0_Alpha() const { return _operand0_Alpha; }
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OperandParam getOperand1_Alpha() const { return _operand1_Alpha; }
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OperandParam getOperand2_Alpha() const { return _operand2_Alpha; }
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void setScale_RGB(float scale) { _scale_RGB = scale; }
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void setScale_Alpha(float scale) { _scale_Alpha = scale; }
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float getScale_RGB() const { return _scale_RGB; }
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float getScale_Alpha() const { return _scale_Alpha; }
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void setConstantColor( const Vec4& color ) { _constantColor = color; }
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const Vec4& getConstantColor() const { return _constantColor; }
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virtual void apply(State& state) const;
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protected :
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virtual ~TexEnvCombine();
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CombineParam _combine_RGB;
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CombineParam _combine_Alpha;
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SourceParam _source0_RGB;
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SourceParam _source1_RGB;
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SourceParam _source2_RGB;
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SourceParam _source0_Alpha;
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SourceParam _source1_Alpha;
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SourceParam _source2_Alpha;
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OperandParam _operand0_RGB;
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OperandParam _operand1_RGB;
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OperandParam _operand2_RGB;
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OperandParam _operand0_Alpha;
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OperandParam _operand1_Alpha;
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OperandParam _operand2_Alpha;
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float _scale_RGB;
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float _scale_Alpha;
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osg::Vec4 _constantColor;
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};
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}
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#endif
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