/usr/include/osg/TexEnvCombine is in libopenscenegraph-dev 3.2.1-6.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 | /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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_TEXENVCOMBINE
#define OSG_TEXENVCOMBINE 1
#include <osg/TexEnv>
#include <osg/Vec3>
#include <osg/Vec4>
// If not defined by gl.h use the definition found in:
// http://oss.sgi.com/projects/ogl-sample/registry/ARB/texture_env_combine.txt
#ifndef GL_ARB_texture_env_combine
#define GL_COMBINE_ARB 0x8570
#define GL_COMBINE_RGB_ARB 0x8571
#define GL_COMBINE_ALPHA_ARB 0x8572
#define GL_SOURCE0_RGB_ARB 0x8580
#define GL_SOURCE1_RGB_ARB 0x8581
#define GL_SOURCE2_RGB_ARB 0x8582
#define GL_SOURCE0_ALPHA_ARB 0x8588
#define GL_SOURCE1_ALPHA_ARB 0x8589
#define GL_SOURCE2_ALPHA_ARB 0x858A
#define GL_OPERAND0_RGB_ARB 0x8590
#define GL_OPERAND1_RGB_ARB 0x8591
#define GL_OPERAND2_RGB_ARB 0x8592
#define GL_OPERAND0_ALPHA_ARB 0x8598
#define GL_OPERAND1_ALPHA_ARB 0x8599
#define GL_OPERAND2_ALPHA_ARB 0x859A
#define GL_RGB_SCALE_ARB 0x8573
#define GL_ADD_SIGNED_ARB 0x8574
#define GL_INTERPOLATE_ARB 0x8575
#define GL_SUBTRACT_ARB 0x84E7
#define GL_CONSTANT_ARB 0x8576
#define GL_PRIMARY_COLOR_ARB 0x8577
#define GL_PREVIOUS_ARB 0x8578
#endif
#ifndef GL_ARB_texture_env_dot3
#define GL_DOT3_RGB_ARB 0x86AE
#define GL_DOT3_RGBA_ARB 0x86AF
#endif
#ifndef GL_TEXTURE0
#define GL_TEXTURE0 0x84C0
#endif
namespace osg {
/** TexEnvCombine encapsulates the OpenGL glTexEnvCombine (texture
* environment) state. */
class OSG_EXPORT TexEnvCombine : public StateAttribute
{
public :
TexEnvCombine();
/** Copy constructor using CopyOp to manage deep vs shallow copy. */
TexEnvCombine(const TexEnvCombine& texenv,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
StateAttribute(texenv,copyop),
_needsTexEnvCrossbar(texenv._needsTexEnvCrossbar),
_combine_RGB(texenv._combine_RGB),
_combine_Alpha(texenv._combine_Alpha),
_source0_RGB(texenv._source0_RGB),
_source1_RGB(texenv._source1_RGB),
_source2_RGB(texenv._source2_RGB),
_source0_Alpha(texenv._source0_Alpha),
_source1_Alpha(texenv._source1_Alpha),
_source2_Alpha(texenv._source2_Alpha),
_operand0_RGB(texenv._operand0_RGB),
_operand1_RGB(texenv._operand1_RGB),
_operand2_RGB(texenv._operand2_RGB),
_operand0_Alpha(texenv._operand0_Alpha),
_operand1_Alpha(texenv._operand1_Alpha),
_operand2_Alpha(texenv._operand2_Alpha),
_scale_RGB(texenv._scale_RGB),
_scale_Alpha(texenv._scale_Alpha),
_constantColor(texenv._constantColor) {}
META_StateAttribute(osg, TexEnvCombine, TEXENV);
virtual bool isTextureAttribute() const { return true; }
/** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
virtual int compare(const StateAttribute& sa) const
{
// Check for equal types, then create the rhs variable
// used by the COMPARE_StateAttribute_parameter macros below.
COMPARE_StateAttribute_Types(TexEnvCombine,sa)
// Compare each parameter in turn against the rhs.
COMPARE_StateAttribute_Parameter(_needsTexEnvCrossbar)
COMPARE_StateAttribute_Parameter(_combine_RGB)
COMPARE_StateAttribute_Parameter(_combine_Alpha)
COMPARE_StateAttribute_Parameter(_source0_RGB)
COMPARE_StateAttribute_Parameter(_source1_RGB)
COMPARE_StateAttribute_Parameter(_source2_RGB)
COMPARE_StateAttribute_Parameter(_source0_Alpha)
COMPARE_StateAttribute_Parameter(_source1_Alpha)
COMPARE_StateAttribute_Parameter(_source2_Alpha)
COMPARE_StateAttribute_Parameter(_operand0_RGB)
COMPARE_StateAttribute_Parameter(_operand1_RGB)
COMPARE_StateAttribute_Parameter(_operand2_RGB)
COMPARE_StateAttribute_Parameter(_operand0_Alpha)
COMPARE_StateAttribute_Parameter(_operand1_Alpha)
COMPARE_StateAttribute_Parameter(_operand2_Alpha)
COMPARE_StateAttribute_Parameter(_scale_RGB)
COMPARE_StateAttribute_Parameter(_scale_Alpha)
COMPARE_StateAttribute_Parameter(_constantColor)
return 0; // Passed all the above comparison macros, so must be equal.
}
enum CombineParam
{
REPLACE = GL_REPLACE,
MODULATE = GL_MODULATE,
ADD = GL_ADD,
ADD_SIGNED = GL_ADD_SIGNED_ARB,
INTERPOLATE = GL_INTERPOLATE_ARB,
SUBTRACT = GL_SUBTRACT_ARB,
DOT3_RGB = GL_DOT3_RGB_ARB,
DOT3_RGBA = GL_DOT3_RGBA_ARB
};
void setCombine_RGB(GLint cm);
void setCombine_Alpha(GLint cm);
GLint getCombine_RGB() const { return _combine_RGB; }
GLint getCombine_Alpha() const { return _combine_Alpha; }
enum SourceParam
{
CONSTANT = GL_CONSTANT_ARB,
PRIMARY_COLOR = GL_PRIMARY_COLOR_ARB,
PREVIOUS = GL_PREVIOUS_ARB,
TEXTURE = GL_TEXTURE,
TEXTURE0 = GL_TEXTURE0,
TEXTURE1 = GL_TEXTURE0+1,
TEXTURE2 = GL_TEXTURE0+2,
TEXTURE3 = GL_TEXTURE0+3,
TEXTURE4 = GL_TEXTURE0+4,
TEXTURE5 = GL_TEXTURE0+5,
TEXTURE6 = GL_TEXTURE0+6,
TEXTURE7 = GL_TEXTURE0+7
};
void setSource0_RGB(GLint sp);
void setSource1_RGB(GLint sp);
void setSource2_RGB(GLint sp);
void setSource0_Alpha(GLint sp);
void setSource1_Alpha(GLint sp);
void setSource2_Alpha(GLint sp);
GLint getSource0_RGB() const { return _source0_RGB; }
GLint getSource1_RGB() const { return _source1_RGB; }
GLint getSource2_RGB() const { return _source2_RGB; }
GLint getSource0_Alpha() const { return _source0_Alpha; }
GLint getSource1_Alpha() const { return _source1_Alpha; }
GLint getSource2_Alpha() const { return _source2_Alpha; }
enum OperandParam
{
SRC_COLOR = GL_SRC_COLOR,
ONE_MINUS_SRC_COLOR = GL_ONE_MINUS_SRC_COLOR,
SRC_ALPHA = GL_SRC_ALPHA,
ONE_MINUS_SRC_ALPHA = GL_ONE_MINUS_SRC_ALPHA
};
void setOperand0_RGB(GLint op);
void setOperand1_RGB(GLint op);
void setOperand2_RGB(GLint op);
void setOperand0_Alpha(GLint op);
void setOperand1_Alpha(GLint op);
void setOperand2_Alpha(GLint op);
GLint getOperand0_RGB() const { return _operand0_RGB; }
GLint getOperand1_RGB() const { return _operand1_RGB; }
GLint getOperand2_RGB() const { return _operand2_RGB; }
GLint getOperand0_Alpha() const { return _operand0_Alpha; }
GLint getOperand1_Alpha() const { return _operand1_Alpha; }
GLint getOperand2_Alpha() const { return _operand2_Alpha; }
void setScale_RGB(float scale);
void setScale_Alpha(float scale);
float getScale_RGB() const { return _scale_RGB; }
float getScale_Alpha() const { return _scale_Alpha; }
void setConstantColor( const Vec4& color ) { _constantColor = color; }
const Vec4& getConstantColor() const { return _constantColor; }
/** Set the constant color attribute to the given light direction
* for use with DOT3 combine operation. */
void setConstantColorAsLightDirection(const Vec3& direction)
{
_constantColor.set((direction.x()+1.0f)*0.5f,(direction.y()+1.0f)*0.5f,(direction.z()+1.0f)*0.5f,1.0f);
}
Vec3 getConstantColorAsLightDirection() const
{
return Vec3(_constantColor.x()*2.0f-1.0f, _constantColor.y()*2.0f-1.0f, _constantColor.z()*2.0f-1.0f);
}
virtual void apply(State& state) const;
protected :
virtual ~TexEnvCombine();
inline bool needsTexEnvCombiner(GLint value) const
{
switch(value)
{
case(CONSTANT):
case(PRIMARY_COLOR):
case(PREVIOUS):
case(TEXTURE):
return false;
}
return true;
}
void computeNeedForTexEnvCombiners()
{
_needsTexEnvCrossbar = (needsTexEnvCombiner(_source0_RGB) ||
needsTexEnvCombiner(_source1_RGB) ||
needsTexEnvCombiner(_source2_RGB) ||
needsTexEnvCombiner(_source0_Alpha) ||
needsTexEnvCombiner(_source1_Alpha) ||
needsTexEnvCombiner(_source2_Alpha));
}
bool _needsTexEnvCrossbar;
GLint _combine_RGB;
GLint _combine_Alpha;
GLint _source0_RGB;
GLint _source1_RGB;
GLint _source2_RGB;
GLint _source0_Alpha;
GLint _source1_Alpha;
GLint _source2_Alpha;
GLint _operand0_RGB;
GLint _operand1_RGB;
GLint _operand2_RGB;
GLint _operand0_Alpha;
GLint _operand1_Alpha;
GLint _operand2_Alpha;
float _scale_RGB;
float _scale_Alpha;
osg::Vec4 _constantColor;
};
}
#endif
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