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6.1. QUERYING GL STATE 492 6.1.17 Transform Feedback Queries The command boolean IsTransformFeedback( uint id ); returns TRUE if id is the name of a transform feedback object. If id is zero, or a non-zero value that is not the name of a transform feedback object, IsTransformFeedback return FALSE. No error is generated if id is not a valid transform feedback object name. 6.1.18 Shader and Program Queries State stored in shader or program objects can be queried by commands that accept shader or program object names. These commands will generate the error INVALID_VALUE if the provided name is not the name of either a shader or program object, and INVALID_OPERATION if the provided name identifies an object of the other type. If an error is generated, variables used to hold return values are not modified. The command boolean IsShader( uint shader ); returns TRUE if shader is the name of a shader object. If shader is zero, or a nonzero value that is not the name of a shader object, IsShader returns FALSE. No error is generated if shader is not a valid shader object name. The command void GetShaderiv( uint shader, enum pname, int *params ); returns properties of the shader object named shader in params. The parameter value to return is specified by pname. If pname is SHADER_TYPE, VERTEX_SHADER, TESS_CONTROL_SHADER, TESS_EVALUATION_SHADER, GEOMETRY_SHADER, or FRAGMENT_SHADER is returned if shader is a vertex, tessellation control, tessellation evaluation, geometry, or fragment shader object respectively. If pname is DELETE_STATUS, TRUE is returned if the shader has been flagged for deletion and FALSE is returned otherwise. If pname is COMPILE_STATUS, TRUE is returned if the shader was last compiled successfully, and FALSE is returned otherwise. If pname is INFO_LOG_LENGTH, the length of the info log, including a null terminator, is returned. If there is no info log, zero is returned. OpenGL 4.2 (Compatibility Profile) - August 22, 2011
6.1. QUERYING GL STATE 493 If pname is SHADER_SOURCE_LENGTH, the length of the concatenation of the source strings making up the shader source, including a null terminator, is returned. If no source has been defined, zero is returned. The command boolean IsProgram( uint program ); returns TRUE if program is the name of a program object. If program is zero, or a non-zero value that is not the name of a program object, IsProgram returns FALSE. No error is generated if program is not a valid program object name. The command void GetProgramiv( uint program, enum pname, int *params ); returns properties of the program object named program in params. The parameter value to return is specified by pname. If pname is DELETE_STATUS, TRUE is returned if the program has been flagged for deletion, and FALSE is returned otherwise. If pname is LINK_STATUS, TRUE is returned if the program was last compiled successfully, and FALSE is returned otherwise. If pname is VALIDATE_STATUS, TRUE is returned if the last call to ValidateProgram with program was successful, and FALSE is returned otherwise. If pname is INFO_LOG_LENGTH, the length of the info log, including a null terminator, is returned. If there is no info log, zero is returned. If pname is ATTACHED_SHADERS, the number of objects attached is returned. If pname is ACTIVE_ATTRIBUTES, the number of active attributes in program is returned. If no active attributes exist, zero is returned. If pname is ACTIVE_ATTRIBUTE_MAX_LENGTH, the length of the longest active attribute name, including a null terminator, is returned. If no active attributes exist, zero is returned. If pname is ACTIVE_UNIFORMS, the number of active uniforms is returned. If no active uniforms exist, zero is returned. If pname is ACTIVE_UNIFORM_MAX_LENGTH, the length of the longest active uniform name, including a null terminator, is returned. If no active uniforms exist, zero is returned. If pname is TRANSFORM_FEEDBACK_BUFFER_MODE, the buffer mode used when transform feedback is active is returned. It can be one of SEPARATE_- ATTRIBS or INTERLEAVED_ATTRIBS. If pname is TRANSFORM_FEEDBACK_VARYINGS, the number of output variables to capture in transform feedback mode for the program is returned. OpenGL 4.2 (Compatibility Profile) - August 22, 2011
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The OpenGL R○ Graphics System: A
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Contents 1 Introduction 1 1.1 Forma
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CONTENTS iii 2.15 Tessellation . .
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CONTENTS v 3.12 Fog . . . . . . . .
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CONTENTS vii A Invariance 579 A.1 R
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CONTENTS ix L Version 4.2 649 L.1 N
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CONTENTS xi M.3.70 BPTC texture com
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LIST OF FIGURES xiii 3.11 Example o
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LIST OF TABLES xv 3.10 UNSIGNED_SHO
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LIST OF TABLES xvii 6.29 Pixel Oper
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Chapter 1 Introduction This documen
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1.5. OUR VIEW 3 available to the us
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Chapter 2 OpenGL Operation 2.1 Open
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2.1. OPENGL FUNDAMENTALS 7 section
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2.1. OPENGL FUNDAMENTALS 9 must not
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2.1. OPENGL FUNDAMENTALS 11 2.1.2 F
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2.3. GL COMMAND SYNTAX 13 describe
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2.3. GL COMMAND SYNTAX 15 indicates
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2.4. BASIC GL OPERATION 17 Display
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2.6. BEGIN/END PARADIGM 19 Table 2.
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2.6. BEGIN/END PARADIGM 21 Vertex C
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2.6. BEGIN/END PARADIGM 23 drawn us
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2.6. BEGIN/END PARADIGM 25 2 4 6 2
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2.6. BEGIN/END PARADIGM 27 Figure 2
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2.6. BEGIN/END PARADIGM 29 Primitiv
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2.7. VERTEX SPECIFICATION 31 to cha
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2.7. VERTEX SPECIFICATION 33 This c
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2.7. VERTEX SPECIFICATION 35 void C
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2.7. VERTEX SPECIFICATION 37 • si
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2.8. VERTEX ARRAYS 39 void VertexAt
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2.8. VERTEX ARRAYS 41 The index par
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2.8. VERTEX ARRAYS 43 void ArrayEle
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2.8. VERTEX ARRAYS 45 and Primitive
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2.8. VERTEX ARRAYS 47 not modified
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2.8. VERTEX ARRAYS 49 if (mode is i
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2.8. VERTEX ARRAYS 51 The command v
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2.8. VERTEX ARRAYS 53 if (no elemen
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2.8. VERTEX ARRAYS 55 format e t e
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2.9. BUFFER OBJECTS 57 Target name
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2.9. BUFFER OBJECTS 59 in the array
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2.9. BUFFER OBJECTS 61 If the GL is
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2.9. BUFFER OBJECTS 63 Name Value B
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2.9. BUFFER OBJECTS 65 Unmapping Bu
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2.9. BUFFER OBJECTS 67 binding corr
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2.11. RECTANGLES 69 void GenVertexA
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2.12. FIXED-FUNCTION VERTEX TRANSFO
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2.13. FIXED-FUNCTION VERTEX LIGHTIN
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2.14. VERTEX SHADERS 93 shader, its
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2.14. VERTEX SHADERS 95 If shader i
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2.14. VERTEX SHADERS 97 • One or
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2.14. VERTEX SHADERS 99 subsequent
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2.14. VERTEX SHADERS 101 Program pi
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2.14. VERTEX SHADERS 103 such a nam
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2.14. VERTEX SHADERS 105 • the in
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2.14. VERTEX SHADERS 107 LINK_STATU
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2.14. VERTEX SHADERS 109 Data type
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2.14. VERTEX SHADERS 111 This comma
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2.14. VERTEX SHADERS 113 the unifor
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2.14. VERTEX SHADERS 115 program is
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2.14. VERTEX SHADERS 117 control, t
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2.14. VERTEX SHADERS 119 active uni
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2.14. VERTEX SHADERS 121 Type Name
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2.14. VERTEX SHADERS 123 OpenGL Sha
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2.14. VERTEX SHADERS 125 For GetAct
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2.14. VERTEX SHADERS 127 The Unifor
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2.14. VERTEX SHADERS 129 void Progr
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2.14. VERTEX SHADERS 131 consecutiv
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2.14. VERTEX SHADERS 133 Uniform Bu
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2.14. VERTEX SHADERS 135 The number
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2.14. VERTEX SHADERS 137 subroutine
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2.14. VERTEX SHADERS 139 gram comma
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2.14. VERTEX SHADERS 141 recorded a
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2.14. VERTEX SHADERS 143 void GetTr
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2.14. VERTEX SHADERS 145 • If the
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2.14. VERTEX SHADERS 147 • the te
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2.14. VERTEX SHADERS 149 • The sa
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2.14. VERTEX SHADERS 151 The built-
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2.14. VERTEX SHADERS 153 results wr
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2.14. VERTEX SHADERS 155 a previous
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2.14. VERTEX SHADERS 157 • TEXTUR
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2.14. VERTEX SHADERS 159 • Data w
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2.15. TESSELLATION 161 • For each
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2.15. TESSELLATION 163 invocation m
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2.15. TESSELLATION 165 • The vari
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2.15. TESSELLATION 167 output varia
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2.15. TESSELLATION 169 Figure 2.13.
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2.15. TESSELLATION 171 Triangle Tes
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2.15. TESSELLATION 173 each triangl
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2.15. TESSELLATION 179 variables th
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2.15. TESSELLATION 181 Additionally
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2.16. GEOMETRY SHADERS 183 executed
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2.16. GEOMETRY SHADERS 185 accessed
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2.16. GEOMETRY SHADERS 187 Geometry
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2.16. GEOMETRY SHADERS 189 declared
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2.16. GEOMETRY SHADERS 191 of a cub
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2.17. COORDINATE TRANSFORMATIONS 19
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2.18. ASYNCHRONOUS QUERIES 195 The
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2.18. ASYNCHRONOUS QUERIES 197 the
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2.20. TRANSFORM FEEDBACK 199 an exi
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2.20. TRANSFORM FEEDBACK 201 BindTr
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2.20. TRANSFORM FEEDBACK 203 object
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2.20. TRANSFORM FEEDBACK 205 • by
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2.22. FLATSHADING 207 When BeginQue
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2.23. PRIMITIVE CLIPPING 209 gl_Bac
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2.23. PRIMITIVE CLIPPING 211 DEPTH_
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2.24. FINAL COLOR PROCESSING 213 2.
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2.25. CURRENT RASTER POSITION 215 R
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Chapter 3 Rasterization Rasterizati
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3.1. DISCARDING PRIMITIVES BEFORE R
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3.3. ANTIALIASING 221 In some imple
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3.4. POINTS 223 rasterization, beca
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3.4. POINTS 225 void PointParameter
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3.4. POINTS 227 6.0 5.0 4.0 3.0 2.0
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3.4. POINTS 229 where size is the p
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¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
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3.5. LINE SEGMENTS 233 Line Stipple
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3.5. LINE SEGMENTS 235 Figure 3.6.
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3.6. POLYGONS 237 3.6.1 Basic Polyg
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3.6. POLYGONS 239 For a polygon wit
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3.6. POLYGONS 241 3.6.5 Depth Offse
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3.7. PIXEL RECTANGLES 243 polygon r
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3.7. PIXEL RECTANGLES 245 3.7.2 The
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3.7. PIXEL RECTANGLES 247 Map Name
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3.7. PIXEL RECTANGLES 249 The color
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3.7. PIXEL RECTANGLES 251 In additi
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3.7. PIXEL RECTANGLES 253 Special f
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3.7. PIXEL RECTANGLES 255 Histogram
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¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡
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3.7. PIXEL RECTANGLES 259 type Para
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3.7. PIXEL RECTANGLES 261 Element S
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3.7. PIXEL RECTANGLES 263 type Para
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3.7. PIXEL RECTANGLES 265 UNSIGNED_
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3.7. PIXEL RECTANGLES 267 FLOAT_32_
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3.7. PIXEL RECTANGLES 269 Conversio
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3.7. PIXEL RECTANGLES 271 For integ
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3.7. PIXEL RECTANGLES 273 Arithmeti
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3.7. PIXEL RECTANGLES 275 The inter
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3.7. PIXEL RECTANGLES 277 Border Mo
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3.7. PIXEL RECTANGLES 279 where C[i
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3.7. PIXEL RECTANGLES 281 B i and A
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¡ ¡ ¡ ¡ ¡ ¡ 3.8. BITMAPS 283
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3.10. TEXTURING 285 not be performe
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3.10. TEXTURING 287 The active text
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3.10. TEXTURING 289 FALSE is return
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3.10. TEXTURING 291 The currently b
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3.10. TEXTURING 293 The selected gr
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3.10. TEXTURING 295 might not suppo
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3.10. TEXTURING 297 exp p = max(−
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3.10. TEXTURING 299 Sized internal
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3.10. TEXTURING 301 Sized Base D S
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3.10. TEXTURING 303 When target is
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3.10. TEXTURING 305 TEXTURE_CUBE_MA
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3.10. TEXTURING 307 1.0 5.0 4 3 t v
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3.10. TEXTURING 309 Subsequent proc
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3.10. TEXTURING 311 components is c
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3.10. TEXTURING 313 result in an IN
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3.10. TEXTURING 315 storage modes c
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3.10. TEXTURING 317 • data points
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3.10. TEXTURING 319 FORMAT, and TEX
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3.10. TEXTURING 321 3.10.7 Buffer T
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3.10. TEXTURING 323 Internal format
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3.10. TEXTURING 325 Texture paramet
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3.10. TEXTURING 327 Major Axis Dire
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3.10. TEXTURING 329 bias texobj is
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3.10. TEXTURING 331 Coordinate Wrap
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3.10. TEXTURING 333 i 0 = wrap(⌊u
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3.10. TEXTURING 335 section 3.10.17
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3.10. TEXTURING 337 otherwise p =
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3.10. TEXTURING 339 level base arra
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3.10. TEXTURING 341 Effects of Samp
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3.10. TEXTURING 343 dimensional, re
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3.10. TEXTURING 345 for (i = 0; i <
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3.10. TEXTURING 347 } width = max(1
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3.10. TEXTURING 349 Texture Base Te
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3.10. TEXTURING 351 If the value of
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3.10. TEXTURING 353 SRCn_RGB OPERAN
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3.10. TEXTURING 355 Texture Compari
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3.10. TEXTURING 357 the second text
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3.10. TEXTURING 359 to image unit u
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3.10. TEXTURING 361 invalid if: •
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3.10. TEXTURING 363 Supported image
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3.10. TEXTURING 365 Texel sizes, co
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3.12. FOG 367 This factor f is comp
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3.13. FRAGMENT SHADERS 369 fragment
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3.13. FRAGMENT SHADERS 371 • Fog
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3.13. FRAGMENT SHADERS 373 version
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3.13. FRAGMENT SHADERS 375 defined
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3.13. FRAGMENT SHADERS 377 Such bin
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Chapter 4 Per-Fragment Operations a
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4.1. PER-FRAGMENT OPERATIONS 381 Fr
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4.1. PER-FRAGMENT OPERATIONS 383 st
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4.1. PER-FRAGMENT OPERATIONS 385 pr
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4.1. PER-FRAGMENT OPERATIONS 387 St
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4.1. PER-FRAGMENT OPERATIONS 389 Be
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4.1. PER-FRAGMENT OPERATIONS 391 dr
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4.1. PER-FRAGMENT OPERATIONS 393 vo
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4.1. PER-FRAGMENT OPERATIONS 395 Th
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4.1. PER-FRAGMENT OPERATIONS 397 to
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4.2. WHOLE FRAMEBUFFER OPERATIONS 3
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¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡
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4.3. DRAWING, READING, AND COPYING
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4.4. FRAMEBUFFER OBJECTS 425 with t
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4.4. FRAMEBUFFER OBJECTS 427 If a f
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4.4. FRAMEBUFFER OBJECTS 429 BindRe
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4.4. FRAMEBUFFER OBJECTS 431 that t
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4.4. FRAMEBUFFER OBJECTS 433 or if
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4.4. FRAMEBUFFER OBJECTS 435 The re
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4.4. FRAMEBUFFER OBJECTS 437 • th
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4.4. FRAMEBUFFER OBJECTS 439 • An
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Page 469 and 470: 5.1. EVALUATORS 449 Integers Reals
Page 471 and 472: 5.1. EVALUATORS 451 The second way
Page 473 and 474: 5.2. SELECTION 453 EvalCoord2(p *
Page 475 and 476: 5.3. FEEDBACK 455 of each primitive
Page 477 and 478: 5.4. TIMER QUERIES 457 Type coordin
Page 479 and 480: 5.5. DISPLAY LISTS 459 started or s
Page 481 and 482: 5.5. DISPLAY LISTS 461 SHORT, UNSIG
Page 483 and 484: 5.5. DISPLAY LISTS 463 Program and
Page 485 and 486: 5.7. SYNC OBJECTS AND FENCES 465 Pr
Page 487 and 488: 5.7. SYNC OBJECTS AND FENCES 467 vo
Page 489 and 490: 5.8. HINTS 469 Target PERSPECTIVE_C
Page 491 and 492: 6.1. QUERYING GL STATE 471 void Get
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Page 497 and 498: 6.1. QUERYING GL STATE 477 • form
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Page 515 and 516: 6.1. QUERYING GL STATE 495 If pname
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Page 519 and 520: 6.1. QUERYING GL STATE 499 command
Page 521 and 522: 6.1. QUERYING GL STATE 501 void Get
Page 523 and 524: 6.1. QUERYING GL STATE 503 • If p
Page 525 and 526: 6.1. QUERYING GL STATE 505 An INVAL
Page 527 and 528: 6.2. STATE TABLES 507 the attribute
Page 529 and 530: 6.2. STATE TABLES 509 Type code Exp
Page 531 and 532: 6.2. STATE TABLES 511 Get value Typ
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6.2. STATE TABLES 543 Get value Typ
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6.2. STATE TABLES 549 Get Command I
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6.2. STATE TABLES 565 Get Command M
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6.2. STATE TABLES 567 Get Command M
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Appendix A Invariance The OpenGL sp
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A.3. INVARIANCE RULES 581 • Sciss
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A.4. TESSELLATION INVARIANCE 583
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A.5. ATOMIC COUNTER INVARIANCE 585
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Appendix B Corollaries The followin
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589 16. ColorMaterial has no effect
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C.1. RGTC COMPRESSED TEXTURE IMAGE
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C.2. BPTC COMPRESSED TEXTURE IMAGE
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Appendix D Shared Objects and Multi
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D.2. SYNC OBJECTS AND MULTIPLE CONT
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D.3. PROPAGATING CHANGES TO OBJECTS
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E.1. CORE AND COMPATIBILITY PROFILE
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E.2. DEPRECATED AND REMOVED FEATURE
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E.2. DEPRECATED AND REMOVED FEATURE
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Appendix F Version 3.0 and Before O
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F.3. CHANGED TOKENS 619 New Token N
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F.5. CREDITS AND ACKNOWLEDGEMENTS 6
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F.5. CREDITS AND ACKNOWLEDGEMENTS 6
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G.2. DEPRECATION MODEL 625 state ha
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G.4. CREDITS AND ACKNOWLEDGEMENTS 6
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Appendix H Version 3.2 OpenGL versi
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H.4. CHANGE LOG 631 New Token Name
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H.5. CREDITS AND ACKNOWLEDGEMENTS 6
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H.5. CREDITS AND ACKNOWLEDGEMENTS 6
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I.2. DEPRECATION MODEL 637 ing fact
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I.4. CREDITS AND ACKNOWLEDGEMENTS 6
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J.1. NEW FEATURES 641 • Mechanism
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J.4. CREDITS AND ACKNOWLEDGEMENTS 6
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Appendix K Version 4.1 OpenGL versi
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K.5. CREDITS AND ACKNOWLEDGEMENTS 6
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Appendix L Version 4.2 OpenGL versi
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L.5. CREDITS AND ACKNOWLEDGEMENTS 6
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Appendix M Extension Registry, Head
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M.3. ARB EXTENSIONS 655 M.3.2 be am
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M.3. ARB EXTENSIONS 657 M.3.13 Text
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M.3. ARB EXTENSIONS 659 M.3.28 Open
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M.3. ARB EXTENSIONS 661 The name st
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M.3. ARB EXTENSIONS 663 equivalent
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M.3. ARB EXTENSIONS 665 M.3.59 Seam
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M.3. ARB EXTENSIONS 667 The name st
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M.3. ARB EXTENSIONS 669 M.3.84 Tess
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M.3. ARB EXTENSIONS 671 M.3.97 Cont
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M.3. ARB EXTENSIONS 673 M.3.109 Tex
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INDEX 675 552 ACTIVE UNIFORM BLOCKS
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INDEX 677 BindSampler, 290, 292 Bin
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INDEX 679 COLOR TABLE BIAS, 248, 24
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INDEX 681 CreateProgram, 96, 463 Cr
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INDEX 683 DrawArraysInstanced, 48,
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INDEX 685 Flush, 463, 464, 468, 587
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INDEX 687 GetActiveAtomicCounterBuf
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INDEX 689 GetVertexAttribdv, 498, 4
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INDEX 691 GL ARB viewport array, 64
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INDEX 693 IMAGE 2D RECT, 123 IMAGE
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INDEX 695 512-514, 516, 518-525, 53
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INDEX 697 MapGrid1, 451 MapGrid2, 4
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INDEX 699 MAX SERVER WAIT TIMEOUT,
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INDEX 701 MultTransposeMatrix, 72,
Page 723 and 724:
INDEX 703 POINT SIZE GRANULARITY, 5
Page 725 and 726:
INDEX 705 Q, 78, 79, 473 QUAD STRIP
Page 727 and 728:
INDEX 707 rgb10 a2ui, 362 RGB12, 29
Page 729 and 730:
INDEX 709 SecondaryColor3, 34 Secon
Page 731 and 732:
INDEX 711 TexCoord*1*, 33 TexCoord*
Page 733 and 734:
INDEX 713 526 TEXTURE CUBE MAP POS-
Page 735 and 736:
INDEX 715 triangles adjacency, 184
Page 737 and 738:
INDEX 717 417 UNSIGNED INT 8 8 8 8,
Page 739:
INDEX 719 VertexAttribI3i, 109 Vert
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spec - OpenGL

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