OpenGL 4.2 (Compatibility Profile) - April 27, 2012

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5.4. TIMER QUERIES 462 Type coordinates color texture total values 2D x, y – – 2 3D x, y, z – – 3 3D_COLOR x, y, z k – 3 + k 3D_COLOR_TEXTURE x, y, z k 4 7 + k 4D_COLOR_TEXTURE x, y, z, w k 4 8 + k Table 5.2: Correspondence of feedback type to number of values per vertex. k is 1 in color index mode and 4 in RGBA mode. which the overflow flag is reset. While in feedback mode, values are not guaranteed to be written into the feedback buffer before RenderMode is called. Figure 5.2 gives a grammar for the array produced by feedback. Each primitive is indicated with a unique identifying value followed by some number of vertices. A vertex is fed back as some number of floating-point values determined by the feedback type. Table 5.2 gives the correspondence between type and the number of values returned for each vertex. The command void PassThrough( float token ); may be used as a marker in feedback mode. token is returned as if it were a primitive; it is indicated with its own unique identifying value. The ordering of any PassThrough commands with respect to primitive specification is maintained by feedback. PassThrough may not occur between Begin and End. It has no effect when the GL is not in feedback mode. The state required for feedback is the pointer to the feedback array, the maximum number of values that may be placed there, and the feedback type. An overflow flag is required to indicate whether the maximum allowable number of feedback values has been written; initially this flag is cleared. These state variables are GL client state. Feedback also relies on the same mode flag as selection to indicate whether the GL is in feedback, selection, or normal rendering mode. 5.4 Timer Queries Timer queries use query objects to track the amount of time needed to fully complete a set of GL commands, or to determine the current time of the GL. When BeginQuery and EndQuery are called with a target of TIME_ELAPSED, the GL prepares to start and stop the timer used for timer queries. The timer is OpenGL 4.2 (Compatibility Profile) - April 27, 2012
5.4. TIMER QUERIES 463 feedback-list: feedback-item feedback-list feedback-item feedback-item: point line-segment polygon bitmap pixel-rectangle passthrough point: POINT_TOKEN vertex line-segment: LINE_TOKEN vertex vertex LINE_RESET_TOKEN vertex vertex polygon: POLYGON_TOKEN n polygon-spec polygon-spec: polygon-spec vertex vertex vertex vertex bitmap: BITMAP_TOKEN vertex pixel-rectangle: DRAW_PIXEL_TOKEN vertex COPY_PIXEL_TOKEN vertex passthrough: PASS_THROUGH_TOKEN f vertex: 2D: f f 3D: f f f 3D_COLOR: f f f color 3D_COLOR_TEXTURE: f f f color tex 4D_COLOR_TEXTURE: f f f f color tex color: tex: f f f f f f f f f Figure 5.2: Feedback syntax. f is a floating-point number. n is a floating-point integer giving the number of vertices in a polygon. The symbols ending with _TOKEN are symbolic floating-point constants. The labels under the “vertex” rule show the different data returned for vertices depending on the feedback type. LINE_TOKEN and LINE_RESET_TOKEN are identical except that the latter is returned only when the line stipple is reset for that line segment. OpenGL 4.2 (Compatibility Profile) - April 27, 2012
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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 2.14.14 Required State
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CONTENTS v 3.11 Color Sum . . . . .
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CONTENTS vii A Invariance 588 A.1 R
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CONTENTS ix L Version 4.2 659 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 the CPU and the gra
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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 Transfor
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2.6. BEGIN/END PARADIGM 19 To allow
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2.6. BEGIN/END PARADIGM 21 Vertex C
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2.6. BEGIN/END PARADIGM 23 2.6.1 Be
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2.6. BEGIN/END PARADIGM 25 vertex A
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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 that i
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2.7. VERTEX SPECIFICATION 33 The Te
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2.7. VERTEX SPECIFICATION 35 The Co
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2.7. VERTEX SPECIFICATION 37 When v
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2.8. VERTEX ARRAYS 39 indicates the
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2.8. VERTEX ARRAYS 41 integer value
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2.8. VERTEX ARRAYS 43 does not exis
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2.8. VERTEX ARRAYS 45 and void Enab
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2.8. VERTEX ARRAYS 47 array is enab
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2.8. VERTEX ARRAYS 49 if (mode or p
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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 Each target
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2.9. BUFFER OBJECTS 61 Name Value B
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2.9. BUFFER OBJECTS 63 Name Value B
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2.9. BUFFER OBJECTS 65 FlushMappedB
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2.9. BUFFER OBJECTS 67 that GL impl
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2.10. VERTEX ARRAY OBJECTS 69 2.10
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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 any stage.
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2.14. VERTEX SHADERS 101 2.14.4 Pro
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2.14. VERTEX SHADERS 103 been previ
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2.14. VERTEX SHADERS 105 • For ea
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2.14. VERTEX SHADERS 107 • Six un
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2.14. VERTEX SHADERS 109 gram execu
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2.14. VERTEX SHADERS 111 values are
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2.14. VERTEX SHADERS 113 Built-in a
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2.14. VERTEX SHADERS 115 When a pro
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2.14. VERTEX SHADERS 117 void GetAc
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2.14. VERTEX SHADERS 119 bufferInde
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2.14. VERTEX SHADERS 121 program is
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2.14. VERTEX SHADERS 123 OpenGL Sha
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2.14. VERTEX SHADERS 125 OpenGL Sha
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2.14. VERTEX SHADERS 127 ments in t
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2.14. VERTEX SHADERS 129 The Unifor
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2.14. VERTEX SHADERS 131 void Progr
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2.14. VERTEX SHADERS 133 • Arrays
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2.14. VERTEX SHADERS 135 with targe
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2.14. VERTEX SHADERS 137 Each of a
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2.14. VERTEX SHADERS 139 is returne
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2.14. VERTEX SHADERS 141 2.14.10 Im
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2.14. VERTEX SHADERS 143 void Trans
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2.14. VERTEX SHADERS 145 INVALID_OP
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2.14. VERTEX SHADERS 147 The follow
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2.14. VERTEX SHADERS 149 Texture Si
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2.14. VERTEX SHADERS 151 dent const
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2.14. VERTEX SHADERS 153 as describ
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2.14. VERTEX SHADERS 155 Separable
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2.14. VERTEX SHADERS 157 invocation
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2.14. VERTEX SHADERS 159 • COMMAN
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2.14. VERTEX SHADERS 161 • Data w
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2.15. TESSELLATION 163 2.15 Tessell
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2.15. TESSELLATION 165 Tessellation
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2.15. TESSELLATION 167 Similarly to
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2.15. TESSELLATION 169 nent count.
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2.15. TESSELLATION 171 Figure 2.13.
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2.15. TESSELLATION 173 along each t
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2.15. TESSELLATION 175 ermost inner
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2.15. TESSELLATION 181 variables th
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2.15. TESSELLATION 183 Additionally
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2.16. GEOMETRY SHADERS 185 executed
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2.16. GEOMETRY SHADERS 187 forms an
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2.16. GEOMETRY SHADERS 189 subseque
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2.16. GEOMETRY SHADERS 191 The Open
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2.16. GEOMETRY SHADERS 193 rays. Th
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2.17. COORDINATE TRANSFORMATIONS 19
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2.18. ASYNCHRONOUS QUERIES 197 The
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2.18. ASYNCHRONOUS QUERIES 199 the
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2.20. TRANSFORM FEEDBACK 201 the GL
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2.20. TRANSFORM FEEDBACK 203 object
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2.20. TRANSFORM FEEDBACK 205 the ge
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2.20. TRANSFORM FEEDBACK 207 and th
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2.22. FLATSHADING 209 stream index
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2.23. PRIMITIVE CLIPPING 211 void S
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2.23. PRIMITIVE CLIPPING 213 If the
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2.25. CURRENT RASTER POSITION 215 I
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2.25. CURRENT RASTER POSITION 217 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 223 3. The sum of
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3.4. POINTS 225 any other variables
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3.4. POINTS 227 and the fade factor
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¡ ¡ ¡ ¡ ¡ ¡ 3.4. POINTS 229 5
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3.4. POINTS 231 All fragments produ
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3.5. LINE SEGMENTS 233 3.5 Line Seg
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3.5. LINE SEGMENTS 235 top or both
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3.5. LINE SEGMENTS 237 width = 2 wi
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3.6. POLYGONS 239 In addition, duri
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3.6. POLYGONS 241 such a case we re
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3.6. POLYGONS 243 3.6.3 Antialiasin
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3.6. POLYGONS 245 The offset value
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3.7. PIXEL RECTANGLES 247 Parameter
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3.7. PIXEL RECTANGLES 249 Parameter
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3.7. PIXEL RECTANGLES 251 Table Nam
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3.7. PIXEL RECTANGLES 253 width are
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3.7. PIXEL RECTANGLES 255 The red,
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3.7. PIXEL RECTANGLES 257 meanings,
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3.7. PIXEL RECTANGLES 259 the flag.
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3.7. PIXEL RECTANGLES 261 width and
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3.7. PIXEL RECTANGLES 263 Format Na
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3.7. PIXEL RECTANGLES 265 ROW_LENGT
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3.7. PIXEL RECTANGLES 267 UNSIGNED_
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3.7. PIXEL RECTANGLES 269 UNSIGNED_
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3.7. PIXEL RECTANGLES 271 Format Fi
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3.7. PIXEL RECTANGLES 273 void Draw
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3.7. PIXEL RECTANGLES 275 A fragmen
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3.7. PIXEL RECTANGLES 277 Base Inte
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3.7. PIXEL RECTANGLES 279 Base Filt
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3.7. PIXEL RECTANGLES 281 and C c i
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3.7. PIXEL RECTANGLES 283 ALPHA_BIA
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3.8. BITMAPS 285 ignored.) If a par
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3.9. EARLY PER-FRAGMENT TESTS 287 B
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3.10. TEXTURING 289 cube map array
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3.10. TEXTURING 291 returns n previ
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3.10. TEXTURING 293 3.10.2 Sampler
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3.10. TEXTURING 295 An INVALID_ENUM
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3.10. TEXTURING 297 Base Internal F
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3.10. TEXTURING 299 RGB10_A2UI, RGB
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3.10. TEXTURING 301 Sized internal
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3.10. TEXTURING 303 Sized Base A L
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3.10. TEXTURING 305 Compressed Inte
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3.10. TEXTURING 307 for image array
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3.10. TEXTURING 309 When target is
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3.10. TEXTURING 311 3.10.4 Alternat
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3.10. TEXTURING 313 The target argu
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3.10. TEXTURING 315 Counting from z
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3.10. TEXTURING 317 define one-, tw
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3.10. TEXTURING 319 • a, the valu
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3.10. TEXTURING 321 If the target p
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3.10. TEXTURING 323 void TexImage2D
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3.10. TEXTURING 325 When a buffer t
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3.10. TEXTURING 327 void TexParamet
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3.10. TEXTURING 329 Texture paramet
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3.10. TEXTURING 331 When seamless c
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3.10. TEXTURING 333 for a two-dimen
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3.10. TEXTURING 335 and the value r
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3.10. TEXTURING 337 where τ ij is
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3.10. TEXTURING 339 -or- The value
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3.10. TEXTURING 341 The rules for N
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3.10. TEXTURING 343 definition of c
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3.10. TEXTURING 345 height (two- an
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3.10. TEXTURING 347 There is no ima
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3.10. TEXTURING 349 for (i = 0; i <
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3.10. TEXTURING 351 3.10.17 Texture
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3.10. TEXTURING 353 Texture Base Te
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3.10. TEXTURING 355 COMBINE_RGB Tex
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3.10. TEXTURING 357 is 0.0. 3.10.18
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3.10. TEXTURING 359 ferior to conve
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3.10. TEXTURING 361 C f CT 0 CT 1 T
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3.10. TEXTURING 363 ⌊ ⌋ layeror
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3.10. TEXTURING 365 • the type of
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3.10. TEXTURING 367 Supported image
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3.11. COLOR SUM 369 Texel sizes, co
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3.13. FRAGMENT SHADERS 371 f is use
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3.13. FRAGMENT SHADERS 373 The Open
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3.13. FRAGMENT SHADERS 375 • The
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3.13. FRAGMENT SHADERS 377 is defin
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3.13. FRAGMENT SHADERS 379 per-frag
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3.14. ANTIALIASING APPLICATION 381
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Chapter 4 Per-Fragment Operations a
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4.1. PER-FRAGMENT OPERATIONS 385 Fr
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4.1. PER-FRAGMENT OPERATIONS 387 st
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4.1. PER-FRAGMENT OPERATIONS 389 pr
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4.1. PER-FRAGMENT OPERATIONS 391 po
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4.1. PER-FRAGMENT OPERATIONS 393 4.
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4.1. PER-FRAGMENT OPERATIONS 395 th
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4.1. PER-FRAGMENT OPERATIONS 397 or
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4.1. PER-FRAGMENT OPERATIONS 399 Ge
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4.1. PER-FRAGMENT OPERATIONS 401 4.
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4.1. PER-FRAGMENT OPERATIONS 403 ab
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4.2. WHOLE FRAMEBUFFER OPERATIONS 4
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Page 431 and 432: 4.2. WHOLE FRAMEBUFFER OPERATIONS 4
Page 433 and 434: 4.2. WHOLE FRAMEBUFFER OPERATIONS 4
Page 435 and 436: 4.3. DRAWING, READING, AND COPYING
Page 449 and 450: 4.4. FRAMEBUFFER OBJECTS 429 4.4.1
Page 451 and 452: 4.4. FRAMEBUFFER OBJECTS 431 • If
Page 453 and 454: 4.4. FRAMEBUFFER OBJECTS 433 with t
Page 455 and 456: 4.4. FRAMEBUFFER OBJECTS 435 Sized
Page 457 and 458: 4.4. FRAMEBUFFER OBJECTS 437 Attach
Page 459 and 460: 4.4. FRAMEBUFFER OBJECTS 439 operat
Page 461 and 462: 4.4. FRAMEBUFFER OBJECTS 441 Render
Page 463 and 464: 4.4. FRAMEBUFFER OBJECTS 443 4.4.4
Page 465 and 466: 4.4. FRAMEBUFFER OBJECTS 445 • Th
Page 467 and 468: 4.4. FRAMEBUFFER OBJECTS 447 Otherw
Page 469 and 470: 4.4. FRAMEBUFFER OBJECTS 449 corres
Page 471 and 472: 4.4. FRAMEBUFFER OBJECTS 451 When c
Page 473 and 474: 5.1. EVALUATORS 453 target k Values
Page 475 and 476: 5.1. EVALUATORS 455 void EvalCoord{
Page 477 and 478: 5.1. EVALUATORS 457 for i = q 1 to
Page 479 and 480: 5.2. SELECTION 459 LoadName replace
Page 481: 5.3. FEEDBACK 461 buffer is a point
Page 485 and 486: 5.5. DISPLAY LISTS 465 pointers whi
Page 487 and 488: 5.5. DISPLAY LISTS 467 the effect o
Page 489 and 490: 5.6. FLUSH AND FINISH 469 setting;
Page 491 and 492: 5.7. SYNC OBJECTS AND FENCES 471 vo
Page 493 and 494: 5.8. HINTS 473 See appendix D.2 for
Page 495 and 496: Chapter 6 State and State Requests
Page 497 and 498: 6.1. QUERYING GL STATE 477 that mas
Page 499 and 500: 6.1. QUERYING GL STATE 479 data is
Page 501 and 502: 6.1. QUERYING GL STATE 481 turned s
Page 503 and 504: 6.1. QUERYING GL STATE 483 Base Int
Page 505 and 506: 6.1. QUERYING GL STATE 485 INVALID_
Page 507 and 508: 6.1. QUERYING GL STATE 487 type Nam
Page 509 and 510: 6.1. QUERYING GL STATE 489 If reset
Page 511 and 512: 6.1. QUERYING GL STATE 491 Value CO
Page 513 and 514: 6.1. QUERYING GL STATE 493 For occl
Page 515 and 516: 6.1. QUERYING GL STATE 495 returns
Page 517 and 518: 6.1. QUERYING GL STATE 497 COUNTER_
Page 519 and 520: 6.1. QUERYING GL STATE 499 If pname
Page 523 and 524: 6.1. QUERYING GL STATE 503 of this
Page 525 and 526: 6.1. QUERYING GL STATE 505 void Get
Page 527 and 528: 6.1. QUERYING GL STATE 507 generate
Page 531 and 532: 6.1. QUERYING GL STATE 511 take a b
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6.2. STATE TABLES 513 state variabl
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6.2. STATE TABLES 515 OLD NEW Get v
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6.2. STATE TABLES 517 Get value Typ
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6.2. STATE TABLES 525 Get Command I
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6.2. STATE TABLES 547 Get Command I
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6.2. STATE TABLES 573 Get Command M
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A.2. MULTI-PASS ALGORITHMS 589 A.2
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A.3. INVARIANCE RULES 591 Rule 3 Th
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A.4. TESSELLATION INVARIANCE 593 if
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A.6. WHAT ALL THIS MEANS 595 Becaus
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597 stencil comparison function; it
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Appendix C Compressed Texture Image
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C.1. RGTC COMPRESSED TEXTURE IMAGE
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C.2. BPTC COMPRESSED TEXTURE IMAGE
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D.1. OBJECT DELETION BEHAVIOR 615 m
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D.3. PROPAGATING CHANGES TO OBJECTS
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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 629 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 635 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 641 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 647 ing fact
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I.4. CREDITS AND ACKNOWLEDGEMENTS 6
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J.1. NEW FEATURES 651 • 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.4. CHANGE LOG 661 New Token Name
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L.4. CHANGE LOG 663 GetActiveUnifor
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L.4. CHANGE LOG 665 • Clean up de
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L.4. CHANGE LOG 667 • Minor bugfi
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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 673 M.3.2 be am
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M.3. ARB EXTENSIONS 675 M.3.13 Text
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M.3. ARB EXTENSIONS 677 M.3.28 Open
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M.3. ARB EXTENSIONS 679 The name st
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M.3. ARB EXTENSIONS 681 equivalent
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M.3. ARB EXTENSIONS 683 M.3.59 Seam
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M.3. ARB EXTENSIONS 685 M.3.70 BPTC
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M.3. ARB EXTENSIONS 687 M.3.83 Shad
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M.3. ARB EXTENSIONS 689 M.3.96 Debu
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M.3. ARB EXTENSIONS 691 M.3.108 Sha
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INDEX 693 BUFFERS, 500 ActiveShader
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INDEX 695 BLEND, 351, 354, 394, 400
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INDEX 697 COLOR MATERIAL, 87, 90, 5
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INDEX 699 CopyConvolutionFilter*, 4
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INDEX 701 DOUBLE VEC3, 123 DOUBLE V
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INDEX 703 FLOAT, 39, 44, 54-56, 122
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INDEX 705 GenSamplers, 293-295, 467
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INDEX 707 GetTexLevelParameter, 479
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INDEX 709 GL ARB texture swizzle, 6
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INDEX 711 iimage2DArray, 126 iimage
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INDEX 713 313-315, 317, 318, 321, 3
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INDEX 715 MAP1 TEXTURE COORD 3, 453
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INDEX 717 MAX GEOMETRY UNIFORM - BL
Page 739 and 740:
INDEX 719 GATHER OFFSET, 333, 577 M
Page 741 and 742:
INDEX 721 PIXEL MAP B TO B, 250, 27
Page 743 and 744:
INDEX 723 PROXY POST COLOR MATRIX -
Page 745 and 746:
INDEX 725 rg16 snorm, 366 RG16F, 29
Page 747 and 748:
INDEX 727 SamplerParameterI{i ui}v,
Page 749 and 750:
INDEX 729 T, 78, 478 T2F C3F V3F, 5
Page 751 and 752:
INDEX 731 TEXTURE COORD ARRAY - POI
Page 753 and 754:
INDEX 733 PAUSED, 565, 661, 662 TRA
Page 755 and 756:
INDEX 735 UNPACK SKIP PIXELS, 247,
Page 757 and 758:
INDEX 737 VERTEX ATTRIB ARRAY NOR-
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OpenGL 4.2 (Compatibility Profile) - April 27, 2012

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