OpenGL 4.2 (Compatibility Profile) - April 27, 2012

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M.3. ARB EXTENSIONS 680 The name string for geometry shaders is GL_ARB_geometry_shader4. was promoted to a core feature in OpenGL 3.2. It M.3.43 Half-Precision Vertex Data The name string for half-precision vertex data GL_ARB_half_float_vertex. This extension is equivalent to new core functionality introduced in OpenGL 3.0, based on the earlier GL_NV_half_float extension, and is provided to enable this functionality in older drivers. M.3.44 Instanced Rendering This instanced rendering interface is a less-capable form of GL_ARB_draw_- instanced which can be supported on older hardware. The name string for instanced rendering is GL_ARB_instanced_arrays. It was promoted to a core feature in OpenGL 3.3. M.3.45 Flexible Buffer Mapping The name string for flexible buffer mapping is GL_ARB_map_buffer_range. This extension is equivalent to new core functionality introduced in OpenGL 3.0, based on the earlier GL_APPLE_flush_buffer_range extension, and is provided to enable this functionality in older drivers. M.3.46 Texture Buffer Objects The name string for texture buffer objects is GL_ARB_texture_buffer_- object. It was promoted to a core feature in OpenGL 3.1. M.3.47 RGTC Texture Compression Formats The name string for RGTC texture compression formats is GL_ARB_texture_- compression_rgtc. This extension is equivalent to new core functionality introduced in OpenGL 3.0, based on the earlier GL_EXT_texture_compression_- rgtc extension, and is provided to enable this functionality in older drivers. It was promoted to a core feature in OpenGL 3.0. M.3.48 One- and Two-Component Texture Formats The name string for one- and two-component texture formats is GL_ARB_- texture_rg. It was promoted to a core feature in OpenGL 3.0. This extension is OpenGL 4.2 (Compatibility Profile) - April 27, 2012
M.3. ARB EXTENSIONS 681 equivalent to new core functionality introduced in OpenGL 3.0, and is provided to enable this functionality in older drivers. M.3.49 Vertex Array Objects The name string for vertex array objects is GL_ARB_vertex_array_object. This extension is equivalent to new core functionality introduced in OpenGL 3.0, based on the earlier GL_APPLE_vertex_array_object extension, and is provided to enable this functionality in older drivers. It was promoted to a core feature in OpenGL 3.0. M.3.50 Versioned Context Creation Starting with OpenGL 3.0, a new context creation interface is required in the window system integration layer. This interface specifies the context version required as well as other attributes of the context. The name strings for the GLX and WGL context creation interfaces are GLX_- ARB_create_context and WGL_ARB_create_context respectively. M.3.51 Uniform Buffer Objects The name string for uniform buffer objects is GL_ARB_uniform_buffer_- object. This extension is equivalent to new core functionality introduced in OpenGL 3.1 and is provided to enable this functionality in older drivers. M.3.52 Restoration of features removed from OpenGL 3.0 OpenGL 3.1 removes a large number of features that were marked deprecated in OpenGL 3.0 (see appendix G.2). GL implementations needing to maintain these features to support existing applications may do so, following the deprecation model, by exporting an extension string indicating those features are present. Applications written for OpenGL 3.1 should not depend on any of the features corresponding to this extension, since they will not be available on all platforms with 3.1 implementations. The name string for restoration of features deprecated by OpenGL 3.0 is GL_- ARB_compatibility. The profile terminology introduced with OpenGL 3.2 eliminates the necessity for evolving this extension. Instead, interactions between features removed by OpenGL 3.1 and new features introduced in later OpenGL versions are defined by the compatibility profile corresponding to those versions. 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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4.3. DRAWING, READING, AND COPYING
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4.4. FRAMEBUFFER OBJECTS 429 4.4.1
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4.4. FRAMEBUFFER OBJECTS 431 • If
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4.4. FRAMEBUFFER OBJECTS 433 with t
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4.4. FRAMEBUFFER OBJECTS 435 Sized
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4.4. FRAMEBUFFER OBJECTS 437 Attach
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4.4. FRAMEBUFFER OBJECTS 439 operat
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4.4. FRAMEBUFFER OBJECTS 441 Render
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4.4. FRAMEBUFFER OBJECTS 443 4.4.4
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4.4. FRAMEBUFFER OBJECTS 445 • Th
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4.4. FRAMEBUFFER OBJECTS 447 Otherw
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4.4. FRAMEBUFFER OBJECTS 449 corres
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4.4. FRAMEBUFFER OBJECTS 451 When c
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5.1. EVALUATORS 453 target k Values
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5.1. EVALUATORS 455 void EvalCoord{
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5.1. EVALUATORS 457 for i = q 1 to
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5.2. SELECTION 459 LoadName replace
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5.3. FEEDBACK 461 buffer is a point
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5.4. TIMER QUERIES 463 feedback-lis
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5.5. DISPLAY LISTS 465 pointers whi
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5.5. DISPLAY LISTS 467 the effect o
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5.6. FLUSH AND FINISH 469 setting;
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5.7. SYNC OBJECTS AND FENCES 471 vo
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5.8. HINTS 473 See appendix D.2 for
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Chapter 6 State and State Requests
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6.1. QUERYING GL STATE 477 that mas
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6.1. QUERYING GL STATE 479 data is
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6.1. QUERYING GL STATE 481 turned s
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6.1. QUERYING GL STATE 483 Base Int
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6.1. QUERYING GL STATE 485 INVALID_
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6.1. QUERYING GL STATE 487 type Nam
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6.1. QUERYING GL STATE 489 If reset
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6.1. QUERYING GL STATE 491 Value CO
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6.1. QUERYING GL STATE 493 For occl
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6.1. QUERYING GL STATE 495 returns
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6.1. QUERYING GL STATE 497 COUNTER_
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6.1. QUERYING GL STATE 499 If pname
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6.1. QUERYING GL STATE 503 of this
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6.1. QUERYING GL STATE 505 void Get
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6.1. QUERYING GL STATE 507 generate
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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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Page 651 and 652: F.5. CREDITS AND ACKNOWLEDGEMENTS 6
Page 653 and 654: F.5. CREDITS AND ACKNOWLEDGEMENTS 6
Page 655 and 656: G.2. DEPRECATION MODEL 635 state ha
Page 657 and 658: G.4. CREDITS AND ACKNOWLEDGEMENTS 6
Page 659 and 660: Appendix H Version 3.2 OpenGL versi
Page 661 and 662: H.4. CHANGE LOG 641 New Token Name
Page 663 and 664: H.5. CREDITS AND ACKNOWLEDGEMENTS 6
Page 665 and 666: H.5. CREDITS AND ACKNOWLEDGEMENTS 6
Page 667 and 668: I.2. DEPRECATION MODEL 647 ing fact
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Page 671 and 672: J.1. NEW FEATURES 651 • Mechanism
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Page 675 and 676: Appendix K Version 4.1 OpenGL versi
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Page 679 and 680: Appendix L Version 4.2 OpenGL versi
Page 681 and 682: L.4. CHANGE LOG 661 New Token Name
Page 683 and 684: L.4. CHANGE LOG 663 GetActiveUnifor
Page 685 and 686: L.4. CHANGE LOG 665 • Clean up de
Page 687 and 688: L.4. CHANGE LOG 667 • Minor bugfi
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Page 691 and 692: Appendix M Extension Registry, Head
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Page 695 and 696: M.3. ARB EXTENSIONS 675 M.3.13 Text
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Page 699: M.3. ARB EXTENSIONS 679 The name st
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Page 709 and 710: M.3. ARB EXTENSIONS 689 M.3.96 Debu
Page 711 and 712: M.3. ARB EXTENSIONS 691 M.3.108 Sha
Page 713 and 714: INDEX 693 BUFFERS, 500 ActiveShader
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Page 717 and 718: INDEX 697 COLOR MATERIAL, 87, 90, 5
Page 719 and 720: INDEX 699 CopyConvolutionFilter*, 4
Page 721 and 722: INDEX 701 DOUBLE VEC3, 123 DOUBLE V
Page 723 and 724: INDEX 703 FLOAT, 39, 44, 54-56, 122
Page 725 and 726: INDEX 705 GenSamplers, 293-295, 467
Page 727 and 728: INDEX 707 GetTexLevelParameter, 479
Page 729 and 730: INDEX 709 GL ARB texture swizzle, 6
Page 731 and 732: INDEX 711 iimage2DArray, 126 iimage
Page 733 and 734: INDEX 713 313-315, 317, 318, 321, 3
Page 735 and 736: INDEX 715 MAP1 TEXTURE COORD 3, 453
Page 737 and 738: 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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