1GLGET(3G) [FIXME: manual] GLGET(3G)
2
6 glGet - return the value or values of a selected parameter
7
9 void glGetBooleanv(GLenum pname, GLboolean * data);
10 void glGetDoublev(GLenum pname, GLdouble * data);
12 void glGetFloatv(GLenum pname, GLfloat * data);
14 void glGetIntegerv(GLenum pname, GLint * data);
16 void glGetInteger64v(GLenum pname, GLint64 * data);
18 void glGetBooleani_v(GLenum target, GLuint index, GLboolean * data);
20 void glGetIntegeri_v(GLenum target, GLuint index, GLint * data);
22 void glGetFloati_v(GLenum target, GLuint index, GLfloat * data);
24 void glGetDoublei_v(GLenum target, GLuint index, GLdouble * data);
26 void glGetInteger64i_v(GLenum target, GLuint index, GLint64 * data);
28
30 pname
31 Specifies the parameter value to be returned for non-indexed
32 versions of glGet. The symbolic constants in the list below are
33 accepted.
34 target
36 Specifies the parameter value to be returned for indexed versions
37 of glGet. The symbolic constants in the list below are accepted.
38 index
40 Specifies the index of the particular element being queried.
41 data
43 Returns the value or values of the specified parameter.
44
46 These commands return values for simple state variables in GL. pname
47 is a symbolic constant indicating the state variable to be returned,
48 and data is a pointer to an array of the indicated type in which to
49 place the returned data.
50 Type conversion is performed if data has a different type than the
52 state variable value being requested. If glGetBooleanv is called, a
53 floating-point (or integer) value is converted to GL_FALSE if and only
54 if it is 0.0 (or 0). Otherwise, it is converted to GL_TRUE. If
55 glGetIntegerv is called, boolean values are returned as GL_TRUE or
56 GL_FALSE, and most floating-point values are rounded to the nearest
57 integer value. Floating-point colors and normals, however, are returned
58 with a linear mapping that maps 1.0 to the most positive representable
59 integer value and -1.0 to the most negative representable integer
60 value. If glGetFloatv or glGetDoublev is called, boolean values are
61 returned as GL_TRUE or GL_FALSE, and integer values are converted to
62 floating-point values.
63 The following symbolic constants are accepted by pname:
65 GL_ACTIVE_TEXTURE
67 data returns a single value indicating the active multitexture
68 unit. The initial value is GL_TEXTURE0. See glActiveTexture().
69 GL_ALIASED_LINE_WIDTH_RANGE
71 data returns a pair of values indicating the range of widths
72 supported for aliased lines. See glLineWidth().
73 GL_ARRAY_BUFFER_BINDING
75 data returns a single value, the name of the buffer object
76 currently bound to the target GL_ARRAY_BUFFER. If no buffer object
77 is bound to this target, 0 is returned. The initial value is 0. See
78 glBindBuffer().
79 GL_BLEND
81 data returns a single boolean value indicating whether blending is
82 enabled. The initial value is GL_FALSE. See glBlendFunc().
83 GL_BLEND_COLOR
85 data returns four values, the red, green, blue, and alpha values
86 which are the components of the blend color. See glBlendColor().
87 GL_BLEND_DST_ALPHA
89 data returns one value, the symbolic constant identifying the alpha
90 destination blend function. The initial value is GL_ZERO. See
91 glBlendFunc() and glBlendFuncSeparate().
92 GL_BLEND_DST_RGB
94 data returns one value, the symbolic constant identifying the RGB
95 destination blend function. The initial value is GL_ZERO. See
96 glBlendFunc() and glBlendFuncSeparate().
97 GL_BLEND_EQUATION_RGB
99 data returns one value, a symbolic constant indicating whether the
100 RGB blend equation is GL_FUNC_ADD, GL_FUNC_SUBTRACT,
101 GL_FUNC_REVERSE_SUBTRACT, GL_MIN or GL_MAX. See
102 glBlendEquationSeparate().
103 GL_BLEND_EQUATION_ALPHA
105 data returns one value, a symbolic constant indicating whether the
106 Alpha blend equation is GL_FUNC_ADD, GL_FUNC_SUBTRACT,
107 GL_FUNC_REVERSE_SUBTRACT, GL_MIN or GL_MAX. See
108 glBlendEquationSeparate().
109 GL_BLEND_SRC_ALPHA
111 data returns one value, the symbolic constant identifying the alpha
112 source blend function. The initial value is GL_ONE. See
113 glBlendFunc() and glBlendFuncSeparate().
114 GL_BLEND_SRC_RGB
116 data returns one value, the symbolic constant identifying the RGB
117 source blend function. The initial value is GL_ONE. See
118 glBlendFunc() and glBlendFuncSeparate().
119 GL_COLOR_CLEAR_VALUE
121 data returns four values: the red, green, blue, and alpha values
122 used to clear the color buffers. Integer values, if requested, are
123 linearly mapped from the internal floating-point representation
124 such that 1.0 returns the most positive representable integer
125 value, and -1.0 returns the most negative representable integer
126 value. The initial value is (0, 0, 0, 0). See glClearColor().
127 GL_COLOR_LOGIC_OP
129 data returns a single boolean value indicating whether a fragment's
130 RGBA color values are merged into the framebuffer using a logical
131 operation. The initial value is GL_FALSE. See glLogicOp().
132 GL_COLOR_WRITEMASK
134 data returns four boolean values: the red, green, blue, and alpha
135 write enables for the color buffers. The initial value is (GL_TRUE,
136 GL_TRUE, GL_TRUE, GL_TRUE). See glColorMask().
137 GL_COMPRESSED_TEXTURE_FORMATS
139 data returns a list of symbolic constants of length
140 GL_NUM_COMPRESSED_TEXTURE_FORMATS indicating which compressed
141 texture formats are available. See glCompressedTexImage2D().
142 GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS
144 data returns one value, the maximum number of active shader storage
145 blocks that may be accessed by a compute shader.
146 GL_MAX_COMBINED_SHADER_STORAGE_BLOCKS
148 data returns one value, the maximum total number of active shader
149 storage blocks that may be accessed by all active shaders.
150 GL_MAX_COMPUTE_UNIFORM_BLOCKS
152 data returns one value, the maximum number of uniform blocks per
153 compute shader. The value must be at least 14. See
154 glUniformBlockBinding().
155 GL_MAX_COMPUTE_TEXTURE_IMAGE_UNITS
157 data returns one value, the maximum supported texture image units
158 that can be used to access texture maps from the compute shader.
159 The value may be at least 16. See glActiveTexture().
160 GL_MAX_COMPUTE_UNIFORM_COMPONENTS
162 data returns one value, the maximum number of individual
163 floating-point, integer, or boolean values that can be held in
164 uniform variable storage for a compute shader. The value must be at
165 least 1024. See glUniform().
166 GL_MAX_COMPUTE_ATOMIC_COUNTERS
168 data returns a single value, the maximum number of atomic counters
169 available to compute shaders.
170 GL_MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS
172 data returns a single value, the maximum number of atomic counter
173 buffers that may be accessed by a compute shader.
174 GL_MAX_COMBINED_COMPUTE_UNIFORM_COMPONENTS
176 data returns one value, the number of words for compute shader
177 uniform variables in all uniform blocks (including default). The
178 value must be at least 1. See glUniform().
179 GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS
181 data returns one value, the number of invocations in a single local
182 work group (i.e., the product of the three dimensions) that may be
183 dispatched to a compute shader.
184 GL_MAX_COMPUTE_WORK_GROUP_COUNT
186 Accepted by the indexed versions of glGet. data the maximum number
187 of work groups that may be dispatched to a compute shader. Indices
188 0, 1, and 2 correspond to the X, Y and Z dimensions, respectively.
189 GL_MAX_COMPUTE_WORK_GROUP_SIZE
191 Accepted by the indexed versions of glGet. data the maximum size
192 of a work groups that may be used during compilation of a compute
193 shader. Indices 0, 1, and 2 correspond to the X, Y and Z
194 dimensions, respectively.
195 GL_DISPATCH_INDIRECT_BUFFER_BINDING
197 data returns a single value, the name of the buffer object
198 currently bound to the target GL_DISPATCH_INDIRECT_BUFFER. If no
199 buffer object is bound to this target, 0 is returned. The initial
200 value is 0. See glBindBuffer().
201 GL_MAX_DEBUG_GROUP_STACK_DEPTH
203 data returns a single value, the maximum depth of the debug message
204 group stack.
205 GL_DEBUG_GROUP_STACK_DEPTH
207 data returns a single value, the current depth of the debug message
208 group stack.
209 GL_CONTEXT_FLAGS
211 data returns one value, the flags with which the context was
212 created (such as debugging functionality).
213 GL_CULL_FACE
215 data returns a single boolean value indicating whether polygon
216 culling is enabled. The initial value is GL_FALSE. See
217 glCullFace().
218 GL_CULL_FACE_MODE
220 data returns a single value indicating the mode of polygon culling.
221 The initial value is GL_BACK. See glCullFace().
222 GL_CURRENT_PROGRAM
224 data returns one value, the name of the program object that is
225 currently active, or 0 if no program object is active. See
226 glUseProgram().
227 GL_DEPTH_CLEAR_VALUE
229 data returns one value, the value that is used to clear the depth
230 buffer. Integer values, if requested, are linearly mapped from the
231 internal floating-point representation such that 1.0 returns the
232 most positive representable integer value, and -1.0 returns the
233 most negative representable integer value. The initial value is 1.
234 See glClearDepth().
235 GL_DEPTH_FUNC
237 data returns one value, the symbolic constant that indicates the
238 depth comparison function. The initial value is GL_LESS. See
239 glDepthFunc().
240 GL_DEPTH_RANGE
242 data returns two values: the near and far mapping limits for the
243 depth buffer. Integer values, if requested, are linearly mapped
244 from the internal floating-point representation such that 1.0
245 returns the most positive representable integer value, and -1.0
246 returns the most negative representable integer value. The initial
247 value is (0, 1). See glDepthRange().
248 GL_DEPTH_TEST
250 data returns a single boolean value indicating whether depth
251 testing of fragments is enabled. The initial value is GL_FALSE. See
252 glDepthFunc() and glDepthRange().
253 GL_DEPTH_WRITEMASK
255 data returns a single boolean value indicating if the depth buffer
256 is enabled for writing. The initial value is GL_TRUE. See
257 glDepthMask().
258 GL_DITHER
260 data returns a single boolean value indicating whether dithering of
261 fragment colors and indices is enabled. The initial value is
262 GL_TRUE.
263 GL_DOUBLEBUFFER
265 data returns a single boolean value indicating whether double
266 buffering is supported.
267 GL_DRAW_BUFFER
269 data returns one value, a symbolic constant indicating which
270 buffers are being drawn to. See glDrawBuffer(). The initial value
271 is GL_BACK if there are back buffers, otherwise it is GL_FRONT.
272 GL_DRAW_BUFFERi
274 data returns one value, a symbolic constant indicating which
275 buffers are being drawn to by the corresponding output color. See
276 glDrawBuffers(). The initial value of GL_DRAW_BUFFER0 is GL_BACK if
277 there are back buffers, otherwise it is GL_FRONT. The initial
278 values of draw buffers for all other output colors is GL_NONE.
279 GL_DRAW_FRAMEBUFFER_BINDING
281 data returns one value, the name of the framebuffer object
282 currently bound to the GL_DRAW_FRAMEBUFFER target. If the default
283 framebuffer is bound, this value will be zero. The initial value is
284 zero. See glBindFramebuffer().
285 GL_READ_FRAMEBUFFER_BINDING
287 data returns one value, the name of the framebuffer object
288 currently bound to the GL_READ_FRAMEBUFFER target. If the default
289 framebuffer is bound, this value will be zero. The initial value is
290 zero. See glBindFramebuffer().
291 GL_ELEMENT_ARRAY_BUFFER_BINDING
293 data returns a single value, the name of the buffer object
294 currently bound to the target GL_ELEMENT_ARRAY_BUFFER. If no buffer
295 object is bound to this target, 0 is returned. The initial value is
296 0. See glBindBuffer().
297 GL_FRAGMENT_SHADER_DERIVATIVE_HINT
299 data returns one value, a symbolic constant indicating the mode of
300 the derivative accuracy hint for fragment shaders. The initial
301 value is GL_DONT_CARE. See glHint().
302 GL_IMPLEMENTATION_COLOR_READ_FORMAT
304 data returns a single GLenum value indicating the implementation's
305 preferred pixel data format. See glReadPixels().
306 GL_IMPLEMENTATION_COLOR_READ_TYPE
308 data returns a single GLenum value indicating the implementation's
309 preferred pixel data type. See glReadPixels().
310 GL_LINE_SMOOTH
312 data returns a single boolean value indicating whether antialiasing
313 of lines is enabled. The initial value is GL_FALSE. See
314 glLineWidth().
315 GL_LINE_SMOOTH_HINT
317 data returns one value, a symbolic constant indicating the mode of
318 the line antialiasing hint. The initial value is GL_DONT_CARE. See
319 glHint().
320 GL_LINE_WIDTH
322 data returns one value, the line width as specified with
323 glLineWidth(). The initial value is 1.
324 GL_LAYER_PROVOKING_VERTEX
326 data returns one value, the implementation dependent specifc vertex
327 of a primitive that is used to select the rendering layer. If the
328 value returned is equivalent to GL_PROVOKING_VERTEX, then the
329 vertex selection follows the convention specified by
330 glProvokingVertex(). If the value returned is equivalent to
331 GL_FIRST_VERTEX_CONVENTION, then the selection is always taken from
332 the first vertex in the primitive. If the value returned is
333 equivalent to GL_LAST_VERTEX_CONVENTION, then the selection is
334 always taken from the last vertex in the primitive. If the value
335 returned is equivalent to GL_UNDEFINED_VERTEX, then the selection
336 is not guaranteed to be taken from any specific vertex in the
337 primitive.
338 GL_LOGIC_OP_MODE
340 data returns one value, a symbolic constant indicating the selected
341 logic operation mode. The initial value is GL_COPY. See
342 glLogicOp().
343 GL_MAJOR_VERSION
345 data returns one value, the major version number of the OpenGL API
346 supported by the current context.
347 GL_MAX_3D_TEXTURE_SIZE
349 data returns one value, a rough estimate of the largest 3D texture
350 that the GL can handle. The value must be at least 64. Use
351 GL_PROXY_TEXTURE_3D to determine if a texture is too large. See
352 glTexImage3D().
353 GL_MAX_ARRAY_TEXTURE_LAYERS
355 data returns one value. The value indicates the maximum number of
356 layers allowed in an array texture, and must be at least 256. See
357 glTexImage2D().
358 GL_MAX_CLIP_DISTANCES
360 data returns one value, the maximum number of application-defined
361 clipping distances. The value must be at least 8.
362 GL_MAX_COLOR_TEXTURE_SAMPLES
364 data returns one value, the maximum number of samples in a color
365 multisample texture.
366 GL_MAX_COMBINED_ATOMIC_COUNTERS
368 data returns a single value, the maximum number of atomic counters
369 available to all active shaders.
370 GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS
372 data returns one value, the number of words for fragment shader
373 uniform variables in all uniform blocks (including default). The
374 value must be at least 1. See glUniform().
375 GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS
377 data returns one value, the number of words for geometry shader
378 uniform variables in all uniform blocks (including default). The
379 value must be at least 1. See glUniform().
380 GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS
382 data returns one value, the maximum supported texture image units
383 that can be used to access texture maps from the vertex shader and
384 the fragment processor combined. If both the vertex shader and the
385 fragment processing stage access the same texture image unit, then
386 that counts as using two texture image units against this limit.
387 The value must be at least 48. See glActiveTexture().
388 GL_MAX_COMBINED_UNIFORM_BLOCKS
390 data returns one value, the maximum number of uniform blocks per
391 program. The value must be at least 70. See
392 glUniformBlockBinding().
393 GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS
395 data returns one value, the number of words for vertex shader
396 uniform variables in all uniform blocks (including default). The
397 value must be at least 1. See glUniform().
398 GL_MAX_CUBE_MAP_TEXTURE_SIZE
400 data returns one value. The value gives a rough estimate of the
401 largest cube-map texture that the GL can handle. The value must be
402 at least 1024. Use GL_PROXY_TEXTURE_CUBE_MAP to determine if a
403 texture is too large. See glTexImage2D().
404 GL_MAX_DEPTH_TEXTURE_SAMPLES
406 data returns one value, the maximum number of samples in a
407 multisample depth or depth-stencil texture.
408 GL_MAX_DRAW_BUFFERS
410 data returns one value, the maximum number of simultaneous outputs
411 that may be written in a fragment shader. The value must be at
412 least 8. See glDrawBuffers().
413 GL_MAX_DUAL_SOURCE_DRAW_BUFFERS
415 data returns one value, the maximum number of active draw buffers
416 when using dual-source blending. The value must be at least 1. See
417 glBlendFunc() and glBlendFuncSeparate().
418 GL_MAX_ELEMENTS_INDICES
420 data returns one value, the recommended maximum number of vertex
421 array indices. See glDrawRangeElements().
422 GL_MAX_ELEMENTS_VERTICES
424 data returns one value, the recommended maximum number of vertex
425 array vertices. See glDrawRangeElements().
426 GL_MAX_FRAGMENT_ATOMIC_COUNTERS
428 data returns a single value, the maximum number of atomic counters
429 available to fragment shaders.
430 GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS
432 data returns one value, the maximum number of active shader storage
433 blocks that may be accessed by a fragment shader.
434 GL_MAX_FRAGMENT_INPUT_COMPONENTS
436 data returns one value, the maximum number of components of the
437 inputs read by the fragment shader, which must be at least 128.
438 GL_MAX_FRAGMENT_UNIFORM_COMPONENTS
440 data returns one value, the maximum number of individual
441 floating-point, integer, or boolean values that can be held in
442 uniform variable storage for a fragment shader. The value must be
443 at least 1024. See glUniform().
444 GL_MAX_FRAGMENT_UNIFORM_VECTORS
446 data returns one value, the maximum number of individual 4-vectors
447 of floating-point, integer, or boolean values that can be held in
448 uniform variable storage for a fragment shader. The value is equal
449 to the value of GL_MAX_FRAGMENT_UNIFORM_COMPONENTS divided by 4 and
450 must be at least 256. See glUniform().
451 GL_MAX_FRAGMENT_UNIFORM_BLOCKS
453 data returns one value, the maximum number of uniform blocks per
454 fragment shader. The value must be at least 12. See
455 glUniformBlockBinding().
456 GL_MAX_FRAMEBUFFER_WIDTH
458 data returns one value, the maximum width for a framebuffer that
459 has no attachments, which must be at least 16384. See
460 glFramebufferParameter.
462 GL_MAX_FRAMEBUFFER_HEIGHT
464 data returns one value, the maximum height for a framebuffer that
465 has no attachments, which must be at least 16384. See
466 glFramebufferParameter.
468 GL_MAX_FRAMEBUFFER_LAYERS
470 data returns one value, the maximum number of layers for a
471 framebuffer that has no attachments, which must be at least 2048.
472 See
473 glFramebufferParameter.
475 GL_MAX_FRAMEBUFFER_SAMPLES
477 data returns one value, the maximum samples in a framebuffer that
478 has no attachments, which must be at least 4. See
479 glFramebufferParameter.
481 GL_MAX_GEOMETRY_ATOMIC_COUNTERS
483 data returns a single value, the maximum number of atomic counters
484 available to geometry shaders.
485 GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS
487 data returns one value, the maximum number of active shader storage
488 blocks that may be accessed by a geometry shader.
489 GL_MAX_GEOMETRY_INPUT_COMPONENTS
491 data returns one value, the maximum number of components of inputs
492 read by a geometry shader, which must be at least 64.
493 GL_MAX_GEOMETRY_OUTPUT_COMPONENTS
495 data returns one value, the maximum number of components of outputs
496 written by a geometry shader, which must be at least 128.
497 GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS
499 data returns one value, the maximum supported texture image units
500 that can be used to access texture maps from the geometry shader.
501 The value must be at least 16. See glActiveTexture().
502 GL_MAX_GEOMETRY_UNIFORM_BLOCKS
504 data returns one value, the maximum number of uniform blocks per
505 geometry shader. The value must be at least 12. See
506 glUniformBlockBinding().
507 GL_MAX_GEOMETRY_UNIFORM_COMPONENTS
509 data returns one value, the maximum number of individual
510 floating-point, integer, or boolean values that can be held in
511 uniform variable storage for a geometry shader. The value must be
512 at least 1024. See glUniform().
513 GL_MAX_INTEGER_SAMPLES
515 data returns one value, the maximum number of samples supported in
516 integer format multisample buffers.
517 GL_MIN_MAP_BUFFER_ALIGNMENT
519 data returns one value, the minimum alignment in basic machine
520 units of pointers returned fromglMapBuffer() and
521 glMapBufferRange(). This value must be a power of two and must be
522 at least 64.
523 GL_MAX_LABEL_LENGTH
525 data returns one value, the maximum length of a label that may be
526 assigned to an object. See glObjectLabel() and glObjectPtrLabel().
527 GL_MAX_PROGRAM_TEXEL_OFFSET
529 data returns one value, the maximum texel offset allowed in a
530 texture lookup, which must be at least 7.
531 GL_MIN_PROGRAM_TEXEL_OFFSET
533 data returns one value, the minimum texel offset allowed in a
534 texture lookup, which must be at most -8.
535 GL_MAX_RECTANGLE_TEXTURE_SIZE
537 data returns one value. The value gives a rough estimate of the
538 largest rectangular texture that the GL can handle. The value must
539 be at least 1024. Use GL_PROXY_TEXTURE_RECTANGLE to determine if a
540 texture is too large. See glTexImage2D().
541 GL_MAX_RENDERBUFFER_SIZE
543 data returns one value. The value indicates the maximum supported
544 size for renderbuffers. See glFramebufferRenderbuffer().
545 GL_MAX_SAMPLE_MASK_WORDS
547 data returns one value, the maximum number of sample mask words.
548 GL_MAX_SERVER_WAIT_TIMEOUT
550 data returns one value, the maximum glWaitSync() timeout interval.
551 GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS
553 data returns one value, the maximum number of shader storage buffer
554 binding points on the context, which must be at least 8.
555 GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS
557 data returns a single value, the maximum number of atomic counters
558 available to tessellation control shaders.
559 GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS
561 data returns a single value, the maximum number of atomic counters
562 available to tessellation evaluation shaders.
563 GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS
565 data returns one value, the maximum number of active shader storage
566 blocks that may be accessed by a tessellation control shader.
567 GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS
569 data returns one value, the maximum number of active shader storage
570 blocks that may be accessed by a tessellation evaluation shader.
571 GL_MAX_TEXTURE_BUFFER_SIZE
573 data returns one value. The value gives the maximum number of
574 texels allowed in the texel array of a texture buffer object. Value
575 must be at least 65536.
576 GL_MAX_TEXTURE_IMAGE_UNITS
578 data returns one value, the maximum supported texture image units
579 that can be used to access texture maps from the fragment shader.
580 The value must be at least 16. See glActiveTexture().
581 GL_MAX_TEXTURE_LOD_BIAS
583 data returns one value, the maximum, absolute value of the texture
584 level-of-detail bias. The value must be at least 2.0.
585 GL_MAX_TEXTURE_SIZE
587 data returns one value. The value gives a rough estimate of the
588 largest texture that the GL can handle. The value must be at least
589 1024. Use a proxy texture target such as GL_PROXY_TEXTURE_1D or
590 GL_PROXY_TEXTURE_2D to determine if a texture is too large. See
591 glTexImage1D() and glTexImage2D().
592 GL_MAX_UNIFORM_BUFFER_BINDINGS
594 data returns one value, the maximum number of uniform buffer
595 binding points on the context, which must be at least 36.
596 GL_MAX_UNIFORM_BLOCK_SIZE
598 data returns one value, the maximum size in basic machine units of
599 a uniform block, which must be at least 16384.
600 GL_MAX_UNIFORM_LOCATIONS
602 data returns one value, the maximum number of explicitly assignable
603 uniform locations, which must be at least 1024.
604 GL_MAX_VARYING_COMPONENTS
606 data returns one value, the number components for varying
607 variables, which must be at least 60.
608 GL_MAX_VARYING_VECTORS
610 data returns one value, the number 4-vectors for varying variables,
611 which is equal to the value of GL_MAX_VARYING_COMPONENTS and must
612 be at least 15.
613 GL_MAX_VARYING_FLOATS
615 data returns one value, the maximum number of interpolators
616 available for processing varying variables used by vertex and
617 fragment shaders. This value represents the number of individual
618 floating-point values that can be interpolated; varying variables
619 declared as vectors, matrices, and arrays will all consume multiple
620 interpolators. The value must be at least 32.
621 GL_MAX_VERTEX_ATOMIC_COUNTERS
623 data returns a single value, the maximum number of atomic counters
624 available to vertex shaders.
625 GL_MAX_VERTEX_ATTRIBS
627 data returns one value, the maximum number of 4-component generic
628 vertex attributes accessible to a vertex shader. The value must be
629 at least 16. See glVertexAttrib().
630 GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS
632 data returns one value, the maximum number of active shader storage
633 blocks that may be accessed by a vertex shader.
634 GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS
636 data returns one value, the maximum supported texture image units
637 that can be used to access texture maps from the vertex shader. The
638 value may be at least 16. See glActiveTexture().
639 GL_MAX_VERTEX_UNIFORM_COMPONENTS
641 data returns one value, the maximum number of individual
642 floating-point, integer, or boolean values that can be held in
643 uniform variable storage for a vertex shader. The value must be at
644 least 1024. See glUniform().
645 GL_MAX_VERTEX_UNIFORM_VECTORS
647 data returns one value, the maximum number of 4-vectors that may be
648 held in uniform variable storage for the vertex shader. The value
649 of GL_MAX_VERTEX_UNIFORM_VECTORS is equal to the value of
650 GL_MAX_VERTEX_UNIFORM_COMPONENTS and must be at least 256.
651 GL_MAX_VERTEX_OUTPUT_COMPONENTS
653 data returns one value, the maximum number of components of output
654 written by a vertex shader, which must be at least 64.
655 GL_MAX_VERTEX_UNIFORM_BLOCKS
657 data returns one value, the maximum number of uniform blocks per
658 vertex shader. The value must be at least 12. See
659 glUniformBlockBinding().
660 GL_MAX_VIEWPORT_DIMS
662 data returns two values: the maximum supported width and height of
663 the viewport. These must be at least as large as the visible
664 dimensions of the display being rendered to. See glViewport().
665 GL_MAX_VIEWPORTS
667 data returns one value, the maximum number of simultaneous
668 viewports that are supported. The value must be at least 16. See
669 glViewportIndexed().
670 GL_MINOR_VERSION
672 data returns one value, the minor version number of the OpenGL API
673 supported by the current context.
674 GL_NUM_COMPRESSED_TEXTURE_FORMATS
676 data returns a single integer value indicating the number of
677 available compressed texture formats. The minimum value is 4. See
678 glCompressedTexImage2D().
679 GL_NUM_EXTENSIONS
681 data returns one value, the number of extensions supported by the
682 GL implementation for the current context. See glGetString().
683 GL_NUM_PROGRAM_BINARY_FORMATS
685 data returns one value, the number of program binary formats
686 supported by the implementation.
687 GL_NUM_SHADER_BINARY_FORMATS
689 data returns one value, the number of binary shader formats
690 supported by the implementation. If this value is greater than
691 zero, then the implementation supports loading binary shaders. If
692 it is zero, then the loading of binary shaders by the
693 implementation is not supported.
694 GL_PACK_ALIGNMENT
696 data returns one value, the byte alignment used for writing pixel
697 data to memory. The initial value is 4. See glPixelStore().
698 GL_PACK_IMAGE_HEIGHT
700 data returns one value, the image height used for writing pixel
701 data to memory. The initial value is 0. See glPixelStore().
702 GL_PACK_LSB_FIRST
704 data returns a single boolean value indicating whether single-bit
705 pixels being written to memory are written first to the least
706 significant bit of each unsigned byte. The initial value is
707 GL_FALSE. See glPixelStore().
708 GL_PACK_ROW_LENGTH
710 data returns one value, the row length used for writing pixel data
711 to memory. The initial value is 0. See glPixelStore().
712 GL_PACK_SKIP_IMAGES
714 data returns one value, the number of pixel images skipped before
715 the first pixel is written into memory. The initial value is 0. See
716 glPixelStore().
717 GL_PACK_SKIP_PIXELS
719 data returns one value, the number of pixel locations skipped
720 before the first pixel is written into memory. The initial value is
721 0. See glPixelStore().
722 GL_PACK_SKIP_ROWS
724 data returns one value, the number of rows of pixel locations
725 skipped before the first pixel is written into memory. The initial
726 value is 0. See glPixelStore().
727 GL_PACK_SWAP_BYTES
729 data returns a single boolean value indicating whether the bytes of
730 two-byte and four-byte pixel indices and components are swapped
731 before being written to memory. The initial value is GL_FALSE. See
732 glPixelStore().
733 GL_PIXEL_PACK_BUFFER_BINDING
735 data returns a single value, the name of the buffer object
736 currently bound to the target GL_PIXEL_PACK_BUFFER. If no buffer
737 object is bound to this target, 0 is returned. The initial value is
738 0. See glBindBuffer().
739 GL_PIXEL_UNPACK_BUFFER_BINDING
741 data returns a single value, the name of the buffer object
742 currently bound to the target GL_PIXEL_UNPACK_BUFFER. If no buffer
743 object is bound to this target, 0 is returned. The initial value is
744 0. See glBindBuffer().
745 GL_POINT_FADE_THRESHOLD_SIZE
747 data returns one value, the point size threshold for determining
748 the point size. See glPointParameter().
749 GL_PRIMITIVE_RESTART_INDEX
751 data returns one value, the current primitive restart index. The
752 initial value is 0. See glPrimitiveRestartIndex().
753 GL_PROGRAM_BINARY_FORMATS
755 data an array of GL_NUM_PROGRAM_BINARY_FORMATS values, indicating
756 the proram binary formats supported by the implementation.
757 GL_PROGRAM_PIPELINE_BINDING
759 data a single value, the name of the currently bound program
760 pipeline object, or zero if no program pipeline object is bound.
761 See glBindProgramPipeline().
762 GL_PROGRAM_POINT_SIZE
764 data returns a single boolean value indicating whether vertex
765 program point size mode is enabled. If enabled, then the point size
766 is taken from the shader built-in gl_PointSize. If disabled, then
767 the point size is taken from the point state as specified by
768 glPointSize(). The initial value is GL_FALSE.
769 GL_PROVOKING_VERTEX
771 data returns one value, the currently selected provoking vertex
772 convention. The initial value is GL_LAST_VERTEX_CONVENTION. See
773 glProvokingVertex().
774 GL_POINT_SIZE
776 data returns one value, the point size as specified by
777 glPointSize(). The initial value is 1.
778 GL_POINT_SIZE_GRANULARITY
780 data returns one value, the size difference between adjacent
781 supported sizes for antialiased points. See glPointSize().
782 GL_POINT_SIZE_RANGE
784 data returns two values: the smallest and largest supported sizes
785 for antialiased points. The smallest size must be at most 1, and
786 the largest size must be at least 1. See glPointSize().
787 GL_POLYGON_OFFSET_FACTOR
789 data returns one value, the scaling factor used to determine the
790 variable offset that is added to the depth value of each fragment
791 generated when a polygon is rasterized. The initial value is 0. See
792 glPolygonOffset().
793 GL_POLYGON_OFFSET_UNITS
795 data returns one value. This value is multiplied by an
796 implementation-specific value and then added to the depth value of
797 each fragment generated when a polygon is rasterized. The initial
798 value is 0. See glPolygonOffset().
799 GL_POLYGON_OFFSET_FILL
801 data returns a single boolean value indicating whether polygon
802 offset is enabled for polygons in fill mode. The initial value is
803 GL_FALSE. See glPolygonOffset().
804 GL_POLYGON_OFFSET_LINE
806 data returns a single boolean value indicating whether polygon
807 offset is enabled for polygons in line mode. The initial value is
808 GL_FALSE. See glPolygonOffset().
809 GL_POLYGON_OFFSET_POINT
811 data returns a single boolean value indicating whether polygon
812 offset is enabled for polygons in point mode. The initial value is
813 GL_FALSE. See glPolygonOffset().
814 GL_POLYGON_SMOOTH
816 data returns a single boolean value indicating whether antialiasing
817 of polygons is enabled. The initial value is GL_FALSE. See
818 glPolygonMode().
819 GL_POLYGON_SMOOTH_HINT
821 data returns one value, a symbolic constant indicating the mode of
822 the polygon antialiasing hint. The initial value is GL_DONT_CARE.
823 See glHint().
824 GL_READ_BUFFER
826 data returns one value, a symbolic constant indicating which color
827 buffer is selected for reading. The initial value is GL_BACK if
828 there is a back buffer, otherwise it is GL_FRONT. See
829 glReadPixels().
830 GL_RENDERBUFFER_BINDING
832 data returns a single value, the name of the renderbuffer object
833 currently bound to the target GL_RENDERBUFFER. If no renderbuffer
834 object is bound to this target, 0 is returned. The initial value is
835 0. See glBindRenderbuffer().
836 GL_SAMPLE_BUFFERS
838 data returns a single integer value indicating the number of sample
839 buffers associated with the framebuffer. See glSampleCoverage().
840 GL_SAMPLE_COVERAGE_VALUE
842 data returns a single positive floating-point value indicating the
843 current sample coverage value. See glSampleCoverage().
844 GL_SAMPLE_COVERAGE_INVERT
846 data returns a single boolean value indicating if the temporary
847 coverage value should be inverted. See glSampleCoverage().
848 GL_SAMPLER_BINDING
850 data returns a single value, the name of the sampler object
851 currently bound to the active texture unit. The initial value is 0.
852 See glBindSampler().
853 GL_SAMPLES
855 data returns a single integer value indicating the coverage mask
856 size. See glSampleCoverage().
857 GL_SCISSOR_BOX
859 data returns four values: the x and y window coordinates of the
860 scissor box, followed by its width and height. Initially the x and
861 y window coordinates are both 0 and the width and height are set to
862 the size of the window. See glScissor().
863 GL_SCISSOR_TEST
865 data returns a single boolean value indicating whether scissoring
866 is enabled. The initial value is GL_FALSE. See glScissor().
867 GL_SHADER_COMPILER
869 data returns a single boolean value indicating whether an online
870 shader compiler is present in the implementation. All desktop
871 OpenGL implementations must support online shader compilations, and
872 therefore the value of GL_SHADER_COMPILER will always be GL_TRUE.
873 GL_SHADER_STORAGE_BUFFER_BINDING
875 When used with non-indexed variants of glGet (such as
876 glGetIntegerv), data returns a single value, the name of the buffer
877 object currently bound to the target GL_SHADER_STORAGE_BUFFER. If
878 no buffer object is bound to this target, 0 is returned. When used
879 with indexed variants of glGet (such as glGetIntegeri_v), data
880 returns a single value, the name of the buffer object bound to the
881 indexed shader storage buffer binding points. The initial value is
882 0 for all targets. See glBindBuffer(), glBindBufferBase(), and
883 glBindBufferRange().
884 GL_SHADER_STORAGE_BUFFER_OFFSET_ALIGNMENT
886 data returns a single value, the minimum required alignment for
887 shader storage buffer sizes and offset. The initial value is 1. See
888 glShaderStorageBlockBinding().
889 GL_SHADER_STORAGE_BUFFER_START
891 When used with indexed variants of glGet (such as
892 glGetInteger64i_v), data returns a single value, the start offset
893 of the binding range for each indexed shader storage buffer
894 binding. The initial value is 0 for all bindings. See
895 glBindBufferRange().
896 GL_SHADER_STORAGE_BUFFER_SIZE
898 When used with indexed variants of glGet (such as
899 glGetInteger64i_v), data returns a single value, the size of the
900 binding range for each indexed shader storage buffer binding. The
901 initial value is 0 for all bindings. See glBindBufferRange().
902 GL_SMOOTH_LINE_WIDTH_RANGE
904 data returns a pair of values indicating the range of widths
905 supported for smooth (antialiased) lines. See glLineWidth().
906 GL_SMOOTH_LINE_WIDTH_GRANULARITY
908 data returns a single value indicating the level of quantization
909 applied to smooth line width parameters.
910 GL_STENCIL_BACK_FAIL
912 data returns one value, a symbolic constant indicating what action
913 is taken for back-facing polygons when the stencil test fails. The
914 initial value is GL_KEEP. See glStencilOpSeparate().
915 GL_STENCIL_BACK_FUNC
917 data returns one value, a symbolic constant indicating what
918 function is used for back-facing polygons to compare the stencil
919 reference value with the stencil buffer value. The initial value is
920 GL_ALWAYS. See glStencilFuncSeparate().
921 GL_STENCIL_BACK_PASS_DEPTH_FAIL
923 data returns one value, a symbolic constant indicating what action
924 is taken for back-facing polygons when the stencil test passes, but
925 the depth test fails. The initial value is GL_KEEP. See
926 glStencilOpSeparate().
927 GL_STENCIL_BACK_PASS_DEPTH_PASS
929 data returns one value, a symbolic constant indicating what action
930 is taken for back-facing polygons when the stencil test passes and
931 the depth test passes. The initial value is GL_KEEP. See
932 glStencilOpSeparate().
933 GL_STENCIL_BACK_REF
935 data returns one value, the reference value that is compared with
936 the contents of the stencil buffer for back-facing polygons. The
937 initial value is 0. See glStencilFuncSeparate().
938 GL_STENCIL_BACK_VALUE_MASK
940 data returns one value, the mask that is used for back-facing
941 polygons to mask both the stencil reference value and the stencil
942 buffer value before they are compared. The initial value is all
943 1's. See glStencilFuncSeparate().
944 GL_STENCIL_BACK_WRITEMASK
946 data returns one value, the mask that controls writing of the
947 stencil bitplanes for back-facing polygons. The initial value is
948 all 1's. See glStencilMaskSeparate().
949 GL_STENCIL_CLEAR_VALUE
951 data returns one value, the index to which the stencil bitplanes
952 are cleared. The initial value is 0. See glClearStencil().
953 GL_STENCIL_FAIL
955 data returns one value, a symbolic constant indicating what action
956 is taken when the stencil test fails. The initial value is GL_KEEP.
957 See glStencilOp(). This stencil state only affects non-polygons and
958 front-facing polygons. Back-facing polygons use separate stencil
959 state. See glStencilOpSeparate().
960 GL_STENCIL_FUNC
962 data returns one value, a symbolic constant indicating what
963 function is used to compare the stencil reference value with the
964 stencil buffer value. The initial value is GL_ALWAYS. See
965 glStencilFunc(). This stencil state only affects non-polygons and
966 front-facing polygons. Back-facing polygons use separate stencil
967 state. See glStencilFuncSeparate().
968 GL_STENCIL_PASS_DEPTH_FAIL
970 data returns one value, a symbolic constant indicating what action
971 is taken when the stencil test passes, but the depth test fails.
972 The initial value is GL_KEEP. See glStencilOp(). This stencil state
973 only affects non-polygons and front-facing polygons. Back-facing
974 polygons use separate stencil state. See glStencilOpSeparate().
975 GL_STENCIL_PASS_DEPTH_PASS
977 data returns one value, a symbolic constant indicating what action
978 is taken when the stencil test passes and the depth test passes.
979 The initial value is GL_KEEP. See glStencilOp(). This stencil state
980 only affects non-polygons and front-facing polygons. Back-facing
981 polygons use separate stencil state. See glStencilOpSeparate().
982 GL_STENCIL_REF
984 data returns one value, the reference value that is compared with
985 the contents of the stencil buffer. The initial value is 0. See
986 glStencilFunc(). This stencil state only affects non-polygons and
987 front-facing polygons. Back-facing polygons use separate stencil
988 state. See glStencilFuncSeparate().
989 GL_STENCIL_TEST
991 data returns a single boolean value indicating whether stencil
992 testing of fragments is enabled. The initial value is GL_FALSE. See
993 glStencilFunc() and glStencilOp().
994 GL_STENCIL_VALUE_MASK
996 data returns one value, the mask that is used to mask both the
997 stencil reference value and the stencil buffer value before they
998 are compared. The initial value is all 1's. See glStencilFunc().
999 This stencil state only affects non-polygons and front-facing
1000 polygons. Back-facing polygons use separate stencil state. See
1001 glStencilFuncSeparate().
1002 GL_STENCIL_WRITEMASK
1004 data returns one value, the mask that controls writing of the
1005 stencil bitplanes. The initial value is all 1's. See
1006 glStencilMask(). This stencil state only affects non-polygons and
1007 front-facing polygons. Back-facing polygons use separate stencil
1008 state. See glStencilMaskSeparate().
1009 GL_STEREO
1011 data returns a single boolean value indicating whether stereo
1012 buffers (left and right) are supported.
1013 GL_SUBPIXEL_BITS
1015 data returns one value, an estimate of the number of bits of
1016 subpixel resolution that are used to position rasterized geometry
1017 in window coordinates. The value must be at least 4.
1018 GL_TEXTURE_BINDING_1D
1020 data returns a single value, the name of the texture currently
1021 bound to the target GL_TEXTURE_1D. The initial value is 0. See
1022 glBindTexture().
1023 GL_TEXTURE_BINDING_1D_ARRAY
1025 data returns a single value, the name of the texture currently
1026 bound to the target GL_TEXTURE_1D_ARRAY. The initial value is 0.
1027 See glBindTexture().
1028 GL_TEXTURE_BINDING_2D
1030 data returns a single value, the name of the texture currently
1031 bound to the target GL_TEXTURE_2D. The initial value is 0. See
1032 glBindTexture().
1033 GL_TEXTURE_BINDING_2D_ARRAY
1035 data returns a single value, the name of the texture currently
1036 bound to the target GL_TEXTURE_2D_ARRAY. The initial value is 0.
1037 See glBindTexture().
1038 GL_TEXTURE_BINDING_2D_MULTISAMPLE
1040 data returns a single value, the name of the texture currently
1041 bound to the target GL_TEXTURE_2D_MULTISAMPLE. The initial value is
1042 0. See glBindTexture().
1043 GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY
1045 data returns a single value, the name of the texture currently
1046 bound to the target GL_TEXTURE_2D_MULTISAMPLE_ARRAY. The initial
1047 value is 0. See glBindTexture().
1048 GL_TEXTURE_BINDING_3D
1050 data returns a single value, the name of the texture currently
1051 bound to the target GL_TEXTURE_3D. The initial value is 0. See
1052 glBindTexture().
1053 GL_TEXTURE_BINDING_BUFFER
1055 data returns a single value, the name of the texture currently
1056 bound to the target GL_TEXTURE_BUFFER. The initial value is 0. See
1057 glBindTexture().
1058 GL_TEXTURE_BINDING_CUBE_MAP
1060 data returns a single value, the name of the texture currently
1061 bound to the target GL_TEXTURE_CUBE_MAP. The initial value is 0.
1062 See glBindTexture().
1063 GL_TEXTURE_BINDING_RECTANGLE
1065 data returns a single value, the name of the texture currently
1066 bound to the target GL_TEXTURE_RECTANGLE. The initial value is 0.
1067 See glBindTexture().
1068 GL_TEXTURE_COMPRESSION_HINT
1070 data returns a single value indicating the mode of the texture
1071 compression hint. The initial value is GL_DONT_CARE.
1072 GL_TEXTURE_BINDING_BUFFER
1074 data returns a single value, the name of the buffer object
1075 currently bound to the GL_TEXTURE_BUFFER buffer binding point. The
1076 initial value is 0. See glBindBuffer().
1077 GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT
1079 data returns a single value, the minimum required alignment for
1080 texture buffer sizes and offset. The initial value is 1. See
1081 glUniformBlockBinding().
1082 GL_TIMESTAMP
1084 data returns a single value, the 64-bit value of the current GL
1085 time. See glQueryCounter().
1086 GL_TRANSFORM_FEEDBACK_BUFFER_BINDING
1088 When used with non-indexed variants of glGet (such as
1089 glGetIntegerv), data returns a single value, the name of the buffer
1090 object currently bound to the target GL_TRANSFORM_FEEDBACK_BUFFER.
1091 If no buffer object is bound to this target, 0 is returned. When
1092 used with indexed variants of glGet (such as glGetIntegeri_v), data
1093 returns a single value, the name of the buffer object bound to the
1094 indexed transform feedback attribute stream. The initial value is 0
1095 for all targets. See glBindBuffer(), glBindBufferBase(), and
1096 glBindBufferRange().
1097 GL_TRANSFORM_FEEDBACK_BUFFER_START
1099 When used with indexed variants of glGet (such as
1100 glGetInteger64i_v), data returns a single value, the start offset
1101 of the binding range for each transform feedback attribute stream.
1102 The initial value is 0 for all streams. See glBindBufferRange().
1103 GL_TRANSFORM_FEEDBACK_BUFFER_SIZE
1105 When used with indexed variants of glGet (such as
1106 glGetInteger64i_v), data returns a single value, the size of the
1107 binding range for each transform feedback attribute stream. The
1108 initial value is 0 for all streams. See glBindBufferRange().
1109 GL_UNIFORM_BUFFER_BINDING
1111 When used with non-indexed variants of glGet (such as
1112 glGetIntegerv), data returns a single value, the name of the buffer
1113 object currently bound to the target GL_UNIFORM_BUFFER. If no
1114 buffer object is bound to this target, 0 is returned. When used
1115 with indexed variants of glGet (such as glGetIntegeri_v), data
1116 returns a single value, the name of the buffer object bound to the
1117 indexed uniform buffer binding point. The initial value is 0 for
1118 all targets. See glBindBuffer(), glBindBufferBase(), and
1119 glBindBufferRange().
1120 GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT
1122 data returns a single value, the minimum required alignment for
1123 uniform buffer sizes and offset. The initial value is 1. See
1124 glUniformBlockBinding().
1125 GL_UNIFORM_BUFFER_SIZE
1127 When used with indexed variants of glGet (such as
1128 glGetInteger64i_v), data returns a single value, the size of the
1129 binding range for each indexed uniform buffer binding. The initial
1130 value is 0 for all bindings. See glBindBufferRange().
1131 GL_UNIFORM_BUFFER_START
1133 When used with indexed variants of glGet (such as
1134 glGetInteger64i_v), data returns a single value, the start offset
1135 of the binding range for each indexed uniform buffer binding. The
1136 initial value is 0 for all bindings. See glBindBufferRange().
1137 GL_UNPACK_ALIGNMENT
1139 data returns one value, the byte alignment used for reading pixel
1140 data from memory. The initial value is 4. See glPixelStore().
1141 GL_UNPACK_IMAGE_HEIGHT
1143 data returns one value, the image height used for reading pixel
1144 data from memory. The initial is 0. See glPixelStore().
1145 GL_UNPACK_LSB_FIRST
1147 data returns a single boolean value indicating whether single-bit
1148 pixels being read from memory are read first from the least
1149 significant bit of each unsigned byte. The initial value is
1150 GL_FALSE. See glPixelStore().
1151 GL_UNPACK_ROW_LENGTH
1153 data returns one value, the row length used for reading pixel data
1154 from memory. The initial value is 0. See glPixelStore().
1155 GL_UNPACK_SKIP_IMAGES
1157 data returns one value, the number of pixel images skipped before
1158 the first pixel is read from memory. The initial value is 0. See
1159 glPixelStore().
1160 GL_UNPACK_SKIP_PIXELS
1162 data returns one value, the number of pixel locations skipped
1163 before the first pixel is read from memory. The initial value is 0.
1164 See glPixelStore().
1165 GL_UNPACK_SKIP_ROWS
1167 data returns one value, the number of rows of pixel locations
1168 skipped before the first pixel is read from memory. The initial
1169 value is 0. See glPixelStore().
1170 GL_UNPACK_SWAP_BYTES
1172 data returns a single boolean value indicating whether the bytes of
1173 two-byte and four-byte pixel indices and components are swapped
1174 after being read from memory. The initial value is GL_FALSE. See
1175 glPixelStore().
1176 GL_VERTEX_ARRAY_BINDING
1178 data returns a single value, the name of the vertex array object
1179 currently bound to the context. If no vertex array object is bound
1180 to the context, 0 is returned. The initial value is 0. See
1181 glBindVertexArray().
1182 GL_VERTEX_BINDING_DIVISOR
1184 Accepted by the indexed forms. data returns a single integer value
1185 representing the instance step divisor of the first element in the
1186 bound buffer's data store for vertex attribute bound to index.
1187 GL_VERTEX_BINDING_OFFSET
1189 Accepted by the indexed forms. data returns a single integer value
1190 representing the byte offset of the first element in the bound
1191 buffer's data store for vertex attribute bound to index.
1192 GL_VERTEX_BINDING_STRIDE
1194 Accepted by the indexed forms. data returns a single integer value
1195 representing the byte offset between the start of each element in
1196 the bound buffer's data store for vertex attribute bound to index.
1197 GL_MAX_VERTEX_ATTRIB_RELATIVE_OFFSET
1199 data returns a single integer value containing the maximum offset
1200 that may be added to a vertex binding offset.
1201 GL_MAX_VERTEX_ATTRIB_BINDINGS
1203 data returns a single integer value containing the maximum number
1204 of vertex buffers that may be bound.
1205 GL_VIEWPORT
1207 When used with non-indexed variants of glGet (such as
1208 glGetIntegerv), data returns four values: the x and y window
1209 coordinates of the viewport, followed by its width and height.
1210 Initially the x and y window coordinates are both set to 0, and the
1211 width and height are set to the width and height of the window into
1212 which the GL will do its rendering. See glViewport().
1213 When used with indexed variants of glGet (such as glGetIntegeri_v),
1215 data returns four values: the x and y window coordinates of the
1216 indexed viewport, followed by its width and height. Initially the x
1217 and y window coordinates are both set to 0, and the width and
1218 height are set to the width and height of the window into which the
1219 GL will do its rendering. See
1220 glViewportIndexedf.
1222 GL_VIEWPORT_BOUNDS_RANGE
1224 data returns two values, the minimum and maximum viewport bounds
1225 range. The minimum range should be at least [-32768, 32767].
1226 GL_VIEWPORT_INDEX_PROVOKING_VERTEX
1228 data returns one value, the implementation dependent specifc vertex
1229 of a primitive that is used to select the viewport index. If the
1230 value returned is equivalent to GL_PROVOKING_VERTEX, then the
1231 vertex selection follows the convention specified by
1232 glProvokingVertex(). If the value returned is equivalent to
1233 GL_FIRST_VERTEX_CONVENTION, then the selection is always taken from
1234 the first vertex in the primitive. If the value returned is
1235 equivalent to GL_LAST_VERTEX_CONVENTION, then the selection is
1236 always taken from the last vertex in the primitive. If the value
1237 returned is equivalent to GL_UNDEFINED_VERTEX, then the selection
1238 is not guaranteed to be taken from any specific vertex in the
1239 primitive.
1240 GL_VIEWPORT_SUBPIXEL_BITS
1242 data returns a single value, the number of bits of sub-pixel
1243 precision which the GL uses to interpret the floating point
1244 viewport bounds. The minimum value is 0.
1245 GL_MAX_ELEMENT_INDEX
1247 data returns a single value, the maximum index that may be
1248 specified during the transfer of generic vertex attributes to the
1249 GL.
1250 Many of the boolean parameters can also be queried more easily using
1252 glIsEnabled().
1253
1255 The following parameters return the associated value for the active
1256 texture unit: GL_TEXTURE_1D, GL_TEXTURE_BINDING_1D, GL_TEXTURE_2D,
1257 GL_TEXTURE_BINDING_2D, GL_TEXTURE_3D and GL_TEXTURE_BINDING_3D.
1258 GL_MAX_VIEWPORTS, GL_VIEWPORT_SUBPIXEL_BITS, GL_VIEWPORT_BOUNDS_RANGE,
1260 GL_LAYER_PROVOKING_VERTEX, and GL_VIEWPORT_INDEX_PROVOKING_VERTEX are
1261 available only if the GL version is 4.1 or greater.
1262 GL_MAX_VERTEX_ATOMIC_COUNTERS, GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS,
1264 GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS,
1265 GL_MAX_GEOMETRY_ATOMIC_COUNTERS, GL_MAX_FRAMGENT_ATOMIC_COUNTERS, and
1266 GL_MIN_MAP_BUFFER_ALIGNMENT are accepted by pname only if the GL
1267 version is 4.2 or greater.
1268 GL_MAX_ELEMENT_INDEX is accepted by pname only if the GL version is 4.3
1270 or greater.
1271 GL_MAX_COMPUTE_UNIFORM_BLOCKS, GL_MAX_COMPUTE_TEXTURE_IMAGE_UNITS,
1273 GL_MAX_COMPUTE_UNIFORM_COMPONENTS, GL_MAX_COMPUTE_ATOMIC_COUNTERS,
1274 GL_MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS,
1275 GL_MAX_COMBINED_COMPUTE_UNIFORM_COMPONENTS,
1276 GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS, GL_MAX_COMPUTE_WORK_GROUP_COUNT,
1277 and GL_MAX_COMPUTE_WORK_GROUP_SIZE and
1278 GL_DISPATCH_INDIRECT_BUFFER_BINDING are available only if the GL
1279 version is 4.3 or greater.
1280 GL_MAX_DEBUG_GROUP_STACK_DEPTH, GL_DEBUG_GROUP_STACK_DEPTH and
1282 GL_MAX_LABEL_LENGTH are accepted only if the GL version is 4.3 or
1283 greater.
1284 GL_MAX_UNIFORM_LOCATIONS is accepted only if the GL version is 4.3 or
1286 greater.
1287 GL_MAX_FRAMEBUFFER_WIDTH, GL_MAX_FRAMEBUFFER_HEIGHT,
1289 GL_MAX_FRAMEBUFFER_LAYERS, and GL_MAX_FRAMEBUFFER_SAMPLES are available
1290 only if the GL version is 4.3 or greater.
1291 GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS,
1293 GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS,
1294 GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS,
1295 GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS,
1296 GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS, and
1297 GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS are available only if the GL
1298 version is 4.3 or higher.
1299 GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT is available only if the GL version
1301 is 4.3 or greater.
1302 GL_VERTEX_BINDING_DIVISOR, GL_VERTEX_BINDING_OFFSET,
1304 GL_VERTEX_BINDING_STRIDE, GL_MAX_VERTEX_ATTRIB_RELATIVE_OFFSET and
1305 GL_MAX_VERTEX_ATTRIB_BINDINGS are available only if the GL version is
1306 4.3 or greater.
1307
1309 GL_INVALID_ENUM is generated if pname is not an accepted value.
1310 GL_INVALID_VALUE is generated on any of glGetBooleani_v,
1312 glGetIntegeri_v, or glGetInteger64i_v if index is outside of the valid
1313 range for the indexed state target.
1314
1316 ┌──────────────────┬───────────────────────────────────────────────────────────────────────┐
1317 │ │ OpenGL Version │
1318 ├──────────────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
1319 │Function │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
1320 │/ │ │ │ │ │ │ │ │ │ │ │ │ │
1321 │Feature │ │ │ │ │ │ │ │ │ │ │ │ │
1322 │Name │ │ │ │ │ │ │ │ │ │ │ │ │
1323 ├──────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
1324 │glGetBooleani_v │ - │ - │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
1325 ├──────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
1326 │glGetBooleanv │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
1327 ├──────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
1328 │glGetDoublei_v │ - │ - │ - │ - │ - │ - │ - │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
1329 ├──────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
1330 │glGetDoublev │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
1331 ├──────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
1332 │glGetFloati_v │ - │ - │ - │ - │ - │ - │ - │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
1333 ├──────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
1334 │glGetFloatv │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
1335 ├──────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
1336 │glGetInteger64i_v │ - │ - │ - │ - │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
1337 ├──────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
1338 │glGetInteger64v │ - │ - │ - │ - │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
1339 ├──────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
1340 │glGetIntegeri_v │ - │ - │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
1341 ├──────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
1342 │glGetIntegerv │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
1343 └──────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘
1344
1346 glGetActiveUniform(), glGetAttachedShaders(), glGetAttribLocation(),
1347 glGetBufferParameter(), glGetBufferPointerv(), glGetBufferSubData(),
1348 glGetCompressedTexImage(), glGetError(), glGetProgram(),
1349 glGetProgramInfoLog(), glGetQueryiv(), glGetQueryObject(),
1350 glGetShader(), glGetShaderInfoLog(), glGetShaderSource(),
1351 glGetString(), glGetTexImage(), glGetTexLevelParameter(),
1352 glGetTexParameter(), glGetUniform(), glGetUniformLocation(),
1353 glGetVertexAttrib(), glGetVertexAttribPointerv(), glIsEnabled()
1354
1356 Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2014
1357 Khronos Group. This document is licensed under the SGI Free Software B
1358 License. For details, see http://oss.sgi.com/projects/FreeB/.
1359
1361 Copyright © 1991-2006 Silicon Graphics, Inc.
1362 Copyright © 2010-2014 Khronos Group
1363[FIXME: source] 03/06/2019 GLGET(3G)