1GLGET(3G) OpenGL Manual GLGET(3G)
2
6 glGet - return the value or values of a selected parameter
7
9 void glGetBooleanv(GLenum pname, GLboolean * params);
10
12 void glGetDoublev(GLenum pname, GLdouble * params);
13
15 void glGetFloatv(GLenum pname, GLfloat * params);
16
18 void glGetIntegerv(GLenum pname, GLint * params);
19
21 void glGetInteger64v(GLenum pname, GLint64 * params);
22
24 pname
25 Specifies the parameter value to be returned. The symbolic
26 constants in the list below are accepted.
27 params
29 Returns the value or values of the specified parameter.
30
32 void glGetBooleani_v(GLenum pname, GLuint index, GLboolean * data);
33
35 void glGetIntegeri_v(GLenum pname, GLuint index, GLint * data);
36
38 void glGetFloati_v(GLenum pname, GLuint index, GLfloat * data);
39
41 void glGetDoublei_v(GLenum pname, GLuint index, GLdouble * data);
42
44 void glGetInteger64i_v(GLenum pname, GLuint index, GLint64 * data);
45
47 pname
48 Specifies the parameter value to be returned. The symbolic
49 constants in the list below are accepted.
50 index
52 Specifies the index of the particular element being queried.
53 data
55 Returns the value or values of the specified parameter.
56
58 These four commands return values for simple state variables in GL.
59 pname is a symbolic constant indicating the state variable to be
60 returned, and params is a pointer to an array of the indicated type in
61 which to place the returned data.
62 Type conversion is performed if params has a different type than the
64 state variable value being requested. If glGetBooleanv is called, a
65 floating-point (or integer) value is converted to GL_FALSE if and only
66 if it is 0.0 (or 0). Otherwise, it is converted to GL_TRUE. If
67 glGetIntegerv is called, boolean values are returned as GL_TRUE or
68 GL_FALSE, and most floating-point values are rounded to the nearest
69 integer value. Floating-point colors and normals, however, are returned
70 with a linear mapping that maps 1.0 to the most positive representable
71 integer value and -1.0 to the most negative representable integer
72 value. If glGetFloatv or glGetDoublev is called, boolean values are
73 returned as GL_TRUE or GL_FALSE, and integer values are converted to
74 floating-point values.
75 The following symbolic constants are accepted by pname:
77 GL_ACTIVE_TEXTURE
79 params returns a single value indicating the active multitexture
81 unit. The initial value is GL_TEXTURE0. See glActiveTexture().
82 GL_ALIASED_LINE_WIDTH_RANGE
84 params returns a pair of values indicating the range of widths
86 supported for aliased lines. See glLineWidth().
87 GL_ARRAY_BUFFER_BINDING
89 params returns a single value, the name of the buffer object
91 currently bound to the target GL_ARRAY_BUFFER. If no buffer object
92 is bound to this target, 0 is returned. The initial value is 0. See
93 glBindBuffer().
94 GL_BLEND
96 params returns a single boolean value indicating whether blending
98 is enabled. The initial value is GL_FALSE. See glBlendFunc().
99 GL_BLEND_COLOR
101 params returns four values, the red, green, blue, and alpha values
103 which are the components of the blend color. See glBlendColor().
104 GL_BLEND_DST_ALPHA
106 params returns one value, the symbolic constant identifying the
108 alpha destination blend function. The initial value is GL_ZERO. See
109 glBlendFunc() and glBlendFuncSeparate().
110 GL_BLEND_DST_RGB
112 params returns one value, the symbolic constant identifying the RGB
114 destination blend function. The initial value is GL_ZERO. See
115 glBlendFunc() and glBlendFuncSeparate().
116 GL_BLEND_EQUATION_RGB
118 params returns one value, a symbolic constant indicating whether
120 the RGB blend equation is GL_FUNC_ADD, GL_FUNC_SUBTRACT,
121 GL_FUNC_REVERSE_SUBTRACT, GL_MIN or GL_MAX. See
122 glBlendEquationSeparate().
123 GL_BLEND_EQUATION_ALPHA
125 params returns one value, a symbolic constant indicating whether
127 the Alpha blend equation is GL_FUNC_ADD, GL_FUNC_SUBTRACT,
128 GL_FUNC_REVERSE_SUBTRACT, GL_MIN or GL_MAX. See
129 glBlendEquationSeparate().
130 GL_BLEND_SRC_ALPHA
132 params returns one value, the symbolic constant identifying the
134 alpha source blend function. The initial value is GL_ONE. See
135 glBlendFunc() and glBlendFuncSeparate().
136 GL_BLEND_SRC_RGB
138 params returns one value, the symbolic constant identifying the RGB
140 source blend function. The initial value is GL_ONE. See
141 glBlendFunc() and glBlendFuncSeparate().
142 GL_COLOR_CLEAR_VALUE
144 params returns four values: the red, green, blue, and alpha values
146 used to clear the color buffers. Integer values, if requested, are
147 linearly mapped from the internal floating-point representation
148 such that 1.0 returns the most positive representable integer
149 value, and -1.0 returns the most negative representable integer
150 value. The initial value is (0, 0, 0, 0). See glClearColor().
151 GL_COLOR_LOGIC_OP
153 params returns a single boolean value indicating whether a
155 fragment's RGBA color values are merged into the framebuffer using
156 a logical operation. The initial value is GL_FALSE. See
157 glLogicOp().
158 GL_COLOR_WRITEMASK
160 params returns four boolean values: the red, green, blue, and alpha
162 write enables for the color buffers. The initial value is (GL_TRUE,
163 GL_TRUE, GL_TRUE, GL_TRUE). See glColorMask().
164 GL_COMPRESSED_TEXTURE_FORMATS
166 params returns a list of symbolic constants of length
168 GL_NUM_COMPRESSED_TEXTURE_FORMATS indicating which compressed
169 texture formats are available. See glCompressedTexImage2D().
170 GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS
172 params returns one value, the maximum number of active shader
174 storage blocks that may be accessed by a compute shader.
175 GL_MAX_COMBINED_SHADER_STORAGE_BLOCKS
177 params returns one value, the maximum total number of active shader
179 storage blocks that may be accessed by all active shaders.
180 GL_MAX_COMPUTE_UNIFORM_BLOCKS
182 params returns one value, the maximum number of uniform blocks per
184 compute shader. The value must be at least 14. See
185 glUniformBlockBinding().
186 GL_MAX_COMPUTE_TEXTURE_IMAGE_UNITS
188 params returns one value, the maximum supported texture image units
190 that can be used to access texture maps from the compute shader.
191 The value may be at least 16. See glActiveTexture().
192 GL_MAX_COMPUTE_UNIFORM_COMPONENTS
194 params returns one value, the maximum number of individual
196 floating-point, integer, or boolean values that can be held in
197 uniform variable storage for a compute shader. The value must be at
198 least 1024. See glUniform().
199 GL_MAX_COMPUTE_ATOMIC_COUNTERS
201 params returns a single value, the maximum number of atomic
203 counters available to compute shaders.
204 GL_MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS
206 params returns a single value, the maximum number of atomic counter
208 buffers that may be accessed by a compute shader.
209 GL_MAX_COMBINED_COMPUTE_UNIFORM_COMPONENTS
211 params returns one value, the number of words for compute shader
213 uniform variables in all uniform blocks (including default). The
214 value must be at least 1. See glUniform().
215 GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS
217 params returns one value, the number of invocations in a single
219 local work group (i.e., the product of the three dimensions) that
220 may be dispatched to a compute shader.
221 GL_MAX_COMPUTE_WORK_GROUP_COUNT
223 Accepted by the indexed versions of glGet. params the maximum
225 number of work groups that may be dispatched to a compute shader.
226 Indices 0, 1, and 2 correspond to the X, Y and Z dimensions,
227 respectively.
228 GL_MAX_COMPUTE_WORK_GROUP_SIZE
230 Accepted by the indexed versions of glGet. params the maximum size
232 of a work groups that may be used during compilation of a compute
233 shader. Indices 0, 1, and 2 correspond to the X, Y and Z
234 dimensions, respectively.
235 GL_DISPATCH_INDIRECT_BUFFER_BINDING
237 params returns a single value, the name of the buffer object
239 currently bound to the target GL_DISPATCH_INDIRECT_BUFFER. If no
240 buffer object is bound to this target, 0 is returned. The initial
241 value is 0. See glBindBuffer().
242 GL_MAX_DEBUG_GROUP_STACK_DEPTH
244 params returns a single value, the maximum depth of the debug
246 message group stack.
247 GL_DEBUG_GROUP_STACK_DEPTH
249 params returns a single value, the current depth of the debug
251 message group stack.
252 GL_CONTEXT_FLAGS
254 params returns one value, the flags with which the context was
256 created (such as debugging functionality).
257 GL_CULL_FACE
259 params returns a single boolean value indicating whether polygon
261 culling is enabled. The initial value is GL_FALSE. See
262 glCullFace().
263 GL_CURRENT_PROGRAM
265 params returns one value, the name of the program object that is
267 currently active, or 0 if no program object is active. See
268 glUseProgram().
269 GL_DEPTH_CLEAR_VALUE
271 params returns one value, the value that is used to clear the depth
273 buffer. Integer values, if requested, are linearly mapped from the
274 internal floating-point representation such that 1.0 returns the
275 most positive representable integer value, and -1.0 returns the
276 most negative representable integer value. The initial value is 1.
277 See glClearDepth().
278 GL_DEPTH_FUNC
280 params returns one value, the symbolic constant that indicates the
282 depth comparison function. The initial value is GL_LESS. See
283 glDepthFunc().
284 GL_DEPTH_RANGE
286 params returns two values: the near and far mapping limits for the
288 depth buffer. Integer values, if requested, are linearly mapped
289 from the internal floating-point representation such that 1.0
290 returns the most positive representable integer value, and -1.0
291 returns the most negative representable integer value. The initial
292 value is (0, 1). See glDepthRange().
293 GL_DEPTH_TEST
295 params returns a single boolean value indicating whether depth
297 testing of fragments is enabled. The initial value is GL_FALSE. See
298 glDepthFunc() and glDepthRange().
299 GL_DEPTH_WRITEMASK
301 params returns a single boolean value indicating if the depth
303 buffer is enabled for writing. The initial value is GL_TRUE. See
304 glDepthMask().
305 GL_DITHER
307 params returns a single boolean value indicating whether dithering
309 of fragment colors and indices is enabled. The initial value is
310 GL_TRUE.
311 GL_DOUBLEBUFFER
313 params returns a single boolean value indicating whether double
315 buffering is supported.
316 GL_DRAW_BUFFER
318 params returns one value, a symbolic constant indicating which
320 buffers are being drawn to. See glDrawBuffer(). The initial value
321 is GL_BACK if there are back buffers, otherwise it is GL_FRONT.
322 GL_DRAW_BUFFERi
324 params returns one value, a symbolic constant indicating which
326 buffers are being drawn to by the corresponding output color. See
327 glDrawBuffers(). The initial value of GL_DRAW_BUFFER0 is GL_BACK if
328 there are back buffers, otherwise it is GL_FRONT. The initial
329 values of draw buffers for all other output colors is GL_NONE.
330 GL_DRAW_FRAMEBUFFER_BINDING
332 params returns one value, the name of the framebuffer object
334 currently bound to the GL_DRAW_FRAMEBUFFER target. If the default
335 framebuffer is bound, this value will be zero. The initial value is
336 zero. See glBindFramebuffer().
337 GL_READ_FRAMEBUFFER_BINDING
339 params returns one value, the name of the framebuffer object
341 currently bound to the GL_READ_FRAMEBUFFER target. If the default
342 framebuffer is bound, this value will be zero. The initial value is
343 zero. See glBindFramebuffer().
344 GL_ELEMENT_ARRAY_BUFFER_BINDING
346 params returns a single value, the name of the buffer object
348 currently bound to the target GL_ELEMENT_ARRAY_BUFFER. If no buffer
349 object is bound to this target, 0 is returned. The initial value is
350 0. See glBindBuffer().
351 GL_FRAGMENT_SHADER_DERIVATIVE_HINT
353 params returns one value, a symbolic constant indicating the mode
355 of the derivative accuracy hint for fragment shaders. The initial
356 value is GL_DONT_CARE. See glHint().
357 GL_IMPLEMENTATION_COLOR_READ_FORMAT
359 params returns a single GLenum value indicating the
361 implementation's preferred pixel data format. See glReadPixels().
362 GL_IMPLEMENTATION_COLOR_READ_TYPE
364 params returns a single GLenum value indicating the
366 implementation's preferred pixel data type. See glReadPixels().
367 GL_LINE_SMOOTH
369 params returns a single boolean value indicating whether
371 antialiasing of lines is enabled. The initial value is GL_FALSE.
372 See glLineWidth().
373 GL_LINE_SMOOTH_HINT
375 params returns one value, a symbolic constant indicating the mode
377 of the line antialiasing hint. The initial value is GL_DONT_CARE.
378 See glHint().
379 GL_LINE_WIDTH
381 params returns one value, the line width as specified with
383 glLineWidth(). The initial value is 1.
384 GL_LAYER_PROVOKING_VERTEX
386 params returns one value, the implementation dependent specifc
388 vertex of a primitive that is used to select the rendering layer.
389 If the value returned is equivalent to GL_PROVOKING_VERTEX, then
390 the vertex selection follows the convention specified by
391 glProvokingVertex(). If the value returned is equivalent to
392 GL_FIRST_VERTEX_CONVENTION, then the selection is always taken from
393 the first vertex in the primitive. If the value returned is
394 equivalent to GL_LAST_VERTEX_CONVENTION, then the selection is
395 always taken from the last vertex in the primitive. If the value
396 returned is equivalent to GL_UNDEFINED_VERTEX, then the selection
397 is not guaranteed to be taken from any specific vertex in the
398 primitive.
399 GL_LINE_WIDTH_GRANULARITY
401 params returns one value, the width difference between adjacent
403 supported widths for antialiased lines. See glLineWidth().
404 GL_LINE_WIDTH_RANGE
406 params returns two values: the smallest and largest supported
408 widths for antialiased lines. See glLineWidth().
409 GL_LOGIC_OP_MODE
411 params returns one value, a symbolic constant indicating the
413 selected logic operation mode. The initial value is GL_COPY. See
414 glLogicOp().
415 GL_MAJOR_VERSION
417 params returns one value, the major version number of the OpenGL
419 API supported by the current context.
420 GL_MAX_3D_TEXTURE_SIZE
422 params returns one value, a rough estimate of the largest 3D
424 texture that the GL can handle. The value must be at least 64. Use
425 GL_PROXY_TEXTURE_3D to determine if a texture is too large. See
426 glTexImage3D().
427 GL_MAX_ARRAY_TEXTURE_LAYERS
429 params returns one value. The value indicates the maximum number of
431 layers allowed in an array texture, and must be at least 256. See
432 glTexImage2D().
433 GL_MAX_CLIP_DISTANCES
435 params returns one value, the maximum number of application-defined
437 clipping distances. The value must be at least 8.
438 GL_MAX_COLOR_TEXTURE_SAMPLES
440 params returns one value, the maximum number of samples in a color
442 multisample texture.
443 GL_MAX_COMBINED_ATOMIC_COUNTERS
445 params returns a single value, the maximum number of atomic
447 counters available to all active shaders.
448 GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS
450 params returns one value, the number of words for fragment shader
452 uniform variables in all uniform blocks (including default). The
453 value must be at least 1. See glUniform().
454 GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS
456 params returns one value, the number of words for geometry shader
458 uniform variables in all uniform blocks (including default). The
459 value must be at least 1. See glUniform().
460 GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS
462 params returns one value, the maximum supported texture image units
464 that can be used to access texture maps from the vertex shader and
465 the fragment processor combined. If both the vertex shader and the
466 fragment processing stage access the same texture image unit, then
467 that counts as using two texture image units against this limit.
468 The value must be at least 48. See glActiveTexture().
469 GL_MAX_COMBINED_UNIFORM_BLOCKS
471 params returns one value, the maximum number of uniform blocks per
473 program. The value must be at least 36. See
474 glUniformBlockBinding().
475 GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS
477 params returns one value, the number of words for vertex shader
479 uniform variables in all uniform blocks (including default). The
480 value must be at least 1. See glUniform().
481 GL_MAX_CUBE_MAP_TEXTURE_SIZE
483 params returns one value. The value gives a rough estimate of the
485 largest cube-map texture that the GL can handle. The value must be
486 at least 1024. Use GL_PROXY_TEXTURE_CUBE_MAP to determine if a
487 texture is too large. See glTexImage2D().
488 GL_MAX_DEPTH_TEXTURE_SAMPLES
490 params returns one value, the maximum number of samples in a
492 multisample depth or depth-stencil texture.
493 GL_MAX_DRAW_BUFFERS
495 params returns one value, the maximum number of simultaneous
497 outputs that may be written in a fragment shader. The value must be
498 at least 8. See glDrawBuffers().
499 GL_MAX_DUALSOURCE_DRAW_BUFFERS
501 params returns one value, the maximum number of active draw buffers
503 when using dual-source blending. The value must be at least 1. See
504 glBlendFunc() and glBlendFuncSeparate().
505 GL_MAX_ELEMENTS_INDICES
507 params returns one value, the recommended maximum number of vertex
509 array indices. See glDrawRangeElements().
510 GL_MAX_ELEMENTS_VERTICES
512 params returns one value, the recommended maximum number of vertex
514 array vertices. See glDrawRangeElements().
515 GL_MAX_FRAGMENT_ATOMIC_COUNTERS
517 params returns a single value, the maximum number of atomic
519 counters available to fragment shaders.
520 GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS
522 params returns one value, the maximum number of active shader
524 storage blocks that may be accessed by a fragment shader.
525 GL_MAX_FRAGMENT_INPUT_COMPONENTS
527 params returns one value, the maximum number of components of the
529 inputs read by the fragment shader, which must be at least 128.
530 GL_MAX_FRAGMENT_UNIFORM_COMPONENTS
532 params returns one value, the maximum number of individual
534 floating-point, integer, or boolean values that can be held in
535 uniform variable storage for a fragment shader. The value must be
536 at least 1024. See glUniform().
537 GL_MAX_FRAGMENT_UNIFORM_VECTORS
539 params returns one value, the maximum number of individual
541 4-vectors of floating-point, integer, or boolean values that can be
542 held in uniform variable storage for a fragment shader. The value
543 is equal to the value of GL_MAX_FRAGMENT_UNIFORM_COMPONENTS divided
544 by 4 and must be at least 256. See glUniform().
545 GL_MAX_FRAGMENT_UNIFORM_BLOCKS
547 params returns one value, the maximum number of uniform blocks per
549 fragment shader. The value must be at least 12. See
550 glUniformBlockBinding().
551 GL_MAX_FRAMEBUFFER_WIDTH
553 params returns one value, the maximum width for a framebuffer that
555 has no attachments, which must be at least 16384. See
556 glFramebufferParameter().
557 GL_MAX_FRAMEBUFFER_HEIGHT
559 params returns one value, the maximum height for a framebuffer that
561 has no attachments, which must be at least 16384. See
562 glFramebufferParameter().
563 GL_MAX_FRAMEBUFFER_LAYERS
565 params returns one value, the maximum number of layers for a
567 framebuffer that has no attachments, which must be at least 2048.
568 See glFramebufferParameter().
569 GL_MAX_FRAMEBUFFER_SAMPLES
571 params returns one value, the maximum samples in a framebuffer that
573 has no attachments, which must be at least 4. See
574 glFramebufferParameter().
575 GL_MAX_GEOMETRY_ATOMIC_COUNTERS
577 params returns a single value, the maximum number of atomic
579 counters available to geometry shaders.
580 GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS
582 params returns one value, the maximum number of active shader
584 storage blocks that may be accessed by a geometry shader.
585 GL_MAX_GEOMETRY_INPUT_COMPONENTS
587 params returns one value, the maximum number of components of
589 inputs read by a geometry shader, which must be at least 64.
590 GL_MAX_GEOMETRY_OUTPUT_COMPONENTS
592 params returns one value, the maximum number of components of
594 outputs written by a geometry shader, which must be at least 128.
595 GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS
597 params returns one value, the maximum supported texture image units
599 that can be used to access texture maps from the geometry shader.
600 The value must be at least 16. See glActiveTexture().
601 GL_MAX_GEOMETRY_UNIFORM_BLOCKS
603 params returns one value, the maximum number of uniform blocks per
605 geometry shader. The value must be at least 12. See
606 glUniformBlockBinding().
607 GL_MAX_GEOMETRY_UNIFORM_COMPONENTS
609 params returns one value, the maximum number of individual
611 floating-point, integer, or boolean values that can be held in
612 uniform variable storage for a geometry shader. The value must be
613 at least 1024. See glUniform().
614 GL_MAX_INTEGER_SAMPLES
616 params returns one value, the maximum number of samples supported
618 in integer format multisample buffers.
619 GL_MIN_MAP_BUFFER_ALIGNMENT
621 params returns one value, the minimum alignment in basic machine
623 units of pointers returned fromglMapBuffer() and
624 glMapBufferRange(). This value must be a power of two and must be
625 at least 64.
626 GL_MAX_LABEL_LENGTH
628 params returns one value, the maximum length of a label that may be
630 assigned to an object. See glObjectLabel() and glObjectPtrLabel().
631 GL_MAX_PROGRAM_TEXEL_OFFSET
633 params returns one value, the maximum texel offset allowed in a
635 texture lookup, which must be at least 7.
636 GL_MIN_PROGRAM_TEXEL_OFFSET
638 params returns one value, the minimum texel offset allowed in a
640 texture lookup, which must be at most -8.
641 GL_MAX_RECTANGLE_TEXTURE_SIZE
643 params returns one value. The value gives a rough estimate of the
645 largest rectangular texture that the GL can handle. The value must
646 be at least 1024. Use GL_PROXY_RECTANGLE_TEXTURE to determine if a
647 texture is too large. See glTexImage2D().
648 GL_MAX_RENDERBUFFER_SIZE
650 params returns one value. The value indicates the maximum supported
652 size for renderbuffers. See glFramebufferRenderbuffer().
653 GL_MAX_SAMPLE_MASK_WORDS
655 params returns one value, the maximum number of sample mask words.
657 GL_MAX_SERVER_WAIT_TIMEOUT
659 params returns one value, the maximum glWaitSync() timeout
661 interval.
662 GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS
664 params returns one value, the maximum number of shader storage
666 buffer binding points on the context, which must be at least 8.
667 GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS
669 params returns a single value, the maximum number of atomic
671 counters available to tessellation control shaders.
672 GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS
674 params returns a single value, the maximum number of atomic
676 counters available to tessellation evaluation shaders.
677 GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS
679 params returns one value, the maximum number of active shader
681 storage blocks that may be accessed by a tessellation control
682 shader.
683 GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS
685 params returns one value, the maximum number of active shader
687 storage blocks that may be accessed by a tessellation evaluation
688 shader.
689 GL_MAX_TEXTURE_BUFFER_SIZE
691 params returns one value. The value gives the maximum number of
693 texels allowed in the texel array of a texture buffer object. Value
694 must be at least 65536.
695 GL_MAX_TEXTURE_IMAGE_UNITS
697 params returns one value, the maximum supported texture image units
699 that can be used to access texture maps from the fragment shader.
700 The value must be at least 16. See glActiveTexture().
701 GL_MAX_TEXTURE_LOD_BIAS
703 params returns one value, the maximum, absolute value of the
705 texture level-of-detail bias. The value must be at least 2.0.
706 GL_MAX_TEXTURE_SIZE
708 params returns one value. The value gives a rough estimate of the
710 largest texture that the GL can handle. The value must be at least
711 1024. Use a proxy texture target such as GL_PROXY_TEXTURE_1D or
712 GL_PROXY_TEXTURE_2D to determine if a texture is too large. See
713 glTexImage1D() and glTexImage2D().
714 GL_MAX_UNIFORM_BUFFER_BINDINGS
716 params returns one value, the maximum number of uniform buffer
718 binding points on the context, which must be at least 36.
719 GL_MAX_UNIFORM_BLOCK_SIZE
721 params returns one value, the maximum size in basic machine units
723 of a uniform block, which must be at least 16384.
724 GL_MAX_UNIFORM_LOCATIONS
726 params returns one value, the maximum number of explicitly
728 assignable uniform locations, which must be at least 1024.
729 GL_MAX_VARYING_COMPONENTS
731 params returns one value, the number components for varying
733 variables, which must be at least 60.
734 GL_MAX_VARYING_VECTORS
736 params returns one value, the number 4-vectors for varying
738 variables, which is equal to the value of GL_MAX_VARYING_COMPONENTS
739 and must be at least 15.
740 GL_MAX_VARYING_FLOATS
742 params returns one value, the maximum number of interpolators
744 available for processing varying variables used by vertex and
745 fragment shaders. This value represents the number of individual
746 floating-point values that can be interpolated; varying variables
747 declared as vectors, matrices, and arrays will all consume multiple
748 interpolators. The value must be at least 32.
749 GL_MAX_VERTEX_ATOMIC_COUNTERS
751 params returns a single value, the maximum number of atomic
753 counters available to vertex shaders.
754 GL_MAX_VERTEX_ATTRIBS
756 params returns one value, the maximum number of 4-component generic
758 vertex attributes accessible to a vertex shader. The value must be
759 at least 16. See glVertexAttrib().
760 GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS
762 params returns one value, the maximum number of active shader
764 storage blocks that may be accessed by a vertex shader.
765 GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS
767 params returns one value, the maximum supported texture image units
769 that can be used to access texture maps from the vertex shader. The
770 value may be at least 16. See glActiveTexture().
771 GL_MAX_VERTEX_UNIFORM_COMPONENTS
773 params returns one value, the maximum number of individual
775 floating-point, integer, or boolean values that can be held in
776 uniform variable storage for a vertex shader. The value must be at
777 least 1024. See glUniform().
778 GL_MAX_VERTEX_UNIFORM_VECTORS
780 params returns one value, the maximum number of 4-vectors that may
782 be held in uniform variable storage for the vertex shader. The
783 value of GL_MAX_VERTEX_UNIFORM_VECTORS is equal to the value of
784 GL_MAX_VERTEX_UNIFORM_COMPONENTS and must be at least 256.
785 GL_MAX_VERTEX_OUTPUT_COMPONENTS
787 params returns one value, the maximum number of components of
789 output written by a vertex shader, which must be at least 64.
790 GL_MAX_VERTEX_UNIFORM_BLOCKS
792 params returns one value, the maximum number of uniform blocks per
794 vertex shader. The value must be at least 12. See
795 glUniformBlockBinding().
796 GL_MAX_VIEWPORT_DIMS
798 params returns two values: the maximum supported width and height
800 of the viewport. These must be at least as large as the visible
801 dimensions of the display being rendered to. See glViewport().
802 GL_MAX_VIEWPORTS
804 params returns one value, the maximum number of simultaneous
806 viewports that are supported. The value must be at least 16. See
807 glViewportIndexed().
808 GL_MINOR_VERSION
810 params returns one value, the minor version number of the OpenGL
812 API supported by the current context.
813 GL_NUM_COMPRESSED_TEXTURE_FORMATS
815 params returns a single integer value indicating the number of
817 available compressed texture formats. The minimum value is 4. See
818 glCompressedTexImage2D().
819 GL_NUM_EXTENSIONS
821 params returns one value, the number of extensions supported by the
823 GL implementation for the current context. See glGetString().
824 GL_NUM_PROGRAM_BINARY_FORMATS
826 params returns one value, the number of program binary formats
828 supported by the implementation.
829 GL_NUM_SHADER_BINARY_FORMATS
831 params returns one value, the number of binary shader formats
833 supported by the implementation. If this value is greater than
834 zero, then the implementation supports loading binary shaders. If
835 it is zero, then the loading of binary shaders by the
836 implementation is not supported.
837 GL_PACK_ALIGNMENT
839 params returns one value, the byte alignment used for writing pixel
841 data to memory. The initial value is 4. See glPixelStore().
842 GL_PACK_IMAGE_HEIGHT
844 params returns one value, the image height used for writing pixel
846 data to memory. The initial value is 0. See glPixelStore().
847 GL_PACK_LSB_FIRST
849 params returns a single boolean value indicating whether single-bit
851 pixels being written to memory are written first to the least
852 significant bit of each unsigned byte. The initial value is
853 GL_FALSE. See glPixelStore().
854 GL_PACK_ROW_LENGTH
856 params returns one value, the row length used for writing pixel
858 data to memory. The initial value is 0. See glPixelStore().
859 GL_PACK_SKIP_IMAGES
861 params returns one value, the number of pixel images skipped before
863 the first pixel is written into memory. The initial value is 0. See
864 glPixelStore().
865 GL_PACK_SKIP_PIXELS
867 params returns one value, the number of pixel locations skipped
869 before the first pixel is written into memory. The initial value is
870 0. See glPixelStore().
871 GL_PACK_SKIP_ROWS
873 params returns one value, the number of rows of pixel locations
875 skipped before the first pixel is written into memory. The initial
876 value is 0. See glPixelStore().
877 GL_PACK_SWAP_BYTES
879 params returns a single boolean value indicating whether the bytes
881 of two-byte and four-byte pixel indices and components are swapped
882 before being written to memory. The initial value is GL_FALSE. See
883 glPixelStore().
884 GL_PIXEL_PACK_BUFFER_BINDING
886 params returns a single value, the name of the buffer object
888 currently bound to the target GL_PIXEL_PACK_BUFFER. If no buffer
889 object is bound to this target, 0 is returned. The initial value is
890 0. See glBindBuffer().
891 GL_PIXEL_UNPACK_BUFFER_BINDING
893 params returns a single value, the name of the buffer object
895 currently bound to the target GL_PIXEL_UNPACK_BUFFER. If no buffer
896 object is bound to this target, 0 is returned. The initial value is
897 0. See glBindBuffer().
898 GL_POINT_FADE_THRESHOLD_SIZE
900 params returns one value, the point size threshold for determining
902 the point size. See glPointParameter().
903 GL_PRIMITIVE_RESTART_INDEX
905 params returns one value, the current primitive restart index. The
907 initial value is 0. See glPrimitiveRestartIndex().
908 GL_PROGRAM_BINARY_FORMATS
910 params an array of GL_NUM_PROGRAM_BINARY_FORMATS values, indicating
912 the proram binary formats supported by the implementation.
913 GL_PROGRAM_PIPELINE_BINDING
915 params a single value, the name of the currently bound program
917 pipeline object, or zero if no program pipeline object is bound.
918 See glBindProgramPipeline().
919 GL_PROVOKING_VERTEX
921 params returns one value, the currently selected provoking vertex
923 convention. The initial value is GL_LAST_VERTEX_CONVENTION. See
924 glProvokingVertex().
925 GL_POINT_SIZE
927 params returns one value, the point size as specified by
929 glPointSize(). The initial value is 1.
930 GL_POINT_SIZE_GRANULARITY
932 params returns one value, the size difference between adjacent
934 supported sizes for antialiased points. See glPointSize().
935 GL_POINT_SIZE_RANGE
937 params returns two values: the smallest and largest supported sizes
939 for antialiased points. The smallest size must be at most 1, and
940 the largest size must be at least 1. See glPointSize().
941 GL_POLYGON_OFFSET_FACTOR
943 params returns one value, the scaling factor used to determine the
945 variable offset that is added to the depth value of each fragment
946 generated when a polygon is rasterized. The initial value is 0. See
947 glPolygonOffset().
948 GL_POLYGON_OFFSET_UNITS
950 params returns one value. This value is multiplied by an
952 implementation-specific value and then added to the depth value of
953 each fragment generated when a polygon is rasterized. The initial
954 value is 0. See glPolygonOffset().
955 GL_POLYGON_OFFSET_FILL
957 params returns a single boolean value indicating whether polygon
959 offset is enabled for polygons in fill mode. The initial value is
960 GL_FALSE. See glPolygonOffset().
961 GL_POLYGON_OFFSET_LINE
963 params returns a single boolean value indicating whether polygon
965 offset is enabled for polygons in line mode. The initial value is
966 GL_FALSE. See glPolygonOffset().
967 GL_POLYGON_OFFSET_POINT
969 params returns a single boolean value indicating whether polygon
971 offset is enabled for polygons in point mode. The initial value is
972 GL_FALSE. See glPolygonOffset().
973 GL_POLYGON_SMOOTH
975 params returns a single boolean value indicating whether
977 antialiasing of polygons is enabled. The initial value is GL_FALSE.
978 See glPolygonMode().
979 GL_POLYGON_SMOOTH_HINT
981 params returns one value, a symbolic constant indicating the mode
983 of the polygon antialiasing hint. The initial value is
984 GL_DONT_CARE. See glHint().
985 GL_READ_BUFFER
987 params returns one value, a symbolic constant indicating which
989 color buffer is selected for reading. The initial value is GL_BACK
990 if there is a back buffer, otherwise it is GL_FRONT. See
991 glReadPixels().
992 GL_RENDERBUFFER_BINDING
994 params returns a single value, the name of the renderbuffer object
996 currently bound to the target GL_RENDERBUFFER. If no renderbuffer
997 object is bound to this target, 0 is returned. The initial value is
998 0. See glBindRenderbuffer().
999 GL_SAMPLE_BUFFERS
1001 params returns a single integer value indicating the number of
1003 sample buffers associated with the framebuffer. See
1004 glSampleCoverage().
1005 GL_SAMPLE_COVERAGE_VALUE
1007 params returns a single positive floating-point value indicating
1009 the current sample coverage value. See glSampleCoverage().
1010 GL_SAMPLE_COVERAGE_INVERT
1012 params returns a single boolean value indicating if the temporary
1014 coverage value should be inverted. See glSampleCoverage().
1015 GL_SAMPLER_BINDING
1017 params returns a single value, the name of the sampler object
1019 currently bound to the active texture unit. The initial value is 0.
1020 See glBindSampler().
1021 GL_SAMPLES
1023 params returns a single integer value indicating the coverage mask
1025 size. See glSampleCoverage().
1026 GL_SCISSOR_BOX
1028 params returns four values: the x and y window coordinates of the
1030 scissor box, followed by its width and height. Initially the x and
1031 y window coordinates are both 0 and the width and height are set to
1032 the size of the window. See glScissor().
1033 GL_SCISSOR_TEST
1035 params returns a single boolean value indicating whether scissoring
1037 is enabled. The initial value is GL_FALSE. See glScissor().
1038 GL_SHADER_COMPILER
1040 params returns a single boolean value indicating whether an online
1042 shader compiler is present in the implementation. All desktop
1043 OpenGL implementations must support online shader compilations, and
1044 therefore the value of GL_SHADER_COMPILER will always be GL_TRUE.
1045 GL_SHADER_STORAGE_BUFFER_BINDING
1047 When used with non-indexed variants of glGet (such as
1049 glGetIntegerv), params returns a single value, the name of the
1050 buffer object currently bound to the target
1051 GL_SHADER_STORAGE_BUFFER. If no buffer object is bound to this
1052 target, 0 is returned. When used with indexed variants of glGet
1053 (such as glGetIntegeri_v), params returns a single value, the name
1054 of the buffer object bound to the indexed shader storage buffer
1055 binding points. The initial value is 0 for all targets. See
1056 glBindBuffer(), glBindBufferBase(), and glBindBufferRange().
1057 GL_SHADER_STORAGE_BUFFER_OFFSET_ALIGNMENT
1059 params returns a single value, the minimum required alignment for
1061 shader storage buffer sizes and offset. The initial value is 1. See
1062 glShaderStorateBlockBinding().
1063 GL_SHADER_STORAGE_BUFFER_START
1065 When used with indexed variants of glGet (such as
1067 glGetInteger64i_v), params returns a single value, the start offset
1068 of the binding range for each indexed shader storage buffer
1069 binding. The initial value is 0 for all bindings. See
1070 glBindBufferRange().
1071 GL_SHADER_STORAGE_BUFFER_SIZE
1073 When used with indexed variants of glGet (such as
1075 glGetInteger64i_v), params returns a single value, the size of the
1076 binding range for each indexed shader storage buffer binding. The
1077 initial value is 0 for all bindings. See glBindBufferRange().
1078 GL_SMOOTH_LINE_WIDTH_RANGE
1080 params returns a pair of values indicating the range of widths
1082 supported for smooth (antialiased) lines. See glLineWidth().
1083 GL_SMOOTH_LINE_WIDTH_GRANULARITY
1085 params returns a single value indicating the level of quantization
1087 applied to smooth line width parameters.
1088 GL_STENCIL_BACK_FAIL
1090 params returns one value, a symbolic constant indicating what
1092 action is taken for back-facing polygons when the stencil test
1093 fails. The initial value is GL_KEEP. See glStencilOpSeparate().
1094 GL_STENCIL_BACK_FUNC
1096 params returns one value, a symbolic constant indicating what
1098 function is used for back-facing polygons to compare the stencil
1099 reference value with the stencil buffer value. The initial value is
1100 GL_ALWAYS. See glStencilFuncSeparate().
1101 GL_STENCIL_BACK_PASS_DEPTH_FAIL
1103 params returns one value, a symbolic constant indicating what
1105 action is taken for back-facing polygons when the stencil test
1106 passes, but the depth test fails. The initial value is GL_KEEP. See
1107 glStencilOpSeparate().
1108 GL_STENCIL_BACK_PASS_DEPTH_PASS
1110 params returns one value, a symbolic constant indicating what
1112 action is taken for back-facing polygons when the stencil test
1113 passes and the depth test passes. The initial value is GL_KEEP. See
1114 glStencilOpSeparate().
1115 GL_STENCIL_BACK_REF
1117 params returns one value, the reference value that is compared with
1119 the contents of the stencil buffer for back-facing polygons. The
1120 initial value is 0. See glStencilFuncSeparate().
1121 GL_STENCIL_BACK_VALUE_MASK
1123 params returns one value, the mask that is used for back-facing
1125 polygons to mask both the stencil reference value and the stencil
1126 buffer value before they are compared. The initial value is all
1127 1's. See glStencilFuncSeparate().
1128 GL_STENCIL_BACK_WRITEMASK
1130 params returns one value, the mask that controls writing of the
1132 stencil bitplanes for back-facing polygons. The initial value is
1133 all 1's. See glStencilMaskSeparate().
1134 GL_STENCIL_CLEAR_VALUE
1136 params returns one value, the index to which the stencil bitplanes
1138 are cleared. The initial value is 0. See glClearStencil().
1139 GL_STENCIL_FAIL
1141 params returns one value, a symbolic constant indicating what
1143 action is taken when the stencil test fails. The initial value is
1144 GL_KEEP. See glStencilOp(). This stencil state only affects
1145 non-polygons and front-facing polygons. Back-facing polygons use
1146 separate stencil state. See glStencilOpSeparate().
1147 GL_STENCIL_FUNC
1149 params returns one value, a symbolic constant indicating what
1151 function is used to compare the stencil reference value with the
1152 stencil buffer value. The initial value is GL_ALWAYS. See
1153 glStencilFunc(). This stencil state only affects non-polygons and
1154 front-facing polygons. Back-facing polygons use separate stencil
1155 state. See glStencilFuncSeparate().
1156 GL_STENCIL_PASS_DEPTH_FAIL
1158 params returns one value, a symbolic constant indicating what
1160 action is taken when the stencil test passes, but the depth test
1161 fails. The initial value is GL_KEEP. See glStencilOp(). This
1162 stencil state only affects non-polygons and front-facing polygons.
1163 Back-facing polygons use separate stencil state. See
1164 glStencilOpSeparate().
1165 GL_STENCIL_PASS_DEPTH_PASS
1167 params returns one value, a symbolic constant indicating what
1169 action is taken when the stencil test passes and the depth test
1170 passes. The initial value is GL_KEEP. See glStencilOp(). This
1171 stencil state only affects non-polygons and front-facing polygons.
1172 Back-facing polygons use separate stencil state. See
1173 glStencilOpSeparate().
1174 GL_STENCIL_REF
1176 params returns one value, the reference value that is compared with
1178 the contents of the stencil buffer. The initial value is 0. See
1179 glStencilFunc(). This stencil state only affects non-polygons and
1180 front-facing polygons. Back-facing polygons use separate stencil
1181 state. See glStencilFuncSeparate().
1182 GL_STENCIL_TEST
1184 params returns a single boolean value indicating whether stencil
1186 testing of fragments is enabled. The initial value is GL_FALSE. See
1187 glStencilFunc() and glStencilOp().
1188 GL_STENCIL_VALUE_MASK
1190 params returns one value, the mask that is used to mask both the
1192 stencil reference value and the stencil buffer value before they
1193 are compared. The initial value is all 1's. See glStencilFunc().
1194 This stencil state only affects non-polygons and front-facing
1195 polygons. Back-facing polygons use separate stencil state. See
1196 glStencilFuncSeparate().
1197 GL_STENCIL_WRITEMASK
1199 params returns one value, the mask that controls writing of the
1201 stencil bitplanes. The initial value is all 1's. See
1202 glStencilMask(). This stencil state only affects non-polygons and
1203 front-facing polygons. Back-facing polygons use separate stencil
1204 state. See glStencilMaskSeparate().
1205 GL_STEREO
1207 params returns a single boolean value indicating whether stereo
1209 buffers (left and right) are supported.
1210 GL_SUBPIXEL_BITS
1212 params returns one value, an estimate of the number of bits of
1214 subpixel resolution that are used to position rasterized geometry
1215 in window coordinates. The value must be at least 4.
1216 GL_TEXTURE_BINDING_1D
1218 params returns a single value, the name of the texture currently
1220 bound to the target GL_TEXTURE_1D. The initial value is 0. See
1221 glBindTexture().
1222 GL_TEXTURE_BINDING_1D_ARRAY
1224 params returns a single value, the name of the texture currently
1226 bound to the target GL_TEXTURE_1D_ARRAY. The initial value is 0.
1227 See glBindTexture().
1228 GL_TEXTURE_BINDING_2D
1230 params returns a single value, the name of the texture currently
1232 bound to the target GL_TEXTURE_2D. The initial value is 0. See
1233 glBindTexture().
1234 GL_TEXTURE_BINDING_2D_ARRAY
1236 params returns a single value, the name of the texture currently
1238 bound to the target GL_TEXTURE_2D_ARRAY. The initial value is 0.
1239 See glBindTexture().
1240 GL_TEXTURE_BINDING_2D_MULTISAMPLE
1242 params returns a single value, the name of the texture currently
1244 bound to the target GL_TEXTURE_2D_MULTISAMPLE. The initial value is
1245 0. See glBindTexture().
1246 GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY
1248 params returns a single value, the name of the texture currently
1250 bound to the target GL_TEXTURE_2D_MULTISAMPLE_ARRAY. The initial
1251 value is 0. See glBindTexture().
1252 GL_TEXTURE_BINDING_3D
1254 params returns a single value, the name of the texture currently
1256 bound to the target GL_TEXTURE_3D. The initial value is 0. See
1257 glBindTexture().
1258 GL_TEXTURE_BINDING_BUFFER
1260 params returns a single value, the name of the texture currently
1262 bound to the target GL_TEXTURE_BUFFER. The initial value is 0. See
1263 glBindTexture().
1264 GL_TEXTURE_BINDING_CUBE_MAP
1266 params returns a single value, the name of the texture currently
1268 bound to the target GL_TEXTURE_CUBE_MAP. The initial value is 0.
1269 See glBindTexture().
1270 GL_TEXTURE_BINDING_RECTANGLE
1272 params returns a single value, the name of the texture currently
1274 bound to the target GL_TEXTURE_RECTANGLE. The initial value is 0.
1275 See glBindTexture().
1276 GL_TEXTURE_COMPRESSION_HINT
1278 params returns a single value indicating the mode of the texture
1280 compression hint. The initial value is GL_DONT_CARE.
1281 GL_TEXTURE_BUFFER_BINDING
1283 params returns a single value, the name of the buffer object
1285 currently bound to the GL_TEXTURE_BUFFER buffer binding point. The
1286 initial value is 0. See glBindBuffer().
1287 GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT
1289 params returns a single value, the minimum required alignment for
1291 texture buffer sizes and offset. The initial value is 1. See
1292 glUniformBlockBinding().
1293 GL_TIMESTAMP
1295 params returns a single value, the 64-bit value of the current GL
1297 time. See glQueryCounter().
1298 GL_TRANSFORM_FEEDBACK_BUFFER_BINDING
1300 When used with non-indexed variants of glGet (such as
1302 glGetIntegerv), params returns a single value, the name of the
1303 buffer object currently bound to the target
1304 GL_TRANSFORM_FEEDBACK_BUFFER. If no buffer object is bound to this
1305 target, 0 is returned. When used with indexed variants of glGet
1306 (such as glGetIntegeri_v), params returns a single value, the name
1307 of the buffer object bound to the indexed transform feedback
1308 attribute stream. The initial value is 0 for all targets. See
1309 glBindBuffer(), glBindBufferBase(), and glBindBufferRange().
1310 GL_TRANSFORM_FEEDBACK_BUFFER_START
1312 When used with indexed variants of glGet (such as
1314 glGetInteger64i_v), params returns a single value, the start offset
1315 of the binding range for each transform feedback attribute stream.
1316 The initial value is 0 for all streams. See glBindBufferRange().
1317 GL_TRANSFORM_FEEDBACK_BUFFER_SIZE
1319 When used with indexed variants of glGet (such as
1321 glGetInteger64i_v), params returns a single value, the size of the
1322 binding range for each transform feedback attribute stream. The
1323 initial value is 0 for all streams. See glBindBufferRange().
1324 GL_UNIFORM_BUFFER_BINDING
1326 When used with non-indexed variants of glGet (such as
1328 glGetIntegerv), params returns a single value, the name of the
1329 buffer object currently bound to the target GL_UNIFORM_BUFFER. If
1330 no buffer object is bound to this target, 0 is returned. When used
1331 with indexed variants of glGet (such as glGetIntegeri_v), params
1332 returns a single value, the name of the buffer object bound to the
1333 indexed uniform buffer binding point. The initial value is 0 for
1334 all targets. See glBindBuffer(), glBindBufferBase(), and
1335 glBindBufferRange().
1336 GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT
1338 params returns a single value, the minimum required alignment for
1340 uniform buffer sizes and offset. The initial value is 1. See
1341 glUniformBlockBinding().
1342 GL_UNIFORM_BUFFER_SIZE
1344 When used with indexed variants of glGet (such as
1346 glGetInteger64i_v), params returns a single value, the size of the
1347 binding range for each indexed uniform buffer binding. The initial
1348 value is 0 for all bindings. See glBindBufferRange().
1349 GL_UNIFORM_BUFFER_START
1351 When used with indexed variants of glGet (such as
1353 glGetInteger64i_v), params returns a single value, the start offset
1354 of the binding range for each indexed uniform buffer binding. The
1355 initial value is 0 for all bindings. See glBindBufferRange().
1356 GL_UNPACK_ALIGNMENT
1358 params returns one value, the byte alignment used for reading pixel
1360 data from memory. The initial value is 4. See glPixelStore().
1361 GL_UNPACK_IMAGE_HEIGHT
1363 params returns one value, the image height used for reading pixel
1365 data from memory. The initial is 0. See glPixelStore().
1366 GL_UNPACK_LSB_FIRST
1368 params returns a single boolean value indicating whether single-bit
1370 pixels being read from memory are read first from the least
1371 significant bit of each unsigned byte. The initial value is
1372 GL_FALSE. See glPixelStore().
1373 GL_UNPACK_ROW_LENGTH
1375 params returns one value, the row length used for reading pixel
1377 data from memory. The initial value is 0. See glPixelStore().
1378 GL_UNPACK_SKIP_IMAGES
1380 params returns one value, the number of pixel images skipped before
1382 the first pixel is read from memory. The initial value is 0. See
1383 glPixelStore().
1384 GL_UNPACK_SKIP_PIXELS
1386 params returns one value, the number of pixel locations skipped
1388 before the first pixel is read from memory. The initial value is 0.
1389 See glPixelStore().
1390 GL_UNPACK_SKIP_ROWS
1392 params returns one value, the number of rows of pixel locations
1394 skipped before the first pixel is read from memory. The initial
1395 value is 0. See glPixelStore().
1396 GL_UNPACK_SWAP_BYTES
1398 params returns a single boolean value indicating whether the bytes
1400 of two-byte and four-byte pixel indices and components are swapped
1401 after being read from memory. The initial value is GL_FALSE. See
1402 glPixelStore().
1403 GL_VERTEX_PROGRAM_POINT_SIZE
1405 params returns a single boolean value indicating whether vertex
1407 program point size mode is enabled. If enabled, and a vertex shader
1408 is active, then the point size is taken from the shader built-in
1409 gl_PointSize. If disabled, and a vertex shader is active, then the
1410 point size is taken from the point state as specified by
1411 glPointSize(). The initial value is GL_FALSE.
1412 GL_VERTEX_BINDING_DIVISOR
1414 Accepted by the indexed forms. params returns a single integer
1416 value representing the instance step divisor of the first element
1417 in the bound buffer's data store for vertex attribute bound to
1418 index.
1419 GL_VERTEX_BINDING_OFFSET
1421 Accepted by the indexed forms. params returns a single integer
1423 value representing the byte offset of the first element in the
1424 bound buffer's data store for vertex attribute bound to index.
1425 GL_VERTEX_BINDING_STRIDE
1427 Accepted by the indexed forms. params returns a single integer
1429 value representing the byte offset between the start of each
1430 element in the bound buffer's data store for vertex attribute bound
1431 to index.
1432 GL_MAX_VERTEX_ATTRIB_RELATIVE_OFFSET
1434 params returns a single integer value containing the maximum offset
1436 that may be added to a vertex binding offset.
1437 GL_MAX_VERTEX_ATTRIB_BINDINGS
1439 params returns a single integer value containing the maximum number
1441 of vertex buffers that may be bound.
1442 GL_VIEWPORT
1444 When used with non-indexed variants of glGet (such as
1446 glGetIntegerv), params returns four values: the x and y window
1447 coordinates of the viewport, followed by its width and height.
1448 Initially the x and y window coordinates are both set to 0, and the
1449 width and height are set to the width and height of the window into
1450 which the GL will do its rendering. See glViewport(). When used
1451 with indexed variants of glGet (such as glGetIntegeri_v), params
1452 returns four values: the x and y window coordinates of the indexed
1453 viewport, followed by its width and height. Initially the x and y
1454 window coordinates are both set to 0, and the width and height are
1455 set to the width and height of the window into which the GL will do
1456 its rendering. See glViewportIndexedf().
1457 GL_VIEWPORT_BOUNDS_RANGE
1459 params returns two values, the minimum and maximum viewport bounds
1461 range. The minimum range should be at least [-32768, 32767].
1462 GL_VIEWPORT_INDEX_PROVOKING_VERTEX
1464 params returns one value, the implementation dependent specifc
1466 vertex of a primitive that is used to select the viewport index. If
1467 the value returned is equivalent to GL_PROVOKING_VERTEX, then the
1468 vertex selection follows the convention specified by
1469 glProvokingVertex(). If the value returned is equivalent to
1470 GL_FIRST_VERTEX_CONVENTION, then the selection is always taken from
1471 the first vertex in the primitive. If the value returned is
1472 equivalent to GL_LAST_VERTEX_CONVENTION, then the selection is
1473 always taken from the last vertex in the primitive. If the value
1474 returned is equivalent to GL_UNDEFINED_VERTEX, then the selection
1475 is not guaranteed to be taken from any specific vertex in the
1476 primitive.
1477 GL_VIEWPORT_SUBPIXEL_BITS
1479 params returns a single value, the number of bits of sub-pixel
1481 precision which the GL uses to interpret the floating point
1482 viewport bounds. The minimum value is 0.
1483 GL_MAX_ELEMENT_INDEX
1485 params returns a single value, the maximum index that may be
1487 specified during the transfer of generic vertex attributes to the
1488 GL.
1489 Many of the boolean parameters can also be queried more easily using
1491 glIsEnabled().
1492
1494 The following parameters return the associated value for the active
1495 texture unit: GL_TEXTURE_1D, GL_TEXTURE_BINDING_1D, GL_TEXTURE_2D,
1496 GL_TEXTURE_BINDING_2D, GL_TEXTURE_3D and GL_TEXTURE_BINDING_3D.
1497 GL_MAX_VIEWPORTS, GL_VIEWPORT_SUBPIXEL_BITS, GL_VIEWPORT_BOUNDS_RANGE,
1499 GL_LAYER_PROVOKING_VERTEX, and GL_VIEWPORT_INDEX_PROVOKING_VERTEX are
1500 available only if the GL version is 4.1 or greater.
1501 GL_MAX_VERTEX_ATOMIC_COUNTERS, GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS,
1503 GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS,
1504 GL_MAX_GEOMETRY_ATOMIC_COUNTERS, GL_MAX_FRAMGENT_ATOMIC_COUNTERS, and
1505 GL_MIN_MAP_BUFFER_ALIGNMENT are accepted by pname only if the GL
1506 version is 4.2 or greater.
1507 GL_MAX_ELEMENT_INDEX is accepted by pname only if the GL version is 4.3
1509 or greater.
1510 GL_MAX_COMPUTE_UNIFORM_BLOCKS, GL_MAX_COMPUTE_TEXTURE_IMAGE_UNITS,
1512 GL_MAX_COMPUTE_UNIFORM_COMPONENTS, GL_MAX_COMPUTE_ATOMIC_COUNTERS,
1513 GL_MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS,
1514 GL_MAX_COMBINED_COMPUTE_UNIFORM_COMPONENTS,
1515 GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS, GL_MAX_COMPUTE_WORK_GROUP_COUNT,
1516 and GL_MAX_COMPUTE_WORK_GROUP_SIZE and
1517 GL_DISPATCH_INDIRECT_BUFFER_BINDING are available only if the GL
1518 version is 4.3 or greater.
1519 GL_MAX_DEBUG_GROUP_STACK_DEPTH, GL_DEBUG_GROUP_STACK_DEPTH and
1521 GL_MAX_LABEL_LENGTH are accepted only if the GL version is 4.3 or
1522 greater.
1523 GL_MAX_UNIFORM_LOCATIONS is accepted only if the GL version is 4.3 or
1525 greater.
1526 GL_MAX_FRAMEBUFFER_WIDTH, GL_MAX_FRAMEBUFFER_HEIGHT,
1528 GL_MAX_FRAMEBUFFER_LAYERS, and GL_MAX_FRAMEBUFFER_SAMPLES are available
1529 only if the GL version is 4.3 or greater.
1530 GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS,
1532 GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS,
1533 GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS,
1534 GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS,
1535 GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS, and
1536 GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS are available only if the GL
1537 version is 4.3 or higher.
1538 GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT is available only if the GL version
1540 is 4.3 or greater.
1541 GL_VERTEX_BINDING_DIVISOR, GL_VERTEX_BINDING_OFFSET,
1543 GL_VERTEX_BINDING_STRIDE, GL_MAX_VERTEX_ATTRIB_RELATIVE_OFFSET and
1544 GL_MAX_VERTEX_ATTRIB_BINDINGS are available only if the GL version is
1545 4.3 or greater.
1546
1548 GL_INVALID_ENUM is generated if pname is not an accepted value.
1549 GL_INVALID_VALUE is generated on any of glGetBooleani_v,
1551 glGetIntegeri_v, or glGetInteger64i_v if index is outside of the valid
1552 range for the indexed state target.
1553
1555 glGetActiveUniform(), glGetAttachedShaders(), glGetAttribLocation(),
1556 glGetBufferParameter(), glGetBufferPointerv(), glGetBufferSubData(),
1557 glGetCompressedTexImage(), glGetError(), glGetProgram(),
1558 glGetProgramInfoLog(), glGetQueryiv(), glGetQueryObject(),
1559 glGetShader(), glGetShaderInfoLog(), glGetShaderSource(),
1560 glGetString(), glGetTexImage(), glGetTexLevelParameter(),
1561 glGetTexParameter(), glGetUniform(), glGetUniformLocation(),
1562 glGetVertexAttrib(), glGetVertexAttribPointerv(), glIsEnabled()
1563
1565 Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2011
1566 Khronos Group. This document is licensed under the SGI Free Software B
1567 License. For details, see http://oss.sgi.com/projects/FreeB/.
1568
1570 opengl.org
1571opengl.org 06/10/2014 GLGET(3G)