glGet man page on RedHat
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GLGET(3G) OpenGL Manual GLGET(3G)
NAME
glGet - return the value or values of a selected parameter
C SPECIFICATION
void glGetBooleanv(GLenum pname, GLboolean * params);
C SPECIFICATION
void glGetDoublev(GLenum pname, GLdouble * params);
C SPECIFICATION
void glGetFloatv(GLenum pname, GLfloat * params);
C SPECIFICATION
void glGetIntegerv(GLenum pname, GLint * params);
C SPECIFICATION
void glGetInteger64v(GLenum pname, GLint64 * params);
PARAMETERS
pname
Specifies the parameter value to be returned. The symbolic
constants in the list below are accepted.
params
Returns the value or values of the specified parameter.
C SPECIFICATION
void glGetBooleani_v(GLenum pname, GLuint index, GLboolean * data);
C SPECIFICATION
void glGetIntegeri_v(GLenum pname, GLuint index, GLint * data);
C SPECIFICATION
void glGetFloati_v(GLenum pname, GLuint index, GLfloat * data);
C SPECIFICATION
void glGetDoublei_v(GLenum pname, GLuint index, GLdouble * data);
C SPECIFICATION
void glGetInteger64i_v(GLenum pname, GLuint index, GLint64 * data);
PARAMETERS
pname
Specifies the parameter value to be returned. The symbolic
constants in the list below are accepted.
index
Specifies the index of the particular element being queried.
data
Returns the value or values of the specified parameter.
DESCRIPTION
These four commands return values for simple state variables in GL.
pname is a symbolic constant indicating the state variable to be
returned, and params is a pointer to an array of the indicated type in
which to place the returned data.
Type conversion is performed if params has a different type than the
state variable value being requested. If glGetBooleanv is called, a
floating-point (or integer) value is converted to GL_FALSE if and only
if it is 0.0 (or 0). Otherwise, it is converted to GL_TRUE. If
glGetIntegerv is called, boolean values are returned as GL_TRUE or
GL_FALSE, and most floating-point values are rounded to the nearest
integer value. Floating-point colors and normals, however, are returned
with a linear mapping that maps 1.0 to the most positive representable
integer value and -1.0 to the most negative representable integer
value. If glGetFloatv or glGetDoublev is called, boolean values are
returned as GL_TRUE or GL_FALSE, and integer values are converted to
floating-point values.
The following symbolic constants are accepted by pname:
GL_ACTIVE_TEXTURE
params returns a single value indicating the active multitexture
unit. The initial value is GL_TEXTURE0. See glActiveTexture().
GL_ALIASED_LINE_WIDTH_RANGE
params returns a pair of values indicating the range of widths
supported for aliased lines. See glLineWidth().
GL_ARRAY_BUFFER_BINDING
params returns a single value, the name of the buffer object
currently bound to the target GL_ARRAY_BUFFER. If no buffer object
is bound to this target, 0 is returned. The initial value is 0. See
glBindBuffer().
GL_BLEND
params returns a single boolean value indicating whether blending
is enabled. The initial value is GL_FALSE. See glBlendFunc().
GL_BLEND_COLOR
params returns four values, the red, green, blue, and alpha values
which are the components of the blend color. See glBlendColor().
GL_BLEND_DST_ALPHA
params returns one value, the symbolic constant identifying the
alpha destination blend function. The initial value is GL_ZERO. See
glBlendFunc() and glBlendFuncSeparate().
GL_BLEND_DST_RGB
params returns one value, the symbolic constant identifying the RGB
destination blend function. The initial value is GL_ZERO. See
glBlendFunc() and glBlendFuncSeparate().
GL_BLEND_EQUATION_RGB
params returns one value, a symbolic constant indicating whether
the RGB blend equation is GL_FUNC_ADD, GL_FUNC_SUBTRACT,
GL_FUNC_REVERSE_SUBTRACT, GL_MIN or GL_MAX. See
glBlendEquationSeparate().
GL_BLEND_EQUATION_ALPHA
params returns one value, a symbolic constant indicating whether
the Alpha blend equation is GL_FUNC_ADD, GL_FUNC_SUBTRACT,
GL_FUNC_REVERSE_SUBTRACT, GL_MIN or GL_MAX. See
glBlendEquationSeparate().
GL_BLEND_SRC_ALPHA
params returns one value, the symbolic constant identifying the
alpha source blend function. The initial value is GL_ONE. See
glBlendFunc() and glBlendFuncSeparate().
GL_BLEND_SRC_RGB
params returns one value, the symbolic constant identifying the RGB
source blend function. The initial value is GL_ONE. See
glBlendFunc() and glBlendFuncSeparate().
GL_COLOR_CLEAR_VALUE
params returns four values: the red, green, blue, and alpha values
used to clear the color buffers. Integer values, if requested, are
linearly mapped from the internal floating-point representation
such that 1.0 returns the most positive representable integer
value, and -1.0 returns the most negative representable integer
value. The initial value is (0, 0, 0, 0). See glClearColor().
GL_COLOR_LOGIC_OP
params returns a single boolean value indicating whether a
fragment's RGBA color values are merged into the framebuffer using
a logical operation. The initial value is GL_FALSE. See
glLogicOp().
GL_COLOR_WRITEMASK
params returns four boolean values: the red, green, blue, and alpha
write enables for the color buffers. The initial value is (GL_TRUE,
GL_TRUE, GL_TRUE, GL_TRUE). See glColorMask().
GL_COMPRESSED_TEXTURE_FORMATS
params returns a list of symbolic constants of length
GL_NUM_COMPRESSED_TEXTURE_FORMATS indicating which compressed
texture formats are available. See glCompressedTexImage2D().
GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS
params returns one value, the maximum number of active shader
storage blocks that may be accessed by a compute shader.
GL_MAX_COMBINED_SHADER_STORAGE_BLOCKS
params returns one value, the maximum total number of active shader
storage blocks that may be accessed by all active shaders.
GL_MAX_COMPUTE_UNIFORM_BLOCKS
params returns one value, the maximum number of uniform blocks per
compute shader. The value must be at least 14. See
glUniformBlockBinding().
GL_MAX_COMPUTE_TEXTURE_IMAGE_UNITS
params returns one value, the maximum supported texture image units
that can be used to access texture maps from the compute shader.
The value may be at least 16. See glActiveTexture().
GL_MAX_COMPUTE_UNIFORM_COMPONENTS
params returns one value, the maximum number of individual
floating-point, integer, or boolean values that can be held in
uniform variable storage for a compute shader. The value must be at
least 1024. See glUniform().
GL_MAX_COMPUTE_ATOMIC_COUNTERS
params returns a single value, the maximum number of atomic
counters available to compute shaders.
GL_MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS
params returns a single value, the maximum number of atomic counter
buffers that may be accessed by a compute shader.
GL_MAX_COMBINED_COMPUTE_UNIFORM_COMPONENTS
params returns one value, the number of words for compute shader
uniform variables in all uniform blocks (including default). The
value must be at least 1. See glUniform().
GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS
params returns one value, the number of invocations in a single
local work group (i.e., the product of the three dimensions) that
may be dispatched to a compute shader.
GL_MAX_COMPUTE_WORK_GROUP_COUNT
Accepted by the indexed versions of glGet. params the maximum
number of work groups that may be dispatched to a compute shader.
Indices 0, 1, and 2 correspond to the X, Y and Z dimensions,
respectively.
GL_MAX_COMPUTE_WORK_GROUP_SIZE
Accepted by the indexed versions of glGet. params the maximum size
of a work groups that may be used during compilation of a compute
shader. Indices 0, 1, and 2 correspond to the X, Y and Z
dimensions, respectively.
GL_DISPATCH_INDIRECT_BUFFER_BINDING
params returns a single value, the name of the buffer object
currently bound to the target GL_DISPATCH_INDIRECT_BUFFER. If no
buffer object is bound to this target, 0 is returned. The initial
value is 0. See glBindBuffer().
GL_MAX_DEBUG_GROUP_STACK_DEPTH
params returns a single value, the maximum depth of the debug
message group stack.
GL_DEBUG_GROUP_STACK_DEPTH
params returns a single value, the current depth of the debug
message group stack.
GL_CONTEXT_FLAGS
params returns one value, the flags with which the context was
created (such as debugging functionality).
GL_CULL_FACE
params returns a single boolean value indicating whether polygon
culling is enabled. The initial value is GL_FALSE. See
glCullFace().
GL_CURRENT_PROGRAM
params returns one value, the name of the program object that is
currently active, or 0 if no program object is active. See
glUseProgram().
GL_DEPTH_CLEAR_VALUE
params returns one value, the value that is used to clear the depth
buffer. Integer values, if requested, are linearly mapped from the
internal floating-point representation such that 1.0 returns the
most positive representable integer value, and -1.0 returns the
most negative representable integer value. The initial value is 1.
See glClearDepth().
GL_DEPTH_FUNC
params returns one value, the symbolic constant that indicates the
depth comparison function. The initial value is GL_LESS. See
glDepthFunc().
GL_DEPTH_RANGE
params returns two values: the near and far mapping limits for the
depth buffer. Integer values, if requested, are linearly mapped
from the internal floating-point representation such that 1.0
returns the most positive representable integer value, and -1.0
returns the most negative representable integer value. The initial
value is (0, 1). See glDepthRange().
GL_DEPTH_TEST
params returns a single boolean value indicating whether depth
testing of fragments is enabled. The initial value is GL_FALSE. See
glDepthFunc() and glDepthRange().
GL_DEPTH_WRITEMASK
params returns a single boolean value indicating if the depth
buffer is enabled for writing. The initial value is GL_TRUE. See
glDepthMask().
GL_DITHER
params returns a single boolean value indicating whether dithering
of fragment colors and indices is enabled. The initial value is
GL_TRUE.
GL_DOUBLEBUFFER
params returns a single boolean value indicating whether double
buffering is supported.
GL_DRAW_BUFFER
params returns one value, a symbolic constant indicating which
buffers are being drawn to. See glDrawBuffer(). The initial value
is GL_BACK if there are back buffers, otherwise it is GL_FRONT.
GL_DRAW_BUFFERi
params returns one value, a symbolic constant indicating which
buffers are being drawn to by the corresponding output color. See
glDrawBuffers(). The initial value of GL_DRAW_BUFFER0 is GL_BACK if
there are back buffers, otherwise it is GL_FRONT. The initial
values of draw buffers for all other output colors is GL_NONE.
GL_DRAW_FRAMEBUFFER_BINDING
params returns one value, the name of the framebuffer object
currently bound to the GL_DRAW_FRAMEBUFFER target. If the default
framebuffer is bound, this value will be zero. The initial value is
zero. See glBindFramebuffer().
GL_READ_FRAMEBUFFER_BINDING
params returns one value, the name of the framebuffer object
currently bound to the GL_READ_FRAMEBUFFER target. If the default
framebuffer is bound, this value will be zero. The initial value is
zero. See glBindFramebuffer().
GL_ELEMENT_ARRAY_BUFFER_BINDING
params returns a single value, the name of the buffer object
currently bound to the target GL_ELEMENT_ARRAY_BUFFER. If no buffer
object is bound to this target, 0 is returned. The initial value is
0. See glBindBuffer().
GL_FRAGMENT_SHADER_DERIVATIVE_HINT
params returns one value, a symbolic constant indicating the mode
of the derivative accuracy hint for fragment shaders. The initial
value is GL_DONT_CARE. See glHint().
GL_IMPLEMENTATION_COLOR_READ_FORMAT
params returns a single GLenum value indicating the
implementation's preferred pixel data format. See glReadPixels().
GL_IMPLEMENTATION_COLOR_READ_TYPE
params returns a single GLenum value indicating the
implementation's preferred pixel data type. See glReadPixels().
GL_LINE_SMOOTH
params returns a single boolean value indicating whether
antialiasing of lines is enabled. The initial value is GL_FALSE.
See glLineWidth().
GL_LINE_SMOOTH_HINT
params returns one value, a symbolic constant indicating the mode
of the line antialiasing hint. The initial value is GL_DONT_CARE.
See glHint().
GL_LINE_WIDTH
params returns one value, the line width as specified with
glLineWidth(). The initial value is 1.
GL_LAYER_PROVOKING_VERTEX
params returns one value, the implementation dependent specifc
vertex of a primitive that is used to select the rendering layer.
If the value returned is equivalent to GL_PROVOKING_VERTEX, then
the vertex selection follows the convention specified by
glProvokingVertex(). If the value returned is equivalent to
GL_FIRST_VERTEX_CONVENTION, then the selection is always taken from
the first vertex in the primitive. If the value returned is
equivalent to GL_LAST_VERTEX_CONVENTION, then the selection is
always taken from the last vertex in the primitive. If the value
returned is equivalent to GL_UNDEFINED_VERTEX, then the selection
is not guaranteed to be taken from any specific vertex in the
primitive.
GL_LINE_WIDTH_GRANULARITY
params returns one value, the width difference between adjacent
supported widths for antialiased lines. See glLineWidth().
GL_LINE_WIDTH_RANGE
params returns two values: the smallest and largest supported
widths for antialiased lines. See glLineWidth().
GL_LOGIC_OP_MODE
params returns one value, a symbolic constant indicating the
selected logic operation mode. The initial value is GL_COPY. See
glLogicOp().
GL_MAJOR_VERSION
params returns one value, the major version number of the OpenGL
API supported by the current context.
GL_MAX_3D_TEXTURE_SIZE
params returns one value, a rough estimate of the largest 3D
texture that the GL can handle. The value must be at least 64. Use
GL_PROXY_TEXTURE_3D to determine if a texture is too large. See
glTexImage3D().
GL_MAX_ARRAY_TEXTURE_LAYERS
params returns one value. The value indicates the maximum number of
layers allowed in an array texture, and must be at least 256. See
glTexImage2D().
GL_MAX_CLIP_DISTANCES
params returns one value, the maximum number of application-defined
clipping distances. The value must be at least 8.
GL_MAX_COLOR_TEXTURE_SAMPLES
params returns one value, the maximum number of samples in a color
multisample texture.
GL_MAX_COMBINED_ATOMIC_COUNTERS
params returns a single value, the maximum number of atomic
counters available to all active shaders.
GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS
params returns one value, the number of words for fragment shader
uniform variables in all uniform blocks (including default). The
value must be at least 1. See glUniform().
GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS
params returns one value, the number of words for geometry shader
uniform variables in all uniform blocks (including default). The
value must be at least 1. See glUniform().
GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS
params returns one value, the maximum supported texture image units
that can be used to access texture maps from the vertex shader and
the fragment processor combined. If both the vertex shader and the
fragment processing stage access the same texture image unit, then
that counts as using two texture image units against this limit.
The value must be at least 48. See glActiveTexture().
GL_MAX_COMBINED_UNIFORM_BLOCKS
params returns one value, the maximum number of uniform blocks per
program. The value must be at least 36. See
glUniformBlockBinding().
GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS
params returns one value, the number of words for vertex shader
uniform variables in all uniform blocks (including default). The
value must be at least 1. See glUniform().
GL_MAX_CUBE_MAP_TEXTURE_SIZE
params returns one value. The value gives a rough estimate of the
largest cube-map texture that the GL can handle. The value must be
at least 1024. Use GL_PROXY_TEXTURE_CUBE_MAP to determine if a
texture is too large. See glTexImage2D().
GL_MAX_DEPTH_TEXTURE_SAMPLES
params returns one value, the maximum number of samples in a
multisample depth or depth-stencil texture.
GL_MAX_DRAW_BUFFERS
params returns one value, the maximum number of simultaneous
outputs that may be written in a fragment shader. The value must be
at least 8. See glDrawBuffers().
GL_MAX_DUALSOURCE_DRAW_BUFFERS
params returns one value, the maximum number of active draw buffers
when using dual-source blending. The value must be at least 1. See
glBlendFunc() and glBlendFuncSeparate().
GL_MAX_ELEMENTS_INDICES
params returns one value, the recommended maximum number of vertex
array indices. See glDrawRangeElements().
GL_MAX_ELEMENTS_VERTICES
params returns one value, the recommended maximum number of vertex
array vertices. See glDrawRangeElements().
GL_MAX_FRAGMENT_ATOMIC_COUNTERS
params returns a single value, the maximum number of atomic
counters available to fragment shaders.
GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS
params returns one value, the maximum number of active shader
storage blocks that may be accessed by a fragment shader.
GL_MAX_FRAGMENT_INPUT_COMPONENTS
params returns one value, the maximum number of components of the
inputs read by the fragment shader, which must be at least 128.
GL_MAX_FRAGMENT_UNIFORM_COMPONENTS
params returns one value, the maximum number of individual
floating-point, integer, or boolean values that can be held in
uniform variable storage for a fragment shader. The value must be
at least 1024. See glUniform().
GL_MAX_FRAGMENT_UNIFORM_VECTORS
params returns one value, the maximum number of individual
4-vectors of floating-point, integer, or boolean values that can be
held in uniform variable storage for a fragment shader. The value
is equal to the value of GL_MAX_FRAGMENT_UNIFORM_COMPONENTS divided
by 4 and must be at least 256. See glUniform().
GL_MAX_FRAGMENT_UNIFORM_BLOCKS
params returns one value, the maximum number of uniform blocks per
fragment shader. The value must be at least 12. See
glUniformBlockBinding().
GL_MAX_FRAMEBUFFER_WIDTH
params returns one value, the maximum width for a framebuffer that
has no attachments, which must be at least 16384. See
glFramebufferParameter().
GL_MAX_FRAMEBUFFER_HEIGHT
params returns one value, the maximum height for a framebuffer that
has no attachments, which must be at least 16384. See
glFramebufferParameter().
GL_MAX_FRAMEBUFFER_LAYERS
params returns one value, the maximum number of layers for a
framebuffer that has no attachments, which must be at least 2048.
See glFramebufferParameter().
GL_MAX_FRAMEBUFFER_SAMPLES
params returns one value, the maximum samples in a framebuffer that
has no attachments, which must be at least 4. See
glFramebufferParameter().
GL_MAX_GEOMETRY_ATOMIC_COUNTERS
params returns a single value, the maximum number of atomic
counters available to geometry shaders.
GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS
params returns one value, the maximum number of active shader
storage blocks that may be accessed by a geometry shader.
GL_MAX_GEOMETRY_INPUT_COMPONENTS
params returns one value, the maximum number of components of
inputs read by a geometry shader, which must be at least 64.
GL_MAX_GEOMETRY_OUTPUT_COMPONENTS
params returns one value, the maximum number of components of
outputs written by a geometry shader, which must be at least 128.
GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS
params returns one value, the maximum supported texture image units
that can be used to access texture maps from the geometry shader.
The value must be at least 16. See glActiveTexture().
GL_MAX_GEOMETRY_UNIFORM_BLOCKS
params returns one value, the maximum number of uniform blocks per
geometry shader. The value must be at least 12. See
glUniformBlockBinding().
GL_MAX_GEOMETRY_UNIFORM_COMPONENTS
params returns one value, the maximum number of individual
floating-point, integer, or boolean values that can be held in
uniform variable storage for a geometry shader. The value must be
at least 1024. See glUniform().
GL_MAX_INTEGER_SAMPLES
params returns one value, the maximum number of samples supported
in integer format multisample buffers.
GL_MIN_MAP_BUFFER_ALIGNMENT
params returns one value, the minimum alignment in basic machine
units of pointers returned fromglMapBuffer() and
glMapBufferRange(). This value must be a power of two and must be
at least 64.
GL_MAX_LABEL_LENGTH
params returns one value, the maximum length of a label that may be
assigned to an object. See glObjectLabel() and glObjectPtrLabel().
GL_MAX_PROGRAM_TEXEL_OFFSET
params returns one value, the maximum texel offset allowed in a
texture lookup, which must be at least 7.
GL_MIN_PROGRAM_TEXEL_OFFSET
params returns one value, the minimum texel offset allowed in a
texture lookup, which must be at most -8.
GL_MAX_RECTANGLE_TEXTURE_SIZE
params returns one value. The value gives a rough estimate of the
largest rectangular texture that the GL can handle. The value must
be at least 1024. Use GL_PROXY_RECTANGLE_TEXTURE to determine if a
texture is too large. See glTexImage2D().
GL_MAX_RENDERBUFFER_SIZE
params returns one value. The value indicates the maximum supported
size for renderbuffers. See glFramebufferRenderbuffer().
GL_MAX_SAMPLE_MASK_WORDS
params returns one value, the maximum number of sample mask words.
GL_MAX_SERVER_WAIT_TIMEOUT
params returns one value, the maximum glWaitSync() timeout
interval.
GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS
params returns one value, the maximum number of shader storage
buffer binding points on the context, which must be at least 8.
GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS
params returns a single value, the maximum number of atomic
counters available to tessellation control shaders.
GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS
params returns a single value, the maximum number of atomic
counters available to tessellation evaluation shaders.
GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS
params returns one value, the maximum number of active shader
storage blocks that may be accessed by a tessellation control
shader.
GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS
params returns one value, the maximum number of active shader
storage blocks that may be accessed by a tessellation evaluation
shader.
GL_MAX_TEXTURE_BUFFER_SIZE
params returns one value. The value gives the maximum number of
texels allowed in the texel array of a texture buffer object. Value
must be at least 65536.
GL_MAX_TEXTURE_IMAGE_UNITS
params returns one value, the maximum supported texture image units
that can be used to access texture maps from the fragment shader.
The value must be at least 16. See glActiveTexture().
GL_MAX_TEXTURE_LOD_BIAS
params returns one value, the maximum, absolute value of the
texture level-of-detail bias. The value must be at least 2.0.
GL_MAX_TEXTURE_SIZE
params returns one value. The value gives a rough estimate of the
largest texture that the GL can handle. The value must be at least
1024. Use a proxy texture target such as GL_PROXY_TEXTURE_1D or
GL_PROXY_TEXTURE_2D to determine if a texture is too large. See
glTexImage1D() and glTexImage2D().
GL_MAX_UNIFORM_BUFFER_BINDINGS
params returns one value, the maximum number of uniform buffer
binding points on the context, which must be at least 36.
GL_MAX_UNIFORM_BLOCK_SIZE
params returns one value, the maximum size in basic machine units
of a uniform block, which must be at least 16384.
GL_MAX_UNIFORM_LOCATIONS
params returns one value, the maximum number of explicitly
assignable uniform locations, which must be at least 1024.
GL_MAX_VARYING_COMPONENTS
params returns one value, the number components for varying
variables, which must be at least 60.
GL_MAX_VARYING_VECTORS
params returns one value, the number 4-vectors for varying
variables, which is equal to the value of GL_MAX_VARYING_COMPONENTS
and must be at least 15.
GL_MAX_VARYING_FLOATS
params returns one value, the maximum number of interpolators
available for processing varying variables used by vertex and
fragment shaders. This value represents the number of individual
floating-point values that can be interpolated; varying variables
declared as vectors, matrices, and arrays will all consume multiple
interpolators. The value must be at least 32.
GL_MAX_VERTEX_ATOMIC_COUNTERS
params returns a single value, the maximum number of atomic
counters available to vertex shaders.
GL_MAX_VERTEX_ATTRIBS
params returns one value, the maximum number of 4-component generic
vertex attributes accessible to a vertex shader. The value must be
at least 16. See glVertexAttrib().
GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS
params returns one value, the maximum number of active shader
storage blocks that may be accessed by a vertex shader.
GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS
params returns one value, the maximum supported texture image units
that can be used to access texture maps from the vertex shader. The
value may be at least 16. See glActiveTexture().
GL_MAX_VERTEX_UNIFORM_COMPONENTS
params returns one value, the maximum number of individual
floating-point, integer, or boolean values that can be held in
uniform variable storage for a vertex shader. The value must be at
least 1024. See glUniform().
GL_MAX_VERTEX_UNIFORM_VECTORS
params returns one value, the maximum number of 4-vectors that may
be held in uniform variable storage for the vertex shader. The
value of GL_MAX_VERTEX_UNIFORM_VECTORS is equal to the value of
GL_MAX_VERTEX_UNIFORM_COMPONENTS and must be at least 256.
GL_MAX_VERTEX_OUTPUT_COMPONENTS
params returns one value, the maximum number of components of
output written by a vertex shader, which must be at least 64.
GL_MAX_VERTEX_UNIFORM_BLOCKS
params returns one value, the maximum number of uniform blocks per
vertex shader. The value must be at least 12. See
glUniformBlockBinding().
GL_MAX_VIEWPORT_DIMS
params returns two values: the maximum supported width and height
of the viewport. These must be at least as large as the visible
dimensions of the display being rendered to. See glViewport().
GL_MAX_VIEWPORTS
params returns one value, the maximum number of simultaneous
viewports that are supported. The value must be at least 16. See
glViewportIndexed().
GL_MINOR_VERSION
params returns one value, the minor version number of the OpenGL
API supported by the current context.
GL_NUM_COMPRESSED_TEXTURE_FORMATS
params returns a single integer value indicating the number of
available compressed texture formats. The minimum value is 4. See
glCompressedTexImage2D().
GL_NUM_EXTENSIONS
params returns one value, the number of extensions supported by the
GL implementation for the current context. See glGetString().
GL_NUM_PROGRAM_BINARY_FORMATS
params returns one value, the number of program binary formats
supported by the implementation.
GL_NUM_SHADER_BINARY_FORMATS
params returns one value, the number of binary shader formats
supported by the implementation. If this value is greater than
zero, then the implementation supports loading binary shaders. If
it is zero, then the loading of binary shaders by the
implementation is not supported.
GL_PACK_ALIGNMENT
params returns one value, the byte alignment used for writing pixel
data to memory. The initial value is 4. See glPixelStore().
GL_PACK_IMAGE_HEIGHT
params returns one value, the image height used for writing pixel
data to memory. The initial value is 0. See glPixelStore().
GL_PACK_LSB_FIRST
params returns a single boolean value indicating whether single-bit
pixels being written to memory are written first to the least
significant bit of each unsigned byte. The initial value is
GL_FALSE. See glPixelStore().
GL_PACK_ROW_LENGTH
params returns one value, the row length used for writing pixel
data to memory. The initial value is 0. See glPixelStore().
GL_PACK_SKIP_IMAGES
params returns one value, the number of pixel images skipped before
the first pixel is written into memory. The initial value is 0. See
glPixelStore().
GL_PACK_SKIP_PIXELS
params returns one value, the number of pixel locations skipped
before the first pixel is written into memory. The initial value is
0. See glPixelStore().
GL_PACK_SKIP_ROWS
params returns one value, the number of rows of pixel locations
skipped before the first pixel is written into memory. The initial
value is 0. See glPixelStore().
GL_PACK_SWAP_BYTES
params returns a single boolean value indicating whether the bytes
of two-byte and four-byte pixel indices and components are swapped
before being written to memory. The initial value is GL_FALSE. See
glPixelStore().
GL_PIXEL_PACK_BUFFER_BINDING
params returns a single value, the name of the buffer object
currently bound to the target GL_PIXEL_PACK_BUFFER. If no buffer
object is bound to this target, 0 is returned. The initial value is
0. See glBindBuffer().
GL_PIXEL_UNPACK_BUFFER_BINDING
params returns a single value, the name of the buffer object
currently bound to the target GL_PIXEL_UNPACK_BUFFER. If no buffer
object is bound to this target, 0 is returned. The initial value is
0. See glBindBuffer().
GL_POINT_FADE_THRESHOLD_SIZE
params returns one value, the point size threshold for determining
the point size. See glPointParameter().
GL_PRIMITIVE_RESTART_INDEX
params returns one value, the current primitive restart index. The
initial value is 0. See glPrimitiveRestartIndex().
GL_PROGRAM_BINARY_FORMATS
params an array of GL_NUM_PROGRAM_BINARY_FORMATS values, indicating
the proram binary formats supported by the implementation.
GL_PROGRAM_PIPELINE_BINDING
params a single value, the name of the currently bound program
pipeline object, or zero if no program pipeline object is bound.
See glBindProgramPipeline().
GL_PROVOKING_VERTEX
params returns one value, the currently selected provoking vertex
convention. The initial value is GL_LAST_VERTEX_CONVENTION. See
glProvokingVertex().
GL_POINT_SIZE
params returns one value, the point size as specified by
glPointSize(). The initial value is 1.
GL_POINT_SIZE_GRANULARITY
params returns one value, the size difference between adjacent
supported sizes for antialiased points. See glPointSize().
GL_POINT_SIZE_RANGE
params returns two values: the smallest and largest supported sizes
for antialiased points. The smallest size must be at most 1, and
the largest size must be at least 1. See glPointSize().
GL_POLYGON_OFFSET_FACTOR
params returns one value, the scaling factor used to determine the
variable offset that is added to the depth value of each fragment
generated when a polygon is rasterized. The initial value is 0. See
glPolygonOffset().
GL_POLYGON_OFFSET_UNITS
params returns one value. This value is multiplied by an
implementation-specific value and then added to the depth value of
each fragment generated when a polygon is rasterized. The initial
value is 0. See glPolygonOffset().
GL_POLYGON_OFFSET_FILL
params returns a single boolean value indicating whether polygon
offset is enabled for polygons in fill mode. The initial value is
GL_FALSE. See glPolygonOffset().
GL_POLYGON_OFFSET_LINE
params returns a single boolean value indicating whether polygon
offset is enabled for polygons in line mode. The initial value is
GL_FALSE. See glPolygonOffset().
GL_POLYGON_OFFSET_POINT
params returns a single boolean value indicating whether polygon
offset is enabled for polygons in point mode. The initial value is
GL_FALSE. See glPolygonOffset().
GL_POLYGON_SMOOTH
params returns a single boolean value indicating whether
antialiasing of polygons is enabled. The initial value is GL_FALSE.
See glPolygonMode().
GL_POLYGON_SMOOTH_HINT
params returns one value, a symbolic constant indicating the mode
of the polygon antialiasing hint. The initial value is
GL_DONT_CARE. See glHint().
GL_READ_BUFFER
params returns one value, a symbolic constant indicating which
color buffer is selected for reading. The initial value is GL_BACK
if there is a back buffer, otherwise it is GL_FRONT. See
glReadPixels().
GL_RENDERBUFFER_BINDING
params returns a single value, the name of the renderbuffer object
currently bound to the target GL_RENDERBUFFER. If no renderbuffer
object is bound to this target, 0 is returned. The initial value is
0. See glBindRenderbuffer().
GL_SAMPLE_BUFFERS
params returns a single integer value indicating the number of
sample buffers associated with the framebuffer. See
glSampleCoverage().
GL_SAMPLE_COVERAGE_VALUE
params returns a single positive floating-point value indicating
the current sample coverage value. See glSampleCoverage().
GL_SAMPLE_COVERAGE_INVERT
params returns a single boolean value indicating if the temporary
coverage value should be inverted. See glSampleCoverage().
GL_SAMPLER_BINDING
params returns a single value, the name of the sampler object
currently bound to the active texture unit. The initial value is 0.
See glBindSampler().
GL_SAMPLES
params returns a single integer value indicating the coverage mask
size. See glSampleCoverage().
GL_SCISSOR_BOX
params returns four values: the x and y window coordinates of the
scissor box, followed by its width and height. Initially the x and
y window coordinates are both 0 and the width and height are set to
the size of the window. See glScissor().
GL_SCISSOR_TEST
params returns a single boolean value indicating whether scissoring
is enabled. The initial value is GL_FALSE. See glScissor().
GL_SHADER_COMPILER
params returns a single boolean value indicating whether an online
shader compiler is present in the implementation. All desktop
OpenGL implementations must support online shader compilations, and
therefore the value of GL_SHADER_COMPILER will always be GL_TRUE.
GL_SHADER_STORAGE_BUFFER_BINDING
When used with non-indexed variants of glGet (such as
glGetIntegerv), params returns a single value, the name of the
buffer object currently bound to the target
GL_SHADER_STORAGE_BUFFER. If no buffer object is bound to this
target, 0 is returned. When used with indexed variants of glGet
(such as glGetIntegeri_v), params returns a single value, the name
of the buffer object bound to the indexed shader storage buffer
binding points. The initial value is 0 for all targets. See
glBindBuffer(), glBindBufferBase(), and glBindBufferRange().
GL_SHADER_STORAGE_BUFFER_OFFSET_ALIGNMENT
params returns a single value, the minimum required alignment for
shader storage buffer sizes and offset. The initial value is 1. See
glShaderStorateBlockBinding().
GL_SHADER_STORAGE_BUFFER_START
When used with indexed variants of glGet (such as
glGetInteger64i_v), params returns a single value, the start offset
of the binding range for each indexed shader storage buffer
binding. The initial value is 0 for all bindings. See
glBindBufferRange().
GL_SHADER_STORAGE_BUFFER_SIZE
When used with indexed variants of glGet (such as
glGetInteger64i_v), params returns a single value, the size of the
binding range for each indexed shader storage buffer binding. The
initial value is 0 for all bindings. See glBindBufferRange().
GL_SMOOTH_LINE_WIDTH_RANGE
params returns a pair of values indicating the range of widths
supported for smooth (antialiased) lines. See glLineWidth().
GL_SMOOTH_LINE_WIDTH_GRANULARITY
params returns a single value indicating the level of quantization
applied to smooth line width parameters.
GL_STENCIL_BACK_FAIL
params returns one value, a symbolic constant indicating what
action is taken for back-facing polygons when the stencil test
fails. The initial value is GL_KEEP. See glStencilOpSeparate().
GL_STENCIL_BACK_FUNC
params returns one value, a symbolic constant indicating what
function is used for back-facing polygons to compare the stencil
reference value with the stencil buffer value. The initial value is
GL_ALWAYS. See glStencilFuncSeparate().
GL_STENCIL_BACK_PASS_DEPTH_FAIL
params returns one value, a symbolic constant indicating what
action is taken for back-facing polygons when the stencil test
passes, but the depth test fails. The initial value is GL_KEEP. See
glStencilOpSeparate().
GL_STENCIL_BACK_PASS_DEPTH_PASS
params returns one value, a symbolic constant indicating what
action is taken for back-facing polygons when the stencil test
passes and the depth test passes. The initial value is GL_KEEP. See
glStencilOpSeparate().
GL_STENCIL_BACK_REF
params returns one value, the reference value that is compared with
the contents of the stencil buffer for back-facing polygons. The
initial value is 0. See glStencilFuncSeparate().
GL_STENCIL_BACK_VALUE_MASK
params returns one value, the mask that is used for back-facing
polygons to mask both the stencil reference value and the stencil
buffer value before they are compared. The initial value is all
1's. See glStencilFuncSeparate().
GL_STENCIL_BACK_WRITEMASK
params returns one value, the mask that controls writing of the
stencil bitplanes for back-facing polygons. The initial value is
all 1's. See glStencilMaskSeparate().
GL_STENCIL_CLEAR_VALUE
params returns one value, the index to which the stencil bitplanes
are cleared. The initial value is 0. See glClearStencil().
GL_STENCIL_FAIL
params returns one value, a symbolic constant indicating what
action is taken when the stencil test fails. The initial value is
GL_KEEP. See glStencilOp(). This stencil state only affects
non-polygons and front-facing polygons. Back-facing polygons use
separate stencil state. See glStencilOpSeparate().
GL_STENCIL_FUNC
params returns one value, a symbolic constant indicating what
function is used to compare the stencil reference value with the
stencil buffer value. The initial value is GL_ALWAYS. See
glStencilFunc(). This stencil state only affects non-polygons and
front-facing polygons. Back-facing polygons use separate stencil
state. See glStencilFuncSeparate().
GL_STENCIL_PASS_DEPTH_FAIL
params returns one value, a symbolic constant indicating what
action is taken when the stencil test passes, but the depth test
fails. The initial value is GL_KEEP. See glStencilOp(). This
stencil state only affects non-polygons and front-facing polygons.
Back-facing polygons use separate stencil state. See
glStencilOpSeparate().
GL_STENCIL_PASS_DEPTH_PASS
params returns one value, a symbolic constant indicating what
action is taken when the stencil test passes and the depth test
passes. The initial value is GL_KEEP. See glStencilOp(). This
stencil state only affects non-polygons and front-facing polygons.
Back-facing polygons use separate stencil state. See
glStencilOpSeparate().
GL_STENCIL_REF
params returns one value, the reference value that is compared with
the contents of the stencil buffer. The initial value is 0. See
glStencilFunc(). This stencil state only affects non-polygons and
front-facing polygons. Back-facing polygons use separate stencil
state. See glStencilFuncSeparate().
GL_STENCIL_TEST
params returns a single boolean value indicating whether stencil
testing of fragments is enabled. The initial value is GL_FALSE. See
glStencilFunc() and glStencilOp().
GL_STENCIL_VALUE_MASK
params returns one value, the mask that is used to mask both the
stencil reference value and the stencil buffer value before they
are compared. The initial value is all 1's. See glStencilFunc().
This stencil state only affects non-polygons and front-facing
polygons. Back-facing polygons use separate stencil state. See
glStencilFuncSeparate().
GL_STENCIL_WRITEMASK
params returns one value, the mask that controls writing of the
stencil bitplanes. The initial value is all 1's. See
glStencilMask(). This stencil state only affects non-polygons and
front-facing polygons. Back-facing polygons use separate stencil
state. See glStencilMaskSeparate().
GL_STEREO
params returns a single boolean value indicating whether stereo
buffers (left and right) are supported.
GL_SUBPIXEL_BITS
params returns one value, an estimate of the number of bits of
subpixel resolution that are used to position rasterized geometry
in window coordinates. The value must be at least 4.
GL_TEXTURE_BINDING_1D
params returns a single value, the name of the texture currently
bound to the target GL_TEXTURE_1D. The initial value is 0. See
glBindTexture().
GL_TEXTURE_BINDING_1D_ARRAY
params returns a single value, the name of the texture currently
bound to the target GL_TEXTURE_1D_ARRAY. The initial value is 0.
See glBindTexture().
GL_TEXTURE_BINDING_2D
params returns a single value, the name of the texture currently
bound to the target GL_TEXTURE_2D. The initial value is 0. See
glBindTexture().
GL_TEXTURE_BINDING_2D_ARRAY
params returns a single value, the name of the texture currently
bound to the target GL_TEXTURE_2D_ARRAY. The initial value is 0.
See glBindTexture().
GL_TEXTURE_BINDING_2D_MULTISAMPLE
params returns a single value, the name of the texture currently
bound to the target GL_TEXTURE_2D_MULTISAMPLE. The initial value is
0. See glBindTexture().
GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY
params returns a single value, the name of the texture currently
bound to the target GL_TEXTURE_2D_MULTISAMPLE_ARRAY. The initial
value is 0. See glBindTexture().
GL_TEXTURE_BINDING_3D
params returns a single value, the name of the texture currently
bound to the target GL_TEXTURE_3D. The initial value is 0. See
glBindTexture().
GL_TEXTURE_BINDING_BUFFER
params returns a single value, the name of the texture currently
bound to the target GL_TEXTURE_BUFFER. The initial value is 0. See
glBindTexture().
GL_TEXTURE_BINDING_CUBE_MAP
params returns a single value, the name of the texture currently
bound to the target GL_TEXTURE_CUBE_MAP. The initial value is 0.
See glBindTexture().
GL_TEXTURE_BINDING_RECTANGLE
params returns a single value, the name of the texture currently
bound to the target GL_TEXTURE_RECTANGLE. The initial value is 0.
See glBindTexture().
GL_TEXTURE_COMPRESSION_HINT
params returns a single value indicating the mode of the texture
compression hint. The initial value is GL_DONT_CARE.
GL_TEXTURE_BUFFER_BINDING
params returns a single value, the name of the buffer object
currently bound to the GL_TEXTURE_BUFFER buffer binding point. The
initial value is 0. See glBindBuffer().
GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT
params returns a single value, the minimum required alignment for
texture buffer sizes and offset. The initial value is 1. See
glUniformBlockBinding().
GL_TIMESTAMP
params returns a single value, the 64-bit value of the current GL
time. See glQueryCounter().
GL_TRANSFORM_FEEDBACK_BUFFER_BINDING
When used with non-indexed variants of glGet (such as
glGetIntegerv), params returns a single value, the name of the
buffer object currently bound to the target
GL_TRANSFORM_FEEDBACK_BUFFER. If no buffer object is bound to this
target, 0 is returned. When used with indexed variants of glGet
(such as glGetIntegeri_v), params returns a single value, the name
of the buffer object bound to the indexed transform feedback
attribute stream. The initial value is 0 for all targets. See
glBindBuffer(), glBindBufferBase(), and glBindBufferRange().
GL_TRANSFORM_FEEDBACK_BUFFER_START
When used with indexed variants of glGet (such as
glGetInteger64i_v), params returns a single value, the start offset
of the binding range for each transform feedback attribute stream.
The initial value is 0 for all streams. See glBindBufferRange().
GL_TRANSFORM_FEEDBACK_BUFFER_SIZE
When used with indexed variants of glGet (such as
glGetInteger64i_v), params returns a single value, the size of the
binding range for each transform feedback attribute stream. The
initial value is 0 for all streams. See glBindBufferRange().
GL_UNIFORM_BUFFER_BINDING
When used with non-indexed variants of glGet (such as
glGetIntegerv), params returns a single value, the name of the
buffer object currently bound to the target GL_UNIFORM_BUFFER. If
no buffer object is bound to this target, 0 is returned. When used
with indexed variants of glGet (such as glGetIntegeri_v), params
returns a single value, the name of the buffer object bound to the
indexed uniform buffer binding point. The initial value is 0 for
all targets. See glBindBuffer(), glBindBufferBase(), and
glBindBufferRange().
GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT
params returns a single value, the minimum required alignment for
uniform buffer sizes and offset. The initial value is 1. See
glUniformBlockBinding().
GL_UNIFORM_BUFFER_SIZE
When used with indexed variants of glGet (such as
glGetInteger64i_v), params returns a single value, the size of the
binding range for each indexed uniform buffer binding. The initial
value is 0 for all bindings. See glBindBufferRange().
GL_UNIFORM_BUFFER_START
When used with indexed variants of glGet (such as
glGetInteger64i_v), params returns a single value, the start offset
of the binding range for each indexed uniform buffer binding. The
initial value is 0 for all bindings. See glBindBufferRange().
GL_UNPACK_ALIGNMENT
params returns one value, the byte alignment used for reading pixel
data from memory. The initial value is 4. See glPixelStore().
GL_UNPACK_IMAGE_HEIGHT
params returns one value, the image height used for reading pixel
data from memory. The initial is 0. See glPixelStore().
GL_UNPACK_LSB_FIRST
params returns a single boolean value indicating whether single-bit
pixels being read from memory are read first from the least
significant bit of each unsigned byte. The initial value is
GL_FALSE. See glPixelStore().
GL_UNPACK_ROW_LENGTH
params returns one value, the row length used for reading pixel
data from memory. The initial value is 0. See glPixelStore().
GL_UNPACK_SKIP_IMAGES
params returns one value, the number of pixel images skipped before
the first pixel is read from memory. The initial value is 0. See
glPixelStore().
GL_UNPACK_SKIP_PIXELS
params returns one value, the number of pixel locations skipped
before the first pixel is read from memory. The initial value is 0.
See glPixelStore().
GL_UNPACK_SKIP_ROWS
params returns one value, the number of rows of pixel locations
skipped before the first pixel is read from memory. The initial
value is 0. See glPixelStore().
GL_UNPACK_SWAP_BYTES
params returns a single boolean value indicating whether the bytes
of two-byte and four-byte pixel indices and components are swapped
after being read from memory. The initial value is GL_FALSE. See
glPixelStore().
GL_VERTEX_PROGRAM_POINT_SIZE
params returns a single boolean value indicating whether vertex
program point size mode is enabled. If enabled, and a vertex shader
is active, then the point size is taken from the shader built-in
gl_PointSize. If disabled, and a vertex shader is active, then the
point size is taken from the point state as specified by
glPointSize(). The initial value is GL_FALSE.
GL_VERTEX_BINDING_DIVISOR
Accepted by the indexed forms. params returns a single integer
value representing the instance step divisor of the first element
in the bound buffer's data store for vertex attribute bound to
index.
GL_VERTEX_BINDING_OFFSET
Accepted by the indexed forms. params returns a single integer
value representing the byte offset of the first element in the
bound buffer's data store for vertex attribute bound to index.
GL_VERTEX_BINDING_STRIDE
Accepted by the indexed forms. params returns a single integer
value representing the byte offset between the start of each
element in the bound buffer's data store for vertex attribute bound
to index.
GL_MAX_VERTEX_ATTRIB_RELATIVE_OFFSET
params returns a single integer value containing the maximum offset
that may be added to a vertex binding offset.
GL_MAX_VERTEX_ATTRIB_BINDINGS
params returns a single integer value containing the maximum number
of vertex buffers that may be bound.
GL_VIEWPORT
When used with non-indexed variants of glGet (such as
glGetIntegerv), params returns four values: the x and y window
coordinates of the viewport, followed by its width and height.
Initially the x and y window coordinates are both set to 0, and the
width and height are set to the width and height of the window into
which the GL will do its rendering. See glViewport(). When used
with indexed variants of glGet (such as glGetIntegeri_v), params
returns four values: the x and y window coordinates of the indexed
viewport, followed by its width and height. Initially the x and y
window coordinates are both set to 0, and the width and height are
set to the width and height of the window into which the GL will do
its rendering. See glViewportIndexedf().
GL_VIEWPORT_BOUNDS_RANGE
params returns two values, the minimum and maximum viewport bounds
range. The minimum range should be at least [-32768, 32767].
GL_VIEWPORT_INDEX_PROVOKING_VERTEX
params returns one value, the implementation dependent specifc
vertex of a primitive that is used to select the viewport index. If
the value returned is equivalent to GL_PROVOKING_VERTEX, then the
vertex selection follows the convention specified by
glProvokingVertex(). If the value returned is equivalent to
GL_FIRST_VERTEX_CONVENTION, then the selection is always taken from
the first vertex in the primitive. If the value returned is
equivalent to GL_LAST_VERTEX_CONVENTION, then the selection is
always taken from the last vertex in the primitive. If the value
returned is equivalent to GL_UNDEFINED_VERTEX, then the selection
is not guaranteed to be taken from any specific vertex in the
primitive.
GL_VIEWPORT_SUBPIXEL_BITS
params returns a single value, the number of bits of sub-pixel
precision which the GL uses to interpret the floating point
viewport bounds. The minimum value is 0.
GL_MAX_ELEMENT_INDEX
params returns a single value, the maximum index that may be
specified during the transfer of generic vertex attributes to the
GL.
Many of the boolean parameters can also be queried more easily using
glIsEnabled().
NOTES
The following parameters return the associated value for the active
texture unit: GL_TEXTURE_1D, GL_TEXTURE_BINDING_1D, GL_TEXTURE_2D,
GL_TEXTURE_BINDING_2D, GL_TEXTURE_3D and GL_TEXTURE_BINDING_3D.
GL_MAX_VIEWPORTS, GL_VIEWPORT_SUBPIXEL_BITS, GL_VIEWPORT_BOUNDS_RANGE,
GL_LAYER_PROVOKING_VERTEX, and GL_VIEWPORT_INDEX_PROVOKING_VERTEX are
available only if the GL version is 4.1 or greater.
GL_MAX_VERTEX_ATOMIC_COUNTERS, GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS,
GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS,
GL_MAX_GEOMETRY_ATOMIC_COUNTERS, GL_MAX_FRAMGENT_ATOMIC_COUNTERS, and
GL_MIN_MAP_BUFFER_ALIGNMENT are accepted by pname only if the GL
version is 4.2 or greater.
GL_MAX_ELEMENT_INDEX is accepted by pname only if the GL version is 4.3
or greater.
GL_MAX_COMPUTE_UNIFORM_BLOCKS, GL_MAX_COMPUTE_TEXTURE_IMAGE_UNITS,
GL_MAX_COMPUTE_UNIFORM_COMPONENTS, GL_MAX_COMPUTE_ATOMIC_COUNTERS,
GL_MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS,
GL_MAX_COMBINED_COMPUTE_UNIFORM_COMPONENTS,
GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS, GL_MAX_COMPUTE_WORK_GROUP_COUNT,
and GL_MAX_COMPUTE_WORK_GROUP_SIZE and
GL_DISPATCH_INDIRECT_BUFFER_BINDING are available only if the GL
version is 4.3 or greater.
GL_MAX_DEBUG_GROUP_STACK_DEPTH, GL_DEBUG_GROUP_STACK_DEPTH and
GL_MAX_LABEL_LENGTH are accepted only if the GL version is 4.3 or
greater.
GL_MAX_UNIFORM_LOCATIONS is accepted only if the GL version is 4.3 or
greater.
GL_MAX_FRAMEBUFFER_WIDTH, GL_MAX_FRAMEBUFFER_HEIGHT,
GL_MAX_FRAMEBUFFER_LAYERS, and GL_MAX_FRAMEBUFFER_SAMPLES are available
only if the GL version is 4.3 or greater.
GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS,
GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS,
GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS,
GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS,
GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS, and
GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS are available only if the GL
version is 4.3 or higher.
GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT is available only if the GL version
is 4.3 or greater.
GL_VERTEX_BINDING_DIVISOR, GL_VERTEX_BINDING_OFFSET,
GL_VERTEX_BINDING_STRIDE, GL_MAX_VERTEX_ATTRIB_RELATIVE_OFFSET and
GL_MAX_VERTEX_ATTRIB_BINDINGS are available only if the GL version is
4.3 or greater.
ERRORS
GL_INVALID_ENUM is generated if pname is not an accepted value.
GL_INVALID_VALUE is generated on any of glGetBooleani_v,
glGetIntegeri_v, or glGetInteger64i_v if index is outside of the valid
range for the indexed state target.
SEE ALSO
glGetActiveUniform(), glGetAttachedShaders(), glGetAttribLocation(),
glGetBufferParameter(), glGetBufferPointerv(), glGetBufferSubData(),
glGetCompressedTexImage(), glGetError(), glGetProgram(),
glGetProgramInfoLog(), glGetQueryiv(), glGetQueryObject(),
glGetShader(), glGetShaderInfoLog(), glGetShaderSource(),
glGetString(), glGetTexImage(), glGetTexLevelParameter(),
glGetTexParameter(), glGetUniform(), glGetUniformLocation(),
glGetVertexAttrib(), glGetVertexAttribPointerv(), glIsEnabled()
COPYRIGHT
Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2011
Khronos Group. This document is licensed under the SGI Free Software B
License. For details, see http://oss.sgi.com/projects/FreeB/.
AUTHORS
opengl.org
opengl.org 03/16/2013 GLGET(3G)
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