View source for GLAPI/glGet

{{infobox feature 
| name = glGet 
| core = 1.0
}}

'''glGet:''' return the value or values of a selected parameter

== Function Definition ==

  void '''glGetBooleanv'''(GLenum {{param|pname}}, GLboolean * {{param|params}});
  void '''glGetDoublev'''(GLenum {{param|pname}}, GLdouble * {{param|params}});
  void '''glGetFloatv'''(GLenum {{param|pname}}, GLfloat * {{param|params}});
  void '''glGetIntegerv'''(GLenum {{param|pname}}, GLint * {{param|params}});
  void '''glGetInteger64v'''(GLenum {{param|pname}}, GLint64 * {{param|params}});

; 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.

== Function Definition ==

  void '''glGetBooleani_v'''(GLenum {{param|pname}}, GLuint {{param|index}}, GLboolean * {{param|data}});
  void '''glGetIntegeri_v'''(GLenum {{param|pname}}, GLuint {{param|index}}, GLint * {{param|data}});
  void '''glGetFloati_v'''(GLenum {{param|pname}}, GLuint {{param|index}}, GLfloat * {{param|data}});
  void '''glGetDoublei_v'''(GLenum {{param|pname}}, GLuint {{param|index}}, GLdouble * {{param|data}});
  void '''glGetInteger64i_v'''(GLenum {{param|pname}}, GLuint {{param|index}}, GLint64 * {{param|data}});

; pname
: Specifies the parameter value to be returned. The symbolic constants in the list below are accepted.
; index
: Specifies the zero-based 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. {{param|pname}} is a symbolic constant indicating the state variable to be returned, and {{param|params}} is a pointer to an array of the indicated type in which to place the returned data.

Type conversion is performed if {{param|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 {{enum|GL_FALSE}} if and only if it is 0.0 (or 0). Otherwise, it is converted to {{enum|GL_TRUE}}. If '''glGetIntegerv''' is called, boolean values are returned as {{enum|GL_TRUE}} or {{enum|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 <!--Missing Equation--> to the most negative representable integer value. If '''glGetFloatv''' or '''glGetDoublev''' is called, boolean values are returned as {{enum|GL_TRUE}} or {{enum|GL_FALSE}}, and integer values are converted to floating-point values.

Many of the boolean parameters can also be queried more easily using {{apifunc|glIsEnabled}}.

The following symbolic constants are accepted by {{param|pname}}:

; {{defenum|GL_CONTEXT_FLAGS}} (integer)
: The flags with which the context was created (such as debugging functionality).

; {{defenum|GL_MAJOR_VERSION}} (integer)
: The major version number of the OpenGL API supported by the current context.

; {{defenum|GL_MAX_SERVER_WAIT_TIMEOUT}} (64-bit integer, at least 0, see {{apifunc|glWaitSync}})
: The maximum {{apifunc|glWaitSync}} timeout interval.

; {{defenum|GL_MIN_MAP_BUFFER_ALIGNMENT}} (integer, at least 64)
: The minimum alignment in basic machine units of pointers returned from{{apifunc|glMapBuffer}} and {{apifunc|glMapBufferRange}}.

; {{defenum|GL_MINOR_VERSION}} (integer)
: The minor version number of the OpenGL API supported by the current context.

; {{defenum|GL_NUM_EXTENSIONS}} (integer, see {{apifunc|glGetString}})
: The number of extensions supported by the GL implementation for the current context.

; {{defenum|GL_NUM_SHADING_LANGUAGE_VERSIONS}} (integer, at least 3, see {{apifunc|glGetString}})
: The number of supported GLSL versions.

; {{defenum|GL_TIMESTAMP}} (GLint64, see {{apifunc|glQueryCounter}})
: The 64-bit value of the current GL time.

The following sections apply to different aspects of GL.

=== Buffer Binding State ===

; {{defenum|GL_ARRAY_BUFFER_BINDING}} (name, initially 0, see {{apifunc|glBindBuffer}})
: The name of the buffer object currently bound to the target {{enum|GL_ARRAY_BUFFER}}. If no buffer object is bound to this target, 0 is returned.

; {{defenum|GL_COPY_READ_BUFFER_BINDING}} (name, initially 0, see {{apifunc|glBindBuffer}})
: The buffer that is currently bound to the copy read bind point, or 0 for none.

; {{defenum|GL_COPY_WRITE_BUFFER_BINDING}} (name, initially 0, see {{apifunc|glBindBuffer}})
: The buffer that is currently bound to the copy write bind point, or 0 for none.

; {{defenum|GL_DRAW_INDIRECT_BUFFER_BINDING}} (name, initially 0, see {{apifunc|glBindBuffer}})
: The name of the buffer object currently bound to the target {{enum|GL_DRAW_INDIRECT_BUFFER}}. If no buffer object is bound to this target, 0 is returned.

; {{defenum|GL_ELEMENT_ARRAY_BUFFER_BINDING}} (name, initially 0, see {{apifunc|glBindBuffer}})
: The name of the buffer object currently bound to the target {{enum|GL_ELEMENT_ARRAY_BUFFER}}. If no buffer object is bound to this target, 0 is returned.

; {{defenum|GL_QUERY_BUFFER_BINDING}} (name, initially 0, see {{apifunc|glBindBuffer}})
: The buffer that is currently bound to the query bind point, or 0 for none.

; {{defenum|GL_TEXTURE_BUFFER_BINDING}} (name, initially 0, see {{apifunc|glBindBuffer}})
: The buffer that is currently bound to the generic texture bind point, or 0 for none.

; {{defenum|GL_VERTEX_ARRAY_BINDING}} (GLint, initially 0, see {{apifunc|glBindVertexArray}})
: The name of the vertex array object currently bound to the context, or 0 if none is bound.

Indexed buffer binding state is controlled through {{apifunc|glBindBufferRange}} with a {{param|target}} that's specific to that bind point.

{| class="wikitable"
|-
! {{enum|GL_<i>type</i>_BUFFER}} !! {{enum|GL_MAX_<i>type</i>_BUFFER_BINDINGS}} !! {{enum|GL_<i>type</i>_BUFFER_BINDING}} !! {{enum|GL_<i>type</i>_BUFFER_START}} !! {{enum|GL_<i>type</i>_BUFFER_SIZE}}
|-
| {{enum|GL_ATOMIC_COUNTER_BUFFER}} || {{defenum|GL_MAX_ATOMIC_COUNTER_BUFFER_BINDINGS}} (min 1) || {{defenum|GL_ATOMIC_COUNTER_BUFFER_BINDING}} || {{defenum|GL_ATOMIC_COUNTER_BUFFER_START}} || {{defenum|GL_ATOMIC_COUNTER_BUFFER_SIZE}}
|-
| {{enum|GL_SHADER_STORAGE_BUFFER}} || {{defenum|GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS}} (min 8) || {{defenum|GL_SHADER_STORAGE_BUFFER_BINDING}} || {{defenum|GL_SHADER_STORAGE_BUFFER_START}} || {{defenum|GL_SHADER_STORAGE_BUFFER_SIZE}}
|-
| {{enum|GL_TRANSFORM_FEEDBACK_BUFFER}} || {{defenum|GL_MAX_TRANSFORM_FEEDBACK_BUFFER_BINDINGS}} || {{defenum|GL_TRANSFORM_FEEDBACK_BUFFER_BINDING}} || {{defenum|GL_TRANSFORM_FEEDBACK_BUFFER_START}} || {{defenum|GL_TRANSFORM_FEEDBACK_BUFFER_SIZE}}
|-
| {{enum|GL_UNIFORM_BUFFER}} || {{defenum|GL_MAX_UNIFORM_BUFFER_BINDINGS}} (min 84) || {{defenum|GL_UNIFORM_BUFFER_BINDING}} || {{defenum|GL_UNIFORM_BUFFER_START}} || {{defenum|GL_UNIFORM_BUFFER_SIZE}}
|}

In the following, ''n'' refers to the value of {{enum|GL_MAX_<i>type</i>_BUFFER_BINDINGS}}.

; {{enum|GL_MAX_<i>type</i>_BUFFER_BINDINGS}} (integer)
: The maximum number of buffer bindings.

; {{defenum|GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS}} (integer, minimum is 8)
: The maximum number of shader storage buffer binding points on the context.

; {{enum|GL_<i>type</i>_BUFFER_BINDING}} (name, initially 0, see {{apifunc|glBindBuffer}})
: The current name of the buffer binding, or 0 for none.

; {{enum|GL_<i>type</i>_BUFFER_BINDING}} (indexed[''n''] name, initially 0, see {{apifunc|glBindBufferRange}})
: The current name of the buffer binding for each binding point, or 0 for none.

; {{enum|GL_<i>type</i>_BUFFER_START}} (indexed[''n''] 64-bit integer, initially 0, see {{apifunc|glBindBufferRange}})
: The starting offset of the binding range for each buffer.

; {{enum|GL_<i>type</i>_BUFFER_SIZE}} (indexed[''n''] 64-bit integer, initially 0, see {{apifunc|glBindBufferRange}})
: The size of the binding range for each buffer.

; {{defenum|GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS}} (integer, at least 64)
: The maximum number of components to write to a single buffer in interleaved mod.

; {{defenum|GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS}} (integer, at least 4)
: The maximum number of separate attributes or outputs that can be captured in transform feedback.

; {{defenum|GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS}} (integer, at least 4)
: The maximum number of buffer objects to write with transform feedback.

; {{defenum|GL_TRANSFORM_FEEDBACK_PAUSED}} (boolean, initially {{enum|GL_FALSE}})
: Whether transform feedback is paused on this object.

; {{defenum|GL_TRANSFORM_FEEDBACK_ACTIVE}} (boolean, initially {{enum|GL_FALSE}})
: Whether transform feedback is active on this object.

=== Debug Output State ===

See {{glref44|chapter 20|490}} and {{glref44|table 23.67|588}}.

; {{defenum|GL_DEBUG_GROUP_STACK_DEPTH}} (GLint, initially 1)
: The current depth of the debug message group stack.

; {{defenum|GL_DEBUG_LOGGED_MESSAGES}} (GLint)
: The number of messages currently in the debug message log.

; {{defenum|GL_DEBUG_NEXT_LOGGED_MESSAGE_LENGTH}} (GLint)
: The string length of the oldest debug message in the debug message log, or 0 if there are no strings.

; {{defenum|GL_DEBUG_OUTPUT}} (GLboolean, see {{apifunc|glIsEnabled}})
: The enabled state for debug output functionality. The initial value is {{enum|GL_TRUE}} if this is a debug context, and {{enum|GL_FALSE}} otherwise.

; {{defenum|GL_DEBUG_OUTPUT_SYNCHRONOUS}} (GLboolean, initially {{enum|GL_FALSE}}, see {{apifunc|glIsEnabled}})
: The enabled state for synchronous debug message callbacks.

; {{defenum|GL_MAX_DEBUG_LOGGED_MESSAGES}} (GLint, at least 1)
: The maximum number of messages stored in the debug message log.

; {{defenum|GL_MAX_DEBUG_MESSAGE_LENGTH}} (GLint, at least 1)
: The maximum length of a debug message string, including its NUL terminator.

; {{defenum|GL_MAX_DEBUG_GROUP_STACK_DEPTH}} (GLint, at least 64)
: The maximum depth of the debug message group stack.

; {{defenum|GL_MAX_LABEL_LENGTH}} (GLint, at least 256, see {{apifunc|glObjectLabel}} and {{apifunc|glObjectPtrLabel}})
: The maximum length of a label string that may be assigned to an object.

=== Framebuffers ===

; {{defenum|GL_COLOR_CLEAR_VALUE}} (GLfloat[4], initially (0.0, 0.0, 0.0, 0.0), see {{apifunc|glClearColor}})
: 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.

; {{defenum|GL_COLOR_WRITEMASK}} (singualar or indexed[value of [[#GL_MAX_DRAW_BUFFERS|{{enum|MAX_DRAW_BUFFERS}}]]] GLboolean[4], initially ({{enum|GL_TRUE}}, {{enum|GL_TRUE}}, {{enum|GL_TRUE}}, {{enum|GL_TRUE}}), see {{apifunc|glColorMask}})
: The red, green, blue, and alpha write enables for the color buffers. The single form reads from the first attached color buffer.

; {{defenum|GL_DEPTH_CLEAR_VALUE}} (GLfloat, initially 1, see {{apifunc|glClearDepth}})
: 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.

; {{defenum|GL_DEPTH_FUNC}} (GLenum, initially {{enum|GL_LESS}}, see {{apifunc|glDepthFunc}})
: The depth comparison function.

; {{defenum|GL_DEPTH_TEST}} (GLboolean, initially {{enum|GL_FALSE}}, see {{apifunc|glDepthFunc}} and {{apifunc|glDepthRange}})
: Whether depth testing of fragments is enabled.

; {{defenum|GL_DEPTH_WRITEMASK}} (GLboolean, initially {{enum|GL_FALSE}}, see {{apifunc|glDepthMask}})
: If the depth buffer is enabled for writing.

; {{defenum|GL_DOUBLEBUFFER}} (GLboolean)
: Whether double buffering is supported.

; {{defenum|GL_DRAW_BUFFER}} (GLenum, see {{apifunc|glDrawBuffer}})
: Which buffers are being drawn to. This is selected from the currently bound {{enum|GL_DRAW_FRAMEBUFFER}}. See {{apifunc|glDrawBuffer}}. The initial value is {{enum|GL_BACK}} if there are back buffers, otherwise it is {{enum|GL_FRONT}}.

; {{defenum|GL_DRAW_BUFFERi}} (symbolic constant, see {{apifunc|glDrawBuffers}})
: {{param|params}} returns one value, a symbolic constant indicating which buffers are being drawn to by the corresponding output color. This is selected from the currently bound {{enum|GL_DRAW_FRAMEBUFFER}} The initial value of {{enum|GL_DRAW_BUFFER0}} is {{enum|GL_BACK}} if there are back buffers, otherwise it is {{enum|GL_FRONT}}. The initial values of draw buffers for all other output colors is {{enum|GL_NONE}}. ''i'' can be from 0 up to the value of [[#GL_MAX_DRAW_BUFFERS|{{enum|MAX_DRAW_BUFFERS}}]] minus one.

; {{defenum|GL_DRAW_FRAMEBUFFER_BINDING}} (name, initially 0, see {{apifunc|glBindFramebuffer}})
: The framebuffer object currently bound to the {{enum|GL_DRAW_FRAMEBUFFER}} target. If the default framebuffer is bound, this value will be zero.

; {{defenum|GL_MAX_COLOR_ATTACHMENTS}} (integer, at least 8)
: Maximum number of framebuffer attachment points for color buffers.

; {{defenum|GL_MAX_COLOR_TEXTURE_SAMPLES}} (integer, at least 1)
: The maximum number of samples for all color formats in a multisample texture.

; {{defenum|GL_MAX_DEPTH_TEXTURE_SAMPLES}} (integer, at least 1)
: The maximum number of samples in a multisample depth or depth-stencil texture.

; {{defenum|GL_MAX_DRAW_BUFFERS}} (integer, at least 8, see {{apifunc|glDrawBuffers}})
: The maximum number of simultaneous outputs that may be written in a fragment shader.

; {{defenum|GL_MAX_DUAL_SOURCE_DRAW_BUFFERS}} (integer, at least 1, see {{apifunc|glBlendFunc}} and {{apifunc|glBlendFuncSeparate}})
: The maximum number of active draw buffers when using dual-source blending.

; {{defenum|GL_MAX_FRAMEBUFFER_HEIGHT}} (integer, at least 16384, see {{apifunc|glFramebufferParameter}})
: The maximum height for a framebuffer that has no attachments.

; {{defenum|GL_MAX_FRAMEBUFFER_LAYERS}} (integer, at least 2048, see {{apifunc|glFramebufferParameter}})
: The maximum number of layers for a framebuffer that has no attachments.

; {{defenum|GL_MAX_FRAMEBUFFER_SAMPLES}} (integer, at least 4, see {{apifunc|glFramebufferParameter}})
: The maximum samples in a framebuffer that has no attachments.

; {{defenum|GL_MAX_FRAMEBUFFER_WIDTH}} (integer, at least 16384, see {{apifunc|glFramebufferParameter}})
: The maximum width for a framebuffer that has no attachments.

; {{defenum|GL_MAX_INTEGER_SAMPLES}} (integer, at least 1)
: The maximum number of samples supported in integer format multisample buffers.

; {{defenum|GL_MAX_SAMPLES}} (integer, at least 4)
; The maximum number of samples supported for all non-integer formats.

; {{defenum|GL_READ_BUFFER}} (symbolic constant, initial value below, see {{apifunc|glReadPixels}}
: {Which color buffer is selected for reading. The initial value is {{enum|GL_BACK}} if there is a back buffer, otherwise it is {{enum|GL_FRONT}}. This is selected from the currently bound {{enum|GL_READ_FRAMEBUFFER}}.

; {{defenum|GL_READ_FRAMEBUFFER_BINDING}} (name, intially 0, see {{apifunc|glBindFramebuffer}})
: The framebuffer object currently bound to the {{enum|GL_READ_FRAMEBUFFER}} target. If the default framebuffer is bound, this value will be zero.

; {{defenum|GL_RENDERBUFFER_BINDING}} (name, initially 0, see {{apifunc|glBindRenderbuffer}})
: The name of the renderbuffer object currently bound to the target {{enum|GL_RENDERBUFFER}}. If no renderbuffer object is bound to this target, 0 is returned.

; {{defenum|GL_STENCIL_BACK_FAIL}} (symbolic constant, initially {{enum|GL_KEEP}}, see {{apifunc|glStencilOpSeparate}})
: What action is taken for back-facing polygons when the stencil test fails.

; {{defenum|GL_STENCIL_BACK_FUNC}} (symbolic constant, initially {{enum|GL_ALWAYS}}, see {{apifunc|glStencilFuncSeparate}})
: What function is used for back-facing polygons to compare the stencil reference value with the stencil buffer value.

; {{defenum|GL_STENCIL_BACK_PASS_DEPTH_FAIL}} (symbolic constant, initially {{enum|GL_KEEP}}, see {{apifunc|glStencilOpSeparate}})
: What action is taken for back-facing polygons when the stencil test passes, but the depth test fails.

; {{defenum|GL_STENCIL_BACK_PASS_DEPTH_PASS}} (symbolic constant, initially {{enum|GL_KEEP}}, see {{apifunc|glStencilOpSeparate}})
: What action is taken for back-facing polygons when the stencil test passes and the depth test passes.

; {{defenum|GL_STENCIL_BACK_REF}} (integer, initially 0, see {{apifunc|glStencilFuncSeparate}})
: The reference value that is compared with the contents of the stencil buffer for back-facing polygons.

; {{defenum|GL_STENCIL_BACK_VALUE_MASK}} (integer, initially ~0 (all ones), see {{apifunc|glStencilFuncSeparate}})
: 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.

; {{defenum|GL_STENCIL_BACK_WRITEMASK}} (integer, initially ~0 (all ones), see {{apifunc|glStencilMaskSeparate}})
: The mask that controls writing of the stencil bitplanes for back-facing polygons.

; {{defenum|GL_STENCIL_CLEAR_VALUE}} (integer, initially 0)
: The index to which the stencil bitplanes are cleared. See {{apifunc|glClearStencil}}.

; {{defenum|GL_STENCIL_FAIL}} (symbolic constant, initially {{enum|GL_KEEP}}, see {{apifunc|glStencilOp}})
: What action is taken when the stencil test fails. This stencil state only affects non-polygons and front-facing polygons. Back-facing polygons use separate stencil state. See {{apifunc|glStencilOpSeparate}}.

; {{defenum|GL_STENCIL_FUNC}} (symbolic constant, initially {{enum|GL_ALWAYS}})
: What function is used to compare the stencil reference value with the stencil buffer value. See {{apifunc|glStencilFunc}}. This stencil state only affects non-polygons and front-facing polygons. Back-facing polygons use separate stencil state. See {{apifunc|glStencilFuncSeparate}} and [[#GL_STENCIL_BACKFUNC|{{enum|GL_STENCIL_BACK_FUNC}}]].

; {{defenum|GL_STENCIL_PASS_DEPTH_FAIL}} (symbolic constant, initially {{enum|GL_KEEP}}, see {{apifunc|glStencilOp}})
: What action is taken when the stencil test passes, but the depth test fails. This stencil state only affects non-polygons and front-facing polygons. Back-facing polygons use separate stencil state. See {{apifunc|glStencilOpSeparate}}.

; {{defenum|GL_STENCIL_PASS_DEPTH_PASS}} (symbolic constant, initially {{enum|GL_KEEP}}, see {{apifunc|glStencilOp}})
: What action is taken when the stencil test passes and the depth test passes. This stencil state only affects non-polygons and front-facing polygons. Back-facing polygons use separate stencil state. See {{apifunc|glStencilOpSeparate}}.

; {{defenum|GL_STENCIL_REF}} (integer, initially 0, see {{apifunc|glStencilFunc}})
: The reference value that is compared with the contents of the stencil buffer. This stencil state only affects non-polygons and front-facing polygons. Back-facing polygons use separate stencil state. See {{apifunc|glStencilFuncSeparate}}.

; {{defenum|GL_STENCIL_TEST}} (boolean, initially {{enum|GL_FALSE}}, see {{apifunc|glIsEnabled}})
: Whether stenciling is enabled.

; {{defenum|GL_STENCIL_VALUE_MASK}} (integer, initially ~0 (all ones), see {{apifunc|glStencilFunc}})
: The mask that is used to mask both the stencil reference value and the stencil buffer value before they are compared. This stencil state only affects non-polygons and front-facing polygons. Back-facing polygons use separate stencil state. See {{apifunc|glStencilFuncSeparate}}.

; {{defenum|GL_STENCIL_WRITEMASK}} (integer, initially ~0 (all ones), see {{apifunc|glStencilMask}})
: The mask that controls writing of the stencil bitplanes. This stencil state only affects non-polygons and front-facing polygons. Back-facing polygons use separate stencil state. See {{apifunc|glStencilMaskSeparate}}.

; {{defenum|GL_STEREO}} (boolean)
: Whether stereo buffers (left and right) are supported.

=== Hints ===

See {{apifunc|glHint}}. The initial values are always {{enum|GL_DONT_CARE}}.

; {{defenum|GL_FRAGMENT_SHADER_DERIVATIVE_HINT}} (enumeration, initially {{enum|GL_DONT_CARE}}, see {{apifunc|glHint}})
: A symbolic constant indicating the mode of the derivative calculations of {{enum|dFdx}}, {{enum|dFdy}}, and {{enum|fwidth}} for fragment shaders.

; {{defenum|GL_LINE_SMOOTH_HINT}} (symbolic constant, initially {{enum|GL_DONT_CARE}}, see {{apifunc|glHint}})
: The mode of the line antialiasing hint.

; {{defenum|GL_POLYGON_SMOOTH_HINT}} (symbolic constant, initially {{enum|GL_DONT_CARE}}, see {{apifunc|glHint}})
: The mode of the polygon antialiasing hint.

; {{defenum|GL_TEXTURE_COMPRESSION_HINT}} (symbolic constant, initially {{enum|GL_DONT_CARE}}, see {{apifunc|glHint}})
: The mode of the texture compression hint.

=== Image State ===

Indexed parameters set by {{apifunc|glBindImageTexture}}. See {{glref44|table 23.45|566}}

; {{defenum|GL_IMAGE_BINDING_ACCESS}} (indexed[value of [[#GL_MAX_IMAGE_UNITS|{{enum|GL_MAX_IMAGE_UNITS}}]]] symbolic constant, initially {{enum|GL_READ_ONLY}})
: The read and/or write access for the bound texture.

; {{defenum|GL_IMAGE_BINDING_FORMAT}} (indexed[value of [[#GL_MAX_IMAGE_UNITS|{{enum|GL_MAX_IMAGE_UNITS}}]]] integer, initially {{enum|GL_R8}}, see {{apifunc|glBindImageTexture}})
: The format used for accesses to bound textures.

; {{defenum|GL_IMAGE_BINDING_NAME}} (indexed[value of [[#GL_MAX_IMAGE_UNITS|{{enum|GL_MAX_IMAGE_UNITS}}]]] name, initially 0)
: The name of the bound texture object.

; {{defenum|GL_IMAGE_BINDING_LAYER}} (indexed[value of [[#GL_MAX_IMAGE_UNITS|{{enum|GL_MAX_IMAGE_UNITS}}]]] integer, initially 0)
: The layer of the bound texture, if not layered.

; {{defenum|GL_IMAGE_BINDING_LAYERED}} (indexed[value of [[#GL_MAX_IMAGE_UNITS|{{enum|GL_MAX_IMAGE_UNITS}}]]] boolean, initially {{enum|GL_FALSE}})
: Whether the texture object is bound with multiple layers.

; {{defenum|GL_IMAGE_BINDING_LEVEL}} (indexed[value of [[#GL_MAX_IMAGE_UNITS|{{enum|GL_MAX_IMAGE_UNITS}}]]] integer, initially 0)
: The level of the bound texture object.

=== Multisampling ===

See {{enumapifunc|glIsEnabled|GL_MULTISAMPLE}}, {{enumapifunc|glIsEnabled|GL_SAMPLE_ALPHA_TO_COVERAGE}}, {{enumapifunc|glIsEnabled|GL_SAMPLE_ALPHA_TO_ONE}}, {{enumapifunc|glIsEnabled|GL_SAMPLE_COVERAGE}}, {{enumapifunc|glIsEnabled|GL_SAMPLE_MASK}}.

; {{defenum|GL_MAX_SAMPLE_MASK_WORDS}} (integer, at least 1)
: The maximum number of sample mask words.

; {{defenum|GL_MULTISAMPLE}} (boolean, initially {{enum|GL_TRUE}}, see {{apifunc|glSampleCoverage}})
: Whether to use multisample rasterization.

; {{defenum|GL_SAMPLE_ALPHA_TO_COVERAGE}} (boolean, initially {{enum|GL_FALSE}}, see {{apifunc|glSampleCoverage}})
: Whether to modify coverage from alpha.

; {{defenum|GL_SAMPLE_ALPHA_TO_ONE}} (boolean, initially {{enum|GL_FALSE}}, see {{apifunc|glSampleCoverage}})
: Whether to set alpha to max.

; {{defenum|GL_SAMPLE_BUFFERS}} (integer, at least 0, see {{apifunc|glSampleCoverage}})
: The number of sample buffers associated with the framebuffer.

; {{defenum|GL_SAMPLE_COVERAGE}} (boolean, initially {{enum|GL_FGALSE}}, see {{apifunc|glSampleCoverage}})
: Whether to use a mask to modify coverage.

; {{defenum|GL_SAMPLE_COVERAGE_INVERT}} (boolean, initially {{enum|GL_FALSE}}, see {{apifunc|glSampleCoverage}})
: Whether to invert coverage mask value.

; {{defenum|GL_SAMPLE_COVERAGE_VALUE}} (float, initially 1, see {{apifunc|glSampleCoverage}})
: The sample coverage mask value.

; {{defenum|GL_SAMPLE_MASK}} (boolean, initially {{enum|GL_TRUE}}, see {{apifunc|glSampleCoverage}})
: Whether use of the the sample mask is enabled.

; {{defenum|GL_SAMPLE_MASK_VALUE}} (indexed[n] integer, initially ~0 (all bits set), see {{apifunc|glSampleMask}})
: Indexed; the fragment coverage of a sample mask value. The number of elements may be returned with {{enumapifunc|glGet|GL_MAX_SAMPLE_MASK_WORDS}}.

; {{defenum|GL_SAMPLES}} (integer, at least 0, see {{apifunc|glSampleCoverage}})
: The coverage mask size.

=== Pixel Operations ===

The blend operations all have single or indexed forms, for when there are more than one color buffers. The non-indexed forms return the first color buffer's settings.

; {{defenum|GL_BLEND}} (single or indexed[value of [[#GL_MAX_DRAW_BUFFERS|{{enum|MAX_DRAW_BUFFERS}}]]] boolean, initially {{enum|GL_FALSE}}, see {{apifunc|glBlendFunc}})
: Whether blending is enabled.

; {{defenum|GL_BLEND_COLOR}} (single or indexed[value of [[#GL_MAX_DRAW_BUFFERS|{{enum|MAX_DRAW_BUFFERS}}]]] float[4], initially (0.0, 0.0, 0.0, 0.0), see {{apifunc|glBlendColor}})
: The red, green, blue, and alpha values which are the components of the blend color.

; {{defenum|GL_BLEND_DST_ALPHA}}
: {{param|params}} returns one value, the symbolic constant identifying the alpha destination blend function. The initial value is {{enum|GL_ZERO}}. See {{apifunc|glBlendFunc}} and {{apifunc|glBlendFuncSeparate}}.

; {{defenum|GL_BLEND_DST_RGB}} (single or indexed[value of [[#GL_MAX_DRAW_BUFFERS|{{enum|MAX_DRAW_BUFFERS}}]]] symbolic constant, initially {{enum|GL_ZERO}}
: {{param|params}} returns one value, the symbolic constant identifying the RGB destination blend function. The initial value is {{enum|GL_ZERO}}. See {{apifunc|glBlendFunc}} and {{apifunc|glBlendFuncSeparate}}.

; {{defenum|GL_BLEND_EQUATION_RGB}} (single or indexed[value of [[#GL_MAX_DRAW_BUFFERS|{{enum|MAX_DRAW_BUFFERS}}]]] symbolic constant, initially {{enum|GL_FUNC_ADD}}, see {{apifunc|glBlendEquationSeparate}})
: The RGB blend equation selection.

; {{defenum|GL_BLEND_EQUATION_ALPHA}} (single or indexed[value of [[#GL_MAX_DRAW_BUFFERS|{{enum|MAX_DRAW_BUFFERS}}]]] symbolic constant, initially {{enum|GL_FUNC_ADD}}, see {{apifunc|glBlendEquationSeparate}})
: The Alpha blend equation selection.

; {{defenum|GL_BLEND_SRC_ALPHA}} (single or indexed[value of [[#GL_MAX_DRAW_BUFFERS|{{enum|MAX_DRAW_BUFFERS}}]]] symbolic constant, initially {{enum|GL_ONE}}, see {{apifunc|glBlendFunc}} and {{apifunc|glBlendFuncSeparate}})
: The alpha source blend function.

; {{defenum|GL_BLEND_SRC_RGB}} (single or indexed[value of [[#GL_MAX_DRAW_BUFFERS|{{enum|MAX_DRAW_BUFFERS}}]]] symbolic constant, initially {{enum|GL_ONE}}, see {{apifunc|glBlendFunc}} and {{apifunc|glBlendFuncSeparate}})
: The RGB source blend function.

; {{defenum|GL_COLOR_LOGIC_OP}} (boolean, initially {{enum|GL_FALSE}}, see {{apifunc|glLogicOp}})
: Whether a fragment's RGBA color values are merged into the framebuffer using a logical operation.

; {{defenum|GL_DITHER}} (boolean, initially {{enum|GL_TRUE}})
: Whether dithering of fragment colors and indices is enabled.

; {{defenum|GL_LOGIC_OP_MODE}} (symbolic constant, initially {{enum|GL_COPY}}, see {{apifunc|glLogicOp}})
: The selected logic operation mode.

; {{defenum|GL_SCISSOR_BOX}} (indexed[value of [[#GL_MAX_VIEWPORTS|{{enum|GL_MAX_VIEWPORTS}}]]] float[4], see {{apifunc|glScissor}})
: 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 {{apifunc|glScissor}}. Using this name with the non-indexed ''glGet'' returns the first scissor box.

; {{defenum|GL_SCISSOR_TEST}} (indexed[value of [[#GL_MAX_VIEWPORTS|{{enum|GL_MAX_VIEWPORTS}}]]] boolean, initially {{enum|GL_FALSE}}, see {{apifunc|glScissor}})
: Whether scissoring is enabled for this viewport.

=== Pixel Transfer Operations ===

See {{glref44|table 23.28|549}}.

; {{defenum|GL_CLAMP_READ_COLOR}} (enumeration, initially {{enum|GL_FIXED_ONLY}}, see {{apifunc|glClampColor}})
: The read color clamping.

; {{defenum|GL_IMPLEMENTATION_COLOR_READ_FORMAT}} (symbolic constant, default {{enum|GL_RGBA}}, see {{apifunc|glReadPixels}})
: The implementation's preferred pixel data format.

; {{defenum|GL_IMPLEMENTATION_COLOR_READ_TYPE}} (symbolic constant, default {{enum|GL_UNSIGNED_BYTE}}, see {{apifunc|glReadPixels}})
: The implementation's preferred pixel data type.

; {{defenum|GL_PACK_ALIGNMENT}} (integer, initially 4, see {{apifunc|glPixelStore}})
: The byte alignment used for writing pixel data to memory.

; {{defenum|GL_PACK_COMPRESSED_BLOCK_DEPTH}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The compressed block depth in pixels.

; {{defenum|GL_PACK_COMPRESSED_BLOCK_HEIGHT}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The compressed block height in pixels.

; {{defenum|GL_PACK_COMPRESSED_BLOCK_SIZE}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The compressed block size in bytes.

; {{defenum|GL_PACK_COMPRESSED_BLOCK_WIDTH}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The compressed block width in pixels.

; {{defenum|GL_PACK_IMAGE_HEIGHT}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The image height used for writing pixel data to memory.

; {{defenum|GL_PACK_LSB_FIRST}} (boolean, initially {{enum|GL_FALSE}}, see {{apifunc|glPixelStore}})
: Whether single-bit pixels being written to memory are written first to the least significant bit of each unsigned byte.

; {{defenum|GL_PACK_ROW_LENGTH}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The row length used for writing pixel data to memory.

; {{defenum|GL_PACK_SKIP_IMAGES}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The number of pixel images skipped before the first pixel is written into memory.

; {{defenum|GL_PACK_SKIP_PIXELS}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The number of pixel locations skipped before the first pixel is written into memory.

; {{defenum|GL_PACK_SKIP_ROWS}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The number of rows of pixel locations skipped before the first pixel is written into memory.

; {{defenum|GL_PACK_SWAP_BYTES}} (boolean, initially {{enum|GL_FALSE}}, see {{apifunc|glPixelStore}})
: Whether the bytes of two-byte and four-byte pixel indices and components are swapped before being written to memory.

; {{defenum|GL_PIXEL_PACK_BUFFER_BINDING}} (name, initially 0, see {{apifunc|glBindBuffer}})
: The name of the buffer object currently bound to the target {{enum|GL_PIXEL_PACK_BUFFER}}, or 0 if none is bound.

; {{defenum|GL_PIXEL_UNPACK_BUFFER_BINDING}} (name, intiially 0, see {{apifunc|glBindBuffer}})
: The name of the buffer object currently bound to the target {{enum|GL_PIXEL_UNPACK_BUFFER}}, or 0 is none is bound.

; {{defenum|GL_UNPACK_ALIGNMENT}} (integer, initially 4, see {{apifunc|glPixelStore}})
: The byte alignment used for reading pixel data from memory.

; {{defenum|GL_UNPACK_COMPRESSED_BLOCK_DEPTH}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The compressed block depth in pixels.

; {{defenum|GL_UNPACK_COMPRESSED_BLOCK_HEIGHT}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The compressed block height in pixels.

; {{defenum|GL_UNPACK_COMPRESSED_BLOCK_SIZE}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The compressed block size in bytes.

; {{defenum|GL_UNPACK_COMPRESSED_BLOCK_WIDTH}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The compressed block width in pixels.

; {{defenum|GL_UNPACK_IMAGE_HEIGHT}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The image height used for reading pixel data from memory.

; {{defenum|GL_UNPACK_LSB_FIRST}} (boolean, initially {{enum|GL_FALSE}}, see {{apifunc|glPixelStore}})
: Whether single-bit pixels being read from memory are read first from the least significant bit of each unsigned byte.

; {{defenum|GL_UNPACK_ROW_LENGTH}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The row length used for reading pixel data from memory.

; {{defenum|GL_UNPACK_SKIP_IMAGES}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The number of pixel images skipped before the first pixel is read from memory.

; {{defenum|GL_UNPACK_SKIP_PIXELS}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The number of pixel locations skipped before the first pixel is read from memory.

; {{defenum|GL_UNPACK_SKIP_ROWS}} (integer, initially 0, see {{apifunc|glPixelStore}})
: The number of rows of pixel locations skipped before the first pixel is read from memory.

; {{defenum|GL_UNPACK_SWAP_BYTES}}
: {{param|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 {{enum|GL_FALSE}}. See {{apifunc|glPixelStore}}.

=== Programs ===

This sections contains parameters relevant to programs and common to shader execution. See {{glref44|table 23.63|584}}.

; {{defenum|GL_CURRENT_PROGRAM}} (name, initially 0, see {{apifunc|glUseProgram}})
: The name of the program object that is currently active, or 0 if no program object is active.

; {{defenum|GL_MAX_ATOMIC_COUNTER_BUFFER_SIZE}} (integer, minimum is 32)
: The maximum size in basic machine units of an atomic counter buffer.

; {{defenum|GL_MAX_COMBINED_SHADER_OUTPUT_RESOURCES}} (integer, minimum is 8)
: The limit on active image units and fragment outputs.

; {{defenum|GL_MAX_COMBINED_SHADER_STORAGE_BLOCKS}} (integer, minimum is 8)
: The number of shader storage blocks accessible by a program.

; {{defenum|GL_MAX_IMAGE_SAMPLES}} (integer, minimum is 0)
: The maximum number of allowed samples for a texture level bound to an image unit.

; {{defenum|GL_MAX_IMAGE_UNITS}} (integer, minimum is 8)
: The number of units for image load, store, and atomic functions.

; {{defenum|GL_MAX_PROGRAM_TEXEL_OFFSET}} (integer, minimum is 7)
: The maximum texel offset allowed in a texture lookup.

; {{defenum|GL_MAX_SHADER_STORAGE_BLOCK_SIZE}} (64-bit integer, minimum is 2<sup>24</sup> (16,777,216))
: The maximum size in basic machine units of a shader storage block.

; {{defenum|GL_MAX_SUBROUTINES}} (integer, minimum is 256)
: The maximum number of subroutines per shader stage.

; {{defenum|GL_MAX_SUBROUTINE_UNIFORM_LOCATIONS}} (integer, minimum is 1024)
: The maximum number of subroutine uniform locations per shader stage.

; {{defenum|GL_MAX_UNIFORM_BLOCK_SIZE}} (integer, minimum is 16384)
: The maximum size in basic machine units of a uniform block.

; {{defenum|GL_MAX_UNIFORM_LOCATIONS}} (integer, minimum is 1024)
: The maximum number of explicitly assignable uniform locations.

; {{defenum|GL_MAX_VARYING_VECTORS}} (integer, minimum is 15)
: The number of four-component vectors for varying variables.

; {{defenum|GL_MAX_VERTEX_ATTRIB_RELATIVE_OFFSET}} (integer, minimum is 2047)
: The maximum offset that may be added to a vertex binding offset.

; {{defenum|GL_MAX_VERTEX_ATTRIB_BINDINGS}} (integer, minimum is 16)
: The maximum number of vertex buffers that may be bound.

; {{defenum|GL_MAX_VERTEX_ATTRIB_STRIDE}} (integer, minimum is 2048, see {{apifunc|glVertexAttribPointer}})
: The maximum vertex attribute stride.

; {{defenum|GL_MIN_PROGRAM_TEXEL_OFFSET}} (integer, maximum is -8)
: The minimum texel offset allowed in a texture lookup.

; {{defenum|GL_NUM_PROGRAM_BINARY_FORMATS}} (integer, at least 0)
: The number of program binary formats supported by the implementation and returned from [[#GL_PROGRAM_BINARY_FORMATS|{{enum|GL_PROGRAM_BINARY_FORMATS}}]]

; {{defenum|GL_NUM_SHADER_BINARY_FORMATS}} (integer, at least 0)
: The number of shader binary formats supported by the implementation and returned from [[#GL_SHADER_BINARY_FORMATS|{{enum|GL_SHADER_BINARY_FORMATS}}]]

; {{defenum|GL_PROGRAM_BINARY_FORMATS}} (integer[value of [[#GL_NUM_PROGRAM_BINARY_FORMATS|{{enum|GL_NUM_PROGRAM_BINARY_FORMATS}}]]])
: An array of {{enum|GL_NUM_PROGRAM_BINARY_FORMATS}} values, indicating the program binary formats supported by the implementation.

; {{defenum|GL_PROGRAM_PIPELINE_BINDING}} (name, initially 0, see {{apifunc|glBindProgramPipeline}})
: The name of the currently bound program pipeline object, or 0 if no program pipeline object is bound.

; {{defenum|GL_SHADER_BINARY_FORMATS}} (integer[value of [[#GL_NUM_SHADER_BINARY_FORMATS|{{enum|GL_NUM_SHADER_BINARY_FORMATS}}]]])
: An array of {{enum|GL_NUM_SHADER_BINARY_FORMATS}} values, indicating the shader binary formats supported by the implementation.

; {{defenum|GL_SHADER_COMPILER}} (boolean, always {{enum|GL_TRUE}})
: Whether an online shader compiler is present in the implementation. All desktop OpenGL implementations must support online shader compilations, and therefore the value of {{enum|GL_SHADER_COMPILER}} will always be {{enum|GL_TRUE}}.

; {{defenum|GL_SHADER_STORAGE_BUFFER_OFFSET_ALIGNMENT}} (integer, defaults to 256, see {{apifunc|glShaderStorageBlockBinding}})
: The minimum required alignment for shader storage buffer sizes and offset.

; {{defenum|GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT}} (integer, defaults to 1, see {{apifunc|glUniformBlockBinding}})
: The minimum required alignment for uniform buffer sizes and offset.

=== Provoking Vertices ===

; {{defenum|GL_VIEWPORT_INDEX_PROVOKING_VERTEX}} (enumeration, see {{apifunc|glProvokingVertex}})
: {{param|params}} returns one value, the implementation dependent specifc vertex of a primitive that is used to select the viewport index and ''gl_ViewportIndex''. If the value returned is equivalent to {{enum|GL_PROVOKING_VERTEX}}, then the vertex selection follows the convention specified by {{apifunc|glProvokingVertex}}. If the value returned is equivalent to {{enum|GL_FIRST_VERTEX_CONVENTION}}, then the selection is always taken from the first vertex in the primitive. If the value returned is equivalent to {{enum|GL_LAST_VERTEX_CONVENTION}}, then the selection is always taken from the last vertex in the primitive. If the value returned is equivalent to {{enum|GL_UNDEFINED_VERTEX}}, then the selection is not guaranteed to be taken from any specific vertex in the primitive.

; {{defenum|GL_LAYER_PROVOKING_VERTEX}} (enumeration, see {{apifunc|glProvokingVertex}})
: The implementation dependent specific vertex of a primitive that is used to select the rendering layer and ''gl_Layer''. If the value returned is equivalent to {{enum|GL_PROVOKING_VERTEX}}, then the vertex selection follows the convention specified by {{apifunc|glProvokingVertex}}. If the value returned is equivalent to {{enum|GL_FIRST_VERTEX_CONVENTION}}, then the selection is always taken from the first vertex in the primitive. If the value returned is equivalent to {{enum|GL_LAST_VERTEX_CONVENTION}}, then the selection is always taken from the last vertex in the primitive. If the value returned is equivalent to {{enum|GL_UNDEFINED_VERTEX}}, then the selection is not guaranteed to be taken from any specific vertex in the primitive.

; {{defenum|GL_PROVOKING_VERTEX}} (enumeration, initially {{enum|GL_LAST_VERTEX_CONVENTION}}, see {{apifunc|glProvokingVertex}})
: The provoking vertex mode.

=== Rasterization ===

See {{glref44|table 23.9|530}}.

; {{defenum|GL_ALIASED_LINE_WIDTH_RANGE}} (float[2], defaults to (1, 1), see {{apifunc|glLineWidth}})
: The range of widths supported for aliased lines.

; {{defenum|GL_CULL_FACE}} (boolean, initially ''FALSE'')
: Whether polygon culling is enabled. See {{apifunc|glCullFace}} and {{enumapifunc|glIsEnabled|GL_CULL_FACE}}.

; {{defenum|GL_CULL_FACE_MODE}} (enumeration, initially {{enum|GL_BACK}})
: What face to cull when culling is enabled.  See {{apifunc|glCullFace}}.

; {{defenum|GL_FRONT_FACE}} (enumeration, initially {{enum|GL_CCW}}
: Whether clockwise or anticlockwise are considered front facing polygons. See {{apifunc|glFrontFace}}.

; {{defenum|GL_LINE_SMOOTH}} (boolean, initially ''FALSE'')
: Whether to antialias lines. See {{enumapifunc|glIsEnabled|GL_LINE_SMOOTH}}.

; {{defenum|GL_LINE_WIDTH}} (float, initially 1.0)
: The line width as specified with {{apifunc|glLineWidth}}.

; {{defenum|GL_POINT_FADE_THRESHOLD_SIZE}} (float, initially 1.0)
: The point size threshold for alpha attenuation, as specified with {{enumapifunc|glPointParameter|GL_POINT_FADE_THRESHOLD_SIZE}}.

; {{defenum|GL_POINT_SIZE}} (float, initially 1.0, see {{apifunc|glPointSize}})
: The point size.

; {{defenum|GL_POINT_SIZE_GRANULARITY}} (float, see {{apifunc|glPointSize}})
: The size difference between adjacent supported sizes for antialiased points.

; {{defenum|GL_POINT_SIZE_RANGE}} (float[2], defaults to (1, 1), see {{apifunc|glPointSize}})
: The smallest and largest supported sizes for antialiased points.

; {{defenum|GL_POINT_SPRITE_COORD_ORIGIN}} (enumeration, initially {{enum|GL_UPPER_LEFT}})
: The origin orientation for point sprites, as specified with {{enumapifunc|glPointParameter|GL_POINT_SPRITE_COORD_ORIGIN}}.

; {{defenum|GL_POLYGON_MODE}} (enumeration[2], initially {{enum|GL_FILL}})
: The polygon rasterization mode for front and back faces.

; {{defenum|GL_POLYGON_OFFSET_FACTOR}}
: {{param|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 {{apifunc|glPolygonOffset}}.

; {{defenum|GL_POLYGON_OFFSET_FILL}} (boolean, initially {{enum|GL_FALSE}})
: Whether polygon offset is enabled for polygons in fill mode. See {{apifunc|glPolygonOffset}}.

; {{defenum|GL_POLYGON_OFFSET_LINE}} (boolean, initially {{enum|GL_FALSE}})
: Whether polygon offset is enabled for polygons in line mode. See {{apifunc|glPolygonOffset}}.

; {{defenum|GL_POLYGON_OFFSET_POINT}} (boolean, initially {{enum|GL_FALSE}})
: Whether polygon offset is enabled for polygons in point mode. See {{apifunc|glPolygonOffset}}.

; {{defenum|GL_POLYGON_OFFSET_UNITS}}
: {{param|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 {{apifunc|glPolygonOffset}}.

; {{defenum|GL_POLYGON_SMOOTH}} (boolean, initially {{enum|GL_FALSE}})
: Whether antialiasing of polygons is enabled. See {{apifunc|glPolygonMode}} and {{apifunc|glIsEnabled}}.

; {{defenum|GL_PROGRAM_POINT_SIZE}} (boolean, initially {{enum|GL_FALSE}}, see {{apifunc|glPointSize}})
: Whether vertex program point size mode is enabled. If enabled, then the point size is taken from the shader built-in {{code|gl_PointSize}}. If disabled, then the point size is taken from the point state as specified by {{apifunc|glPointSize}}.

; {{defenum|GL_RASTERIZER_DISCARD}} (boolean, initially {{enum|GL_FALSE}})
: Whether to discard primitives before rasterization. See {{apifunc|glIsEnabled}}.

; {{defenum|GL_SMOOTH_LINE_WIDTH_RANGE}} (float[2], defaults to (1, 1), see {{apifunc|glLineWidth}})
: The range of widths supported for smooth (antialiased) lines.

; {{defenum|GL_SMOOTH_LINE_WIDTH_GRANULARITY}} (float, see {{apifunc|glLineWidth}})
: The level of quantization applied to smooth line width parameters.

; {{defenum|GL_SUBPIXEL_BITS}} (integer, at least 4)
: An estimate of the number of bits of subpixel resolution that are used to position rasterized geometry in window coordinates.

=== Shader Execution ===

This section contains limits that are relevant to shader execution.

; {{enum|GL_FRAGMENT_INTERPOLATION_OFFSET_BITS}} (integer, at least 4)
: The subpixel bits for ''interpolateAtOffset''.

; {{enum|GL_MAX_FRAGMENT_INTERPOLATION_OFFSET}} (float, at least 0.5)
: The furthest positive offset for ''interplateAtOffset''.

; {{enum|GL_MIN_FRAGMENT_INTERPOLATION_OFFSET}} (float, at most -0.5)
: The furthest negative offset for ''interpolateAtOffset''.

=== Shaders ===

This section contains limits that are present in all shader stages and parameters that are the sums of all shader stages. Subsections contain parameters that are specific to individual shader stages. See {{glref44|tables 23.57-62|578}}.

; {{enum|GL_MAX_<i>stage</i>_ATOMIC_COUNTER_BUFFERS}} and {{defenum|GL_MAX_COMBINED_ATOMIC_COUNTER_BUFFERS}}
: {{defenum|GL_MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS}}, {{defenum|GL_MAX_FRAGMENT_ATOMIC_COUNTER_BUFFERS}}, {{defenum|GL_MAX_GEOMETRY_ATOMIC_COUNTER_BUFFERS}}, {{defenum|GL_MAX_TESS_CONTROL_ATOMIC_COUNTER_BUFFERS_ATOMIC_COUNTER_BUFFERS}}, {{defenum|GL_MAX_TESS_EVALUATION_ATOMIC_COUNTER_BUFFERS}}, {{defenum|GL_MAX_VERTEX_ATOMIC_COUNTER_BUFFERS}}
: {The maximum number of atomic counter buffers that may be accessed by a shader of each stage. The minimum value is 0 for all shader stages except for fragment shaders, which is 1. If an atomic counter buffer is used by multiple shader stages, each such use counts separately against the combined limit. The minimum combined limit is 1. See {{glref44|section 7.7|133}}.

; {{enum|GL_MAX_<i>stage</i>_ATOMIC_COUNTERS}} and {{defenum|GL_MAX_COMBINED_ATOMIC_COUNTERS}}
: {{defenum|GL_MAX_COMPUTE_ATOMIC_COUNTERS}}, {{defenum|GL_MAX_FRAGMENT_ATOMIC_COUNTERS}}, {{defenum|GL_MAX_GEOMETRY_ATOMIC_COUNTERS}}, {{defenum|GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS}}, {{defenum|GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS}}, {{defenum|GL_MAX_VERTEX_ATOMIC_COUNTERS}}
: The maximum number of atomic counters available to shaders of each stage. The minimum value is 0 for all stages except for fragment shaders, which is 8. If more than one pipeline stage accesses the same atomic counter, each such access counts separately towards the combined total. The minimum combined total is 8. See {{glref44|section 11.1.3.6|354}}.

; {{enum|GL_MAX_COMBINED_<i>stage</i>_UNIFORM_COMPONENTS}}
: {{defenum|GL_MAX_COMBINED_COMPUTE_UNIFORM_COMPONENTS}}, {{defenum|GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS}}, {{defenum|GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS}}, {{defenum|GL_MAX_COMBINED_TESS_CONTROL_UNIFORM_COMPONENTS}}, {{defenum|GL_MAX_COMBINED_TESS_EVALUATION_UNIFORM_COMPONENTS}}, {{defenum|GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS}}
: The maximum number of words for compute shader uniform variables in all uniform blocks (including default). The value must be at least ({{enum|GL_MAX_<i>stage</i>_UNIFORM_BLOCK}} × {{enum|GL_MAX_<i>stage</i>_UNIFORM_BLOCK_SIZE}} ÷ 4 + {{enum|GL_MAX_<i>stage</i>_UNIFORM_COMPONENTS}}. See {{apifunc|glUniform}}, {{glref44|table 7.5|118}}, and {{glref44|table 23.66|587}}.

; {{enum|GL_MAX_<i>stage</i>_IMAGE_UNIFORMS}} and {{defenum|GL_MAX_COMBINED_IMAGE_UNIFORMS}}
: {{defenum|GL_MAX_COMPUTE_IMAGE_UNIFORMS}}, {{defenum|GL_MAX_FRAGMENT_IMAGE_UNIFORMS}}, {{defenum|GL_MAX_GEOMETRY_IMAGE_UNIFORMS}}, {{defenum|GL_MAX_TESS_CONTROL_IMAGE_UNIFORMS}}, {{defenum|GL_MAX_TESS_EVALUATION_IMAGE_UNIFORMS}}, {{defenum|GL_MAX_VERTEX_IMAGE_UNIFORMS}}
: The maximum number of image uniforms available to the individual shader stage. If more than one shader stage accesses the same uniform, each such access counts separately. There is no minimum value except for the compute and fragment shader stages where it must be at least 8. The combined limit must be at least 8. See {{glref44|section 11.1.3.7|355}}.

; {{enum|GL_MAX_<i>stage</i>_SHADER_STORAGE_BLOCKS}} and {{defenum|GL_MAX_COMBINED_SHADER_STORAGE_BLOCKS}}
: {{defenum|GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS}}, {{defenum|GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS}}, {{defenum|GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS}}, {{defenum|GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS}}, {{defenum|GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS}}, {{defenum|GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS}}
: The maximum number of active shader storage blocks that may be accessed by a shader. There is no minimum limit except in fragment shaders where the minimum is 8. The combined limit must also be at least 8. See {{glref44|section 7.8|135}}.

; {{enum|GL_MAX_<i>stage</i>_UNIFORM_COMPONENTS}}
: {{defenum|GL_MAX_COMPUTE_UNIFORM_COMPONENTS}}, {{defenum|GL_MAX_FRAGMENT_UNIFORM_COMPONENTS}}, {{defenum|GL_MAX_GEOMETRY_UNIFORM_COMPONENTS}}, {{defenum|GL_MAX_TESS_CONTROL_UNIFORM_COMPONENTS}}, {{defenum|GL_MAX_TESS_EVALUATION_UNIFORM_COMPONENTS}}, {{defenum|GL_MAX_VERTEX_UNIFORM_COMPONENTS}}
: The maximum number of individual floating-point, integer, or boolean values that can be held in uniform variable storage for a shader. The value must be at least 512 for compute and geometry shaders, and 1024 for all other shader stages. See {{apifunc|glUniform}}.

; {{enum|GL_MAX_<i>stage</i>_TEXTURE_IMAGE_UNITS}}, {{defenum|GL_MAX_TEXTURE_IMAGE_UNITS}} (fragment), {{defenum|GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS}}
: {{defenum|GL_MAX_COMPUTE_TEXTURE_IMAGE_UNITS}}, {{defenum|GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS}}, {{defenum|GL_MAX_TESS_CONTROL_TEXTURE_IMAGE_UNITS}}, {{defenum|GL_MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS}}, {{defenum|GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS}}
: The maximum supported texture image units that can be used to access texture maps from the shader. The value may be at least 16. The combined limit must be at least 96. See {{apifunc|glActiveTexture}}.

; {{enum|GL_MAX_<i>stage</i>_COMPUTE_UNIFORM_BLOCKS}} and {{defenum|GL_MAX_COMBINED_UNIFORM_BLOCKS}}
: {{defenum|GL_MAX_COMPUTE_UNIFORM_BLOCKS}}, {{defenum|GL_MAX_FRAGMENT_UNIFORM_BLOCKS}}, {{defenum|GL_MAX_GEOMETRY_UNIFORM_BLOCKS}}, {{defenum|GL_MAX_TESS_CONTROL_UNIFORM_BLOCKS}}, {{defenum|GL_MAX_TESS_EVALUATION_UNIFORM_BLOCKS}}, {{defenum|GL_MAX_VERTEX_UNIFORM_BLOCKS}}
: The maximum number of uniform blocks per shader. The value must be at least 14, and the combined limit must be at least 70. See {{apifunc|glUniformBlockBinding}}.

==== Compute Shaders ====

See {{glref44|table 23.62|583}}.

; {{defenum|GL_DISPATCH_INDIRECT_BUFFER_BINDING}} (GLint, initially 0, see {{apifunc|glBindBuffer}})
: The name of the buffer object currently bound to the target {{enum|GL_DISPATCH_INDIRECT_BUFFER}}, or 0 if none is bound.

; {{defenum|GL_MAX_COMPUTE_SHARED_MEMORY_SIZE}} (GLint, minimum is 32768)
: The maximum total storage size in bytes of all variables declared as <i>shared</i> in all compute shaders linked into a single program object.

; {{defenum|GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS}} (GLint, minimum is 1024)
: 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, which must be at least 1024.

; {{defenum|GL_MAX_COMPUTE_WORK_GROUP_COUNT}} (indexed[3] GLint, minimum is [65535, 65535, 65535])
: The maximum number of work groups that may be dispatched to a compute shader. Accepted by the indexed versions of '''glGet'''. Indices 0, 1, and 2 correspond to the X, Y and Z dimensions, respectively. The minimum is 65535 in each dimension.

; {{defenum|GL_MAX_COMPUTE_WORK_GROUP_SIZE}} (indexed[3] GLint, minimum is [1024, 1024, 64])
: The maximum size of a work groups that may be used during compilation of a compute shader. Accepted by the indexed versions of '''glGet'''. Indices 0, 1, and 2 correspond to the X, Y and Z dimensions, respectively.

==== Fragment Shaders ====

See {{glref44|table 23.61|582}}.

; {{defenum|GL_MAX_FRAGMENT_INPUT_COMPONENTS}} (GLint, at least 128)
: The maximum number of components of the inputs read by the fragment shader.

; {{defenum|GL_MAX_FRAGMENT_UNIFORM_VECTORS}} (GLint, at least 256)
: 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 {{enum|GL_MAX_FRAGMENT_UNIFORM_COMPONENTS}} divided by 4. See {{apifunc|glUniform}}.

; {{defenum|GL_MAX_PROGRAM_TEXTURE_GATHER_OFFSET}} (GLint, at least 7)
: The maximum texel offset for '''textureGather'''. See {{glref44|section 8.14.1|226}}.

; {{defenum|GL_MIN_PROGRAM_TEXTURE_GATHER_OFFSET}} (GLint, at most -8)
: The minimum texel offset for '''textureGather'''. See {{glref44|section 8.14.1|226}}.

==== Geometry Shaders ====

See {{glref44|table 23.60|581}}.

; {{defenum|GL_MAX_GEOMETRY_INPUT_COMPONENTS}} (GLint, at least 64)
: The maximum number of components of inputs read by a geometry shader.

; {{defenum|GL_MAX_GEOMETRY_OUTPUT_COMPONENTS}} (GLint, at least 128)
: The maximum number of components of outputs written by a geometry shader.

; {{defenum|GL_MAX_GEOMETRY_OUTPUT_VERTICES}} (GLint, at least 256)
: The maximum number of components of outputs written by a geometry shader.

; {{defenum|GL_MAX_GEOMETRY_SHADER_INVOCATIONS}} (GLint, at least 32)
: The maximum supported geometry shader invocation count.

; {{defenum|GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS}} (GLint, at least 1024)
: The maximum number of all components all vertices written by a geometry shader.

; {{defenum|GL_MAX_VERTEX_STREAMS}} (GLint, at least 4, see {{glref44|section 11.3.4.3|384}})
: The total number of vertex streams geometry shaders may output to.

==== Tessellation Control Shaders ====

See {{glref44|table 23.2|523}} and {{glref44|table 23.58|579}}.

; {{defenum|GL_MAX_PATCH_VERTICES}} (GLint, at least 32, see {{apifunc|glPatchParameter}} and {{glref44|section 10.1.15|306}})
: The maximum number of vertices in a patch primitive.

; {{defenum|GL_MAX_TESS_CONTROL_INPUT_COMPONENTS}} (GLint, at least 128, see {{glref44|section 11.2.1.2.2|363}})
: The number of components for tessellation control shader per-vertex inputs.

; {{defenum|GL_MAX_TESS_CONTROL_OUTPUT_COMPONENTS}} (GLint, at least 128, see {{glref44|section 11.2.1.2.3|365}})
: The number of components for tessellation control shader per-vertex outputs.

; {{defenum|GL_MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS}} (GLint, at least 4096, see {{glref44|section 11.2.1.2.3|365}})
: The number of components for tessellation control shader per-patch outputs.

; {{defenum|GL_MAX_TESS_GEN_LEVEL}} (GLint, at least 64, see {{glref44|section 11.2.2|368}})
: The maximum level supported by the tessellation primitive generator.
 
; {{defenum|GL_MAX_TESS_PATCH_COMPONENTS}} (GLint, at least 120, see {{glref44|section 11.2.1.2.3|365}})
: The number of components for tessellation control shader per-patch outputs.

; {{defenum|GL_PATCH_DEFAULT_INNER_LEVEL}} (GLfloat[2], initially (1.0, 1.0))
: The default inner tessellation level without a control shader.

; {{defenum|GL_PATCH_DEFAULT_OUTER_LEVEL}} (GLfloat[4], initially (1.0, 1.0, 1.0, 1.0))
: The default outer tessellation level without a control shader.

; {{defenum|GL_PATCH_VERTICES}} (GLint, initially 3)
: The number of vertices in the input patch.

==== Tessellation Evaluation Shaders ====

See {{glref44|table 23.59|580}}.

; {{defenum|GL_MAX_TESS_EVALUATION_INPUT_COMPONENTS}} (GLint, at least 128, see {{glref44|section 11.2.3.3|379}})
: The number of components for tesselation evaluation shader per-vertex inputs.

; {{defenum|GL_MAX_TESS_EVALUATION_OUTPUT_COMPONENTS}} (GLint, at least 128, see {{glref44|section 11.2.3.4|380}})
: The number of components for tesselation evaluation shader per-vertex outputs.

==== Vertex Shaders ====

See {{glref44|table 23.57|578}}.

; {{defenum|GL_MAX_VERTEX_ATTRIBS}} (GLint, at least 16, see {{apifunc|glVertexAttrib}})
: The maximum number of 4-component generic vertex attributes accessible to a vertex shader.

; {{defenum|GL_MAX_VERTEX_OUTPUT_COMPONENTS}} (GLint, at least 64)
: The maximum number of components of output written by a vertex shader.

; {{defenum|GL_MAX_VERTEX_UNIFORM_VECTORS}} (GLint, at least 256)
: The maximum number of 4-vectors that may be held in uniform variable storage for the vertex shader. The value of {{enum|GL_MAX_VERTEX_UNIFORM_VECTORS}} is equal to the value of {{enum|GL_MAX_VERTEX_UNIFORM_COMPONENTS}} divided by 4.

=== Textures ===

; {{defenum|GL_ACTIVE_TEXTURE}} (GLenum, default {{enum|GL_TEXTURE0}}, see {{apifunc|glActiveTexture}})
: The active multitexture unit.

; {{defenum|GL_COMPRESSED_TEXTURE_FORMATS}} (GLenum[], see {{apifunc|glCompressedTexImage2D}}
: A list of symbolic constants of length [[#GL_NUM_COMPRESSED_TEXTURE_FORMATS|{{enum|GL_NUM_COMPRESSED_TEXTURE_FORMATS}}]] indicating which compressed texture formats are available and suited for general-purpose usage. Formats with restrictions that need to be specifically understood prior to use will not be returned by this query. This query has been deprecated in OpenGL 4.2, because the vaguess of the term "general-purpose" makes it possible for implementations to choose to return no formats from the query.

; {{defenum|GL_MAX_3D_TEXTURE_SIZE}} (GLint, at least 2048, see {{apifunc|glTexImage3D}})
: The largest 3D texture dimension that the GL can handle. Use {{enum|GL_PROXY_TEXTURE_3D}} to determine if a texture is too large.

; {{defenum|GL_MAX_ARRAY_TEXTURE_LAYERS}} (GLint, at least 2048, see {{apifunc|glTexImage2D}})
: The maximum number of layers allowed in an array texture.

; {{defenum|GL_MAX_CUBE_MAP_TEXTURE_SIZE}} (GLint, at least 16384, see {{apifunc|glTexImage2D}})
: The largest cube-map texture dimension that the GL can handle. Use {{enum|GL_PROXY_TEXTURE_CUBE_MAP}} to determine if a texture is too large.

; {{defenum|GL_MAX_RECTANGLE_TEXTURE_SIZE}} (GLint, minimum 16384, see {{apifunc|glTexImage2D}})
: The largest rectangular texture dimensions that the GL can handle. Use {{enum|GL_PROXY_RECTANGLE_TEXTURE}} to determine if a texture is too large. See {{apifunc|glTexImage2D}}.

; {{defenum|GL_MAX_RENDERBUFFER_SIZE}} (GLint, at least 16384, see {{apifunc|glFramebufferRenderbuffer}})
: The maximum supported width and height for renderbuffers.

; {{defenum|GL_MAX_TEXTURE_BUFFER_SIZE}} (GLint, at least 65536)
: The maximum number of texels allowed in the texel array of a texture buffer object.

; {{defenum|GL_MAX_TEXTURE_LOD_BIAS}} (GLfloat, at least 2.0)
: The maximum, absolute value of the texture level-of-detail bias.

; {{defenum|GL_MAX_TEXTURE_SIZE}} (GLint, at least 16384, see {{apifunc|glTexImage1D}} and {{apifunc|glTexImage2D}})
: The largest texture dimension that the GL can handle for 1D and 2D textures. Use a proxy texture target such as {{enum|GL_PROXY_TEXTURE_1D}} or {{enum|GL_PROXY_TEXTURE_2D}} to determine if a texture is too large.

; {{defenum|GL_NUM_COMPRESSED_TEXTURE_FORMATS}} (GLint, at least 18, see {{apifunc|glCompressedTexImage2D}})
: The number of available compressed texture formats that will be returned from [[#GL_COMPRESSED_TEXTURE_FORMATS|{{enum|GL_COMPRESSED_TEXTURE_FORMATS}}]].

; {{defenum|GL_SAMPLER_BINDING}} (GLint, default 0, see {{apifunc|glBindSampler}})
: The name of the sampler object currently bound to the active texture unit.

; {{enum|GL_TEXTURE_BINDING_''type''}} (GLint, default 0)
: {{defenum|GL_TEXTURE_BINDING_1D}}, {{defenum|GL_TEXTURE_BINDING_1D_ARRAY}}, {{defenum|GL_TEXTURE_BINDING_2D}}, {{defenum|GL_TEXTURE_BINDING_2D_ARRAY}}, {{defenum|GL_TEXTURE_BINDING_2D_MULTISAMPLE}}, {{defenum|GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY}}, {{defenum|GL_TEXTURE_BINDING_3D}}, {{defenum|GL_TEXTURE_BINDING_BUFFER}}, {{defenum|GL_TEXTURE_BINDING_CUBE_MAP}}, {{defenum|GL_TEXTURE_BINDING_RECTANGLE}}
: The name of the texture currently bound to the target. See {{apifunc|glBindTexture}}. The corresponding targets are {{enum|GL_TEXTURE_1D}}, {{enum|GL_TEXTURE_1D_ARRAY}}, {{enum|GL_TEXTURE_2D}}, {{enum|GL_TEXTURE_2D_ARRAY}}, {{enum|GL_TEXTURE_2D_MULTISAMPLE}}, {{enum|GL_TEXTURE_2D_MULTISAMPLE_ARRAY}}, {{enum|GL_TEXTURE_3D}}, {{enum|GL_TEXTURE_BUFFER}}, {{enum|GL_TEXTURE_CUBE_MAP}}, and {{enum|GL_TEXTURE_RECTANGLE}}.

; {{defenum|GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT}} (GLint, at least 1, see {{apifunc|glUniformBlockBinding}})
: The minimum required alignment for texture buffer sizes and offset.

; {{defenum|GL_TEXTURE_CUBE_MAP_SEAMLESS}} (GLboolean, initially {{enum|GL_FALSE}})
: Whether seamless cube map filtering is enabled.

=== Transformation State ===

See {{glref44|table 23.7|528}}.

; {{defenum|GL_CLIP_DISTANCE}}''i''
: {{param|params}} returns one boolean value, whether the ''i''th user clipping plane is enabled, which is initially ''FALSE''. See {{apifunc|glIsEnabled}}.

; {{defenum|GL_DEPTH_CLAMP}} (GLboolean, initially {{enum|GL_FALSE}}, see {{apifunc|glIsEnabled}})
: Whether depth clamping is enabled.

; {{defenum|GL_DEPTH_RANGE}} (GLfloat[2], initially (0.0, 1.0), see {{apifunc|glDepthRange}})
: 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.

; {{defenum|GL_MAX_CLIP_DISTANCES}} (GLint, at least 8)
: The maximum number of application-defined clipping planes.

; {{defenum|GL_MAX_VIEWPORT_DIMS}} (GLfloat[2], see {{apifunc|glViewport}})
: 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.

; {{defenum|GL_MAX_VIEWPORTS}} (GLint, at least 16, see {{apifunc|glViewportIndexed}})
: The maximum number of simultaneous viewports that are supported.

; {{defenum|GL_TRANSFORM_FEEDBACK_BINDING}} (GLint, initially 0)
: The name of the object bound for transform feedback operations.

; {{defenum|GL_VIEWPORT}}
: When used with non-indexed variants of '''glGet''' (such as '''glGetIntegerv'''), {{param|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 {{apifunc|glViewport}}. When used with indexed variants of '''glGet''' (such as '''glGetIntegeri_v'''), {{param|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 {{apifunc|glViewportIndexed}}.

; {{defenum|GL_VIEWPORT_BOUNDS_RANGE}} (GLfloat[2], at least (-32768, 32767))
: The minimum and maximum viewport bounds range.

; {{defenum|GL_VIEWPORT_SUBPIXEL_BITS}} (GLint, at least 0)
: The number of bits of sub-pixel precision which the GL uses to interpret the floating point viewport bounds.

=== Vertex Arrays ===

Also see {{apifunc|glGetVertexAttrib}}, {{apifunc|glGetVertexAttribPointer}}, and {{apifunc|glGetObjectLabel}}.

; {{defenum|GL_MAX_ELEMENT_INDEX}} (64-bit integer, always (2<sup>32</sup> - 1) (4,294,967,294))
: The maximum index that may be specified during the transfer of generic vertex attributes to the GL. This is maintained for compatibility with OpenGL ES.

; {{defenum|GL_MAX_ELEMENTS_INDICES}} (integer, see {{apifunc|glDrawRangeElements}})
: The recommended maximum number of vertex array indices.

; {{defenum|GL_MAX_ELEMENTS_VERTICES}} (integer, see {{apifunc|glDrawRangeElements}})
: The recommended maximum number of vertex array vertices.

; {{defenum|GL_PRIMITIVE_RESTART}} (boolean, initially {{enum|GL_FALSE}}, see {{apifunc|glIsEnabled}})
: Whether primitive restart is enabled.

; {{defenum|GL_PRIMITIVE_RESTART_FIXED_INDEX}} (boolean, initially {{enum|GL_FALSE}})
: Whether primitive restart fixed index is enabled.

; {{defenum|GL_PRIMITIVE_RESTART_FOR_PATCHES_SUPPORTED}} (boolean)
: Whether primitive restart support is available for a {{enum|GL_PATCHES}} primitive.

; {{defenum|GL_PRIMITIVE_RESTART_INDEX}} (integer, initially 0, see {{apifunc|glPrimitiveRestartIndex}})
: The current primitive restart index.

; {{defenum|GL_VERTEX_BINDING_DIVISOR}} (indexed[] GLint)
: The instance step divisor of the first element in the bound buffer's data store for vertex attribute bound to the {{param|index}}.

; {{defenum|GL_VERTEX_BINDING_OFFSET}} (indexed[] GLint64, initially 0)
: Accepted by the indexed forms. {{param|params}} returns a single 64-bit integer value representing the byte offset of the first element in the bound buffer's data store for vertex attribute bound to {{param|index}}.

; {{defenum|GL_VERTEX_BINDING_STRIDE}} (intexed[] GLint, initially 0)
: Accepted by the indexed forms. {{param|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 {{param|index}}.

== Notes ==

The following parameters return the associated value for the active texture unit: {{enum|GL_TEXTURE_1D}}, {{enum|GL_TEXTURE_BINDING_1D}}, {{enum|GL_TEXTURE_2D}}, {{enum|GL_TEXTURE_BINDING_2D}}, {{enum|GL_TEXTURE_3D}} and {{enum|GL_TEXTURE_BINDING_3D}}.

{{enum|GL_MAX_VIEWPORTS}}, {{enum|GL_VIEWPORT_SUBPIXEL_BITS}}, {{enum|GL_VIEWPORT_BOUNDS_RANGE}}, {{enum|GL_LAYER_PROVOKING_VERTEX}}, and {{enum|GL_VIEWPORT_INDEX_PROVOKING_VERTEX}} are available only if the GL version is 4.1 or greater.

{{enum|GL_MAX_VERTEX_ATOMIC_COUNTERS}}, {{enum|GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS}}, {{enum|GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS}}, {{enum|GL_MAX_GEOMETRY_ATOMIC_COUNTERS}}, {{enum|GL_MAX_FRAGMENT_ATOMIC_COUNTERS}}, and {{enum|GL_MIN_MAP_BUFFER_ALIGNMENT}} are accepted by {{param|pname}} only if the GL version is 4.2 or greater.

{{enum|GL_MAX_ELEMENT_INDEX}} is accepted by {{param|pname}} only if the GL version is 4.3 or greater.

{{enum|GL_MAX_COMPUTE_UNIFORM_BLOCKS}}, {{enum|GL_MAX_COMPUTE_TEXTURE_IMAGE_UNITS}}, {{enum|GL_MAX_COMPUTE_UNIFORM_COMPONENTS}}, {{enum|GL_MAX_COMPUTE_ATOMIC_COUNTERS}}, {{enum|GL_MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS}}, {{enum|GL_MAX_COMBINED_COMPUTE_UNIFORM_COMPONENTS}}, {{enum|GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS}}, {{enum|GL_MAX_COMPUTE_WORK_GROUP_COUNT}}, and {{enum|GL_MAX_COMPUTE_WORK_GROUP_SIZE}} and {{enum|GL_DISPATCH_INDIRECT_BUFFER_BINDING}} are available only if the GL version is 4.3 or greater.

{{enum|GL_MAX_DEBUG_GROUP_STACK_DEPTH}}, {{enum|GL_DEBUG_GROUP_STACK_DEPTH}} and {{enum|GL_MAX_LABEL_LENGTH}} are accepted only if the GL version is 4.3 or greater.

{{enum|GL_MAX_UNIFORM_LOCATIONS}} is accepted only if the GL version is 4.3 or greater.

{{enum|GL_MAX_FRAMEBUFFER_WIDTH}}, {{enum|GL_MAX_FRAMEBUFFER_HEIGHT}}, {{enum|GL_MAX_FRAMEBUFFER_LAYERS}}, and {{enum|GL_MAX_FRAMEBUFFER_SAMPLES}} are available only if the GL version is 4.3 or greater.

{{enum|GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS}}, {{enum|GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS}}, {{enum|GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS}}, {{enum|GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS}}, {{enum|GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS}}, and {{enum|GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS}} are available only if the GL version is 4.3 or higher.

{{enum|GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT}} is available only if the GL version is 4.3 or greater.

{{enum|GL_VERTEX_BINDING_DIVISOR}}, {{enum|GL_VERTEX_BINDING_OFFSET}}, {{enum|GL_VERTEX_BINDING_STRIDE}}, {{enum|GL_MAX_VERTEX_ATTRIB_RELATIVE_OFFSET}} and {{enum|GL_MAX_VERTEX_ATTRIB_BINDINGS}} are available only if the GL version is 4.3 or greater.

{{enum|GL_MAX_VARYING_COMPONENTS}} and {{enum|GL_MAX_VARYING_FLOATS}} are deprecated in GL version 4.4.

== Errors ==

{{enum|GL_INVALID_ENUM}} is generated if {{param|pname}} is not an accepted value.

{{enum|GL_INVALID_VALUE}} is generated on any of '''glGetBooleani_v''', '''glGetIntegeri_v''', '''glGetFloati_v''', '''glGetDoublei_v''', or '''glGetInteger64i_v''' if {{param|index}} is outside of the valid range for the indexed state {{param|target}}.

== See Also ==

{{apifunc|glGetActiveUniform}}, {{apifunc|glGetAttachedShaders}}, {{apifunc|glGetAttribLocation}}, {{apifunc|glGetBufferParameter}}, {{apifunc|glGetBufferPointerv}}, {{apifunc|glGetBufferSubData}}, {{apifunc|glGetCompressedTexImage}}, {{apifunc|glGetError}}, {{apifunc|glGetProgram}}, {{apifunc|glGetProgramInfoLog}}, {{apifunc|glGetQueryiv}}, {{apifunc|glGetQueryObject}}, {{apifunc|glGetShader}}, {{apifunc|glGetShaderInfoLog}}, {{apifunc|glGetShaderSource}}, {{apifunc|glGetString}}, {{apifunc|glGetTexImage}}, {{apifunc|glGetTexLevelParameter}}, {{apifunc|glGetTexParameter}}, {{apifunc|glGetUniform}}, {{apifunc|glGetUniformLocation}}, {{apifunc|glGetVertexAttrib}}, {{apifunc|glGetVertexAttribPointerv}}, {{apifunc|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/ http://oss.sgi.com/projects/FreeB/].

[[Category:Core API Reference|Get]]