qb64/internal/help/_glet.md

_glGet: return the value or values of a selected parameter

Syntax

SUB _glGetBooleanv (BYVAL pname AS _UNSIGNED LONG, params AS _UNSIGNED _BYTE) void _glGetBooleanv(GLenum pname, GLboolean * params);

SUB _glGetDoublev (BYVAL pname AS _UNSIGNED LONG, params AS DOUBLE) void _glGetDoublev(GLenum pname, GLdouble * params);

SUB _glGetFloatv (BYVAL pname AS _UNSIGNED LONG, params AS SINGLE) void _glGetFloatv(GLenum pname, GLfloat * params);

SUB _glGetIntegerv (BYVAL pname AS _UNSIGNED LONG, params AS LONG) void _glGetIntegerv(GLenum pname, GLint * params);

void _glGetInteger64v(GLenum pname, GLint64 * 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.

Syntax

void _glGetBooleani_v(GLenum pname, GLuint index, GLboolean * data); void _glGetIntegeri_v(GLenum pname, GLuint index, GLint * data); void _glGetFloati_v(GLenum pname, GLuint index, GLfloat * data); void _glGetDoublei_v(GLenum pname, GLuint index, GLdouble * data); void _glGetInteger64i_v(GLenum pname, GLuint index, GLint64 * data);

; 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 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 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 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 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 from_glMapBuffer 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 and window coordinates of the scissor box, followed by its width and height. Initially the and 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 _glShaderStorageBlockBinding. ; _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 texture buffer object currently bound. 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 and window coordinates of the viewport, followed by its width and height. Initially the and 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 and window coordinates of the indexed viewport, followed by its width and height. Initially the and 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 _glViewportIndexed. ; _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.

Error(s)

_GL_INVALID_ENUM is generated if pname is not an accepted value.

_GL_INVALID_VALUE is generated on any of _glGetBooleani_v, _glGetIntegeri_v, _glGetFloati_v, _glGetDoublei_v, or _glGetInteger64i_v if index is outside of the valid range for the indexed state target.

See Also

_GL _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 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/].