GLGET(3G) GLGET(3G)
NAME
glGetBooleanv, glGetDoublev, glGetFloatv, glGetIntegerv - return the value or values of a selected
parameter
C SPECIFICATION
void glGetBooleanv( GLenum pname,
GLboolean *params )
C SPECIFICATION
void glGetDoublev( GLenum pname,
GLdouble *params )
C SPECIFICATION
void glGetFloatv( GLenum pname,
GLfloat *params )
C SPECIFICATION
void glGetIntegerv( GLenum pname,
GLint *params )
PARAMETERS
pname Specifies the parameter value to be returned. The symbolic constants in the list below are
accepted.
params Returns the value or values of the specified parameter.
DESCRIPTION
These four commands return values for simple state variables in GL. pname is a symbolic constant
indicating the state variable to be returned, and params is a pointer to an array of the indicated
type in which to place the returned data.
Type conversion is performed if params has a different type than the state variable value being
requested. If glGetBooleanv is called, a floating-point (or integer) value is converted to GL_FALSE
if and only if it is 0.0 (or 0). Otherwise, it is converted to GL_TRUE. If glGetIntegerv is called,
boolean values are returned as GL_TRUE or GL_FALSE, and most floating-point values are rounded to the
nearest integer value. Floating-point colors and normals, however, are returned with a linear mapping
that maps 1.0 to the most positive representable integer value, and -1.0 to the most negative repre-sentable representable
sentable 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_ACCUM_ALPHA_BITS params returns one value, the number of alpha bitplanes in the accumulation
buffer.
GL_ACCUM_BLUE_BITS params returns one value, the number of blue bitplanes in the accumulation
buffer.
GL_ACCUM_CLEAR_VALUE params returns four values: the red, green, blue, and alpha values used to
clear the accumulation buffer. Integer values, if requested, are linearly
mapped from the internal floating-point representation such that 1.0 returns
the most positive representable integer value, and -1.0 returns the most
negative representable integer value. The initial value is (0, 0, 0, 0).
See glClearAccum.
GL_ACCUM_GREEN_BITS params returns one value, the number of green bitplanes in the accumulation
buffer.
GL_ACCUM_RED_BITS params returns one value, the number of red bitplanes in the accumulation
buffer.
GL_ACTIVE_TEXTURE_ARB params returns a single value indicating the active multitexture unit. The
initial value is GL_TEXTURE0_ARB. See glActiveTextureARB.
GL_ALIASED_POINT_SIZE_RANGE
params returns two values, the smallest and largest supported sizes for
aliased points.
GL_ALIASED_LINE_WIDTH_RANGE
params returns two values, the smallest and largest supported widths for
aliased lines.
GL_ALPHA_BIAS params returns one value, the alpha bias factor used during pixel transfers.
The initial value is 0. See glPixelTransfer.
GL_ALPHA_BITS params returns one value, the number of alpha bitplanes in each color
buffer.
GL_ALPHA_SCALE params returns one value, the alpha scale factor used during pixel trans-fers. transfers.
fers. The initial value is 1. See glPixelTransfer.
GL_ALPHA_TEST params returns a single boolean value indicating whether alpha testing of
fragments is enabled. The initial value is GL_FALSE. See glAlphaFunc.
GL_ALPHA_TEST_FUNC params returns one value, the symbolic name of the alpha test function. The
initial value is GL_ALWAYS. See glAlphaFunc.
GL_ALPHA_TEST_REF params returns one value, the reference value for the alpha test. The ini-tial initial
tial value is 0. See glAlphaFunc. An integer value, if requested, is lin-early linearly
early 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.
GL_ATTRIB_STACK_DEPTH params returns one value, the depth of the attribute stack. If the stack is
empty, 0 is returned. The initial value is 0. See glPushAttrib.
GL_AUTO_NORMAL params returns a single boolean value indicating whether 2D map evaluation
automatically generates surface normals. The initial value is GL_FALSE. See
glMap2.
GL_AUX_BUFFERS params returns one value, the number of auxiliary color buffers. The initial
value is 0.
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 params returns one value, the symbolic constant identifying the destination
blend function. The initial value is GL_ZERO. See glBlendFunc.
GL_BLEND_EQUATION params returns one value, a symbolic constant indicating whether the blend
equation is GL_FUNC_ADD, GL_MIN or GL_MAX. See glBlendEquation.
GL_BLEND_SRC params returns one value, the symbolic constant identifying the source blend
function. The initial value is GL_ONE. See glBlendFunc.
GL_BLUE_BIAS params returns one value, the blue bias factor used during pixel transfers.
The initial value is 0. See glPixelTransfer.
GL_BLUE_BITS params returns one value, the number of blue bitplanes in each color buffer.
GL_BLUE_SCALE params returns one value, the blue scale factor used during pixel transfers.
The initial value is 1. See glPixelTransfer.
GL_CLIENT_ACTIVE_TEXTURE_ARB
params returns a single integer value indicating the current client active
multitexture unit. The initial value is GL_TEXTURE0_ARB. See
glClientActiveTextureARB.
GL_CLIENT_ATTRIB_STACK_DEPTH
params returns one value indicating the depth of the attribute stack. The
initial value is 0. See glPushClientAttrib.
GL_CLIP_PLANEi params returns a single boolean value indicating whether the specified clip-ping clipping
ping plane is enabled. The initial value is GL_FALSE. See glClipPlane.
GL_COLOR_ARRAY params returns a single boolean value indicating whether the color array is
enabled. The initial value is GL_FALSE. See glColorPointer.
GL_COLOR_ARRAY_SIZE params returns one value, the number of components per color in the color
array. The initial value is 4. See glColorPointer.
GL_COLOR_ARRAY_STRIDE params returns one value, the byte offset between consecutive colors in the
color array. The initial value is 0. See glColorPointer.
GL_COLOR_ARRAY_TYPE params returns one value, the data type of each component in the color
array. The initial value is GL_FLOAT. See glColorPointer.
GL_COLOR_CLEAR_VALUE params returns four values: the red, green, blue, and alpha values used to
clear the color buffers. Integer values, if requested, are linearly mapped
from the internal floating-point representation such that 1.0 returns the
most positive representable integer value, and -1.0 returns the most nega-tive negative
tive 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_MATERIAL params returns a single boolean value indicating whether one or more mate-rial material
rial parameters are tracking the current color. The initial value is
GL_FALSE. See glColorMaterial.
GL_COLOR_MATERIAL_FACE params returns one value, a symbolic constant indicating which materials
have a parameter that is tracking the current color. The initial value is
GL_FRONT_AND_BACK. See glColorMaterial.
GL_COLOR_MATERIAL_PARAMETER
params returns one value, a symbolic constant indicating which material
parameters are tracking the current color. The initial value is
GL_AMBIENT_AND_DIFFUSE. See glColorMaterial.
GL_COLOR_MATRIX params returns sixteen values: the color matrix on the top of the color
matrix stack. Initially this matrix is the identity matrix. See
glPushMatrix.
GL_COLOR_MATRIX_STACK_DEPTH
params returns one value, the maximum supported depth of the projection
matrix stack. The value must be at least 2. See glPushMatrix.
GL_COLOR_TABLE params returns a single boolean value indicating whether the color table
lookup is enabled. See glColorTable.
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_CONVOLUTION_1D params returns a single boolean value indicating whether 1D convolution is
enabled. The initial value is GL_FALSE. See glConvolutionFilter1D.
GL_CONVOLUTION_2D params returns a single boolean value indicating whether 2D convolution is
enabled. The initial value is GL_FALSE. See glConvolutionFilter2D.
GL_CULL_FACE params returns a single boolean value indicating whether polygon culling is
enabled. The initial value is GL_FALSE. See glCullFace.
GL_CULL_FACE_MODE params returns one value, a symbolic constant indicating which polygon faces
are to be culled. The initial value is GL_BACK. See glCullFace.
GL_CURRENT_COLOR params returns four values: the red, green, blue, and alpha values of the
current color. Integer values, if requested, are linearly mapped from the
internal floating-point representation such that 1.0 returns the most posi-tive positive
tive representable integer value, and -1.0 returns the most negative repre-sentable representable
sentable integer value. See glColor. The initial value is (1, 1, 1, 1).
GL_CURRENT_INDEX params returns one value, the current color index. The initial value is 1.
See glIndex.
GL_CURRENT_NORMAL params returns three values: the x, y, and z values of the current normal.
Integer values, if requested, are linearly mapped from the internal float-ing-point floating-point
ing-point representation such that 1.0 returns the most positive repre-sentable representable
sentable integer value, and -1.0 returns the most negative representable
integer value. The initial value is (0, 0, 1). See glNormal.
GL_CURRENT_RASTER_COLOR params returns four values: the red, green, blue, and alpha values of the
current raster position. 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 nega-tive negative
tive representable integer value. The initial value is (1, 1, 1, 1). See
glRasterPos.
GL_CURRENT_RASTER_DISTANCE
params returns one value, the distance from the eye to the current raster
position. The initial value is 0. See glRasterPos.
GL_CURRENT_RASTER_INDEX params returns one value, the color index of the current raster position.
The initial value is 1. See glRasterPos.
GL_CURRENT_RASTER_POSITION
params returns four values: the x, y, z, and w components of the current
raster position. x, y, and z are in window coordinates, and w is in clip
coordinates. The initial value is (0, 0, 0, 1). See glRasterPos.
GL_CURRENT_RASTER_POSITION_VALID
params returns a single boolean value indicating whether the current raster
position is valid. The initial value is GL_TRUE. See glRasterPos.
GL_CURRENT_RASTER_TEXTURE_COORDS
params returns four values: the s, t, r, and q current raster texture coor-dinates. coordinates.
dinates. The initial value is (0, 0, 0, 1). See glRasterPos and glTexCoord.
GL_CURRENT_TEXTURE_COORDS
params returns four values: the s, t, r, and q current texture coordinates.
The initial value is (0, 0, 0, 1). See glTexCoord.
GL_DEPTH_BIAS params returns one value, the depth bias factor used during pixel transfers.
The initial value is 0. See glPixelTransfer.
GL_DEPTH_BITS params returns one value, the number of bitplanes in the depth buffer.
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 float-ing-point floating-point
ing-point representation such that 1.0 returns the most positive repre-sentable representable
sentable integer value, and -1.0 returns the most negative representable
integer value. The initial value is 1. See glClearDepth.
GL_DEPTH_FUNC params returns one value, the symbolic constant that indicates the depth
comparison function. The initial value is GL_LESS. See glDepthFunc.
GL_DEPTH_RANGE params returns two values: the near and far mapping limits for the depth
buffer. Integer values, if requested, are linearly mapped from the internal
floating-point representation such that 1.0 returns the most positive repre-sentable representable
sentable integer value, and -1.0 returns the most negative representable
integer value. The initial value is (0, 1). See glDepthRange.
GL_DEPTH_SCALE params returns one value, the depth scale factor used during pixel trans-fers. transfers.
fers. The initial value is 1. See glPixelTransfer.
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 frag-ment fragment
ment 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_EDGE_FLAG params returns a single boolean value indicating whether the current edge
flag is GL_TRUE or GL_FALSE. The initial value is GL_TRUE. See glEdgeFlag.
GL_EDGE_FLAG_ARRAY params returns a single boolean value indicating whether the edge flag array
is enabled. The initial value is GL_FALSE. See glEdgeFlagPointer.
GL_EDGE_FLAG_ARRAY_STRIDE
params returns one value, the byte offset between consecutive edge flags in
the edge flag array. The initial value is 0. See glEdgeFlagPointer.
GL_FEEDBACK_BUFFER_SIZE params returns one value, the size of the feedback buffer. See
glFeedbackBuffer.
GL_FEEDBACK_BUFFER_TYPE params returns one value, the type of the feedback buffer. See
glFeedbackBuffer.
GL_FOG params returns a single boolean value indicating whether fogging is enabled.
The initial value is GL_FALSE. See glFog.
GL_FOG_COLOR params returns four values: the red, green, blue, and alpha components of
the fog color. Integer values, if requested, are linearly mapped from the
internal floating-point representation such that 1.0 returns the most posi-tive positive
tive representable integer value, and -1.0 returns the most negative repre-sentable representable
sentable integer value. The initial value is (0, 0, 0, 0). See glFog.
GL_FOG_DENSITY params returns one value, the fog density parameter. The initial value is 1.
See glFog.
GL_FOG_END params returns one value, the end factor for the linear fog equation. The
initial value is 1. See glFog.
GL_FOG_HINT params returns one value, a symbolic constant indicating the mode of the fog
hint. The initial value is GL_DONT_CARE. See glHint.
GL_FOG_INDEX params returns one value, the fog color index. The initial value is 0. See
glFog.
GL_FOG_MODE params returns one value, a symbolic constant indicating which fog equation
is selected. The initial value is GL_EXP. See glFog.
GL_FOG_START params returns one value, the start factor for the linear fog equation. The
initial value is 0. See glFog.
GL_FRONT_FACE params returns one value, a symbolic constant indicating whether clockwise
or counterclockwise polygon winding is treated as front-facing. The initial
value is GL_CCW. See glFrontFace.
GL_GREEN_BIAS params returns one value, the green bias factor used during pixel transfers.
The initial value is 0.
GL_GREEN_BITS params returns one value, the number of green bitplanes in each color
buffer.
GL_GREEN_SCALE params returns one value, the green scale factor used during pixel trans-fers. transfers.
fers. The initial value is 1. See glPixelTransfer.
GL_HISTOGRAM params returns a single boolean value indicating whether histogram is
enabled. The initial value is GL_FALSE. See glHistogram.
GL_INDEX_ARRAY params returns a single boolean value indicating whether the color index
array is enabled. The initial value is GL_FALSE. See glIndexPointer.
GL_INDEX_ARRAY_STRIDE params returns one value, the byte offset between consecutive color indexes
in the color index array. The initial value is 0. See glIndexPointer.
GL_INDEX_ARRAY_TYPE params returns one value, the data type of indexes in the color index array.
The initial value is GL_FLOAT. See glIndexPointer.
GL_INDEX_BITS params returns one value, the number of bitplanes in each color index
buffer.
GL_INDEX_CLEAR_VALUE params returns one value, the color index used to clear the color index
buffers. The initial value is 0. See glClearIndex.
GL_INDEX_LOGIC_OP params returns a single boolean value indicating whether a fragment's index
values are merged into the framebuffer using a logical operation. The ini-tial initial
tial value is GL_FALSE. See glLogicOp.
GL_INDEX_MODE params returns a single boolean value indicating whether the GL is in color
index mode (GL_TRUE) or RGBA mode (GL_FALSE).
GL_INDEX_OFFSET params returns one value, the offset added to color and stencil indices dur-ing during
ing pixel transfers. The initial value is 0. See glPixelTransfer.
GL_INDEX_SHIFT params returns one value, the amount that color and stencil indices are
shifted during pixel transfers. The initial value is 0. See
glPixelTransfer.
GL_INDEX_WRITEMASK params returns one value, a mask indicating which bitplanes of each color
index buffer can be written. The initial value is all 1's. See glIndexMask.
GL_LIGHTi params returns a single boolean value indicating whether the specified light
is enabled. The initial value is GL_FALSE. See glLight and glLightModel.
GL_LIGHTING params returns a single boolean value indicating whether lighting is
enabled. The initial value is GL_FALSE. See glLightModel.
GL_LIGHT_MODEL_AMBIENT params returns four values: the red, green, blue, and alpha components of
the ambient intensity of the entire scene. Integer values, if requested,
are linearly mapped from the internal floating-point representation such
that 1.0 returns the most positive representable integer value, and -1.0
returns the most negative representable integer value. The initial value is
(0.2, 0.2, 0.2, 1.0). See glLightModel.
GL_LIGHT_MODEL_COLOR_CONTROL
params returns single enumerated value indicating whether specular reflec-tion reflection
tion calculations are separated from normal lighting computations. The ini-tial initial
tial value is GL_SINGLE_COLOR.
GL_LIGHT_MODEL_LOCAL_VIEWER
params returns a single boolean value indicating whether specular reflection
calculations treat the viewer as being local to the scene. The initial value
is GL_FALSE. See glLightModel.
GL_LIGHT_MODEL_TWO_SIDE params returns a single boolean value indicating whether separate materials
are used to compute lighting for front- and back-facing polygons. The ini-tial initial
tial value is GL_FALSE. See glLightModel.
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_STIPPLE params returns a single boolean value indicating whether stippling of lines
is enabled. The initial value is GL_FALSE. See glLineStipple.
GL_LINE_STIPPLE_PATTERN params returns one value, the 16-bit line stipple pattern. The initial value
is all 1's. See glLineStipple.
GL_LINE_STIPPLE_REPEAT params returns one value, the line stipple repeat factor. The initial value
is 1. See glLineStipple.
GL_LINE_WIDTH params returns one value, the line width as specified with glLineWidth. The
initial value is 1.
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_LIST_BASE params returns one value, the base offset added to all names in arrays pre-sented presented
sented to glCallLists. The initial value is 0. See glListBase.
GL_LIST_INDEX params returns one value, the name of the display list currently under con-struction. construction.
struction. 0 is returned if no display list is currently under construc-tion. construction.
tion. The initial value is 0. See glNewList.
GL_LIST_MODE params returns one value, a symbolic constant indicating the construction
mode of the display list currently under construction. The initial value is
0. See glNewList.
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_MAP1_COLOR_4 params returns a single boolean value indicating whether 1D evaluation gen-erates generates
erates colors. The initial value is GL_FALSE. See glMap1.
GL_MAP1_GRID_DOMAIN params returns two values: the endpoints of the 1D map's grid domain. The
initial value is (0, 1). See glMapGrid.
GL_MAP1_GRID_SEGMENTS params returns one value, the number of partitions in the 1D map's grid
domain. The initial value is 1. See glMapGrid.
GL_MAP1_INDEX params returns a single boolean value indicating whether 1D evaluation gen-erates generates
erates color indices. The initial value is GL_FALSE. See glMap1.
GL_MAP1_NORMAL params returns a single boolean value indicating whether 1D evaluation gen-erates generates
erates normals. The initial value is GL_FALSE. See glMap1.
GL_MAP1_TEXTURE_COORD_1 params returns a single boolean value indicating whether 1D evaluation gen-erates generates
erates 1D texture coordinates. The initial value is GL_FALSE. See glMap1.
GL_MAP1_TEXTURE_COORD_2 params returns a single boolean value indicating whether 1D evaluation gen-erates generates
erates 2D texture coordinates. The initial value is GL_FALSE. See glMap1.
GL_MAP1_TEXTURE_COORD_3 params returns a single boolean value indicating whether 1D evaluation gen-erates generates
erates 3D texture coordinates. The initial value is GL_FALSE. See glMap1.
GL_MAP1_TEXTURE_COORD_4 params returns a single boolean value indicating whether 1D evaluation gen-erates generates
erates 4D texture coordinates. The initial value is GL_FALSE. See glMap1.
GL_MAP1_VERTEX_3 params returns a single boolean value indicating whether 1D evaluation gen-erates generates
erates 3D vertex coordinates. The initial value is GL_FALSE. See glMap1.
GL_MAP1_VERTEX_4 params returns a single boolean value indicating whether 1D evaluation gen-erates generates
erates 4D vertex coordinates. The initial value is GL_FALSE. See glMap1.
GL_MAP2_COLOR_4 params returns a single boolean value indicating whether 2D evaluation gen-erates generates
erates colors. The initial value is GL_FALSE. See glMap2.
GL_MAP2_GRID_DOMAIN params returns four values: the endpoints of the 2D map's i and j grid
domains. The initial value is (0,1; 0,1). See glMapGrid.
GL_MAP2_GRID_SEGMENTS params returns two values: the number of partitions in the 2D map's i and j
grid domains. The initial value is (1,1). See glMapGrid.
GL_MAP2_INDEX params returns a single boolean value indicating whether 2D evaluation gen-erates generates
erates color indices. The initial value is GL_FALSE. See glMap2.
GL_MAP2_NORMAL params returns a single boolean value indicating whether 2D evaluation gen-erates generates
erates normals. The initial value is GL_FALSE. See glMap2.
GL_MAP2_TEXTURE_COORD_1 params returns a single boolean value indicating whether 2D evaluation gen-erates generates
erates 1D texture coordinates. The initial value is GL_FALSE. See glMap2.
GL_MAP2_TEXTURE_COORD_2 params returns a single boolean value indicating whether 2D evaluation gen-erates generates
erates 2D texture coordinates. The initial value is GL_FALSE. See glMap2.
GL_MAP2_TEXTURE_COORD_3 params returns a single boolean value indicating whether 2D evaluation gen-erates generates
erates 3D texture coordinates. The initial value is GL_FALSE. See glMap2.
GL_MAP2_TEXTURE_COORD_4 params returns a single boolean value indicating whether 2D evaluation gen-erates generates
erates 4D texture coordinates. The initial value is GL_FALSE. See glMap2.
GL_MAP2_VERTEX_3 params returns a single boolean value indicating whether 2D evaluation gen-erates generates
erates 3D vertex coordinates. The initial value is GL_FALSE. See glMap2.
GL_MAP2_VERTEX_4 params returns a single boolean value indicating whether 2D evaluation gen-erates generates
erates 4D vertex coordinates. The initial value is GL_FALSE. See glMap2.
GL_MAP_COLOR params returns a single boolean value indicating if colors and color indices
are to be replaced by table lookup during pixel transfers. The initial value
is GL_FALSE. See glPixelTransfer.
GL_MAP_STENCIL params returns a single boolean value indicating if stencil indices are to
be replaced by table lookup during pixel transfers. The initial value is
GL_FALSE. See glPixelTransfer.
GL_MATRIX_MODE params returns one value, a symbolic constant indicating which matrix stack
is currently the target of all matrix operations. The initial value is
GL_MODELVIEW. See glMatrixMode.
GL_MAX_3D_TEXTURE_SIZE params returns one value, a rough estimate of the largest 3D texture that
the GL can handle. If the GL version is 1.2 or greater, use
GL_PROXY_TEXTURE_3D to determine if a texture is too large. See
glTexImage3D.
GL_MAX_CLIENT_ATTRIB_STACK_DEPTH
params returns one value indicating the maximum supported depth of the
client attribute stack. See glPushClientAttrib.
GL_MAX_ATTRIB_STACK_DEPTH
params returns one value, the maximum supported depth of the attribute
stack. The value must be at least 16. See glPushAttrib.
GL_MAX_CLIP_PLANES params returns one value, the maximum number of application-defined clipping
planes. The value must be at least 6. See glClipPlane.
GL_MAX_COLOR_MATRIX_STACK_DEPTH
params returns one value, the maximum supported depth of the color matrix
stack. The value must be at least 2. See glPushMatrix.
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_EVAL_ORDER params returns one value, the maximum equation order supported by 1D and 2D
evaluators. The value must be at least 8. See glMap1 and glMap2.
GL_MAX_LIGHTS params returns one value, the maximum number of lights. The value must be at
least 8. See glLight.
GL_MAX_LIST_NESTING params returns one value, the maximum recursion depth allowed during dis-play-list display-list
play-list traversal. The value must be at least 64. See glCallList.
GL_MAX_MODELVIEW_STACK_DEPTH
params returns one value, the maximum supported depth of the modelview
matrix stack. The value must be at least 32. See glPushMatrix.
GL_MAX_NAME_STACK_DEPTH params returns one value, the maximum supported depth of the selection name
stack. The value must be at least 64. See glPushName.
GL_MAX_PIXEL_MAP_TABLE params returns one value, the maximum supported size of a glPixelMap lookup
table. The value must be at least 32. See glPixelMap.
GL_MAX_PROJECTION_STACK_DEPTH
params returns one value, the maximum supported depth of the projection
matrix stack. The value must be at least 2. See glPushMatrix.
GL_MAX_TEXTURE_SIZE params returns one value. The value gives a rough estimate of the largest
texture that the GL can handle. If the GL version is 1.1 or greater, use
GL_PROXY_TEXTURE_1D or GL_PROXY_TEXTURE_2D to determine if a texture is too
large. See glTexImage1D and glTexImage2D.
GL_MAX_TEXTURE_STACK_DEPTH
params returns one value, the maximum supported depth of the texture matrix
stack. The value must be at least 2. See glPushMatrix.
GL_MAX_TEXTURE_UNITS_ARB params returns a single value indicating the number of texture units sup-ported. supported.
ported. The value must be at least 1. See glActiveTextureARB.
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_MINMAX params returns a single boolean value indicating whether pixel minmax values
are computed. The initial value is GL_FALSE. See glMinmax.
GL_MODELVIEW_MATRIX params returns sixteen values: the modelview matrix on the top of the mod-elview modelview
elview matrix stack. Initially this matrix is the identity matrix. See
glPushMatrix.
GL_MODELVIEW_STACK_DEPTH params returns one value, the number of matrices on the modelview matrix
stack. The initial value is 1. See glPushMatrix.
GL_NAME_STACK_DEPTH params returns one value, the number of names on the selection name stack.
The initial value is 0. See glPushName.
GL_NORMAL_ARRAY params returns a single boolean value, indicating whether the normal array
is enabled. The initial value is GL_FALSE. See glNormalPointer.
GL_NORMAL_ARRAY_STRIDE params returns one value, the byte offset between consecutive normals in the
normal array. The initial value is 0. See glNormalPointer.
GL_NORMAL_ARRAY_TYPE params returns one value, the data type of each coordinate in the normal
array. The initial value is GL_FLOAT. See glNormalPointer.
GL_NORMALIZE params returns a single boolean value indicating whether normals are auto-matically automatically
matically scaled to unit length after they have been transformed to eye
coordinates. The initial value is GL_FALSE. See glNormal.
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 mem-ory. memory.
ory. 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 twobyte
byte and four-byte pixel indices and components are swapped before being
written to memory. The initial value is GL_FALSE. See glPixelStore.
GL_PERSPECTIVE_CORRECTION_HINT
params returns one value, a symbolic constant indicating the mode of the
perspective correction hint. The initial value is GL_DONT_CARE. See glHint.
GL_PIXEL_MAP_A_TO_A_SIZE params returns one value, the size of the alpha-to-alpha pixel translation
table. The initial value is 1. See glPixelMap.
GL_PIXEL_MAP_B_TO_B_SIZE params returns one value, the size of the blue-to-blue pixel translation ta-ble. table.
ble. The initial value is 1. See glPixelMap.
GL_PIXEL_MAP_G_TO_G_SIZE params returns one value, the size of the green-to-green pixel translation
table. The initial value is 1. See glPixelMap.
GL_PIXEL_MAP_I_TO_A_SIZE params returns one value, the size of the index-to-alpha pixel translation
table. The initial value is 1. See glPixelMap.
GL_PIXEL_MAP_I_TO_B_SIZE params returns one value, the size of the index-to-blue pixel translation
table. The initial value is 1. See glPixelMap.
GL_PIXEL_MAP_I_TO_G_SIZE params returns one value, the size of the index-to-green pixel translation
table. The initial value is 1. See glPixelMap.
GL_PIXEL_MAP_I_TO_I_SIZE params returns one value, the size of the index-to-index pixel translation
table. The initial value is 1. See glPixelMap.
GL_PIXEL_MAP_I_TO_R_SIZE params returns one value, the size of the index-to-red pixel translation ta-ble. table.
ble. The initial value is 1. See glPixelMap.
GL_PIXEL_MAP_R_TO_R_SIZE params returns one value, the size of the red-to-red pixel translation ta-ble. table.
ble. The initial value is 1. See glPixelMap.
GL_PIXEL_MAP_S_TO_S_SIZE params returns one value, the size of the stencil-to-stencil pixel transla-tion translation
tion table. The initial value is 1. See glPixelMap.
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_POINT_SMOOTH params returns a single boolean value indicating whether antialiasing of
points is enabled. The initial value is GL_FALSE. See glPointSize.
GL_POINT_SMOOTH_HINT params returns one value, a symbolic constant indicating the mode of the
point antialiasing hint. The initial value is GL_DONT_CARE. See glHint.
GL_POLYGON_MODE params returns two values: symbolic constants indicating whether front-fac-ing front-facing
ing and back-facing polygons are rasterized as points, lines, or filled
polygons. The initial value is GL_FILL. See glPolygonMode.
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 implementationspecific
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_POLYGON_STIPPLE params returns a single boolean value indicating whether polygon stippling
is enabled. The initial value is GL_FALSE. See glPolygonStipple.
GL_POST_COLOR_MATRIX_COLOR_TABLE
params returns a single boolean value indicating whether post color matrix
transformation lookup is enabled. The initial value is GL_FALSE. See
glColorTable.
GL_POST_COLOR_MATRIX_RED_BIAS
params returns one value, the red bias factor applied to RGBA fragments
after color matrix transformations. The initial value is 0. See
glPixelTransfer.
GL_POST_COLOR_MATRIX_GREEN_BIAS
params returns one value, the green bias factor applied to RGBA fragments
after color matrix transformations. The initial value is 0. See
glPixelTransfer
GL_POST_COLOR_MATRIX_BLUE_BIAS
params returns one value, the blue bias factor applied to RGBA fragments
after color matrix transformations. The initial value is 0. See
glPixelTransfer.
GL_POST_COLOR_MATRIX_ALPHA_BIAS
params returns one value, the alpha bias factor applied to RGBA fragments
after color matrix transformations. The initial value is 0. See
glPixelTransfer.
GL_POST_COLOR_MATRIX_RED_SCALE
params returns one value, the red scale factor applied to RGBA fragments
after color matrix transformations. The initial value is 1. See
glPixelTransfer.
GL_POST_COLOR_MATRIX_GREEN_SCALE
params returns one value, the green scale factor applied to RGBA fragments
after color matrix transformations. The initial value is 1. See
glPixelTransfer.
GL_POST_COLOR_MATRIX_BLUE_SCALE
params returns one value, the blue scale factor applied to RGBA fragments
after color matrix transformations. The initial value is 1. See
glPixelTransfer.
GL_POST_COLOR_MATRIX_ALPHA_SCALE
params returns one value, the alpha scale factor applied to RGBA fragments
after color matrix transformations. The initial value is 1. See
glPixelTransfer.
GL_POST_CONVOLUTION_COLOR_TABLE
params returns a single boolean value indicating whether post convolution
lookup is enabled. The initial value is GL_FALSE. See glColorTable.
GL_POST_CONVOLUTION_RED_BIAS
params returns one value, the red bias factor applied to RGBA fragments
after convolution. The initial value is 0. See glPixelTransfer.
GL_POST_CONVOLUTION_GREEN_BIAS
params returns one value, the green bias factor applied to RGBA fragments
after convolution. The initial value is 0. See glPixelTransfer.
GL_POST_CONVOLUTION_BLUE_BIAS
params returns one value, the blue bias factor applied to RGBA fragments
after convolution. The initial value is 0. See glPixelTransfer.
GL_POST_CONVOLUTION_ALPHA_BIAS
params returns one value, the alpha bias factor applied to RGBA fragments
after convolution. The initial value is 0. See glPixelTransfer.
GL_POST_CONVOLUTION_RED_SCALE
params returns one value, the red scale factor applied to RGBA fragments
after convolution. The initial value is 1. See glPixelTransfer.
GL_POST_CONVOLUTION_GREEN_SCALE
params returns one value, the green scale factor applied to RGBA fragments
after convolution. The initial value is 1. See glPixelTransfer.
GL_POST_CONVOLUTION_BLUE_SCALE
params returns one value, the blue scale factor applied to RGBA fragments
after convolution. The initial value is 1. See glPixelTransfer.
GL_POST_CONVOLUTION_ALPHA_SCALE
params returns one value, the alpha scale factor applied to RGBA fragments
after convolution. The initial value is 1. See glPixelTransfer.
GL_PROJECTION_MATRIX params returns sixteen values: the projection matrix on the top of the pro-jection projection
jection matrix stack. Initially this matrix is the identity matrix. See
glPushMatrix.
GL_PROJECTION_STACK_DEPTH
params returns one value, the number of matrices on the projection matrix
stack. The initial value is 1. See glPushMatrix.
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 and glAccum.
GL_RED_BIAS params returns one value, the red bias factor used during pixel transfers.
The initial value is 0.
GL_RED_BITS params returns one value, the number of red bitplanes in each color buffer.
GL_RED_SCALE params returns one value, the red scale factor used during pixel transfers.
The initial value is 1. See glPixelTransfer.
GL_RENDER_MODE params returns one value, a symbolic constant indicating whether the GL is
in render, select, or feedback mode. The initial value is GL_RENDER. See
glRenderMode.
GL_RESCALE_NORMAL params returns single boolean value indicating whether normal rescaling is
enabled. See glEnable.
GL_RGBA_MODE params returns a single boolean value indicating whether the GL is in RGBA
mode (true) or color index mode (false). See glColor.
GL_SCISSOR_BOX params returns four values: the x and y window coordinates of the scissor
box, followed by its width and height. Initially the x and y window coordi-nates coordinates
nates 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_SELECTION_BUFFER_SIZE params return one value, the size of the selection buffer. See
glSelectBuffer.
GL_SEPARABLE_2D params returns a single boolean value indicating whether 2D separable convo-lution convolution
lution is enabled. The initial value is GL_FALSE. See glSeparableFilter2D.
GL_SHADE_MODEL params returns one value, a symbolic constant indicating whether the shading
mode is flat or smooth. The initial value is GL_SMOOTH. See glShadeModel.
GL_SMOOTH_LINE_WIDTH_RANGE
params returns two values, the smallest and largest supported widths for
antialiased lines. See glLineWidth.
GL_SMOOTH_LINE_WIDTH_GRANULARITY
params returns one value, the granularity of widths for antialiased lines.
See glLineWidth.
GL_SMOOTH_POINT_SIZE_RANGE
params returns two values, the smallest and largest supported widths for
antialiased points. See glPointSize.
GL_SMOOTH_POINT_SIZE_GRANULARITY
params returns one value, the granularity of sizes for antialiased points.
See glPointSize.
GL_STENCIL_BITS params returns one value, the number of bitplanes in the stencil buffer.
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.
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.
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.
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.
GL_STENCIL_REF params returns one value, the reference value that is compared with the con-tents contents
tents of the stencil buffer. The initial value is 0. See glStencilFunc.
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.
GL_STENCIL_WRITEMASK params returns one value, the mask that controls writing of the stencil bit-planes. bitplanes.
planes. The initial value is all 1's. See glStencilMask.
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 res-olution resolution
olution that are used to position rasterized geometry in window coordinates.
The initial value
is 4.
GL_TEXTURE_1D params returns a single boolean value indicating whether 1D texture mapping
is enabled. The initial value is GL_FALSE. See glTexImage1D.
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_2D params returns a single boolean value indicating whether 2D texture mapping
is enabled. The initial value is GL_FALSE. See glTexImage2D.
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_3D params returns a single boolean value indicating whether 3D texture mapping
is enabled. The initial value is GL_FALSE. See glTexImage3D.
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_COORD_ARRAY params returns a single boolean value indicating whether the texture coordi-nate coordinate
nate array is enabled. The initial value is GL_FALSE. See
glTexCoordPointer.
GL_TEXTURE_COORD_ARRAY_SIZE
params returns one value, the number of coordinates per element in the tex-ture texture
ture coordinate array. The initial value is 4. See glTexCoordPointer.
GL_TEXTURE_COORD_ARRAY_STRIDE
params returns one value, the byte offset between consecutive elements in
the texture coordinate array. The initial value is 0. See
glTexCoordPointer.
GL_TEXTURE_COORD_ARRAY_TYPE
params returns one value, the data type of the coordinates in the texture
coordinate array. The initial value is GL_FLOAT. See glTexCoordPointer.
GL_TEXTURE_GEN_Q params returns a single boolean value indicating whether automatic genera-tion generation
tion of the q texture coordinate is enabled. The initial value is GL_FALSE.
See glTexGen.
GL_TEXTURE_GEN_R params returns a single boolean value indicating whether automatic genera-tion generation
tion of the r texture coordinate is enabled. The initial value is GL_FALSE.
See glTexGen.
GL_TEXTURE_GEN_S params returns a single boolean value indicating whether automatic genera-tion generation
tion of the S texture coordinate is enabled. The initial value is GL_FALSE.
See glTexGen.
GL_TEXTURE_GEN_T params returns a single boolean value indicating whether automatic genera-tion generation
tion of the T texture coordinate is enabled. The initial value is GL_FALSE.
See glTexGen.
GL_TEXTURE_MATRIX params returns sixteen values: the texture matrix on the top of the texture
matrix stack. Initially this matrix is the identity matrix. See
glPushMatrix.
GL_TEXTURE_STACK_DEPTH params returns one value, the number of matrices on the texture matrix
stack. The initial value is 1. See glPushMatrix.
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 twobyte
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_ARRAY params returns a single boolean value indicating whether the vertex array is
enabled. The initial value is GL_FALSE. See glVertexPointer.
GL_VERTEX_ARRAY_SIZE params returns one value, the number of coordinates per vertex in the vertex
array. The initial value is 4. See glVertexPointer.
GL_VERTEX_ARRAY_STRIDE params returns one value, the byte offset between consecutive vertices in
the vertex array. The initial value is 0. See glVertexPointer.
GL_VERTEX_ARRAY_TYPE params returns one value, the data type of each coordinate in the vertex
array. The initial value is GL_FLOAT. See glVertexPointer.
GL_VIEWPORT params returns four values: the x and y window coordinates of the viewport,
followed by its width and height. Initially the x and y window coordinates
are both set to 0, and the width and height are set to the width and height
of the window into which the GL will do its rendering. See glViewport.
GL_ZOOM_X params returns one value, the x pixel zoom factor. The initial value is 1.
See glPixelZoom.
GL_ZOOM_Y params returns one value, the y pixel zoom factor. The initial value is 1.
See glPixelZoom.
Many of the boolean parameters can also be queried more easily using glIsEnabled.
NOTES
GL_COLOR_LOGIC_OP, GL_COLOR_ARRAY, GL_COLOR_ARRAY_SIZE, GL_COLOR_ARRAY_STRIDE, GL_COLOR_ARRAY_TYPE,
GL_EDGE_FLAG_ARRAY, GL_EDGE_FLAG_ARRAY_STRIDE, GL_INDEX_ARRAY, GL_INDEX_ARRAY_STRIDE,
GL_INDEX_ARRAY_TYPE, GL_INDEX_LOGIC_OP, GL_NORMAL_ARRAY, GL_NORMAL_ARRAY_STRIDE,
GL_NORMAL_ARRAY_TYPE, GL_POLYGON_OFFSET_UNITS, GL_POLYGON_OFFSET_FACTOR, GL_POLYGON_OFFSET_FILL,
GL_POLYGON_OFFSET_LINE, GL_POLYGON_OFFSET_POINT, GL_TEXTURE_COORD_ARRAY, GL_TEXTURE_COORD_ARRAY_SIZE,
GL_TEXTURE_COORD_ARRAY_STRIDE, GL_TEXTURE_COORD_ARRAY_TYPE, GL_VERTEX_ARRAY, GL_VERTEX_ARRAY_SIZE,
GL_VERTEX_ARRAY_STRIDE, and GL_VERTEX_ARRAY_TYPE are available only if the GL version is 1.1 or
greater.
GL_ALIASED_POINT_SIZE_RANGE, GL_FEEDBACK_BUFFER_SIZE, GL_FEEDBACK_BUFFER_TYPE,
GL_LIGHT_MODEL_AMBIENT, GL_LIGHT_MODEL_COLOR_CONTROL, GL_MAX_3D_TEXTURE_SIZE,
GL_MAX_ELEMENTS_INDICES, GL_MAX_ELEMENTS_VERTICES, GL_PACK_IMAGE_HEIGHT, GL_PACK_SKIP_IMAGES,
GL_RESCALE_NORMAL, GL_SELECTION_BUFFER_SIZE, GL_SMOOTH_LINE_WIDTH_GRANULARITY,
GL_SMOOTH_LINE_WIDTH_RANGE, GL_SMOOTH_POINT_SIZE_GRANULARITY, GL_SMOOTH_POINT_SIZE_RANGE,
GL_TEXTURE_3D, GL_TEXTURE_BINDING_3D, GL_UNPACK_IMAGE_HEIGHT, and GL_UNPACK_SKIP_IMAGES are available
only if the GL version is 1.2 or greater.
GL_LINE_WIDTH_GRANULARITY was deprecated in GL version 1.2. Its functionality was replaced by
GL_SMOOTH_LINE_WIDTH_GRANULARITY.
GL_LINE_WIDTH_RANGE was deprecated in GL version 1.2. Its functionality was replaced by
GL_SMOOTH_LINE_WIDTH_RANGE.
GL_POINT_SIZE_GRANULARITY was deprecated in GL version 1.2. Its functionality was replaced by
GL_SMOOTH_POINT_SIZE_GRANULARITY.
GL_POINT_SIZE_RANGE was deprecated in GL version 1.2. Its functionality was replaced by
GL_SMOOTH_POINT_SIZE_RANGE.
GL_BLEND_COLOR, GL_BLEND_EQUATION, GL_COLOR_MATRIX, GL_COLOR_MATRIX_STACK_DEPTH, GL_COLOR_TABLE,
GL_CONVOLUTION_1D, GL_CONVOLUTION_2D, GL_HISTOGRAM, GL_MAX_COLOR_MATRIX_STACK_DEPTH, GL_MINMAX,
GL_POST_COLOR_MATRIX_COLOR_TABLE, GL_POST_COLOR_MATRIX_RED_BIAS, GL_POST_COLOR_MATRIX_GREEN_BIAS,
GL_POST_COLOR_MATRIX_BLUE_BIAS, GL_POST_COLOR_MATRIX_ALPHA_BIAS, GL_POST_COLOR_MATRIX_RED_SCALE,
GL_POST_COLOR_MATRIX_GREEN_SCALE, GL_POST_COLOR_MATRIX_BLUE_SCALE, GL_POST_COLOR_MATRIX_ALPHA_SCALE,
GL_POST_CONVOLUTION_COLOR_TABLE, GL_POST_CONVOLUTION_RED_BIAS, GL_POST_CONVOLUTION_GREEN_BIAS,
GL_POST_CONVOLUTION_BLUE_BIAS, GL_POST_CONVOLUTION_ALPHA_BIAS, GL_POST_CONVOLUTION_RED_SCALE,
GL_POST_CONVOLUTION_GREEN_SCALE, GL_POST_CONVOLUTION_BLUE_SCALE, GL_POST_CONVOLUTION_ALPHA_SCALE, and
GL_SEPARABLE_2D are available only if GL_ARB_imaging is returned from glGet when called with the
argument GL_EXTENSIONS.
GL_ACTIVE_TEXTURE_ARB, GL_CLIENT_ACTIVE_TEXTURE_ARB, and GL_MAX_TEXTURE_UNITS_ARB are available only
if GL_ARB_multitexture is returned from glGet when called with the argument GL_EXTENSIONS.
When the GL_ARB_multitexture extension is supported, the following parameters return the associated
value for the active texture unit: GL_CURRENT_RASTER_TEXTURE_COORDS, GL_TEXTURE_1D,
GL_TEXTURE_BINDING_1D, GL_TEXTURE_2D, GL_TEXTURE_BINDING_2D, GL_TEXTURE_3D, GL_TEXTURE_BINDING_3D,
GL_TEXTURE_GEN_S, GL_TEXTURE_GEN_T, GL_TEXTURE_GEN_R, GL_TEXTURE_GEN_Q, GL_TEXTURE_MATRIX, and
GL_TEXTURE_STACK_DEPTH. Likewise, the following parameters return the associated value for the
active client texture unit: GL_TEXTURE_COORD_ARRAY, GL_TEXTURE_COORD_ARRAY_SIZE,
GL_TEXTURE_COORD_ARRAY_STRIDE, GL_TEXTURE_COORD_ARRAY_TYPE.
ERRORS
GL_INVALID_ENUM is generated if pname is not an accepted value.
GL_INVALID_OPERATION is generated if glGet is executed between the execution of glBegin and the cor-responding corresponding
responding execution of glEnd.
SEE ALSO
glGetClipPlane(3G), glGetColorTable(3G), glGetColorTableParameter(3G), glGetConvolutionFilter(3G),
glGetConvolutionParameter(3G), glGetError(3G), glGetHistogram(3G), glGetHistogramParameter(3G), glGetLight(3G), glGetMap(3G),
glGetMaterial(3G), glGetMinmax(3G), glGetMinmaxParameter(3G), glGetPixelMap(3G), glGetPointerv(3G), glGetPolygonStipple(3G),
glGetSeparableFilter(3G), glGetString(3G), glGetTexEnv(3G), glGetTexGen(3G), glGetTexImage(3G), glGetTexLevelParameter(3G),
glGetTexParameter(3G), glIsEnabled(3G)
GLGET(3G)
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