void GLAPIENTRY glGetBooleanv( GLenum pname,
GLboolean *params )
C SPECIFICATION
void GLAPIENTRY glGetDoublev( GLenum pname,
GLdouble *params )
C SPECIFICATION
void GLAPIENTRY glGetFloatv( GLenum pname,
GLfloat *params )
C SPECIFICATION
void GLAPIENTRY glGetIntegerv( GLenum pname,
GLint *params )
PARAMETERS
pname Specifies the parameter value to be returned. The symbolic con‐
stants 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 re‐
turned, 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 in‐
teger value. Floating-point colors and normals, however, are returned
with a linear mapping that maps 1.0 to the most positive representable
integer value, and -1.0 to the most negative representable integer
value. If glGetFloatv or glGetDoublev is called, boolean values are re‐
turned 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 accu‐
mulation buffer. Integer values, if requested,
are linearly mapped from the internal floating-
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 fac‐
tor used during pixel transfers. The initial
value is 1. See glPixelTransfer.
GL_ALPHA_TEST params returns a single boolean value indicat‐
ing whether alpha testing of fragments is en‐
abled. 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 initial value is 0.
See glAlphaFunc. An integer value, if re‐
quested, is linearly mapped from the internal
floating-point representation such that 1.0 re‐
turns the most positive representable integer
value, and -1.0 returns the most negative rep‐
resentable integer value.
GL_ATTRIB_STACK_DEPTH params returns one value, the depth of the at‐
tribute stack. If the stack is empty, 0 is re‐
turned. The initial value is 0. See
glPushAttrib.
GL_AUTO_NORMAL params returns a single boolean value indicat‐
ing 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 auxil‐
iary color buffers. The initial value is 0.
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 ini‐
tial 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 indicat‐
ing 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 indicat‐
ing whether the specified clipping plane is en‐
abled. The initial value is GL_FALSE. See
glClipPlane.
GL_COLOR_ARRAY params returns a single boolean value indicat‐
ing 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 compo‐
nents per color in the color array. The initial
value is 4. See glColorPointer.
GL_COLOR_ARRAY_STRIDE params returns one value, the byte offset be‐
tween 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
GL_COLOR_MATERIAL params returns a single boolean value indicat‐
ing whether one or more material 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 track‐
ing 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 indicat‐
ing 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 indicat‐
ing whether 1D convolution is enabled. The ini‐
tial value is GL_FALSE. See
glConvolutionFilter1D.
GL_CONVOLUTION_2D params returns a single boolean value indicat‐
ing whether 2D convolution is enabled. The ini‐
tial value is GL_FALSE. See
glConvolutionFilter2D.
GL_CULL_FACE params returns a single boolean value indicat‐
ing 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
dex. 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 in‐
ternal floating-point representation such that
1.0 returns the most positive representable in‐
teger 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 negative 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 indicat‐
ing 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 coordinates. 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
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 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 fac‐
tor used during pixel transfers. The initial
value is 1. See glPixelTransfer.
GL_DEPTH_TEST params returns a single boolean value indicat‐
ing whether depth testing of fragments is en‐
abled. The initial value is GL_FALSE. See
glDepthFunc and glDepthRange.
GL_DEPTH_WRITEMASK params returns a single boolean value indicat‐
ing if the depth buffer is enabled for writing.
The initial value is GL_TRUE. See glDepthMask.
GL_DITHER params returns a single boolean value indicat‐
ing whether dithering of fragment colors and
indices is enabled. The initial value is
GL_TRUE.
GL_DOUBLEBUFFER params returns a single boolean value indicat‐
ing 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 indicat‐
ing 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 indicat‐
ing whether the edge flag array is enabled. The
initial value is GL_FALSE. See
GL_FOG params returns a single boolean value indicat‐
ing 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 repre‐
sentation such that 1.0 returns the most posi‐
tive representable integer value, and -1.0 re‐
turns the most negative representable integer
value. The initial value is (0, 0, 0, 0). See
glFog.
GL_FOG_DENSITY params returns one value, the fog density pa‐
rameter. 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 ini‐
tial 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 counterclock‐
wise polygon winding is treated as front-fac‐
ing. 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 fac‐
tor used during pixel transfers. The initial
value is 1. See glPixelTransfer.
GL_INDEX_ARRAY_TYPE params returns one value, the data type of in‐
dexes in the color index array. The initial
value is GL_FLOAT. See glIndexPointer.
GL_INDEX_BITS params returns one value, the number of bit‐
planes 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 indicat‐
ing whether a fragment's index values are
merged into the framebuffer using a logical op‐
eration. The initial value is GL_FALSE. See
glLogicOp.
GL_INDEX_MODE params returns a single boolean value indicat‐
ing 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 during pixel trans‐
fers. 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 indicat‐
ing whether the specified light is enabled. The
initial value is GL_FALSE. See glLight and
glLightModel.
GL_LIGHTING params returns a single boolean value indicat‐
ing 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 in‐
tensity of the entire scene. Integer values,
if requested, are linearly mapped from the in‐
ternal floating-point representation such that
1.0 returns the most positive representable in‐
The initial value is GL_FALSE. See
glLightModel.
GL_LIGHT_MODEL_TWO_SIDE params returns a single boolean value indicat‐
ing whether separate materials are used to com‐
pute lighting for front- and back-facing poly‐
gons. The initial value is GL_FALSE. See
glLightModel.
GL_LINE_SMOOTH params returns a single boolean value indicat‐
ing 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 indicat‐
ing 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 stip‐
ple pattern. The initial value is all 1's. See
glLineStipple.
GL_LINE_STIPPLE_REPEAT params returns one value, the line stipple re‐
peat 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 an‐
tialiased 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 presented to
glCallLists. The initial value is 0. See
glListBase.
GL_LIST_INDEX params returns one value, the name of the dis‐
play list currently under construction. 0 is
returned if no display list is currently under
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 parti‐
tions in the 1D map's grid domain. The initial
value is 1. See glMapGrid.
GL_MAP1_INDEX params returns a single boolean value indicat‐
ing whether 1D evaluation generates color in‐
dices. The initial value is GL_FALSE. See
glMap1.
GL_MAP1_NORMAL params returns a single boolean value indicat‐
ing whether 1D evaluation generates normals.
The initial value is GL_FALSE. See glMap1.
GL_MAP1_TEXTURE_COORD_1 params returns a single boolean value indicat‐
ing whether 1D evaluation generates 1D texture
coordinates. The initial value is GL_FALSE.
See glMap1.
GL_MAP1_TEXTURE_COORD_2 params returns a single boolean value indicat‐
ing whether 1D evaluation generates 2D texture
coordinates. The initial value is GL_FALSE.
See glMap1.
GL_MAP1_TEXTURE_COORD_3 params returns a single boolean value indicat‐
ing whether 1D evaluation generates 3D texture
coordinates. The initial value is GL_FALSE.
See glMap1.
GL_MAP1_TEXTURE_COORD_4 params returns a single boolean value indicat‐
ing whether 1D evaluation generates 4D texture
coordinates. The initial value is GL_FALSE.
See glMap1.
GL_MAP1_VERTEX_3 params returns a single boolean value indicat‐
ing whether 1D evaluation generates 3D vertex
coordinates. The initial value is GL_FALSE.
See glMap1.
GL_MAP1_VERTEX_4 params returns a single boolean value indicat‐
ing whether 1D evaluation generates 4D vertex
coordinates. The initial value is GL_FALSE.
See glMap1.
GL_MAP2_COLOR_4 params returns a single boolean value indicat‐
ing whether 2D evaluation generates colors. The
initial value is GL_FALSE. See glMap2.
GL_MAP2_NORMAL params returns a single boolean value indicat‐
ing whether 2D evaluation generates normals.
The initial value is GL_FALSE. See glMap2.
GL_MAP2_TEXTURE_COORD_1 params returns a single boolean value indicat‐
ing whether 2D evaluation generates 1D texture
coordinates. The initial value is GL_FALSE.
See glMap2.
GL_MAP2_TEXTURE_COORD_2 params returns a single boolean value indicat‐
ing whether 2D evaluation generates 2D texture
coordinates. The initial value is GL_FALSE.
See glMap2.
GL_MAP2_TEXTURE_COORD_3 params returns a single boolean value indicat‐
ing whether 2D evaluation generates 3D texture
coordinates. The initial value is GL_FALSE.
See glMap2.
GL_MAP2_TEXTURE_COORD_4 params returns a single boolean value indicat‐
ing whether 2D evaluation generates 4D texture
coordinates. The initial value is GL_FALSE.
See glMap2.
GL_MAP2_VERTEX_3 params returns a single boolean value indicat‐
ing whether 2D evaluation generates 3D vertex
coordinates. The initial value is GL_FALSE.
See glMap2.
GL_MAP2_VERTEX_4 params returns a single boolean value indicat‐
ing whether 2D evaluation generates 4D vertex
coordinates. The initial value is GL_FALSE.
See glMap2.
GL_MAP_COLOR params returns a single boolean value indicat‐
ing if colors and color indices are to be re‐
placed by table lookup during pixel transfers.
The initial value is GL_FALSE. See
glPixelTransfer.
GL_MAP_STENCIL params returns a single boolean value indicat‐
ing if stencil indices are to be replaced by
table lookup during pixel transfers. The ini‐
tial 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.
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 maxi‐
mum number of vertex array indices. See
glDrawRangeElements.
GL_MAX_ELEMENTS_VERTICES params returns one value, the recommended maxi‐
mum 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 display-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
ported width and height of the viewport. These
must be at least as large as the visible dimen‐
sions of the display being rendered to. See
glViewport.
GL_MINMAX params returns a single boolean value indicat‐
ing 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 modelview matrix
stack. Initially this matrix is the identity
matrix. See glPushMatrix.
GL_MODELVIEW_STACK_DEPTH params returns one value, the number of matri‐
ces 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, indicat‐
ing 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 be‐
tween 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 indicat‐
ing whether normals are automatically 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 ini‐
tial 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 indicat‐
ing whether single-bit pixels being written to
memory are written first to the least signifi‐
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 indicat‐
ing 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_PERSPECTIVE_CORRECTION_HINT
params returns one value, a symbolic constant
indicating the mode of the perspective correc‐
tion 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 al‐
pha-to-alpha pixel translation table. The ini‐
tial 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 table. 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 in‐
dex-to-alpha pixel translation table. The ini‐
tial value is 1. See glPixelMap.
GL_PIXEL_MAP_I_TO_B_SIZE params returns one value, the size of the in‐
dex-to-blue pixel translation table. The ini‐
tial value is 1. See glPixelMap.
GL_PIXEL_MAP_I_TO_G_SIZE params returns one value, the size of the in‐
dex-to-green pixel translation table. The ini‐
tial value is 1. See glPixelMap.
GL_PIXEL_MAP_I_TO_I_SIZE params returns one value, the size of the in‐
dex-to-index pixel translation table. The ini‐
tial value is 1. See glPixelMap.
GL_PIXEL_MAP_I_TO_R_SIZE params returns one value, the size of the in‐
dex-to-red pixel translation table. The ini‐
tial value is 1. See glPixelMap.
between adjacent supported sizes for an‐
tialiased 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 indicat‐
ing 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-facing 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 gen‐
erated when a polygon is rasterized. The ini‐
tial value is 0. See glPolygonOffset.
GL_POLYGON_OFFSET_UNITS params returns one value. This value is multi‐
plied 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 indicat‐
ing whether polygon offset is enabled for poly‐
gons in fill mode. The initial value is
GL_FALSE. See glPolygonOffset.
GL_POLYGON_OFFSET_LINE params returns a single boolean value indicat‐
ing whether polygon offset is enabled for poly‐
gons in line mode. The initial value is
GL_FALSE. See glPolygonOffset.
GL_POLYGON_OFFSET_POINT params returns a single boolean value indicat‐
ing whether polygon offset is enabled for poly‐
gons in point mode. The initial value is
GL_FALSE. See glPolygonOffset.
GL_POST_COLOR_MATRIX_COLOR_TABLE
params returns a single boolean value indicat‐
ing 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 fac‐
tor applied to RGBA fragments after color ma‐
trix 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 fac‐
tor applied to RGBA fragments after color ma‐
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 fac‐
tor applied to RGBA fragments after convolu‐
tion. 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 fac‐
tor applied to RGBA fragments after convolu‐
tion. The initial value is 1. See
glPixelTransfer.
GL_PROJECTION_MATRIX params returns sixteen values: the projection
matrix on the top of the projection matrix
stack. Initially this matrix is the identity
matrix. See glPushMatrix.
GL_PROJECTION_STACK_DEPTH
params returns one value, the number of matri‐
ces on the projection matrix stack. The ini‐
tial 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.
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 indicat‐
ing 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
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 indicat‐
ing whether scissoring is enabled. The initial
value is GL_FALSE. See glScissor.
GL_SELECTION_BUFFER_SIZE params return one value, the size of the selec‐
tion buffer. See glSelectBuffer.
GL_SEPARABLE_2D params returns a single boolean value indicat‐
ing whether 2D separable convolution is en‐
abled. 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.
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 sten‐
cil 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 sten‐
cil 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 contents of the sten‐
cil buffer. The initial value is 0. See
glStencilFunc.
GL_STENCIL_TEST params returns a single boolean value indicat‐
ing whether stencil testing of fragments is en‐
abled. 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 com‐
pared. The initial value is all 1's. See
glStencilFunc.
GL_STENCIL_WRITEMASK params returns one value, the mask that con‐
trols writing of the stencil bitplanes. The
initial value is all 1's. See glStencilMask.
GL_STEREO params returns a single boolean value indicat‐
ing 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 initial value
is 4.
GL_TEXTURE_1D params returns a single boolean value indicat‐
ing 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
ing 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 indicat‐
ing whether the texture coordinate array is en‐
abled. The initial value is GL_FALSE. See
glTexCoordPointer.
GL_TEXTURE_COORD_ARRAY_SIZE
params returns one value, the number of coordi‐
nates per element in the texture coordinate ar‐
ray. The initial value is 4. See
glTexCoordPointer.
GL_TEXTURE_COORD_ARRAY_STRIDE
params returns one value, the byte offset be‐
tween consecutive elements in the texture coor‐
dinate 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 indicat‐
ing whether automatic generation of the q tex‐
ture coordinate is enabled. The initial value
is GL_FALSE. See glTexGen.
GL_TEXTURE_GEN_R params returns a single boolean value indicat‐
ing whether automatic generation of the r tex‐
ture coordinate is enabled. The initial value
is GL_FALSE. See glTexGen.
GL_TEXTURE_GEN_S params returns a single boolean value indicat‐
ing whether automatic generation of the S tex‐
ture coordinate is enabled. The initial value
is GL_FALSE. See glTexGen.
GL_TEXTURE_GEN_T params returns a single boolean value indicat‐
ing whether automatic generation of the T tex‐
ture coordinate is enabled. The initial value
is GL_FALSE. See glTexGen.
GL_TEXTURE_MATRIX params returns sixteen values: the texture ma‐
tial is 0. See glPixelStore.
GL_UNPACK_LSB_FIRST params returns a single boolean value indicat‐
ing whether single-bit pixels being read from
memory are read first from the least signifi‐
cant 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 indicat‐
ing 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_ARRAY params returns a single boolean value indicat‐
ing 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 coordi‐
nates per vertex in the vertex array. The ini‐
tial value is 4. See glVertexPointer.
GL_VERTEX_ARRAY_STRIDE params returns one value, the byte offset be‐
tween consecutive vertexes 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
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_ALIASED_POINT_SIZE_GRANULARITY,
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 func‐
tionality 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 func‐
tionality 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_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 exe‐
cution of glBegin and the corresponding execution of glEnd.
SEE ALSO
glGetClipPlane, glGetColorTable, glGetColorTableParameter,
glGetConvolutionFilter, glGetConvolutionParameter, glGetError,
glGetHistogram, glGetHistogramParameter, glGetLight, glGetMap,
glGetMaterial, glGetMinmax, glGetMinmaxParameter, glGetPixelMap,
glGetPointerv, glGetPolygonStipple, glGetSeparableFilter, glGetString,
glGetTexEnv, glGetTexGen, glGetTexImage, glGetTexLevelParameter,
glGetTexParameter, glIsEnabled
GLGET(3G)
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