fglGet(3G)
fglGetBooleanv, fglGetDoublev, fglGetFloatv, fglGetIntegerv - return the value or values of a selected parameter
As shipped in IRIX 6.5.5. Unchanged since IRIX 6.5.
NAME fglGetBooleanv, fglGetDoublev, fglGetFloatv, fglGetIntegerv - return the value or values of a selected parameter FORTRAN SPECIFICATION SUBROUTINE fglGetBooleanv( INTEGER*4 pname, CHARACTER*8 params ) FORTRAN SPECIFICATION SUBROUTINE fglGetDoublev( INTEGER*4 pname, CHARACTER*8 params ) FORTRAN SPECIFICATION SUBROUTINE fglGetFloatv( INTEGER*4 pname, CHARACTER*8 params ) FORTRAN SPECIFICATION SUBROUTINE fglGetIntegerv( INTEGER*4 pname, CHARACTER*8 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 fglGetBooleanv 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 fglGetIntegerv is called, boolean values are returned as GL_TRUE or GL_FALSE, and most floating-point values are rounded to the nearest integer value. Floating-point colors and normals, however, are returned with a linear mapping that maps 1.0 to the most positive representable integer value, and -1.0 to the most negative representable integer value. If fglGetFloatv or fglGetDoublev 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 fglClearAccum. 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_ALPHA_BIAS params returns one value, the alpha bias factor used during pixel transfers. The initial value is 0. See fglPixelTransfer. 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 transfers. The initial value is 1. See fglPixelTransfer. GL_ALPHA_TEST params returns a single boolean value indicating whether alpha testing of fragments is enabled. The initial value is GL_FALSE. See fglAlphaFunc. GL_ALPHA_TEST_FUNC params returns one value, the symbolic name of the alpha test function. The initial value is GL_ALWAYS. See fglAlphaFunc. GL_ALPHA_TEST_REF params returns one value, the reference value for the alpha test. The initial value is 0. See fglAlphaFunc. An integer value, if requested, is 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. 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 fglPushAttrib. 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 fglMap2. 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 fglBlendFunc. GL_BLEND_COLOR_EXT params returns four values, the red, green, blue, and alpha values which are the components of the blend color. See fglBlendColorEXT. GL_BLEND_DST params returns one value, the symbolic constant identifying the destination blend function. The initial value is GL_ZERO. See fglBlendFunc. GL_BLEND_EQUATION_EXT params returns one value, a symbolic constant indicating whether the blend equation is GL_FUNC_ADD_EXT, GL_MIN_EXT or GL_MAX_EXT. See fglBlendEquationEXT. GL_BLEND_SRC params returns one value, the symbolic constant identifying the source blend function. The initial value is GL_ONE. See fglBlendFunc. GL_BLEND_OP_SGI params returns one value, the symbolic constant identifying the blend operator. See fglBlendFunc. GL_BLUE_BIAS params returns one value, the blue bias factor used during pixel transfers. The initial value is 0. See fglPixelTransfer. 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 fglPixelTransfer. GL_CALLIGRAPHIC_FRAGMENT_SGIX params returns a single boolean value indicating whether fragment information is sent to the calligraphic interface. GL_CLIENT_ATTRIB_STACK_DEPTH params returns one value indicating the depth of the attribute stack. The initial value is 0. See fglPushClientAttrib. GL_CLIP_PLANEi params returns a single boolean value indicating whether the specified clipping plane is enabled. The initial value is GL_FALSE. See fglClipPlane. GL_COLOR_ARRAY params returns a single boolean value indicating whether the color array is enabled. The initial value is GL_FALSE. See fglColorPointer. GL_COLOR_ARRAY_SIZE params returns one value, the number of components per color in the color array. The initial value is 4. See fglColorPointer. GL_COLOR_ARRAY_STRIDE params returns one value, the byte offset between consecutive colors in the color array. The initial value is 0. See fglColorPointer. 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 fglColorPointer. GL_COLOR_CLEAR_VALUE params returns four values: the red, green, blue, and alpha values used to clear the color buffers. Integer values, if requested, are linearly mapped from the internal floating-point representation such that 1.0 returns the most positive representable integer value, and -1.0 returns the most negative representable integer value. The initial value is (0, 0, 0, 0). See fglClearColor. 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 fglLogicOp. GL_COLOR_MATERIAL params returns a single boolean value indicating whether one or more material parameters are tracking the current color. The initial value is GL_FALSE. See fglColorMaterial. 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 fglColorMaterial. 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 fglColorMaterial. GL_COLOR_MATRIX_SGI params returns sixteen values: the color matrix on the top of the color matrix stack. See fglPushMatrix, fglPixelTransfer. GL_COLOR_MATRIX_STACK_DEPTH_SGI params returns one value, the maximum supported depth of the color matrix stack. See fglPushMatrix, fglPixelTransfer. GL_COLOR_TABLE_SGI params returns a single boolean value indicating whether colors are passed through a lookup table before being used by convolution. See fglColorTableSGI. 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 fglColorMask. GL_CONVOLUTION_1D_EXT params returns a single boolean value indicating whether one-dimensional convolution will be performed during pixel transfers. See fglConvolutionFilter1DEXT. GL_CONVOLUTION_2D_EXT params returns a single boolean value indicating whether two-dimensional convolution will be performed during pixel transfers. See fglConvolutionFilter2DEXT. GL_CULL_FACE params returns a single boolean value indicating whether polygon culling is enabled. The initial value is GL_FALSE. See fglCullFace. 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 fglCullFace. 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 positive representable integer value, and -1.0 returns the most negative representable integer value. See fglColor. 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 fglIndex. 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 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, 1). See fglNormal. 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 fglRasterPos. GL_CURRENT_RASTER_DISTANCE params returns one value, the distance from the eye to the current raster position. The initial value is 0. See fglRasterPos. GL_CURRENT_RASTER_INDEX params returns one value, the color index of the current raster position. The initial value is 1. See fglRasterPos. 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 fglRasterPos. 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 fglRasterPos. 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 fglRasterPos and fglTexCoord. 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 fglTexCoord. GL_DEPTH_BIAS params returns one value, the depth bias factor used during pixel transfers. The initial value is 0. See fglPixelTransfer. 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 floating-point representation such that 1.0 returns the most positive representable integer value, and -1.0 returns the most negative representable integer value. The initial value is 1. See fglClearDepth. GL_DEPTH_FUNC params returns one value, the symbolic constant that indicates the depth comparison function. The initial value is GL_LESS. See fglDepthFunc. GL_DEPTH_RANGE params returns two values: the near and far mapping limits for the depth buffer. Integer values, if requested, are linearly mapped from the internal floating-point representation such that 1.0 returns the most positive representable integer value, and -1.0 returns the most negative representable integer value. The initial value is (0, 1). See fglDepthRange. GL_DEPTH_SCALE params returns one value, the depth scale factor used during pixel transfers. The initial value is 1. See fglPixelTransfer. GL_DEPTH_TEST params returns a single boolean value indicating whether depth testing of fragments is enabled. The initial value is GL_FALSE. See fglDepthFunc and fglDepthRange. 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 fglDepthMask. GL_DETAIL_TEXTURE_2D_BINDING_SGIS params returns a single value, the name of the detail texture bound to GL_DETAIL_TEXTURE_2D_SGIS (or zero if there is none). See fglDetailTexFuncSGIS. GL_DISTANCE_ATTENUATION_SGIS params returns three values, the coefficients of the distance attentuation function for rendering points. See fglPointParameterSGIS. GL_DITHER params returns a single boolean value indicating whether dithering of fragment colors and indices is enabled. The initial value is GL_TRUE. GL_DOUBLEBUFFER params returns a single boolean value indicating whether double buffering is supported. GL_DRAW_BUFFER params returns one value, a symbolic constant indicating which buffers are being drawn to. See fglDrawBuffer. 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 fglEdgeFlag. 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 fglEdgeFlagPointer. 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 fglEdgeFlagPointer. GL_FOG params returns a single boolean value indicating whether fogging is enabled. The initial value is GL_FALSE. See fglFog. 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 positive representable integer value, and -1.0 returns the most negative representable integer value. The initial value is (0, 0, 0, 0). See fglFog. GL_FOG_DENSITY params returns one value, the fog density parameter. The initial value is 1. See fglFog. GL_FOG_END params returns one value, the end factor for the linear fog equation. The initial value is 1. See fglFog. GL_FOG_FUNC_POINTS_SGIS params returns one value, the number of points in the current custom fog blending function. See fglFog and fglFogFuncSGIS. GL_FOG_FUNC_SGIS params returns an array of fog blending function control points. Each control point consists of two values, an eye-space distance and a blending factor, in that order. The control points are listed in order of increasing eye-space distance. The number of control points may be queried by fglGet with argument GL_FOG_FUNC_POINTS_SGIS. See fglFog and fglFogFuncSGIS. 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 fglHint. GL_FOG_INDEX params returns one value, the fog color index. The initial value is 0. See fglFog. GL_FOG_MODE params returns one value, a symbolic constant indicating which fog equation is selected. The initial value is GL_EXP. See fglFog. GL_FOG_START params returns one value, the start factor for the linear fog equation. The initial value is 0. See fglFog GL_FOG_OFFSET_SGIX params returns a single boolean value indicating whether fog offset is enabled. See fglFog. GL_FOG_OFFSET_VALUE_SGIX params returns four values, a reference point (X,Y,Z) in eye coordinates, and a Z offset in eye coordinates. See fglFog. 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 fglFrontFace. 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 transfers. The initial value is 1. See fglPixelTransfer. GL_HISTOGRAM_EXT params returns a single boolean value indicating whether histogramming is enabled. See fglHistogramEXT. GL_INDEX_ARRAY params returns a single boolean value indicating whether the color index array is enabled. The initial value is GL_FALSE. See fglIndexPointer. 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 fglIndexPointer. 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 fglIndexPointer. 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 fglClearIndex. 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 initial value is GL_FALSE. See fglLogicOp. 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 during pixel transfers. The initial value is 0. See fglPixelTransfer. 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 fglPixelTransfer. 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 fglIndexMask. GL_INSTRUMENT_MEASUREMENTS_SGIX params returns one value, the number of outstanding instrumentation requests made since the instrumentation buffer was specified. See fglInstrumentsBufferSGIX. GL_INTERLACE_SGIX params returns a single boolean value indicating whether fglCopyPixels and fglCopyTexSubImage2DEXT skip every other line in the destination pixel array. See fglCopyPixels and fglCopyTexSubImage2DEXT. GL_LIGHTi params returns a single boolean value indicating whether the specified light is enabled. The initial value is GL_FALSE. See fglLight and fglLightModel. GL_LIGHTING params returns a single boolean value indicating whether lighting is enabled. The initial value is GL_FALSE. See fglLightModel. 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 fglLightModel. 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 fglLightModel. 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 initial value is GL_FALSE. See fglLightModel. GL_LINE_SMOOTH params returns a single boolean value indicating whether antialiasing of lines is enabled. The initial value is GL_FALSE. See fglLineWidth. 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 fglHint. GL_LINE_STIPPLE params returns a single boolean value indicating whether stippling of lines is enabled. The initial value is GL_FALSE. See fglLineStipple. GL_LINE_STIPPLE_PATTERN params returns one value, the 16-bit line stipple pattern. The initial value is all 1's. See fglLineStipple. GL_LINE_STIPPLE_REPEAT params returns one value, the line stipple repeat factor. The initial value is 1. See fglLineStipple. GL_LINE_WIDTH params returns one value, the line width as specified with fglLineWidth. The initial value is 1. GL_LINE_WIDTH_GRANULARITY params returns one value, the width difference between adjacent supported widths for antialiased lines. See fglLineWidth. GL_LINE_WIDTH_RANGE params returns two values: the smallest and largest supported widths for antialiased lines. See fglLineWidth. GL_LIST_BASE params returns one value, the base offset added to all names in arrays presented to fglCallLists. The initial value is 0. See fglListBase. GL_LIST_INDEX params returns one value, the name of the display list currently under construction. 0 is returned if no display list is currently under construction. The initial value is 0. See fglNewList. 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 fglNewList. GL_LOGIC_OP_MODE params returns one value, a symbolic constant indicating the selected logic operation mode. The initial value is GL_COPY. See fglLogicOp. GL_MAP1_COLOR_4 params returns a single boolean value indicating whether 1D evaluation generates colors. The initial value is GL_FALSE. See fglMap1. GL_MAP1_GRID_DOMAIN params returns two values: the endpoints of the 1D map's grid domain. The initial value is (0, 1). See fglMapGrid. 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 fglMapGrid. GL_MAP1_INDEX params returns a single boolean value indicating whether 1D evaluation generates color indices. The initial value is GL_FALSE. See fglMap1. GL_MAP1_NORMAL params returns a single boolean value indicating whether 1D evaluation generates normals. The initial value is GL_FALSE. See fglMap1. GL_MAP1_TEXTURE_COORD_1 params returns a single boolean value indicating whether 1D evaluation generates 1D texture coordinates. The initial value is GL_FALSE. See fglMap1. GL_MAP1_TEXTURE_COORD_2 params returns a single boolean value indicating whether 1D evaluation generates 2D texture coordinates. The initial value is GL_FALSE. See fglMap1. GL_MAP1_TEXTURE_COORD_3 params returns a single boolean value indicating whether 1D evaluation generates 3D texture coordinates. The initial value is GL_FALSE. See fglMap1. GL_MAP1_TEXTURE_COORD_4 params returns a single boolean value indicating whether 1D evaluation generates 4D texture coordinates. The initial value is GL_FALSE. See fglMap1. GL_MAP1_VERTEX_3 params returns a single boolean value indicating whether 1D evaluation generates 3D vertex coordinates. The initial value is GL_FALSE. See fglMap1. GL_MAP1_VERTEX_4 params returns a single boolean value indicating whether 1D evaluation generates 4D vertex coordinates. The initial value is GL_FALSE. See fglMap1. GL_MAP2_COLOR_4 params returns a single boolean value indicating whether 2D evaluation generates colors. The initial value is GL_FALSE. See fglMap2. 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 fglMapGrid. 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 fglMapGrid. GL_MAP2_INDEX params returns a single boolean value indicating whether 2D evaluation generates color indices. The initial value is GL_FALSE. See fglMap2. GL_MAP2_NORMAL params returns a single boolean value indicating whether 2D evaluation generates normals. The initial value is GL_FALSE. See fglMap2. GL_MAP2_TEXTURE_COORD_1 params returns a single boolean value indicating whether 2D evaluation generates 1D texture coordinates. The initial value is GL_FALSE. See fglMap2. GL_MAP2_TEXTURE_COORD_2 params returns a single boolean value indicating whether 2D evaluation generates 2D texture coordinates. The initial value is GL_FALSE. See fglMap2. GL_MAP2_TEXTURE_COORD_3 params returns a single boolean value indicating whether 2D evaluation generates 3D texture coordinates. The initial value is GL_FALSE. See fglMap2. GL_MAP2_TEXTURE_COORD_4 params returns a single boolean value indicating whether 2D evaluation generates 4D texture coordinates. The initial value is GL_FALSE. See fglMap2. GL_MAP2_VERTEX_3 params returns a single boolean value indicating whether 2D evaluation generates 3D vertex coordinates. The initial value is GL_FALSE. See fglMap2. GL_MAP2_VERTEX_4 params returns a single boolean value indicating whether 2D evaluation generates 4D vertex coordinates. The initial value is GL_FALSE. See fglMap2. 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 fglPixelTransfer. 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 fglPixelTransfer. 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 fglMatrixMode. GL_MAX_3D_TEXTURE_SIZE_EXT params returns one value, the maximum width, height, or depth of any 3D texture image (without borders). See fglTexImage3DEXT. GL_MAX_CLIENT_ATTRIB_STACK_DEPTH params returns one value indicating the maximum supported depth of the client attribute stack. See fglPushClientAttrib. 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 fglPushAttrib. GL_MAX_CLIP_PLANES params returns one value, the maximum number of application-defined clipping planes. The value must be at least 6. See fglClipPlane. GL_MAX_CLIPMAP_DEPTH_SGIX params returns one value, the maximum number of levels permitted in a clipmap. See fglTexParameter. GL_MAX_CLIPMAP_VIRTUAL_DEPTH_SGIX params returns one value, the maximum number of levels permitted in a virtual clipmap. See fglTexParameter. GL_MAX_COLOR_MATRIX_STACK_DEPTH_SGI params returns one value, the maximum supported depth of the color matrix stack. See fglPushMatrix, fglPixelTransfer. 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 fglMap1 and fglMap2. GL_MAX_FOG_FUNC_POINTS_SGIS params returns one value, the maximum number of control points supported in custom fog blending functions. See fglFog and fglFogFuncSGIS. GL_MAX_LIGHTS params returns one value, the maximum number of lights. The value must be at least 8. See fglLight. 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 fglCallList. 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 fglPushMatrix. 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 fglPushName. GL_MAX_PIXEL_MAP_TABLE params returns one value, the maximum supported size of a fglPixelMap lookup table. The value must be at least 32. See fglPixelMap. 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 fglPushMatrix. 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 fglTexImage1D and fglTexImage2D. 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 fglPushMatrix. 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 fglViewport. GL_MINMAX_EXT params returns a single boolean value indicating whether the pixel transfer min/max computation is enabled. See fglMinmaxEXT. 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 fglPushMatrix. GL_MODELVIEW_STACK_DEPTH params returns one value, the number of matrices on the modelview matrix stack. The initial value is 1. See fglPushMatrix. GL_NAME_STACK_DEPTH params returns one value, the number of names on the selection name stack. The initial value is 0. See fglPushName. GL_MULTISAMPLE_SGIS params returns a single boolean value indicating whether multisampling is enabled. See fglSamplePatternSGIS. GL_NORMAL_ARRAY params returns a single boolean value, indicating whether the normal array is enabled. The initial value is GL_FALSE. See fglNormalPointer. GL_NORMAL_ARRAY_STRIDE params returns one value, the byte offset between consecutive normals in the normal array. The initial value is 0. See fglNormalPointer. 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 fglNormalPointer. GL_NORMALIZE params returns a single boolean value indicating whether normals are automatically scaled to unit length after they have been transformed to eye coordinates. The initial value is GL_FALSE. See fglNormal. GL_PACK_ALIGNMENT params returns one value, the byte alignment used for writing pixel data to memory. The initial value is 4. See fglPixelStore. GL_PACK_IMAGE_HEIGHT_EXT params returns one value, the image height used for writing (3D) pixel data to memory. See fglPixelStore. 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 fglPixelStore. GL_PACK_ROW_LENGTH params returns one value, the row length used for writing pixel data to memory. The initial value is 0. See fglPixelStore. GL_PACK_SKIP_IMAGES_EXT params returns one value, the number of 2D images skipped before the first pixel is written into memory. See fglPixelStore. 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 fglPixelStore. 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 fglPixelStore. GL_PACK_SWAP_BYTES params returns a single boolean value indicating whether the bytes of two-byte and four-byte pixel indices and components are swapped before being written to memory. The initial value is GL_FALSE. See fglPixelStore. 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 fglHint. 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 fglPixelMap. 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 fglPixelMap. 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 fglPixelMap. 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 fglPixelMap. 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 fglPixelMap. 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 fglPixelMap. 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 fglPixelMap. GL_PIXEL_MAP_I_TO_R_SIZE params returns one value, the size of the index-to-red pixel translation table. The initial value is 1. See fglPixelMap. GL_PIXEL_MAP_R_TO_R_SIZE params returns one value, the size of the red- to-red pixel translation table. The initial value is 1. See fglPixelMap. GL_PIXEL_MAP_S_TO_S_SIZE params returns one value, the size of the stencil-to-stencil pixel translation table. The initial value is 1. See fglPixelMap. GL_POINT_FADE_THRESHOLD_SIZE_SGIS params returns one value, the size at which a dynamically-sized point will begin to fade (in order to further reduce its brightness). See fglPointParameterSGIS. GL_POINT_SIZE params returns one value, the point size as specified by fglPointSize. The initial value is 1. GL_POINT_SIZE_MAX_SGIS params returns one value, the maximum allowable size for dynamically-sized points. See fglPointParameterSGIS. GL_POINT_SIZE_MIN_SGIS params returns one value, the minimum allowable size for dynamically-sized points. See fglPointParameterSGIS. GL_POINT_SIZE_GRANULARITY params returns one value, the size difference between adjacent supported sizes for antialiased points. See fglPointSize. 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 fglPointSize. GL_POINT_SMOOTH params returns a single boolean value indicating whether antialiasing of points is enabled. The initial value is GL_FALSE. See fglPointSize. 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 fglHint. 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 fglPolygonMode. GL_POLYGON_OFFSET_BIAS_EXT params returns one value, the constant which is added to the z value of each fragment generated when a polygon is rasterized. See fglPolygonOffsetEXT. GL_POLYGON_OFFSET_EXT params returns a single boolean value indicating whether polygon offset is enabled. See fglPolygonOffsetEXT. 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 fglPolygonOffset. GL_POLYGON_OFFSET_UNITS params returns one value. This value is multiplied by an implementation-specific value and then added to the depth value of each fragment generated when a polygon is rasterized. The initial value is 0. See fglPolygonOffset. 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 fglPolygonOffset. 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 fglPolygonOffset. 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 fglPolygonOffset. GL_POLYGON_OFFSET_UNITS params returns one value. This value is multiplied by an implementation-specific value and then added to the depth value of each fragment generated when a polygon is rasterized. The initial value is 0. See fglPolygonOffset. GL_POLYGON_SMOOTH params returns a single boolean value indicating whether antialiasing of polygons is enabled. The initial value is GL_FALSE. See fglPolygonMode. 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 fglHint. GL_POLYGON_STIPPLE params returns a single boolean value indicating whether polygon stippling is enabled. The initial value is GL_FALSE. See fglPolygonStipple. GL_POST_COLOR_MATRIX_ALPHA_BIAS_SGI params returns a single value, the bias term to be added to alpha immediately after multiplication by the top of the color matrix stack. See fglPixelTransfer. GL_POST_COLOR_MATRIX_ALPHA_SCALE_SGI params returns a single value, the scale factor to be applied to alpha immediately after multiplication by the top of the color matrix stack. See fglPixelTransfer. GL_POST_COLOR_MATRIX_BLUE_BIAS_SGI params returns a single value, the bias term to be added to blue immediately after multiplication by the top of the color matrix stack. See fglPixelTransfer. GL_POST_COLOR_MATRIX_BLUE_SCALE_SGI params returns a single value, the scale factor to be applied to blue immediately after multiplication by the top of the color matrix stack. See fglPixelTransfer. GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI params returns a single boolean value indicating whether colors are passed through a lookup table before being processed by the histogram operation. See fglColorTableSGI. GL_POST_COLOR_MATRIX_GREEN_BIAS_SGI params returns a single value, the bias term to be added to green immediately after multiplication by the top of the color matrix stack. See fglPixelTransfer. GL_POST_COLOR_MATRIX_GREEN_SCALE_SGI params returns a single value, the scale factor to be applied to green immediately after multiplication by the top of the color matrix stack. See fglPixelTransfer. GL_POST_COLOR_MATRIX_RED_BIAS_SGI params returns a single value, the bias term to be added to red immediately after multiplication by the top of the color matrix stack. See fglPixelTransfer. GL_POST_COLOR_MATRIX_RED_SCALE_SGI params returns a single value, the scale factor to be applied to red immediately after multiplication by the top of the color matrix stack. See fglPixelTransfer. GL_POST_CONVOLUTION_ALPHA_BIAS_EXT params returns a single value, the bias term to be added to alpha immediately after convolution. See fglConvolutionFilter1DEXT, fglConvolutionFilter2DEXT, and fglSeparableFilter2DEXT. GL_POST_CONVOLUTION_ALPHA_SCALE_EXT params returns a single value, the scale factor to be applied to alpha immediately after convolution. See fglConvolutionFilter1DEXT, fglConvolutionFilter2DEXT, and fglSeparableFilter2DEXT. GL_POST_CONVOLUTION_BLUE_BIAS_EXT params returns a single value, the bias term to be added to blue immediately after convolution. See fglConvolutionFilter1DEXT, fglConvolutionFilter2DEXT, and fglSeparableFilter2DEXT. GL_POST_CONVOLUTION_BLUE_SCALE_EXT params returns a single value, the scale factor to be applied to blue immediately after convolution. See fglConvolutionFilter1DEXT, fglConvolutionFilter2DEXT, and fglSeparableFilter2DEXT. GL_POST_CONVOLUTION_COLOR_TABLE_SGI params returns a single boolean value indicating whether colors are passed through a lookup table before being processed by the color matrix operation. See fglColorTableSGI. GL_POST_CONVOLUTION_GREEN_BIAS_EXT params returns a single value, the bias term to be added to green immediately after convolution. See fglConvolutionFilter1DEXT, fglConvolutionFilter2DEXT, and fglSeparableFilter2DEXT. GL_POST_CONVOLUTION_GREEN_SCALE_EXT params returns a single value, the scale factor to be applied to green immediately after convolution. See fglConvolutionFilter1DEXT, fglConvolutionFilter2DEXT, and fglSeparableFilter2DEXT. GL_POST_CONVOLUTION_RED_BIAS_EXT params returns a single value, the bias term to be added to red immediately after convolution. See fglConvolutionFilter1DEXT, fglConvolutionFilter2DEXT, and fglSeparableFilter2DEXT. GL_POST_CONVOLUTION_RED_SCALE_EXT params returns a single value, the scale factor to be applied to red immediately after convolution. See fglConvolutionFilter1DEXT, fglConvolutionFilter2DEXT, and fglSeparableFilter2DEXT. GL_POST_TEXTURE_FILTER_BIAS_RANGE_SGIX params returns two values: the minimum and maximum values for the texture bias factors. See fglTexParameterfv and fglTexParameteriv. GL_POST_TEXTURE_FILTER_SCALE_RANGE_SGIX params returns two values: the minimum and maximum values for the texture scale factors. 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 fglPushMatrix. GL_PROJECTION_STACK_DEPTH params returns one value, the number of matrices on the projection matrix stack. The initial value is 1. See fglPushMatrix. 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 fglReadPixels and fglAccum. 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 fglPixelTransfer. GL_REFERENCE_PLANE_EQUATION_SGIX params returns four values, the coefficients of the plane equation for the reference plane, expressed in clip coordinates. See fglReferencePlaneSGIX. GL_REFERENCE_PLANE_SGIX params returns a single boolean value indicating whether depth values for pixel fragments are computed from the reference plane (true) or from the primitive being drawn (false). See fglReferencePlaneSGIX. 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 fglRenderMode. GL_RGBA_MODE params returns a single boolean value indicating whether the GL is in RGBA mode (true) or color index mode (false). See fglColor. GL_SAMPLE_ALPHA_TO_MASK_SGIS params returns a single boolean value indicating whether fragment alpha values will modify the multisampling fragment mask. See fglSampleMaskSGIS. GL_SAMPLE_ALPHA_TO_ONE_SGIS params returns a single boolean value indicating whether fragment alpha will be set to the maximum possible value after modifying the multisampling fragment mask. See fglSampleMaskSGIS. GL_SAMPLE_BUFFERS_SGIS params returns one value, the number of multisample buffers. GL_SAMPLE_MASK_INVERT_SGIS params returns a single boolean value indicating whether the multisampling fragment modification mask is to be inverted. See fglSampleMaskSGIS. GL_SAMPLE_MASK_SGIS params returns a single boolean value indicating whether the multisampling fragment mask will be modified by a coverage mask. See fglSampleMaskSGIS. GL_SAMPLE_MASK_VALUE_SGIS params returns one value, the coverage of the multisampling fragment modification mask. See fglSampleMaskSGIS. GL_SAMPLE_PATTERN_SGIS params returns one value, a symbolic constant indicating the multisampling pattern. See fglSamplePatternSGIS. GL_SAMPLES_SGIS params returns one value, the number of samples per pixel used for multisampling. 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 fglScissor. GL_SCISSOR_TEST params returns a single boolean value indicating whether scissoring is enabled. The initial value is GL_FALSE. See fglScissor. GL_SEPARABLE_2D_EXT params returns a single boolean value indicating whether separable two-dimensional convolution will be performed during pixel transfers. See fglSeparableFilter2DEXT. 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 fglShadeModel. GL_SPRITE_AXIS_SGIX params returns three values that specify the current sprite rotation axis. See fglSpriteParameterSGIX. GL_SPRITE_MODE_SGIX params returns one value, a symbolic constant indicating the current sprite mode. See fglSpriteParameterSGIX. GL_SPRITE_SGIX params returns a single boolean value indicating whether the sprite transformation is enabled. See fglSpriteParameterSGIX. GL_SPRITE_TRANSLATION_SGIX params returns three values that specify the current sprite translation. See fglSpriteParameterSGIX. 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 fglClearStencil. 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 fglStencilOp. 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 fglStencilFunc. 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 fglStencilOp. 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 fglStencilOp. GL_STENCIL_REF params returns one value, the reference value that is compared with the contents of the stencil buffer. The initial value is 0. See fglStencilFunc. GL_STENCIL_TEST params returns a single boolean value indicating whether stencil testing of fragments is enabled. The initial value is GL_FALSE. See fglStencilFunc and fglStencilOp. 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 fglStencilFunc. GL_STENCIL_WRITEMASK params returns one value, the mask that controls writing of the stencil bitplanes. The initial value is all 1's. See fglStencilMask. GL_STEREO params returns a single boolean value indicating whether stereo buffers (left and right) are supported. GL_SUBPIXEL_BITS params returns one value, an estimate of the number of bits of subpixel resolution that are used to position rasterized geometry in window coordinates. The 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 fglTexImage1D. GL_TEXTURE_1D_BINDING params returns a single value, the name of the texture currently bound to the target GL_TEXTURE_1D. The initial value is 0. See fglBindTexture. GL_TEXTURE_2D params returns a single boolean value indicating whether 2D texture mapping is enabled. The initial value is GL_FALSE. See fglTexImage2D. GL_TEXTURE_2D_BINDING params returns a single value, the name of the texture currently bound to the target GL_TEXTURE_2D. The initial value is 0. See fglBindTexture. GL_TEXTURE_2D_BINDING_EXT params returns a single value, the name of the texture currently bound to the target GL_TEXTURE_2D. See fglBindTextureEXT. GL_TEXTURE_3D_EXT params returns a single boolean value indicating whether 3D texture mapping is enabled. See fglTexImage3DEXT. GL_TEXTURE_3D_BINDING_EXT params returns a single value, the name of the texture currently bound to the target GL_TEXTURE_3D_EXT. See fglBindTextureEXT. GL_TEXTURE_COLOR_TABLE_SGI params returns a single boolean value indicating whether texture colors are passed through a lookup table before being used to generate pixel fragments. See fglColorTableSGI. GL_TEXTURE_COORD_ARRAY params returns a single boolean value indicating whether the texture coordinate array is enabled. The initial value is GL_FALSE. See fglTexCoordPointer. GL_TEXTURE_COORD_ARRAY_SIZE params returns one value, the number of coordinates per element in the texture coordinate array. The initial value is 4. See fglTexCoordPointer. 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 fglTexCoordPointer. 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 fglTexCoordPointer. GL_TEXTURE_GEN_Q params returns a single boolean value indicating whether automatic generation of the q texture coordinate is enabled. The initial value is GL_FALSE. See fglTexGen. GL_TEXTURE_GEN_R params returns a single boolean value indicating whether automatic generation of the r texture coordinate is enabled. The initial value is GL_FALSE. See fglTexGen. GL_TEXTURE_GEN_S params returns a single boolean value indicating whether automatic generation of the S texture coordinate is enabled. The initial value is GL_FALSE. See fglTexGen. GL_TEXTURE_GEN_T params returns a single boolean value indicating whether automatic generation of the T texture coordinate is enabled. The initial value is GL_FALSE. See fglTexGen. 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 fglPushMatrix. GL_TEXTURE_STACK_DEPTH params returns one value, the number of matrices on the texture matrix stack. The initial value is 1. See fglPushMatrix. GL_UNPACK_ALIGNMENT params returns one value, the byte alignment used for reading pixel data from memory. The initial value is 4. See fglPixelStore. GL_UNPACK_IMAGE_HEIGHT_EXT params returns one value, the image height used for reading (3D) pixel data from memory. See fglPixelStore. 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 fglPixelStore. GL_UNPACK_ROW_LENGTH params returns one value, the row length used for reading pixel data from memory. The initial value is 0. See fglPixelStore. GL_UNPACK_SKIP_IMAGES params returns one value, the number of images skipped before the first (3D) pixel is read from memory. See fglPixelStore. 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 fglPixelStore. 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 fglPixelStore. GL_UNPACK_SWAP_BYTES params returns a single boolean value indicating whether the bytes of two-byte and four-byte pixel indices and components are swapped after being read from memory. The initial value is GL_FALSE. See fglPixelStore. GL_VERTEX_ARRAY params returns a single boolean value indicating whether the vertex array is enabled. The initial value is GL_FALSE. See fglVertexPointer. GL_VERTEX_ARRAY_SIZE params returns one value, the number of coordinates per vertex in the vertex array. The initial value is 4. See fglVertexPointer. GL_VERTEX_ARRAY_STRIDE params returns one value, the byte offset between consecutive vertexes in the vertex array. The initial value is 0. See fglVertexPointer. 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 fglVertexPointer. 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 fglViewport. GL_ZOOM_X params returns one value, the x pixel zoom factor. The initial value is 1. See fglPixelZoom. GL_ZOOM_Y params returns one value, the y pixel zoom factor. The initial value is 1. See fglPixelZoom. Many of the boolean parameters can also be queried more easily using fglIsEnabled. NOTES GL_COLOR_ARRAY, GL_COLOR_ARRAY_SIZE, GL_COLOR_ARRAY_STRIDE, GL_COLOR_ARRAY_TYPE, GL_COLOR_LOGIC_OP, 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_FACTOR, GL_POLYGON_OFFSET_FILL, GL_POLYGON_OFFSET_LINE, GL_POLYGON_OFFSET_POINT, GL_POLYGON_OFFSET_UNITS, 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. ERRORS GL_INVALID_ENUM is generated if pname is not an accepted value. GL_INVALID_OPERATION is generated if fglGet is executed between the execution of fglBegin and the corresponding execution of fglEnd. MACHINE DEPENDENCIES GL_COLOR_TABLE_SGI, GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI and GL_POST_CONVOLUTION_COLOR_TABLE_SGI are part of the SGI_color_table extension which is not supported on RealityEngine, RealityEngine2, and VTX systems. RealityEngine, RealityEngine2, and VTX systems do not support GL_DETAIL_TEXTURE_2D_BINDING_SGIS. The SGIX_interlace extension is supported only on InfiniteReality systems, on RealityEngine, RealityEngine2, and VTX systems, and on O2 systems. On InfiniteReality systems, if the post-texture filter scale and bias values are set to values other than the defaults, they are limited to the range [0.0, 1.0). (note: this range excludes 1.0.) The SGIX_texture_scale_bias extension is not supported on RealityEngine, RealityEngine2, and VTX systems or on High Impact and Maximum Impact systems. SEE ALSO fglGetClipPlane, fglGetError, fglGetLight, fglGetMap, fglGetMaterial, fglGetPixelMap, fglGetPointerv, fglGetPolygonStipple, fglGetString, fglGetTexEnv, fglGetTexGen, fglGetTexImage, fglGetTexLevelParameter, fglGetTexParameter, fglIsEnabled