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#lang scribble/doc
@(require "common.rkt" scribble/bnf scribble/eval (for-syntax racket/base))

@title[#:tag "gl"]{C-Style OpenGL}

@defmodule[sgl/gl]

The @racketmodname[sgl/gl] module provides a direct interface to the
system's GL library closely following the conventions of the
C-language OpenGL API.  It provides a binding for each @tt{#defined}
constant (these start with @racketidfont{GL_}) and for the functions
in the GL 1.5 and GLU 1.3 specifications, except for the following:

@itemize[#:style 'compact
 @item{Vertex arrays           (GL 1.5, Section 2.8)}
 @item{Buffer objects          (GL 1.5, Section 2.9)}
 @item{@tt{glGetPointerv}      (GL 1.5, Section 6.1.11)}
 @item{Buffer object queries   (GL 1.5, Section 6.1.13)}
 @item{Polygon tessellation    (GLU 1.3, Section 5)}
 @item{@tt{gluQuadricCallback} (GLU 1.3, Section 6.2)}
 @item{NURBS callbacks         (GLU 1.3, Section 7.2)}
]

If one of the provided functions is not present on your system
(e.g. if your system supports only GL 1.3), then the corresponding
@racketmodname[sgl/gl] function raises a run-time exception when
invoked.

The functions provided by @racketmodname[sgl/gl] perform comparable
checking to their C-language counterparts; they check the types of
their arguments, but do not check the length of array arguments.  The
following details the kinds of Racket values that can be provided for
each primitive OpenGL type:

@itemize[

 @item{@as-index{@tt{GLbyte}},
       @as-index{@tt{GLshort}},
       @as-index{@tt{GLint}}:
       exact integer in the proper range}

 @item{@as-index{@tt{GLubyte}},
       @as-index{@tt{GLushort}},
       @as-index{@tt{GLuint}}:
       exact non-negative integer in the proper range}

 @item{@as-index{@tt{GLsizei}},
       @as-index{@tt{GLenum}},
       @as-index{@tt{GLbitfield}}:
       exact non-negative integer in the proper range}

 @item{@as-index{@tt{GFfloat}},
       @as-index{@tt{GLdouble}}:
       real number}

 @item{@as-index{@tt{GFclampf}},
       @as-index{@tt{GLclampd}}:
       real number}

 @item{@as-index{@tt{GLboolean}}: any value, where @racket[#f] means
       @as-index{@tt{GL_FALSE}} and all other values mean
       @as-index{@tt{GL_TRUE}}; do not use @racket[GL_FALSE] or
       @racket[GL_TRUE], since they are bound to integers, both will
       end up being converted to GL_TRUE.}

]
				    
OpenGL functions that take vector arguments accept @racket[cvector]
values. The type of the @racket[cvector] is checked; for example,
@tt{glVertex3fv} expects a vector of @tt{GLfloats}, so
@racket[glVertex3fv] accepts only a @racket[cvector] containing reals.
See also @racketmodname[sgl/gl-vectors]. Functions that accept arrays
of type @tt{void*} accept any @racket[cvector]; you must ensure that
you supply the proper kind of vector, as in the C-language OpenGL API.

@as-examples[
@racketblock[
(require sgl/gl
         sgl/gl-vectors)
(glBegin GL_TRIANGLES)
(glVertex3i 1 2 3)
(glVertex4fv (gl-float-vector 1 2 3 4))
(glEnd)
]]

@(define-syntax-rule (def-C-gl (id ...) body ...)
   @deftogether[(
    @defthing[id procedure?] ...
   ) body ...])

@def-C-gl[(
   glPixelMapfv
   glPixelMapuiv
   glPixelMapusv
   glDeleteTextures
   glDeleteQueries
)]{

These functions do not take a size argument, because it is derived
from the length of the argument vector.}

@def-C-gl[(
   glGenTextures
   glGenQueries
)]{

These functions do not take vector arguments.  Instead, they allocate
a vector of the requested size and return it.}

@def-C-gl[(
   glAreTexturesResident
)]{

This function takes in a @tt{GLuint} vector and textures, and it
returns 2 values: the specified boolean and a boolean vector of
residences.}

@def-C-gl[(
   glGetBooleanv
   glGetIntegerv
   glGetFloatv
   glGetDoublev
   glGetLightfv
   glGetLightiv
   glGetMaterialfv
   glGetMaterialiv
   glGetTexEnvfv
   glGetTexEnviv
   glGetTexGendv
   glGetTexGenfv
   glGetTexGeniv
   glGetTexParameterfv
   glGetTexParameteriv
   glGetTexLevelParameterfv
   glGetTexLevelParameteriv
   glGetPixelMapfv
   glGetPixelMapuiv
   glGetPixelMapusv
   glGetMapdv
   glGetMapfv
   glGetMapiv
   glGetBufferParameteriv
   glGetConvolutionParameterfv
   glGetConvolutionParameteriv
   glGetHistogramParameterfv
   glGetHistogramParameteriv
   glGetMinmaxParameterfv
   glGetMinmaxParameteriv
   glGetQueryiv
   glGetQueryObjectiv
   glGetQueryObjectuiv
)]{

Instead of taking a vector argument, these function take an integer argument
that specifies the size of the vector that is returned.}

@def-C-gl[(
   glGetClipPlane
)]{

This function does not take a vector argument and returns a @tt{GLdouble} vector of
length 4.}

@def-C-gl[(
   glGetString
   gluCheckExtension
   gluErrorString
   gluGetString
)]{
These functions deal with strings instead of @tt{GLubyte} vectors.}

@def-C-gl[(
   gluProject
   gluUnProject
   gluUnProject4
)]{

Instead of taking pointers to @tt{GLdoubles} for return values, these
function directly return @tt{GLdouble} vectors.}

@def-C-gl[(
   glSelectBuffer
   glFeedbackBuffer
)]{

These functions do not take vectors, instead they return a
@racket[selection-buffer-object] or @racket[feedback-buffer-object].
The @racket[select-buffer->gl-uint-vector] and
@racket[feedback-buffer->gl-float-vector] functions copy the contents
of the buffer into a vector.  Because the OpenGL library writes to the
buffer-object on OpenGL function calls after @tt{glSelectBuffer} or
@tt{glFeedbackBuffer} has returned, if the buffer is garbage collected
before OpenGL is finished writing to it, the entire Racket system can
crash.  The @racket[gl-process-selection] function in
@racketmodname[sgl] helps interpret the results of @tt{glSelectBuffer}
in a Racket-friendly format.}

@def-C-gl[(
glAccum
glActiveTexture
glAlphaFunc
glBegin
glBeginQuery
glBindTexture
glBitmap
glBlendColor
glBlendEquation
glBlendFunc
glBlendFuncSeparate
glCallList
glCallLists
glClear
glClearAccum
glClearColor
glClearDepth
glClearIndex
glClearStencil
glClipPlane
glColor3b
glColor3bv
glColor3d
glColor3dv
glColor3f
glColor3fv
glColor3i
glColor3iv
glColor3s
glColor3sv
glColor3ub
glColor3ubv
glColor3ui
glColor3uiv
glColor3us
glColor3usv
glColor4b
glColor4bv
glColor4d
glColor4dv
glColor4f
glColor4fv
glColor4i
glColor4iv
glColor4s
glColor4sv
glColor4ub
glColor4ubv
glColor4ui
glColor4uiv
glColor4us
glColor4usv
glColorMask
glColorMaterial
glColorSubTable
glColorTable
glColorTableParameterfv
glColorTableParameteriv
glCompressedTexImage1D
glCompressedTexImage2D
glCompressedTexImage3D
glCompressedTexSubImage1D
glCompressedTexSubImage2D
glCompressedTexSubImage3D
glConvolutionFilter1D
glConvolutionFilter2D
glConvolutionParameterf
glConvolutionParameterfv
glConvolutionParameteri
glConvolutionParameteriv
glCopyColorSubTable
glCopyColorTable
glCopyConvolutionFilter1D
glCopyConvolutionFilter2D
glCopyPixels
glCopyTexImage1D
glCopyTexImage2D
glCopyTexSubImage1D
glCopyTexSubImage2D
glCopyTexSubImage3D
glCullFace
glDeleteLists
glDepthFunc
glDepthMask
glDepthRange
glDisable
glDrawBuffer
glDrawPixels
glEdgeFlag
glEdgeFlagv
glEnable
glEnd
glEndList
glEndQuery
glEvalCoord1d
glEvalCoord1dv
glEvalCoord1f
glEvalCoord1fv
glEvalCoord2d
glEvalCoord2dv
glEvalCoord2f
glEvalCoord2fv
glEvalMesh1
glEvalMesh2
glEvalPoint1
glEvalPoint2
glFinish
glFlush
glFogCoordd
glFogCoorddv
glFogCoordf
glFogCoordfv
glFogf
glFogfv
glFogi
glFogiv
glFrontFace
glFrustum
glGenLists
glGetColorTable
glGetCompressedTexImage
glGetConvolutionFilter
glGetError
glGetHistogram
glGetMinmax
glGetPolygonStipple
glGetSeparableFilter
glGetTexImage
glHint
glHistogram
glIndexMask
glIndexd
glIndexdv
glIndexf
glIndexfv
glIndexi
glIndexiv
glIndexs
glIndexsv
glIndexub
glIndexubv
glInitNames
glIsBuffer
glIsEnabled
glIsList
glIsQuery
glIsTexture
glLightModelf
glLightModelfv
glLightModeli
glLightModeliv
glLightf
glLightfv
glLighti
glLightiv
glLineStipple
glLineWidth
glListBase
glLoadIdentity
glLoadMatrixd
glLoadMatrixf
glLoadName
glLoadTransposeMatrixd
glLoadTransposeMatrixf
glLogicOp
glMap1d
glMap1f
glMap2d
glMap2f
glMapGrid1d
glMapGrid1f
glMapGrid2d
glMapGrid2f
glMaterialf
glMaterialfv
glMateriali
glMaterialiv
glMatrixMode
glMinmax
glMultMatrixd
glMultMatrixf
glMultTransposeMatrixd
glMultTransposeMatrixf
glMultiTexCoord1d
glMultiTexCoord1dv
glMultiTexCoord1f
glMultiTexCoord1fv
glMultiTexCoord1i
glMultiTexCoord1iv
glMultiTexCoord1s
glMultiTexCoord1sv
glMultiTexCoord2d
glMultiTexCoord2dv
glMultiTexCoord2f
glMultiTexCoord2fv
glMultiTexCoord2i
glMultiTexCoord2iv
glMultiTexCoord2s
glMultiTexCoord2sv
glMultiTexCoord3d
glMultiTexCoord3dv
glMultiTexCoord3f
glMultiTexCoord3fv
glMultiTexCoord3i
glMultiTexCoord3iv
glMultiTexCoord3s
glMultiTexCoord3sv
glMultiTexCoord4d
glMultiTexCoord4dv
glMultiTexCoord4f
glMultiTexCoord4fv
glMultiTexCoord4i
glMultiTexCoord4iv
glMultiTexCoord4s
glMultiTexCoord4sv
glNewList
glNormal3b
glNormal3bv
glNormal3d
glNormal3dv
glNormal3f
glNormal3fv
glNormal3i
glNormal3iv
glNormal3s
glNormal3sv
glOrtho
glPassThrough
glPixelStoref
glPixelStorei
glPixelTransferf
glPixelTransferi
glPixelZoom
glPointParameterf
glPointParameterfv
glPointParameteri
glPointParameteriv
glPointSize
glPolygonMode
glPolygonOffset
glPolygonStipple
glPopAttrib
glPopClientAttrib
glPopMatrix
glPopName
glPushAttrib
glPushClientAttrib
glPushMatrix
glPushName
glRasterPos2d
glRasterPos2dv
glRasterPos2f
glRasterPos2fv
glRasterPos2i
glRasterPos2iv
glRasterPos2s
glRasterPos2sv
glRasterPos3d
glRasterPos3dv
glRasterPos3f
glRasterPos3fv
glRasterPos3i
glRasterPos3iv
glRasterPos3s
glRasterPos3sv
glRasterPos4d
glRasterPos4dv
glRasterPos4f
glRasterPos4fv
glRasterPos4i
glRasterPos4iv
glRasterPos4s
glRasterPos4sv
glReadBuffer
glReadPixels
glRectd
glRectdv
glRectf
glRectfv
glRecti
glRectiv
glRects
glRectsv
glRenderMode
glResetHistogram
glResetMinmax
glRotated
glRotatef
glSampleCoverage
glScaled
glScalef
glScissor
glSecondaryColor3b
glSecondaryColor3bv
glSecondaryColor3d
glSecondaryColor3dv
glSecondaryColor3f
glSecondaryColor3fv
glSecondaryColor3i
glSecondaryColor3iv
glSecondaryColor3s
glSecondaryColor3sv
glSecondaryColor3ub
glSecondaryColor3ubv
glSecondaryColor3ui
glSecondaryColor3uiv
glSecondaryColor3us
glSecondaryColor3usv
glSeparableFilter2D
glShadeModel
glStencilFunc
glStencilMask
glStencilOp
glTexCoord1d
glTexCoord1dv
glTexCoord1f
glTexCoord1fv
glTexCoord1i
glTexCoord1iv
glTexCoord1s
glTexCoord1sv
glTexCoord2d
glTexCoord2dv
glTexCoord2f
glTexCoord2fv
glTexCoord2i
glTexCoord2iv
glTexCoord2s
glTexCoord2sv
glTexCoord3d
glTexCoord3dv
glTexCoord3f
glTexCoord3fv
glTexCoord3i
glTexCoord3iv
glTexCoord3s
glTexCoord3sv
glTexCoord4d
glTexCoord4dv
glTexCoord4f
glTexCoord4fv
glTexCoord4i
glTexCoord4iv
glTexCoord4s
glTexCoord4sv
glTexEnvf
glTexEnvfv
glTexEnvi
glTexEnviv
glTexGend
glTexGendv
glTexGenf
glTexGenfv
glTexGeni
glTexGeniv
glTexImage1D
glTexImage2D
glTexImage3D
glTexParameterf
glTexParameterfv
glTexParameteri
glTexParameteriv
glTexSubImage1D
glTexSubImage2D
glTexSubImage3D
glTranslated
glTranslatef
glVertex2d
glVertex2dv
glVertex2f
glVertex2fv
glVertex2i
glVertex2iv
glVertex2s
glVertex2sv
glVertex3d
glVertex3dv
glVertex3f
glVertex3fv
glVertex3i
glVertex3iv
glVertex3s
glVertex3sv
glVertex4d
glVertex4dv
glVertex4f
glVertex4fv
glVertex4i
glVertex4iv
glVertex4s
glVertex4sv
glViewport
glWindowPos2d
glWindowPos2dv
glWindowPos2f
glWindowPos2fv
glWindowPos2i
glWindowPos2iv
glWindowPos2s
glWindowPos2sv
glWindowPos3d
glWindowPos3dv
glWindowPos3f
glWindowPos3fv
glWindowPos3i
glWindowPos3iv
glWindowPos3s
glWindowPos3sv
gluBuild1DMipmapLevels
gluBuild1DMipmaps
gluBuild2DMipmapLevels
gluBuild2DMipmaps
gluBuild3DMipmapLevels
gluBuild3DMipmaps
gluCylinder
gluDisk
gluLookAt
gluNewQuadric
gluOrtho2D
gluPartialDisk
gluPerspective
gluPickMatrix
gluQuadricDrawStyle
gluQuadricNormals
gluQuadricOrientation
gluQuadricTexture
gluScaleImage
gluSphere
)]{

These functions are all direct translations of the C OpenGL API.}

@(define-syntax def-one-thing
   (syntax-rules ()
    [(_ [id pred]) @defthing[id pred]]
    [(_ id) @defthing[id exact-integer?]]))

@(define-syntax-rule (def-C-const (decl ...) body ...)
  @deftogether[(
   @def-one-thing[decl] ...
  ) body ...])

@def-C-const[(
  GL_FALSE 
  GL_TRUE 
  GL_BYTE 
  GL_UNSIGNED_BYTE 
  GL_SHORT 
  GL_UNSIGNED_SHORT 
  GL_INT 
  GL_UNSIGNED_INT 
  GL_FLOAT 
  GL_DOUBLE 
  GL_2_BYTES 
  GL_3_BYTES 
  GL_4_BYTES 
  GL_POINTS 
  GL_LINES 
  GL_LINE_LOOP 
  GL_LINE_STRIP 
  GL_TRIANGLES 
  GL_TRIANGLE_STRIP 
  GL_TRIANGLE_FAN 
  GL_QUADS 
  GL_QUAD_STRIP 
  GL_POLYGON 
  GL_VERTEX_ARRAY 
  GL_NORMAL_ARRAY 
  GL_COLOR_ARRAY 
  GL_INDEX_ARRAY 
  GL_TEXTURE_COORD_ARRAY 
  GL_EDGE_FLAG_ARRAY 
  GL_VERTEX_ARRAY_SIZE 
  GL_VERTEX_ARRAY_TYPE 
  GL_VERTEX_ARRAY_STRIDE 
  GL_NORMAL_ARRAY_TYPE 
  GL_NORMAL_ARRAY_STRIDE 
  GL_COLOR_ARRAY_SIZE 
  GL_COLOR_ARRAY_TYPE 
  GL_COLOR_ARRAY_STRIDE 
  GL_INDEX_ARRAY_TYPE 
  GL_INDEX_ARRAY_STRIDE 
  GL_TEXTURE_COORD_ARRAY_SIZE 
  GL_TEXTURE_COORD_ARRAY_TYPE 
  GL_TEXTURE_COORD_ARRAY_STRIDE 
  GL_EDGE_FLAG_ARRAY_STRIDE 
  GL_VERTEX_ARRAY_POINTER 
  GL_NORMAL_ARRAY_POINTER 
  GL_COLOR_ARRAY_POINTER 
  GL_INDEX_ARRAY_POINTER 
  GL_TEXTURE_COORD_ARRAY_POINTER 
  GL_EDGE_FLAG_ARRAY_POINTER 
  GL_V2F 
  GL_V3F 
  GL_C4UB_V2F 
  GL_C4UB_V3F 
  GL_C3F_V3F 
  GL_N3F_V3F 
  GL_C4F_N3F_V3F 
  GL_T2F_V3F 
  GL_T4F_V4F 
  GL_T2F_C4UB_V3F 
  GL_T2F_C3F_V3F 
  GL_T2F_N3F_V3F 
  GL_T2F_C4F_N3F_V3F 
  GL_T4F_C4F_N3F_V4F 
  GL_MATRIX_MODE 
  GL_MODELVIEW 
  GL_PROJECTION 
  GL_TEXTURE 
  GL_POINT_SMOOTH 
  GL_POINT_SIZE 
  GL_POINT_SIZE_GRANULARITY 
  GL_POINT_SIZE_RANGE 
  GL_LINE_SMOOTH 
  GL_LINE_STIPPLE 
  GL_LINE_STIPPLE_PATTERN 
  GL_LINE_STIPPLE_REPEAT 
  GL_LINE_WIDTH 
  GL_LINE_WIDTH_GRANULARITY 
  GL_LINE_WIDTH_RANGE 
  GL_POINT 
  GL_LINE 
  GL_FILL 
  GL_CW 
  GL_CCW 
  GL_FRONT 
  GL_BACK 
  GL_POLYGON_MODE 
  GL_POLYGON_SMOOTH 
  GL_POLYGON_STIPPLE 
  GL_EDGE_FLAG 
  GL_CULL_FACE 
  GL_CULL_FACE_MODE 
  GL_FRONT_FACE 
  GL_POLYGON_OFFSET_FACTOR 
  GL_POLYGON_OFFSET_UNITS 
  GL_POLYGON_OFFSET_POINT 
  GL_POLYGON_OFFSET_LINE 
  GL_POLYGON_OFFSET_FILL 
  GL_COMPILE 
  GL_COMPILE_AND_EXECUTE 
  GL_LIST_BASE 
  GL_LIST_INDEX 
  GL_LIST_MODE 
  GL_NEVER 
  GL_LESS 
  GL_EQUAL 
  GL_LEQUAL 
  GL_GREATER 
  GL_NOTEQUAL 
  GL_GEQUAL 
  GL_ALWAYS 
  GL_DEPTH_TEST 
  GL_DEPTH_BITS 
  GL_DEPTH_CLEAR_VALUE 
  GL_DEPTH_FUNC 
  GL_DEPTH_RANGE 
  GL_DEPTH_WRITEMASK 
  GL_DEPTH_COMPONENT 
  GL_LIGHTING 
  GL_LIGHT0 
  GL_LIGHT1 
  GL_LIGHT2 
  GL_LIGHT3 
  GL_LIGHT4 
  GL_LIGHT5 
  GL_LIGHT6 
  GL_LIGHT7 
  GL_SPOT_EXPONENT 
  GL_SPOT_CUTOFF 
  GL_CONSTANT_ATTENUATION 
  GL_LINEAR_ATTENUATION 
  GL_QUADRATIC_ATTENUATION 
  GL_AMBIENT 
  GL_DIFFUSE 
  GL_SPECULAR 
  GL_SHININESS 
  GL_EMISSION 
  GL_POSITION 
  GL_SPOT_DIRECTION 
  GL_AMBIENT_AND_DIFFUSE 
  GL_COLOR_INDEXES 
  GL_LIGHT_MODEL_TWO_SIDE 
  GL_LIGHT_MODEL_LOCAL_VIEWER 
  GL_LIGHT_MODEL_AMBIENT 
  GL_FRONT_AND_BACK 
  GL_SHADE_MODEL 
  GL_FLAT 
  GL_SMOOTH 
  GL_COLOR_MATERIAL 
  GL_COLOR_MATERIAL_FACE 
  GL_COLOR_MATERIAL_PARAMETER 
  GL_NORMALIZE 
  GL_CLIP_PLANE0 
  GL_CLIP_PLANE1 
  GL_CLIP_PLANE2 
  GL_CLIP_PLANE3 
  GL_CLIP_PLANE4 
  GL_CLIP_PLANE5 
  GL_ACCUM_RED_BITS 
  GL_ACCUM_GREEN_BITS 
  GL_ACCUM_BLUE_BITS 
  GL_ACCUM_ALPHA_BITS 
  GL_ACCUM_CLEAR_VALUE 
  GL_ACCUM 
  GL_ADD 
  GL_LOAD 
  GL_MULT 
  GL_RETURN 
  GL_ALPHA_TEST 
  GL_ALPHA_TEST_REF 
  GL_ALPHA_TEST_FUNC 
  GL_BLEND 
  GL_BLEND_SRC 
  GL_BLEND_DST 
  GL_ZERO 
  GL_ONE 
  GL_SRC_COLOR 
  GL_ONE_MINUS_SRC_COLOR 
  GL_SRC_ALPHA 
  GL_ONE_MINUS_SRC_ALPHA 
  GL_DST_ALPHA 
  GL_ONE_MINUS_DST_ALPHA 
  GL_DST_COLOR 
  GL_ONE_MINUS_DST_COLOR 
  GL_SRC_ALPHA_SATURATE 
  GL_FEEDBACK 
  GL_RENDER 
  GL_SELECT 
  GL_2D 
  GL_3D 
  GL_3D_COLOR 
  GL_3D_COLOR_TEXTURE 
  GL_4D_COLOR_TEXTURE 
  GL_POINT_TOKEN 
  GL_LINE_TOKEN 
  GL_LINE_RESET_TOKEN 
  GL_POLYGON_TOKEN 
  GL_BITMAP_TOKEN 
  GL_DRAW_PIXEL_TOKEN 
  GL_COPY_PIXEL_TOKEN 
  GL_PASS_THROUGH_TOKEN 
  GL_FEEDBACK_BUFFER_POINTER 
  GL_FEEDBACK_BUFFER_SIZE 
  GL_FEEDBACK_BUFFER_TYPE 
  GL_SELECTION_BUFFER_POINTER 
  GL_SELECTION_BUFFER_SIZE 
  GL_FOG 
  GL_FOG_MODE 
  GL_FOG_DENSITY 
  GL_FOG_COLOR 
  GL_FOG_INDEX 
  GL_FOG_START 
  GL_FOG_END 
  GL_LINEAR 
  GL_EXP 
  GL_EXP2 
  GL_LOGIC_OP 
  GL_INDEX_LOGIC_OP 
  GL_COLOR_LOGIC_OP 
  GL_LOGIC_OP_MODE 
  GL_CLEAR 
  GL_SET 
  GL_COPY 
  GL_COPY_INVERTED 
  GL_NOOP 
  GL_INVERT 
  GL_AND 
  GL_NAND 
  GL_OR 
  GL_NOR 
  GL_XOR 
  GL_EQUIV 
  GL_AND_REVERSE 
  GL_AND_INVERTED 
  GL_OR_REVERSE 
  GL_OR_INVERTED 
  GL_STENCIL_TEST 
  GL_STENCIL_WRITEMASK 
  GL_STENCIL_BITS 
  GL_STENCIL_FUNC 
  GL_STENCIL_VALUE_MASK 
  GL_STENCIL_REF 
  GL_STENCIL_FAIL 
  GL_STENCIL_PASS_DEPTH_PASS 
  GL_STENCIL_PASS_DEPTH_FAIL 
  GL_STENCIL_CLEAR_VALUE 
  GL_STENCIL_INDEX 
  GL_KEEP 
  GL_REPLACE 
  GL_INCR 
  GL_DECR 
  GL_NONE 
  GL_LEFT 
  GL_RIGHT 
  GL_FRONT_LEFT 
  GL_FRONT_RIGHT 
  GL_BACK_LEFT 
  GL_BACK_RIGHT 
  GL_AUX0 
  GL_AUX1 
  GL_AUX2 
  GL_AUX3 
  GL_COLOR_INDEX 
  GL_RED 
  GL_GREEN 
  GL_BLUE 
  GL_ALPHA 
  GL_LUMINANCE 
  GL_LUMINANCE_ALPHA 
  GL_ALPHA_BITS 
  GL_RED_BITS 
  GL_GREEN_BITS 
  GL_BLUE_BITS 
  GL_INDEX_BITS 
  GL_SUBPIXEL_BITS 
  GL_AUX_BUFFERS 
  GL_READ_BUFFER 
  GL_DRAW_BUFFER 
  GL_DOUBLEBUFFER 
  GL_STEREO 
  GL_BITMAP 
  GL_COLOR 
  GL_DEPTH 
  GL_STENCIL 
  GL_DITHER 
  GL_RGB 
  GL_RGBA 
  GL_MAX_LIST_NESTING 
  GL_MAX_ATTRIB_STACK_DEPTH 
  GL_MAX_MODELVIEW_STACK_DEPTH 
  GL_MAX_NAME_STACK_DEPTH 
  GL_MAX_PROJECTION_STACK_DEPTH 
  GL_MAX_TEXTURE_STACK_DEPTH 
  GL_MAX_EVAL_ORDER 
  GL_MAX_LIGHTS 
  GL_MAX_CLIP_PLANES 
  GL_MAX_TEXTURE_SIZE 
  GL_MAX_PIXEL_MAP_TABLE 
  GL_MAX_VIEWPORT_DIMS 
  GL_MAX_CLIENT_ATTRIB_STACK_DEPTH 
  GL_ATTRIB_STACK_DEPTH 
  GL_CLIENT_ATTRIB_STACK_DEPTH 
  GL_COLOR_CLEAR_VALUE 
  GL_COLOR_WRITEMASK 
  GL_CURRENT_INDEX 
  GL_CURRENT_COLOR 
  GL_CURRENT_NORMAL 
  GL_CURRENT_RASTER_COLOR 
  GL_CURRENT_RASTER_DISTANCE 
  GL_CURRENT_RASTER_INDEX 
  GL_CURRENT_RASTER_POSITION 
  GL_CURRENT_RASTER_TEXTURE_COORDS 
  GL_CURRENT_RASTER_POSITION_VALID 
  GL_CURRENT_TEXTURE_COORDS 
  GL_INDEX_CLEAR_VALUE 
  GL_INDEX_MODE 
  GL_INDEX_WRITEMASK 
  GL_MODELVIEW_MATRIX 
  GL_MODELVIEW_STACK_DEPTH 
  GL_NAME_STACK_DEPTH 
  GL_PROJECTION_MATRIX 
  GL_PROJECTION_STACK_DEPTH 
  GL_RENDER_MODE 
  GL_RGBA_MODE 
  GL_TEXTURE_MATRIX 
  GL_TEXTURE_STACK_DEPTH 
  GL_VIEWPORT 
  GL_AUTO_NORMAL 
  GL_MAP1_COLOR_4 
  GL_MAP1_GRID_DOMAIN 
  GL_MAP1_GRID_SEGMENTS 
  GL_MAP1_INDEX 
  GL_MAP1_NORMAL 
  GL_MAP1_TEXTURE_COORD_1 
  GL_MAP1_TEXTURE_COORD_2 
  GL_MAP1_TEXTURE_COORD_3 
  GL_MAP1_TEXTURE_COORD_4 
  GL_MAP1_VERTEX_3 
  GL_MAP1_VERTEX_4 
  GL_MAP2_COLOR_4 
  GL_MAP2_GRID_DOMAIN 
  GL_MAP2_GRID_SEGMENTS 
  GL_MAP2_INDEX 
  GL_MAP2_NORMAL 
  GL_MAP2_TEXTURE_COORD_1 
  GL_MAP2_TEXTURE_COORD_2 
  GL_MAP2_TEXTURE_COORD_3 
  GL_MAP2_TEXTURE_COORD_4 
  GL_MAP2_VERTEX_3 
  GL_MAP2_VERTEX_4 
  GL_COEFF 
  GL_DOMAIN 
  GL_ORDER 
  GL_FOG_HINT 
  GL_LINE_SMOOTH_HINT 
  GL_PERSPECTIVE_CORRECTION_HINT 
  GL_POINT_SMOOTH_HINT 
  GL_POLYGON_SMOOTH_HINT 
  GL_DONT_CARE 
  GL_FASTEST 
  GL_NICEST 
  GL_SCISSOR_TEST 
  GL_SCISSOR_BOX 
  GL_MAP_COLOR 
  GL_MAP_STENCIL 
  GL_INDEX_SHIFT 
  GL_INDEX_OFFSET 
  GL_RED_SCALE 
  GL_RED_BIAS 
  GL_GREEN_SCALE 
  GL_GREEN_BIAS 
  GL_BLUE_SCALE 
  GL_BLUE_BIAS 
  GL_ALPHA_SCALE 
  GL_ALPHA_BIAS 
  GL_DEPTH_SCALE 
  GL_DEPTH_BIAS 
  GL_PIXEL_MAP_S_TO_S_SIZE 
  GL_PIXEL_MAP_I_TO_I_SIZE 
  GL_PIXEL_MAP_I_TO_R_SIZE 
  GL_PIXEL_MAP_I_TO_G_SIZE 
  GL_PIXEL_MAP_I_TO_B_SIZE 
  GL_PIXEL_MAP_I_TO_A_SIZE 
  GL_PIXEL_MAP_R_TO_R_SIZE 
  GL_PIXEL_MAP_G_TO_G_SIZE 
  GL_PIXEL_MAP_B_TO_B_SIZE 
  GL_PIXEL_MAP_A_TO_A_SIZE 
  GL_PIXEL_MAP_S_TO_S 
  GL_PIXEL_MAP_I_TO_I 
  GL_PIXEL_MAP_I_TO_R 
  GL_PIXEL_MAP_I_TO_G 
  GL_PIXEL_MAP_I_TO_B 
  GL_PIXEL_MAP_I_TO_A 
  GL_PIXEL_MAP_R_TO_R 
  GL_PIXEL_MAP_G_TO_G 
  GL_PIXEL_MAP_B_TO_B 
  GL_PIXEL_MAP_A_TO_A 
  GL_PACK_ALIGNMENT 
  GL_PACK_LSB_FIRST 
  GL_PACK_ROW_LENGTH 
  GL_PACK_SKIP_PIXELS 
  GL_PACK_SKIP_ROWS 
  GL_PACK_SWAP_BYTES 
  GL_UNPACK_ALIGNMENT 
  GL_UNPACK_LSB_FIRST 
  GL_UNPACK_ROW_LENGTH 
  GL_UNPACK_SKIP_PIXELS 
  GL_UNPACK_SKIP_ROWS 
  GL_UNPACK_SWAP_BYTES 
  GL_ZOOM_X 
  GL_ZOOM_Y 
  GL_TEXTURE_ENV 
  GL_TEXTURE_ENV_MODE 
  GL_TEXTURE_1D 
  GL_TEXTURE_2D 
  GL_TEXTURE_WRAP_S 
  GL_TEXTURE_WRAP_T 
  GL_TEXTURE_MAG_FILTER 
  GL_TEXTURE_MIN_FILTER 
  GL_TEXTURE_ENV_COLOR 
  GL_TEXTURE_GEN_S 
  GL_TEXTURE_GEN_T 
  GL_TEXTURE_GEN_MODE 
  GL_TEXTURE_BORDER_COLOR 
  GL_TEXTURE_WIDTH 
  GL_TEXTURE_HEIGHT 
  GL_TEXTURE_BORDER 
  GL_TEXTURE_COMPONENTS 
  GL_TEXTURE_RED_SIZE 
  GL_TEXTURE_GREEN_SIZE 
  GL_TEXTURE_BLUE_SIZE 
  GL_TEXTURE_ALPHA_SIZE 
  GL_TEXTURE_LUMINANCE_SIZE 
  GL_TEXTURE_INTENSITY_SIZE 
  GL_NEAREST_MIPMAP_NEAREST 
  GL_NEAREST_MIPMAP_LINEAR 
  GL_LINEAR_MIPMAP_NEAREST 
  GL_LINEAR_MIPMAP_LINEAR 
  GL_OBJECT_LINEAR 
  GL_OBJECT_PLANE 
  GL_EYE_LINEAR 
  GL_EYE_PLANE 
  GL_SPHERE_MAP 
  GL_DECAL 
  GL_MODULATE 
  GL_NEAREST 
  GL_REPEAT 
  GL_CLAMP 
  GL_S 
  GL_T 
  GL_R 
  GL_Q 
  GL_TEXTURE_GEN_R 
  GL_TEXTURE_GEN_Q 
  GL_VENDOR 
  GL_RENDERER 
  GL_VERSION 
  GL_EXTENSIONS 
  GL_NO_ERROR 
  GL_INVALID_VALUE 
  GL_INVALID_ENUM 
  GL_INVALID_OPERATION 
  GL_STACK_OVERFLOW 
  GL_STACK_UNDERFLOW 
  GL_OUT_OF_MEMORY 
  GL_CURRENT_BIT 
  GL_POINT_BIT 
  GL_LINE_BIT 
  GL_POLYGON_BIT 
  GL_POLYGON_STIPPLE_BIT 
  GL_PIXEL_MODE_BIT 
  GL_LIGHTING_BIT 
  GL_FOG_BIT 
  GL_DEPTH_BUFFER_BIT 
  GL_ACCUM_BUFFER_BIT 
  GL_STENCIL_BUFFER_BIT 
  GL_VIEWPORT_BIT 
  GL_TRANSFORM_BIT 
  GL_ENABLE_BIT 
  GL_COLOR_BUFFER_BIT 
  GL_HINT_BIT 
  GL_EVAL_BIT 
  GL_LIST_BIT 
  GL_TEXTURE_BIT 
  GL_SCISSOR_BIT 
  GL_ALL_ATTRIB_BITS 
  GL_PROXY_TEXTURE_1D 
  GL_PROXY_TEXTURE_2D 
  GL_TEXTURE_PRIORITY 
  GL_TEXTURE_RESIDENT 
  GL_TEXTURE_BINDING_1D 
  GL_TEXTURE_BINDING_2D 
  GL_TEXTURE_INTERNAL_FORMAT 
  GL_ALPHA4 
  GL_ALPHA8 
  GL_ALPHA12 
  GL_ALPHA16 
  GL_LUMINANCE4 
  GL_LUMINANCE8 
  GL_LUMINANCE12 
  GL_LUMINANCE16 
  GL_LUMINANCE4_ALPHA4 
  GL_LUMINANCE6_ALPHA2 
  GL_LUMINANCE8_ALPHA8 
  GL_LUMINANCE12_ALPHA4 
  GL_LUMINANCE12_ALPHA12 
  GL_LUMINANCE16_ALPHA16 
  GL_INTENSITY 
  GL_INTENSITY4 
  GL_INTENSITY8 
  GL_INTENSITY12 
  GL_INTENSITY16 
  GL_R3_G3_B2 
  GL_RGB4 
  GL_RGB5 
  GL_RGB8 
  GL_RGB10 
  GL_RGB12 
  GL_RGB16 
  GL_RGBA2 
  GL_RGBA4 
  GL_RGB5_A1 
  GL_RGBA8 
  GL_RGB10_A2 
  GL_RGBA12 
  GL_RGBA16 
  GL_CLIENT_PIXEL_STORE_BIT 
  GL_CLIENT_VERTEX_ARRAY_BIT 
  GL_ALL_CLIENT_ATTRIB_BITS 
  GL_CLIENT_ALL_ATTRIB_BITS 
  
  GL_UNSIGNED_BYTE_3_3_2 
  GL_UNSIGNED_SHORT_4_4_4_4 
  GL_UNSIGNED_SHORT_5_5_5_1 
  GL_UNSIGNED_INT_8_8_8_8 
  GL_UNSIGNED_INT_10_10_10_2 
  GL_RESCALE_NORMAL 
  GL_TEXTURE_BINDING_3D 
  GL_PACK_SKIP_IMAGES 
  GL_PACK_IMAGE_HEIGHT 
  GL_UNPACK_SKIP_IMAGES 
  GL_UNPACK_IMAGE_HEIGHT 
  GL_TEXTURE_3D 
  GL_PROXY_TEXTURE_3D 
  GL_TEXTURE_DEPTH 
  GL_TEXTURE_WRAP_R 
  GL_MAX_3D_TEXTURE_SIZE 
  GL_UNSIGNED_BYTE_2_3_3_REV 
  GL_UNSIGNED_SHORT_5_6_5 
  GL_UNSIGNED_SHORT_5_6_5_REV 
  GL_UNSIGNED_SHORT_4_4_4_4_REV 
  GL_UNSIGNED_SHORT_1_5_5_5_REV 
  GL_UNSIGNED_INT_8_8_8_8_REV 
  GL_UNSIGNED_INT_2_10_10_10_REV 
  GL_BGR 
  GL_BGRA 
  GL_MAX_ELEMENTS_VERTICES 
  GL_MAX_ELEMENTS_INDICES 
  GL_CLAMP_TO_EDGE 
  GL_TEXTURE_MIN_LOD 
  GL_TEXTURE_MAX_LOD 
  GL_TEXTURE_BASE_LEVEL 
  GL_TEXTURE_MAX_LEVEL 
  GL_LIGHT_MODEL_COLOR_CONTROL 
  GL_SINGLE_COLOR 
  GL_SEPARATE_SPECULAR_COLOR 
  GL_SMOOTH_POINT_SIZE_RANGE 
  GL_SMOOTH_POINT_SIZE_GRANULARITY 
  GL_SMOOTH_LINE_WIDTH_RANGE 
  GL_SMOOTH_LINE_WIDTH_GRANULARITY 
  GL_ALIASED_POINT_SIZE_RANGE 
  GL_ALIASED_LINE_WIDTH_RANGE 
  
  GL_CONSTANT_COLOR 
  GL_ONE_MINUS_CONSTANT_COLOR 
  GL_CONSTANT_ALPHA 
  GL_ONE_MINUS_CONSTANT_ALPHA 
  GL_BLEND_COLOR 
  GL_FUNC_ADD 
  GL_MIN 
  GL_MAX 
  GL_BLEND_EQUATION 
  GL_FUNC_SUBTRACT 
  GL_FUNC_REVERSE_SUBTRACT 
  GL_CONVOLUTION_1D 
  GL_CONVOLUTION_2D 
  GL_SEPARABLE_2D 
  GL_CONVOLUTION_BORDER_MODE 
  GL_CONVOLUTION_FILTER_SCALE 
  GL_CONVOLUTION_FILTER_BIAS 
  GL_REDUCE 
  GL_CONVOLUTION_FORMAT 
  GL_CONVOLUTION_WIDTH 
  GL_CONVOLUTION_HEIGHT 
  GL_MAX_CONVOLUTION_WIDTH 
  GL_MAX_CONVOLUTION_HEIGHT 
  GL_POST_CONVOLUTION_RED_SCALE 
  GL_POST_CONVOLUTION_GREEN_SCALE 
  GL_POST_CONVOLUTION_BLUE_SCALE 
  GL_POST_CONVOLUTION_ALPHA_SCALE 
  GL_POST_CONVOLUTION_RED_BIAS 
  GL_POST_CONVOLUTION_GREEN_BIAS 
  GL_POST_CONVOLUTION_BLUE_BIAS 
  GL_POST_CONVOLUTION_ALPHA_BIAS 
  GL_HISTOGRAM 
  GL_PROXY_HISTOGRAM 
  GL_HISTOGRAM_WIDTH 
  GL_HISTOGRAM_FORMAT 
  GL_HISTOGRAM_RED_SIZE 
  GL_HISTOGRAM_GREEN_SIZE 
  GL_HISTOGRAM_BLUE_SIZE 
  GL_HISTOGRAM_ALPHA_SIZE 
  GL_HISTOGRAM_LUMINANCE_SIZE 
  GL_HISTOGRAM_SINK 
  GL_MINMAX 
  GL_MINMAX_FORMAT 
  GL_MINMAX_SINK 
  GL_TABLE_TOO_LARGE 
  GL_COLOR_MATRIX 
  GL_COLOR_MATRIX_STACK_DEPTH 
  GL_MAX_COLOR_MATRIX_STACK_DEPTH 
  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_COLOR_MATRIX_RED_BIAS 
  GL_POST_COLOR_MATRIX_GREEN_BIAS 
  GL_POST_COLOR_MATRIX_BLUE_BIAS 
  GL_POST_COLOR_MATRIX_ALPHA_BIAS 
  GL_COLOR_TABLE 
  GL_POST_CONVOLUTION_COLOR_TABLE 
  GL_POST_COLOR_MATRIX_COLOR_TABLE 
  GL_PROXY_COLOR_TABLE 
  GL_PROXY_POST_CONVOLUTION_COLOR_TABLE 
  GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE 
  GL_COLOR_TABLE_SCALE 
  GL_COLOR_TABLE_BIAS 
  GL_COLOR_TABLE_FORMAT 
  GL_COLOR_TABLE_WIDTH 
  GL_COLOR_TABLE_RED_SIZE 
  GL_COLOR_TABLE_GREEN_SIZE 
  GL_COLOR_TABLE_BLUE_SIZE 
  GL_COLOR_TABLE_ALPHA_SIZE 
  GL_COLOR_TABLE_LUMINANCE_SIZE 
  GL_COLOR_TABLE_INTENSITY_SIZE 
  GL_CONSTANT_BORDER 
  GL_REPLICATE_BORDER 
  GL_CONVOLUTION_BORDER_COLOR 

 GL_TEXTURE0 
 GL_TEXTURE1 
 GL_TEXTURE2 
 GL_TEXTURE3 
 GL_TEXTURE4 
 GL_TEXTURE5 
 GL_TEXTURE6 
 GL_TEXTURE7 
 GL_TEXTURE8 
 GL_TEXTURE9 
 GL_TEXTURE10 
 GL_TEXTURE11 
 GL_TEXTURE12 
 GL_TEXTURE13 
 GL_TEXTURE14 
 GL_TEXTURE15 
 GL_TEXTURE16 
 GL_TEXTURE17 
 GL_TEXTURE18 
 GL_TEXTURE19 
 GL_TEXTURE20 
 GL_TEXTURE21 
 GL_TEXTURE22 
 GL_TEXTURE23 
 GL_TEXTURE24 
 GL_TEXTURE25 
 GL_TEXTURE26 
 GL_TEXTURE27 
 GL_TEXTURE28 
 GL_TEXTURE29 
 GL_TEXTURE30 
 GL_TEXTURE31 
 GL_ACTIVE_TEXTURE 
 GL_CLIENT_ACTIVE_TEXTURE 
 GL_MAX_TEXTURE_UNITS 
 GL_TRANSPOSE_MODELVIEW_MATRIX 
 GL_TRANSPOSE_PROJECTION_MATRIX 
 GL_TRANSPOSE_TEXTURE_MATRIX 
 GL_TRANSPOSE_COLOR_MATRIX 
 GL_MULTISAMPLE 
 GL_SAMPLE_ALPHA_TO_COVERAGE 
 GL_SAMPLE_ALPHA_TO_ONE 
 GL_SAMPLE_COVERAGE 
 GL_SAMPLE_BUFFERS 
 GL_SAMPLES 
 GL_SAMPLE_COVERAGE_VALUE 
 GL_SAMPLE_COVERAGE_INVERT 
 GL_MULTISAMPLE_BIT 
 GL_NORMAL_MAP 
 GL_REFLECTION_MAP 
 GL_TEXTURE_CUBE_MAP 
 GL_TEXTURE_BINDING_CUBE_MAP 
 GL_TEXTURE_CUBE_MAP_POSITIVE_X 
 GL_TEXTURE_CUBE_MAP_NEGATIVE_X 
 GL_TEXTURE_CUBE_MAP_POSITIVE_Y 
 GL_TEXTURE_CUBE_MAP_NEGATIVE_Y 
 GL_TEXTURE_CUBE_MAP_POSITIVE_Z 
 GL_TEXTURE_CUBE_MAP_NEGATIVE_Z 
 GL_PROXY_TEXTURE_CUBE_MAP 
 GL_MAX_CUBE_MAP_TEXTURE_SIZE 
 GL_COMPRESSED_ALPHA 
 GL_COMPRESSED_LUMINANCE 
 GL_COMPRESSED_LUMINANCE_ALPHA 
 GL_COMPRESSED_INTENSITY 
 GL_COMPRESSED_RGB 
 GL_COMPRESSED_RGBA 
 GL_TEXTURE_COMPRESSION_HINT 
 GL_TEXTURE_COMPRESSED_IMAGE_SIZE 
 GL_TEXTURE_COMPRESSED 
 GL_NUM_COMPRESSED_TEXTURE_FORMATS 
 GL_COMPRESSED_TEXTURE_FORMATS 
 GL_CLAMP_TO_BORDER 
 GL_COMBINE 
 GL_COMBINE_RGB 
 GL_COMBINE_ALPHA 
 GL_SOURCE0_RGB 
 GL_SOURCE1_RGB 
 GL_SOURCE2_RGB 
 GL_SOURCE0_ALPHA 
 GL_SOURCE1_ALPHA 
 GL_SOURCE2_ALPHA 
 GL_OPERAND0_RGB 
 GL_OPERAND1_RGB 
 GL_OPERAND2_RGB 
 GL_OPERAND0_ALPHA 
 GL_OPERAND1_ALPHA 
 GL_OPERAND2_ALPHA 
 GL_RGB_SCALE 
 GL_ADD_SIGNED 
 GL_INTERPOLATE 
 GL_SUBTRACT 
 GL_CONSTANT 
 GL_PRIMARY_COLOR 
 GL_PREVIOUS 
 GL_DOT3_RGB 
 GL_DOT3_RGBA 
  
 GL_BLEND_DST_RGB 
 GL_BLEND_SRC_RGB 
 GL_BLEND_DST_ALPHA 
 GL_BLEND_SRC_ALPHA 
 GL_POINT_SIZE_MIN 
 GL_POINT_SIZE_MAX 
 GL_POINT_FADE_THRESHOLD_SIZE 
 GL_POINT_DISTANCE_ATTENUATION 
 GL_GENERATE_MIPMAP 
 GL_GENERATE_MIPMAP_HINT 
 GL_DEPTH_COMPONENT16 
 GL_DEPTH_COMPONENT24 
 GL_DEPTH_COMPONENT32 
 GL_MIRRORED_REPEAT 
 GL_FOG_COORDINATE_SOURCE 
 GL_FOG_COORDINATE 
 GL_FRAGMENT_DEPTH 
 GL_CURRENT_FOG_COORDINATE 
 GL_FOG_COORDINATE_ARRAY_TYPE 
 GL_FOG_COORDINATE_ARRAY_STRIDE 
 GL_FOG_COORDINATE_ARRAY_POINTER 
 GL_FOG_COORDINATE_ARRAY 
 GL_COLOR_SUM 
 GL_CURRENT_SECONDARY_COLOR 
 GL_SECONDARY_COLOR_ARRAY_SIZE 
 GL_SECONDARY_COLOR_ARRAY_TYPE 
 GL_SECONDARY_COLOR_ARRAY_STRIDE 
 GL_SECONDARY_COLOR_ARRAY_POINTER 
 GL_SECONDARY_COLOR_ARRAY 
 GL_MAX_TEXTURE_LOD_BIAS 
 GL_TEXTURE_FILTER_CONTROL 
 GL_TEXTURE_LOD_BIAS 
 GL_INCR_WRAP 
 GL_DECR_WRAP 
 GL_TEXTURE_DEPTH_SIZE 
 GL_DEPTH_TEXTURE_MODE 
 GL_TEXTURE_COMPARE_MODE 
 GL_TEXTURE_COMPARE_FUNC 
 GL_COMPARE_R_TO_TEXTURE 
  
  GL_BUFFER_SIZE 
  GL_BUFFER_USAGE 
  GL_QUERY_COUNTER_BITS 
  GL_CURRENT_QUERY 
  GL_QUERY_RESULT 
  GL_QUERY_RESULT_AVAILABLE 
  GL_ARRAY_BUFFER 
  GL_ELEMENT_ARRAY_BUFFER 
  GL_ARRAY_BUFFER_BINDING 
  GL_ELEMENT_ARRAY_BUFFER_BINDING 
  GL_VERTEX_ARRAY_BUFFER_BINDING 
  GL_NORMAL_ARRAY_BUFFER_BINDING 
  GL_COLOR_ARRAY_BUFFER_BINDING 
  GL_INDEX_ARRAY_BUFFER_BINDING 
  GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING 
  GL_EDGE_FLAG_ARRAY_BUFFER_BINDING 
  GL_SECONDARY_COLOR_ARRAY_BUFFER_BINDING 
  GL_FOG_COORDINATE_ARRAY_BUFFER_BINDING 
  GL_WEIGHT_ARRAY_BUFFER_BINDING 
  GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 
  GL_READ_ONLY 
  GL_WRITE_ONLY 
  GL_READ_WRITE 
  GL_BUFFER_ACCESS 
  GL_BUFFER_MAPPED 
  GL_BUFFER_MAP_POINTER 
  GL_STREAM_DRAW 
  GL_STREAM_READ 
  GL_STREAM_COPY 
  GL_STATIC_DRAW 
  GL_STATIC_READ 
  GL_STATIC_COPY 
  GL_DYNAMIC_DRAW 
  GL_DYNAMIC_READ 
  GL_DYNAMIC_COPY 
  GL_SAMPLES_PASSED 
  GL_FOG_COORD_SRC
  GL_FOG_COORD
  GL_CURRENT_FOG_COORD
  GL_FOG_COORD_ARRAY_TYPE
  GL_FOG_COORD_ARRAY_STRIDE
  GL_FOG_COORD_ARRAY_POINTER
  GL_FOG_COORD_ARRAY
  GL_FOG_COORD_ARRAY_BUFFER_BINDING
  GL_SRC0_RGB
  GL_SRC1_RGB
  GL_SRC2_RGB
  GL_SRC0_ALPHA
  GL_SRC1_ALPHA
  GL_SRC2_ALPHA

  GLU_FALSE
  GLU_TRUE
  GLU_VERSION
  GLU_EXTENSIONS
  GLU_INVALID_ENUM
  GLU_INVALID_VALUE
  GLU_OUT_OF_MEMORY
  GLU_INVALID_OPERATION
  GLU_OUTLINE_POLYGON
  GLU_OUTLINE_PATCH
  GLU_NURBS_ERROR
  GLU_ERROR
  GLU_NURBS_BEGIN
  GLU_NURBS_BEGIN_EXT
  GLU_NURBS_VERTEX
  GLU_NURBS_VERTEX_EXT
  GLU_NURBS_NORMAL
  GLU_NURBS_NORMAL_EXT
  GLU_NURBS_COLOR
  GLU_NURBS_COLOR_EXT
  GLU_NURBS_TEXTURE_COORD
  GLU_NURBS_TEX_COORD_EXT
  GLU_NURBS_END
  GLU_NURBS_END_EXT
  GLU_NURBS_BEGIN_DATA
  GLU_NURBS_BEGIN_DATA_EXT
  GLU_NURBS_VERTEX_DATA
  GLU_NURBS_VERTEX_DATA_EXT
  GLU_NURBS_NORMAL_DATA
  GLU_NURBS_NORMAL_DATA_EXT
  GLU_NURBS_COLOR_DATA
  GLU_NURBS_COLOR_DATA_EXT
  GLU_NURBS_TEXTURE_COORD_DATA
  GLU_NURBS_TEX_COORD_DATA_EXT
  GLU_NURBS_END_DATA
  GLU_NURBS_END_DATA_EXT
  GLU_NURBS_ERROR1
  GLU_NURBS_ERROR2
  GLU_NURBS_ERROR3
  GLU_NURBS_ERROR4
  GLU_NURBS_ERROR5
  GLU_NURBS_ERROR6
  GLU_NURBS_ERROR7
  GLU_NURBS_ERROR8
  GLU_NURBS_ERROR9
  GLU_NURBS_ERROR10
  GLU_NURBS_ERROR11
  GLU_NURBS_ERROR12
  GLU_NURBS_ERROR13
  GLU_NURBS_ERROR14
  GLU_NURBS_ERROR15
  GLU_NURBS_ERROR16
  GLU_NURBS_ERROR17
  GLU_NURBS_ERROR18
  GLU_NURBS_ERROR19
  GLU_NURBS_ERROR20
  GLU_NURBS_ERROR21
  GLU_NURBS_ERROR22
  GLU_NURBS_ERROR23
  GLU_NURBS_ERROR24
  GLU_NURBS_ERROR25
  GLU_NURBS_ERROR26
  GLU_NURBS_ERROR27
  GLU_NURBS_ERROR28
  GLU_NURBS_ERROR29
  GLU_NURBS_ERROR30
  GLU_NURBS_ERROR31
  GLU_NURBS_ERROR32
  GLU_NURBS_ERROR33
  GLU_NURBS_ERROR34
  GLU_NURBS_ERROR35
  GLU_NURBS_ERROR36
  GLU_NURBS_ERROR37
  GLU_AUTO_LOAD_MATRIX
  GLU_CULLING
  GLU_SAMPLING_TOLERANCE
  GLU_DISPLAY_MODE
  GLU_PARAMETRIC_TOLERANCE
  GLU_SAMPLING_METHOD
  GLU_U_STEP
  GLU_V_STEP
  GLU_NURBS_MODE
  GLU_NURBS_MODE_EXT
  GLU_NURBS_TESSELLATOR
  GLU_NURBS_TESSELLATOR_EXT
  GLU_NURBS_RENDERER
  GLU_NURBS_RENDERER_EXT
  GLU_OBJECT_PARAMETRIC_ERROR
  GLU_OBJECT_PARAMETRIC_ERROR_EXT
  GLU_OBJECT_PATH_LENGTH
  GLU_OBJECT_PATH_LENGTH_EXT
  GLU_PATH_LENGTH
  GLU_PARAMETRIC_ERROR
  GLU_DOMAIN_DISTANCE
  GLU_MAP1_TRIM_2
  GLU_MAP1_TRIM_3
  GLU_POINT
  GLU_LINE
  GLU_FILL
  GLU_SILHOUETTE
  GLU_SMOOTH
  GLU_FLAT
  GLU_NONE
  GLU_OUTSIDE
  GLU_INSIDE
  GLU_TESS_BEGIN
  GLU_BEGIN
  GLU_TESS_VERTEX
  GLU_VERTEX
  GLU_TESS_END
  GLU_END
  GLU_TESS_ERROR
  GLU_TESS_EDGE_FLAG
  GLU_EDGE_FLAG
  GLU_TESS_COMBINE
  GLU_TESS_BEGIN_DATA
  GLU_TESS_VERTEX_DATA
  GLU_TESS_END_DATA
  GLU_TESS_ERROR_DATA
  GLU_TESS_EDGE_FLAG_DATA
  GLU_TESS_COMBINE_DATA
  GLU_CW
  GLU_CCW
  GLU_INTERIOR
  GLU_EXTERIOR
  GLU_UNKNOWN
  GLU_TESS_WINDING_RULE
  GLU_TESS_BOUNDARY_ONLY
  GLU_TESS_TOLERANCE
  GLU_TESS_ERROR1
  GLU_TESS_ERROR2
  GLU_TESS_ERROR3
  GLU_TESS_ERROR4
  GLU_TESS_ERROR5
  GLU_TESS_ERROR6
  GLU_TESS_ERROR7
  GLU_TESS_ERROR8
  GLU_TESS_MISSING_BEGIN_POLYGON
  GLU_TESS_MISSING_BEGIN_CONTOUR
  GLU_TESS_MISSING_END_POLYGON
  GLU_TESS_MISSING_END_CONTOUR
  GLU_TESS_COORD_TOO_LARGE
  GLU_TESS_NEED_COMBINE_CALLBACK
  GLU_TESS_WINDING_ODD
  GLU_TESS_WINDING_NONZERO
  GLU_TESS_WINDING_POSITIVE
  GLU_TESS_WINDING_NEGATIVE
  GLU_TESS_WINDING_ABS_GEQ_TWO
  [GLU_TESS_MAX_COORD real?]
)]{
All OpenGL-defined constants.}

@defproc[(feedback-buffer->gl-float-vector [buf feedback-buffer-object?])
         gl-float-vector?]{

Converts a result from @racket[glFeedbackBuffer] to a vector.}

@defproc[(select-buffer->gl-uint-vector [buf select-buffer-object?])
         gl-uint-vector?]{

Converts a result from @racket[glSelectBuffer] to a vector.}
