PARAMETERS
       targe  Must be GL_CONVOLUTION_1D.

       _param2
              The internal format of the convolution filter kernel.  The allow‐
              able  values  are  GL_ALPHA,  GL_LUMINANCE,   GL_LUMINANCE_ALPHA,
              GL_INTENSITY, GL_RGB, and GL_RGBA.

       _param3
              The width of the pixel array referenced by _param6.

       _param4
              The  format  of  the pixel data in _param6.  The allowable values
              are  GL_ALPHA,  GL_ALPHA4,  GL_ALPHA8,  GL_ALPHA12,   GL_ALPHA16,
              GL_LUMINANCE,   GL_LUMINANCE4,   GL_LUMINANCE8,   GL_LUMINANCE12,
              GL_LUMINANCE16,     GL_LUMINANCE_ALPHA,     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_RGB,  GL_RGB4, GL_RGB5, GL_RGB8, GL_RGB10, GL_RGB12, GL_RGB16,
              GL_RGBA, GL_RGBA2, GL_RGBA4, GL_RGB5_A1,  GL_RGBA8,  GL_RGB10_A2,
              GL_RGBA12, or GL_RGBA16.

       _param5
              The  type  of  the  pixel  data  in  _param6.  Symbolic constants
              GL_UNSIGNED_BYTE,    GL_BYTE,    GL_BITMAP,    GL_UNSIGNED_SHORT,
              GL_SHORT,        GL_UNSIGNED_INT,        GL_INT,        GL_FLOAT,
              GL_UNSIGNED_BYTE_3_3_2,               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,         GL_UNSIGNED_SHORT_4_4_4_4_REV,
              GL_UNSIGNED_SHORT_5_5_5_1,         GL_UNSIGNED_SHORT_1_5_5_5_REV,
              GL_UNSIGNED_INT_8_8_8_8,             GL_UNSIGNED_INT_8_8_8_8_REV,
              GL_UNSIGNED_INT_10_10_10_2,   and  GL_UNSIGNED_INT_2_10_10_10_REV
              are accepted.

       _param6
              Pointer to a one-dimensional array of pixel  data  that  is  pro‐
              cessed to build the convolution filter kernel.

DESCRIPTION
       glConvolutionFilter1D builds a one-dimensional convolution filter kernel
       from an array of pixels.

       The pixel array specified by _param3, _param4, _param5, and  _param6  is
       extracted from memory and processed just as if glDrawPixels were called,
       but processing stops after the final expansion to RGBA is completed.

       The R, G, B, and A components of each pixel are next scaled by the  four
       1D  GL_CONVOLUTION_FILTER_SCALE  parameters  and  biased  by the four 1D
       GL_CONVOLUTION_FILTER_BIAS parameters.  (The scale and  bias  parameters
       ────────────────────────────────────────────────────────────────────────
       GL_ALPHA                                    A
       GL_LUMINANCE                                R
       GL_LUMINANCE_ALPHA                  A       R
       GL_INTENSITY                                                      R
       GL_RGB                R      G      B
       GL_RGBA               R      G      B       A
       ────────────────────────────────────────────────────────────────────────

       The  red,  green, blue, alpha, luminance, and/or intensity components of
       the resulting pixels are stored in floating-point  rather  than  integer
       format.   They  form  a one-dimensional filter kernel image indexed with
       coordinate i such that i starts at 0 and increases from left  to  right.
       Kernel location i is derived from the ith pixel, counting from 0.

       Note  that  after a convolution is performed, the resulting color compo‐
       nents are also scaled by their corresponding GL_POST_CONVOLUTION_c_SCALE
       parameters  and biased by their corresponding GL_POST_CONVOLUTION_c_BIAS
       parameters (where c takes on the values RED, GREEN,  BLUE,  and  ALPHA).
       These parameters are set by glPixelTransfer.

NOTES
       glConvolutionFilter1D is present only if GL_ARB_imaging is returned when
       glGetString is called with an argument of GL_EXTENSIONS.

ERRORS
       GL_INVALID_ENUM is generated if targe is not GL_CONVOLUTION_1D.

       GL_INVALID_ENUM is generated if _param2 is not one of the allowable val‐
       ues.

       GL_INVALID_VALUE  is  generated  if _param3 is less than zero or greater
       than the maximum supported  value.   This  value  may  be  queried  with
       glGetConvolutionParameter   using   target  GL_CONVOLUTION_1D  and  name
       GL_MAX_CONVOLUTION_WIDTH.

       GL_INVALID_ENUM is generated if _param4 is not one of the allowable val‐
       ues.

       GL_INVALID_ENUM is generated if _param5 is not one of the allowable val‐
       ues.

       GL_INVALID_OPERATION is generated if glConvolutionFilter1D  is  executed
       between  the  execution  of  glBegin  and the corresponding execution of
       glEnd.

       GL_INVALID_OPERATION   is   generated   if    _param4    is    one    of
       GL_UNSIGNED_BYTE_3_3_2,                      GL_UNSIGNED_BYTE_2_3_3_REV,
       GL_UNSIGNED_SHORT_5_6_5, or GL_UNSIGNED_SHORT_5_6_5_REV and  _param5  is
       not GL_RGB.

       GL_INVALID_OPERATION    is    generated    if    _param4   is   one   of