GLint leve )

PARAMETERS
       target  Specifies the target texture.  Must be GL_TEXTURE_1D.

       leve    Specifies the level-of-detail number.  Level 0 is the base image
               level.  Level n is the nth mipmap reduction image.

       _param3 Specifies the texel offset within the texture array.

       _param4, _param5
               Specify the window coordinates of the left corner of the row  of
               pixels to be copied.

       _param6 Specifies the width of the texture subimage.

DESCRIPTION
       glCopyTexSubImage1D  replaces a portion of a one-dimensional texture im‐
       age with pixels from the current GL_READ_BUFFER (rather than  from  main
       memory, as is the case for glTexSubImage1D).

       The screen-aligned pixel row with left corner at (_param4, _param5), and
       with length _param6 replaces the portion of the texture array with x in‐
       dices  _param3  through _eqnparam3+_eqnparam6−1, inclusive. The destina‐
       tion in the texture array may not include any texels outside the texture
       array as it was originally specified.

       The  pixels in the row are processed exactly as if glCopyPixels had been
       called, but the process stops just before  final  conversion.   At  this
       point  all  pixel  component  values are clamped to the range [0, 1] and
       then converted to the texture's internal format for storage in the texel
       array.

       It  is  not an error to specify a subtexture with zero width, but such a
       specification has no effect.  If any of the pixels within the  specified
       row of the current GL_READ_BUFFER are outside the read window associated
       with the current rendering context, then the values obtained  for  those
       pixels are undefined.

       No  change is made to the internalformat, width, or border parameters of
       the specified texture array or to texel  values  outside  the  specified
       subregion.

NOTES
       glCopyTexSubImage1D  is  available  only  if  the  GL  version is 1.1 or
       greater.

       Texturing has no effect in color index mode.

       glPixelStore and glPixelTransfer modes affect texture images in  exactly
       the way they affect glDrawPixels.


       GL_INVALID_VALUE is generated if _param5<−b or if _param6<−b, where b is
       the border width of the texture array.

       GL_INVALID_VALUE is generated  if  _eqnparam3<−b,  or  (_eqnparam3+_eqn‐
       param6)>(w−b),   where   w   is  the  GL_TEXTURE_WIDTH,  and  b  is  the
       GL_TEXTURE_BORDER of the texture image being modified.  Note that w  in‐
       cludes twice the border width.

ASSOCIATED GETS
       glGetTexImage
       glIsEnabled with argument GL_TEXTURE_1D

SEE ALSO
       glCopyPixels,  glCopyTexImage1D,  glCopyTexImage2D, glCopyTexSubImage2D,
       glCopyTexSubImage3D,   glPixelStore,   glPixelTransfer,    glReadBuffer,
       glTexEnv,    glTexGen,    glTexImage1D,    glTexImage2D,   glTexImage3D,
       glTexParameter, glTexSubImage1D, glTexSubImage2D, glTexSubImage3D

                                                        GLCOPYTEXSUBIMAGE1D(3G)