C SPECIFICATION

       void GLAPIENTRY glBitmap( GLsizei width,
                                 GLsizei heigh )

PARAMETERS

       width, heigh Specify the pixel width and height of the bitmap image.

       _param3, _param4
                    Specify  the  location  of the origin in the bitmap image.
                    The origin is measured from the lower left corner  of  the
                    bitmap, with right and up being the positive axes.

       _param5, _param6
                    Specify  the  x  and  y offsets to be added to the current
                    raster position after the bitmap is drawn.

       _param7      Specifies the address of the bitmap image.

DESCRIPTION

       A bitmap is a binary image.  When drawn, the bitmap is positioned rela-
       tive  to  the  current  raster position, and frame buffer pixels corre-
       sponding to 1's in the bitmap are  written  using  the  current  raster
       color or index.  Frame buffer pixels corresponding to 0's in the bitmap
       are not modified.

       glBitmap takes seven arguments.  The first pair specifies the width and
       height  of the bitmap image.  The second pair specifies the location of
       the bitmap origin relative to the  lower  left  corner  of  the  bitmap
       image.   The  third  pair  of arguments specifies x and y offsets to be
       added to the current raster position after the bitmap has  been  drawn.
       The final argument is a pointer to the bitmap image itself.

       The  bitmap  image  is interpreted like image data for the glDrawPixels
       command, with width and heigh corresponding to  the  width  and  height
       arguments  of  that  command, and with type set to GL_BITMAP and format
       set to GL_COLOR_INDEX.  Modes specified using glPixelStore  affect  the
       interpretation   of   bitmap   image   data;   modes   specified  using
       glPixelTransfer do not.

       If the current raster position is invalid, glBitmap is ignored.  Other-
       wise,  the  lower  left corner of the bitmap image is positioned at the
       window coordinates

                                     xw=?xr-xo?

                                     yw=?yr-yo?

       where (xr,yr) is the raster position and (xo,yo) is the bitmap  origin.
       Fragments  are then generated for each pixel corresponding to a 1 (one)
       in the bitmap image.  These fragments are generated using  the  current
       the  _param7  parameter and with _param5 and _param6 set to the offsets
       of the new raster position. This technique is useful  when  panning  an
       image around the viewport.

ERRORS

       GL_INVALID_VALUE is generated if width or heigh is negative.

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

ASSOCIATED GETS

       glGet with argument GL_CURRENT_RASTER_POSITION
       glGet with argument GL_CURRENT_RASTER_COLOR
       glGet with argument GL_CURRENT_RASTER_DISTANCE
       glGet with argument GL_CURRENT_RASTER_INDEX
       glGet with argument GL_CURRENT_RASTER_TEXTURE_COORDS
       glGet with argument GL_CURRENT_RASTER_POSITION_VALID

SEE ALSO

       glDrawPixels, glPixelStore, glPixelTransfer, glRasterPos




                                                                  GLBITMAP(3G)