# HDF Reference Manual

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> ### DFR8 - Single-file 8-Bit Raster Image Interface

> | DFR8addimage/d8aimg | Appends the RIS8 for the image to the file.
> | DFR8getdims/d8gdims | Opens the file, finds the next image, retrieves the dimensions of the image, and determines whether there is a palette associated with the image.
> | DFR8getimage/d8gimg | To retrieve the image and its palette, if it is present, and store them in the specified arrays.
> | DFR8getpalref | Retrieves the reference number of the palette associated with the last image accessed.
> | DFR8lastref/d8lref | Retrieves the last reference number written to or read from an RIS8.
> | DFR8nimages/d8nims | Retrieves the number of 8-bit raster images stored in the specified file.
> | DFR8putimage/d8pimg | Writes the RIS8 for the image as the first image in the file, overwriting any information previously in the file.
> | DFR8readref/d8rref | Specifies the reference number of the image to be read when DFR8getimage is next called.
> | DFR8restart/d8first | Causes the next get command to read from the first raster image set in the file.
> | DFR8setcompress/d8scomp | Sets the compression type to be used when writing the next 8-bit raster image.
> | d8scomp | Fortran-specific routine that sets the parameters needed for the JPEG algorithm.
> | d8sjpeg | Fortran-specific routine that sets the parameters needed for the JPEG algorithm.
> | DFR8setpalette/d8spal | Indicate which palette, if any, is to be used for subsequent image sets.
> | DFR8writeref/d8wref | Specifies the reference number of the image to be written when DFR8addimage or DFR8putimage is next called.

> ###

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