Purpose To cause the next get to read from the first RIS8 in the file, rather than the RIS8 following the one that was most recently read. Purpose Set the type of compression to use when writing the next 8-bit raster image. This routine provides a method for compressing the next raster image written. The ratio of size to perceived image quality varies from image to image, some experimentation may be required to determine an acceptable quality factor for a given application. Purpose Indicate which palette, if any, is to be used for subsequent image sets.
Description Sets the default palette to be used for subsequent images.
The specified palette continues as the default palette until it is changed by a new call to DFR8setpalette . To specify the reference number of the image to be written when DFR8addimage or DFR8putimage is next called. Description DFR8writeref assigns the specified reference number to the next image written to file. It is unlikely that you will need this routine, but if you do, use it with caution. In addition, using an existing reference number will overwrite the existing 8-bit raster image data.