Version 4.0 provides significantly functional improvements over version 3.2 as a result of user feedback (see the TIFF256 Revision Comparison Table).

Added TIFF File Compression . . .

Now you can take advantage of Compressed TIFF file technology for both reading in and writing out TIFF files.

Added TIFF File Sub Image Extraction capability . . .

You can read in small portions of a larger TIFF image. This is especially handy for a single TIFF file which is a mosaic of ICONS (any GUI writers out there?).

Added TRUE_COLOR_MODE 3 . . .

If you need to get your hands on the 24 bit pixel values of a true color TIFF, set true color mode = 3 and call 'tf_load_image' or 'tf_load_subimage'.

New routines . . .

tf_set_compression - Turns on compression for writing out TIFF files.

tf_get_compression - Returns compression flag.

tf_display_subimage - Display a sub region of a TIFF file to the screen.

tf_load_subimage - Load a sub region of a TIFF file into an image buffer.

tf_scan_file - One command, replaces 5 calls to set up TIFF reading.

tf_decode_scan_error - Handy error message printer for 'tf_scan_file' status.

The following table shows the evolution of the TIFF256 Graphics Library features as the library progressed from Revision 1.0 to the current Revision 4.0. (An asteriks (*) means the function is supported for that revision.)

                        TIFF256 Revision Comparison Table

                 Features                                          V1 V2 V3 V4
------------------------------------------------------------------------------
Read and Write Compressed TIFF files                                         *
Extract Sub-Image from larger TIFF file (ICONs ...)                          *
Preserve 24 bit pixel information when loading to Buffer Memory              *
Optimal Palette Image Conversion from 16M to 256 Colors                   *  *
Dithered Color Image Conversion from 16M to 256 colors                    *  *
Clipping of Displayed Images to Programmable Window                       *  *
Load Image Directly to Buffer Memory                                      *  *
Save Buffer Memory to TIFF file (Great for image processing)              *  *
Ability to Save displayed image as a TIFF file                         *  *  *
3/3/2 RGB Image Conversion from 16M to 256 colors                   *  *  *  *
Automatic access to Primary Colors in Color Palette                 *  *  *  *
Easy access to Detailed Image Parameters for any TIFF file          *  *  *  *
Supports Borland and Microsoft Compilers                            *  *  *  *
Supports Multiple Image TIFF files                                  *  *  *  *
True Color TIFF support                                             *  *  *  *
Color Palette TIFF support                                          *  *  *  *
Gray Scale TIFF support                                             *  *  *  *
Bilevel TIFF support                                                *  *  *  *