ImageGear Professional for Unix
EPS

Full Name Encapsulated PostScript File
Format ID IG_FORMAT_EPS = 10
File Extension(s) *.eps (may or may not contain preview image), *.epi (contains preview image), *epsf
Data Type Raster image
Data Encoding Binary
Color Profile Support No
ImageGear Multipage Support No
ImageGear Alpha Channel Support No
ImageGear Platforms Support WIN32, WIN64, Unix (full support with ImageGear PDF component only), Unix64, MAC, .NET

ImageGear Supported Versions:

ImageGear Supported Features:

ImageGear Read Support:

ImageGear Write Support:

ImageGear Filter Control Parameters:

Filter Control Parameter Type Default Value Available Values Description
SAVE_PREVIEW AT_BOOL FALSE TRUE, FALSE If TRUE then EPS preview will be saved
START DWORD 0 Position of start.
FITTING_METHOD UINT IG_EPS_FIT_ACTUAL IG_EPS_FIT_PAGE, IG_EPS_FIT_ACTUAL, IG_EPS_FIT_SET Fitting method, see IG_EPS_FIT_... constants
PIXEL_TO_PIXEL AT_BOOL FALSE TRUE, FALSE
PAGE_WIDTH AT_DIMENSION 8500 Page width (100ths of an inch)
PAGE_HEIGHT AT_DIMENSION 11000 Page height (100ths of an inch)
MARGINS AT_RECT {250, 250, 250, 250} Margins (100ths of an inch)
X_DPI UINT 300 X resolution
Y_DPI UINT 300 Y resolution
TEXT_ENCODING UINT IG_PDF_TEXTENC_ASCII_HEX IG_PDF_TEXTENC_NONE, IG_PDF_TEXTENC_ASCII_85, IG_PDF_TEXTENC_ASCII_HEX Text encoding method, see IG_PDF_TEXTENC_ constants

Comments:

"PostScript" refers to a widely-supported general-purpose computer language that encodes text and graphics files for sharing with the many different hardware devices that support it. The full name for this language is "PostScript Page Description Language" (PDL).

An Encapsulated PostScript file stores (encapsulates) graphical or photographic images from a larger PostScript file. ImageGear currently supports the reading of EPS image of any bit depth as long as the preview image is TIF, uncompressed. ImageGear currently supports the writing of monochrome (1-bit), grayscale (8-bit gray level), and color RGB (24-bit) EPS images only.

The EPS file format begins with a PostScript language header. The data herein identifies the format as EPS, and gives the image title, creator, creation date, size and position of the image. Each line begins with a percent sign (%), which is normally interpreted in the PostScript language as the beginning of a comment line. Within the context of the EPS header, it takes on a different meaning.

Following the header is a block of PostScript code, which accomplishes the actual creation of the image.

The format proceeds with the bitmap data, or "graphics screen representation".

The EPI version of the EPS format, the version supported by ImageGear, contains an abridged interpretation of the image that is appended to the end of the file. It is usually smaller, and contains a lower resolution. One of the benefits of a preview image is that an application does not need to be able to interpret PostScript in order to display the image. Preview images are created with one of four file format types: TIFF, WMF, and EPS.

References Used

Brown, C. Wayne, and Barry J. Shepherd. Graphics File Formats: Reference and Guide. Greenwich, CT.: Manning Publications, 1992.

Murray, James D. and William vanRyper. Encyclopedia of Graphics File Formats. Sebastopol, CA: O'Reilly & Associates, Inc., 1994.

 

 


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