diff options
Diffstat (limited to 'giflib-4.1.6/doc/index.html')
| -rw-r--r-- | giflib-4.1.6/doc/index.html | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/giflib-4.1.6/doc/index.html b/giflib-4.1.6/doc/index.html deleted file mode 100644 index 0b62c0c..0000000 --- a/giflib-4.1.6/doc/index.html +++ /dev/null @@ -1,215 +0,0 @@ -<!doctype HTML public "-//W3O//DTD W3 HTML 2.0//EN"> -<HTML> -<HEAD> -<TITLE>Introduction to GIFLIB</TITLE> -<link rev=made href=mailto:esr@snark.thyrsus.com> -</HEAD> -<BODY> -<CENTER><H1>Introduction to GIFLIB</H1></CENTER> - -GIFLIB is a package of portable tools and library routines for working -with GIF images. You can find the latest version at the GIFLIB home -page <a -href="http://www.ccil.org/~esr/giflib">http://www.ccil.org/~esr/giflib</a>.<P> - -The Graphics Interchange Format(c) specification is the copyrighted -property of CompuServe Incorporated. GIF(sm) is a service mark -property of CompuServe Incorporated. As this package existed before -UniSys's lawyeritis attack of New Years' Day 1995, it is grandfathered -in under their license terms and you do <em>not</em> have to pay fees -for using it.<P> - -This package has been released under an X Consortium-life freeware -license. Use and copy as you see fit. If you make useful changes, -add new tools, or find and fix bugs, please send your mods to the -maintainers for general distribution.</P> - -The util directory includes programs to clip, rotate, scale, and -position GIF images. It includes an X11 viewer, code to dump GIFs to -an Epson-compatible printer in graphics mode, and many conversion -utilities. These are no replacement for an interactive graphics -editor, but they can be very useful for scripted image generation or -transformation.<P> - -The library includes program-callable entry points for reading and writing -GIF files, an 8x8 utility font for embedding text in GIFs, and an error -handler. GIF manipulation can be done at a relatively low level by -sequential I/O (which automatically does/undoes image compression) or at -a higher level by slurping an entire GIF into allocated core.<P> - -This library speaks both GIF87a and GIF89. The differences between -GIF87 and GIF89 are minor: in the latter, the interpretation of some -extension block types is defined. The library never needs to actually -interpret these, but <a href="giftext.html">giftext</a> notices them.<P> - -<H1>Utilities</H1> - -Here is a summary of the utilities in this package. If you're looking -at this page through a web browser, each utility name should be a -hotlink to HTML documentation.<P> - -<H2>Conversion Utilities</H2> - -<DL> -<DT><a href="gif2bgi.html">gif2bgi</a> -<DD>display GIFs on IBM PC displays using the BGI (Borland) driver -<DT><a href="gif2epsn.html">gif2epsn</a> -<DD>dump images saved as GIF files on Epson type printers -<DT><a href="gif2herc.html">gif2herc</a> -<DD>display GIFs on IBM PC displays using the Hercules graphic card -<DT><a href="gif2iris.html">gif2iris</a> -<DD>display GIFs under SGI NeWs window system -<DT><a href="gif2ps.html">gif2ps</a> -<DD>print GIF file on laser printers supporting PostScript -<DT><a href="gif2rgb.html">gif2rgb</a> -<DD>convert images saved as GIF to 24-bit RGB image(s) -<DT><a href="gif2rle.html">gif2rle</a> -<DD>convert images saved as GIF to RLE (Utah raster toolkit) format -<DT><a href="gif2x11.html">gif2x11</a> -<DD>display images saved as GIF files under X window system -<DT><a href="raw2gif.html">raw2gif</a> -<DD>convert raw 8-bit image data into GIF files -<DT><a href="rgb2gif.html">rgb2gif</a> -<DD>convert 24 bit images to a GIF image using color quantization -<DT><a href="rle2gif.html">rle2gif</a> -<DD>convert images saved as RLE (Utah raster toolkit) to GIF format -</DL> - -<H2>Test Pattern Generators</H2> - -<DL> -<DT><a href="gifbg.html">gifbg</a> -<DD>generate a single-color test pattern GIF -<DT><a href="gifcolor.html">gifcolor</a> -<DD>generate color test patterns -<DT><a href="gifwedge.html">gifwedge</a> -<DD>create a test GIF image resembling a color monitor test pattern -</DL> - -<H2>Image Manipulation Components</H2> - -<DL> -<DT><a href="gifasm.html">gifasm</a> -<DD>assemble multiple GIFs into one, or burst a multiple-mage GIF -<DT><a href="gifclip.html">gifclip</a> -<DD>clip or crop a GIF image -<DT><a href="gifclrmp.html">gifclrmp</a> -<DD>modify GIF image colormaps -<DT><a href="gifcomb.html">gifcomb</a> -<DD>combine 2 GIF images of exactly the same size into one -<DT><a href="giffix.html">giffix</a> -<DD>clumsily attempts to fix truncated GIF images -<DT><a href="gifflip.html">gifflip</a> -<DD>flip GIF image along X or Y axis or rotate by 90 degrees -<DT><a href="gifinter.html">gifinter</a> -<DD>convert between interlaced and non interlaced images -<DT><a href="gifovly.html">gifovly</a> -<DD>generate one composite GIF from a multiple-image GIF -<DT><a href="gifpos.html">gifpos</a> -<DD>change a GIF's screen size or recondition it. -<DT><a href="gifrotat.html">gifrotat</a> -<DD>rotate a GIF through any desired angle -<DT><a href="gifrsize.html">gifrsize</a> -<DD>resize a GIF by deletion or duplication of bits -<DT><a href="gifburst.html">gifburst</a> -<DD>burst a GIF image into subrectangles. -</DL> - -<H2>Report Generators</H2> - -<DL> -<DT><a href="giftext.html">giftext</a> -<DD>print (text only) general information about a GIF -<DT><a href="gifhisto.html">gifhisto</a> -<DD>generate color-frequency histogram from a GIF -</DL> - -<H2>GIF Composition Tools</H2> - -<DL> -<DT><a href="icon2gif.html">icon2gif</a> -<DD>converter/deconverter to/from an editable text format -<DT><a href="text2gif.html">text2gif</a> -<DD>generate GIF images out of regular text in 8x8 font -<DT><a href="gifinto.html">gifinto</a> -<DD>end-of-pipe fitting for GIF-processing pipelines -<DT><a href="gifcompose.html">gifcompose</a> -<DD>use giflib tools to compose images -</DL> - -<H2>C Code Templates</H2> - -<DL> -<DT><a href="giffiltr.html">giffiltr</a> -<DD>template code for filtering a GIF sequentially -<DT><a href="gifspnge.html">gifspnge</a> -<DD>template code for filtering a GIF with in-core operations -</DL> - -Under MS-DOS, most filters will print the current input scan line number -(counting up) whenever they read image input, and will print output image line -number (counting down) when they dump output. Utilities that only read or -write always print in increasing order. Utilities (like GifPos that only -change positions) that copy the image as a block of compressed data will print -nothing --- they cannot identify a scan line number, and are enough faster that -the feedback to the user doesn't seem necessary.<P> - -Some of the utilities require memory on the order of the whole screen, while -others read one scan line at a time. Each utility HTML file has entry called -<em>Memory Usage</em> which will be one of:<P> - -<DL> -<DT> Line <DD> memory required is on the order of one scan line -<DT> Image <DD> proportional to the size of the biggest image in GIF file -<DT> Screen <DD> proportional to GIF screen size -</DL> - -In all cases a byte is allocated per pixel, so an image of 320 by 200 pixels -will requires approximately 64k bytes of main memory.<P> - -<H1>Library Functions</H1> - -The library contains two groups of C functions. One group does sequential -I/O on the stream-oriented GIF format. The other supports grabbing an -entire GIF into allocated core, operating on it in core, and then writing -the modified in-core GIF out to disk.<P> - -Unless you are on a 286 or some other very memory-limited machine -running under DOS, you probably want to use the second group.<P> - -Detailed documentation on the library entry points is in <a -href="gif_lib.html">gif_lib.html</a>. Library error codes are -described in <a href="liberror.html">liberror.html</a><P> - -<H1>The GIF Standard</H1> - -The doc subdurector includes flat-ASCII descriptions of <a -href="gif89.txt">GIF89 format</a> and <a href="lzgif.txt">Lempel-Ziv -Compression</a>.<P> - -<H1>History</H1> - -This package was originally written by Gershon Elber <gershon@cs.utah.edu> -in 1990 on an IBM PC under MS-DOS using Borland Turbo C. He made it portable -to several UNIX environments.<P> - -The 2.1 version featured substantial changes and additions by Eric -S. Raymond <esr@snark.thyrsus.com>. These included the -DGifSlurp/EGifSpew function pair for enabling non-sequential -operations on GIF images and the tools icon2gif, gifovly, gifburst, and -gifcompose.<P> - -The 2.4 version converted all the docs from an idiosyncratic -plain-text formal to to HTML.<P> - -<H1>Package Status</H1> - -GIFLIB's current maintainer is Eric S. Raymond. You can find his home -page at <a href="http://www.ccil.org/esr">http://www.ccil.org/esr</a>.<P> - -GIFLIB is not under active development, but bug fixes are being accepted.<P> - -<HR> -<ADDRESS>Eric S. Raymond <A HREF="mailto:esr@thyrsus.com"><esr@snark.thyrsus.com></A></ADDRESS> -</BODY> -</HTML> |