SGI Developer Toolbox 6.1

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TOTALLY INSANE(tm) Graphics Tools and Utility Libraries OBLIGATORY NOTE THIS SOFTWARE IS PROVIDED "AS IS" WITH NO WARRANTIES OF ANY KIND INCLUDING THE WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. DO NOT USE NEAR WATER. DO NOT USE WHILE OPERATING HEAVY MACHINERY. This software is provided without support and without any obligation on the part of Silicon Graphics, Inc. to assist in its use, correction, modification or enhancement. There is no guarantee that this software will be included in future software releases. But what is guaranteed anyway? Paul Haeberli Silicon Graphics last updated: July, 1994 Contents: 128env - collection of spherical environment map images 128tex - collection of small texture map images abekas - utilities from Abekas Video Systems autopaint - "autopaint" an rgb image into various "altered states" compexp - compression explorer w/sliders to adjust compression params enhance - swank image processing GUI prog that makes use of libui.a envmaps - cubical format environment maps envtools - environment map tools fonts - a bunch of outline fonts in our polygonal outline font fmt fonttools - outline font tools images - some IRIS images that can be "ipaste"d to the screen imgtools - a collection of tools for dealing with images imp - "the new impressionist" -- an image paint program impression - interactive tools to create painted reps of scanned-in photos include - files defining various data structures used by the libs jpeg - jpeg img [de]compression sw + support to manip SGI image files leep - software implementation of the LEEP projection lib - contains pre-built--rle, tri, ui, vor--libraries libcan - basic support for creation and manipulation of canvases libgutil - a graphics utility library libimage - a library for reading and writing images libtiff - a tiff image library plus a tiff tools subdir movie - programs for compressing and decompressing streams of images mpeg - contains a public domain MPEG video software decoder mtex - img-processing app to massage images for use as texture maps objects - a bunch of sgo objects objtools - object tools pstools - postscript processing tools for the IRIS sgisep - has been removed--see note below for "sgisep" styline - create interactive hidden line drawing of a geometric object tools - desktop and graphics utilities tools tritest - decompose a complex polygons into a series of triangles vidiot - "video feedback" prog animates a face w/audio input vidpan - contains tools for controlling a Panasonic Video disc recorder vidsony - " " " " a SONY LVR-5000 Video disc recorder vidtools - tools for processing streams of video images vortest - example to document the structures in lib/libvor.a Paul 'n dave ======================================================= Minimalist breakdown of this subtree's contents follow: ======================================================= NEWEST CELEBRITIES/ADDITIONS TO THE "FAMBLEE" imgtools/icmp -- compares two IRIS images. The first and second images are placed in the front and back buffers respectively to start with. Two more images are computed. The third image in the scheem is as large as the largest image among the input images along both dimentions. It consists of identical pixels of the input images if exist, and 0x00ffff00 otherwise. The forth image is similar to the thirt, except that comparision is done only for the rgb channels excluding the alpha channel. This is useful for alphaless systems. ipaste_ogl -- an OpenGL implementation of ipaste which relies solely on Xlib. included are the necessary incarnations of the 3 libgutil files: fastimg.c, file.c, and misc.c needed by ipaste. pstools -- contains various programs combining operations with/on PostScript files with IRIS GL graphics. One can: transmute a b/w image file into a PostScript path which then generates a showpage command on output; print a square array of pages ("readable" is contained within "square factors" of 2 or 3) on a single paper page; take a PostScript document with page structuring conventions and generate 2 or 4 page signatures on a laser printer; print a calendar for one month using a specified image file; take one or more PostScript documents with page structuring conventions and insert transformations to adjust the offset and scale of the documents; take a PostScript document with page structuring conventions and output Postscript that prints the pages reduced in size and arrayed in x and y; print CMYK test scales that can be used to calibrate printers; and/or take a one page PostScript document, and generate a two dimensional array of copies on the output page. vidpan -- contains tools for controlling a Panasonic Video disc recorder, including: recording a specified range of processed frames on the video disc onto the disk recorder; record one frame from a live camera onto the video disc; turn on/off the numerical and status displays; set the frame number on the video disc for recording; record a single frame at the specified location on the video disc; display a sequence of frames from the video disc; have the disc recorder display the input video signal on its video output; have the disc recorder display video from the disc on its video output; and display a color image on the Indigo Starter video board and record a frame. vidsony -- contains tools for controlling a SONY LVR-5000 Video disc recorder, including: recording a specified range of processed frames on the video disc onto the disk recorder; turn on/off the numerical and status displays; set the frame number on the video disc for recording; record a single frame at the specified location on the video disc; display a sequence of frames from the video disc; have the disc recorder display the input video signal on its video output; have the disc recorder display video from the disc on its video output; and display a color image on the Indigo Starter video board and record a frame. jpeg -- contains the fourth public release of the Independent JPEG Group's free JPEG file format image compression/decompression software including images of libjpeg.a, cjpeg, and djpeg. Support has been added to manipulate SGI image files to/from jpeg format. See the README.sgi file in this directory for details on compressing SGI image files to jpeg format and then decompressing them back to SGI image format. JPEG is a standardized compression method for full- color and gray-scale images. JPEG is intended for compressing "real-world" scenes; cartoons and other non-realistic images are not its strong suit. JPEG is lossy, meaning that the output image is not necessarily identical to the input image. Hence you must not use JPEG if you have to have identical output bits. However, on typical images of real-world scenes, very good compression levels can be obtained with no visible change, and amazingly high compression levels are possible if you can tolerate a low-quality image. mpeg -- contains a public domain MPEG video software decoder. The decoder is implemented as a library that will take a video stream and display it in an X window on an 8, 24 or 32 bit deep display. The main routine is supplied to demonstrate the use of the decoder library. Several dithering algorithms are supplied based on the Floyd-Steinberg, ordered dither, and half-toning algorithms that tradeoff quality and performance. Neither the library nor the main routine (mpeg_play) handle real-time synchronization or audio streams. and much, Much, more TOTALLY INSANE (tm) stuff: Digital Video Data Generation and Support: vidiot -- demonstrates a fun video conferencing idea we're exploring. The concept is to use the amplitude of sound to select between a series of different images to animate a conversation. vidtools -- tools for processing streams of video images abekas -- this dir contains source code tools from Abekas Video Systems including conversion programs, reading and writing examples, and documentation on scsi connections to/from Abekas disk recorders. libgutil/abekas.c -- this module contains routines that can generate and read digital video data. imgtools/{fromyuv,toyuv} -- these 2 programs convert between Abekas digital video images and Iris image files. These tools can be used to record images from the Iris on a device that supports digital video data, or to make an image that can be displayed on the Iris. Environment Mapping Tools: 128env -- this dir contains a small collection of 128x128 processed spherical environment map images. We are actively collecting interesting 128x128 or 256x256 environment map images. Can you contribute to this growing collection? (see bottom of file.) 128tex -- this dir contains a small collection of 128x128 texture map images. We are actively looking for more interesting 128x128 and 256x256 texture map images. Can you contribute to this growing collection? (see bottom of file.) envmaps -- 3 384x256 environment maps in cubical format. Generation of new envmaps like these are accomplished with the tools in envtools. envtools -- (create and manipulate environment maps) Environment or Reflection mapping is a technique that uses texture mapping to simulate the smooth shading of reflective surfaces. It can be used to create very nice shading of more diffuse surfaces as well. A variety of tools for creating and manipulating environment maps are provided in the envtools directory: cylenv - make a cylindrical projection from a cubical env map envreduce - zoom a cubical env map down by a factor of 2 envexpand - zoom a cubical env map up by a factor of 2 fromfish - convert a mercator projection scanned fisheye image to a cubical env map frommerc - convert a mercator projection into a cubical env map sphereenv - make a spherical env map from a cubical by rendering a reflective sphere tofish - create a fisheye view of a cubical env map Polygonal Outline Font Format Tools: fonts -- this dir contains a collection of fonts in our polygonal outline font format plus one font composed of triangle meshes. New fonts can be created using the tools in fonttools. libgutil -- objfnt.c - this module contains basic support for our polygonal outline format charfill.c - this module contains code to create and draw anti- aliased bitmaps of an outline font fonttools -- Using the binary file format for storing fonts described above, these fonts can either be polygonal outlines, spline outlines, or triangle meshes. Various font conversion utilities are provided here: adjustfont - change the char spacing and origin of chars in a font afm2tfm - converts Adobe font metric files into TEX font metrix files bevelstring- creates extruded beveled chars from a spline outline of a polygon font charfill - render antialiased text using a polygonal outline font clonewid - copy widths from one typeface to another drawfont - draw characters with triangle meshes in a GL window fntslide - an example application that fills a polygonal font fonttest - demonstrates drawing filled and outlined text frompsf - convert a .psf font into the Hex format fromtype1 - converts an Adobe Type1 font to a spline or polygonal font in sgi format makepsfont - converts a polygonal or spline font into a PostScript font meshfont - automatically triangulate a polygonal font paintfont - a paint program that lets you create your own fonts by interactively painting character's glyphs printfont - prints a textual description of a font rawtohex - this will convert the binary type1 from to a printable hex format restoraw - take an Adobe type1 font from a Macintosh and write out a binary type1 font simpfont - used to eliminate fine detail in an outline font texfont - turn an outline font into a texture map textmap - use texture mapping to draw text totype1 - convert an outline font into a PostScript font undup - eliminate duplicate points on a .of file warpfont - apply geometric transformations (add slope or jitter) to a font Image Manipulation Tools: impression -- interactive tools for creating painted representations of scanned-in photographs. besides an interactive paint program called impression, the other tools can be used to manipulate paintings stored as a list of brush strokes. these brush stroke files are called "sample sets" and usually have a suffix of ".ss". enhance -- an image enhancement program that lets modify images by mutation and selection. the graphical interface lets you chose many enhancement operations, including gamma warping saturation, color balance, quantization, and sharpening. this is an example of a program that uses the Showcase UI library. autopaint -- automatically "paint" an rgb image where you can alter the size of image, do tiling, specify/vary the brush stroke image/size/ direction/alpha and control color noise. imp -- a swell paint program that does painting in software and copies onto the screen. it has several different brush shapes that can be continuously resized. the density of the paint can be controlled using a slider. various painting modes are supported: normal paint, local sharpening, image copy, etc. TRUELY HEINOUS. compexp -- an image compression application which uses the ShowCase UI library, compexp allows you to select various compression parameters and instantly see the results!!!!! YEEEEAHHHH! (same technique is used in the "movie" dir). movie -- includes programs for compressing and decompressing streams of images. VERY swank enhanced menu options including fullscreen and softzoom toggles. mtex -- a small image processing application capable of massaging scanned images for use as texture maps. It performs common operations such as color or contrast correction, cropping, and sharpening, plus unusual functions needed for texture maps. INSAAAAANE. Images/Image Processing Tools: images -- cool2.bw - cutline.bw - horlines.bw- "border" images used by imgtools/addborder regmark.bw - to surround an image with a border shadow.bw - logo.bw - oneill.bw - two IRIS black and white images rathouse0.bw - rathouse1.bw - rathouse2.bw - "rat house reality" black and white images PuebloB1.rgb - SGI imagelib images of photographs taken inside PuebloB2.rgb - Pueblo Bonito, Chaco Canyon, New Mexico RoundRock.rgb - Round Rock, Arizona where hiways _ and _ meet Aztec.rgb - Aztec Nat'l Monument in Aztec, New Mexico, Lomaki.rgb - Lomaki House from Wupatki Ruins, Arizona ratman.rgb - the toolbox janitor gear[1-8].rgb, duogear - photogs of gears turned into image files. austin.rgb bill.rgb, chair.rgb, cmyk.rgb, dave.rgb, deerstroke.rgb, drab.rgb, forestcar.rgb, gun.rgb, jeff.rgb, kandplate.rgb, kat.rgb, kupka.rgb, marriott.rgb, max5.rgb, tango.rgb, tent.rgb, vase.rgb, vase1.rgb, vase2.rgb - a smattering of images from paul's virtual image space. imgtools-- abs -- get the absolute value of an image add -- add two images together addborder -- surround an image with a border image. addframe -- add a border to an image addnoise -- add noise to an image assemble -- assemble an array of smaller images bgpaste -- paste an image onto the root window blend -- linearly interpolate two images blur -- low pass filter an image bmdither -- dither img to 1-bit deep bitmap w/err propagation dithering bmthresh -- threshold one image with another and write out a bitmap btree -- display an image using binary tree ordering cglue -- create an rgb image out of 3 black and white images conimg -- (replaces nullimg) creates a constant (single) color image convolve -- convolve an input image with a kernel image cscale -- individually scale the R G B channels of an image cutimg -- extract an particular sized image from a source div -- divide the brightness of two images dotgen -- make an image of two crossed sinusoidal wave patterns duotone -- create a duotone image from a single channel image encode -- classify an image chosing colors from a specified color map fieldmerge-- merge two field images into one frame findcolor -- find colors in a source image fitimg -- uniformly scale an image to a specific size fromalias -- convert an Alias image to an IRIS image frombin -- convert a binary dump of image data to an IRIS image fromcmap -- convert a color map into an image with one scanline fromdi -- convert an old SGI .di dithered image into an IRIS image fromface -- convert a UNIX faceserver image to IRIS format fromgif -- convert a Compuserve GIF image to IRIS format frommac -- convert a MacPaint image to IRIS format frompic -- convert a MOVIE BYU .PIC image to IRIS format fromppm -- convert a PPM file to IRIS format fromrla -- convert a Wavefront image to an IRIS image fromsun -- convert a sun rasterfile image to IRIS format fromtarga -- convert a targa image into an IRIS image fromtiff -- convert almost any tiff image file to IRIS format fromutah -- convert a UTAH raster toolkit image into an IRIS image fromxbm -- convert an X Bitmap image to IRIS format fromxwd -- convert an xwd file to IRIS format fromyuv -- convert an Abekas yuv image to IRIS format gammawarp -- lighten or darken an image gendit -- perform general image dithering greyscale -- make 19 different image patterns halftone -- half-tone an image, using Hollaway's technique hipass3 -- high pass filter an image using a 3x3 filter kernel hist -- compute and display the histogram of an image file histeq -- perform histogram equalize an image file iavg -- average a set of images iblend -- blend 2 images using a (bw) mat icmp -- visually compare two iris images iflip -- flip an image imean -- finds the average pixel value of an image imgexp -- expand the range of pixel values in an image imgsize -- print the xsize, ysize, and zsize of an image imgwrap -- shift pixels left one bit invert -- invert an image ipaste -- display an image iroll -- rotationally roll an image in x and y directions irotate -- rotate an image by a given angle isame -- compare 2 images pixel by pixel to see if they're the same iset -- set the type (NORMAL,DITHERED,SCREEN,COLORMAP) of an image istat -- print the header information of a list of image files izoom -- magnify or shrink an image jpaste -- an ipaste for JPEG compressed images loadmap -- loads a colormap stored in a file mapimg -- translates a screen image into an RGB image max -- get the maximum of two images min -- calculate the minimum of two images mksep -- convert an RGB image into C, M, K, and K images movie -- display a series of images in a "movie" sequence mult -- multiply two images noblack -- remove all the black from an image normtodir -- determine the direction of the gradient across an image oneband -- get a single band (or channel) of an image over -- put one image on top of another perhist -- print percent histogram values for an image postcard -- make an image look like a postcard quant -- quantify an image to have n levels randimg -- generate a random noise image readimg -- simple example using libimage to read an RGB image file rectimg -- display a color or BW image on the iris repcolor -- replace specified colors within an image rle -- force an image to be stored using run length encoding rmsdiff -- calculate the rms difference between two images roam -- roam around a very large image using tiles rothue -- rotate the hue of an image saturate -- increase of decrease an image's saturation level savemap -- save the current contents (or subrange) of the colormap scope -- explore/view an image of any size scrsave -- save a part of the screen into an IRIS image file setlum -- modifies the luminance (brightness) on an image shear -- shear an image diagonally showimg -- example using libimage to open, read and display an image slide -- zoom an image up for full screen display snapshot -- save a portion of the screen in an image file softframe -- add a black frame around an image sub -- subtract two images subimg -- extract a sub-region from an image into a new image file thresh -- threshold one image with another using a threshimage tile -- repeat an image in two dimensions toalias -- convert an IRIS image to an Alias image toascii -- use text characters to represent an IRIS image tobin -- convert an IRIS image to a binary dump of pixel data tobw -- convert an IRIS color image to black and white togif -- convert an IRIS image to a Compuserve GIF image tomac -- convert an IRIS image to MacPaint format tonews -- convert an IRIS image to NeWS format topict -- convert an IRIS image to Macintosh PICT format toppm -- convert an IRIS image to Jef Poskanzer's ppm format tops -- convert an IRIS image to PostScript format toscitex -- convert IRIS images into Scitex CT2T images tosun -- convert an IRIS image to a sun raster file totarga -- convert an IRIS image to a type 2 (RGB) targa image totiff -- convert a color or b&w IRIS image file into tiff format toutah -- convert an IRIS image to Utah raster toolkit format toyuv -- convert an IRIS image to yuv format toxwd -- convert an IRIS image to X11 window dump (xwd) format unframe -- remove constant colored pixels from around an image verbatim -- force an IRIS image to be stored in verbatim format vhist -- display a 3-D volume histogram of a color image writeimg -- simple libimage example to write out an RGB image file xzoom -- magnify or minify an image in the x direction Image Libraries: libimage -- libimage contains the modules necessary to create, open, read and write IRIS image files. See libimage/README for the dope on the fundamentals of libimage.a. (README.lp to PostScript printers) NOTE: there is a new image processing library called libil.a. This Image Library (IL) is a bonafide software product with completely documented and supported features. Its default image file format is tiff, but it also understands everything about IRIS image file format. This C++ library is an object-oriented, extensible toolkit for creating, processing and displaying images on all SGI platforms. With the release of this IL, the singular reliance on libimage's core capabilities is being superceded by a library supplying a superset of functionality available from libimage. It is important for all developers and programmers to understand the reality of libil.a's existence. libgutil -- contains MANY modules making up a collection of graphics utilities used by the programs in envtools, fonttools and imgtools. There is also a copy of this library that lives in /usr/lib. This library includes functions to triangulate concave polygons, draw character strings with geometry, create beveled and extruded shapes, automatic generation of triangle meshes, AND MUCH MUCH MORE!!!!!! Documentation is still needing to be expanded for this, but a starting point is the libgutil/libgutil.README file. libcan -- this library supports doing image processing operations on arrays of pixels. used by the "imp" and "enhance" programs. libtiff -- contains public domain TIFF support software. Included is a library, libtiff, for reading and writing TIFF files. The library, along with associated tool programs, should handle most of your needs for reading and writing files that follow the 5.0 TIFF spec for Classes B, G, P, and R. There is also some support for proposed additions that are to appear in the 6.0 TIFF spec. Also included is a couple of directories of contributed stuff, a documentation directory containing a copy of the 5.0 spec, and some test images for most formats supported by the library. Please consult the various README files for more details on what is included, what to do, etc. lib/librle.a -- contains the library part of the Utah Raster Toolkit distribution version 3.0 of June, 1990. "imgtools/fromutah" and "imgtools/toutah" are image file conversion programs that need this library. The Utah Raster Toolkit is now distributed from the University of Michigan and the University of Utah. Other Libraries: lib/libtri -- This library supports triangularization of concave polygons. libtri is able to take concave polygons, and/or polygons with holes in them, and correctly decompose these complex polygons into a series of triangles. An example program in tritest/tritest.c demonstrates an implementation of this process. We are not able to include the source for this library at this time. lib/libui.a -- the showcase development library is included cuz more things are being written using the showcase ui (see compexp, enhance, movie, and styline).. lib/libvor.a -- used with the impression programs, libvor.a--written by the great Seth Teller (no relation to the destructively obsessed Edward T.)-- is a voronoi partition/delaunay triangulation library based on Steve Fortune's plane sweep algorithm published in "Algorithmica," 1987, "A Sweepline Algorithm for `Voronoi' Diagrams", volume 2, pp. 153-174. An example program can be found in ../vortest with its accompanying copy of vordefs.h to better document the structures defined/accessed in libvor.a. Geometry Tools: Simple Geometry Format modules -- libgutil/{sgiobj.c, sgiobjgl.c} contains the routines to create: - List of quadrilaterals - List of triangles - Mesh of triangles All of these are used to create objects of sgo format for representing 3D geometry. Each sgo object is either a list of quadrilaterals, a list of triangles, or a list of triangle meshes. The programs in the "objtools" dir provide various tools for operating on these objects. These tools use various functions from libgutil that support a simplified interface to describe shading, automatic triangle mesh generation and efficient drawing of geometry. libgutil/tmeshobj.c has code which takes an sgo format object composed of a list of triangles and makes this into a tmesh. objects -- contains a collection of sgo objects. objtools -- avgnorm - averages the normals on all polygons in a triangle or quadralateral object explode - translate verticies in direction of normals fitobj - fits an object into a unit cube layer - view an sgi object interactively makeoct - can be used to create spheres objprint - prints a textual description of an object objstat - prints info about an sgi object spin - virtual sphere rotation interface sterrend - cheap red/cyan stereo subdiv - subdivide triangles to maximum edge length swcurve - create surfaces of rotation from a textual list of numbers tlbsp - BSP sort a triangle list tldraw - draw a triangle list tlfit - fit a triangle list to a -1,1 -1,1 space tlline - locate interesting edges in a set of triangles tllint - merge coordinates that are almost identical tlsplit - split all intersecting triangles in a triangle list tlsub - fit a triangle list into a -1.0..1.0 -1.0..1.0 space tltops - draw a triangle list tltotext - print a triangle list in text format tomesh - auto tmesh generation. tosgo - converts old spin formant objects to sgo format totri - convert a quadlist object into a triangle list warpgeom - warps the geometry of an object warpnorm - this warps the normals of an object Color Correction Software for Printing: sgisep -- We used to provide a subtree of color separation software to convert RGB images to film for 4 color printing, but it is felt you will get better results by simply sending your original rgb images to Phoenix Press directly. Their fown # is 714/261-0333. Ask for James Levesque. Graphics Desktop Tools For The IRIS: tools -- desktop tools: blanktime - set the number of frames before the screen blanks cedit - a simple color editor clock - a simple desk clock colorbars - colorbar generator cycol - display a palette of colors dynadraw - caligraphic drawing program gamcal - visually check gamma display calibration grid - draw a 10 by 10 grid for aligning a camera to the display ical - a simple desk calendar interp - gamma-corrected linear color ramp generator mag - pixel replication and magnification in a window makemap - reload default color lut values into the GL color map mousemon - display state of the three mouse buttons palette - display a palette of colors in the colormap showmap - display the contents of the GL color map textcolors- set the colors used by a xwsh window vis - copy the bytes of a file to the screen weave - a weaving simulator for IRIS workstations graphics utility tools: cpprint - print an image file on a color PostScript printer pprint - print an image file on an adobe post script printer rgntest - an rgn example useful for management of regions tritest - using libtri.a, a way to triangulate complex polygons In their own universe: styline -- creates hidden line drawings of 3-D geometry, and uses the Showcase UI library to provide sliders that control the graphical style of the hidden line drawing. vortest -- libvor.a is a voronoi partition/delaunay triangulation library based on Steve Fortune's plane sweep algorithm published in "Algorithmica," 1987, "A Sweepline Algorithm for `Voronoi' Diagrams", volume 2, pp. 153-174. Its .h file, "vordefs.h," and an example program, vorexamp.c, are included in this directory to better document the structures defined/accessed in libvor.a. BIZZARRE!!!! Other Geometry Libraries: PostScript-like path library - libgutil/path.c Matrix library of routines - libgutil/matrix.c Vector library of routines - libgutil/vect.c Easier GL lighting of geometry - libgutil/glshade.c Automatic triangle meshing - libgutil/tomesh.c tomesh.c provides the routines to take a set of triangles and make a tmesh out of this list of triangles Other Libraries: Virtual-sphere interface libgutil/track.c General image dithering libgutil/gendit.c & imgtools/gendit.c Picking colors from screen libgutil/getapixel.c Graphics machine type query gfxmachine() inside libgutil/glstuff.c Screen gamma tools/{gamcal.c, gamma.c} For anyone wishing to contribute any texture map or environment map images to our growing collection please contact: dave ratcliffe Silicon Graphics Inc. 2011 N. Shoreline Blvd. Mountain View, CA 94039 email: dave@sgi.com OR devprogram@sgi.com or simply send me a tar tape of the stuff you'd like us to check out. make sure you include an intelligible return address so i can send the tape back to you afterwards.