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End-users will want to use texture maps from many different
sources. For scientific data display applications, the texture maps
will be created from real-world data and may be in almost any for
mat. One of the application developer's jobs is to support the importation
of this data into the application or to document the supported formats
so the end user can translate their data into these formats. Some end-users will want to create
their own texture maps using paint programs, scanners, video-in
equipment, screen grabs, etc. Again, the application needs to provide
a mechanism for the user to use files with these formats for texture
maps. The binary version of a texture file reader, read_texture, is included
in the directory 〈hp-examples〉/TexMap[22]. This utility will read files from several
different formats and produce a PEXlib-compatible texture data structure
suitable for passing to PEXExtCreateFilteredTM.
A source code interface to the read_texture
utility is provided in read_tex.c
in the same directory. All of the example programs included in this
tutorial use this interface to read texture files. The utility will
read the files formats listed in the following table of file suffixes,
formats, supported versions, and typical contents: - .tif
TIFF, version 5.0 (6.0 for TIFF JPEG). Contains
PC, scanned, or FAX images. Note that TIFF images may be in uncompressed
format, or any of the following compressed formats: JPEG, LZW, G3,
G4, or Packbits. - .jpg
or .jpeg
JFIF, version 8-R8. Contains JPEG-compressed images. - .gif
GIF, version 87a. Contains xv and xgif images. - .xwd
XWD, version X11. Contains pixmap images from xwd (Z format). - .xbm
or .bm
XBM, version X11. Contains bitonal X bitmap images. - .xpm
or .pm
XPM, version 3.0. Contains color X pixmap images. - .bmf
BMF, version 1. Contains Starbase bitmap images
(Z format).
The file reader, read_texture,
is provided for your convenience, particularly to use one of the
example programs with a texture file of your own choosing. The file
reader is not guaranteed to read all files in the supported formats;
in particular, it does not support maps with an alpha channel included.
For a more robust and complete solution, the HP product, HP B2157A
"Image Developer's Toolkit for the S700" supplies source code for
read/write, display, file format conversions, and compression/decompression
for multiple file types. Please contact your local Hewlett-Packard
Sales Office or the Customer Information Center at (800)752-0900
for more information on ordering this product. Libraries of predefined textures are also available.
These provide myriad textures including interiors (carpets, tiles,
wood grains), and natural textures (skies, rainbows, etc.).
Sources of Textures | |
The following products facilitate texture creation and editing.
Please contact the companies directly for details and pricing. These
products are listed for your information only, and except for the
products from HP, do not represent an endorsement by HP. Pixel!FX Scanner
support, image viewing and manipulation including resize, blend,
rotate, etc. Supports TIFF, XWD, X bitmap and GIF formats. Contact:
Mentalix, 1700 Alma Drive Suite 110, Plano, Texas 75075. Phone:
(214)423-9377; Fax: (214)423-1145. HP C1788A ScanJet IIc for Series 700 Workstations
High-performance, color and grayscale flatbed scanner. Scans to
TIFF format. Contact your local Hewlett-Packard Sales Office or
the Customer Information Center at (800)752-0900. HP Z1100A RasterOps VideoLive Card
Digitizes and captures images from video to main memory on demand.
Saves images to TIFF files. Contact your local Hewlett-Packard Sales
Office or the Customer Information Center at (800)752-0900. HP MPower Software supports
image scanning, view, and manipulation of images for scale, contrast,
and brightness. Supports TIFF, JFIF, GIF, XWD, XBM, XBM, and BMF.
Contact your local Hewlett-Packard Sales Office or the Customer
Information Center at (800)752-0900. HP B2157A Image Developer's Toolkit for
S700 Developer's tool for bundled HP-UX Image Lib. ImageLib
supports read/write, display, file format conversions and compression/decompression
for multiple file types including TIFF, JFIF, GIF, XWD, XBM, and
XPM. Includes source code. Contact your local Hewlett-Packard Sales
Office or the Customer Information Center at (800)752-0900.
Predefined Textures | |
There are texture map libraries on CD-ROM available from the
following sources. Please contact the companies listed for pricing
and more information. These products are listed for your information
only, and do not represent an endorsement by HP. Pixar One Twenty Eight CD
Photographic textures include bricks, fabrics, environmental, landscaping,
etc. Includes 128 512×512×24 bit images in TIFF
format. Contact: Pixar, Attn: Renderman Retail, 1001 West Cutting
Boulevard, Richmond, CA 94804. Phone: (510)236-4000, fax: (510)236-0388. ImageCELs® Includes
building materials, environmental, "designer" patterns, landscaping,
and industrial finishes. Supports file formats: 8-bit GIF, PCS,
IFF, TIFF, TGA, and DIB; 16-bit TGA, I16, WIN; 24-bit TGA and CEL.
To request a catalog, call (408)252-4706 (you must use fax machine
handset). Contact: Imagetects™, P.O. Box 4, Saratoga, CA
95071-0004. Phone: (408)252-5487, fax: (408)252-7409. PhotoDisc Photographs of people,
nature, places, etc. in PICT or JPEG-Compressed TIFF format. Contact:
PhotoDisc, Inc. 2013 Fourth Avenue, Seattle, Washington 98121. Phone:
(206)441-9355, fax: (206)441-9379.
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