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Photo
Magic supports numerous file formats. The following information
will help you decide which format to use.
Quick
summary
- Use
gif, jpg
and png for the web.
Widely supported.
- Use
bmp files for fastest
loading and saving. Not for web use - they take lots of
space. Widely supported.
- Use
jpg, png,
or tif to save on
disk space. Widely supported.
Web
formats
Web
browsers support only a small number of formats. If your
images are meant for viewing through a web browser, use
the following formats:
- CompuServe
Graphics Interchange Format (gif) or Portable Network
Graphics (png), for 256-color images (8-bit, mostly
computer generated images)
- JPEG
File Interchange Format (jpg, jpeg) or Portable
Network Graphics (png), for photographic images
and high-resolution images (24-bit - millions of colors)
Supported
formats
- Adobe
Photoshop (psd). The format produced by the
Adobe Photoshop graphics editor.
- CompuServe
Graphics Interchange (gif). This format is
created by CompuServe for storing and exchanging color
raster images. It is widely used on the web for 256-color
(8-bit) images. It does not support more than 256 colors.
- Dr.
Halo (cut). Dr. Halo files are device-independent
images. The image is stored in one file (.CUT) and the
palette is stored in a separate file (PAL). If the image
has no corresponding .PAL file, it is considered a grayscale
image. Supports only 256-color images.
- Encapsulated
PostScript (eps). These files are used primarily
on PostScript printers. These printers usually offer more
variety of fonts and higher resolution than standard laser
printers. EPS files will work on any PostScript compatible
printer and any end-user application that supports placement
of EPS files in its work space.
The image that you read from an EPS file can be either
a PostScript raster image, an embedded TIFF image, or
an embedded WMF image. The image that you write to an
EPS file is always a grayscale PostScript raster image
with 256 shades of gray.
- Flic
Animation (flc, fli). The Flic file is an animation
file created by Auto-desk. This file has two versions.
The fli file types support 320x200 images with a maximum
of 64 colors per image. The FLC file types support up
to 64k x 64k images with 256 colors per image.
- Interchange
File (iff). This is a general purpose data
storage format that can associate and store multiple types
of data. You can read RLE-compressed (Run Length Encoding),
and non-compressed images. You can write only RLE-compressed
images. RLE-compression is fast, but not as good as other
compression methods.
- JBIG
format (jbg). This is an industry standard
lossless compressed file format for bi-tonal (black and
white), grayscale and color images.
- JPEG
File Interchange Format (jpg; jpeg). JPEG format
offers high-compression ratio and comes in many lossy
and lossless flavors. It is widely used on the web and
supported by all web browsers.
- Kodak
FlashPix (fpx). The FlashPix file format was
developed through the combined efforts of Eastman Kodak
Company, Microsoft Corporation, Hewlett-Packard Company,
and Live Picture Inc. It combines the best features of
existing formats with object orientation to make the use
of digital color images easier. 8-bit and 24-bit images
are supported.
- LEAD
CMP (cmp). This format offers excellent JPEG-based
compression, but is not widely supported.
- MacPict
(pct). MacPict files are produced using Macintosh
QuickDraw, and are used in desktop publishing and imaging
applications. PCT Vector files can be read and written
as raster images in the non-vector toolkits.
- OS/2
Bitmap (OS/2 bmp). These are files created
on an OS/2 operating system. Both 1.x and 2.x formats
are supported.
- Portable
Greymap (pgm). This format only supports grayscale
images with 256 shades of gray.
- Portable
Network Graphics (png). This format is a replacement
for the gif format. It offers excellent compression ratios
and is widely used on the web. It supports 1, 4, 8, and
24-bit images.
- Portable
Pixelmap (ppm). Rarely used format.
- Silicon
Graphics Image (sgi). This file format was
developed at Silicon Graphics, and is used for uncompressed
and RLE-compressed black and white, grayscale and color
images. 8, 24, and 32-bit images are supported.
- Sun
Raster (ras). This format native to Sun UNIX
platforms. 1, 4, 8, 24, and 32-bit images are supported.
- Tagged
Image File Format (tif; tiff). This is a widely
used format supporting multiple compression methods and
color depths.
- Truevision
TARGA (tga). This file format is created by
Truevision Inc for uncompressed and RLE_compressed images.
- Windows
Bitmap (bmp). This is a file format created
by Microsoft. Some BMP images are compressed with an RLE-type
compression. Bitmaps are fastest to load. However, they
are not suitable for the Internet because they occupy
plenty of disk space.
- Windows
Clipboard (clp). This format is used to exchange
data between different Windows applications.
- Windows
Enhanced Meta File (emf). The Enhanced Windows
Metafile format is a vector format that may or may not
also contain a raster image. Emf and wmf vector files
can be read and written as raster images in the non-vector
toolkits.
- Windows
Meta File (wmf). The Windows Metafile format
is a vector format that may or may not also contain a
raster image. Emf and wmf vector files can be read and
written as raster images in the non-vector toolkits.
- Word
Perfect (wpg). This format can contain vector
or raster images. Photo Magic handles only the raster
images. 1, 4, and 8-bit images are supported.
- X
Window Dump (xwd). This file format is used
to store and restore screen window images. Two versions
of this file exist, the X10 window dump and the X11 window
dump. These versions differ slightly in the format of
the data.
- XPicmap
File (xpm). These files are used to store X
Window PixMap information to disk. They are capable of
storing black-and-white, grayscale, and color images.
Image data is stored in the form of ASCII text formatted
as a standard C character string array. 1, 8, and 24-bit
images are supported.
- ZSoft
PCX (pcx). This is a file format created by
ZSoft. This format compresses its image data with the
RLE type compression. 1, 4, 8, and 24-bit images are supported.
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