LIBIMP(3) Impressario LIBIMP(3)LIBRARY DESCRIPTIONlibimp provides a C Language application programming interface (API) for
reading and writing Silicon Graphics Image Format files and for
performing a number of format independent image processing operations.
These format independent operations include color space conversion and
filtered image zooming.
libimp provides all functionality of the libimage library. In addition,
libimp provides function prototypes, a documented interface, reliable
error reporting and a number of other enhancements.
LIBRARY ACCESS
A program that calls libimp functions must include the imp.h header file
located in the /usr/include directory. In addition, the program must link
with the libimp.a library located in /usr/lib. The link line would look
like:
... -limp ...
FUNCTIONS
The libimp library consists of two main sets of functions. The first set
of functions performs operations on SGI Image Format files. The second
set of functions performs operations on image data in a format
independent manner.
SGI IMAGE FORMAT FILE FUNCTIONS
Image Access
impOpen
impOpenFd
impOpenBuf
impOpenExt
impOpenFdExt
impOpenBufExt
impClose
impCloseFd
Image I/O
impReadRow
impReadRowB
impWriteRow
impWriteRowB
FORMAT INDEPENDENT FUNCTIONS
Zooming
impCreateZoom
impDestroyZoom
impResetZoom
impZoomRow
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LIBIMP(3) Impressario LIBIMP(3)
Data Packing
impPackRow
impUnpackRow
Math Operations
impZeroRow
impInitRow
impCopyRow
impSAddRow
impVAddRow
impSSubRow
impVSubRow
impSMulRow
impSDivRow
impClampRow
Color Space Conversion
impRGBtoW impWtoRGB
impRGBtoK impKtoRGB
impRGBtoCMY impCMYtoRGB
impRGBtoYIQ impYIQtoRGB
impRGBtoYUV impYUVtoRGB
impRGBtoYCbCr impYCbCrtoRGB
impRGBtoCMYK impCMYKtoRGB
impRGBtoDevCMYK
impRGBtoHSV impHSVtoRGB
impRGBtoHLS impHLStoRGB
Error Handling
impPerror
impErrorString
ACKNOWLEDGEMENTS
The libimp library is based heavily on the libimage and libgutil
libraries. These libraries have been available as gifts for a number of
years on SGI workstations. The principal author of these libraries is
Paul Haeberli. The zooming code is adapted from the libgutil izoom code
written by Paul Haeberli and Paul Heckbert.
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