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SunOS 5.10 - man page for mlib_imagelookup2 (sunos section 3mlib)

mlib_ImageLookUp2(3MLIB)		      mediaLib Library Functions		     mlib_ImageLookUp2(3MLIB)

NAME
mlib_ImageLookUp2 - table lookup
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_ImageLookUp2(mlib_image *dst, const mlib_image *src, const void **table, const mlib_s32 *off- sets, mlib_s32 channels);
DESCRIPTION
The mlib_ImageLookUp2() function maps the source image to the destination image by using the user-specified lookup table and an offset. The source and destination images must have the same width and height. The source and destination images can have different data types. See the following table for available varia- tions of the table lookup function on image types: Type [*] BYTE SHORT USHORT INT FLOAT DOUBLE MLIB_BIT Y MLIB_BYTE Y Y Y Y Y Y MLIB_SHORT Y Y Y Y Y Y MLIB_USHORT Y Y Y Y Y Y MLIB_INT Y Y Y Y Y Y [*] Each row represents a source data type. Each column represents a destination data type. The source and destination images also can have a different number of channels. The source image can be a sin- gle-channel image or can have the same number of channels as the destination image. The lookup table can have one channel or have the same channels as the destination image. See the following table for possible varia- tions on the number of channels in the images and the lookup table: # of channels in # of channels in # of channels in the input image the lookup table the output image 1 n n n 1 n n n n where, n = 1, 2, 3, 4. Each of the following equations is used in the corresponding case shown in the table above. dst[x][y][i] = table[i][src[x][y][0] - offsets[i]] dst[x][y][i] = table[0][src[x][y][i] - offsets[0]] dst[x][y][i] = table[i][src[x][y][i] - offsets[i]]
PARAMETERS
The function takes the following arguments: dst Pointer to destination image. src Pointer to source image. table Pointer to lookup table. The data type of the lookup table is the same as that of the destina- tion image.. The format of the lookup table is: table[channel][index] The entries are indexed from 0 to 1, 2, ..., and so on. It is the user's responsibility to provide a lookup table that has enough entries to cover all possible values of the pixel com- ponents deducted by the offset in each channel of the source image. offsets Offset values subtracted from the src pixel before table lookup. channels Number of channels in the lookup table. If the number of channels equals 1, then the same ta- ble is applied to all channels. Otherwise, the number of channels must be no less than the number of channels in the destination image.
RETURN VALUES
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+
SEE ALSO
mlib_ImageLookUp(3MLIB), mlib_ImageLookUp_Inp(3MLIB), mlib_ImageLookUpMask(3MLIB), attributes(5) SunOS 5.10 10 Nov 2004 mlib_ImageLookUp2(3MLIB)


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