Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

(opensolaris section 3mlib)
man page for mlib_imagemulalpha

mlib_ImageMulAlpha(3MLIB)				    mediaLib Library Functions					 mlib_ImageMulAlpha(3MLIB)

NAME
mlib_ImageMulAlpha - alpha channel multiplication SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_ImageMulAlpha(mlib_image *dst, const mlib_image *src, mlib_s32 cmask); DESCRIPTION
The mlib_ImageMulAlpha() function multiplies color channels by the alpha channel on a pixel by pixel basis. For the MLIB_BYTE image, it uses the following equation: dst[x][y][c] = src[x][y][c] * src[x][y][a] * 2**(-8) For the MLIB_SHORT image, it uses the following equation: dst[x][y][c] = src[x][y][c] * src[x][y][a] * 2**(-15) For the MLIB_USHORT image, it uses the following equation: dst[x][y][c] = src[x][y][c] * src[x][y][a] * 2**(-16) For the MLIB_INT image, it uses the following equation: dst[x][y][c] = src[x][y][c] * src[x][y][a] * 2**(-31) where c and a are the indices for the color channels and the alpha channel, respectively, so c != a. PARAMETERS
The function takes the following arguments: dst Pointer to destination image. src Pointer to source image. cmask Channel mask to indicate the alpha channel. Each bit of the mask represents a channel in the image. The channel corresponding to the 1 bit of cmask is the alpha channel. 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 |Committed | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
mlib_ImageMulAlpha_Inp(3MLIB), mlib_ImageMulAlpha_Fp(3MLIB), mlib_ImageMulAlpha_Fp_Inp(3MLIB), attributes(5) SunOS 5.11 2 Mar 2007 mlib_ImageMulAlpha(3MLIB)

Featured Tech Videos