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mlib_imageblend(3mlib) [opensolaris man page]

mlib_ImageBlend(3MLIB)					    mediaLib Library Functions					    mlib_ImageBlend(3MLIB)

NAME
mlib_ImageBlend - blend with an alpha image SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_ImageBlend(mlib_image *dst, const mlib_image *src1, const mlib_image *src2, const mlib_image *alpha); DESCRIPTION
The mlib_ImageBlend() function blends two images together on a pixel-by-pixel basis using an alpha image, when alpha is also on a pixel basis. The alpha image can be a single-channel image or have the same number of channels as the source and destination images. It uses the following equation when the alpha image is a single-channel image: dst[x][y][i] = a[x][y][0]*src1[x][y][i] + (1 - a[x][y][0])*src2[x][y][i] It uses the following equation when the alpha image has the same number of channels as the source and destination images: dst[x][y][i] = a[x][y][i]*src1[x][y][i] + (1 - a[x][y][i])*src2[x][y][i] PARAMETERS
The function takes the following arguments: dst Pointer to destination image. src1 Pointer to first source image. src2 Pointer to second source image. alpha Alpha image used to control blending. The a value equals (alpha * 2**(-8)) for MLIB_BYTE image, (alpha * 2**(-15)) for MLIB_SHORT image, (alpha * 2**(-16)) for MLIB_USHORT image, and (alpha * 2**(-31)) for MLIB_INT 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 |Committed | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
mlib_ImageBlend_Fp(3MLIB), mlib_ImageBlend1_Fp_Inp(3MLIB), mlib_ImageBlend1_Inp(3MLIB), mlib_ImageBlend2_Fp_Inp(3MLIB), mlib_Image- Blend2_Inp(3MLIB), attributes(5) SunOS 5.11 2 Mar 2007 mlib_ImageBlend(3MLIB)

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mlib_ImageBlend(3MLIB)					    mediaLib Library Functions					    mlib_ImageBlend(3MLIB)

NAME
mlib_ImageBlend - blend with an alpha image SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_ImageBlend(mlib_image *dst, const mlib_image *src1, const mlib_image *src2, const mlib_image *alpha); DESCRIPTION
The mlib_ImageBlend() function blends two images together on a pixel-by-pixel basis using an alpha image, when alpha is also on a pixel basis. The alpha image can be a single-channel image or have the same number of channels as the source and destination images. It uses the following equation when the alpha image is a single-channel image: dst[x][y][i] = a[x][y][0]*src1[x][y][i] + (1 - a[x][y][0])*src2[x][y][i] It uses the following equation when the alpha image has the same number of channels as the source and destination images: dst[x][y][i] = a[x][y][i]*src1[x][y][i] + (1 - a[x][y][i])*src2[x][y][i] PARAMETERS
The function takes the following arguments: dst Pointer to destination image. src1 Pointer to first source image. src2 Pointer to second source image. alpha Alpha image used to control blending. The a value equals (alpha * 2**(-8)) for MLIB_BYTE image, (alpha * 2**(-15)) for MLIB_SHORT image, (alpha * 2**(-16)) for MLIB_USHORT image, and (alpha * 2**(-31)) for MLIB_INT 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_ImageBlend_Fp(3MLIB), mlib_ImageBlend1_Fp_Inp(3MLIB), mlib_ImageBlend1_Inp(3MLIB), mlib_ImageBlend2_Fp_Inp(3MLIB), mlib_Image- Blend2_Inp(3MLIB), attributes(5) SunOS 5.10 10 Nov 2004 mlib_ImageBlend(3MLIB)

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