1mlib_ImageBlend2_Fp_Inp(3MLmIeBd)iaLib Library Functimolnisb_ImageBlend2_Fp_Inp(3MLIB)
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NAME

6       mlib_ImageBlend2_Fp_Inp - blend with an alpha image
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SYNOPSIS

9       cc [ flag... ] file... -lmlib [ library... ]
10       #include <mlib.h>
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12       mlib_status mlib_ImageBlend2_Fp_Inp(mlib_image *src2dst,
13            const mlib_image *src1, const mlib_image *alpha);
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DESCRIPTION

17       The  mlib_ImageBlend2_Fp_Inp()  function blends two images together, in
18       place, on a pixel-by-pixel basis using an alpha image, when a  is  also
19       on a pixel basis. The alpha image can be a single-channel image or have
20       the same number of channels as the source and destination images.
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23       It uses the following equation when the alpha image is a single-channel
24       image:
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26         src2dst[x][y][i] = alpha[x][y][0]*src1[x][y][i] +
27                            (1 - alpha[x][y][0])*src2dst[x][y][i]
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31       It uses the following equation when the alpha image has the same number
32       of channels as the source and destination images:
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34         src2dst[x][y][i] = alpha[x][y][i]*src1[x][y][i] +
35                            (1 - alpha[x][y][i])*src2dst[x][y][i]
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39       It uses the following equation:
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PARAMETERS

45       The function takes the following arguments:
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47       src2dst    Pointer to second source and destination image.
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50       src1       Pointer to first source image.
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53       alpha      Alpha image used to control blending.  The  pixels  in  this
54                  image should have values in the range of [0.0, 1.0].
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RETURN VALUES

58       The  function  returns MLIB_SUCCESS if successful. Otherwise it returns
59       MLIB_FAILURE.
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ATTRIBUTES

62       See attributes(5) for descriptions of the following attributes:
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67       ┌─────────────────────────────┬─────────────────────────────┐
68       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
69       ├─────────────────────────────┼─────────────────────────────┤
70       │Interface Stability          │Committed                    │
71       ├─────────────────────────────┼─────────────────────────────┤
72       │MT-Level                     │MT-Safe                      │
73       └─────────────────────────────┴─────────────────────────────┘
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SEE ALSO

76       mlib_ImageBlend(3MLIB),     mlib_ImageBlend_Fp(3MLIB),      mlib_Image‐
77       Blend1_Fp_Inp(3MLIB),      mlib_ImageBlend1_Inp(3MLIB),     mlib_Image‐
78       Blend2_Inp(3MLIB), attributes(5)
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82SunOS 5.11                        2 Mar 2007    mlib_ImageBlend2_Fp_Inp(3MLIB)
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