1mlib_ImageAffine_Fp(3MLIB)mediaLib Library Functionsmlib_ImageAffine_Fp(3MLIB)
2
3
4
6 mlib_ImageAffine_Fp - image affine transformation
7
9 cc [ flag... ] file... -lmlib [ library... ]
10 #include <mlib.h>
11
12 mlib_status mlib_ImageAffine_Fp(mlib_image *dst, const mlib_image *src,
13 const mlib_d64 *mtx, mlib_filter filter, mlib_edge edge);
14
15
17 The mlib_ImageAffine_Fp() function does affine transformation on a
18 floating-point image according to the following equation:
19
20 xd = a*xs + b*ys + tx
21 yd = c*xs + d*ys + ty
22
23
24
25 where a point with coordinates (xs, ys) in the source image is mapped
26 to a point with coordinates (xd, yd) in the destination image.
27
28
29 The data type of the images can be MLIB_FLOAT or MLIB_DOUBLE.
30
31
32 The width and height of the destination image can be different from the
33 width and height of the source image.
34
35
36 The center of the upper-left corner pixel of an image is located at
37 (0.5, 0.5).
38
40 The function takes the following arguments:
41
42 dst Pointer to destination image.
43
44
45 src Pointer to source image.
46
47
48 mtx Transformation matrix. mtx[0] holds a; mtx[1] holds b; mtx[2]
49 holds tx; mtx[3] holds c; mtx[4] holds d; mtx[5] holds ty.
50
51
52 filter Type of resampling filter. It can be one of the following:
53
54 MLIB_NEAREST
55 MLIB_BILINEAR
56 MLIB_BICUBIC
57 MLIB_BICUBIC2
58
59
60
61 edge Type of edge condition. It can be one of the following:
62
63 MLIB_EDGE_DST_NO_WRITE
64 MLIB_EDGE_DST_FILL_ZERO
65 MLIB_EDGE_OP_NEAREST
66 MLIB_EDGE_SRC_EXTEND
67 MLIB_EDGE_SRC_PADDED
68
69
70
72 The function returns MLIB_SUCCESS if successful. Otherwise it returns
73 MLIB_FAILURE.
74
76 See attributes(5) for descriptions of the following attributes:
77
78
79
80
81 ┌─────────────────────────────┬─────────────────────────────┐
82 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
83 ├─────────────────────────────┼─────────────────────────────┤
84 │Interface Stability │Committed │
85 ├─────────────────────────────┼─────────────────────────────┤
86 │MT-Level │MT-Safe │
87 └─────────────────────────────┴─────────────────────────────┘
88
90 mlib_ImageAffine(3MLIB), mlib_ImageAffineIndex(3MLIB),
91 mlib_ImageAffineTransform(3MLIB), mlib_ImageAffineTransform_Fp(3MLIB),
92 mlib_ImageAffineTransformIndex(3MLIB), mlib_ImageSetPaddings(3MLIB),
93 attributes(5)
94
95
96
97SunOS 5.11 2 Mar 2007 mlib_ImageAffine_Fp(3MLIB)