4 * Copyright © 2000 Tuomas J. Lukka
6 * Permission to use, copy, modify, distribute, and sell this software and its
7 * documentation for any purpose is hereby granted without fee, provided that
8 * the above copyright notice appear in all copies and that both that
9 * copyright notice and this permission notice appear in supporting
10 * documentation, and that the name of Tuomas Lukka not be used in
11 * advertising or publicity pertaining to distribution of the software without
12 * specific, written prior permission. Tuomas Lukka makes no
13 * representations about the suitability of this software for any purpose. It
14 * is provided "as is" without express or implied warranty.
16 * TUOMAS LUKKA DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
17 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
18 * EVENT SHALL TUOMAS LUKKA BE LIABLE FOR ANY SPECIAL, INDIRECT OR
19 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
20 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
21 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
22 * PERFORMANCE OF THIS SOFTWARE.
30 const FcMatrix FcIdentityMatrix
= { 1, 0, 0, 1 };
33 FcMatrixCopy (const FcMatrix
*mat
)
38 r
= (FcMatrix
*) malloc (sizeof (*r
) );
41 FcMemAlloc (FC_MEM_MATRIX
, sizeof (FcMatrix
));
47 FcMatrixFree (FcMatrix
*mat
)
49 if (mat
!= &FcIdentityMatrix
)
51 FcMemFree (FC_MEM_MATRIX
, sizeof (FcMatrix
));
57 FcMatrixEqual (const FcMatrix
*mat1
, const FcMatrix
*mat2
)
59 if(mat1
== mat2
) return FcTrue
;
60 if(mat1
== 0 || mat2
== 0) return FcFalse
;
61 return mat1
->xx
== mat2
->xx
&&
62 mat1
->xy
== mat2
->xy
&&
63 mat1
->yx
== mat2
->yx
&&
68 FcMatrixMultiply (FcMatrix
*result
, const FcMatrix
*a
, const FcMatrix
*b
)
72 r
.xx
= a
->xx
* b
->xx
+ a
->xy
* b
->yx
;
73 r
.xy
= a
->xx
* b
->xy
+ a
->xy
* b
->yy
;
74 r
.yx
= a
->yx
* b
->xx
+ a
->yy
* b
->yx
;
75 r
.yy
= a
->yx
* b
->xy
+ a
->yy
* b
->yy
;
80 FcMatrixRotate (FcMatrix
*m
, double c
, double s
)
85 * X Coordinate system is upside down, swap to make
86 * rotations counterclockwise
92 FcMatrixMultiply (m
, &r
, m
);
96 FcMatrixScale (FcMatrix
*m
, double sx
, double sy
)
104 FcMatrixMultiply (m
, &r
, m
);
108 FcMatrixShear (FcMatrix
*m
, double sh
, double sv
)
116 FcMatrixMultiply (m
, &r
, m
);