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);