Diffstat (limited to 'core/multimedia/opieplayer/libflash/matrix.cc') (more/less context) (ignore whitespace changes)
-rw-r--r-- | core/multimedia/opieplayer/libflash/matrix.cc | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/core/multimedia/opieplayer/libflash/matrix.cc b/core/multimedia/opieplayer/libflash/matrix.cc new file mode 100644 index 0000000..0d8c82c --- a/dev/null +++ b/core/multimedia/opieplayer/libflash/matrix.cc | |||
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1 | ///////////////////////////////////////////////////////////// | ||
2 | // Flash Plugin and Player | ||
3 | // Copyright (C) 1998,1999 Olivier Debon | ||
4 | // | ||
5 | // This program is free software; you can redistribute it and/or | ||
6 | // modify it under the terms of the GNU General Public License | ||
7 | // as published by the Free Software Foundation; either version 2 | ||
8 | // of the License, or (at your option) any later version. | ||
9 | // | ||
10 | // This program is distributed in the hope that it will be useful, | ||
11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
13 | // GNU General Public License for more details. | ||
14 | // | ||
15 | // You should have received a copy of the GNU General Public License | ||
16 | // along with this program; if not, write to the Free Software | ||
17 | // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | ||
18 | // | ||
19 | /////////////////////////////////////////////////////////////// | ||
20 | // Author : Olivier Debon <odebon@club-internet.fr> | ||
21 | // | ||
22 | |||
23 | #include "matrix.h" | ||
24 | |||
25 | #ifdef RCSID | ||
26 | static char *rcsid = "$Id$"; | ||
27 | #endif | ||
28 | |||
29 | Matrix::Matrix() | ||
30 | { | ||
31 | a = 1.0; | ||
32 | d = 1.0; | ||
33 | b = c = 0.0; | ||
34 | tx = ty = 0; | ||
35 | } | ||
36 | |||
37 | Matrix Matrix::operator*(Matrix m) | ||
38 | { | ||
39 | Matrix mat; | ||
40 | |||
41 | mat.a = this->a * m.a + this->b * m.c; | ||
42 | mat.b = this->a * m.b + this->b * m.d; | ||
43 | mat.c = this->c * m.a + this->d * m.c; | ||
44 | mat.d = this->c * m.b + this->d * m.d; | ||
45 | |||
46 | mat.tx = this->getX(m.tx,m.ty); | ||
47 | mat.ty = this->getY(m.tx,m.ty); | ||
48 | |||
49 | return mat; | ||
50 | } | ||
51 | |||
52 | Matrix Matrix::invert() | ||
53 | { | ||
54 | Matrix mat; | ||
55 | float det; | ||
56 | |||
57 | det = a*d-b*c; | ||
58 | |||
59 | mat.a = d/det; | ||
60 | mat.b = -b/det; | ||
61 | mat.c = -c/det; | ||
62 | mat.d = a/det; | ||
63 | |||
64 | mat.tx = - (long)(mat.a * tx + mat.b * ty); | ||
65 | mat.ty = - (long)(mat.c * tx + mat.d * ty); | ||
66 | |||
67 | return mat; | ||
68 | } | ||