1 /*
2  * Copyright © 2007 Keith Packard
3  *
4  * Permission to use, copy, modify, distribute, and sell this software and its
5  * documentation for any purpose is hereby granted without fee, provided that
6  * the above copyright notice appear in all copies and that both that copyright
7  * notice and this permission notice appear in supporting documentation, and
8  * that the name of the copyright holders not be used in advertising or
9  * publicity pertaining to distribution of the software without specific,
10  * written prior permission.  The copyright holders make no representations
11  * about the suitability of this software for any purpose.  It is provided "as
12  * is" without express or implied warranty.
13  *
14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20  * OF THIS SOFTWARE.
21  */
22 
23 #ifndef _RRTRANSFORM_H_
24 #define _RRTRANSFORM_H_
25 
26 #include <X11/extensions/randr.h>
27 #include "picturestr.h"
28 
29 typedef struct _rrTransform RRTransformRec, *RRTransformPtr;
30 
31 struct _rrTransform {
32     PictTransform transform;
33     struct pict_f_transform f_transform;
34     struct pict_f_transform f_inverse;
35     PictFilterPtr filter;
36     xFixed *params;
37     int nparams;
38     int width;
39     int height;
40 };
41 
42 extern _X_EXPORT void
43  RRTransformInit(RRTransformPtr transform);
44 
45 extern _X_EXPORT void
46  RRTransformFini(RRTransformPtr transform);
47 
48 extern _X_EXPORT Bool
49  RRTransformEqual(RRTransformPtr a, RRTransformPtr b);
50 
51 extern _X_EXPORT Bool
52 
53 RRTransformSetFilter(RRTransformPtr dst,
54                      PictFilterPtr filter,
55                      xFixed * params, int nparams, int width, int height);
56 
57 extern _X_EXPORT Bool
58  RRTransformCopy(RRTransformPtr dst, RRTransformPtr src);
59 
60 /*
61  * Compute the complete transformation matrix including
62  * client-specified transform, rotation/reflection values and the crtc
63  * offset.
64  *
65  * Return TRUE if the resulting transform is not a simple translation.
66  */
67 extern _X_EXPORT Bool
68 
69 RRTransformCompute(int x,
70                    int y,
71                    int width,
72                    int height,
73                    Rotation rotation,
74                    RRTransformPtr rr_transform,
75                    PictTransformPtr transform,
76                    struct pict_f_transform *f_transform,
77                    struct pict_f_transform *f_inverse);
78 
79 #endif                          /* _RRTRANSFORM_H_ */
80