randr/rrtransform.h

   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_ */