/*
 * Copyright © 2007 Keith Packard
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting documentation, and
 * that the name of the copyright holders not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  The copyright holders make no representations
 * about the suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */

#ifndef _RRTRANSFORM_H_
#define _RRTRANSFORM_H_

#include <X11/extensions/randr.h>
#include "picturestr.h"

typedef struct _rrTransform	RRTransformRec, *RRTransformPtr;

struct _rrTransform {
    PictTransform   transform;
    struct pict_f_transform f_transform;
    struct pict_f_transform f_inverse;
    PictFilterPtr   filter;
    xFixed	    *params;
    int		    nparams;
    int		    width;
    int		    height;
};

extern _X_EXPORT void
RRTransformInit (RRTransformPtr transform);

extern _X_EXPORT void
RRTransformFini (RRTransformPtr transform);

extern _X_EXPORT Bool
RRTransformEqual (RRTransformPtr a, RRTransformPtr b);

extern _X_EXPORT Bool
RRTransformSetFilter (RRTransformPtr	dst,
		      PictFilterPtr	filter,
		      xFixed		*params,
		      int		nparams,
		      int		width,
		      int		height);

extern _X_EXPORT Bool
RRTransformCopy (RRTransformPtr dst, RRTransformPtr src);

/*
 * Compute the complete transformation matrix including
 * client-specified transform, rotation/reflection values and the crtc 
 * offset.
 *
 * Return TRUE if the resulting transform is not a simple translation.
 */
extern _X_EXPORT Bool
RRTransformCompute (int			    x,
		    int			    y,
		    int			    width,
		    int			    height,
		    Rotation		    rotation,
		    RRTransformPtr	    rr_transform,

		    PictTransformPtr	    transform,
		    struct pict_f_transform *f_transform,
		    struct pict_f_transform *f_inverse);


#endif /* _RRTRANSFORM_H_ */
