xorg-server-1.4/mi/mifpoly.h

   1 /***********************************************************
   2
   3 Copyright 1987, 1998  The Open Group
   4
   5 Permission to use, copy, modify, distribute, and sell this software and its
   6 documentation for any purpose is hereby granted without fee, provided that
   7 the above copyright notice appear in all copies and that both that
   8 copyright notice and this permission notice appear in supporting
   9 documentation.
  10
  11 The above copyright notice and this permission notice shall be included in
  12 all copies or substantial portions of the Software.
  13
  14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20
  21 Except as contained in this notice, the name of The Open Group shall not be
  22 used in advertising or otherwise to promote the sale, use or other dealings
  23 in this Software without prior written authorization from The Open Group.
  24
  25
  26 Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
  27
  28                         All Rights Reserved
  29
  30 Permission to use, copy, modify, and distribute this software and its
  31 documentation for any purpose and without fee is hereby granted,
  32 provided that the above copyright notice appear in all copies and that
  33 both that copyright notice and this permission notice appear in
  34 supporting documentation, and that the name of Digital not be
  35 used in advertising or publicity pertaining to distribution of the
  36 software without specific, written prior permission.
  37
  38 DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  39 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  40 DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  41 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  42 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  43 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  44 SOFTWARE.
  45
  46 ******************************************************************/
  47
  48 #ifndef __MIFPOLY_H__
  49 #define __MIFPOLY_H__
  50
  51 #include <X11/Xfuncproto.h>
  52
  53 #define EPSILON 0.000001
  54 #define ISEQUAL(a,b) (Fabs((a) - (b)) <= EPSILON)
  55 #define UNEQUAL(a,b) (Fabs((a) - (b)) > EPSILON)
  56 #define WITHINHALF(a, b) (((a) - (b) > 0.0) ? (a) - (b) < 0.5 : \
  57                                              (b) - (a) <= 0.5)
  58 #define ROUNDTOINT(x)   ((int) (((x) > 0.0) ? ((x) + 0.5) : ((x) - 0.5)))
  59 #define ISZERO(x)       (Fabs((x)) <= EPSILON)
  60 #define PTISEQUAL(a,b) (ISEQUAL(a.x,b.x) && ISEQUAL(a.y,b.y))
  61 #define PTUNEQUAL(a,b) (UNEQUAL(a.x,b.x) || UNEQUAL(a.y,b.y))
  62 #define PtEqual(a, b) (((a).x == (b).x) && ((a).y == (b).y))
  63
  64 #define NotEnd          0
  65 #define FirstEnd        1
  66 #define SecondEnd       2
  67
  68 #define SQSECANT 108.856472512142 /* 1/sin^2(11/2) - for 11o miter cutoff */
  69 #define D2SECANT 5.21671526231167 /* 1/2*sin(11/2) - max extension per width */
  70
  71 static _X_INLINE int ICEIL(double x)
  72 {
  73     int _cTmp = x;
  74     return ((x == _cTmp) || (x < 0.0)) ? _cTmp : _cTmp+1;
  75 }
  76
  77 /* Point with sub-pixel positioning.  In this case we use doubles, but
  78  * see mifpolycon.c for other suggestions
  79  */
  80 typedef struct _SppPoint {
  81         double  x, y;
  82 } SppPointRec, *SppPointPtr;
  83
  84 typedef struct _SppArc {
  85         double  x, y, width, height;
  86         double  angle1, angle2;
  87 } SppArcRec, *SppArcPtr;
  88
  89 /* mifpolycon.c */
  90
  91 extern void miFillSppPoly(
  92     DrawablePtr /*dst*/,
  93     GCPtr /*pgc*/,
  94     int /*count*/,
  95     SppPointPtr /*ptsIn*/,
  96     int /*xTrans*/,
  97     int /*yTrans*/,
  98     double /*xFtrans*/,
  99     double /*yFtrans*/
 100 );
 101
 102 #endif /* __MIFPOLY_H__ */