xorg-server-1.4/mi/mizerarc.h

   1 /************************************************************
   2
   3 Copyright 1989, 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
  27
  28 typedef struct {
  29     int x;
  30     int y;
  31     int mask;
  32 } miZeroArcPtRec;
  33
  34 typedef struct {
  35     int x, y, k1, k3, a, b, d, dx, dy;
  36     int alpha, beta;
  37     int xorg, yorg;
  38     int xorgo, yorgo;
  39     int w, h;
  40     int initialMask;
  41     miZeroArcPtRec start, altstart, end, altend;
  42     int firstx, firsty;
  43     int startAngle, endAngle;
  44 } miZeroArcRec;
  45
  46 #define miCanZeroArc(arc) (((arc)->width == (arc)->height) || \
  47                            (((arc)->width <= 800) && ((arc)->height <= 800)))
  48
  49 #define MIARCSETUP() \
  50     x = info.x; \
  51     y = info.y; \
  52     k1 = info.k1; \
  53     k3 = info.k3; \
  54     a = info.a; \
  55     b = info.b; \
  56     d = info.d; \
  57     dx = info.dx; \
  58     dy = info.dy
  59
  60 #define MIARCOCTANTSHIFT(clause) \
  61     if (a < 0) \
  62     { \
  63         if (y == info.h) \
  64         { \
  65             d = -1; \
  66             a = b = k1 = 0; \
  67         } \
  68         else \
  69         { \
  70             dx = (k1 << 1) - k3; \
  71             k1 = dx - k1; \
  72             k3 = -k3; \
  73             b = b + a - (k1 >> 1); \
  74             d = b + ((-a) >> 1) - d + (k3 >> 3); \
  75             if (dx < 0) \
  76                 a = -((-dx) >> 1) - a; \
  77             else \
  78                 a = (dx >> 1) - a; \
  79             dx = 0; \
  80             dy = 1; \
  81             clause \
  82         } \
  83     }
  84
  85 #define MIARCSTEP(move1,move2) \
  86     b -= k1; \
  87     if (d < 0) \
  88     { \
  89         x += dx; \
  90         y += dy; \
  91         a += k1; \
  92         d += b; \
  93         move1 \
  94     } \
  95     else \
  96     { \
  97         x++; \
  98         y++; \
  99         a += k3; \
 100         d -= a; \
 101         move2 \
 102     }
 103
 104 #define MIARCCIRCLESTEP(clause) \
 105     b -= k1; \
 106     x++; \
 107     if (d < 0) \
 108     { \
 109         a += k1; \
 110         d += b; \
 111     } \
 112     else \
 113     { \
 114         y++; \
 115         a += k3; \
 116         d -= a; \
 117         clause \
 118     }
 119
 120 /* mizerarc.c */
 121
 122 extern Bool miZeroArcSetup(
 123     xArc * /*arc*/,
 124     miZeroArcRec * /*info*/,
 125     Bool /*ok360*/
 126 );