mifillarc.h (4445B)
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 #ifndef __MIFILLARC_H__ 28 #define __MIFILLARC_H__ 29 30 #define FULLCIRCLE (360 * 64) 31 32 typedef struct _miFillArc { 33 int xorg, yorg; 34 int y; 35 int dx, dy; 36 int e; 37 int ym, yk, xm, xk; 38 } miFillArcRec; 39 40 /* could use 64-bit integers */ 41 typedef struct _miFillArcD { 42 int xorg, yorg; 43 int y; 44 int dx, dy; 45 double e; 46 double ym, yk, xm, xk; 47 } miFillArcDRec; 48 49 #define miFillArcEmpty(arc) (!(arc)->angle2 || \ 50 !(arc)->width || !(arc)->height || \ 51 (((arc)->width == 1) && ((arc)->height & 1))) 52 53 #define miCanFillArc(arc) (((arc)->width == (arc)->height) || \ 54 (((arc)->width <= 800) && ((arc)->height <= 800))) 55 56 #define MIFILLARCSETUP() \ 57 x = 0; \ 58 y = info.y; \ 59 e = info.e; \ 60 xk = info.xk; \ 61 xm = info.xm; \ 62 yk = info.yk; \ 63 ym = info.ym; \ 64 dx = info.dx; \ 65 dy = info.dy; \ 66 xorg = info.xorg; \ 67 yorg = info.yorg 68 69 #define MIFILLARCSTEP(slw) \ 70 e += yk; \ 71 while (e >= 0) \ 72 { \ 73 x++; \ 74 xk -= xm; \ 75 e += xk; \ 76 } \ 77 y--; \ 78 yk -= ym; \ 79 slw = (x << 1) + dx; \ 80 if ((e == xk) && (slw > 1)) \ 81 slw-- 82 83 #define MIFILLCIRCSTEP(slw) MIFILLARCSTEP(slw) 84 #define MIFILLELLSTEP(slw) MIFILLARCSTEP(slw) 85 86 #define miFillArcLower(slw) (((y + dy) != 0) && ((slw > 1) || (e != xk))) 87 88 typedef struct _miSliceEdge { 89 int x; 90 int stepx; 91 int deltax; 92 int e; 93 int dy; 94 int dx; 95 } miSliceEdgeRec, *miSliceEdgePtr; 96 97 typedef struct _miArcSlice { 98 miSliceEdgeRec edge1, edge2; 99 int min_top_y, max_top_y; 100 int min_bot_y, max_bot_y; 101 Bool edge1_top, edge2_top; 102 Bool flip_top, flip_bot; 103 } miArcSliceRec; 104 105 #define MIARCSLICESTEP(edge) \ 106 edge.x -= edge.stepx; \ 107 edge.e -= edge.dx; \ 108 if (edge.e <= 0) \ 109 { \ 110 edge.x -= edge.deltax; \ 111 edge.e += edge.dy; \ 112 } 113 114 #define miFillSliceUpper(slice) \ 115 ((y >= slice.min_top_y) && (y <= slice.max_top_y)) 116 117 #define miFillSliceLower(slice) \ 118 ((y >= slice.min_bot_y) && (y <= slice.max_bot_y)) 119 120 #define MIARCSLICEUPPER(xl,xr,slice,slw) \ 121 xl = xorg - x; \ 122 xr = xl + slw - 1; \ 123 if (slice.edge1_top && (slice.edge1.x < xr)) \ 124 xr = slice.edge1.x; \ 125 if (slice.edge2_top && (slice.edge2.x > xl)) \ 126 xl = slice.edge2.x; 127 128 #define MIARCSLICELOWER(xl,xr,slice,slw) \ 129 xl = xorg - x; \ 130 xr = xl + slw - 1; \ 131 if (!slice.edge1_top && (slice.edge1.x > xl)) \ 132 xl = slice.edge1.x; \ 133 if (!slice.edge2_top && (slice.edge2.x < xr)) \ 134 xr = slice.edge2.x; 135 136 #define MIWIDEARCSETUP(x,y,dy,slw,e,xk,xm,yk,ym) \ 137 x = 0; \ 138 y = slw >> 1; \ 139 yk = y << 3; \ 140 xm = 8; \ 141 ym = 8; \ 142 if (dy) \ 143 { \ 144 xk = 0; \ 145 if (slw & 1) \ 146 e = -1; \ 147 else \ 148 e = -(y << 2) - 2; \ 149 } \ 150 else \ 151 { \ 152 y++; \ 153 yk += 4; \ 154 xk = -4; \ 155 if (slw & 1) \ 156 e = -(y << 2) - 3; \ 157 else \ 158 e = - (y << 3); \ 159 } 160 161 #define MIFILLINARCSTEP(slw) \ 162 ine += inyk; \ 163 while (ine >= 0) \ 164 { \ 165 inx++; \ 166 inxk -= inxm; \ 167 ine += inxk; \ 168 } \ 169 iny--; \ 170 inyk -= inym; \ 171 slw = (inx << 1) + dx; \ 172 if ((ine == inxk) && (slw > 1)) \ 173 slw-- 174 175 #define miFillInArcLower(slw) (((iny + dy) != 0) && \ 176 ((slw > 1) || (ine != inxk))) 177 178 #endif /* __MIFILLARC_H__ */