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 _X11_XREGION_H_ 49 #define _X11_XREGION_H_ 50 51 typedef struct { 52 short x1, x2, y1, y2; 53 } Box, BOX, BoxRec, *BoxPtr; 54 55 typedef struct { 56 short x, y, width, height; 57 }RECTANGLE, RectangleRec, *RectanglePtr; 58 59 #define TRUE 1 60 #define FALSE 0 61 #define MAXSHORT 32767 62 #define MINSHORT -MAXSHORT 63 #ifndef MAX 64 #define MAX(a,b) (((a) > (b)) ? (a) : (b)) 65 #endif 66 #ifndef MIN 67 #define MIN(a,b) (((a) < (b)) ? (a) : (b)) 68 #endif 69 70 71 /* 72 * clip region 73 */ 74 75 typedef struct _XRegion { 76 long size; 77 long numRects; 78 BOX *rects; 79 BOX extents; 80 } REGION; 81 82 /* Xutil.h contains the declaration: 83 * typedef struct _XRegion *Region; 84 */ 85 86 /* 1 if two BOXs overlap. 87 * 0 if two BOXs do not overlap. 88 * Remember, x2 and y2 are not in the region 89 */ 90 #define EXTENTCHECK(r1, r2) \ 91 ((r1)->x2 > (r2)->x1 && \ 92 (r1)->x1 < (r2)->x2 && \ 93 (r1)->y2 > (r2)->y1 && \ 94 (r1)->y1 < (r2)->y2) 95 96 /* 97 * update region extents 98 */ 99 #define EXTENTS(r,idRect){\ 100 if((r)->x1 < (idRect)->extents.x1)\ 101 (idRect)->extents.x1 = (r)->x1;\ 102 if((r)->y1 < (idRect)->extents.y1)\ 103 (idRect)->extents.y1 = (r)->y1;\ 104 if((r)->x2 > (idRect)->extents.x2)\ 105 (idRect)->extents.x2 = (r)->x2;\ 106 if((r)->y2 > (idRect)->extents.y2)\ 107 (idRect)->extents.y2 = (r)->y2;\ 108 } 109 110 /* 111 * Check to see if there is enough memory in the present region. 112 */ 113 #define MEMCHECK(reg, rect, firstrect){\ 114 if ((reg)->numRects >= ((reg)->size - 1)){\ 115 BoxPtr tmpRect = Xrealloc ((firstrect), \ 116 (2 * (sizeof(BOX)) * ((reg)->size))); \ 117 if (tmpRect == NULL) \ 118 return(0);\ 119 (firstrect) = tmpRect; \ 120 (reg)->size *= 2;\ 121 (rect) = &(firstrect)[(reg)->numRects];\ 122 }\ 123 } 124 125 /* this routine checks to see if the previous rectangle is the same 126 * or subsumes the new rectangle to add. 127 */ 128 129 #define CHECK_PREVIOUS(Reg, R, Rx1, Ry1, Rx2, Ry2)\ 130 (!(((Reg)->numRects > 0)&&\ 131 ((R-1)->y1 == (Ry1)) &&\ 132 ((R-1)->y2 == (Ry2)) &&\ 133 ((R-1)->x1 <= (Rx1)) &&\ 134 ((R-1)->x2 >= (Rx2)))) 135 136 /* add a rectangle to the given Region */ 137 #define ADDRECT(reg, r, rx1, ry1, rx2, ry2){\ 138 if (((rx1) < (rx2)) && ((ry1) < (ry2)) &&\ 139 CHECK_PREVIOUS((reg), (r), (rx1), (ry1), (rx2), (ry2))){\ 140 (r)->x1 = (rx1);\ 141 (r)->y1 = (ry1);\ 142 (r)->x2 = (rx2);\ 143 (r)->y2 = (ry2);\ 144 EXTENTS((r), (reg));\ 145 (reg)->numRects++;\ 146 (r)++;\ 147 }\ 148 } 149 150 151 152 /* add a rectangle to the given Region */ 153 #define ADDRECTNOX(reg, r, rx1, ry1, rx2, ry2){\ 154 if ((rx1 < rx2) && (ry1 < ry2) &&\ 155 CHECK_PREVIOUS((reg), (r), (rx1), (ry1), (rx2), (ry2))){\ 156 (r)->x1 = (rx1);\ 157 (r)->y1 = (ry1);\ 158 (r)->x2 = (rx2);\ 159 (r)->y2 = (ry2);\ 160 (reg)->numRects++;\ 161 (r)++;\ 162 }\ 163 } 164 165 #define EMPTY_REGION(pReg) pReg->numRects = 0 166 167 #define REGION_NOT_EMPTY(pReg) pReg->numRects 168 169 #define INBOX(r, x, y) \ 170 ( ( ((r).x2 > x)) && \ 171 ( ((r).x1 <= x)) && \ 172 ( ((r).y2 > y)) && \ 173 ( ((r).y1 <= y)) ) 174 175 /* 176 * number of points to buffer before sending them off 177 * to scanlines() : Must be an even number 178 */ 179 #define NUMPTSTOBUFFER 200 180 181 /* 182 * used to allocate buffers for points and link 183 * the buffers together 184 */ 185 typedef struct _POINTBLOCK { 186 XPoint pts[NUMPTSTOBUFFER]; 187 struct _POINTBLOCK *next; 188 } POINTBLOCK; 189 190 #endif /* _X11_XREGION_H_ */ 191