mi/mipolyrect.c

   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 Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
  26
  27                         All Rights Reserved
  28
  29 Permission to use, copy, modify, and distribute this software and its
  30 documentation for any purpose and without fee is hereby granted,
  31 provided that the above copyright notice appear in all copies and that
  32 both that copyright notice and this permission notice appear in
  33 supporting documentation, and that the name of Digital not be
  34 used in advertising or publicity pertaining to distribution of the
  35 software without specific, written prior permission.
  36
  37 DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  38 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  39 DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  40 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  41 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  42 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  43 SOFTWARE.
  44
  45 ******************************************************************/
  46 #ifdef HAVE_DIX_CONFIG_H
  47 #include <dix-config.h>
  48 #endif
  49
  50 #include <X11/X.h>
  51 #include <X11/Xprotostr.h>
  52 #include "regionstr.h"
  53 #include "gcstruct.h"
  54 #include "pixmap.h"
  55 #include "mi.h"
  56
  57 void
  58 miPolyRectangle(DrawablePtr pDraw, GCPtr pGC, int nrects, xRectangle *pRects)
  59 {
  60     int i;
  61     xRectangle *pR = pRects;
  62     DDXPointRec rect[5];
  63     int bound_tmp;
  64
  65 #define MINBOUND(dst,eqn)       bound_tmp = eqn; \
  66                                 if (bound_tmp < -32768) \
  67                                     bound_tmp = -32768; \
  68                                 dst = bound_tmp;
  69
  70 #define MAXBOUND(dst,eqn)       bound_tmp = eqn; \
  71                                 if (bound_tmp > 32767) \
  72                                     bound_tmp = 32767; \
  73                                 dst = bound_tmp;
  74
  75 #define MAXUBOUND(dst,eqn)      bound_tmp = eqn; \
  76                                 if (bound_tmp > 65535) \
  77                                     bound_tmp = 65535; \
  78                                 dst = bound_tmp;
  79
  80     if (pGC->lineStyle == LineSolid && pGC->joinStyle == JoinMiter &&
  81         pGC->lineWidth != 0) {
  82         xRectangle *tmp, *t;
  83         int ntmp;
  84         int offset1, offset2, offset3;
  85         int x, y, width, height;
  86
  87         ntmp = (nrects << 2);
  88         offset2 = pGC->lineWidth;
  89         offset1 = offset2 >> 1;
  90         offset3 = offset2 - offset1;
  91         tmp = malloc(ntmp * sizeof(xRectangle));
  92         if (!tmp)
  93             return;
  94         t = tmp;
  95         for (i = 0; i < nrects; i++) {
  96             x = pR->x;
  97             y = pR->y;
  98             width = pR->width;
  99             height = pR->height;
 100             pR++;
 101             if (width == 0 && height == 0) {
 102                 rect[0].x = x;
 103                 rect[0].y = y;
 104                 rect[1].x = x;
 105                 rect[1].y = y;
 106                 (*pGC->ops->Polylines) (pDraw, pGC, CoordModeOrigin, 2, rect);
 107             }
 108             else if (height < offset2 || width < offset1) {
 109                 if (height == 0) {
 110                     t->x = x;
 111                     t->width = width;
 112                 }
 113                 else {
 114                     MINBOUND(t->x, x - offset1)
 115                         MAXUBOUND(t->width, width + offset2)
 116                 }
 117                 if (width == 0) {
 118                     t->y = y;
 119                     t->height = height;
 120                 }
 121                 else {
 122                     MINBOUND(t->y, y - offset1)
 123                         MAXUBOUND(t->height, height + offset2)
 124                 }
 125                 t++;
 126             }
 127             else {
 128                 MINBOUND(t->x, x - offset1)
 129                     MINBOUND(t->y, y - offset1)
 130                     MAXUBOUND(t->width, width + offset2)
 131                     t->height = offset2;
 132                 t++;
 133                 MINBOUND(t->x, x - offset1)
 134                     MAXBOUND(t->y, y + offset3);
 135                 t->width = offset2;
 136                 t->height = height - offset2;
 137                 t++;
 138                 MAXBOUND(t->x, x + width - offset1);
 139                 MAXBOUND(t->y, y + offset3)
 140                     t->width = offset2;
 141                 t->height = height - offset2;
 142                 t++;
 143                 MINBOUND(t->x, x - offset1)
 144                     MAXBOUND(t->y, y + height - offset1)
 145                     MAXUBOUND(t->width, width + offset2)
 146                     t->height = offset2;
 147                 t++;
 148             }
 149         }
 150         (*pGC->ops->PolyFillRect) (pDraw, pGC, t - tmp, tmp);
 151         free((pointer) tmp);
 152     }
 153     else {
 154
 155         for (i = 0; i < nrects; i++) {
 156             rect[0].x = pR->x;
 157             rect[0].y = pR->y;
 158
 159             MAXBOUND(rect[1].x, pR->x + (int) pR->width)
 160                 rect[1].y = rect[0].y;
 161
 162             rect[2].x = rect[1].x;
 163             MAXBOUND(rect[2].y, pR->y + (int) pR->height);
 164
 165             rect[3].x = rect[0].x;
 166             rect[3].y = rect[2].y;
 167
 168             rect[4].x = rect[0].x;
 169             rect[4].y = rect[0].y;
 170
 171             (*pGC->ops->Polylines) (pDraw, pGC, CoordModeOrigin, 5, rect);
 172             pR++;
 173         }
 174     }
 175 }