render/mitri.c

   1 /*
   2  *
   3  * Copyright © 2002 Keith Packard, member of The XFree86 Project, Inc.
   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, and that the name of Keith Packard not be used in
  10  * advertising or publicity pertaining to distribution of the software without
  11  * specific, written prior permission.  Keith Packard makes no
  12  * representations about the suitability of this software for any purpose.  It
  13  * is provided "as is" without express or implied warranty.
  14  *
  15  * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  16  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  17  * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  18  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  19  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  20  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  21  * PERFORMANCE OF THIS SOFTWARE.
  22  */
  23
  24 #ifdef HAVE_DIX_CONFIG_H
  25 #include <dix-config.h>
  26 #endif
  27
  28 #include "scrnintstr.h"
  29 #include "gcstruct.h"
  30 #include "pixmapstr.h"
  31 #include "windowstr.h"
  32 #include "mi.h"
  33 #include "picturestr.h"
  34 #include "mipict.h"
  35
  36 void
  37 miPointFixedBounds(int npoint, xPointFixed * points, BoxPtr bounds)
  38 {
  39     bounds->x1 = xFixedToInt(points->x);
  40     bounds->x2 = xFixedToInt(xFixedCeil(points->x));
  41     bounds->y1 = xFixedToInt(points->y);
  42     bounds->y2 = xFixedToInt(xFixedCeil(points->y));
  43     points++;
  44     npoint--;
  45     while (npoint-- > 0) {
  46         INT16 x1 = xFixedToInt(points->x);
  47         INT16 x2 = xFixedToInt(xFixedCeil(points->x));
  48         INT16 y1 = xFixedToInt(points->y);
  49         INT16 y2 = xFixedToInt(xFixedCeil(points->y));
  50
  51         if (x1 < bounds->x1)
  52             bounds->x1 = x1;
  53         else if (x2 > bounds->x2)
  54             bounds->x2 = x2;
  55         if (y1 < bounds->y1)
  56             bounds->y1 = y1;
  57         else if (y2 > bounds->y2)
  58             bounds->y2 = y2;
  59         points++;
  60     }
  61 }
  62
  63 void
  64 miTriangleBounds(int ntri, xTriangle * tris, BoxPtr bounds)
  65 {
  66     miPointFixedBounds(ntri * 3, (xPointFixed *) tris, bounds);
  67 }