ioncore/rectangle.c

   1 /*
   2  * ion/ioncore/rectangle.c
   3  *
   4  * Copyright (c) Tuomo Valkonen 1999-2009.
   5  *
   6  * See the included file LICENSE for details.
   7  */
   8
   9 #include <libtu/minmax.h>
  10 #include <libextl/extl.h>
  11
  12 #include "common.h"
  13 #include "rectangle.h"
  14
  15
  16 void rectangle_constrain(WRectangle *g, const WRectangle *bounds)
  17 {
  18     const WRectangle tmpg=*g;
  19
  20     g->x=minof(maxof(tmpg.x, bounds->x), tmpg.x+tmpg.w-1);
  21     g->y=minof(maxof(tmpg.y, bounds->y), tmpg.y+tmpg.h-1);
  22     g->w=maxof(1, minof(bounds->x+bounds->w, tmpg.x+tmpg.w)-g->x);
  23     g->h=maxof(1, minof(bounds->y+bounds->h, tmpg.y+tmpg.h)-g->y);
  24 }
  25
  26
  27 bool rectangle_contains(const WRectangle *g, int x, int y)
  28 {
  29     return (x>=g->x && x<g->x+g->w && y>=g->y && y<g->y+g->h);
  30 }
  31
  32
  33 void rectangle_debugprint(const WRectangle *g, const char *n)
  34 {
  35     fprintf(stderr, "%s %d, %d; %d, %d\n", n, g->x, g->y, g->w, g->h);
  36 }
  37
  38
  39 int rectangle_compare(const WRectangle *g, const WRectangle *h)
  40 {
  41     return ((g->x!=h->x ? RECTANGLE_X_DIFF : 0) |
  42             (g->y!=h->y ? RECTANGLE_Y_DIFF : 0) |
  43             (g->w!=h->w ? RECTANGLE_W_DIFF : 0) |
  44             (g->h!=h->h ? RECTANGLE_H_DIFF : 0));
  45 }