diff options
| author | rsc <devnull@localhost> | 2003-09-30 17:47:42 +0000 |
|---|---|---|
| committer | rsc <devnull@localhost> | 2003-09-30 17:47:42 +0000 |
| commit | ed7c8e8d02c02bdbff1e88a6d8d1419f39af48ad (patch) | |
| tree | ebcd32d20b0df2584bce713fefa87620ecd1cce7 /src/libdraw/rectclip.c | |
| parent | b2cfc4e2e71d0f0a5113ddfbd93c8285cc4d74e4 (diff) | |
| download | plan9port-ed7c8e8d02c02bdbff1e88a6d8d1419f39af48ad.tar.gz plan9port-ed7c8e8d02c02bdbff1e88a6d8d1419f39af48ad.tar.bz2 plan9port-ed7c8e8d02c02bdbff1e88a6d8d1419f39af48ad.zip | |
Initial import.
Diffstat (limited to 'src/libdraw/rectclip.c')
| -rw-r--r-- | src/libdraw/rectclip.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/libdraw/rectclip.c b/src/libdraw/rectclip.c new file mode 100644 index 00000000..2228628b --- /dev/null +++ b/src/libdraw/rectclip.c @@ -0,0 +1,25 @@ +#include <u.h> +#include <libc.h> +#include <draw.h> + +int +rectclip(Rectangle *rp, Rectangle b) /* first by reference, second by value */ +{ + Rectangle *bp = &b; + /* + * Expand rectXrect() in line for speed + */ + if((rp->min.x<bp->max.x && bp->min.x<rp->max.x && + rp->min.y<bp->max.y && bp->min.y<rp->max.y)==0) + return 0; + /* They must overlap */ + if(rp->min.x < bp->min.x) + rp->min.x = bp->min.x; + if(rp->min.y < bp->min.y) + rp->min.y = bp->min.y; + if(rp->max.x > bp->max.x) + rp->max.x = bp->max.x; + if(rp->max.y > bp->max.y) + rp->max.y = bp->max.y; + return 1; +} |