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| author | Rob Pike <robpike@gmail.com> | 2010-08-24 10:16:32 -0400 |
|---|---|---|
| committer | Russ Cox <rsc@swtch.com> | 2010-08-24 10:16:32 -0400 |
| commit | a208917e7a935c019095acd1acd8165f08a54b7a (patch) | |
| tree | 378b43ebb788aefc16a02af7fd6ab6fb64f9b0cd /src | |
| parent | a06877afa9b778570f599e0e8fa83347426fa0b9 (diff) | |
| download | plan9port-a208917e7a935c019095acd1acd8165f08a54b7a.tar.gz plan9port-a208917e7a935c019095acd1acd8165f08a54b7a.tar.bz2 plan9port-a208917e7a935c019095acd1acd8165f08a54b7a.zip | |
acme: fix rounding in rows computation
R=rsc
CC=codebot
http://codereview.appspot.com/2007045
Diffstat (limited to 'src')
| -rw-r--r-- | src/cmd/acme/rows.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/cmd/acme/rows.c b/src/cmd/acme/rows.c index 36e244b4..c57a41b0 100644 --- a/src/cmd/acme/rows.c +++ b/src/cmd/acme/rows.c @@ -102,12 +102,14 @@ rowadd(Row *row, Column *c, int x) void rowresize(Row *row, Rectangle r) { - int i, dx, odx; - Rectangle r1, r2; + int i, dx, odx, deltax; + Rectangle or, r1, r2; Column *c; dx = Dx(r); odx = Dx(row->r); + or = row->r; + deltax = r.min.x - or.min.x; row->r = r; r1 = r; r1.max.y = r1.min.y + font->height; @@ -121,10 +123,11 @@ rowresize(Row *row, Rectangle r) for(i=0; i<row->ncol; i++){ c = row->col[i]; r1.min.x = r1.max.x; + /* the test should not be necessary, but guarantee we don't lose a pixel */ if(i == row->ncol-1) r1.max.x = r.max.x; else - r1.max.x = r1.min.x+Dx(c->r)*dx/odx; + r1.max.x = (c->r.max.x-or.min.x)*Dx(r)/Dx(or) + deltax; if(i > 0){ r2 = r1; r2.max.x = r2.min.x+Border; |