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| author | Petter Rodhelind <petter.rodhelind@gmail.com> | 2020-01-14 11:41:08 +0100 |
|---|---|---|
| committer | Petter Rodhelind <petter.rodhelind@gmail.com> | 2020-01-14 11:41:08 +0100 |
| commit | 02d7aa8915f9c3a3288dab01f321eb94ba219e3b (patch) | |
| tree | f053238978479e408a2b83571443e132f30586ab /src/cmd/page/rotate.c | |
| parent | c0c9d8f883dfd3a7f5a74499d91bb95884b15873 (diff) | |
| parent | 3d1382b98a502d0c34d5ba2c462396acc515016e (diff) | |
| download | plan9port-02d7aa8915f9c3a3288dab01f321eb94ba219e3b.tar.gz plan9port-02d7aa8915f9c3a3288dab01f321eb94ba219e3b.tar.bz2 plan9port-02d7aa8915f9c3a3288dab01f321eb94ba219e3b.zip | |
Merge remote-tracking branch 'upstream/master'
Diffstat (limited to 'src/cmd/page/rotate.c')
| -rw-r--r-- | src/cmd/page/rotate.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/src/cmd/page/rotate.c b/src/cmd/page/rotate.c index 3ac83a1f..2c6ea520 100644 --- a/src/cmd/page/rotate.c +++ b/src/cmd/page/rotate.c @@ -1,12 +1,12 @@ /* * rotate an image 180° in O(log Dx + log Dy) /dev/draw writes, * using an extra buffer same size as the image. - * + * * the basic concept is that you can invert an array by inverting * the top half, inverting the bottom half, and then swapping them. * the code does this slightly backwards to ensure O(log n) runtime. * (If you do it wrong, you can get O(log² n) runtime.) - * + * * This is usually overkill, but it speeds up slow remote * connections quite a bit. */ @@ -37,7 +37,7 @@ writefile(char *name, Image *im, int gran) snprint(buf, sizeof buf, "%d%s%d", c++, name, gran); fd = create(buf, OWRITE, 0666); if(fd < 0) - return; + return; writeimage(fd, im, 0); close(fd); } @@ -109,7 +109,7 @@ interlace(Image *im, Image *tmp, int axis, int n, Image *mask, int gran) /* * Halve the grating period in the mask. - * The grating currently looks like + * The grating currently looks like * ####____####____####____####____ * where #### is opacity. * @@ -117,7 +117,7 @@ interlace(Image *im, Image *tmp, int axis, int n, Image *mask, int gran) * ##__##__##__##__##__##__##__##__ * which is achieved by shifting the mask * and drawing on itself through itself. - * Draw doesn't actually allow this, so + * Draw doesn't actually allow this, so * we have to copy it first. * * ####____####____####____####____ (dst) @@ -151,7 +151,7 @@ shuffle(Image *im, Image *tmp, int axis, int n, Image *mask, int gran, interlace(im, tmp, axis, nn, mask, gran); // writefile("interlace", im, gran); - + gran = nextmask(mask, axis, gran); shuffle(im, tmp, axis, n, mask, gran, nn); // writefile("shuffle", im, gran); @@ -288,7 +288,7 @@ fac(int L) return f; } -/* +/* * i0(x) is the modified Bessel function, Σ (x/2)^2L / (L!)² * There are faster ways to calculate this, but we precompute * into a table so let's keep it simple. |