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| author | Robin Watts <robin.watts@artifex.com> | 2016-05-27 19:14:07 +0100 |
|---|---|---|
| committer | Robin Watts <robin.watts@artifex.com> | 2016-05-29 10:11:36 +0100 |
| commit | 28a1ee7561ae92dd38023be94076e684eb7e9e59 (patch) | |
| tree | 80ffbc1c407e066cbd8bea196921339662232c6e /source/fitz/pixmap.c | |
| parent | 388e34e47dcf6132f63877d133d6d7679d1b8537 (diff) | |
| download | mupdf-28a1ee7561ae92dd38023be94076e684eb7e9e59.tar.xz | |
Tweak plotter code slightly for speed.
Use do {} while(--w) rather than while(w--) {} as this safes a
test each time around the loop.
Diffstat (limited to 'source/fitz/pixmap.c')
| -rw-r--r-- | source/fitz/pixmap.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/source/fitz/pixmap.c b/source/fitz/pixmap.c index e2564c98..0016c003 100644 --- a/source/fitz/pixmap.c +++ b/source/fitz/pixmap.c @@ -705,19 +705,15 @@ fz_alpha_from_gray(fz_context *ctx, fz_pixmap *gray, int luminosity) alpha = fz_new_pixmap_with_bbox(ctx, NULL, fz_pixmap_bbox(ctx, gray, &bbox), 1); dp = alpha->samples; - dstride = alpha->stride - alpha->w; + dstride = alpha->stride; sp = gray->samples; - sstride = gray->stride - gray->w; + sstride = gray->stride; h = gray->h; + w = gray->w; while (h--) { - w = gray->w; - while (w--) - { - *dp++ = sp[0]; - sp++; - } + memcpy(dp, sp, w); sp += sstride; dp += dstride; } |