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revise old comment

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This commit is contained in:
John Cupitt 2021-05-25 14:06:47 +01:00
parent fc8dbfdb44
commit dca526405e
1 changed files with 8 additions and 14 deletions
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22
libvips/conversion/zoom.c
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@ -52,20 +52,9 @@
*/ */
/* /*
* TODO: #define DEBUG
* Test for pixel size and use memcpy() on individual pixels once they reach #define DEBUG_VERBOSE
* sizes of the order of tens of bytes. char-wise copy is quicker than
* memcpy() for smaller pixels.
*
* Also, I haven't tested it but int-wise copying may be faster still, as
* long as alignment permits it.
*
* tcv. 2006-09-01
*/
/* Turn on ADDR() range checks.
#define DEBUG 1
*/ */
#ifdef HAVE_CONFIG_H #ifdef HAVE_CONFIG_H
@ -254,6 +243,11 @@ vips_zoom_gen( VipsRegion *or, void *seq, void *a, void *b, gboolean *stop )
int left, right, top, bottom; int left, right, top, bottom;
int width, height; int width, height;
#ifdef DEBUG_VERBOSE
printf( "vips_zoom_gen: left=%d, top=%d, width=%d, height=%d\n",
r->left, r->top, r->width, r->height );
#endif /*DEBUG_VERBOSE*/
/* Area of input we need. We have to round out, as we may have /* Area of input we need. We have to round out, as we may have
* part-pixels all around the edges. * part-pixels all around the edges.
*/ */