sergiotarxz/libvips
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vips_resize() is always centre convention

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it was corner for downsize, but should be centre to match imagemagick
This commit is contained in:
John Cupitt 2017-11-26 15:24:40 +00:00
parent 3754ddb947
commit 406e228c9b
2 changed files with 5 additions and 3 deletions
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2
ChangeLog
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@ -39,7 +39,7 @@
- fix nasty jaggies on the edges of affine output, thanks chregu - fix nasty jaggies on the edges of affine output, thanks chregu
- add gif-delay, gif-comment and gif-loop metadata - add gif-delay, gif-comment and gif-loop metadata
- add dispose handling to gifload - add dispose handling to gifload
- deprecate the "centre" option for vips_resize(): it's now automatic - deprecate the "centre" option for vips_resize(): it's now always on
29/8/17 started 8.5.9 29/8/17 started 8.5.9
- make --fail stop jpeg read on any libjpeg warning, thanks @mceachen - make --fail stop jpeg read on any libjpeg warning, thanks @mceachen

6
libvips/resample/resize.c
View File

@ -27,7 +27,7 @@
* 15/10/17 * 15/10/17
* - make LINEAR and CUBIC adaptive * - make LINEAR and CUBIC adaptive
* 25/11/17 * 25/11/17
* - deprecate --centre ... it's now automatic, thanks tback * - deprecate --centre ... it's now always on, thanks tback
*/ */
/* /*
@ -215,6 +215,7 @@ vips_resize_build( VipsObject *object )
g_info( "residual reducev by %g", vscale ); g_info( "residual reducev by %g", vscale );
if( vips_reducev( in, &t[2], 1.0 / vscale, if( vips_reducev( in, &t[2], 1.0 / vscale,
"kernel", resize->kernel, "kernel", resize->kernel,
"centre", TRUE,
NULL ) ) NULL ) )
return( -1 ); return( -1 );
in = t[2]; in = t[2];
@ -225,6 +226,7 @@ vips_resize_build( VipsObject *object )
hscale ); hscale );
if( vips_reduceh( in, &t[3], 1.0 / hscale, if( vips_reduceh( in, &t[3], 1.0 / hscale,
"kernel", resize->kernel, "kernel", resize->kernel,
"centre", TRUE,
NULL ) ) NULL ) )
return( -1 ); return( -1 );
in = t[3]; in = t[3];
@ -397,7 +399,7 @@ vips_resize_init( VipsResize *resize )
* then the image is shrunk again to the * then the image is shrunk again to the
* target size with vips_reduce(). How much is done by vips_shrink() vs. * target size with vips_reduce(). How much is done by vips_shrink() vs.
* vips_reduce() varies with the @kernel setting. Downsizing is done with * vips_reduce() varies with the @kernel setting. Downsizing is done with
* corner convention. * centre convention.
* *
* vips_resize() normally uses #VIPS_KERNEL_LANCZOS3 for the final reduce, you * vips_resize() normally uses #VIPS_KERNEL_LANCZOS3 for the final reduce, you
* can change this with @kernel. * can change this with @kernel.