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stuff

This commit is contained in:
John Cupitt 2009-03-23 17:38:14 +00:00
parent 56573a82e8
commit 6f2e74de81
4 changed files with 18 additions and 8 deletions
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2
ChangeLog
View File

@ -6,6 +6,8 @@
- saner im_buildlut() behaviour
- added im_gauss_imask_sep()
- allow open of truncated images, but block pixel access
- revising rounding on im_affine*() coordinate transforms to make them more
stable
3/3/09 started 7.17.2
- im_magick2vips.c: allow funky bit depths, like 14 (thanks Mikkel)

7
TODO
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@ -1,3 +1,10 @@
- try
vips im_affinei_all ~/in.v ~/out.v bilinear 1.0928961748633881 0 0 1 0 0
where in.v is a 366 pixel wide image, and 1.092... is (400 / 366)
- mask subscript in Pythion seems to be broken
>>> from vipsCC import *

4
libsrc/resample/im_affine.c
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@ -231,9 +231,9 @@ affinei_gen( REGION *or, void *seq, void *a, void *b )
need.left += iarea->left;
need.top += iarea->top;
/* Add a border for interpolation.
/* Add a border for interpolation. Plus one for rounding errors.
*/
im_rect_marginadjust( &need, half_window_size );
im_rect_marginadjust( &need, half_window_size + 1 );
/* Clip against the size of (2).
*/

13
libsrc/resample/transform.c
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@ -181,7 +181,7 @@ typedef void (*transform_fn)( const Transformation *,
*/
static void
transform_rect( const Transformation *trn, transform_fn transform,
const Rect *in, /* In input space */
const Rect *in, /* In input space */
Rect *out ) /* In output space */
{
double x1, y1; /* Map corners */
@ -197,17 +197,18 @@ transform_rect( const Transformation *trn, transform_fn transform,
transform( trn, IM_RECT_RIGHT( in ), in->top, &x2, &y2 );
transform( trn, IM_RECT_RIGHT( in ), IM_RECT_BOTTOM( in ), &x4, &y4 );
/* Find bounding box for these four corners.
/* Find bounding box for these four corners. Round-to-nearest to try
* to stop rounding errors growing images.
*/
left = IM_MIN( x1, IM_MIN( x2, IM_MIN( x3, x4 ) ) );
right = IM_MAX( x1, IM_MAX( x2, IM_MAX( x3, x4 ) ) );
top = IM_MIN( y1, IM_MIN( y2, IM_MIN( y3, y4 ) ) );
bottom = IM_MAX( y1, IM_MAX( y2, IM_MAX( y3, y4 ) ) );
out->left = floor( left );
out->top = floor( top );
out->width = ceil( right ) - out->left;
out->height = ceil( bottom ) - out->top;
out->left = IM_RINT( left );
out->top = IM_RINT( top );
out->width = IM_RINT( right - left );
out->height = IM_RINT( bottom - top );
}
/* Given an area in the input image, calculate the bounding box for those