libvips/libsrc/mosaicing/merge.h

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2007-08-29 18:23:50 +02:00
/* Declarations for code shared between im_lrmerge() and im_tbmerge().
*/
/*
Copyright (C) 1991-2003 The National Gallery
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/* Number of entries in blend table. As a power of two as well, for >>ing.
*/
#define BLEND_SHIFT (10)
#define BLEND_SIZE (1<<BLEND_SHIFT)
/* How much we scale the int version up by.
*/
#define BLEND_SCALE (4096)
/* Keep state for each call in one of these.
*/
typedef struct _Overlapping {
IMAGE *ref; /* Arguments */
IMAGE *sec;
IMAGE *out;
int dx, dy;
int mwidth;
/* Ref and sec images, overlap, output area. We normalise these, so
* that the output image is always positioned at (0,0) - ie. all these
* coordinates are in output image space.
*/
Rect rarea;
Rect sarea;
Rect overlap;
Rect oarea;
int blsize; /* Max blend length */
int flsize; /* first/last cache size */
/* Sections of ref and sec which we use in output, excluding
* overlap area.
*/
Rect rpart;
Rect spart;
/* Overlap start/end cache
*/
GMutex *fl_lock; /* Need to lock on build */
int *first, *last;
/* Blend function.
*/
int (*blend)();
} Overlapping;
/* Keep per-thread state here.
*/
typedef struct _MergeInfo {
REGION *rir; /* Two input regions */
REGION *sir;
float *from1; /* IM_CODING_LABQ buffers */
float *from2;
float *merge;
} MergeInfo;
/* Functions shared between lr and tb.
*/
extern double *im__coef1;
extern double *im__coef2;
extern int *im__icoef1;
extern int *im__icoef2;
int im__make_blend_luts();
int im__attach_input( REGION *or, REGION *ir, Rect *area );
int im__copy_input( REGION *or, REGION *ir, Rect *area, Rect *reg );
Overlapping *im__build_mergestate( IMAGE *ref, IMAGE *sec, IMAGE *out,
int dx, int dy, int mwidth );
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void *im__start_merge( IMAGE *out, void *, void * );
int im__merge_gen( REGION *or, void *seq, void *a, void * );
int im__stop_merge( void *seq, void *, void * );
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int im__lrmerge( IMAGE *ref, IMAGE *sec, IMAGE *out,
int dx, int dy, int mwidth );
int im__tbmerge( IMAGE *ref, IMAGE *sec, IMAGE *out,
int dx, int dy, int mwidth );
int im__lrmerge1( IMAGE *ref, IMAGE *sec, IMAGE *out,
double a, double b, double dx, double dy,
int mwidth );
int im__tbmerge1( IMAGE *ref, IMAGE *sec, IMAGE *out,
double a, double b, double dx, double dy,
int mwidth );
/* similarity() stuff, used by mosaic1.
*/
int im__affine( IMAGE *in, IMAGE *out, Transformation *trn );