239 lines
6.4 KiB
C
239 lines
6.4 KiB
C
/* Definitions for partial image regions.
|
|
*
|
|
* J.Cupitt, 8/4/93
|
|
*
|
|
* 2/3/11
|
|
* - move to GObject
|
|
*/
|
|
|
|
/*
|
|
|
|
This file is part of VIPS.
|
|
|
|
VIPS 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., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA
|
|
|
|
*/
|
|
|
|
/*
|
|
|
|
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
|
|
|
|
*/
|
|
|
|
#ifndef VIPS_REGION_H
|
|
#define VIPS_REGION_H
|
|
|
|
#include <glib.h>
|
|
#include <glib-object.h>
|
|
#include <vips/object.h>
|
|
#include <vips/image.h>
|
|
#include <vips/rect.h>
|
|
#include <vips/private.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif /*__cplusplus*/
|
|
|
|
#define VIPS_TYPE_REGION (vips_region_get_type())
|
|
#define VIPS_REGION(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_CAST((obj), \
|
|
VIPS_TYPE_REGION, VipsRegion))
|
|
#define VIPS_REGION_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_CAST((klass), \
|
|
VIPS_TYPE_REGION, VipsRegionClass))
|
|
#define VIPS_IS_REGION(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_TYPE((obj), VIPS_TYPE_REGION))
|
|
#define VIPS_IS_REGION_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_TYPE((klass), VIPS_TYPE_REGION))
|
|
#define VIPS_REGION_GET_CLASS(obj) \
|
|
(G_TYPE_INSTANCE_GET_CLASS((obj), \
|
|
VIPS_TYPE_REGION, VipsRegionClass))
|
|
|
|
/**
|
|
* VipsRegionShrink:
|
|
* @VIPS_REGION_SHRINK_MEAN: use the average
|
|
* @VIPS_REGION_SHRINK_MEDIAN: use the median
|
|
* @VIPS_REGION_SHRINK_MODE: use the mode
|
|
* @VIPS_REGION_SHRINK_MAX: use the maximum
|
|
* @VIPS_REGION_SHRINK_MIN: use the minimum
|
|
* @VIPS_REGION_SHRINK_NEAREST: use the top-left pixel
|
|
*
|
|
* How to calculate the output pixels when shrinking a 2x2 region.
|
|
*/
|
|
typedef enum {
|
|
VIPS_REGION_SHRINK_MEAN,
|
|
VIPS_REGION_SHRINK_MEDIAN,
|
|
VIPS_REGION_SHRINK_MODE,
|
|
VIPS_REGION_SHRINK_MAX,
|
|
VIPS_REGION_SHRINK_MIN,
|
|
VIPS_REGION_SHRINK_NEAREST,
|
|
VIPS_REGION_SHRINK_LAST
|
|
} VipsRegionShrink;
|
|
|
|
/* Sub-area of image.
|
|
*
|
|
* Matching typedef in basic.h.
|
|
*/
|
|
struct _VipsRegion {
|
|
VipsObject parent_object;
|
|
|
|
/*< public >*/
|
|
/* Users may read these two fields.
|
|
*/
|
|
VipsImage *im; /* Link back to parent image */
|
|
VipsRect valid; /* Area of parent we can see */
|
|
|
|
/* The rest of VipsRegion is private.
|
|
*/
|
|
/*< private >*/
|
|
RegionType type; /* What kind of attachment */
|
|
VipsPel *data; /* Off here to get data */
|
|
int bpl; /* Bytes-per-line for data */
|
|
void *seq; /* Sequence we are using to fill region */
|
|
|
|
/* The thread that made this region. Used to assert() test that
|
|
* regions are not being shared between threads.
|
|
*/
|
|
GThread *thread;
|
|
|
|
/* Ref to the window we use for this region, if any.
|
|
*/
|
|
VipsWindow *window;
|
|
|
|
/* Ref to the buffer we use for this region, if any.
|
|
*/
|
|
VipsBuffer *buffer;
|
|
|
|
/* The image this region is on has changed and caches need to be
|
|
* dropped.
|
|
*/
|
|
gboolean invalid;
|
|
};
|
|
|
|
typedef struct _VipsRegionClass {
|
|
VipsObjectClass parent_class;
|
|
|
|
} VipsRegionClass;
|
|
|
|
/* Don't put spaces around void here, it breaks gtk-doc.
|
|
*/
|
|
VIPS_API
|
|
GType vips_region_get_type(void);
|
|
|
|
VIPS_API
|
|
VipsRegion *vips_region_new(VipsImage *image);
|
|
|
|
VIPS_API
|
|
int vips_region_buffer(VipsRegion *reg, const VipsRect *r);
|
|
VIPS_API
|
|
int vips_region_image(VipsRegion *reg, const VipsRect *r);
|
|
VIPS_API
|
|
int vips_region_region(VipsRegion *reg, VipsRegion *dest,
|
|
const VipsRect *r, int x, int y);
|
|
VIPS_API
|
|
int vips_region_equalsregion(VipsRegion *reg1, VipsRegion *reg2);
|
|
VIPS_API
|
|
int vips_region_position(VipsRegion *reg, int x, int y);
|
|
|
|
VIPS_API
|
|
void vips_region_paint(VipsRegion *reg, const VipsRect *r, int value);
|
|
VIPS_API
|
|
void vips_region_paint_pel(VipsRegion *reg,
|
|
const VipsRect *r, const VipsPel *ink);
|
|
VIPS_API
|
|
void vips_region_black(VipsRegion *reg);
|
|
VIPS_API
|
|
void vips_region_copy(VipsRegion *reg, VipsRegion *dest,
|
|
const VipsRect *r, int x, int y);
|
|
VIPS_API
|
|
int vips_region_shrink_method(VipsRegion *from, VipsRegion *to,
|
|
const VipsRect *target, VipsRegionShrink method);
|
|
VIPS_API
|
|
int vips_region_shrink(VipsRegion *from, VipsRegion *to,
|
|
const VipsRect *target);
|
|
|
|
VIPS_API
|
|
int vips_region_prepare(VipsRegion *reg, const VipsRect *r);
|
|
VIPS_API
|
|
int vips_region_prepare_to(VipsRegion *reg,
|
|
VipsRegion *dest, const VipsRect *r, int x, int y);
|
|
|
|
VIPS_API
|
|
VipsPel *vips_region_fetch(VipsRegion *region,
|
|
int left, int top, int width, int height, size_t *len);
|
|
VIPS_API
|
|
int vips_region_width(VipsRegion *region);
|
|
VIPS_API
|
|
int vips_region_height(VipsRegion *region);
|
|
|
|
VIPS_API
|
|
void vips_region_invalidate(VipsRegion *reg);
|
|
|
|
/* Use this to count pixels passing through key points. Handy for spotting bad
|
|
* overcomputation.
|
|
*/
|
|
#ifdef DEBUG_LEAK
|
|
#define VIPS_COUNT_PIXELS(R, N) vips__region_count_pixels(R, N)
|
|
#else /*!DEBUG_LEAK*/
|
|
#define VIPS_COUNT_PIXELS(R, N)
|
|
#endif /*DEBUG_LEAK*/
|
|
|
|
#define VIPS_REGION_LSKIP(R) \
|
|
((size_t) ((R)->bpl))
|
|
#define VIPS_REGION_N_ELEMENTS(R) \
|
|
((size_t) ((R)->valid.width * (R)->im->Bands))
|
|
#define VIPS_REGION_SIZEOF_ELEMENT(R) \
|
|
(VIPS_IMAGE_SIZEOF_ELEMENT((R)->im))
|
|
#define VIPS_REGION_SIZEOF_PEL(R) \
|
|
(VIPS_IMAGE_SIZEOF_PEL((R)->im))
|
|
#define VIPS_REGION_SIZEOF_LINE(R) \
|
|
((size_t) ((R)->valid.width * VIPS_REGION_SIZEOF_PEL(R)))
|
|
|
|
/* If DEBUG is defined, add bounds checking.
|
|
*/
|
|
#ifdef DEBUG
|
|
#define VIPS_REGION_ADDR(R, X, Y) \
|
|
((vips_rect_includespoint(&(R)->valid, (X), (Y))) \
|
|
? ((R)->data + ((Y) - (R)->valid.top) * VIPS_REGION_LSKIP(R) + \
|
|
((X) - (R)->valid.left) * VIPS_REGION_SIZEOF_PEL(R)) \
|
|
: (fprintf(stderr, \
|
|
"VIPS_REGION_ADDR: point out of bounds, " \
|
|
"file \"%s\", line %d\n" \
|
|
"(point x=%d, y=%d\n" \
|
|
" should have been within VipsRect left=%d, top=%d, " \
|
|
"width=%d, height=%d)\n", \
|
|
__FILE__, __LINE__, \
|
|
(X), (Y), \
|
|
(R)->valid.left, \
|
|
(R)->valid.top, \
|
|
(R)->valid.width, \
|
|
(R)->valid.height), \
|
|
abort(), (VipsPel *) NULL))
|
|
#else /*DEBUG*/
|
|
#define VIPS_REGION_ADDR(R, X, Y) \
|
|
((R)->data + \
|
|
((Y) - (R)->valid.top) * VIPS_REGION_LSKIP(R) + \
|
|
((X) - (R)->valid.left) * VIPS_REGION_SIZEOF_PEL(R))
|
|
#endif /*DEBUG*/
|
|
|
|
#define VIPS_REGION_ADDR_TOPLEFT(R) ((R)->data)
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif /*__cplusplus*/
|
|
|
|
#endif /*VIPS_REGION_H*/
|