libvips/include/vips/region.h

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/* Definitions for partial image regions.
*
* J.Cupitt, 8/4/93
*/
/*
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifndef IM_REGION_H
#define IM_REGION_H
#ifdef __cplusplus
extern "C" {
#endif /*__cplusplus*/
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/* Profiling madness only, who cares about portability.
*/
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#ifdef TIME_THREAD
#include <sys/time.h>
#endif /*TIME_THREAD*/
/* Per-thread buffer cache. Held in a GPrivate.
*/
typedef struct im__buffer_cache_t {
GHashTable *hash; /* Hash to im_buffer_cache_list_t* */
GThread *thread; /* Just for sanity checking */
} im_buffer_cache_t;
/* Per-image buffer cache. Hash to this from im_buffer_cache_t.
* We can't store the GSList directly in the hash table, as GHashTable lacks an
* update operation and we'd need to _remove() and _insert() on every list
* operation.
*/
typedef struct im__buffer_cache_list_t {
GSList *buffers; /* GSList of im_buffer_t* */
GThread *thread; /* Just for sanity checking */
IMAGE *im;
im_buffer_cache_t *cache;
} im_buffer_cache_list_t;
/* What we track for each pixel buffer.
*/
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typedef struct im__buffer_t {
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int ref_count; /* # of regions referencing us */
IMAGE *im; /* IMAGE we are attached to */
Rect area; /* Area this pixel buffer covers */
gboolean done; /* Calculated and in cache */
im_buffer_cache_t *cache;
gboolean invalid; /* Needs to be recalculated */
char *buf; /* Private malloc() area */
size_t bsize; /* Size of private malloc() */
} im_buffer_t;
/* Region types.
*/
typedef enum region_type {
IM_REGION_NONE,
IM_REGION_BUFFER, /* a pixel buffer */
IM_REGION_OTHER_REGION, /* memory on another region */
IM_REGION_OTHER_IMAGE, /* memory on another image */
IM_REGION_WINDOW /* mmap() buffer on fd on another image */
} RegionType;
/* Sub-area of image.
*/
typedef struct region_struct {
/* Users may read these two fields.
*/
IMAGE *im; /* Link back to parent image */
Rect valid; /* Area of parent we can see */
/* The rest of REGION is private.
*/
RegionType type; /* What kind of attachment */
char *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.
*/
im_window_t *window;
/* Ref to the buffer we use for this region, if any.
*/
im_buffer_t *buffer;
} REGION;
/* Private to iofuncs: the size of the `tiles' requested by im_generate()
* when acting as a data sink.
*/
#define IM__TILE_WIDTH (64)
#define IM__TILE_HEIGHT (64)
/* The height of the strips for the other two request styles.
*/
#define IM__THINSTRIP_HEIGHT (1)
#define IM__FATSTRIP_HEIGHT (16)
/* Functions on regions.
*/
void im__region_take_ownership( REGION *reg );
void im__region_check_ownership( REGION *reg );
void im__region_no_ownership( REGION *reg );
REGION *im_region_create( IMAGE *im );
void im_region_free( REGION *reg );
int im_region_buffer( REGION *reg, Rect *r );
int im_region_image( REGION *reg, Rect *r );
int im_region_region( REGION *reg, REGION *to, Rect *r, int x, int y );
int im_region_equalsregion( REGION *reg1, REGION *reg2 );
int im_region_position( REGION *reg1, int x, int y );
typedef int (*im_region_fill_fn)( REGION *, void * );
int im_region_fill( REGION *reg, Rect *r, im_region_fill_fn fn, void *a );
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void im_region_print( REGION *region );
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/* IMAGE functions which use regions.
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*/
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typedef void *(*im_start_fn)( IMAGE *, void *, void * );
typedef int (*im_generate_fn)( REGION *, void *, void *, void *);
typedef int (*im_stop_fn)( void *, void *, void * );
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int im_prepare( REGION *reg, Rect *r );
int im_prepare_many( REGION **reg, Rect *r );
int im_prepare_to( REGION *reg, REGION *dest, Rect *r, int x, int y );
int im_generate( IMAGE *im,
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im_start_fn start, im_generate_fn generate, im_stop_fn stop,
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void *a, void *b
);
int im_iterate( IMAGE *im,
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im_start_fn start, im_generate_fn generate, im_stop_fn stop,
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void *a, void *b
);
void im__copy_region( REGION *reg, REGION *dest, Rect *r, int x, int y );
/* Convenience functions for im_generate()/im_iterate().
*/
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void *im_start_one( IMAGE *out, void *in, void *dummy );
int im_stop_one( void *seq, void *dummy1, void *dummy2 );
void *im_start_many( IMAGE *out, void *in, void *dummy );
int im_stop_many( void *seq, void *dummy1, void *dummy2 );
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IMAGE **im_allocate_input_array( IMAGE *out, ... );
int im_demand_hint( IMAGE *im, im_demand_type hint, ... )
__attribute__((sentinel));
int im_demand_hint_array( IMAGE *im, im_demand_type hint, IMAGE **in );
void im_free_region_array( REGION **regs );
REGION **im_allocate_region_array( IMAGE *im, int count );
void im__find_demand_size( IMAGE *im, int *pw, int *ph );
/* Buffer processing.
*/
typedef void (*im_wrapone_fn)( void *in, void *out, int width,
void *a, void *b );
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typedef void (*im_wraptwo_fn)( void *in1, void *in2, void *out,
int width, void *a, void *b );
typedef void (*im_wrapmany_fn)( void **in, void *out, int width,
void *a, void *b );
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int im_wrapone( IMAGE *in, IMAGE *out,
im_wrapone_fn fn, void *a, void *b );
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int im_wraptwo( IMAGE *in1, IMAGE *in2, IMAGE *out,
im_wraptwo_fn fn, void *a, void *b );
int im_wrapmany( IMAGE **in, IMAGE *out,
im_wrapmany_fn fn, void *a, void *b );
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/* Internal VIPS functions shared by partials.
*/
int im__call_start( REGION *reg );
void im__call_stop( REGION *reg );
/* window manager.
*/
im_window_t *im_window_ref( IMAGE *im, int top, int height );
int im_window_unref( im_window_t *window );
void im_window_print( im_window_t *window );
/* buffer manager.
*/
void im_buffer_done( im_buffer_t *buffer );
void im_buffer_undone( im_buffer_t *buffer );
void im_buffer_unref( im_buffer_t *buffer );
im_buffer_t *im_buffer_ref( IMAGE *im, Rect *area );
im_buffer_t *im_buffer_unref_ref( im_buffer_t *buffer, IMAGE *im, Rect *area );
void im_buffer_print( im_buffer_t *buffer );
void im_invalidate( IMAGE *im );
/* Only define if IM_ENABLE_DEPRECATED is set.
*/
#ifdef IM_ENABLE_DEPRECATED
/* Compatibilty macros ... delete soon. See below for the new names.
*/
/* Macros on REGIONs.
* lskip() add to move down line
* nele() number of elements across region
* rsize() sizeof width of region
* addr() address of pixel in region
*/
#define lskip(B) ((B)->bpl)
#define nele(B) ((B)->valid.width*(B)->im->Bands)
#define rsize(B) ((B)->valid.width*psize((B)->im))
/* addr() is special: if DEBUG is defined, make an addr() with bounds checking.
*/
#ifdef DEBUG
#define addr(B,X,Y) \
( (im_rect_includespoint( &(B)->valid, (X), (Y) ))? \
((B)->data + ((Y) - (B)->valid.top)*lskip(B) + \
((X) - (B)->valid.left)*psize((B)->im)): \
(fprintf( stderr, \
"addr: point out of bounds, file \"%s\", line %d\n" \
"(point x=%d, y=%d\n" \
" should have been within Rect left=%d, top=%d, " \
"width=%d, height=%d)\n", \
__FILE__, __LINE__, \
(X), (Y), \
(B)->valid.left, \
(B)->valid.top, \
(B)->valid.width, \
(B)->valid.height ), abort(), (char *) NULL) \
)
#else /*DEBUG*/
#define addr(B,X,Y) ((B)->data + ((Y)-(B)->valid.top)*lskip(B) + \
((X)-(B)->valid.left)*psize((B)->im))
#endif /*DEBUG*/
#endif /*IM_ENABLE_DEPRECATED*/
/* Macros on REGIONs.
* IM_REGION_LSKIP() add to move down line
* IM_REGION_N_ELEMENTS() number of elements across region
* IM_REGION_SIZEOF_LINE() sizeof width of region
* IM_REGION_ADDR() address of pixel in region
*/
#define IM_REGION_LSKIP(R) ((R)->bpl)
#define IM_REGION_N_ELEMENTS(R) ((R)->valid.width*(R)->im->Bands)
#define IM_REGION_SIZEOF_LINE(R) \
((R)->valid.width * IM_IMAGE_SIZEOF_PEL((R)->im))
/* If DEBUG is defined, add bounds checking.
*/
#ifdef DEBUG
#define IM_REGION_ADDR(B,X,Y) \
( (im_rect_includespoint( &(B)->valid, (X), (Y) ))? \
((B)->data + ((Y) - (B)->valid.top)*IM_REGION_LSKIP(B) + \
((X) - (B)->valid.left)*IM_IMAGE_SIZEOF_PEL((B)->im)): \
(fprintf( stderr, \
"IM_REGION_ADDR: point out of bounds, " \
"file \"%s\", line %d\n" \
"(point x=%d, y=%d\n" \
" should have been within Rect left=%d, top=%d, " \
"width=%d, height=%d)\n", \
__FILE__, __LINE__, \
(X), (Y), \
(B)->valid.left, \
(B)->valid.top, \
(B)->valid.width, \
(B)->valid.height ), abort(), (char *) NULL) \
)
#else /*DEBUG*/
#define IM_REGION_ADDR(B,X,Y) \
((B)->data + \
((Y)-(B)->valid.top) * IM_REGION_LSKIP(B) + \
((X)-(B)->valid.left) * IM_IMAGE_SIZEOF_PEL((B)->im))
#endif /*DEBUG*/
#define IM_REGION_ADDR_TOPLEFT(B) ( (B)->data )
#ifdef __cplusplus
}
#endif /*__cplusplus*/
#endif /*IM_REGION_H*/