294 lines
8.8 KiB
C
294 lines
8.8 KiB
C
/* Definitions for partial image regions.
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*
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* J.Cupitt, 8/4/93
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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#ifndef IM_REGION_H
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#define IM_REGION_H
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#ifdef __cplusplus
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extern "C" {
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#endif /*__cplusplus*/
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#ifdef TIME_THREAD
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#include <sys/time.h>
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#endif /*TIME_THREAD*/
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#include "rect.h"
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/* Per-thread buffer cache. Held in a GPrivate.
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*/
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typedef struct im__buffer_cache_t {
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GHashTable *hash; /* Hash to im_buffer_cache_list_t* */
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GThread *thread; /* Just for sanity checking */
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} im_buffer_cache_t;
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/* Per-image buffer cache. Hash to this from im_buffer_cache_t.
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* We can't store the GSList directly in the hash table, as GHashTable lacks an
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* update operation and we'd need to _remove() and _insert() on every list
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* operation.
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*/
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typedef struct im__buffer_cache_list_t {
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GSList *buffers; /* GSList of im_buffer_t* */
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GThread *thread; /* Just for sanity checking */
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IMAGE *im;
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im_buffer_cache_t *cache;
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} im_buffer_cache_list_t;
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/* What we track for each pixel buffer.
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*/
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typedef struct {
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int ref_count; /* # of regions referencing us */
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IMAGE *im; /* IMAGE we are attached to */
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Rect area; /* Area this pixel buffer covers */
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gboolean done; /* Calculated and in cache */
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im_buffer_cache_t *cache;
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gboolean invalid; /* Needs to be recalculated */
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char *buf; /* Private malloc() area */
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size_t bsize; /* Size of private malloc() */
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} im_buffer_t;
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/* Region types.
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*/
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typedef enum region_type {
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IM_REGION_NONE,
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IM_REGION_BUFFER, /* a pixel buffer */
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IM_REGION_OTHER_REGION, /* memory on another region */
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IM_REGION_OTHER_IMAGE, /* memory on another image */
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IM_REGION_WINDOW /* mmap() buffer on fd on another image */
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} RegionType;
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/* Sub-area of image.
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*/
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typedef struct region_struct {
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/* Users may read these two fields.
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*/
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IMAGE *im; /* Link back to parent image */
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Rect valid; /* Area of parent we can see */
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/* The rest of REGION is private.
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*/
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RegionType type; /* What kind of attachment */
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char *data; /* Off here to get data */
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int bpl; /* Bytes-per-line for data */
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void *seq; /* Sequence we are using to fill region */
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/* The thread that made this region. Used to assert() test that
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* regions are not being shared between threads.
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*/
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GThread *thread;
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/* Ref to the window we use for this region, if any.
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*/
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im_window_t *window;
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/* Ref to the buffer we use for this region, if any.
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*/
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im_buffer_t *buffer;
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} REGION;
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/* Private to iofuncs: the size of the `tiles' requested by im_generate()
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* when acting as a data sink.
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*/
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#define IM__TILE_WIDTH (64)
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#define IM__TILE_HEIGHT (64)
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/* The height of the strips for the other two request styles.
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*/
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#define IM__THINSTRIP_HEIGHT (1)
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#define IM__FATSTRIP_HEIGHT (16)
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/* Functions on regions.
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*/
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void im__region_take_ownership( REGION *reg );
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void im__region_check_ownership( REGION *reg );
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void im__region_no_ownership( REGION *reg );
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REGION *im_region_create( IMAGE *im );
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void im_region_free( REGION *reg );
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int im_region_buffer( REGION *reg, Rect *r );
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int im_region_image( REGION *reg, Rect *r );
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int im_region_region( REGION *reg, REGION *to, Rect *r, int x, int y );
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int im_region_equalsregion( REGION *reg1, REGION *reg2 );
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int im_region_position( REGION *reg1, int x, int y );
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typedef int (*im_region_fill_fn)( REGION *, void * );
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int im_region_fill( REGION *reg, Rect *r, im_region_fill_fn fn, void *a );
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/* IMAGE functions which use regions. We do not strictly type the function
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* arguments to avoid hassle.
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*/
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int im_prepare( REGION *reg, Rect *r );
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int im_prepare_many( REGION **reg, Rect *r );
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int im_prepare_to( REGION *reg, REGION *dest, Rect *r, int x, int y );
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int im_generate( IMAGE *im,
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void *(*start_fn)(), int (*gen_fn)(), int (*stop_fn)(),
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void *a, void *b
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);
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int im_iterate( IMAGE *im,
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void *(*start_fn)(), int (*scan_fn)(), int (*stop_fn)(),
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void *a, void *b
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);
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void im__copy_region( REGION *reg, REGION *dest, Rect *r, int x, int y );
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/* Convenience functions for im_generate()/im_iterate().
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*/
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void *im_start_one( IMAGE *out, IMAGE *in, void *dummy );
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int im_stop_one( REGION *reg, void *dummy1, void *dummy2 );
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void *im_start_many( IMAGE *out, IMAGE **in, void *dummy );
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int im_stop_many( REGION **out, void *dummy1, void *dummy2 );
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IMAGE **im_allocate_input_array( IMAGE *out, ... );
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int im_demand_hint( IMAGE *im, im_demand_type hint, ... )
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__attribute__((sentinel));
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int im_demand_hint_array( IMAGE *im, im_demand_type hint, IMAGE **in );
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void im_free_region_array( REGION **regs );
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REGION **im_allocate_region_array( IMAGE *im, int count );
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void im__find_demand_size( IMAGE *im, int *pw, int *ph );
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/* Buffer processing.
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*/
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typedef void (*im_wrapmany_fn)( void **in, void *out, int width,
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void *a, void *b );
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int im_wrapmany( IMAGE **in, IMAGE *out,
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im_wrapmany_fn fn, void *a, void *b );
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typedef void (*im_wrapone_fn)( void *in, void *out, int width,
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void *a, void *b );
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int im_wrapone( IMAGE *in, IMAGE *out,
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im_wrapone_fn fn, void *a, void *b );
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/* Internal VIPS functions shared by partials.
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*/
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int im__call_start( REGION *reg );
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void im__call_stop( REGION *reg );
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/* window manager.
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*/
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im_window_t *im_window_ref( IMAGE *im, int top, int height );
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int im_window_unref( im_window_t *window );
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void im_window_print( im_window_t *window );
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/* buffer manager.
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*/
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void im_buffer_done( im_buffer_t *buffer );
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void im_buffer_undone( im_buffer_t *buffer );
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void im_buffer_unref( im_buffer_t *buffer );
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im_buffer_t *im_buffer_ref( IMAGE *im, Rect *area );
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im_buffer_t *im_buffer_unref_ref( im_buffer_t *buffer, IMAGE *im, Rect *area );
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void im_buffer_print( im_buffer_t *buffer );
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void im_invalidate( IMAGE *im );
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/* Only define if IM_ENABLE_DEPRECATED is set.
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*/
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#ifdef IM_ENABLE_DEPRECATED
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/* Compatibilty macros ... delete soon. See below for the new names.
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*/
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/* Macros on REGIONs.
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* lskip() add to move down line
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* nele() number of elements across region
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* rsize() sizeof width of region
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* addr() address of pixel in region
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*/
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#define lskip(B) ((B)->bpl)
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#define nele(B) ((B)->valid.width*(B)->im->Bands)
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#define rsize(B) ((B)->valid.width*psize((B)->im))
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/* addr() is special: if DEBUG is defined, make an addr() with bounds checking.
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*/
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#ifdef DEBUG
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#define addr(B,X,Y) \
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( (im_rect_includespoint( &(B)->valid, (X), (Y) ))? \
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((B)->data + ((Y) - (B)->valid.top)*lskip(B) + \
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((X) - (B)->valid.left)*psize((B)->im)): \
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(fprintf( stderr, \
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"addr: point out of bounds, file \"%s\", line %d\n" \
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"(point x=%d, y=%d\n" \
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" should have been within Rect left=%d, top=%d, " \
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"width=%d, height=%d)\n", \
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__FILE__, __LINE__, \
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(X), (Y), \
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(B)->valid.left, \
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(B)->valid.top, \
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(B)->valid.width, \
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(B)->valid.height ), abort(), (char *) NULL) \
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)
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#else /*DEBUG*/
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#define addr(B,X,Y) ((B)->data + ((Y)-(B)->valid.top)*lskip(B) + \
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((X)-(B)->valid.left)*psize((B)->im))
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#endif /*DEBUG*/
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#endif /*IM_ENABLE_DEPRECATED*/
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/* Macros on REGIONs.
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* IM_REGION_LSKIP() add to move down line
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* IM_REGION_N_ELEMENTS() number of elements across region
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* IM_REGION_SIZEOF_LINE() sizeof width of region
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* IM_REGION_ADDR() address of pixel in region
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*/
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#define IM_REGION_LSKIP(R) ((R)->bpl)
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#define IM_REGION_N_ELEMENTS(R) ((R)->valid.width*(R)->im->Bands)
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#define IM_REGION_SIZEOF_LINE(R) \
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((R)->valid.width * IM_IMAGE_SIZEOF_PEL((R)->im))
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/* If DEBUG is defined, add bounds checking.
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*/
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#ifdef DEBUG
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#define IM_REGION_ADDR(B,X,Y) \
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( (im_rect_includespoint( &(B)->valid, (X), (Y) ))? \
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((B)->data + ((Y) - (B)->valid.top)*IM_REGION_LSKIP(B) + \
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((X) - (B)->valid.left)*IM_IMAGE_SIZEOF_PEL((B)->im)): \
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(fprintf( stderr, \
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"IM_REGION_ADDR: point out of bounds, " \
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"file \"%s\", line %d\n" \
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"(point x=%d, y=%d\n" \
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" should have been within Rect left=%d, top=%d, " \
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"width=%d, height=%d)\n", \
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__FILE__, __LINE__, \
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(X), (Y), \
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(B)->valid.left, \
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(B)->valid.top, \
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(B)->valid.width, \
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(B)->valid.height ), abort(), (char *) NULL) \
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)
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#else /*DEBUG*/
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#define IM_REGION_ADDR(B,X,Y) \
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((B)->data + \
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((Y)-(B)->valid.top) * IM_REGION_LSKIP(B) + \
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((X)-(B)->valid.left) * IM_IMAGE_SIZEOF_PEL((B)->im))
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#endif /*DEBUG*/
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#define IM_REGION_ADDR_TOPLEFT(B) ( (B)->data )
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#ifdef __cplusplus
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}
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#endif /*__cplusplus*/
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#endif /*IM_REGION_H*/
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