172 lines
5.0 KiB
C
172 lines
5.0 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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/* Sub-area of image.
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*/
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typedef struct _REGION {
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/*< public >*/
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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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/*< private >*/
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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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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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/* IMAGE functions which use regions.
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*/
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int im_prepare( 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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typedef void *(*im_start_fn)( IMAGE *out, void *a, void *b );
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typedef int (*im_generate_fn)( REGION *out, void *seq, void *a, void *b );
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typedef int (*im_stop_fn)( void *seq, void *a, void *b );
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void *im_start_one( IMAGE *out, void *in, void *dummy );
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int im_stop_one( void *seq, void *dummy1, void *dummy2 );
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void *im_start_many( IMAGE *out, void *in, void *dummy );
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int im_stop_many( void *seq, void *dummy1, void *dummy2 );
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IMAGE **im_allocate_input_array( IMAGE *out, ... )
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__attribute__((sentinel));
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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
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);
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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
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);
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int im_demand_hint_array( IMAGE *im, im_demand_type hint, IMAGE **in );
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int im_demand_hint( IMAGE *im, im_demand_type hint, ... )
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__attribute__((sentinel));
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/* Buffer processing.
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*/
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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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typedef void (*im_wraptwo_fn)( void *in1, void *in2, void *out,
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int width, void *a, void *b );
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int im_wraptwo( IMAGE *in1, IMAGE *in2, IMAGE *out,
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im_wraptwo_fn fn, void *a, void *b );
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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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/* 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) \
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((size_t)((R)->bpl))
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#define IM_REGION_N_ELEMENTS(R) \
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((size_t)((R)->valid.width * (R)->im->Bands))
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#define IM_REGION_SIZEOF_LINE(R) \
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((size_t)((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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