169 lines
4.9 KiB
C
169 lines
4.9 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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* 2/3/11
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* - move to GObject
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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 VIPS_REGION_H
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#define VIPS_REGION_H
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#ifdef __cplusplus
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extern "C" {
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#endif /*__cplusplus*/
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#define VIPS_TYPE_REGION (vips_region_get_type())
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#define VIPS_REGION( obj ) \
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(G_TYPE_CHECK_INSTANCE_CAST( (obj), \
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VIPS_TYPE_REGION, VipsRegion ))
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#define VIPS_REGION_CLASS( klass ) \
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(G_TYPE_CHECK_CLASS_CAST( (klass), \
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VIPS_TYPE_REGION, VipsRegionClass))
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#define VIPS_IS_REGION( obj ) \
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(G_TYPE_CHECK_INSTANCE_TYPE( (obj), VIPS_TYPE_REGION ))
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#define VIPS_IS_REGION_CLASS( klass ) \
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(G_TYPE_CHECK_CLASS_TYPE( (klass), VIPS_TYPE_REGION ))
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#define VIPS_REGION_GET_CLASS( obj ) \
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(G_TYPE_INSTANCE_GET_CLASS( (obj), \
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VIPS_TYPE_REGION, VipsRegionClass ))
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/* Sub-area of image.
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*/
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typedef struct _VipsRegion {
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VipsObject parent_object;
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/*< public >*/
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/* Users may read these two fields.
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*/
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VipsImage *im; /* Link back to parent image */
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VipsRect valid; /* Area of parent we can see */
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/* The rest of VipsRegion 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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PEL *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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VipsWindow *window;
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/* Ref to the buffer we use for this region, if any.
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*/
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VipsBuffer *buffer;
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/* The image this region is on has changed and caches need to be
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* dropped.
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*/
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gboolean invalid;
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} VipsRegion;
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typedef struct _VipsRegionClass {
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VipsObjectClass parent_class;
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} VipsRegionClass;
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GType vips_region_get_type( void );
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VipsRegion *vips_region_new( VipsImage *im );
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int vips_region_buffer( VipsRegion *reg, VipsRect *r );
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int vips_region_image( VipsRegion *reg, VipsRect *r );
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int vips_region_region( VipsRegion *reg, VipsRegion *dest,
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VipsRect *r, int x, int y );
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int vips_region_equalsregion( VipsRegion *reg1, VipsRegion *reg2 );
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int vips_region_position( VipsRegion *reg, int x, int y );
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void vips_region_paint( VipsRegion *reg, VipsRect *r, int value );
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void vips_region_paint_pel( VipsRegion *reg, VipsRect *r, PEL *ink );
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void vips_region_black( VipsRegion *reg );
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void vips_region_copy( VipsRegion *reg, VipsRegion *dest,
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VipsRect *r, int x, int y );
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int vips_region_prepare( VipsRegion *reg, VipsRect *r );
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int vips_region_prepare_to( VipsRegion *reg,
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VipsRegion *dest, VipsRect *r, int x, int y );
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int vips_region_prepare_many( VipsRegion **reg, VipsRect *r );
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/* Macros on VipsRegion.
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* VIPS_REGION_LSKIP() add to move down line
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* VIPS_REGION_N_ELEMENTS() number of elements across region
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* VIPS_REGION_SIZEOF_LINE() sizeof width of region
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* VIPS_REGION_ADDR() address of pixel in region
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*/
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#define VIPS_REGION_LSKIP( R ) \
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((size_t)((R)->bpl))
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#define VIPS_REGION_N_ELEMENTS( R ) \
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((size_t)((R)->valid.width * (R)->im->Bands))
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#define VIPS_REGION_SIZEOF_LINE( R ) \
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((size_t)((R)->valid.width * VIPS_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 VIPS_REGION_ADDR( R, X, Y ) \
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( (vips_rect_includespoint( &(R)->valid, (X), (Y) ))? \
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((R)->data + ((Y) - (R)->valid.top) * VIPS_REGION_LSKIP(R) + \
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((X) - (R)->valid.left) * VIPS_IMAGE_SIZEOF_PEL((R)->im)): \
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(fprintf( stderr, \
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"VIPS_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 VipsRect 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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(R)->valid.left, \
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(R)->valid.top, \
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(R)->valid.width, \
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(R)->valid.height ), abort(), (PEL *) NULL) \
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)
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#else /*DEBUG*/
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#define VIPS_REGION_ADDR( R, X, Y ) \
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((R)->data + \
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((Y)-(R)->valid.top) * VIPS_REGION_LSKIP( R ) + \
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((X)-(R)->valid.left) * VIPS_IMAGE_SIZEOF_PEL( (R)->im ))
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#endif /*DEBUG*/
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#define VIPS_REGION_ADDR_TOPLEFT( R ) ((R)->data)
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#ifdef __cplusplus
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}
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#endif /*__cplusplus*/
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#endif /*VIPS_REGION_H*/
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