libvips/libsrc/inplace/im_paintrect.c

106 lines
2.3 KiB
C

/* @(#) Fill Rect r of image im with pels of colour ink. r can be any size and
* @(#) any position, we clip against the image size.
* @(#)
* @(#) int
* @(#) im_paintrect( IMAGE *im, Rect *r, PEL *ink )
* @(#)
* @(#)
*
* Copyright: J. Cupitt
* Written: 15/06/1992
* 22/7/93 JC
* - im_incheck() added
* 16/8/94 JC
* - im_incheck() changed to im_makerw()
* 5/12/06
* - im_invalidate() after paint
*/
/*
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
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <stdio.h>
#include <stdlib.h>
#include <vips/vips.h>
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif /*WITH_DMALLOC*/
/* Paint a rect of colour into an image.
*/
int
im_paintrect( IMAGE *im, Rect *r, PEL *ink )
{
int es = im->Bbits >> 3;
int ps = es * im->Bands;
int ls = ps * im->Xsize;
Rect image, clipped;
int x, y, b;
PEL *to;
PEL *q;
if( im_rwcheck( im ) )
return( -1 );
/* Find area we plot.
*/
image.left = 0;
image.top = 0;
image.width = im->Xsize;
image.height = im->Ysize;
im_rect_intersectrect( r, &image, &clipped );
/* Any points left to plot?
*/
if( im_rect_isempty( &clipped ) )
return( 0 );
/* Loop through image plotting where required.
*/
to = (PEL *) im->data + clipped.left * ps + clipped.top * ls;
for( y = 0; y < clipped.height; y++ ) {
q = to;
for( x = 0; x < clipped.width; x++ )
for( b = 0; b < ps; b++ )
*q++ = ink[b];
to += ls;
}
im_invalidate( im );
return( 0 );
}