145 lines
3.3 KiB
C
145 lines
3.3 KiB
C
/* Fill Rect r of image im with pels of colour ink.
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*
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* Copyright: J. Cupitt
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* Written: 15/06/1992
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* 22/7/93 JC
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* - im_incheck() added
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* 16/8/94 JC
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* - im_incheck() changed to im_makerw()
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* 5/12/06
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* - im_invalidate() after paint
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* 6/3/10
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* - don't im_invalidate() after paint, this now needs to be at a higher
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* level
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* 22/9/10
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* - gtk-doc
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* - added 'fill'
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* - renamed as im_draw_rect() for consistency
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* 27/9/10
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* - memcpy() subsequent lines of the rect
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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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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <vips/intl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <vips/vips.h>
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#ifdef WITH_DMALLOC
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#include <dmalloc.h>
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#endif /*WITH_DMALLOC*/
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/**
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* im_draw_rect:
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* @image: image to draw on
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* @left: area to paint
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* @top: area to paint
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* @width: area to paint
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* @height: area to paint
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* @fill: fill the rect
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* @ink: paint with this colour
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*
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* Paint pixels within @left, @top, @width, @height in @image with @ink. If
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* @fill is zero, just paint a 1-pixel-wide outline.
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*
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* This an inplace operation, so @main is changed. It does not thread and will
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* not work well as part of a pipeline.
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*
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* See also: im_draw_circle().
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*
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* Returns: 0 on success, or -1 on error.
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*/
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int
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im_draw_rect( IMAGE *im,
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int left, int top, int width, int height, int fill, PEL *ink )
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{
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int es = IM_IMAGE_SIZEOF_ELEMENT( im );
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int ps = es * im->Bands;
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int ls = ps * im->Xsize;
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Rect image, rect, clipped;
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int x, y, b;
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PEL *to;
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PEL *q;
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if( !fill )
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return( im_draw_rect( im, left, top, width, 1, 1, ink ) ||
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im_draw_rect( im,
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left + width - 1, top, 1, height, 1, ink ) ||
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im_draw_rect( im,
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left, top + height - 1, width, 1, 1, ink ) ||
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im_draw_rect( im, left, top, 1, height, 1, ink ) );
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if( im_rwcheck( im ) )
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return( -1 );
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/* Find area we plot.
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*/
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image.left = 0;
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image.top = 0;
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image.width = im->Xsize;
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image.height = im->Ysize;
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rect.left = left;
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rect.top = top;
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rect.width = width;
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rect.height = height;
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im_rect_intersectrect( &rect, &image, &clipped );
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/* Any points left to plot?
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*/
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if( im_rect_isempty( &clipped ) )
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return( 0 );
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/* We plot the first line pointwise, then memcpy() it for the
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* subsequent lines.
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*/
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to = (PEL *) IM_IMAGE_ADDR( im, clipped.left, clipped.top );
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q = to;
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for( x = 0; x < clipped.width; x++ )
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for( b = 0; b < ps; b++ ) {
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q[b] = ink[b];
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q += ps;
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}
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q = to + ls;
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for( y = 1; y < clipped.height; y++ ) {
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memcpy( q, to, clipped.width * ps );
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q += ls;
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}
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return( 0 );
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}
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