| /* replicate an image x times horizontally and vertically |
| * |
| * JC, 30 sep 03 |
| * |
| * 15/4/04 |
| * - some optimisations for some cases |
| * 1/2/10 |
| * - gtkdoc |
| */ |
| |
| /* |
| |
| 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 |
| |
| */ |
| |
| /* Turn on debugging output. |
| #define DEBUG |
| #define DEBUG_PAINT |
| #define DEBUG_MAKE |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif /*HAVE_CONFIG_H*/ |
| #include <vips/intl.h> |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <vips/vips.h> |
| |
| #ifdef WITH_DMALLOC |
| #include <dmalloc.h> |
| #endif /*WITH_DMALLOC*/ |
| |
| static int |
| replicate_gen( REGION *or, void *seq, void *a, void *b ) |
| { |
| REGION *ir = (REGION *) seq; |
| IMAGE *in = (IMAGE *) a; |
| Rect *r = &or->valid; |
| int twidth = in->Xsize; |
| int theight = in->Ysize; |
| int x, y; |
| Rect tile; |
| |
| /* Find top left of tiles we need. |
| */ |
| int xs = (r->left / twidth) * twidth; |
| int ys = (r->top / theight) * theight; |
| |
| /* The tile enclosing the top-left corner of the requested area. |
| */ |
| tile.left = xs; |
| tile.top = ys; |
| tile.width = twidth; |
| tile.height = theight; |
| |
| /* If the request fits inside a single tile, we can just pointer-copy. |
| */ |
| if( im_rect_includesrect( &tile, r ) ) { |
| Rect irect; |
| |
| /* Translate request to input space. |
| */ |
| irect = *r; |
| irect.left -= xs; |
| irect.top -= ys; |
| if( im_prepare( ir, &irect ) ) |
| return( -1 ); |
| |
| if( im_region_region( or, ir, r, irect.left, irect.top ) ) |
| return( -1 ); |
| |
| return( 0 ); |
| } |
| |
| for( y = ys; y < IM_RECT_BOTTOM( r ); y += theight ) |
| for( x = xs; x < IM_RECT_RIGHT( r ); x += twidth ) { |
| Rect paint; |
| |
| /* Whole tile at x, y |
| */ |
| tile.left = x; |
| tile.top = y; |
| tile.width = twidth; |
| tile.height = theight; |
| |
| /* Which parts touch the area of the output we are |
| * building. |
| */ |
| im_rect_intersectrect( &tile, r, &paint ); |
| |
| /* Translate back to ir coordinates. |
| */ |
| paint.left -= x; |
| paint.top -= y; |
| |
| g_assert( !im_rect_isempty( &paint ) ); |
| |
| /* Render into or. |
| */ |
| if( im_prepare_to( ir, or, &paint, |
| paint.left + x, |
| paint.top + y ) ) |
| return( -1 ); |
| } |
| |
| return( 0 ); |
| } |
| |
| /** |
| * im_replicate: |
| * @in: input image |
| * @out: output image |
| * @across: repeat @in this many times across |
| * @down: repeat @in this many times down |
| * |
| * Replicate an image x times horizontally and vertically. |
| * |
| * See also: im_embed(), im_copy(). |
| * |
| * Returns: 0 on success, -1 on error. |
| */ |
| int |
| im_replicate( IMAGE *in, IMAGE *out, int across, int down ) |
| { |
| if( across <= 0 || down <= 0 ) { |
| im_error( "im_replicate", "%s", _( "bad parameters" ) ); |
| return( -1 ); |
| } |
| if( im_piocheck( in, out ) || |
| im_cp_desc( out, in ) ) |
| return( -1 ); |
| out->Xsize *= across; |
| out->Ysize *= down; |
| |
| /* We can render small tiles with pointer copies. |
| */ |
| if( im_demand_hint( out, IM_SMALLTILE, in, NULL ) ) |
| return( -1 ); |
| |
| if( im_generate( out, |
| im_start_one, replicate_gen, im_stop_one, in, NULL ) ) |
| return( -1 ); |
| |
| return( 0 ); |
| } |
| |