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/* vips_sink_screen() as an operation.
*
* 13/1/12
* - from tilecache.c
*/
/*
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 cache of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/*
#define VIPS_DEBUG
*/
#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>
#include <vips/internal.h>
#include <vips/debug.h>
#include "pconversion.h"
typedef struct _VipsCache {
VipsConversion parent_instance;
VipsImage *in;
int tile_width;
int tile_height;
int max_tiles;
} VipsCache;
typedef VipsConversionClass VipsCacheClass;
G_DEFINE_TYPE( VipsCache, vips_cache, VIPS_TYPE_CONVERSION );
static int
vips_cache_build( VipsObject *object )
{
VipsConversion *conversion = VIPS_CONVERSION( object );
VipsCache *cache = (VipsCache *) object;
VIPS_DEBUG_MSG( "vips_cache_build\n" );
if( VIPS_OBJECT_CLASS( vips_cache_parent_class )->build( object ) )
return( -1 );
if( vips_sink_screen( cache->in, conversion->out, NULL,
cache->tile_width, cache->tile_height, cache->max_tiles,
0, NULL, NULL ) )
return( -1 );
return( 0 );
}
static void
vips_cache_class_init( VipsCacheClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
VIPS_DEBUG_MSG( "vips_cache_class_init\n" );
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
vobject_class->nickname = "cache";
vobject_class->description = _( "cache an image" );
vobject_class->build = vips_cache_build;
VIPS_ARG_IMAGE( class, "in", 1,
_( "Input" ),
_( "Input image" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsCache, in ) );
VIPS_ARG_INT( class, "tile_width", 3,
_( "Tile width" ),
_( "Tile width in pixels" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsCache, tile_width ),
1, 1000000, 128 );
VIPS_ARG_INT( class, "tile_height", 3,
_( "Tile height" ),
_( "Tile height in pixels" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsCache, tile_height ),
1, 1000000, 128 );
VIPS_ARG_INT( class, "max_tiles", 3,
_( "Max tiles" ),
_( "Maximum number of tiles to cache" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsCache, max_tiles ),
-1, 1000000, 1000 );
}
static void
vips_cache_init( VipsCache *cache )
{
/* By default, enough pixels for two 1920 x 1080 displays.
*/
cache->tile_width = 128;
cache->tile_height = 128;
cache->max_tiles = 250;
}
/**
* vips_cache:
* @in: input image
* @out: output image
* @...: %NULL-terminated list of optional named arguments
*
* Optional arguments:
*
* * @tile_width: width of tiles in cache
* * @tile_height: height of tiles in cache
* * @max_tiles: maximum number of tiles to cache
*
* This operation behaves rather like vips_copy() between images
* @in and @out, except that it keeps a cache of computed pixels.
* This cache is made of up to @max_tiles tiles (a value of -1
* means any number of tiles), and each tile is of size @tile_width
* by @tile_height pixels. By default it will cache 250 128 x 128 pixel tiles,
* enough for two 1920 x 1080 images.
*
* This operation is a thin wrapper over vips_sink_screen(), see the
* documentation for that operation for details.
*
* It uses a set of background threads to calculate pixels and the various
* active cache operations coordinate so as not to overwhelm your system. When
* a request is made for an area of pixels, the operation will block until all
* of those pixels have been calculated. Pixels are calculated with a set of
* threads.
*
* See also: vips_tilecache().
*
* Returns: 0 on success, -1 on error.
*/
int
vips_cache( VipsImage *in, VipsImage **out, ... )
{
va_list ap;
int result;
va_start( ap, out );
result = vips_call_split( "cache", ap, in, out );
va_end( ap );
return( result );
}
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