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/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: MapCache tile caching support file: Mixed PNG+JPEG format
* Author: Thomas Bonfort and the MapServer team.
*
******************************************************************************
* Copyright (c) 1996-2011 Regents of the University of Minnesota.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies of this Software or works derived from this Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*****************************************************************************/
#include "mapcache.h"
#include <apr_strings.h>
/**\addtogroup imageio_mixed */
/** @{ */
/**
* \brief encode an image to mixed format
* depending on the transparency of the provided image, use either one
* of the two member encoding formats.
* Intended to be used for creating png when transparency is present, and jpeg
* when fully opaque
* \sa mapcache_image_format::write()
*/
static mapcache_buffer* _mapcache_imageio_mixed_encode( mapcache_context *ctx,
mapcache_image *image, mapcache_image_format *format)
{
mapcache_image_format_mixed *f = (mapcache_image_format_mixed*)format;
if(mapcache_image_has_alpha(image)) {
return f->transparent->write(ctx,image,f->transparent);
} else {
return f->opaque->write(ctx,image,f->opaque);
}
}
mapcache_image_format* mapcache_imageio_create_mixed_format(apr_pool_t *pool,
char *name, mapcache_image_format *transparent, mapcache_image_format *opaque)
{
mapcache_image_format_mixed *format = apr_pcalloc(pool, sizeof(mapcache_image_format_mixed));
format->format.name = name;
format->transparent = transparent;
format->opaque = opaque;
format->format.extension = apr_pstrdup(pool,"xxx");
format->format.mime_type = NULL;
format->format.write = _mapcache_imageio_mixed_encode;
format->format.create_empty_image = transparent->create_empty_image;
format->format.metadata = apr_table_make(pool,3);
return (mapcache_image_format*)format;
}
/** @} */
/* vim: ts=2 sts=2 et sw=2
*/
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