/*
 * Copyright 2011 John-Mark Bell <jmb@netsurf-browser.org>
 *
 * This file is part of NetSurf, http://www.netsurf-browser.org/
 *
 * NetSurf is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * NetSurf 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <assert.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>

#include "utils/errors.h"

#include "image/image.h"
#include "image/image_cache.h"
#include "image/bmp.h"
#include "image/gif.h"
#include "image/ico.h"
#include "image/jpeg.h"
#include "image/mng.h"
#include "image/nssprite.h"
#include "image/png.h"
#include "image/rsvg.h"
#include "image/svg.h"
#include "image/webp.h"

#include "utils/config.h"

/** low water mark for speculative pre-conversion */

/* Experimenting by visiting every page from default page in order and
 * then netsurf homepage
 *
 * 0    : Cache hit/miss/speculative miss/fail 604/147/  0/0 (80%/19%/ 0%/ 0%)
 * 2048 : Cache hit/miss/speculative miss/fail 622/119/ 17/0 (82%/15%/ 2%/ 0%)
 * 4096 : Cache hit/miss/speculative miss/fail 656/109/ 25/0 (83%/13%/ 3%/ 0%)
 * 8192 : Cache hit/miss/speculative miss/fail 648/104/ 40/0 (81%/13%/ 5%/ 0%)
 * ALL  : Cache hit/miss/speculative miss/fail 775/  0/161/0 (82%/ 0%/17%/ 0%)
*/
#define SPECULATE_SMALL 4096

/* the time between cache clean runs in ms */
#define CACHE_CLEAN_TIME (10 * 1000)

/**
 * Initialise image content handlers
 *
 * \return NSERROR_OK on success, appropriate error otherwise.
 */
nserror image_init(void)
{
	nserror error;
	struct image_cache_parameters image_cache_parameters = {
		.bg_clean_time = CACHE_CLEAN_TIME,
		.limit = (8 * 1024 * 1024),
		.hysteresis = (2 * 1024 * 1024),
		.speculative_small = SPECULATE_SMALL
	};

	error = image_cache_init(&image_cache_parameters);
	if (error != NSERROR_OK)
		return error;

#ifdef WITH_BMP
	error = nsbmp_init();
	if (error != NSERROR_OK)
		return error;
#endif

#ifdef WITH_GIF
	error = nsgif_init();
	if (error != NSERROR_OK)
		return error;
#endif

#ifdef WITH_BMP
	error = nsico_init();
	if (error != NSERROR_OK)
		return error;
#endif

#ifdef WITH_JPEG
	error = nsjpeg_init();
	if (error != NSERROR_OK)
		return error;
#endif

#ifdef WITH_MNG
	error = nsmng_init();
	if (error != NSERROR_OK)
		return error;

	error = nsjpng_init();
	if (error != NSERROR_OK)
		return error;
#endif

#ifdef WITH_PNG
	/* Prefer libpng over libmng for pngs by registering later */
	error = nspng_init();
	if (error != NSERROR_OK)
		return error;
#endif

#ifdef WITH_NSSPRITE
	error = nssprite_init();
	if (error != NSERROR_OK)
		return error;
#endif

	/* Prefer rsvg over libsvgtiny for svgs */
#ifdef WITH_NS_SVG
	error = svg_init();
	if (error != NSERROR_OK)
		return error;
#endif
#ifdef WITH_RSVG
	error = nsrsvg_init();
	if (error != NSERROR_OK)
		return error;
#endif

#ifdef WITH_WEBP
	error = webp_init();
	if (error != NSERROR_OK)
		return error;
#endif /* WITH_WEBP */

	return NSERROR_OK;
}

/**
 * Finalise image content handlers
 */
void image_fini(void)
{
#ifdef WITH_BMP
	nsbmp_fini();
#endif

#ifdef WITH_GIF
	nsgif_fini();
#endif

#ifdef WITH_BMP
	nsico_fini();
#endif

#ifdef WITH_JPEG
	nsjpeg_fini();
#endif

#ifdef WITH_MNG
	nsmng_fini();
	nsjpng_fini();
#endif

#ifdef WITH_NSSPRITE
	nssprite_fini();
#endif

#ifdef WITH_PNG
	nspng_fini();
#endif

#ifdef WITH_RSVG
	nsrsvg_fini();
#endif

#ifdef WITH_NS_SVG
	svg_fini();
#endif

#ifdef WITH_WEBP
	webp_fini();
#endif 

	/* dump any remaining cache entries */
	image_cache_fini();
}