WebSurf/image/ico.c

/*
 * Copyright 2006 Richard Wilson <info@tinct.net>
 *
 * 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/>.
 */

/** \file
 * Content for image/ico (implementation)
 */

#include "utils/config.h"
#ifdef WITH_BMP

#include <assert.h>
#include <string.h>
#include <stdbool.h>
#include <stdlib.h>
#include <libnsbmp.h>
#include "utils/config.h"
#include "content/content_protected.h"
#include "content/hlcache.h"
#include "desktop/plotters.h"
#include "image/bitmap.h"
#include "image/ico.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/utils.h"

bool nsico_create(struct content *c, const struct http_parameter *params)
{
	union content_msg_data msg_data;
	c->data.ico.ico = calloc(sizeof(ico_collection), 1);
	if (!c->data.ico.ico) {
		msg_data.error = messages_get("NoMemory");
		content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
		return false;
	}
	ico_collection_create(c->data.ico.ico, &bmp_bitmap_callbacks);
	return true;
}


bool nsico_convert(struct content *c)
{
	struct bmp_image *bmp;
	bmp_result res;
	ico_collection *ico;
	union content_msg_data msg_data;
	const char *data;
	unsigned long size;
	char title[100];

	/* set the ico data */
	ico = c->data.ico.ico;

	data = content__get_source_data(c, &size);

	/* analyse the ico */
	res = ico_analyse(ico, size, (unsigned char *) data);

	switch (res) {
	case BMP_OK:
		break;
	case BMP_INSUFFICIENT_MEMORY:
		msg_data.error = messages_get("NoMemory");
		content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
		return false;
	case BMP_INSUFFICIENT_DATA:
	case BMP_DATA_ERROR:
		msg_data.error = messages_get("BadICO");
		content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
		return false;
	}

	/* Store our content width and description */
	c->width = ico->width;
	c->height = ico->height;
	snprintf(title, sizeof(title), messages_get("ICOTitle"), 
			c->width, c->height, size);
	content__set_title(c, title);
	c->size += (ico->width * ico->height * 4) + 16 + 44;

	/* exit as a success */
	bmp = ico_find(c->data.ico.ico, 255, 255);
	assert(bmp);
	c->bitmap = bmp->bitmap;
	bitmap_modified(c->bitmap);

	content_set_ready(c);
	content_set_done(c);

	/* Done: update status bar */
	content_set_status(c, "");
	return true;
}

bool nsico_redraw(struct content *c, int x, int y,
		int width, int height, const struct rect *clip,
		float scale, colour background_colour)
{
	struct bmp_image *bmp = ico_find(c->data.ico.ico, width, height);
	if (!bmp->decoded)
	  	if (bmp_decode(bmp) != BMP_OK)
			return false;
	c->bitmap = bmp->bitmap;
	return plot.bitmap(x, y, width, height, c->bitmap,
			background_colour, BITMAPF_NONE);
}

/** sets the bitmap for an ico according to the dimensions */

bool nsico_set_bitmap_from_size(hlcache_handle *h, int width, int height)
{
	struct content *c = hlcache_handle_get_content(h);
	struct bmp_image *bmp;

	assert(c != NULL);

	bmp = ico_find(c->data.ico.ico, width, height);
	if (bmp == NULL)
		return false;

	if ((bmp->decoded == false) && (bmp_decode(bmp) != BMP_OK))
		return false;

	c->bitmap = bmp->bitmap;

	return true;
}

bool nsico_redraw_tiled(struct content *c, int x, int y,
		int width, int height, const struct rect *clip,
		float scale, colour background_colour,
		bool repeat_x, bool repeat_y)
{
	struct bmp_image *bmp = ico_find(c->data.ico.ico, width, height);
	bitmap_flags_t flags = BITMAPF_NONE;

	if (!bmp->decoded)
		if (bmp_decode(bmp) != BMP_OK)
			return false;

	c->bitmap = bmp->bitmap;

	if (repeat_x)
		flags |= BITMAPF_REPEAT_X;
	if (repeat_y)
		flags |= BITMAPF_REPEAT_Y;

	return plot.bitmap(x, y, width, height, c->bitmap, background_colour, flags);
}


void nsico_destroy(struct content *c)
{
	ico_finalise(c->data.ico.ico);
	free(c->data.ico.ico);
}

bool nsico_clone(const struct content *old, struct content *new_content)
{
	/* Simply replay creation and conversion */
	if (nsico_create(new_content, NULL) == false)
		return false;

	if (old->status == CONTENT_STATUS_READY ||
			old->status == CONTENT_STATUS_DONE) {
		if (nsico_convert(new_content) == false)
			return false;
	}

	return true;
}

#endif