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/*
* This file is part of NetSurf, http://netsurf.sourceforge.net/
* Licensed under the GNU General Public License,
* http://www.opensource.org/licenses/gpl-license
* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
*/
/** \file
* Page thumbnail creation (implementation).
*
* Thumbnails are created by redirecting output to a sprite and rendering the
* page at a small scale.
*/
#include "oslib/colourtrans.h"
#include "oslib/osspriteop.h"
#include "netsurf/content/content.h"
#include "netsurf/riscos/thumbnail.h"
#include "netsurf/utils/log.h"
/**
* Create a thumbnail of a page.
*
* \param content content structure to thumbnail
* \param area sprite area containing thumbnail sprite
* \param sprite pointer to sprite
* \param width sprite width / pixels
* \param height sprite height / pixels
*
* The thumbnail is rendered in the given sprite.
*/
void thumbnail_create(struct content *content, osspriteop_area *area,
osspriteop_header *sprite, int width, int height)
{
float scale;
os_error *error;
scale = (float) width / (float) content->width;
/* switch output to sprite */
error = xosspriteop_switch_output_to_sprite(osspriteop_PTR, area,
(osspriteop_id) sprite, 0, 0, 0, 0, 0);
if (error) {
LOG(("xosspriteop_switch_output_to_sprite failed: %s",
error->errmess));
return;
}
/* clear background to white */
colourtrans_set_gcol(os_COLOUR_WHITE, colourtrans_SET_BG,
os_ACTION_OVERWRITE, 0);
os_clg();
/* render content */
content_redraw(content, 0, height * 2, width * 2, height * 2,
0, 0, width * 2, height * 2, scale);
/* switch output back to screen */
error = xosspriteop_switch_output_to_sprite(osspriteop_PTR, area,
0, 0, 0, 0, 0, 0);
if (error) {
LOG(("xosspriteop_switch_output_to_sprite failed: %s",
error->errmess));
return;
}
}
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