From 7897a98a4c7475e116f406ab173139c959d6dfb6 Mon Sep 17 00:00:00 2001
From: James Bursa <james@netsurf-browser.org>
Date: Wed, 25 Feb 2004 15:12:58 +0000
Subject: [project @ 2004-02-25 15:12:57 by bursa] Implement scaling; rewrite
 desktop/browser; add riscos/thumbnail; rewrite history.

svn path=/import/netsurf/; revision=566
---
 riscos/thumbnail.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 riscos/thumbnail.c

(limited to 'riscos/thumbnail.c')

diff --git a/riscos/thumbnail.c b/riscos/thumbnail.c
new file mode 100644
index 000000000..2f5b8d868
--- /dev/null
+++ b/riscos/thumbnail.c
@@ -0,0 +1,68 @@
+/*
+ * 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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