From bd48a052a3b621233438bce25915aa3360502730 Mon Sep 17 00:00:00 2001 From: Michael Drake Date: Sat, 19 Feb 2011 22:15:43 +0000 Subject: Add core thumbnail redraw functions. svn path=/trunk/netsurf/; revision=11715 --- desktop/thumbnail.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++++++++ desktop/thumbnail.h | 67 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 144 insertions(+) create mode 100644 desktop/thumbnail.c create mode 100644 desktop/thumbnail.h (limited to 'desktop') diff --git a/desktop/thumbnail.c b/desktop/thumbnail.c new file mode 100644 index 000000000..ce36fdf1d --- /dev/null +++ b/desktop/thumbnail.c @@ -0,0 +1,77 @@ +/* + * Copyright 2011 Michael Drake + * + * 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 . + */ + +/** \file + * Core thumbnail handling (implementation). + */ + +#include +#include + +#include "content/content.h" +#include "content/hlcache.h" +#include "desktop/browser.h" +#include "desktop/options.h" +#include "desktop/plotters.h" +#include "desktop/thumbnail.h" +#include "utils/log.h" + + +/* exported interface, documented in thumbnail.h */ +bool thumbnail_redraw(struct hlcache_handle *content, + int width, int height) +{ + struct rect clip; + float scale; + + assert(content); + + /* No selection */ + current_redraw_browser = NULL; + + /* Set clip rectangle to required thumbnail size */ + clip.x0 = 0; + clip.y0 = 0; + clip.x1 = width; + clip.y1 = height; + + plot.clip(&clip); + + /* Plot white background */ + plot.rectangle(clip.x0, clip.y0, clip.x1, clip.y1, + plot_style_fill_white); + + /* Find the scale we're using */ + scale = thumbnail_get_redraw_scale(content, width); + + /* Render the content */ + return content_redraw(content, 0, 0, width, height, &clip, scale, + 0xFFFFFF); +} + + +/* exported interface, documented in thumbnail.h */ +float thumbnail_get_redraw_scale(struct hlcache_handle *content, int width) +{ + assert(content); + + if (content_get_width(content)) + return (float)width / (float)content_get_width(content); + else + return 1.0; +} diff --git a/desktop/thumbnail.h b/desktop/thumbnail.h new file mode 100644 index 000000000..c4700547f --- /dev/null +++ b/desktop/thumbnail.h @@ -0,0 +1,67 @@ +/* + * Copyright 2011 Michael Drake + * + * 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 . + */ + +/** \file + * Thumbail handling (interface). + */ + +#ifndef _NETSURF_DESKTOP_THUMBNAIL_H_ +#define _NETSURF_DESKTOP_THUMBNAIL_H_ + +#include + +struct hlcache_handle; +struct bitmap; + + +/** + * Redraw a content for thumbnailing + * + * Calls the redraw function for the content, + * + * \param content The content to redraw for thumbnail + * \param width The thumbnail width + * \param height The thumbnail height + * \return true if successful, false otherwise + * + * The thumbnail is guaranteed to be filled to its width/height extents, so + * there is no need to render a solid background first. + * + * Units for width and height are pixels. + */ +bool thumbnail_redraw(struct hlcache_handle *content, + int width, int height); + +/** + * Get scale at which thumbnail will be rendered for a given content and + * thumbnail size. + * + * \param content The content to redraw for thumbnail + * \param width The thumbnail width + * \return scale thumbnail will be rendered at + * + * Units for width and height are pixels. + */ +float thumbnail_get_redraw_scale(struct hlcache_handle *content, int width); + + +/* In platform specific thumbnail.c. */ +bool thumbnail_create(struct hlcache_handle *content, struct bitmap *bitmap, + const char *url); + +#endif -- cgit v1.2.3