mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-12-26 22:09:43 +03:00
96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/*
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* This file is part of NetSurf, http://netsurf.sourceforge.net/
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* Licensed under the GNU General Public License,
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* http://www.opensource.org/licenses/gpl-license
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* Copyright 2006 Rob Kendrick <rjek@rjek.com>
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*/
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/** \file
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* Page thumbnail creation (implementation).
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*
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* Thumbnails are created by setting the current drawing contexts to the
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* bitmap (a gdk pixbuf) we are passed, and plotting the page at a small
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* scale.
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*/
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#include <assert.h>
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#include <gtk/gtk.h>
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#include "netsurf/content/content.h"
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#include "netsurf/content/urldb.h"
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#include "netsurf/desktop/plotters.h"
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#include "netsurf/desktop/browser.h"
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#include "netsurf/image/bitmap.h"
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#include "netsurf/render/font.h"
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#include "netsurf/utils/log.h"
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#include "netsurf/gtk/gtk_window.h"
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#include "netsurf/gtk/gtk_plotters.h"
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/**
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* Create a thumbnail of a page.
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*
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* \param content content structure to thumbnail
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* \param bitmap the bitmap to draw to
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* \param url the URL the thumnail belongs to, or NULL
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*/
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bool thumbnail_create(struct content *content, struct bitmap *bitmap,
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const char *url)
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{
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GdkPixbuf *pixbuf = (GdkPixbuf *) bitmap;
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gint width = gdk_pixbuf_get_width(pixbuf);
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gint height = gdk_pixbuf_get_height(pixbuf);
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gint depth = (gdk_screen_get_system_visual(gdk_screen_get_default()))->depth;
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GdkPixmap *pixmap = gdk_pixmap_new(NULL, content->width, content->width, depth);
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GdkPixbuf *big;
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assert(content);
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assert(bitmap);
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gdk_drawable_set_colormap(pixmap, gdk_colormap_get_system());
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/* set the plotting functions up */
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plot = nsgtk_plotters;
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nsgtk_plot_set_scale(1.0);
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/* set to plot to pixmap */
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current_drawable = pixmap;
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current_gc = gdk_gc_new(current_drawable);
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#ifdef CAIRO_VERSION
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current_cr = gdk_cairo_create(current_drawable);
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#endif
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plot.fill(0, 0, content->width, content->width, 0xffffffff);
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/* render the content */
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content_redraw(content, 0, 0, content->width, content->width,
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0, 0, content->width, content->width, 1.0, 0xFFFFFF);
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/* resample the large plot down to the size of our thumbnail */
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big = gdk_pixbuf_get_from_drawable(NULL, pixmap, NULL, 0, 0, 0, 0,
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content->width, content->width);
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gdk_pixbuf_scale(big, pixbuf, 0, 0, width, height, 0, 0,
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(double)width / (double)content->width,
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(double)height / (double)content->width,
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GDK_INTERP_TILES);
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/* As a debugging aid, try this to dump out a copy of the thumbnail as
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* a PNG: gdk_pixbuf_save(pixbuf, "thumbnail.png", "png", NULL, NULL);
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*/
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/* register the thumbnail with the URL */
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if (url)
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urldb_set_thumbnail(url, bitmap);
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bitmap_modified(bitmap);
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g_object_unref(current_gc);
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#ifdef CAIRO_VERSION
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cairo_destroy(current_cr);
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#endif
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g_object_unref(pixmap);
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g_object_unref(big);
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return true;
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}
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