[project @ 2006-03-25 23:31:41 by rjek]

Initial GTK thumbnail rendering implementation (still gets fonts too big)

svn path=/import/netsurf/; revision=2166

gtk/gtk_gui.c

@@ -215,14 +215,6 @@ void hotlist_visited(struct content *content)
 }
 
 
-struct history *history_create(void) { return 0; }
-void history_add(struct history *history, struct content *content,
-	char *frag_id) {}
-void history_update(struct history *history, struct content *content) {}
-void history_destroy(struct history *history) {}
-void history_back(struct browser_window *bw, struct history *history) {}
-void history_forward(struct browser_window *bw, struct history *history) {}
-
 void gui_401login_open(struct browser_window *bw, struct content *c,
 		const char *realm) {}
 void gui_cert_verify(struct browser_window *bw, struct content *c,

gtk/gtk_plotters.c

@@ -40,13 +40,15 @@ static bool nsgtk_plot_bitmap_tile(int x, int y, int width, int height,
 		bool repeat_x, bool repeat_y);
 static bool nsgtk_plot_group_start(const char *name);
 static bool nsgtk_plot_group_end(void);
-
 static void nsgtk_set_colour(colour c);
 static void nsgtk_set_solid(void);	/**< Set for drawing solid lines */
 static void nsgtk_set_dotted(void);	/**< Set for drawing dotted lines */
 static void nsgtk_set_dashed(void);	/**< Set for drawing dashed lines */
+void nsgtk_plot_set_scale(float s);
+float nsgtk_plot_get_scale(void);
 
 static GdkRectangle cliprect;
+static float nsgtk_plot_scale = 1.0;
 
 struct plotter_table plot;
 
@@ -386,3 +388,14 @@ void nsgtk_set_dashed()
 		GDK_CAP_BUTT, GDK_JOIN_MITER);
 #endif
 }
+
+void nsgtk_plot_set_scale(float s)
+{
+	nsgtk_plot_scale = s;
+}
+
+float nsgtk_plot_get_scale(void)
+{
+	return nsgtk_plot_scale;
+}
+

gtk/gtk_thumbnail.c

@@ -0,0 +1,91 @@
+/*
+ * 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 2006 Rob Kendrick <rjek@rjek.com>
+ */
+
+/** \file
+ * Page thumbnail creation (implementation).
+ *
+ * Thumbnails are created by setting the current drawing contexts to the
+ * bitmap (a gdk pixbuf) we are passed, and plotting the page at a small
+ * scale.
+ */
+
+#include <assert.h>
+#include <gtk/gtk.h>
+#include "netsurf/content/content.h"
+#include "netsurf/content/url_store.h"
+#include "netsurf/desktop/plotters.h"
+#include "netsurf/desktop/browser.h"
+#include "netsurf/image/bitmap.h"
+#include "netsurf/render/font.h"
+#include "netsurf/utils/log.h"
+#include "netsurf/gtk/gtk_window.h"
+#include "netsurf/gtk/gtk_plotters.h"
+
+/**
+ * Create a thumbnail of a page.
+ *
+ * \param  content  content structure to thumbnail
+ * \param  bitmap   the bitmap to draw to
+ * \param  url      the URL the thumnail belongs to, or NULL
+ */
+bool thumbnail_create(struct content *content, struct bitmap *bitmap,
+		const char *url)
+{
+	GdkPixbuf *pixbuf = (GdkPixbuf *) bitmap;
+	gint width = gdk_pixbuf_get_width(pixbuf);
+	gint height = gdk_pixbuf_get_height(pixbuf);
+	gint depth = (gdk_screen_get_system_visual(gdk_screen_get_default()))->depth;
+	GdkPixmap *pixmap = gdk_pixmap_new(NULL, width, height, depth);
+	GdkColor c = { 0, 65535, 65535, 65535 };
+	float scale = 1.0;
+
+	assert(content);
+	assert(bitmap);
+
+	gdk_drawable_set_colormap(pixmap, gdk_colormap_get_system());
+
+	/* set the plotting functions up */
+	plot = nsgtk_plotters;
+
+	if (content->width)
+		scale = (float)width / (float)content->width;
+	nsgtk_plot_set_scale(scale);
+
+	/* set to plot to pixmap */
+	current_drawable = pixmap;
+	current_gc = gdk_gc_new(current_drawable);
+#ifdef CAIRO_VERSION
+	current_cr = gdk_cairo_create(current_drawable);
+#endif
+
+	/* render the content */
+	content_redraw(content, 0, 0, width, height,
+			0, 0, width, height, scale, 0xFFFFFF);
+
+	/* copy thumbnail to pixbuf we've been passed */
+	gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0,
+					width, height);
+
+	/* As a debugging aid, try this to dump out a copy of the thumbnail as a PNG:
+	 * gdk_pixbuf_save(pixbuf, "thumbnail.png", "png", NULL, NULL);
+	 */
+
+	/* register the thumbnail with the URL */
+	if (url)
+	  url_store_add_thumbnail(url, bitmap);
+
+	bitmap_modified(bitmap);
+
+	g_object_unref(current_gc);
+#ifdef CAIRO_VERSION
+	cairo_destroy(current_cr);
+#endif
+	g_object_unref(pixmap);
+
+	return true;
+}
+

gtk/gtk_window.c

@@ -188,6 +188,7 @@ gboolean gui_window_expose_event(GtkWidget *widget,
 #endif
 
 	plot = nsgtk_plotters;
+	nsgtk_plot_set_scale(1.0);
 
 	content_redraw(c, 0, 0,
 			widget->allocation.width,

gtk/gtk_window.h

@@ -15,3 +15,6 @@ extern GdkGC *current_gc;
 extern cairo_t *current_cr;
 #endif
 
+void nsgtk_plot_set_scale(float s);
+float nsgtk_plot_get_scale(void);
+