Experimental preview implementation using XShmGetImage.

Not hooked up yet.

1 files changed, 105 insertions, 0 deletions

diff --git a/lib/sugar/sugar-preview.c b/lib/sugar/sugar-preview.c
new file mode 100644
index 0000000..3cf938e
--- /dev/null
+++ b/lib/sugar/sugar-preview.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2007, Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <gdk/gdkx.h>
+#include <gtk/gtkwindow.h>
+
+#include "sugar-preview.h"
+
+static void sugar_preview_class_init (SugarPreviewClass *menu_class);
+static void sugar_preview_init       (SugarPreview *menu);
+
+G_DEFINE_TYPE(SugarPreview, sugar_preview, G_TYPE_OBJECT)
+
+gboolean
+sugar_preview_save(SugarPreview *preview, const char *file_name)
+{
+    GdkPixbuf *pixbuf;
+
+    if (preview->image != NULL) {
+        return FALSE;
+    }
+
+    pixbuf = gdk_pixbuf_get_from_image(NULL, preview->image, NULL,
+                                       0, 0, 0, 0,
+                                       preview->image->width,
+                                       preview->image->height);
+
+    gdk_pixbuf_save(pixbuf, file_name, "png", NULL);
+
+    if (preview->image != NULL) {
+        g_object_unref(G_OBJECT(preview->image));
+        preview->image = NULL;
+    }
+
+    return TRUE;
+}
+
+void
+sugar_preview_take_screenshot(SugarPreview *preview, GdkDrawable *drawable)
+{
+    GdkScreen *screen;
+    GdkVisual *visual;
+    GdkColormap *colormap;
+    gint width, height;
+
+    gdk_drawable_get_size(drawable, &width, &height);
+
+    screen = gdk_drawable_get_screen(drawable);
+    visual = gdk_drawable_get_visual(drawable);
+    colormap = gdk_drawable_get_colormap(drawable);
+
+    if (preview->image != NULL) {
+        g_object_unref(G_OBJECT(preview->image));
+    }
+
+    preview->image = gdk_image_new(GDK_IMAGE_SHARED, visual, width, height);
+    gdk_image_set_colormap(preview->image, colormap);
+
+    XShmGetImage(GDK_SCREEN_XDISPLAY(screen),
+                 GDK_DRAWABLE_XID(drawable),
+                 gdk_x11_image_get_ximage(preview->image),
+                 0, 0, AllPlanes, ZPixmap);
+}
+
+static void
+sugar_preview_dispose (GObject *object)
+{
+    SugarPreview *preview = SUGAR_PREVIEW(object);
+
+    if (preview->image != NULL) {
+        g_object_unref(G_OBJECT(preview->image));
+        preview->image = NULL;
+    }
+}
+
+
+static void
+sugar_preview_class_init(SugarPreviewClass *preview_class)
+{
+    GObjectClass *g_object_class = G_OBJECT_CLASS (preview_class);
+
+    g_object_class->dispose = sugar_preview_dispose;
+}
+
+static void
+sugar_preview_init(SugarPreview *preview)
+{
+    preview->image = NULL;
+}