[evince] [libdocument] Add specific method to get a loading thumbnail

[Carlos Garcia Campos <carlosgc src gnome org>]

commit d02aafbc4423ead5b00e452452643e076c4fa2e8
Author: Carlos Garcia Campos <carlosgc gnome org>
Date:   Tue May 4 11:29:47 2010 +0200

    [libdocument] Add specific method to get a loading thumbnail
    
    It allows getting a loading thumbnail with inverted colors. See
    bug #616111.

 libdocument/ev-document-misc.c |   31 +++++++++++++++++++++++++------
 libdocument/ev-document-misc.h |    3 +++
 2 files changed, 28 insertions(+), 6 deletions(-)
---
diff --git a/libdocument/ev-document-misc.c b/libdocument/ev-document-misc.c
index 4d8bc28..605cbb0 100644
--- a/libdocument/ev-document-misc.c
+++ b/libdocument/ev-document-misc.c
@@ -32,10 +32,11 @@
  * NULL, then it will fill the return pixbuf with the contents of
  * source_pixbuf.
  */
-GdkPixbuf *
-ev_document_misc_get_thumbnail_frame (int        width,
-				      int        height,
-				      GdkPixbuf *source_pixbuf)
+static GdkPixbuf *
+create_thumbnail_frame (int        width,
+			int        height,
+			GdkPixbuf *source_pixbuf,
+			gboolean   fill_bg)
 {
 	GdkPixbuf *retval;
 	guchar *data;
@@ -67,8 +68,10 @@ ev_document_misc_get_thumbnail_frame (int        width,
 	rowstride = gdk_pixbuf_get_rowstride (retval);
 
 	gdk_pixbuf_fill (retval, 0x000000ff);
-	for (i = 1; i < height_r + 1; i++)
-		memset (data + (rowstride * i) + 4, 0xffffffff, width_r * 4);
+	if (fill_bg) {
+		for (i = 1; i < height_r + 1; i++)
+			memset (data + (rowstride * i) + 4, 0xffffffff, width_r * 4);
+	}
 
 	/* copy the source pixbuf */
 	if (source_pixbuf)
@@ -91,6 +94,22 @@ ev_document_misc_get_thumbnail_frame (int        width,
 	return retval;
 }
 
+GdkPixbuf *
+ev_document_misc_get_thumbnail_frame (int        width,
+				      int        height,
+				      GdkPixbuf *source_pixbuf)
+{
+	return create_thumbnail_frame (width, height, source_pixbuf, TRUE);
+}
+
+GdkPixbuf *
+ev_document_misc_get_loading_thumbnail (int      width,
+					int      height,
+					gboolean inverted_colors)
+{
+	return create_thumbnail_frame (width, height, NULL, !inverted_colors);
+}
+
 void
 ev_document_misc_get_page_border_size (gint       page_width,
 				       gint       page_height,
diff --git a/libdocument/ev-document-misc.h b/libdocument/ev-document-misc.h
index 2503aa7..b09c194 100644
--- a/libdocument/ev-document-misc.h
+++ b/libdocument/ev-document-misc.h
@@ -36,6 +36,9 @@ G_BEGIN_DECLS
 GdkPixbuf *ev_document_misc_get_thumbnail_frame  (int           width,
 						  int           height,
 						  GdkPixbuf    *source_pixbuf);
+GdkPixbuf *ev_document_misc_get_loading_thumbnail (int      width,
+						   int      height,
+						   gboolean inverted_colors);
 void       ev_document_misc_get_page_border_size (gint          page_width,
 						  gint          page_height,
 						  GtkBorder    *border);