[goffice] GOImage: add format info getter.

[Morten Welinder <mortenw src gnome org>]

commit 2078655041b9e167db4eef462d9732edfbc1047a
Author: Morten Welinder <terra gnome org>
Date:   Sat Feb 28 17:30:00 2015 -0500

    GOImage: add format info getter.

 ChangeLog                |    4 ++++
 goffice/utils/go-image.c |   22 ++++++++++++++++++++++
 goffice/utils/go-image.h |    2 ++
 3 files changed, 28 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index f8ca46e..ddeb493 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2015-02-28  Morten Welinder  <terra gnome org>
+
+       * goffice/utils/go-image.c (go_image_get_info): New function.
+
 2015-02-28  Jean Brefort  <jean brefort normalesup org>
 
        * goffice/utils/go-image.c (go_image_new_from_data): ensure that GOPixbuf
diff --git a/goffice/utils/go-image.c b/goffice/utils/go-image.c
index 8c46650..ead687d 100644
--- a/goffice/utils/go-image.c
+++ b/goffice/utils/go-image.c
@@ -828,3 +828,25 @@ go_image_get_default_dpi (double *dpi_x, double *dpi_y)
        *dpi_x = _go_image_dpi_x;
        *dpi_y = _go_image_dpi_y;
 }
+
+GOImageFormatInfo const *
+go_image_get_info (GOImage *image)
+{
+       if (GO_IS_PIXBUF (image)) {
+               GOImageFormat f;
+               char *typ;
+               g_object_get (image, "image-type", &typ, NULL);
+               f = go_image_get_format_from_name (typ);
+               g_free (typ);
+               return go_image_get_format_info (f);
+       }
+
+       /* Dubious */
+       if (GO_IS_EMF (image))
+               return go_image_get_format_info (GO_IMAGE_FORMAT_EMF);
+       if (GO_IS_SVG (image))
+               return go_image_get_format_info (GO_IMAGE_FORMAT_SVG);
+       if (GO_IS_SPECTRE (image))
+               return go_image_get_format_info (GO_IMAGE_FORMAT_EPS);
+       return NULL;
+}
diff --git a/goffice/utils/go-image.h b/goffice/utils/go-image.h
index 923331f..28f7e03 100644
--- a/goffice/utils/go-image.h
+++ b/goffice/utils/go-image.h
@@ -115,6 +115,8 @@ double               go_image_get_height            (GOImage const *image);
 void            go_image_set_default_dpi       (double dpi_x, double dpi_y);
 void            go_image_get_default_dpi       (double *dpi_x, double *dpi_y);
 
+GOImageFormatInfo const *go_image_get_info      (GOImage *image);
+
 /* Protected */
 void            _go_image_changed              (GOImage *image, double width, double height);