[gimp] Bug 690728: file-gif-save plug-in crops the actual image the user is working on.

[Jehan PagÃs <jehanp src gnome org>]

commit 9fa112f6b3546447137af14ec800ffd4ebe8a325
Author: Jehan <jehan girinstud io>
Date:   Wed Dec 26 17:41:20 2012 +0900

    Bug 690728: file-gif-save plug-in crops the actual image the user is working on.
    
    Destructive behavior fixed by duplicating the image first, then deleting
    the duplicate at the end.

 plug-ins/common/file-gif-save.c |   26 ++++++++++++++++++--------
 1 files changed, 18 insertions(+), 8 deletions(-)
---
diff --git a/plug-ins/common/file-gif-save.c b/plug-ins/common/file-gif-save.c
index ae4f1e8..c11c777 100644
--- a/plug-ins/common/file-gif-save.c
+++ b/plug-ins/common/file-gif-save.c
@@ -104,7 +104,7 @@ static gboolean  save_image            (const gchar      *filename,
                                         GError          **error);
 
 static GimpPDBStatusType sanity_check  (const gchar      *filename,
-                                        gint32            image_ID,
+                                        gint32           *image_ID,
                                         GError          **error);
 static gboolean bad_bounds_dialog      (void);
 
@@ -210,7 +210,7 @@ run (const gchar      *name,
   if (strcmp (name, SAVE_PROC) == 0)
     {
       const gchar *filename;
-      gint32       image_ID;
+      gint32       image_ID, sanitized_image_ID = 0;
       gint32       drawable_ID;
       gint32       orig_image_ID;
 
@@ -222,11 +222,15 @@ run (const gchar      *name,
           run_mode == GIMP_RUN_WITH_LAST_VALS)
         gimp_ui_init (PLUG_IN_BINARY, FALSE);
 
-      status = sanity_check (filename, image_ID, &error);
+      status = sanity_check (filename, &image_ID, &error);
 
       /* Get the export options */
       if (status == GIMP_PDB_SUCCESS)
         {
+          /* If the sanity check succeeded, the image_ID will point to
+           * a duplicate image to delete later. */
+          sanitized_image_ID = image_ID;
+
           switch (run_mode)
             {
             case GIMP_RUN_INTERACTIVE:
@@ -284,6 +288,8 @@ run (const gchar      *name,
             if (export == GIMP_EXPORT_CANCEL)
               {
                 values[0].data.d_status = GIMP_PDB_CANCEL;
+                if (sanitized_image_ID)
+                  gimp_image_delete (sanitized_image_ID);
                 return;
               }
           }
@@ -306,6 +312,8 @@ run (const gchar      *name,
             {
               status = GIMP_PDB_EXECUTION_ERROR;
             }
+
+          gimp_image_delete (sanitized_image_ID);
         }
 
       if (export == GIMP_EXPORT_EXPORT)
@@ -566,7 +574,7 @@ parse_disposal_tag (const gchar *str)
 
 static GimpPDBStatusType
 sanity_check (const gchar  *filename,
-              gint32        image_ID,
+              gint32       *image_ID,
               GError      **error)
 {
   gint32 *layers;
@@ -575,8 +583,8 @@ sanity_check (const gchar  *filename,
   gint    image_height;
   gint    i;
 
-  image_width  = gimp_image_width (image_ID);
-  image_height = gimp_image_height (image_ID);
+  image_width  = gimp_image_width (*image_ID);
+  image_height = gimp_image_height (*image_ID);
 
   if (image_width > G_MAXUSHORT || image_height > G_MAXUSHORT)
     {
@@ -592,7 +600,8 @@ sanity_check (const gchar  *filename,
   /*** Iterate through the layers to make sure they're all ***/
   /*** within the bounds of the image                      ***/
 
-  layers = gimp_image_get_layers (image_ID, &nlayers);
+  *image_ID = gimp_image_duplicate (*image_ID);
+  layers = gimp_image_get_layers (*image_ID, &nlayers);
 
   for (i = 0; i < nlayers; i++)
     {
@@ -615,11 +624,12 @@ sanity_check (const gchar  *filename,
            */
           if ((run_mode == GIMP_RUN_NONINTERACTIVE) || bad_bounds_dialog ())
             {
-              gimp_image_crop (image_ID, image_width, image_height, 0, 0);
+              gimp_image_crop (*image_ID, image_width, image_height, 0, 0);
               return GIMP_PDB_SUCCESS;
             }
           else
             {
+              gimp_image_delete (*image_ID);
               return GIMP_PDB_CANCEL;
             }
         }