[gimp] app: support clipboard images in the clipboard brush and pattern

[Michael Natterer <mitch src gnome org>]

commit 6eeb5c2ee2b6ea7041c00aaa9cb1a643dd719edb
Author: Michael Natterer <mitch gimp org>
Date:   Wed Apr 19 16:52:10 2017 -0300

    app: support clipboard images in the clipboard brush and pattern

 app/core/gimpbrushclipboard.c   |   26 +++++++++++++++++++-------
 app/core/gimppatternclipboard.c |   29 +++++++++++++++++++----------
 2 files changed, 38 insertions(+), 17 deletions(-)
---
diff --git a/app/core/gimpbrushclipboard.c b/app/core/gimpbrushclipboard.c
index 46fe5c4..3f9df75 100644
--- a/app/core/gimpbrushclipboard.c
+++ b/app/core/gimpbrushclipboard.c
@@ -30,11 +30,14 @@
 #include "gimpbrush-private.h"
 #include "gimpbrushclipboard.h"
 #include "gimpimage.h"
+#include "gimppickable.h"
 #include "gimptempbuf.h"
 
 #include "gimp-intl.h"
 
 
+#define BRUSH_MAX_SIZE 1024
+
 enum
 {
   PROP_0,
@@ -92,7 +95,6 @@ gimp_brush_clipboard_class_init (GimpBrushClipboardClass *klass)
 static void
 gimp_brush_clipboard_init (GimpBrushClipboard *brush)
 {
-  brush->gimp = NULL;
 }
 
 static void
@@ -177,7 +179,8 @@ static void
 gimp_brush_clipboard_changed (Gimp      *gimp,
                               GimpBrush *brush)
 {
-  GimpBuffer *gimp_buffer;
+  GimpObject *paste;
+  GeglBuffer *buffer = NULL;
   gint        width;
   gint        height;
 
@@ -193,16 +196,25 @@ gimp_brush_clipboard_changed (Gimp      *gimp,
       brush->priv->pixmap = NULL;
     }
 
-  gimp_buffer = gimp_get_clipboard_buffer (gimp);
+  paste = gimp_get_clipboard_object (gimp);
+
+  if (GIMP_IS_IMAGE (paste))
+    {
+      gimp_pickable_flush (GIMP_PICKABLE (paste));
+      buffer = gimp_pickable_get_buffer (GIMP_PICKABLE (paste));
+    }
+  else if (GIMP_IS_BUFFER (paste))
+    {
+      buffer = gimp_buffer_get_buffer (GIMP_BUFFER (paste));
+    }
 
-  if (gimp_buffer)
+  if (buffer)
     {
-      GeglBuffer *buffer = gimp_buffer_get_buffer (gimp_buffer);
       const Babl *format = gegl_buffer_get_format (buffer);
       GeglBuffer *dest_buffer;
 
-      width  = MIN (gimp_buffer_get_width  (gimp_buffer), 1024);
-      height = MIN (gimp_buffer_get_height (gimp_buffer), 1024);
+      width  = MIN (gegl_buffer_get_width  (buffer), BRUSH_MAX_SIZE);
+      height = MIN (gegl_buffer_get_height (buffer), BRUSH_MAX_SIZE);
 
       brush->priv->mask   = gimp_temp_buf_new (width, height,
                                                babl_format ("Y u8"));
diff --git a/app/core/gimppatternclipboard.c b/app/core/gimppatternclipboard.c
index 0ca30bc..932755a 100644
--- a/app/core/gimppatternclipboard.c
+++ b/app/core/gimppatternclipboard.c
@@ -35,6 +35,8 @@
 #include "gimp-intl.h"
 
 
+#define PATTERN_MAX_SIZE 1024
+
 enum
 {
   PROP_0,
@@ -92,7 +94,6 @@ gimp_pattern_clipboard_class_init (GimpPatternClipboardClass *klass)
 static void
 gimp_pattern_clipboard_init (GimpPatternClipboard *pattern)
 {
-  pattern->gimp = NULL;
 }
 
 static void
@@ -177,7 +178,8 @@ static void
 gimp_pattern_clipboard_changed (Gimp        *gimp,
                                 GimpPattern *pattern)
 {
-  GimpBuffer *gimp_buffer;
+  GimpObject *paste;
+  GeglBuffer *buffer = NULL;
 
   if (pattern->mask)
     {
@@ -185,20 +187,27 @@ gimp_pattern_clipboard_changed (Gimp        *gimp,
       pattern->mask = NULL;
     }
 
-  gimp_buffer = gimp_get_clipboard_buffer (gimp);
+  paste = gimp_get_clipboard_object (gimp);
 
-  if (gimp_buffer)
+  if (GIMP_IS_IMAGE (paste))
+    {
+      gimp_pickable_flush (GIMP_PICKABLE (paste));
+      buffer = gimp_pickable_get_buffer (GIMP_PICKABLE (paste));
+    }
+  else if (GIMP_IS_BUFFER (paste))
     {
-      gint width;
-      gint height;
+      buffer = gimp_buffer_get_buffer (GIMP_BUFFER (paste));
+    }
 
-      width  = MIN (gimp_buffer_get_width  (gimp_buffer), 1024);
-      height = MIN (gimp_buffer_get_height (gimp_buffer), 1024);
+  if (buffer)
+    {
+      gint width  = MIN (gegl_buffer_get_width  (buffer), PATTERN_MAX_SIZE);
+      gint height = MIN (gegl_buffer_get_height (buffer), PATTERN_MAX_SIZE);
 
       pattern->mask = gimp_temp_buf_new (width, height,
-                                         gimp_buffer_get_format (gimp_buffer));
+                                         gegl_buffer_get_format (buffer));
 
-      gegl_buffer_get (gimp_buffer_get_buffer (gimp_buffer),
+      gegl_buffer_get (buffer,
                        GEGL_RECTANGLE (0, 0, width, height), 1.0,
                        NULL,
                        gimp_temp_buf_get_data (pattern->mask),