[dia] [gradient] interface definition DiaRenderer::set_pattern()

[Hans Breuer <hans src gnome org>]

commit a5b790b6f2ac4ae9725bb58890ff8c29f1d11a8e
Author: Hans Breuer <hans breuer org>
Date:   Tue Dec 24 15:16:07 2013 +0100

    [gradient] interface definition DiaRenderer::set_pattern()
    
    Step 3 of 7 for gradient support in Dia: renderer interface extension
    to detect pattern capability and use it.

 lib/diarenderer.c |   10 ++++++++++
 lib/diarenderer.h |    9 ++++++---
 lib/plug-ins.h    |    2 +-
 3 files changed, 17 insertions(+), 4 deletions(-)
---
diff --git a/lib/diarenderer.c b/lib/diarenderer.c
index 1be6227..f986b83 100644
--- a/lib/diarenderer.c
+++ b/lib/diarenderer.c
@@ -1532,6 +1532,16 @@ is_capable_to (DiaRenderer *renderer, RenderCapability cap)
   return FALSE;
 }
 
+/*!
+ * The base class has no pattern (gradient) support
+ */
+static void
+set_pattern (DiaRenderer *renderer, DiaPattern *pat)
+{
+  g_warning ("%s::set_pattern not implemented!", 
+             G_OBJECT_CLASS_NAME (G_OBJECT_GET_CLASS (renderer)));
+}
+
 /*
  * non member functions
  */
diff --git a/lib/diarenderer.h b/lib/diarenderer.h
index 2cce06c..8cc2857 100644
--- a/lib/diarenderer.h
+++ b/lib/diarenderer.h
@@ -32,9 +32,10 @@
 G_BEGIN_DECLS
 
 typedef enum {
-  RENDER_HOLES  = (1<<0),
-  RENDER_ALPHA  = (1<<1),
-  RENDER_AFFINE = (1<<2)
+  RENDER_HOLES   = (1<<0),
+  RENDER_ALPHA   = (1<<1),
+  RENDER_AFFINE  = (1<<2),
+  RENDER_PATTERN = (1<<3)
 } RenderCapability;
 
 /*! GObject boiler plate, create runtime information */
@@ -272,6 +273,8 @@ struct _DiaRendererClass
   /*! allows to adapt DiaObject implementations to certain renderer capabilities */
   gboolean (*is_capable_to) (DiaRenderer *renderer,
                             RenderCapability cap);
+  /*! fill with a pattern, currently only gradient */
+  void (*set_pattern) (DiaRenderer *renderer, DiaPattern *pat);
 };
 
 /*
diff --git a/lib/plug-ins.h b/lib/plug-ins.h
index a4c3e8d..3fa6665 100644
--- a/lib/plug-ins.h
+++ b/lib/plug-ins.h
@@ -52,7 +52,7 @@ G_BEGIN_DECLS
  *
  * \ingroup Plugins
  */
-#define DIA_PLUGIN_API_VERSION 18
+#define DIA_PLUGIN_API_VERSION 19
 
 typedef enum {
   DIA_PLUGIN_INIT_OK,