From bda90f63c1194a312426eb2528f37f505672d8f9 Mon Sep 17 00:00:00 2001
From: Ray Strode <rstrode@redhat.com>
Date: Thu, 8 Oct 2009 15:59:15 -0400
Subject: [PATCH 1/2] [renderer] make map and unmap idempotent

---
 src/libplybootsplash/ply-renderer.c |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/src/libplybootsplash/ply-renderer.c b/src/libplybootsplash/ply-renderer.c
index 0966418..7c6695f 100644
--- a/src/libplybootsplash/ply-renderer.c
+++ b/src/libplybootsplash/ply-renderer.c
@@ -54,6 +54,7 @@ struct _ply_renderer
   ply_console_t *console;
 
   uint32_t input_source_is_open : 1;
+  uint32_t is_mapped : 1;
 };
 
 typedef const ply_renderer_plugin_interface_t *
@@ -199,7 +200,12 @@ ply_renderer_map_to_device (ply_renderer_t *renderer)
   assert (renderer != NULL);
   assert (renderer->plugin_interface != NULL);
 
-  return renderer->plugin_interface->map_to_device (renderer->backend);
+  if (renderer->is_mapped)
+    return true;
+
+  renderer->is_mapped = renderer->plugin_interface->map_to_device (renderer->backend);
+
+  return renderer->is_mapped;
 }
 
 static void
@@ -208,7 +214,11 @@ ply_renderer_unmap_from_device (ply_renderer_t *renderer)
   assert (renderer != NULL);
   assert (renderer->plugin_interface != NULL);
 
+  if (!renderer->is_mapped)
+    return;
+
   renderer->plugin_interface->unmap_from_device (renderer->backend);
+  renderer->is_mapped = false;
 }
 
 bool
-- 
1.6.5.rc2


From 89f07b8f81da2eddf31758d990d9cb262f2ba0ae Mon Sep 17 00:00:00 2001
From: Ray Strode <rstrode@redhat.com>
Date: Thu, 8 Oct 2009 16:01:56 -0400
Subject: [PATCH 2/2] [renderer] map buffer lazily

This is to prevent screen clears on plugins that don't
use the renderers (text plugins)
---
 src/libplybootsplash/ply-renderer.c |   11 +++--------
 1 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/src/libplybootsplash/ply-renderer.c b/src/libplybootsplash/ply-renderer.c
index 7c6695f..591af2c 100644
--- a/src/libplybootsplash/ply-renderer.c
+++ b/src/libplybootsplash/ply-renderer.c
@@ -264,14 +264,6 @@ ply_renderer_open (ply_renderer_t *renderer)
           continue;
         }
 
-      if (!ply_renderer_map_to_device (renderer))
-        {
-          ply_trace ("could not map renderer to device for plugin %s",
-                     plugin_path);
-          ply_renderer_close_device (renderer);
-          ply_renderer_unload_plugin (renderer);
-          continue;
-        }
       return true;
   }
 
@@ -314,6 +306,9 @@ ply_renderer_flush_head (ply_renderer_t      *renderer,
   assert (renderer->plugin_interface != NULL);
   assert (head != NULL);
 
+  if (!ply_renderer_map_to_device (renderer))
+    return;
+
   renderer->plugin_interface->flush_head (renderer->backend, head);
 }
 
-- 
1.6.5.rc2