webrender 0.60.0

A GPU accelerated 2D renderer for web content
Documentation 
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commit 3b2591abfeb07c50140b0e188e41f76fa942ae0a
Author: Nicolas Silva <nical@fastmail.com>
Date:   Tue Aug 28 11:20:15 2018 +0200

    Expose low priority transactions in the API.

diff --git a/webrender/src/render_backend.rs b/webrender/src/render_backend.rs
index ccc779c9..be76f8cc 100644
--- a/webrender/src/render_backend.rs
+++ b/webrender/src/render_backend.rs
@@ -763,6 +763,7 @@ impl RenderBackend {
                             resource_updates,
                             generate_frame: render,
                             use_scene_builder_thread: false,
+                            low_priority: false,
                         };
 
                         self.resource_cache.add_rasterized_blob_images(rasterized_blobs);
diff --git a/webrender_api/src/api.rs b/webrender_api/src/api.rs
index 8debdd35..6f9de5e6 100644
--- a/webrender_api/src/api.rs
+++ b/webrender_api/src/api.rs
@@ -56,6 +56,8 @@ pub struct Transaction {
     use_scene_builder_thread: bool,
 
     generate_frame: bool,
+
+    low_priority: bool,
 }
 
 impl Transaction {
@@ -67,6 +69,7 @@ impl Transaction {
             payloads: Vec::new(),
             use_scene_builder_thread: false, // TODO: make this true by default.
             generate_frame: false,
+            low_priority: false,
         }
     }
 
@@ -256,6 +259,7 @@ impl Transaction {
                 resource_updates: self.resource_updates,
                 use_scene_builder_thread: self.use_scene_builder_thread,
                 generate_frame: self.generate_frame,
+                low_priority: self.low_priority,
             },
             self.payloads,
         )
@@ -337,6 +341,10 @@ impl Transaction {
         self.resource_updates.push(ResourceUpdate::DeleteFontInstance(key));
     }
 
+    pub fn mark_low_priority(&mut self) {
+        self.low_priority = true;
+    }
+
     pub fn merge(&mut self, mut other: Vec<ResourceUpdate>) {
         self.resource_updates.append(&mut other);
     }
@@ -354,6 +362,7 @@ pub struct TransactionMsg {
     pub resource_updates: Vec<ResourceUpdate>,
     pub generate_frame: bool,
     pub use_scene_builder_thread: bool,
+    pub low_priority: bool,
 }
 
 impl TransactionMsg {
@@ -372,6 +381,7 @@ impl TransactionMsg {
             resource_updates: Vec::new(),
             generate_frame: false,
             use_scene_builder_thread: false,
+            low_priority: false,
         }
     }
 
@@ -382,6 +392,7 @@ impl TransactionMsg {
             resource_updates: Vec::new(),
             generate_frame: false,
             use_scene_builder_thread: false,
+            low_priority: false,
         }
     }
 }