Update webrender + shaders.

components/util/opts.rs

@@ -200,6 +200,11 @@ pub struct Opts {
     /// True to show webrender debug on screen.
     pub webrender_debug: bool,
 
+    /// True to compile all webrender shaders at init time. This is mostly
+    /// useful when modifying the shaders, to ensure they all compile
+    /// after each change is made.
+    pub precache_shaders: bool,
+
     /// True if WebRender should use multisample antialiasing.
     pub use_msaa: bool,
 
@@ -313,6 +318,10 @@ pub struct DebugOptions {
     // don't skip any backtraces on panic
     pub full_backtraces: bool,
 
+    /// True to compile all webrender shaders at init time. This is mostly
+    /// useful when modifying the shaders, to ensure they all compile
+    /// after each change is made.
+    pub precache_shaders: bool,
 }
 
 
@@ -351,6 +360,7 @@ impl DebugOptions {
                 "wr-debug" => debug_options.webrender_debug = true,
                 "msaa" => debug_options.use_msaa = true,
                 "full-backtraces" => debug_options.full_backtraces = true,
+                "precache-shaders" => debug_options.precache_shaders = true,
                 "" => {},
                 _ => return Err(option)
             };
@@ -400,6 +410,7 @@ pub fn print_debug_usage(app: &str) -> ! {
     print_option("msaa", "Use multisample antialiasing in WebRender.");
     print_option("full-backtraces", "Print full backtraces for all errors");
     print_option("wr-debug", "Display webrender tile borders. Must be used with -w option.");
+    print_option("precache-shaders", "Compile all shaders during init. Must be used with -w option.");
 
     println!("");
 
@@ -537,6 +548,7 @@ pub fn default_opts() -> Opts {
         full_backtraces: false,
         is_printing_version: false,
         webrender_debug: false,
+        precache_shaders: false,
     }
 }
 
@@ -849,6 +861,7 @@ pub fn from_cmdline_args(args: &[String]) -> ArgumentParsingResult {
         full_backtraces: debug_options.full_backtraces,
         is_printing_version: is_printing_version,
         webrender_debug: debug_options.webrender_debug,
+        precache_shaders: debug_options.precache_shaders,
     };
 
     set_defaults(opts);