Update webrender + shaders.

components/servo/Cargo.lock

@@ -2644,7 +2644,7 @@ dependencies = [
 [[package]]
 name = "webrender"
 version = "0.5.1"
-source = "git+https://github.com/servo/webrender#db07ba36d02570b3fc70e9b31df7b09af3009abe"
+source = "git+https://github.com/servo/webrender#37dab545df3a9b6aa5e762f59272eb3d37227476"
 dependencies = [
  "app_units 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bincode 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2669,7 +2669,7 @@ dependencies = [
 [[package]]
 name = "webrender_traits"
 version = "0.5.1"
-source = "git+https://github.com/servo/webrender#db07ba36d02570b3fc70e9b31df7b09af3009abe"
+source = "git+https://github.com/servo/webrender#37dab545df3a9b6aa5e762f59272eb3d37227476"
 dependencies = [
  "app_units 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",

components/servo/lib.rs

@@ -156,6 +156,8 @@ impl<Window> Browser<Window> where Window: WindowMethods + 'static {
                         enable_profiler: opts.webrender_stats,
                         debug: opts.webrender_debug,
                         enable_recording: false,
+                        precache_shaders: opts.precache_shaders,
+                        enable_scrollbars: opts.output_file.is_none(),
                     });
                 (Some(webrender), Some(webrender_sender))
             } else {

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);

ports/cef/Cargo.lock

@@ -2504,7 +2504,7 @@ dependencies = [
 [[package]]
 name = "webrender"
 version = "0.5.1"
-source = "git+https://github.com/servo/webrender#db07ba36d02570b3fc70e9b31df7b09af3009abe"
+source = "git+https://github.com/servo/webrender#37dab545df3a9b6aa5e762f59272eb3d37227476"
 dependencies = [
  "app_units 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bincode 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2529,7 +2529,7 @@ dependencies = [
 [[package]]
 name = "webrender_traits"
 version = "0.5.1"
-source = "git+https://github.com/servo/webrender#db07ba36d02570b3fc70e9b31df7b09af3009abe"
+source = "git+https://github.com/servo/webrender#37dab545df3a9b6aa5e762f59272eb3d37227476"
 dependencies = [
  "app_units 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",

resources/shaders/prim_shared.glsl

@@ -30,7 +30,15 @@
 #define MAX_STOPS_PER_ANGLE_GRADIENT 8
 
 #ifdef WR_VERTEX_SHADER
+
+#define VECS_PER_LAYER      13
+#define LAYERS_PER_ROW      (WR_MAX_VERTEX_TEXTURE_WIDTH / VECS_PER_LAYER)
+
+#define VECS_PER_TILE       2
+#define TILES_PER_ROW       (WR_MAX_VERTEX_TEXTURE_WIDTH / VECS_PER_TILE)
+
 uniform sampler2D sLayers;
+uniform sampler2D sRenderTasks;
 
 struct Layer {
     mat4 transform;
@@ -43,10 +51,6 @@ layout(std140) uniform Data {
     vec4 data[WR_MAX_UBO_VECTORS];
 };
 
-layout(std140) uniform Tiles {
-    vec4 tiles[WR_MAX_UBO_VECTORS];
-};
-
 Layer fetch_layer(int index) {
     Layer layer;
 
@@ -54,8 +58,11 @@ Layer fetch_layer(int index) {
     // This is required because trying to use an offset
     // of more than 8 texels doesn't work on some versions
     // of OSX.
-    ivec2 uv0 = ivec2(0, index);
+    int y = index / LAYERS_PER_ROW;
-    ivec2 uv1 = ivec2(8, index);
+    int x = VECS_PER_LAYER * (index % LAYERS_PER_ROW);
+
+    ivec2 uv0 = ivec2(x + 0, y);
+    ivec2 uv1 = ivec2(x + 8, y);
 
     layer.transform[0] = texelFetchOffset(sLayers, uv0, 0, ivec2(0, 0));
     layer.transform[1] = texelFetchOffset(sLayers, uv0, 0, ivec2(1, 0));
@@ -85,10 +92,13 @@ struct Tile {
 Tile fetch_tile(int index) {
     Tile tile;
 
-    int offset = index * 2;
+    int y = index / TILES_PER_ROW;
+    int x = VECS_PER_TILE * (index % TILES_PER_ROW);
 
-    tile.actual_rect = tiles[offset + 0];
+    ivec2 uv = ivec2(x + 0, y);
-    tile.target_rect = tiles[offset + 1];
+
+    tile.actual_rect = texelFetchOffset(sRenderTasks, uv, 0, ivec2(0, 0));
+    tile.target_rect = texelFetchOffset(sRenderTasks, uv, 0, ivec2(1, 0));
 
     return tile;
 }