cc: Consolidate the analysis_canvas operations

cc/tile_manager.cc

Index: cc/tile_manager.cc
diff --git a/cc/tile_manager.cc b/cc/tile_manager.cc
index 054b5e55fbd19b16633e9ccac9cdc3a5fae16ea4..3299b4d1b922a1f6d28638ba28381f8df44bc893 100644
--- a/cc/tile_manager.cc
+++ b/cc/tile_manager.cc
@@ -177,7 +177,9 @@ TileManager::TileManager(
     TileManagerClient* client,
     ResourceProvider* resource_provider,
     size_t num_raster_threads,
-    bool use_cheapness_estimator)
+    bool use_cheapness_estimator,
+    bool use_color_estimator,
+    bool prediction_benchmarking)
     : client_(client),
       resource_pool_(ResourcePool::Create(resource_provider)),
       raster_worker_pool_(RasterWorkerPool::Create(this, num_raster_threads)),
@@ -188,8 +190,10 @@ TileManager::TileManager(
       ever_exceeded_memory_budget_(false),
       record_rendering_stats_(false),
       use_cheapness_estimator_(use_cheapness_estimator),
+      use_color_estimator_(use_color_estimator),
       allow_cheap_tasks_(true),
-      did_schedule_cheap_tasks_(false) {
+      did_schedule_cheap_tasks_(false),
+      prediction_benchmarking_(prediction_benchmarking) {
   for (int i = 0; i < NUM_STATES; ++i) {
     for (int j = 0; j < NUM_TREES; ++j) {
       for (int k = 0; k < NUM_BINS; ++k)
@@ -371,11 +375,30 @@ void TileManager::ManageTiles() {
     for (int i = 0; i < NUM_BIN_PRIORITIES; ++i)
       mts.bin[i] = bin_map[mts.bin[i]];
 
-    if (tile->priority(ACTIVE_TREE).is_live ||
-        tile->priority(PENDING_TREE).is_live ||
-        tile->managed_state().resource ||
+    if (tile->managed_state().resource ||
         tile->managed_state().resource_is_being_initialized) {
       live_or_allocated_tiles_.push_back(tile);
+    } else if (tile->priority(ACTIVE_TREE).is_live ||
+             tile->priority(PENDING_TREE).is_live) {
+      bool is_cheap = use_cheapness_estimator_ &&
+          tile->picture_pile()->IsCheapInRect(tile->content_rect(),
+                                              tile->contents_scale());
+      tile->set_cheap(is_cheap);
+      if (use_color_estimator_) {
+        SkColor color;
+        bool is_solid_color = tile->picture_pile()->GetColorIfSolidInRect(
+          tile->content_rect(),
+          tile->contents_scale(),
+          &color);
+        if (is_solid_color)
+          tile->set_solid_color(color);
+
+        bool is_transparent = tile->picture_pile()->IsTransparentInRect(
+          tile->content_rect(),
+          tile->contents_scale());
+        tile->set_transparent(is_transparent);
+      }
+      live_or_allocated_tiles_.push_back(tile);
     }
   }
   TRACE_COUNTER_ID1("cc", "LiveOrAllocatedTileCount", this,
@@ -579,6 +602,8 @@ void TileManager::AssignGpuMemoryToTiles() {
   for (TileVector::iterator it = live_or_allocated_tiles_.begin();
        it != live_or_allocated_tiles_.end(); ++it) {
     Tile* tile = *it;
+    if (tile->is_solid_color() || tile->is_transparent())
+      continue;
     if (!tile->managed_state().can_be_freed)
       unreleasable_bytes += tile->bytes_consumed_if_allocated();
     if (tile->managed_state().raster_state == WAITING_FOR_RASTER_STATE)
@@ -590,6 +615,9 @@ void TileManager::AssignGpuMemoryToTiles() {
   size_t bytes_left = bytes_allocatable;
   for (TileVector::iterator it = live_or_allocated_tiles_.begin(); it != live_or_allocated_tiles_.end(); ++it) {
     Tile* tile = *it;
+    if (tile->is_solid_color() || tile->is_transparent())
+      continue;
+
     size_t tile_bytes = tile->bytes_consumed_if_allocated();
     ManagedTileState& managed_tile_state = tile->managed_state();
     if (!managed_tile_state.can_be_freed)
@@ -794,12 +822,9 @@ void TileManager::DispatchOneRasterTask(scoped_refptr<Tile> tile) {
   uint8* buffer =
       resource_pool_->resource_provider()->mapPixelBuffer(resource_id);
 
-  bool is_cheap = use_cheapness_estimator_ && allow_cheap_tasks_ &&
-      tile->picture_pile()->IsCheapInRect(tile->content_rect_,
-                                          tile->contents_scale());
   raster_worker_pool_->PostRasterTaskAndReply(
       tile->picture_pile(),
-      is_cheap,
+      allow_cheap_tasks_ && tile->is_cheap(),
       base::Bind(&TileManager::RunRasterTask,
                  buffer,
                  tile->content_rect(),
@@ -810,14 +835,14 @@ void TileManager::DispatchOneRasterTask(scoped_refptr<Tile> tile) {
                  tile,
                  base::Passed(&resource),
                  manage_tiles_call_count_));
-  did_schedule_cheap_tasks_ |= is_cheap;
+  did_schedule_cheap_tasks_ |= (allow_cheap_tasks_ && tile->is_cheap());
 }
 
 TileManager::RasterTaskMetadata TileManager::GetRasterTaskMetadata(
     const Tile& tile) const {
   RasterTaskMetadata metadata;
   const ManagedTileState& mts = tile.managed_state();
-  metadata.use_cheapness_estimator = use_cheapness_estimator_;
+  metadata.prediction_benchmarking = prediction_benchmarking_;
   metadata.is_tile_in_pending_tree_now_bin =
       mts.tree_bin[PENDING_TREE] == NOW_BIN;
   metadata.tile_resolution = mts.resolution;
@@ -942,7 +967,6 @@ void TileManager::RunRasterTask(uint8* buffer,
   int64 total_pixels_rasterized = 0;
   picture_pile->Raster(&canvas, rect, contents_scale,
                        &total_pixels_rasterized);
-
   if (stats) {
     stats->totalPixelsRasterized += total_pixels_rasterized;
 
@@ -958,11 +982,24 @@ void TileManager::RunRasterTask(uint8* buffer,
                                 10,
                                 10);
 
-    if (metadata.use_cheapness_estimator) {
+    if (metadata.prediction_benchmarking) {
       bool is_predicted_cheap =
           picture_pile->IsCheapInRect(rect, contents_scale);
       bool is_actually_cheap = duration.InMillisecondsF() <= 1.0f;
       RecordCheapnessPredictorResults(is_predicted_cheap, is_actually_cheap);
+
+      SkColor solid_color;
+      bool is_predicted_solid =
+          picture_pile->GetColorIfSolidInRect(rect, contents_scale, &solid_color);
+      bool is_predicted_transparent =
+          picture_pile->IsTransparentInRect(rect, contents_scale);
+
+      RecordSolidColorPredictorResults(
+          reinterpret_cast<SkColor*>(bitmap.getPixels()),
+          bitmap.getSize() / bitmap.bytesPerPixel(),
+          is_predicted_solid,
+          solid_color,
+          is_predicted_transparent);
     }
   }
 }
@@ -980,6 +1017,55 @@ void TileManager::RecordCheapnessPredictorResults(bool is_predicted_cheap,
 }
 
 // static
+void TileManager::RecordSolidColorPredictorResults(
+    const SkColor* actual_colors,
+    size_t color_count,
+    bool is_predicted_solid,
+    SkColor predicted_color,
+    bool is_predicted_transparent) {
+  DCHECK_GT(color_count, 0);
+
+  bool is_actually_solid = true;
+  bool is_transparent = true;
+
+  SkColor actual_color = *actual_colors;
+  for (int i = 0; i < color_count; ++i) {
+    SkColor current_color = actual_colors[i];
+    if (current_color != actual_color ||
+        SkColorGetA(current_color) != 255)
+      is_actually_solid = false;
+
+    if (SkColorGetA(current_color) != 0)
+      is_transparent = false;
+  }
+
+  if (is_predicted_solid && !is_actually_solid)
+    UMA_HISTOGRAM_BOOLEAN("Renderer4.ColorPredictor.WrongActualNotSolid", true);
+  else if (is_predicted_solid &&
+           is_actually_solid &&
+           predicted_color != actual_color)
+    UMA_HISTOGRAM_BOOLEAN("Renderer4.ColorPredictor.WrongColor", true);
+  else if (!is_predicted_solid && is_actually_solid)
+    UMA_HISTOGRAM_BOOLEAN("Renderer4.ColorPredictor.WrongActualSolid", true);
+
+  bool correct_guess = (is_predicted_solid && is_actually_solid &&
+                        predicted_color == actual_color) ||
+                       (!is_predicted_solid && !is_actually_solid);
+  UMA_HISTOGRAM_BOOLEAN("Renderer4.ColorPredictor.Accuracy", correct_guess);
+
+  if (correct_guess)
+    UMA_HISTOGRAM_BOOLEAN("Renderer4.ColorPredictor.IsCorrectSolid", 
+                          is_predicted_solid);
+
+  if (is_predicted_transparent)
+    UMA_HISTOGRAM_BOOLEAN(
+        "Renderer4.ColorPredictor.PredictedTransparentIsActually",
+        is_transparent);
+  UMA_HISTOGRAM_BOOLEAN("Renderer4.ColorPredictor.IsActuallyTransparent",
+                        is_transparent);
+}
+
+// static
 void TileManager::RunImageDecodeTask(skia::LazyPixelRef* pixel_ref,
                                      RenderingStats* stats) {
   TRACE_EVENT0("cc", "TileManager::RunImageDecodeTask");