cc: Unify the occlusion access by adding an ability to scale transform.

cc/layers/picture_layer_impl.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/layers/picture_layer_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <set>
 
@@ skipping 147 matching lines @@
 
   SharedQuadState* shared_quad_state =
       render_pass->CreateAndAppendSharedQuadState();
 
   if (pile_->is_solid_color()) {
     PopulateSharedQuadState(shared_quad_state);
 
     AppendDebugBorderQuad(
         render_pass, content_bounds(), shared_quad_state, append_quads_data);
 
-    SolidColorLayerImpl::AppendSolidQuads(
-        render_pass,
-        occlusion_tracker,
-        shared_quad_state,
-        content_bounds(),
-        draw_properties().target_space_transform,
-        pile_->solid_color(),
-        append_quads_data);
+    SolidColorLayerImpl::AppendSolidQuads(render_pass,
+                                          occlusion_tracker,
+                                          shared_quad_state,
+                                          content_bounds(),
+                                          draw_transform(),
+                                          pile_->solid_color(),
+                                          append_quads_data);
     return;
   }
 
+  Occlusion occlusion =
+      occlusion_tracker.GetCurrentOcclusionForLayer(draw_transform());
+
   float max_contents_scale = MaximumTilingContentsScale();
   gfx::Transform scaled_draw_transform = draw_transform();
   scaled_draw_transform.Scale(SK_MScalar1 / max_contents_scale,
                               SK_MScalar1 / max_contents_scale);
   gfx::Size scaled_content_bounds =
       gfx::ToCeiledSize(gfx::ScaleSize(content_bounds(), max_contents_scale));
-
   gfx::Rect scaled_visible_content_rect =
       gfx::ScaleToEnclosingRect(visible_content_rect(), max_contents_scale);
   scaled_visible_content_rect.Intersect(gfx::Rect(scaled_content_bounds));
-
-  Occlusion occlusion =
-      occlusion_tracker.GetCurrentOcclusionForLayer(scaled_draw_transform);
+  Occlusion scaled_occlusion = occlusion.GetOcclusionWithScaledDrawTransform(
+      SK_MScalar1 / max_contents_scale, SK_MScalar1 / max_contents_scale);
 
   shared_quad_state->SetAll(scaled_draw_transform,
                             scaled_content_bounds,
                             scaled_visible_content_rect,
                             draw_properties().clip_rect,
                             draw_properties().is_clipped,
                             draw_properties().opacity,
                             blend_mode(),
                             sorting_context_id_);
 
   if (current_draw_mode_ == DRAW_MODE_RESOURCELESS_SOFTWARE) {
     AppendDebugBorderQuad(
         render_pass,
         scaled_content_bounds,
         shared_quad_state,
         append_quads_data,
         DebugColors::DirectPictureBorderColor(),
         DebugColors::DirectPictureBorderWidth(layer_tree_impl()));
 
     gfx::Rect geometry_rect = scaled_visible_content_rect;
     gfx::Rect opaque_rect = contents_opaque() ? geometry_rect : gfx::Rect();
     gfx::Rect visible_geometry_rect =
-        occlusion.GetUnoccludedContentRect(geometry_rect);
+        scaled_occlusion.GetUnoccludedContentRect(geometry_rect);
     if (visible_geometry_rect.IsEmpty())
       return;
 
     gfx::Size texture_size = scaled_visible_content_rect.size();
     gfx::RectF texture_rect = gfx::RectF(texture_size);
     gfx::Rect quad_content_rect = scaled_visible_content_rect;
 
     PictureDrawQuad* quad =
         render_pass->CreateAndAppendDrawQuad<PictureDrawQuad>();
     quad->SetNew(shared_quad_state,
@@ skipping 74 matching lines @@
   size_t on_demand_missing_tile_count = 0u;
   for (PictureLayerTilingSet::CoverageIterator iter(tilings_.get(),
                                                     max_contents_scale,
                                                     scaled_visible_content_rect,
                                                     ideal_contents_scale_);
        iter;
        ++iter) {
     gfx::Rect geometry_rect = iter.geometry_rect();
     gfx::Rect opaque_rect = contents_opaque() ? geometry_rect : gfx::Rect();
     gfx::Rect visible_geometry_rect =
-        occlusion.GetUnoccludedContentRect(geometry_rect);
+        scaled_occlusion.GetUnoccludedContentRect(geometry_rect);
     if (visible_geometry_rect.IsEmpty())
       continue;
 
     append_quads_data->visible_content_area +=
         visible_geometry_rect.width() * visible_geometry_rect.height();
 
     bool has_draw_quad = false;
     if (*iter && iter->IsReadyToDraw()) {
       const ManagedTileState::DrawInfo& draw_info = iter->draw_info();
       switch (draw_info.mode()) {
@@ skipping 1474 matching lines @@
       PictureLayerTilingSet::TilingRange tiling_range = CurrentTilingRange();
       size_t current_tiling_range_offset = current_tiling_ - tiling_range.start;
       return tiling_range.end - 1 - current_tiling_range_offset;
     }
   }
   NOTREACHED();
   return 0;
 }
 
 }  // namespace cc