Allow Core Animation compositor to use some scaled filter effects.

cc/output/ca_layer_overlay.cc

 // Copyright 2015 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/output/ca_layer_overlay.h"
 
 #include "base/metrics/histogram.h"
 #include "cc/quads/render_pass_draw_quad.h"
 #include "cc/quads/solid_color_draw_quad.h"
 #include "cc/quads/stream_video_draw_quad.h"
@@ skipping 85 matching lines @@
     filter_effect.drop_shadow_offset = operation.drop_shadow_offset();
     filter_effect.drop_shadow_color = operation.drop_shadow_color();
   }
   filter_effects->push_back(filter_effect);
   return true;
 }
 
 CALayerResult FromRenderPassQuad(ResourceProvider* resource_provider,
                                  const RenderPassDrawQuad* quad,
                                  CALayerOverlay* ca_layer_overlay) {
-  if (quad->filters_scale != gfx::Vector2dF(1, 1))
-    return CA_LAYER_FAILED_RENDER_PASS_FILTER_SCALE;
   if (quad->background_filters.size() != 0)
     return CA_LAYER_FAILED_RENDER_PASS_BACKGROUND_FILTERS;
   if (quad->mask_resource_id() != 0)
     return CA_LAYER_FAILED_RENDER_PASS_MASK;
 
   for (const FilterOperation& operation : quad->filters.operations()) {
     bool success = ConvertAndAppendFilterOperation(
         operation, &ca_layer_overlay->filter_effects);
     if (!success)
       return CA_LAYER_FAILED_RENDER_PASS_FILTER_OPERATION;
   }
 
+  if (quad->filters_scale != gfx::Vector2dF(1, 1)) {
+    for (const ui::CARendererLayerParams::FilterEffect& effect :
+         ca_layer_overlay->filter_effects) {
+      using FilterEffectType = ui::CARendererLayerParams::FilterEffectType;
+      if (effect.type == FilterEffectType::BLUR ||
+          effect.type == FilterEffectType::DROP_SHADOW) {
+        return CA_LAYER_FAILED_RENDER_PASS_FILTER_SCALE;
+      }
+    }
+  }
+
   ca_layer_overlay->render_pass_id = quad->render_pass_id;
   ca_layer_overlay->contents_rect = gfx::RectF(0, 0, 1, 1);
 
   return CA_LAYER_SUCCESS;
 }
 
 CALayerResult FromStreamVideoQuad(ResourceProvider* resource_provider,
                                   const StreamVideoDrawQuad* quad,
                                   CALayerOverlay* ca_layer_overlay) {
   unsigned resource_id = quad->resource_id();
@@ skipping 200 matching lines @@
                             CA_LAYER_FAILED_COUNT);
 
   if (result != CA_LAYER_SUCCESS) {
     ca_layer_overlays->clear();
     return false;
   }
   return true;
 }
 
 }  // namespace cc