Fix zoom-handling for <feTile> and <feImage>

Need to apply zoom to the destination rectangle in both cases, and
the source rectangle for the <feTile> case (since it reads from its
input).

Fixed: 1051526
Change-Id: I9b2376059bd2ceb95b94ff23132020bc43886e0e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2052123Reviewed-by: Stephen Chenney <schenney@chromium.org>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#741018}

third_party/blink/renderer/core/svg/graphics/filters/svg_fe_image.cc

@@ -143,7 +143,8 @@ WTF::TextStream& FEImage::ExternalRepresentation(WTF::TextStream& ts,
 
 sk_sp<PaintFilter> FEImage::CreateImageFilterForLayoutObject(
     const LayoutObject& layout_object) {
-  FloatRect dst_rect = FilterPrimitiveSubregion();
+  FloatRect dst_rect =
+      GetFilter()->MapLocalRectToAbsoluteRect(FilterPrimitiveSubregion());
 
   AffineTransform transform;
   auto* context_node = To<SVGElement>(layout_object.GetNode());
@@ -190,7 +191,8 @@ sk_sp<PaintFilter> FEImage::CreateImageFilter() {
   }
 
   FloatRect src_rect = FloatRect(FloatPoint(), FloatSize(image_->Size()));
-  FloatRect dst_rect = FilterPrimitiveSubregion();
+  FloatRect dst_rect =
+      GetFilter()->MapLocalRectToAbsoluteRect(FilterPrimitiveSubregion());
 
   preserve_aspect_ratio_->TransformRect(dst_rect, src_rect);
 

third_party/blink/renderer/platform/graphics/filters/fe_tile.cc

@@ -34,18 +34,21 @@ FloatRect FETile::MapInputs(const FloatRect& rect) const {
   return AbsoluteBounds();
 }
 
+FloatRect FETile::GetSourceRect() const {
+  const FilterEffect* input = InputEffect(0);
+  if (input->GetFilterEffectType() == kFilterEffectTypeSourceInput)
+    return GetFilter()->FilterRegion();
+  return input->FilterPrimitiveSubregion();
+}
+
 sk_sp<PaintFilter> FETile::CreateImageFilter() {
   sk_sp<PaintFilter> input(paint_filter_builder::Build(
       InputEffect(0), OperatingInterpolationSpace()));
   if (!input)
     return nullptr;
-
-  FloatRect src_rect;
-  if (InputEffect(0)->GetFilterEffectType() == kFilterEffectTypeSourceInput)
-    src_rect = GetFilter()->FilterRegion();
-  else
-    src_rect = InputEffect(0)->FilterPrimitiveSubregion();
-  FloatRect dst_rect = FilterPrimitiveSubregion();
+  FloatRect src_rect = GetFilter()->MapLocalRectToAbsoluteRect(GetSourceRect());
+  FloatRect dst_rect =
+      GetFilter()->MapLocalRectToAbsoluteRect(FilterPrimitiveSubregion());
   return sk_make_sp<TilePaintFilter>(src_rect, dst_rect, std::move(input));
 }
 

third_party/blink/renderer/platform/graphics/filters/fe_tile.h

@@ -40,6 +40,7 @@ class PLATFORM_EXPORT FETile final : public FilterEffect {
   }
 
   FloatRect MapInputs(const FloatRect&) const final;
+  FloatRect GetSourceRect() const;
 
   sk_sp<PaintFilter> CreateImageFilter() override;
 };