[DisplayList] delete obsolete PathEffect sources (#53441)

As of #53411 there are no more (non-test) references to path effects anywhere in the engine.

Deleting the dead code.

ci/licenses_golden/excluded_files

@@ -38,7 +38,6 @@
 ../../../flutter/display_list/effects/dl_color_source_unittests.cc
 ../../../flutter/display_list/effects/dl_image_filter_unittests.cc
 ../../../flutter/display_list/effects/dl_mask_filter_unittests.cc
-../../../flutter/display_list/effects/dl_path_effect_unittests.cc
 ../../../flutter/display_list/geometry/dl_geometry_types_unittests.cc
 ../../../flutter/display_list/geometry/dl_region_unittests.cc
 ../../../flutter/display_list/geometry/dl_rtree_unittests.cc

ci/licenses_golden/licenses_flutter

@@ -41545,8 +41545,6 @@ ORIGIN: ../../../flutter/display_list/effects/dl_image_filter.cc + ../../../flut
 ORIGIN: ../../../flutter/display_list/effects/dl_image_filter.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/display_list/effects/dl_mask_filter.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/display_list/effects/dl_mask_filter.h + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/display_list/effects/dl_path_effect.cc + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/display_list/effects/dl_path_effect.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/display_list/effects/dl_runtime_effect.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/display_list/effects/dl_runtime_effect.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/display_list/geometry/dl_geometry_types.h + ../../../flutter/LICENSE
@@ -44411,8 +44409,6 @@ FILE: ../../../flutter/display_list/effects/dl_image_filter.cc
 FILE: ../../../flutter/display_list/effects/dl_image_filter.h
 FILE: ../../../flutter/display_list/effects/dl_mask_filter.cc
 FILE: ../../../flutter/display_list/effects/dl_mask_filter.h
-FILE: ../../../flutter/display_list/effects/dl_path_effect.cc
-FILE: ../../../flutter/display_list/effects/dl_path_effect.h
 FILE: ../../../flutter/display_list/effects/dl_runtime_effect.cc
 FILE: ../../../flutter/display_list/effects/dl_runtime_effect.h
 FILE: ../../../flutter/display_list/geometry/dl_geometry_types.h

display_list/BUILD.gn

@@ -56,8 +56,6 @@ source_set("display_list") {
     "effects/dl_image_filter.h",
     "effects/dl_mask_filter.cc",
     "effects/dl_mask_filter.h",
-    "effects/dl_path_effect.cc",
-    "effects/dl_path_effect.h",
     "effects/dl_runtime_effect.cc",
     "effects/dl_runtime_effect.h",
     "geometry/dl_geometry_types.h",
@@ -119,7 +117,6 @@ if (enable_unittests) {
       "effects/dl_color_source_unittests.cc",
       "effects/dl_image_filter_unittests.cc",
       "effects/dl_mask_filter_unittests.cc",
-      "effects/dl_path_effect_unittests.cc",
       "geometry/dl_geometry_types_unittests.cc",
       "geometry/dl_region_unittests.cc",
       "geometry/dl_rtree_unittests.cc",

display_list/benchmarking/dl_complexity_helper.h

@@ -110,7 +110,6 @@ class ComplexityCalculatorHelper
   void setColorSource(const DlColorSource* source) override {}
   void setImageFilter(const DlImageFilter* filter) override {}
   void setColorFilter(const DlColorFilter* filter) override {}
-  void setPathEffect(const DlPathEffect* effect) override {}
   void setMaskFilter(const DlMaskFilter* filter) override {}
 
   void save() override {}

display_list/display_list.h

@@ -69,9 +69,6 @@ namespace flutter {
   V(SetColor)                       \
   V(SetBlendMode)                   \
                                     \
-  V(SetPodPathEffect)               \
-  V(ClearPathEffect)                \
-                                    \
   V(ClearColorFilter)               \
   V(SetPodColorFilter)              \
                                     \

display_list/display_list_unittests.cc

@@ -124,7 +124,6 @@ class DisplayListTestBase : public BaseT {
     EXPECT_EQ(builder_paint.getColorFilter(), defaults.getColorFilter());
     EXPECT_EQ(builder_paint.getImageFilter(), defaults.getImageFilter());
     EXPECT_EQ(builder_paint.getMaskFilter(), defaults.getMaskFilter());
-    EXPECT_EQ(builder_paint.getPathEffect(), defaults.getPathEffect());
     EXPECT_EQ(builder_paint, defaults);
     EXPECT_TRUE(builder_paint.isDefault());
 
@@ -445,10 +444,6 @@ TEST_F(DisplayListTest, BuildRestoresAttributes) {
   receiver.setMaskFilter(&kTestMaskFilter1);
   builder.Build();
   check_defaults(builder, cull_rect);
-
-  receiver.setPathEffect(kTestPathEffect1.get());
-  builder.Build();
-  check_defaults(builder, cull_rect);
 }
 
 TEST_F(DisplayListTest, BuilderBoundsTransformComparedToSkia) {

display_list/dl_builder.cc

@@ -338,22 +338,6 @@ void DisplayListBuilder::onSetColorFilter(const DlColorFilter* filter) {
   }
   UpdateCurrentOpacityCompatibility();
 }
-void DisplayListBuilder::onSetPathEffect(const DlPathEffect* effect) {
-  if (effect == nullptr) {
-    current_.setPathEffect(nullptr);
-    Push<ClearPathEffectOp>(0);
-  } else {
-    current_.setPathEffect(effect->shared());
-    switch (effect->type()) {
-      case DlPathEffectType::kDash: {
-        const DlDashPathEffect* dash_effect = effect->asDash();
-        void* pod = Push<SetPodPathEffectOp>(dash_effect->size());
-        new (pod) DlDashPathEffect(dash_effect);
-        break;
-      }
-    }
-  }
-}
 void DisplayListBuilder::onSetMaskFilter(const DlMaskFilter* filter) {
   if (filter == nullptr) {
     current_.setMaskFilter(nullptr);
@@ -405,9 +389,6 @@ void DisplayListBuilder::SetAttributesFromPaint(
   if (flags.applies_image_filter()) {
     setImageFilter(paint.getImageFilter().get());
   }
-  if (flags.applies_path_effect()) {
-    setPathEffect(paint.getPathEffect().get());
-  }
   if (flags.applies_mask_filter()) {
     setMaskFilter(paint.getMaskFilter().get());
   }
@@ -1726,14 +1707,7 @@ bool DisplayListBuilder::AdjustBoundsForPaint(SkRect& bounds,
 
     // Path effect occurs before stroking...
     DisplayListSpecialGeometryFlags special_flags =
-        flags.WithPathEffect(current_.getPathEffectPtr(), is_stroked);
-    if (current_.getPathEffect()) {
-      auto effect_bounds = current_.getPathEffect()->effect_bounds(bounds);
-      if (!effect_bounds.has_value()) {
-        return false;
-      }
-      bounds = effect_bounds.value();
-    }
+        flags.GeometryFlags(is_stroked);
 
     if (is_stroked) {
       // Determine the max multiplier to the stroke width first.

display_list/dl_builder.h

@@ -12,7 +12,6 @@
 #include "flutter/display_list/dl_op_receiver.h"
 #include "flutter/display_list/dl_paint.h"
 #include "flutter/display_list/dl_sampling_options.h"
-#include "flutter/display_list/effects/dl_path_effect.h"
 #include "flutter/display_list/geometry/dl_geometry_types.h"
 #include "flutter/display_list/image/dl_image.h"
 #include "flutter/display_list/utils/dl_accumulation_rect.h"
@@ -346,12 +345,6 @@ class DisplayListBuilder final : public virtual DlCanvas,
     }
   }
   // |DlOpReceiver|
-  void setPathEffect(const DlPathEffect* effect) override {
-    if (NotEquals(current_.getPathEffect(), effect)) {
-      onSetPathEffect(effect);
-    }
-  }
-  // |DlOpReceiver|
   void setMaskFilter(const DlMaskFilter* filter) override {
     if (NotEquals(current_.getMaskFilter(), filter)) {
       onSetMaskFilter(filter);
@@ -771,7 +764,6 @@ class DisplayListBuilder final : public virtual DlCanvas,
   void onSetColorSource(const DlColorSource* source);
   void onSetImageFilter(const DlImageFilter* filter);
   void onSetColorFilter(const DlColorFilter* filter);
-  void onSetPathEffect(const DlPathEffect* effect);
   void onSetMaskFilter(const DlMaskFilter* filter);
 
   static DisplayListAttributeFlags FlagsForPointMode(PointMode mode);

display_list/dl_op_flags.cc

@@ -3,30 +3,9 @@
 // found in the LICENSE file.
 
 #include "flutter/display_list/dl_op_flags.h"
-#include "flutter/display_list/effects/dl_path_effect.h"
 
 namespace flutter {
 
-const DisplayListSpecialGeometryFlags DisplayListAttributeFlags::WithPathEffect(
-    const DlPathEffect* effect,
-    bool is_stroked) const {
-  if (is_geometric() && effect) {
-    switch (effect->type()) {
-      case DlPathEffectType::kDash: {
-        // Dashing has no effect on filled geometry.
-        if (is_stroked) {
-          // A dash effect has a very simple impact. It cannot introduce any
-          // miter joins that weren't already present in the original path
-          // and it does not grow the bounds of the path, but it can add
-          // end caps to areas that might not have had them before so all
-          // we need to do is to indicate the potential for diagonal
-          // end caps and move on.
-          return special_flags_.with(kMayHaveCaps | kMayHaveDiagonalCaps);
-        }
-      }
-    }
-  }
-  return special_flags_;
-}
+// Just exists to ensure that the header can be cleanly imported.
 
 }  // namespace flutter

display_list/dl_op_flags.h

@@ -10,7 +10,6 @@
 
 namespace flutter {
 
-class DlPathEffect;
 /// The base class for the classes that maintain a list of
 /// attributes that might be important for a number of operations
 /// including which rendering attributes need to be set before
@@ -86,9 +85,8 @@ class DisplayListFlags {
   static constexpr int kUsesBlend           = 1 << 13;
   static constexpr int kUsesShader          = 1 << 14;
   static constexpr int kUsesColorFilter     = 1 << 15;
-  static constexpr int kUsesPathEffect      = 1 << 16;
-  static constexpr int kUsesMaskFilter      = 1 << 17;
-  static constexpr int kUsesImageFilter     = 1 << 18;
+  static constexpr int kUsesMaskFilter      = 1 << 16;
+  static constexpr int kUsesImageFilter     = 1 << 17;
 
   // Some ops have an optional paint argument. If the version
   // stored in the DisplayList ignores the paint, but there
@@ -102,7 +100,7 @@ class DisplayListFlags {
 
   static constexpr int kAnyAttributeMask =  //
       kUsesAntiAlias | kUsesAlpha | kUsesColor | kUsesBlend | kUsesShader |
-      kUsesColorFilter | kUsesPathEffect | kUsesMaskFilter | kUsesImageFilter;
+      kUsesColorFilter | kUsesMaskFilter | kUsesImageFilter;
 };
 
 class DisplayListFlagsBase : protected DisplayListFlags {
@@ -164,9 +162,9 @@ class DisplayListSpecialGeometryFlags : DisplayListFlagsBase {
 
 class DisplayListAttributeFlags : DisplayListFlagsBase {
  public:
-  const DisplayListSpecialGeometryFlags WithPathEffect(
-      const DlPathEffect* effect,
-      bool is_stroked) const;
+  const DisplayListSpecialGeometryFlags GeometryFlags(bool is_stroked) const {
+    return special_flags_;
+  }
 
   constexpr bool ignores_paint() const { return has_any(kIgnoresPaint); }
 
@@ -198,9 +196,6 @@ class DisplayListAttributeFlags : DisplayListFlagsBase {
   }
   /// The primitive honors the DlBlendMode
   constexpr bool applies_blend() const { return has_any(kUsesBlend); }
-  constexpr bool applies_path_effect() const {
-    return has_any(kUsesPathEffect);
-  }
   /// The primitive honors the DlMaskFilter whether set using the
   /// filter object or using the convenience method |setMaskBlurFilter|
   constexpr bool applies_mask_filter() const {
@@ -264,14 +259,12 @@ class DisplayListOpFlags : DisplayListFlags {
   // Flags common to all primitives that stroke or fill
   static constexpr int kBaseStrokeOrFillFlags = (kIsDrawnGeometry |  //
                                                  kUsesAntiAlias |    //
-                                                 kUsesMaskFilter |   //
-                                                 kUsesPathEffect);
+                                                 kUsesMaskFilter);
 
   // Flags common to primitives that stroke geometry
   static constexpr int kBaseStrokeFlags = (kIsStrokedGeometry |  //
                                            kUsesAntiAlias |      //
-                                           kUsesMaskFilter |     //
-                                           kUsesPathEffect);
+                                           kUsesMaskFilter);
 
   // Flags common to primitives that render an image with paint attributes
   static constexpr int kBaseImageFlags = (kIsNonGeometric |   //

display_list/dl_op_receiver.h

@@ -15,7 +15,6 @@
 #include "flutter/display_list/effects/dl_color_source.h"
 #include "flutter/display_list/effects/dl_image_filter.h"
 #include "flutter/display_list/effects/dl_mask_filter.h"
-#include "flutter/display_list/effects/dl_path_effect.h"
 #include "flutter/display_list/image/dl_image.h"
 
 #include "flutter/impeller/geometry/path.h"
@@ -157,7 +156,6 @@ class DlOpReceiver {
   // filter so that the color inversion happens after the ColorFilter.
   virtual void setInvertColors(bool invert) = 0;
   virtual void setBlendMode(DlBlendMode mode) = 0;
-  virtual void setPathEffect(const DlPathEffect* effect) = 0;
   virtual void setMaskFilter(const DlMaskFilter* filter) = 0;
   virtual void setImageFilter(const DlImageFilter* filter) = 0;
 

display_list/dl_op_records.h

@@ -231,7 +231,6 @@ DEFINE_SET_CLEAR_DLATTR_OP(ColorFilter, ColorFilter, filter)
 DEFINE_SET_CLEAR_DLATTR_OP(ImageFilter, ImageFilter, filter)
 DEFINE_SET_CLEAR_DLATTR_OP(MaskFilter, MaskFilter, filter)
 DEFINE_SET_CLEAR_DLATTR_OP(ColorSource, Shader, source)
-DEFINE_SET_CLEAR_DLATTR_OP(PathEffect, PathEffect, effect)
 #undef DEFINE_SET_CLEAR_DLATTR_OP
 
 // 4 byte header + 80 bytes for the embedded DlImageColorSource

display_list/dl_paint.cc

@@ -30,8 +30,7 @@ bool DlPaint::operator==(DlPaint const& other) const {
          Equals(color_source_, other.color_source_) &&    //
          Equals(color_filter_, other.color_filter_) &&    //
          Equals(image_filter_, other.image_filter_) &&    //
-         Equals(mask_filter_, other.mask_filter_) &&      //
-         Equals(path_effect_, other.path_effect_);
+         Equals(mask_filter_, other.mask_filter_);
 }
 
 const DlPaint DlPaint::kDefault;

display_list/dl_paint.h

@@ -13,7 +13,6 @@
 #include "flutter/display_list/effects/dl_color_source.h"
 #include "flutter/display_list/effects/dl_image_filter.h"
 #include "flutter/display_list/effects/dl_mask_filter.h"
-#include "flutter/display_list/effects/dl_path_effect.h"
 
 namespace flutter {
 
@@ -177,19 +176,6 @@ class DlPaint {
     return *this;
   }
 
-  std::shared_ptr<const DlPathEffect> getPathEffect() const {
-    return path_effect_;
-  }
-  const DlPathEffect* getPathEffectPtr() const { return path_effect_.get(); }
-  DlPaint& setPathEffect(const std::shared_ptr<DlPathEffect>& pathEffect) {
-    path_effect_ = pathEffect;
-    return *this;
-  }
-  DlPaint& setPathEffect(const DlPathEffect* effect) {
-    path_effect_ = effect ? effect->shared() : nullptr;
-    return *this;
-  }
-
   bool isDefault() const { return *this == kDefault; }
 
   bool operator==(DlPaint const& other) const;
@@ -228,7 +214,6 @@ class DlPaint {
   std::shared_ptr<const DlColorFilter> color_filter_;
   std::shared_ptr<const DlImageFilter> image_filter_;
   std::shared_ptr<const DlMaskFilter> mask_filter_;
-  std::shared_ptr<const DlPathEffect> path_effect_;
 };
 
 }  // namespace flutter

display_list/dl_paint_unittests.cc

@@ -26,7 +26,6 @@ TEST(DisplayListPaint, ConstructorDefaults) {
   EXPECT_EQ(paint.getColorFilter(), nullptr);
   EXPECT_EQ(paint.getImageFilter(), nullptr);
   EXPECT_EQ(paint.getMaskFilter(), nullptr);
-  EXPECT_EQ(paint.getPathEffect(), nullptr);
   EXPECT_TRUE(paint.isDefault());
   EXPECT_EQ(paint, DlPaint::kDefault);
 
@@ -67,44 +66,33 @@ TEST(DisplayListPaint, ConstructorDefaults) {
 
   DlBlurMaskFilter mask_filter(DlBlurStyle::kInner, 3.14);
   EXPECT_NE(paint, DlPaint().setMaskFilter(mask_filter.shared()));
-
-  SkScalar intervals[] = {1.0f, 2.0f};
-  auto path_effect = DlDashPathEffect::Make(intervals, 2, 0.0f);
-  EXPECT_NE(paint, DlPaint().setPathEffect(path_effect.get()));
 }
 
 TEST(DisplayListPaint, NullPointerSetGet) {
   DlColorSource* null_color_source = nullptr;
   DlColorFilter* null_color_filter = nullptr;
   DlImageFilter* null_image_filter = nullptr;
   DlMaskFilter* null_mask_filter = nullptr;
-  DlPathEffect* null_path_effect = nullptr;
   DlPaint paint;
   EXPECT_EQ(paint.setColorSource(null_color_source).getColorSource(), nullptr);
   EXPECT_EQ(paint.setColorFilter(null_color_filter).getColorFilter(), nullptr);
   EXPECT_EQ(paint.setImageFilter(null_image_filter).getImageFilter(), nullptr);
   EXPECT_EQ(paint.setMaskFilter(null_mask_filter).getMaskFilter(), nullptr);
-  EXPECT_EQ(paint.setPathEffect(null_path_effect).getPathEffect(), nullptr);
 }
 
 TEST(DisplayListPaint, NullSharedPointerSetGet) {
   std::shared_ptr<DlColorSource> null_color_source;
   std::shared_ptr<DlColorFilter> null_color_filter;
   std::shared_ptr<DlImageFilter> null_image_filter;
   std::shared_ptr<DlMaskFilter> null_mask_filter;
-  std::shared_ptr<DlPathEffect> null_path_effect;
   DlPaint paint;
   EXPECT_EQ(paint.setColorSource(null_color_source).getColorSource(), nullptr);
   EXPECT_EQ(paint.setColorFilter(null_color_filter).getColorFilter(), nullptr);
   EXPECT_EQ(paint.setImageFilter(null_image_filter).getImageFilter(), nullptr);
   EXPECT_EQ(paint.setMaskFilter(null_mask_filter).getMaskFilter(), nullptr);
-  EXPECT_EQ(paint.setPathEffect(null_path_effect).getPathEffect(), nullptr);
 }
 
 TEST(DisplayListPaint, ChainingConstructor) {
-  SkScalar intervals[] = {1.0f, 2.0f};
-  auto path_effect = DlDashPathEffect::Make(intervals, 2, 0.0f);
-
   DlPaint paint =
       DlPaint()                                                              //
           .setAntiAlias(true)                                                //
@@ -123,8 +111,7 @@ TEST(DisplayListPaint, ChainingConstructor) {
                   .shared())
           .setImageFilter(
               DlBlurImageFilter(1.3, 4.7, DlTileMode::kClamp).shared())
-          .setMaskFilter(DlBlurMaskFilter(DlBlurStyle::kInner, 3.14).shared())
-          .setPathEffect(path_effect);
+          .setMaskFilter(DlBlurMaskFilter(DlBlurStyle::kInner, 3.14).shared());
   EXPECT_TRUE(paint.isAntiAlias());
   EXPECT_TRUE(paint.isInvertColors());
   EXPECT_EQ(paint.getColor(), DlColor::kGreen().withAlpha(0x7F));
@@ -142,7 +129,6 @@ TEST(DisplayListPaint, ChainingConstructor) {
             DlBlurImageFilter(1.3, 4.7, DlTileMode::kClamp));
   EXPECT_EQ(*paint.getMaskFilter(),
             DlBlurMaskFilter(DlBlurStyle::kInner, 3.14));
-  EXPECT_EQ(*paint.getPathEffect(), *path_effect);
 
   EXPECT_NE(paint, DlPaint());
 }