Revert "Reland "add non-rendering operation culling to DisplayListBuilder" (#41463) (#42330)"

This reverts commit 3a453f2.

Author: flar

display_list/benchmarking/dl_complexity_unittests.cc

@@ -423,7 +423,7 @@ TEST(DisplayListComplexity, DrawAtlas) {
   std::vector<SkRSXform> xforms;
   for (int i = 0; i < 10; i++) {
     rects.push_back(SkRect::MakeXYWH(0, 0, 10, 10));
-    xforms.push_back(SkRSXform::Make(1, 0, 0, 0));
+    xforms.push_back(SkRSXform::Make(0, 0, 0, 0));
   }
 
   DisplayListBuilder builder;

display_list/display_list.cc

@@ -22,8 +22,7 @@ DisplayList::DisplayList()
       unique_id_(0),
       bounds_({0, 0, 0, 0}),
       can_apply_group_opacity_(true),
-      is_ui_thread_safe_(true),
-      modifies_transparent_black_(false) {}
+      is_ui_thread_safe_(true) {}
 
 DisplayList::DisplayList(DisplayListStorage&& storage,
                          size_t byte_count,
@@ -33,7 +32,6 @@ DisplayList::DisplayList(DisplayListStorage&& storage,
                          const SkRect& bounds,
                          bool can_apply_group_opacity,
                          bool is_ui_thread_safe,
-                         bool modifies_transparent_black,
                          sk_sp<const DlRTree> rtree)
     : storage_(std::move(storage)),
       byte_count_(byte_count),
@@ -44,7 +42,6 @@ DisplayList::DisplayList(DisplayListStorage&& storage,
       bounds_(bounds),
       can_apply_group_opacity_(can_apply_group_opacity),
       is_ui_thread_safe_(is_ui_thread_safe),
-      modifies_transparent_black_(modifies_transparent_black),
       rtree_(std::move(rtree)) {}
 
 DisplayList::~DisplayList() {

display_list/display_list.h

@@ -265,19 +265,6 @@ class DisplayList : public SkRefCnt {
   bool can_apply_group_opacity() const { return can_apply_group_opacity_; }
   bool isUIThreadSafe() const { return is_ui_thread_safe_; }
 
-  /// @brief     Indicates if there are any rendering operations in this
-  ///            DisplayList that will modify a surface of transparent black
-  ///            pixels.
-  ///
-  /// This condition can be used to determine whether to create a cleared
-  /// surface, render a DisplayList into it, and then composite the
-  /// result into a scene. It is not uncommon for code in the engine to
-  /// come across such degenerate DisplayList objects when slicing up a
-  /// frame between platform views.
-  bool modifies_transparent_black() const {
-    return modifies_transparent_black_;
-  }
-
  private:
   DisplayList(DisplayListStorage&& ptr,
               size_t byte_count,
@@ -287,7 +274,6 @@ class DisplayList : public SkRefCnt {
               const SkRect& bounds,
               bool can_apply_group_opacity,
               bool is_ui_thread_safe,
-              bool modifies_transparent_black,
               sk_sp<const DlRTree> rtree);
 
   static uint32_t next_unique_id();
@@ -306,8 +292,6 @@ class DisplayList : public SkRefCnt {
 
   const bool can_apply_group_opacity_;
   const bool is_ui_thread_safe_;
-  const bool modifies_transparent_black_;
-
   const sk_sp<const DlRTree> rtree_;
 
   void Dispatch(DlOpReceiver& ctx,

display_list/display_list_unittests.cc

@@ -22,7 +22,6 @@
 #include "flutter/testing/testing.h"
 
 #include "third_party/skia/include/core/SkPictureRecorder.h"
-#include "third_party/skia/include/core/SkRSXform.h"
 #include "third_party/skia/include/core/SkSurface.h"
 
 namespace flutter {
@@ -2875,164 +2874,5 @@ TEST_F(DisplayListTest, DrawSaveDrawCannotInheritOpacity) {
   ASSERT_FALSE(display_list->can_apply_group_opacity());
 }
 
-TEST_F(DisplayListTest, NopOperationsOmittedFromRecords) {
-  auto run_tests = [](const std::string& name,
-                      void init(DisplayListBuilder & builder, DlPaint & paint),
-                      uint32_t expected_op_count = 0u) {
-    auto run_one_test =
-        [init](const std::string& name,
-               void build(DisplayListBuilder & builder, DlPaint & paint),
-               uint32_t expected_op_count = 0u) {
-          DisplayListBuilder builder;
-          DlPaint paint;
-          init(builder, paint);
-          build(builder, paint);
-          auto list = builder.Build();
-          if (list->op_count() != expected_op_count) {
-            FML_LOG(ERROR) << *list;
-          }
-          ASSERT_EQ(list->op_count(), expected_op_count) << name;
-          ASSERT_TRUE(list->bounds().isEmpty()) << name;
-        };
-    run_one_test(
-        name + " DrawColor",
-        [](DisplayListBuilder& builder, DlPaint& paint) {
-          builder.DrawColor(paint.getColor(), paint.getBlendMode());
-        },
-        expected_op_count);
-    run_one_test(
-        name + " DrawPaint",
-        [](DisplayListBuilder& builder, DlPaint& paint) {
-          builder.DrawPaint(paint);
-        },
-        expected_op_count);
-    run_one_test(
-        name + " DrawRect",
-        [](DisplayListBuilder& builder, DlPaint& paint) {
-          builder.DrawRect({10, 10, 20, 20}, paint);
-        },
-        expected_op_count);
-    run_one_test(
-        name + " Other Draw Ops",
-        [](DisplayListBuilder& builder, DlPaint& paint) {
-          builder.DrawLine({10, 10}, {20, 20}, paint);
-          builder.DrawOval({10, 10, 20, 20}, paint);
-          builder.DrawCircle({50, 50}, 20, paint);
-          builder.DrawRRect(SkRRect::MakeRectXY({10, 10, 20, 20}, 5, 5), paint);
-          builder.DrawDRRect(SkRRect::MakeRectXY({5, 5, 100, 100}, 5, 5),
-                             SkRRect::MakeRectXY({10, 10, 20, 20}, 5, 5),
-                             paint);
-          builder.DrawPath(kTestPath1, paint);
-          builder.DrawArc({10, 10, 20, 20}, 45, 90, true, paint);
-          SkPoint pts[] = {{10, 10}, {20, 20}};
-          builder.DrawPoints(PointMode::kLines, 2, pts, paint);
-          builder.DrawVertices(TestVertices1, DlBlendMode::kSrcOver, paint);
-          builder.DrawImage(TestImage1, {10, 10}, DlImageSampling::kLinear,
-                            &paint);
-          builder.DrawImageRect(TestImage1, SkRect{0.0f, 0.0f, 10.0f, 10.0f},
-                                SkRect{10.0f, 10.0f, 25.0f, 25.0f},
-                                DlImageSampling::kLinear, &paint);
-          builder.DrawImageNine(TestImage1, {10, 10, 20, 20},
-                                {10, 10, 100, 100}, DlFilterMode::kLinear,
-                                &paint);
-          SkRSXform xforms[] = {{1, 0, 10, 10}, {0, 1, 10, 10}};
-          SkRect rects[] = {{10, 10, 20, 20}, {10, 20, 30, 20}};
-          builder.DrawAtlas(TestImage1, xforms, rects, nullptr, 2,
-                            DlBlendMode::kSrcOver, DlImageSampling::kLinear,
-                            nullptr, &paint);
-          builder.DrawTextBlob(TestBlob1, 10, 10, paint);
-
-          // Dst mode eliminates most rendering ops except for
-          // the following two, so we'll prune those manually...
-          if (paint.getBlendMode() != DlBlendMode::kDst) {
-            builder.DrawDisplayList(TestDisplayList1, paint.getOpacity());
-            builder.DrawShadow(kTestPath1, paint.getColor(), 1, true, 1);
-          }
-        },
-        expected_op_count);
-    run_one_test(
-        name + " SaveLayer",
-        [](DisplayListBuilder& builder, DlPaint& paint) {
-          builder.SaveLayer(nullptr, &paint, nullptr);
-          builder.DrawRect({10, 10, 20, 20}, DlPaint());
-          builder.Restore();
-        },
-        expected_op_count);
-    run_one_test(
-        name + " inside Save",
-        [](DisplayListBuilder& builder, DlPaint& paint) {
-          builder.Save();
-          builder.DrawRect({10, 10, 20, 20}, paint);
-          builder.Restore();
-        },
-        expected_op_count);
-  };
-  run_tests("transparent color",  //
-            [](DisplayListBuilder& builder, DlPaint& paint) {
-              paint.setColor(DlColor::kTransparent());
-            });
-  run_tests("0 alpha",  //
-            [](DisplayListBuilder& builder, DlPaint& paint) {
-              // The transparent test above already tested transparent
-              // black (all 0s), we set White color here so we can test
-              // the case of all 1s with a 0 alpha
-              paint.setColor(DlColor::kWhite());
-              paint.setAlpha(0);
-            });
-  run_tests("BlendMode::kDst",  //
-            [](DisplayListBuilder& builder, DlPaint& paint) {
-              paint.setBlendMode(DlBlendMode::kDst);
-            });
-  run_tests("Empty rect clip",  //
-            [](DisplayListBuilder& builder, DlPaint& paint) {
-              builder.ClipRect(SkRect::MakeEmpty(), ClipOp::kIntersect, false);
-            });
-  run_tests("Empty rrect clip",  //
-            [](DisplayListBuilder& builder, DlPaint& paint) {
-              builder.ClipRRect(SkRRect::MakeEmpty(), ClipOp::kIntersect,
-                                false);
-            });
-  run_tests("Empty path clip",  //
-            [](DisplayListBuilder& builder, DlPaint& paint) {
-              builder.ClipPath(SkPath(), ClipOp::kIntersect, false);
-            });
-  run_tests("Transparent SaveLayer",  //
-            [](DisplayListBuilder& builder, DlPaint& paint) {
-              DlPaint save_paint;
-              save_paint.setColor(DlColor::kTransparent());
-              builder.SaveLayer(nullptr, &save_paint);
-            });
-  run_tests("0 alpha SaveLayer",  //
-            [](DisplayListBuilder& builder, DlPaint& paint) {
-              DlPaint save_paint;
-              // The transparent test above already tested transparent
-              // black (all 0s), we set White color here so we can test
-              // the case of all 1s with a 0 alpha
-              save_paint.setColor(DlColor::kWhite());
-              save_paint.setAlpha(0);
-              builder.SaveLayer(nullptr, &save_paint);
-            });
-  run_tests("Dst blended SaveLayer",  //
-            [](DisplayListBuilder& builder, DlPaint& paint) {
-              DlPaint save_paint;
-              save_paint.setBlendMode(DlBlendMode::kDst);
-              builder.SaveLayer(nullptr, &save_paint);
-            });
-  run_tests(
-      "Nop inside SaveLayer",
-      [](DisplayListBuilder& builder, DlPaint& paint) {
-        builder.SaveLayer(nullptr, nullptr);
-        paint.setBlendMode(DlBlendMode::kDst);
-      },
-      2u);
-  run_tests("DrawImage inside Culled SaveLayer",  //
-            [](DisplayListBuilder& builder, DlPaint& paint) {
-              DlPaint save_paint;
-              save_paint.setColor(DlColor::kTransparent());
-              builder.SaveLayer(nullptr, &save_paint);
-              builder.DrawImage(TestImage1, {10, 10}, DlImageSampling::kLinear);
-            });
-}
-
 }  // namespace testing
 }  // namespace flutter