[Impeller] add goldens for filter optimizations. (#41033)

[Impeller] add goldens for filter optimizations.

Author: Jonah Williams

impeller/aiks/aiks_unittests.cc

@@ -1880,6 +1880,83 @@ TEST_P(AiksTest, DrawPaintAbsorbsClears) {
   ASSERT_EQ(picture.pass->GetClearColor(), Color::CornflowerBlue());
 }
 
+TEST_P(AiksTest, ForegroundBlendSubpassCollapseOptimization) {
+  Canvas canvas;
+
+  canvas.SaveLayer({
+      .color_filter =
+          [](FilterInput::Ref input) {
+            return ColorFilterContents::MakeBlend(
+                BlendMode::kColorDodge, {std::move(input)}, Color::Red());
+          },
+  });
+
+  canvas.Translate({500, 300, 0});
+  canvas.Rotate(Radians(2 * kPi / 3));
+  canvas.DrawRect({100, 100, 200, 200}, {.color = Color::Blue()});
+
+  ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
+}
+
+TEST_P(AiksTest, ColorMatrixFilterSubpassCollapseOptimization) {
+  Canvas canvas;
+
+  canvas.SaveLayer({
+      .color_filter =
+          [](FilterInput::Ref input) {
+            return ColorFilterContents::MakeColorMatrix(
+                std::move(input), {.array = {
+                                       -1.0, 0,    0,    1.0, 0,  //
+                                       0,    -1.0, 0,    1.0, 0,  //
+                                       0,    0,    -1.0, 1.0, 0,  //
+                                       1.0,  1.0,  1.0,  1.0, 0   //
+                                   }});
+          },
+  });
+
+  canvas.Translate({500, 300, 0});
+  canvas.Rotate(Radians(2 * kPi / 3));
+  canvas.DrawRect({100, 100, 200, 200}, {.color = Color::Blue()});
+
+  ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
+}
+
+TEST_P(AiksTest, LinearToSrgbFilterSubpassCollapseOptimization) {
+  Canvas canvas;
+
+  canvas.SaveLayer({
+      .color_filter =
+          [](FilterInput::Ref input) {
+            return ColorFilterContents::MakeLinearToSrgbFilter(
+                std::move(input));
+          },
+  });
+
+  canvas.Translate({500, 300, 0});
+  canvas.Rotate(Radians(2 * kPi / 3));
+  canvas.DrawRect({100, 100, 200, 200}, {.color = Color::Blue()});
+
+  ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
+}
+
+TEST_P(AiksTest, SrgbToLinearFilterSubpassCollapseOptimization) {
+  Canvas canvas;
+
+  canvas.SaveLayer({
+      .color_filter =
+          [](FilterInput::Ref input) {
+            return ColorFilterContents::MakeSrgbToLinearFilter(
+                std::move(input));
+          },
+  });
+
+  canvas.Translate({500, 300, 0});
+  canvas.Rotate(Radians(2 * kPi / 3));
+  canvas.DrawRect({100, 100, 200, 200}, {.color = Color::Blue()});
+
+  ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
+}
+
 static Picture BlendModeSaveLayerTest(BlendMode blend_mode) {
   Canvas canvas;
   canvas.DrawPaint({.color = Color::CornflowerBlue().WithAlpha(0.75)});

impeller/golden_tests/golden_playground_test_mac.cc

@@ -10,6 +10,21 @@
 
 namespace impeller {
 
+// If you add a new playground test to the aiks unittests and you do not want it
+// to also be a golden test, then add the test name here.
+static const std::vector<std::string> kSkipTests = {
+    "impeller_Play_AiksTest_CanRenderLinearGradientManyColorsUnevenStops_Metal",
+    "impeller_Play_AiksTest_CanRenderRadialGradient_Metal",
+    "impeller_Play_AiksTest_CanRenderRadialGradientManyColors_Metal",
+    "impeller_Play_AiksTest_TextFrameSubpixelAlignment_Metal",
+    "impeller_Play_AiksTest_ColorWheel_Metal",
+    "impeller_Play_AiksTest_SolidStrokesRenderCorrectly_Metal",
+    "impeller_Play_AiksTest_GradientStrokesRenderCorrectly_Metal",
+    "impeller_Play_AiksTest_CoverageOriginShouldBeAccountedForInSubpasses_"
+    "Metal",
+    "impeller_Play_AiksTest_SceneColorSource_Metal",
+};
+
 namespace {
 std::string GetTestName() {
   std::string suite_name =
@@ -57,21 +72,8 @@ void GoldenPlaygroundTest::SetUp() {
   }
 
   std::string test_name = GetTestName();
-  if (test_name ==
-          "impeller_Play_AiksTest_CanRenderLinearGradientManyColorsUnevenStops_"
-          "Metal" ||
-      test_name == "impeller_Play_AiksTest_CanRenderRadialGradient_Metal" ||
-      test_name ==
-          "impeller_Play_AiksTest_CanRenderRadialGradientManyColors_Metal" ||
-      test_name == "impeller_Play_AiksTest_TextFrameSubpixelAlignment_Metal" ||
-      test_name == "impeller_Play_AiksTest_ColorWheel_Metal" ||
-      test_name == "impeller_Play_AiksTest_SolidStrokesRenderCorrectly_Metal" ||
-      test_name ==
-          "impeller_Play_AiksTest_GradientStrokesRenderCorrectly_Metal" ||
-      test_name ==
-          "impeller_Play_AiksTest_"
-          "CoverageOriginShouldBeAccountedForInSubpasses_Metal" ||
-      test_name == "impeller_Play_AiksTest_SceneColorSource_Metal") {
+  if (std::find(kSkipTests.begin(), kSkipTests.end(), test_name) !=
+      kSkipTests.end()) {
     GTEST_SKIP_(
         "GoldenPlaygroundTest doesn't support interactive playground tests "
         "yet.");