[Impeller] make color filter objects inspectable.

ci/licenses_golden/licenses_flutter

@@ -1129,6 +1129,8 @@ ORIGIN: ../../../flutter/impeller/aiks/aiks_playground.cc + ../../../flutter/LIC
 ORIGIN: ../../../flutter/impeller/aiks/aiks_playground.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/aiks/canvas.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/aiks/canvas.h + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/aiks/color_filter_factory.cc + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/aiks/color_filter_factory.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/aiks/image.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/aiks/image.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/aiks/paint.cc + ../../../flutter/LICENSE
@@ -1225,6 +1227,10 @@ ORIGIN: ../../../flutter/impeller/compiler/types.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/compiler/types.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/compiler/utilities.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/compiler/utilities.h + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/display_list/conversion.cc + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/display_list/conversion.h + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/display_list/display_list_color_filter.cc + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/display_list/display_list_color_filter.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/display_list/display_list_dispatcher.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/display_list/display_list_dispatcher.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/display_list/display_list_image_impeller.cc + ../../../flutter/LICENSE
@@ -3605,6 +3611,8 @@ FILE: ../../../flutter/impeller/aiks/aiks_playground.cc
 FILE: ../../../flutter/impeller/aiks/aiks_playground.h
 FILE: ../../../flutter/impeller/aiks/canvas.cc
 FILE: ../../../flutter/impeller/aiks/canvas.h
+FILE: ../../../flutter/impeller/aiks/color_filter_factory.cc
+FILE: ../../../flutter/impeller/aiks/color_filter_factory.h
 FILE: ../../../flutter/impeller/aiks/image.cc
 FILE: ../../../flutter/impeller/aiks/image.h
 FILE: ../../../flutter/impeller/aiks/paint.cc
@@ -3701,6 +3709,10 @@ FILE: ../../../flutter/impeller/compiler/types.cc
 FILE: ../../../flutter/impeller/compiler/types.h
 FILE: ../../../flutter/impeller/compiler/utilities.cc
 FILE: ../../../flutter/impeller/compiler/utilities.h
+FILE: ../../../flutter/impeller/display_list/conversion.cc
+FILE: ../../../flutter/impeller/display_list/conversion.h
+FILE: ../../../flutter/impeller/display_list/display_list_color_filter.cc
+FILE: ../../../flutter/impeller/display_list/display_list_color_filter.h
 FILE: ../../../flutter/impeller/display_list/display_list_dispatcher.cc
 FILE: ../../../flutter/impeller/display_list/display_list_dispatcher.h
 FILE: ../../../flutter/impeller/display_list/display_list_image_impeller.cc

impeller/aiks/BUILD.gn

@@ -10,6 +10,8 @@ impeller_component("aiks") {
     "aiks_context.h",
     "canvas.cc",
     "canvas.h",
+    "color_filter_factory.cc",
+    "color_filter_factory.h",
     "image.cc",
     "image.h",
     "paint.cc",

impeller/aiks/color_filter_factory.cc

@@ -0,0 +1,11 @@
+// Copyright 2013 The Flutter 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 "impeller/aiks/color_filter_factory.h"
+
+namespace impeller {
+
+ColorFilterFactory::~ColorFilterFactory() = default;
+
+}  // namespace impeller

impeller/aiks/color_filter_factory.h

@@ -0,0 +1,30 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#pragma once
+
+#include <memory>
+
+#include "impeller/entity/contents/filters/color_filter_contents.h"
+
+namespace impeller {
+
+class ColorFilterFactory {
+ public:
+  enum class ColorSourceType {
+    kBlend,
+    kMatrix,
+    kSrgbToLinearGamma,
+    kLinearToSrgbGamma,
+  };
+
+  virtual ~ColorFilterFactory();
+
+  virtual std::shared_ptr<ColorFilterContents> MakeContents(
+      FilterInput::Ref input) const = 0;
+
+  virtual ColorSourceType GetType() const = 0;
+};
+
+}  // namespace impeller

impeller/aiks/paint.cc

@@ -85,8 +85,8 @@ std::shared_ptr<Contents> Paint::WithColorFilter(
     std::shared_ptr<Contents> input,
     bool absorb_opacity) const {
   if (color_filter.has_value()) {
-    const ColorFilterProc& filter = color_filter.value();
-    auto color_filter_contents = filter(FilterInput::Make(input));
+    auto filter = color_filter.value();
+    auto color_filter_contents = filter->MakeContents(FilterInput::Make(input));
     if (color_filter_contents) {
       color_filter_contents->SetAbsorbOpacity(absorb_opacity);
     }

impeller/aiks/paint.h

@@ -7,6 +7,7 @@
 #include <memory>
 
 #include "flutter/fml/macros.h"
+#include "impeller/aiks/color_filter_factory.h"
 #include "impeller/entity/contents/contents.h"
 #include "impeller/entity/contents/filters/color_filter_contents.h"
 #include "impeller/entity/contents/filters/filter_contents.h"
@@ -69,7 +70,7 @@ struct Paint {
   BlendMode blend_mode = BlendMode::kSourceOver;
 
   std::optional<ImageFilterProc> image_filter;
-  std::optional<ColorFilterProc> color_filter;
+  std::optional<std::shared_ptr<ColorFilterFactory>> color_filter;
   std::optional<MaskBlurDescriptor> mask_blur_descriptor;
 
   /// @brief      Wrap this paint's configured filters to the given contents.

impeller/display_list/BUILD.gn

@@ -6,6 +6,10 @@ import("//flutter/impeller/tools/impeller.gni")
 
 impeller_component("display_list") {
   sources = [
+    "conversion.cc",
+    "conversion.h",
+    "display_list_color_filter.cc",
+    "display_list_color_filter.h",
     "display_list_dispatcher.cc",
     "display_list_dispatcher.h",
     "display_list_image_impeller.cc",

impeller/display_list/conversion.cc

@@ -0,0 +1,95 @@
+// Copyright 2013 The Flutter 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 "flutter/impeller/display_list/conversion.h"
+
+namespace impeller {
+
+BlendMode ToBlendMode(flutter::DlBlendMode mode) {
+  switch (mode) {
+    case flutter::DlBlendMode::kClear:
+      return BlendMode::kClear;
+    case flutter::DlBlendMode::kSrc:
+      return BlendMode::kSource;
+    case flutter::DlBlendMode::kDst:
+      return BlendMode::kDestination;
+    case flutter::DlBlendMode::kSrcOver:
+      return BlendMode::kSourceOver;
+    case flutter::DlBlendMode::kDstOver:
+      return BlendMode::kDestinationOver;
+    case flutter::DlBlendMode::kSrcIn:
+      return BlendMode::kSourceIn;
+    case flutter::DlBlendMode::kDstIn:
+      return BlendMode::kDestinationIn;
+    case flutter::DlBlendMode::kSrcOut:
+      return BlendMode::kSourceOut;
+    case flutter::DlBlendMode::kDstOut:
+      return BlendMode::kDestinationOut;
+    case flutter::DlBlendMode::kSrcATop:
+      return BlendMode::kSourceATop;
+    case flutter::DlBlendMode::kDstATop:
+      return BlendMode::kDestinationATop;
+    case flutter::DlBlendMode::kXor:
+      return BlendMode::kXor;
+    case flutter::DlBlendMode::kPlus:
+      return BlendMode::kPlus;
+    case flutter::DlBlendMode::kModulate:
+      return BlendMode::kModulate;
+    case flutter::DlBlendMode::kScreen:
+      return BlendMode::kScreen;
+    case flutter::DlBlendMode::kOverlay:
+      return BlendMode::kOverlay;
+    case flutter::DlBlendMode::kDarken:
+      return BlendMode::kDarken;
+    case flutter::DlBlendMode::kLighten:
+      return BlendMode::kLighten;
+    case flutter::DlBlendMode::kColorDodge:
+      return BlendMode::kColorDodge;
+    case flutter::DlBlendMode::kColorBurn:
+      return BlendMode::kColorBurn;
+    case flutter::DlBlendMode::kHardLight:
+      return BlendMode::kHardLight;
+    case flutter::DlBlendMode::kSoftLight:
+      return BlendMode::kSoftLight;
+    case flutter::DlBlendMode::kDifference:
+      return BlendMode::kDifference;
+    case flutter::DlBlendMode::kExclusion:
+      return BlendMode::kExclusion;
+    case flutter::DlBlendMode::kMultiply:
+      return BlendMode::kMultiply;
+    case flutter::DlBlendMode::kHue:
+      return BlendMode::kHue;
+    case flutter::DlBlendMode::kSaturation:
+      return BlendMode::kSaturation;
+    case flutter::DlBlendMode::kColor:
+      return BlendMode::kColor;
+    case flutter::DlBlendMode::kLuminosity:
+      return BlendMode::kLuminosity;
+  }
+  FML_UNREACHABLE();
+}
+
+Entity::TileMode ToTileMode(flutter::DlTileMode tile_mode) {
+  switch (tile_mode) {
+    case flutter::DlTileMode::kClamp:
+      return Entity::TileMode::kClamp;
+    case flutter::DlTileMode::kRepeat:
+      return Entity::TileMode::kRepeat;
+    case flutter::DlTileMode::kMirror:
+      return Entity::TileMode::kMirror;
+    case flutter::DlTileMode::kDecal:
+      return Entity::TileMode::kDecal;
+  }
+}
+
+Color ToColor(const SkColor& color) {
+  return {
+      static_cast<Scalar>(SkColorGetR(color) / 255.0),  //
+      static_cast<Scalar>(SkColorGetG(color) / 255.0),  //
+      static_cast<Scalar>(SkColorGetB(color) / 255.0),  //
+      static_cast<Scalar>(SkColorGetA(color) / 255.0)   //
+  };
+}
+
+}  // namespace impeller

impeller/display_list/conversion.h

@@ -0,0 +1,22 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#pragma once
+
+#include "flutter/display_list/display_list_blend_mode.h"
+#include "flutter/display_list/display_list_tile_mode.h"
+#include "flutter/impeller/entity/entity.h"
+#include "flutter/impeller/geometry/color.h"
+#include "flutter/impeller/geometry/scalar.h"
+#include "third_party/skia/include/core/SkColor.h"
+
+namespace impeller {
+
+BlendMode ToBlendMode(flutter::DlBlendMode mode);
+
+Entity::TileMode ToTileMode(flutter::DlTileMode tile_mode);
+
+Color ToColor(const SkColor& color);
+
+}  // namespace impeller

impeller/display_list/display_list_color_filter.cc

@@ -0,0 +1,82 @@
+// Copyright 2013 The Flutter 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 "impeller/display_list/display_list_color_filter.h"
+#include "impeller/aiks/color_filter_factory.h"
+#include "impeller/display_list/conversion.h"
+#include "impeller/entity/contents/color_source_contents.h"
+
+namespace impeller {
+
+DlBlendColorFilterFactory::DlBlendColorFilterFactory(
+    const flutter::DlColorFilter* filter)
+    : filter_(filter->asBlend()) {}
+
+DlBlendColorFilterFactory::~DlBlendColorFilterFactory() {}
+
+ColorFilterFactory::ColorSourceType DlBlendColorFilterFactory::GetType() const {
+  return ColorFilterFactory::ColorSourceType::kBlend;
+}
+
+std::shared_ptr<ColorFilterContents> DlBlendColorFilterFactory::MakeContents(
+    FilterInput::Ref input) const {
+  auto blend_mode = ToBlendMode(filter_->mode());
+  auto color = ToColor(filter_->color());
+  return ColorFilterContents::MakeBlend(blend_mode, {std::move(input)}, color);
+}
+
+/// DlMatrixColorFilterFactory
+
+DlMatrixColorFilterFactory::DlMatrixColorFilterFactory(
+    const flutter::DlColorFilter* filter)
+    : filter_(filter->asMatrix()) {}
+
+DlMatrixColorFilterFactory::~DlMatrixColorFilterFactory() {}
+
+ColorFilterFactory::ColorSourceType DlMatrixColorFilterFactory::GetType()
+    const {
+  return ColorFilterFactory::ColorSourceType::kMatrix;
+}
+
+std::shared_ptr<ColorFilterContents> DlMatrixColorFilterFactory::MakeContents(
+    FilterInput::Ref input) const {
+  const flutter::DlMatrixColorFilter* dl_matrix = filter_->asMatrix();
+  impeller::FilterContents::ColorMatrix color_matrix;
+  dl_matrix->get_matrix(color_matrix.array);
+  return ColorFilterContents::MakeColorMatrix({std::move(input)}, color_matrix);
+}
+
+/// DlSrgbToLinearColorFilterFactory
+
+DlSrgbToLinearColorFilterFactory::DlSrgbToLinearColorFilterFactory() {}
+
+DlSrgbToLinearColorFilterFactory::~DlSrgbToLinearColorFilterFactory() {}
+
+ColorFilterFactory::ColorSourceType DlSrgbToLinearColorFilterFactory::GetType()
+    const {
+  return ColorFilterFactory::ColorSourceType::kSrgbToLinearGamma;
+}
+
+std::shared_ptr<ColorFilterContents>
+DlSrgbToLinearColorFilterFactory::MakeContents(FilterInput::Ref input) const {
+  return ColorFilterContents::MakeSrgbToLinearFilter({std::move(input)});
+}
+
+/// DlLinearToSrgbColorFilterFactory
+
+DlLinearToSrgbColorFilterFactory::DlLinearToSrgbColorFilterFactory() {}
+
+DlLinearToSrgbColorFilterFactory::~DlLinearToSrgbColorFilterFactory() {}
+
+ColorFilterFactory::ColorSourceType DlLinearToSrgbColorFilterFactory::GetType()
+    const {
+  return ColorFilterFactory::ColorSourceType::kLinearToSrgbGamma;
+}
+
+std::shared_ptr<ColorFilterContents>
+DlLinearToSrgbColorFilterFactory::MakeContents(FilterInput::Ref input) const {
+  return ColorFilterContents::MakeLinearToSrgbFilter({std::move(input)});
+}
+
+}  // namespace impeller