Flutter Impeller
paint_pass_delegate.h
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #ifndef FLUTTER_IMPELLER_AIKS_PAINT_PASS_DELEGATE_H_
6 #define FLUTTER_IMPELLER_AIKS_PAINT_PASS_DELEGATE_H_
7 
8 #include <optional>
9 
10 #include "flutter/fml/macros.h"
11 #include "impeller/aiks/paint.h"
13 
14 namespace impeller {
15 
16 class PaintPassDelegate final : public EntityPassDelegate {
17  public:
18  explicit PaintPassDelegate(Paint paint);
19 
20  // |EntityPassDelgate|
21  ~PaintPassDelegate() override;
22 
23  // |EntityPassDelgate|
24  bool CanElide() override;
25 
26  // |EntityPassDelgate|
27  bool CanCollapseIntoParentPass(EntityPass* entity_pass) override;
28 
29  // |EntityPassDelgate|
30  std::shared_ptr<Contents> CreateContentsForSubpassTarget(
31  std::shared_ptr<Texture> target,
32  const Matrix& effect_transform) override;
33 
34  // |EntityPassDelgate|
35  std::shared_ptr<FilterContents> WithImageFilter(
36  const FilterInput::Variant& input,
37  const Matrix& effect_transform) const override;
38 
39  private:
40  const Paint paint_;
41 
42  PaintPassDelegate(const PaintPassDelegate&) = delete;
43 
44  PaintPassDelegate& operator=(const PaintPassDelegate&) = delete;
45 };
46 
47 /// A delegate that attempts to forward opacity from a save layer to
48 /// child contents.
49 ///
50 /// Currently this has a hardcoded limit of 3 entities in a pass, and
51 /// cannot forward to child subpass delegates.
53  public:
54  explicit OpacityPeepholePassDelegate(Paint paint);
55 
56  // |EntityPassDelgate|
58 
59  // |EntityPassDelgate|
60  bool CanElide() override;
61 
62  // |EntityPassDelgate|
63  bool CanCollapseIntoParentPass(EntityPass* entity_pass) override;
64 
65  // |EntityPassDelgate|
66  std::shared_ptr<Contents> CreateContentsForSubpassTarget(
67  std::shared_ptr<Texture> target,
68  const Matrix& effect_transform) override;
69 
70  // |EntityPassDelgate|
71  std::shared_ptr<FilterContents> WithImageFilter(
72  const FilterInput::Variant& input,
73  const Matrix& effect_transform) const override;
74 
75  private:
76  const Paint paint_;
77 
79 
81  delete;
82 };
83 
84 } // namespace impeller
85 
86 #endif // FLUTTER_IMPELLER_AIKS_PAINT_PASS_DELEGATE_H_
impeller::PaintPassDelegate::CreateContentsForSubpassTarget
std::shared_ptr< Contents > CreateContentsForSubpassTarget(std::shared_ptr< Texture > target, const Matrix &effect_transform) override
Definition: paint_pass_delegate.cc:35
entity_pass_delegate.h
impeller::Paint
Definition: paint.h:23
impeller::EntityPassDelegate
Definition: entity_pass_delegate.h:19
impeller::OpacityPeepholePassDelegate
Definition: paint_pass_delegate.h:52
impeller::EntityPass
Definition: entity_pass.h:43
impeller::PaintPassDelegate::CanCollapseIntoParentPass
bool CanCollapseIntoParentPass(EntityPass *entity_pass) override
Whether or not this entity pass can be collapsed into the parent. If true, this method may modify the...
Definition: paint_pass_delegate.cc:30
impeller::OpacityPeepholePassDelegate::OpacityPeepholePassDelegate
OpacityPeepholePassDelegate(Paint paint)
Definition: paint_pass_delegate.cc:60
impeller::FilterInput::Variant
std::variant< std::shared_ptr< FilterContents >, std::shared_ptr< Contents >, std::shared_ptr< Texture >, Rect > Variant
Definition: filter_input.h:37
impeller::OpacityPeepholePassDelegate::CanCollapseIntoParentPass
bool CanCollapseIntoParentPass(EntityPass *entity_pass) override
Whether or not this entity pass can be collapsed into the parent. If true, this method may modify the...
Definition: paint_pass_delegate.cc:72
impeller::PaintPassDelegate
Definition: paint_pass_delegate.h:16
impeller::PaintPassDelegate::PaintPassDelegate
PaintPassDelegate(Paint paint)
Definition: paint_pass_delegate.cc:19
impeller::OpacityPeepholePassDelegate::~OpacityPeepholePassDelegate
~OpacityPeepholePassDelegate() override
impeller::PaintPassDelegate::WithImageFilter
std::shared_ptr< FilterContents > WithImageFilter(const FilterInput::Variant &input, const Matrix &effect_transform) const override
Definition: paint_pass_delegate.cc:50
impeller::PaintPassDelegate::~PaintPassDelegate
~PaintPassDelegate() override
paint.h
impeller::OpacityPeepholePassDelegate::CreateContentsForSubpassTarget
std::shared_ptr< Contents > CreateContentsForSubpassTarget(std::shared_ptr< Texture > target, const Matrix &effect_transform) override
Definition: paint_pass_delegate.cc:137
impeller::OpacityPeepholePassDelegate::WithImageFilter
std::shared_ptr< FilterContents > WithImageFilter(const FilterInput::Variant &input, const Matrix &effect_transform) const override
Definition: paint_pass_delegate.cc:152
impeller::PaintPassDelegate::CanElide
bool CanElide() override
Definition: paint_pass_delegate.cc:25
impeller
Definition: aiks_blur_unittests.cc:20
impeller::Matrix
A 4x4 matrix using column-major storage.
Definition: matrix.h:37
impeller::OpacityPeepholePassDelegate::CanElide
bool CanElide() override
Definition: paint_pass_delegate.cc:67