Flutter Impeller
filter_input.cc
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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 
6 
7 #include <memory>
8 #include <utility>
9 
10 #include "flutter/fml/logging.h"
16 
17 namespace impeller {
18 
19 FilterInput::Ref FilterInput::Make(Variant input, bool msaa_enabled) {
20  if (auto filter = std::get_if<std::shared_ptr<FilterContents>>(&input)) {
21  return std::static_pointer_cast<FilterInput>(
22  std::shared_ptr<FilterContentsFilterInput>(
23  new FilterContentsFilterInput(*filter)));
24  }
25 
26  if (auto contents = std::get_if<std::shared_ptr<Contents>>(&input)) {
27  return std::static_pointer_cast<FilterInput>(
28  std::shared_ptr<ContentsFilterInput>(
29  new ContentsFilterInput(*contents, msaa_enabled)));
30  }
31 
32  if (auto texture = std::get_if<std::shared_ptr<Texture>>(&input)) {
33  return Make(*texture, Matrix());
34  }
35 
36  if (auto rect = std::get_if<Rect>(&input)) {
37  return std::shared_ptr<PlaceholderFilterInput>(
38  new PlaceholderFilterInput(*rect));
39  }
40 
41  FML_UNREACHABLE();
42 }
43 
44 FilterInput::Ref FilterInput::Make(std::shared_ptr<Texture> texture,
45  Matrix local_transform) {
46  return std::shared_ptr<TextureFilterInput>(
47  new TextureFilterInput(std::move(texture), local_transform));
48 }
49 
50 FilterInput::Vector FilterInput::Make(std::initializer_list<Variant> inputs) {
51  FilterInput::Vector result;
52  result.reserve(inputs.size());
53  for (const auto& input : inputs) {
54  result.push_back(Make(input));
55  }
56  return result;
57 }
58 
60  return Matrix();
61 }
62 
63 std::optional<Rect> FilterInput::GetLocalCoverage(const Entity& entity) const {
64  Entity local_entity = entity.Clone();
65  local_entity.SetTransform(GetLocalTransform(entity));
66  return GetCoverage(local_entity);
67 }
68 
69 std::optional<Rect> FilterInput::GetSourceCoverage(
70  const Matrix& effect_transform,
71  const Rect& output_limit) const {
72  return output_limit;
73 }
74 
75 Matrix FilterInput::GetTransform(const Entity& entity) const {
76  return entity.GetTransform() * GetLocalTransform(entity);
77 }
78 
80  const std::shared_ptr<LazyGlyphAtlas>& lazy_glyph_atlas,
81  Scalar scale) {}
82 
83 FilterInput::~FilterInput() = default;
84 
86  return true;
87 }
88 
89 bool FilterInput::IsLeaf() const {
90  return true;
91 }
92 
94 
96 
98 
99 } // namespace impeller
impeller::FilterContentsFilterInput
Definition: filter_contents_filter_input.h:12
texture_filter_input.h
impeller::Scalar
float Scalar
Definition: scalar.h:18
impeller::FilterInput::SetEffectTransform
virtual void SetEffectTransform(const Matrix &matrix)
Sets the effect transform of filter inputs.
Definition: filter_input.cc:95
impeller::Entity::GetTransform
const Matrix & GetTransform() const
Get the global transform matrix for this Entity.
Definition: entity.cc:49
impeller::FilterInput::IsLeaf
virtual bool IsLeaf() const
Returns true unless this input is a FilterInput, which may take other inputs.
Definition: filter_input.cc:89
impeller::FilterInput::Make
static FilterInput::Ref Make(Variant input, bool msaa_enabled=true)
Definition: filter_input.cc:19
impeller::FilterInput::IsTranslationOnly
virtual bool IsTranslationOnly() const
Definition: filter_input.cc:85
impeller::FilterInput::Ref
std::shared_ptr< FilterInput > Ref
Definition: filter_input.h:32
placeholder_filter_input.h
impeller::TextureFilterInput
Definition: texture_filter_input.h:14
impeller::FilterInput::GetTransform
virtual Matrix GetTransform(const Entity &entity) const
Get the transform of this FilterInput. This is equivalent to calling entity.GetTransform() * GetLocal...
Definition: filter_input.cc:75
impeller::FilterInput::GetCoverage
virtual std::optional< Rect > GetCoverage(const Entity &entity) const =0
impeller::Entity
Definition: entity.h:21
filter_contents.h
impeller::ContentsFilterInput
Definition: contents_filter_input.h:12
impeller::FilterInput::Variant
std::variant< std::shared_ptr< FilterContents >, std::shared_ptr< Contents >, std::shared_ptr< Texture >, Rect > Variant
Definition: filter_input.h:37
filter_input.h
impeller::FilterInput::SetLeafInputs
virtual void SetLeafInputs(const FilterInput::Vector &inputs)
Replaces the inputs of all leaf FilterContents with a new set of inputs.
Definition: filter_input.cc:93
filter_contents_filter_input.h
impeller::FilterInput::SetRenderingMode
virtual void SetRenderingMode(Entity::RenderingMode rendering_mode)
Turns on subpass mode for filter inputs.
Definition: filter_input.cc:97
impeller::Entity::SetTransform
void SetTransform(const Matrix &transform)
Set the global transform matrix for this Entity.
Definition: entity.cc:65
impeller::Entity::Clone
Entity Clone() const
Definition: entity.cc:210
impeller::FilterInput::GetLocalCoverage
std::optional< Rect > GetLocalCoverage(const Entity &entity) const
Definition: filter_input.cc:63
scale
const Scalar scale
Definition: stroke_path_geometry.cc:297
contents_filter_input.h
impeller::Entity::RenderingMode
RenderingMode
Definition: entity.h:28
impeller::FilterInput::Vector
std::vector< FilterInput::Ref > Vector
Definition: filter_input.h:33
impeller
Definition: aiks_blur_unittests.cc:20
impeller::FilterInput::GetSourceCoverage
virtual std::optional< Rect > GetSourceCoverage(const Matrix &effect_transform, const Rect &output_limit) const
Definition: filter_input.cc:69
impeller::TRect< Scalar >
impeller::FilterInput::PopulateGlyphAtlas
virtual void PopulateGlyphAtlas(const std::shared_ptr< LazyGlyphAtlas > &lazy_glyph_atlas, Scalar scale)
Definition: filter_input.cc:79
impeller::Matrix
A 4x4 matrix using column-major storage.
Definition: matrix.h:37
impeller::FilterInput::GetLocalTransform
virtual Matrix GetLocalTransform(const Entity &entity) const
Get the local transform of this filter input. This transform is relative to the Entity transform spac...
Definition: filter_input.cc:59
impeller::PlaceholderFilterInput
Definition: placeholder_filter_input.h:12
impeller::FilterInput::~FilterInput
virtual ~FilterInput()