| Flutter Impeller |

Public Types | Public Member Functions | Static Public Member Functions | Static Public Attributes | List of all members
impeller::FilterContents Class Referenceabstract

`#include <filter_contents.h>`

Inheritance diagram for impeller::FilterContents:

## Public Types
enum | BlurStyle { BlurStyle::kNormal, BlurStyle::kSolid, BlurStyle::kOuter, BlurStyle::kInner }
enum | MorphType { MorphType::kDilate, MorphType::kErode }
Public Types inherited from impeller::Contents
using | ColorFilterProc = std::function< Color(Color)>
using | RenderProc = std::function< bool(const ContentContext &renderer, const Entity &entity, RenderPass &pass)>
using | CoverageProc = std::function< std::optional< Rect >(const Entity &entity)>

## Public Member Functions
| FilterContents ()
| ~FilterContents () override
void | SetInputs (FilterInput::Vector inputs)
| The input texture sources for this filter. Each input's emitted texture is expected to have premultiplied alpha colors. More...
void | SetEffectTransform (const Matrix &effect_transform)
| Sets the transform which gets appended to the effect of this filter. Note that this is in addition to the entity's transform. More...
std::optional< Entity > | GetEntity (const ContentContext &renderer, const Entity &entity, const std::optional< Rect > &coverage_hint) const
| Create an Entity that renders this filter's output. More...
bool | Render (const ContentContext &renderer, const Entity &entity, RenderPass &pass) const override
std::optional< Rect > | GetCoverage (const Entity &entity) const override
| Get the area of the render pass that will be affected when this contents is rendered. More...
void | PopulateGlyphAtlas (const std::shared_ptr< LazyGlyphAtlas > &lazy_glyph_atlas, Scalar scale) override
| Add any text data to the specified lazy atlas. The scale parameter must be used again later when drawing the text. More...
std::optional< Snapshot > | RenderToSnapshot (const ContentContext &renderer, const Entity &entity, std::optional< Rect > coverage_limit=std::nullopt, const std::optional< SamplerDescriptor > &sampler_descriptor=std::nullopt, bool msaa_enabled=true, int32_t mip_count=1, const std::string &label="Filter Snapshot") const override
| Render this contents to a snapshot, respecting the entity's transform, path, clip depth, and blend mode. The result texture size is always the size of `GetCoverage(entity)`. More...
const FilterContents * | AsFilter () const override
| Cast to a filter. Returns `nullptr` if this Contents is not a filter. More...
std::optional< Rect > | GetSourceCoverage (const Matrix &effect_transform, const Rect &output_limit) const
| Determines the coverage of source pixels that will be needed to produce results for the specified |output_limit| under the specified |effect_transform|. This is essentially a reverse of the |GetCoverage| method computing a source coverage from an intended |output_limit| coverage. More...
virtual Matrix | GetLocalTransform (const Matrix &parent_transform) const
Matrix | GetTransform (const Matrix &parent_transform) const
virtual bool | IsTranslationOnly () const
| Returns true if this filter graph doesn't perform any basis transforms to the filtered content. For example: Rotating, scaling, and skewing are all basis transforms, but translating is not. More...
bool | IsLeaf () const
| Returns `true` if this filter does not have any `FilterInput` children. More...
void | SetLeafInputs (const FilterInput::Vector &inputs)
| Replaces the set of all leaf `FilterContents` with a new set of `FilterInput`s. More...
virtual void | SetRenderingMode (Entity::RenderingMode rendering_mode)
| Marks this filter chain as applying in a subpass scenario. More...
Public Member Functions inherited from impeller::Contents
| Contents ()
virtual | ~Contents ()
void | SetCoverageHint (std::optional< Rect > coverage_hint)
| Hint that specifies the coverage area of this Contents that will actually be used during rendering. This is for optimization purposes only and can not be relied on as a clip. May optionally affect the result of `GetCoverage()`. More...
const std::optional< Rect > & | GetCoverageHint () const
virtual bool | IsOpaque () const
| Whether this Contents only emits opaque source colors from the fragment stage. This value does not account for any entity properties (e.g. the blend mode), clips/visibility culling, or inherited opacity. More...
virtual ClipCoverage | GetClipCoverage (const Entity &entity, const std::optional< Rect > &current_clip_coverage) const
| Given the current pass space bounding rectangle of the clip buffer, return the expected clip coverage after this draw call. This should only be implemented for contents that may write to the clip buffer. More...
virtual bool | ShouldRender (const Entity &entity, const std::optional< Rect > clip_coverage) const
std::optional< Size > | GetColorSourceSize () const
| Return the color source's intrinsic size, if available. More...
void | SetColorSourceSize (Size size)
virtual bool | CanInheritOpacity (const Entity &entity) const
| Whether or not this contents can accept the opacity peephole optimization. More...
virtual void | SetInheritedOpacity (Scalar opacity)
| Inherit the provided opacity. More...
virtual std::optional< Color > | AsBackgroundColor (const Entity &entity, ISize target_size) const
| Returns a color if this Contents will flood the given `target_size` with a color. This output color is the "Source" color that will be used for the Entity's blend operation. More...
virtual bool | ApplyColorFilter (const ColorFilterProc &color_filter_proc)
| If possible, applies a color filter to this contents inputs on the CPU. More...

## Static Public Member Functions
static std::shared_ptr< FilterContents > | MakeGaussianBlur (const FilterInput::Ref &input, Sigma sigma_x, Sigma sigma_y, Entity::TileMode tile_mode=Entity::TileMode::kDecal, BlurStyle mask_blur_style=BlurStyle::kNormal, const std::shared_ptr< Geometry > &mask_geometry=nullptr)
static std::shared_ptr< FilterContents > | MakeBorderMaskBlur (FilterInput::Ref input, Sigma sigma_x, Sigma sigma_y, BlurStyle blur_style=BlurStyle::kNormal)
static std::shared_ptr< FilterContents > | MakeDirectionalMorphology (FilterInput::Ref input, Radius radius, Vector2 direction, MorphType morph_type)
static std::shared_ptr< FilterContents > | MakeMorphology (FilterInput::Ref input, Radius radius_x, Radius radius_y, MorphType morph_type)
static std::shared_ptr< FilterContents > | MakeMatrixFilter (FilterInput::Ref input, const Matrix &matrix, const SamplerDescriptor &desc)
static std::shared_ptr< FilterContents > | MakeLocalMatrixFilter (FilterInput::Ref input, const Matrix &matrix)
static std::shared_ptr< FilterContents > | MakeYUVToRGBFilter (std::shared_ptr< Texture > y_texture, std::shared_ptr< Texture > uv_texture, YUVColorSpace yuv_color_space)
Static Public Member Functions inherited from impeller::Contents
static std::shared_ptr< Contents > | MakeAnonymous (RenderProc render_proc, CoverageProc coverage_proc)

## Static Public Attributes
static const int32_t | kBlurFilterRequiredMipCount

## Detailed Description

Definition at line 22 of file filter_contents.h.

## Member Enumeration Documentation

## ◆ BlurStyle

enum impeller::FilterContents::BlurStyle
| strong

Enumerator
kNormal | Blurred inside and outside.
kSolid | Solid inside, blurred outside.
kOuter | Nothing inside, blurred outside.
kInner | Blurred inside, nothing outside.

Definition at line 26 of file filter_contents.h.

26 {
27 /// Blurred inside and outside.
28 kNormal,
29 /// Solid inside, blurred outside.
30 kSolid,
31 /// Nothing inside, blurred outside.
32 kOuter,
33 /// Blurred inside, nothing outside.
34 kInner,
35 };

## ◆ MorphType

enum impeller::FilterContents::MorphType
| strong

Enumerator
kDilate |
kErode |

Definition at line 37 of file filter_contents.h.

37 { kDilate, kErode };

## Constructor & Destructor Documentation

## ◆ FilterContents()

impeller::FilterContents::FilterContents | ( |  | ) |
| default

## ◆ ~FilterContents()

impeller::FilterContents::~FilterContents | ( |  | ) |
| override default

## Member Function Documentation

## ◆ AsFilter()

const FilterContents * impeller::FilterContents::AsFilter | ( |  | ) | const
| override virtual

Cast to a filter. Returns `nullptr` if this Contents is not a filter.

Reimplemented from impeller::Contents.

Definition at line 268 of file filter_contents.cc.

268 {
269 return this;
270 }

## ◆ GetCoverage()

std::optional< Rect > impeller::FilterContents::GetCoverage | ( | const Entity & | entity | ) | const
| override virtual

Get the area of the render pass that will be affected when this contents is rendered.

During rendering, coverage coordinates count pixels from the top left corner of the framebuffer.

Returns
  The coverage rectangle. An `std::nullopt` result means that rendering this contents has no effect on the output color.

Implements impeller::Contents.

Definition at line 162 of file filter_contents.cc.

162 {
163 Entity entity_with_local_transform = entity.Clone();
164 entity_with_local_transform.SetTransform(GetTransform(entity.GetTransform()));
165
166 return GetLocalCoverage(entity_with_local_transform);
167 }

References impeller::Entity::Clone(), impeller::Entity::GetTransform(), GetTransform(), and impeller::Entity::SetTransform().

Referenced by Render(), and impeller::testing::TEST_P().

## ◆ GetEntity()

std::optional< Entity > impeller::FilterContents::GetEntity | ( | const ContentContext & | renderer,
|  | const Entity & | entity,
|  | const std::optional< Rect > & | coverage_hint
| ) |  | const

Create an Entity that renders this filter's output.

Definition at line 226 of file filter_contents.cc.

229 {
230 Entity entity_with_local_transform = entity.Clone();
231 entity_with_local_transform.SetTransform(GetTransform(entity.GetTransform()));
232
233 auto coverage = GetLocalCoverage(entity_with_local_transform);
234 if (!coverage.has_value() || coverage->IsEmpty()) {
235 return std::nullopt;
236 }
237
238 return RenderFilter(inputs_, renderer, entity_with_local_transform,
239 effect_transform_, coverage.value(), coverage_hint);
240 }

References impeller::Entity::Clone(), impeller::Entity::GetTransform(), GetTransform(), and impeller::Entity::SetTransform().

Referenced by Render(), RenderToSnapshot(), and impeller::testing::TEST_P().

## ◆ GetLocalTransform()

Matrix impeller::FilterContents::GetLocalTransform | ( | const Matrix & | parent_transform | ) | const
| virtual

Reimplemented in impeller::LocalMatrixFilterContents.

Definition at line 272 of file filter_contents.cc.

272 {
273 return Matrix();
274 }

Referenced by GetTransform().

## ◆ GetSourceCoverage()

std::optional< Rect > impeller::FilterContents::GetSourceCoverage | ( | const Matrix & | effect_transform,
|  | const Rect & | output_limit
| ) |  | const

Determines the coverage of source pixels that will be needed to produce results for the specified |output_limit| under the specified |effect_transform|. This is essentially a reverse of the |GetCoverage| method computing a source coverage from an intended |output_limit| coverage.

Both the |output_limit| and the return value are in the transformed coordinate space, and so do not need to be transformed or inverse transformed by the |effect_transform| but individual parameters on the filter might be in the untransformed space and should be transformed by the |effect_transform| before applying them to the coverages.

The method computes a result such that if the filter is applied to a set of pixels filling the computed source coverage, it should produce an output that covers the entire specified |output_limit|.

This is useful for subpass rendering scenarios where a filter will be applied to the output of the subpass and we need to determine how large of a render target to allocate in order to collect all pixels that might affect the supplied output coverage limit. While we might end up clipping the rendering of the subpass to its destination, we want to avoid clipping out any pixels that contribute to the output limit via the filtering operation.

Returns
  The coverage bounds in the transformed space of any source pixel that may be needed to produce output for the indicated filter that covers the indicated |output_limit|.

Definition at line 204 of file filter_contents.cc.

206 {
207 auto filter_input_coverage =
208 GetFilterSourceCoverage(effect_transform_, output_limit);
209
210 if (!filter_input_coverage.has_value()) {
211 return std::nullopt;
212 }
213
214 std::optional<Rect> inputs_coverage;
215 for (const auto& input : inputs_) {
216 auto input_coverage = input->GetSourceCoverage(
217 effect_transform, filter_input_coverage.value());
218 if (!input_coverage.has_value()) {
219 return std::nullopt;
220 }
221 inputs_coverage = Rect::Union(inputs_coverage, input_coverage.value());
222 }
223 return inputs_coverage;
224 }

References impeller::TRect< Scalar >::Union().

## ◆ GetTransform()

Matrix impeller::FilterContents::GetTransform | ( | const Matrix & | parent_transform | ) | const

Definition at line 276 of file filter_contents.cc.

276 {
277 return parent_transform * GetLocalTransform(parent_transform);
278 }

References GetLocalTransform().

Referenced by GetCoverage(), and GetEntity().

## ◆ IsLeaf()

bool impeller::FilterContents::IsLeaf | ( |  | ) | const

Returns `true` if this filter does not have any `FilterInput` children.

Definition at line 288 of file filter_contents.cc.

288 {
289 for (auto& input : inputs_) {
290 if (!input->IsLeaf()) {
291 return false;
292 }
293 }
294 return true;
295 }

Referenced by SetLeafInputs().

## ◆ IsTranslationOnly()

bool impeller::FilterContents::IsTranslationOnly | ( |  | ) | const
| virtual

Returns true if this filter graph doesn't perform any basis transforms to the filtered content. For example: Rotating, scaling, and skewing are all basis transforms, but translating is not.

This is useful for determining whether a filtered object's space is compatible enough with the parent pass space to perform certain subpass clipping optimizations.

Reimplemented in impeller::MatrixFilterContents.

Definition at line 279 of file filter_contents.cc.

279 {
280 for (auto& input : inputs_) {
281 if (!input->IsTranslationOnly()) {
282 return false;
283 }
284 }
285 return true;
286 }

Referenced by impeller::MatrixFilterContents::IsTranslationOnly().

## ◆ MakeBorderMaskBlur()

std::shared_ptr< FilterContents > impeller::FilterContents::MakeBorderMaskBlur | ( | FilterInput::Ref | input,
|  | Sigma | sigma_x,
|  | Sigma | sigma_y,
|  | BlurStyle | blur_style = `BlurStyle::kNormal`
| ) |  |
| static

Definition at line 49 of file filter_contents.cc.

53 {
54 auto filter = std::make_shared<BorderMaskBlurFilterContents>();
55 filter->SetInputs({std::move(input)});
56 filter->SetSigma(sigma_x, sigma_y);
57 filter->SetBlurStyle(blur_style);
58 return filter;
59 }

Referenced by impeller::Paint::MaskBlurDescriptor::CreateMaskBlur(), and impeller::testing::TEST_P().

## ◆ MakeDirectionalMorphology()

std::shared_ptr< FilterContents > impeller::FilterContents::MakeDirectionalMorphology | ( | FilterInput::Ref | input,
|  | Radius | radius,
|  | Vector2 | direction,
|  | MorphType | morph_type
| ) |  |
| static

Definition at line 61 of file filter_contents.cc.

65 {
66 auto filter = std::make_shared<DirectionalMorphologyFilterContents>();
67 filter->SetInputs({std::move(input)});
68 filter->SetRadius(radius);
69 filter->SetDirection(direction);
70 filter->SetMorphType(morph_type);
71 return filter;
72 }

Referenced by MakeMorphology().

## ◆ MakeGaussianBlur()

std::shared_ptr< FilterContents > impeller::FilterContents::MakeGaussianBlur | ( | const FilterInput::Ref & | input,
|  | Sigma | sigma_x,
|  | Sigma | sigma_y,
|  | Entity::TileMode | tile_mode = `Entity::TileMode::kDecal`,
|  | FilterContents::BlurStyle | mask_blur_style = `BlurStyle::kNormal`,
|  | const std::shared_ptr< Geometry > & | mask_geometry = `nullptr`
| ) |  |
| static

Creates a gaussian blur that operates in 2 dimensions. See also: `MakeDirectionalGaussianBlur`

Definition at line 36 of file filter_contents.cc.

42 {
43 auto blur = std::make_shared<GaussianBlurFilterContents>(
44 sigma_x.sigma, sigma_y.sigma, tile_mode, mask_blur_style, mask_geometry);
45 blur->SetInputs({input});
46 return blur;
47 }

References impeller::Sigma::sigma.

Referenced by impeller::Paint::MaskBlurDescriptor::CreateMaskBlur(), impeller::testing::TEST_P(), and impeller::BlurImageFilter::WrapInput().

## ◆ MakeLocalMatrixFilter()

std::shared_ptr< FilterContents > impeller::FilterContents::MakeLocalMatrixFilter | ( | FilterInput::Ref | input,
|  | const Matrix & | matrix
| ) |  |
| static

Definition at line 97 of file filter_contents.cc.

99 {
100 auto filter = std::make_shared<LocalMatrixFilterContents>();
101 filter->SetInputs({std::move(input)});
102 filter->SetMatrix(matrix);
103 return filter;
104 }

Referenced by impeller::LocalMatrixImageFilter::WrapInput().

## ◆ MakeMatrixFilter()

std::shared_ptr< FilterContents > impeller::FilterContents::MakeMatrixFilter | ( | FilterInput::Ref | input,
|  | const Matrix & | matrix,
|  | const SamplerDescriptor & | desc
| ) |  |
| static

Definition at line 86 of file filter_contents.cc.

89 {
90 auto filter = std::make_shared<MatrixFilterContents>();
91 filter->SetInputs({std::move(input)});
92 filter->SetMatrix(matrix);
93 filter->SetSamplerDescriptor(desc);
94 return filter;
95 }

Referenced by impeller::testing::TEST(), and impeller::MatrixImageFilter::WrapInput().

## ◆ MakeMorphology()

std::shared_ptr< FilterContents > impeller::FilterContents::MakeMorphology | ( | FilterInput::Ref | input,
|  | Radius | radius_x,
|  | Radius | radius_y,
|  | MorphType | morph_type
| ) |  |
| static

Definition at line 74 of file filter_contents.cc.

78 {
79 auto x_morphology = MakeDirectionalMorphology(std::move(input), radius_x,
80 Point(1, 0), morph_type);
81 auto y_morphology = MakeDirectionalMorphology(
82 FilterInput::Make(x_morphology), radius_y, Point(0, 1), morph_type);
83 return y_morphology;
84 }

References impeller::FilterInput::Make(), and MakeDirectionalMorphology().

Referenced by impeller::testing::TEST_P(), impeller::DilateImageFilter::WrapInput(), and impeller::ErodeImageFilter::WrapInput().

## ◆ MakeYUVToRGBFilter()

std::shared_ptr< FilterContents > impeller::FilterContents::MakeYUVToRGBFilter | ( | std::shared_ptr< Texture > | y_texture,
|  | std::shared_ptr< Texture > | uv_texture,
|  | YUVColorSpace | yuv_color_space
| ) |  |
| static

Definition at line 106 of file filter_contents.cc.

109 {
110 auto filter = std::make_shared<impeller::YUVToRGBFilterContents>();
111 filter->SetInputs({impeller::FilterInput::Make(y_texture),
112 impeller::FilterInput::Make(uv_texture)});
113 filter->SetYUVColorSpace(yuv_color_space);
114 return filter;
115 }

References impeller::FilterInput::Make().

Referenced by impeller::DlImageImpeller::MakeFromYUVTextures(), and impeller::testing::TEST_P().

## ◆ PopulateGlyphAtlas()

void impeller::FilterContents::PopulateGlyphAtlas | ( | const std::shared_ptr< LazyGlyphAtlas > & | lazy_glyph_atlas,
|  | Scalar | scale
| ) |  |
| override virtual

Add any text data to the specified lazy atlas. The scale parameter must be used again later when drawing the text.

Reimplemented from impeller::Contents.

Definition at line 169 of file filter_contents.cc.

171 {
172 for (auto& input : inputs_) {
173 input->PopulateGlyphAtlas(lazy_glyph_atlas, scale);
174 }
175 }

References scale.

## ◆ Render()

bool impeller::FilterContents::Render | ( | const ContentContext & | renderer,
|  | const Entity & | entity,
|  | RenderPass & | pass
| ) |  | const
| override virtual

Implements impeller::Contents.

Definition at line 133 of file filter_contents.cc.

135 {
136 auto filter_coverage = GetCoverage(entity);
137 if (!filter_coverage.has_value()) {
138 return true;
139 }
140
141 // Run the filter.
142
143 auto maybe_entity = GetEntity(renderer, entity, GetCoverageHint());
144 if (!maybe_entity.has_value()) {
145 return true;
146 }
147 maybe_entity->SetClipDepth(entity.GetClipDepth());
148 return maybe_entity->Render(renderer, pass);
149 }

References impeller::Entity::GetClipDepth(), GetCoverage(), impeller::Contents::GetCoverageHint(), and GetEntity().

## ◆ RenderToSnapshot()

std::optional< Snapshot > impeller::FilterContents::RenderToSnapshot | ( | const ContentContext & | renderer,
|  | const Entity & | entity,
|  | std::optional< Rect > | coverage_limit = `std::nullopt`,
|  | const std::optional< SamplerDescriptor > & | sampler_descriptor = `std::nullopt`,
|  | bool | msaa_enabled = `true`,
|  | int32_t | mip_count = `1`,
|  | const std::string & | label = `"Filter Snapshot"`
| ) |  | const
| override virtual

Render this contents to a snapshot, respecting the entity's transform, path, clip depth, and blend mode. The result texture size is always the size of `GetCoverage(entity)`.

Reimplemented from impeller::Contents.

Definition at line 242 of file filter_contents.cc.

249 {
250 // Resolve the render instruction (entity) from the filter and render it to a
251 // snapshot.
252 if (std::optional<Entity> result =
253 GetEntity(renderer, entity, coverage_limit);
254 result.has_value()) {
255 return result->GetContents()->RenderToSnapshot(
256 renderer, // renderer
257 result.value(), // entity
258 coverage_limit, // coverage_limit
259 std::nullopt, // sampler_descriptor
260 true, // msaa_enabled
261 /*mip_count=*/mip_count,
262 label); // label
263 }
264
265 return std::nullopt;
266 }

References GetEntity().

## ◆ SetEffectTransform()

void impeller::FilterContents::SetEffectTransform | ( | const Matrix & | effect_transform | ) |

Sets the transform which gets appended to the effect of this filter. Note that this is in addition to the entity's transform.

This is useful for subpass rendering scenarios where it's difficult to encode the current transform of the layer into the Entity being rendered.

Definition at line 125 of file filter_contents.cc.

125 {
126 effect_transform_ = effect_transform;
127
128 for (auto& input : inputs_) {
129 input->SetEffectTransform(effect_transform);
130 }
131 }

Referenced by impeller::testing::TEST_P().

## ◆ SetInputs()

void impeller::FilterContents::SetInputs | ( | FilterInput::Vector | inputs | ) |

The input texture sources for this filter. Each input's emitted texture is expected to have premultiplied alpha colors.

The number of required or optional textures depends on the particular filter's implementation.

Definition at line 121 of file filter_contents.cc.

121 {
122 inputs_ = std::move(inputs);
123 }

Referenced by impeller::testing::TEST_P().

## ◆ SetLeafInputs()

void impeller::FilterContents::SetLeafInputs | ( | const FilterInput::Vector & | inputs | ) |

Replaces the set of all leaf `FilterContents` with a new set of `FilterInput`s.

See also
  `FilterContents::IsLeaf`

Definition at line 297 of file filter_contents.cc.

297 {
298 if (IsLeaf()) {
299 inputs_ = inputs;
300 return;
301 }
302 for (auto& input : inputs_) {
303 input->SetLeafInputs(inputs);
304 }
305 }

References IsLeaf().

## ◆ SetRenderingMode()

void impeller::FilterContents::SetRenderingMode | ( | Entity::RenderingMode | rendering_mode | ) |
| virtual

Marks this filter chain as applying in a subpass scenario.

        Subpasses render in screenspace, and this setting informs filters
        that the current transform matrix of the entity is not stored
        in the Entity transform matrix. Instead, the effect transform
        is used in this case.

Reimplemented in impeller::MatrixFilterContents.

Definition at line 307 of file filter_contents.cc.

307 {
308 for (auto& input : inputs_) {
309 input->SetRenderingMode(rendering_mode);
310 }
311 }

Referenced by impeller::MatrixFilterContents::SetRenderingMode().

## Member Data Documentation

## ◆ kBlurFilterRequiredMipCount

const int32_t impeller::FilterContents::kBlurFilterRequiredMipCount
| static

Initial value:
=
GaussianBlurFilterContents::kBlurFilterRequiredMipCount

Definition at line 24 of file filter_contents.h.

The documentation for this class was generated from the following files:

- impeller/entity/contents/filters/filter_contents.h
- impeller/entity/contents/filters/filter_contents.cc

impeller::FilterContents::IsLeaf
bool IsLeaf() const
Returns true if this filter does not have any FilterInput children.
Definition: filter_contents.cc:288
impeller::FilterInput::Make
static FilterInput::Ref Make(Variant input, bool msaa_enabled=true)
Definition: filter_input.cc:19
impeller::FilterContents::GetTransform
Matrix GetTransform(const Matrix &parent_transform) const
Definition: filter_contents.cc:276
impeller::Contents::GetCoverageHint
const std::optional< Rect > & GetCoverageHint() const
Definition: contents.cc:173
impeller::Point
TPoint< Scalar > Point
Definition: point.h:322
impeller::FilterContents::MakeDirectionalMorphology
static std::shared_ptr< FilterContents > MakeDirectionalMorphology(FilterInput::Ref input, Radius radius, Vector2 direction, MorphType morph_type)
Definition: filter_contents.cc:61
impeller::FilterContents::GetCoverage
std::optional< Rect > GetCoverage(const Entity &entity) const override
Get the area of the render pass that will be affected when this contents is rendered.
Definition: filter_contents.cc:162
impeller::FilterContents::GetEntity
std::optional< Entity > GetEntity(const ContentContext &renderer, const Entity &entity, const std::optional< Rect > &coverage_hint) const
Create an Entity that renders this filter's output.
Definition: filter_contents.cc:226
scale
const Scalar scale
Definition: stroke_path_geometry.cc:308
impeller::FilterContents::GetLocalTransform
virtual Matrix GetLocalTransform(const Matrix &parent_transform) const
Definition: filter_contents.cc:272
impeller::TRect< Scalar >::Union
constexpr TRect Union(const TRect &o) const
Definition: rect.h:504
impeller::GaussianBlurFilterContents::kBlurFilterRequiredMipCount
static const int32_t kBlurFilterRequiredMipCount
Definition: gaussian_blur_filter_contents.h:50