#include <filter_contents.h>
Public Types | |
enum class | BlurStyle { kNormal , kSolid , kOuter , kInner } |
enum class | MorphType { kDilate , kErode } |
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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... | |
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, std::string_view 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... | |
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 void | SetRenderingMode (Entity::RenderingMode rendering_mode) |
Marks this filter chain as applying in a subpass scenario. More... | |
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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 Matrix &transform) 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... | |
std::optional< Size > | GetColorSourceSize () const |
Return the color source's intrinsic size, if available. More... | |
void | SetColorSourceSize (Size size) |
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 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 std::shared_ptr< FilterContents > | MakeRuntimeEffect (FilterInput::Ref input, std::shared_ptr< RuntimeStage > runtime_stage, std::shared_ptr< std::vector< uint8_t >> uniforms, std::vector< RuntimeEffectContents::TextureInput > texture_inputs) |
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static std::shared_ptr< Contents > | MakeAnonymous (RenderProc render_proc, CoverageProc coverage_proc) |
Static Public Attributes | |
static const int32_t | kBlurFilterRequiredMipCount |
Definition at line 24 of file filter_contents.h.
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kNormal | Blurred inside and outside. |
kSolid | Solid inside, blurred outside. |
kOuter | Nothing inside, blurred outside. |
kInner | Blurred inside, nothing outside. |
Definition at line 28 of file filter_contents.h.
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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.
std::nullopt
result means that rendering this contents has no effect on the output color. Implements impeller::Contents.
Definition at line 176 of file filter_contents.cc.
References impeller::Entity::Clone(), impeller::Entity::GetTransform(), GetTransform(), and impeller::Entity::SetTransform().
Referenced by Render(), and impeller::testing::TEST_P().
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 232 of file filter_contents.cc.
References impeller::Entity::Clone(), impeller::Entity::GetTransform(), GetTransform(), and impeller::Entity::SetTransform().
Referenced by Render(), RenderToSnapshot(), and impeller::testing::TEST_P().
Reimplemented in impeller::LocalMatrixFilterContents.
Definition at line 280 of file filter_contents.cc.
Referenced by GetTransform().
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.
Definition at line 210 of file filter_contents.cc.
References impeller::TRect< Scalar >::Union().
Definition at line 284 of file filter_contents.cc.
References GetLocalTransform().
Referenced by GetCoverage(), and GetEntity().
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Creates a gaussian blur that operates in 2 dimensions. See also: MakeDirectionalGaussianBlur
Definition at line 37 of file filter_contents.cc.
References impeller::Sigma::sigma.
Referenced by impeller::testing::TEST_P(), and impeller::WrapInput().
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Definition at line 87 of file filter_contents.cc.
Referenced by impeller::testing::TEST(), and impeller::WrapInput().
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Definition at line 75 of file filter_contents.cc.
References impeller::FilterInput::Make(), and MakeDirectionalMorphology().
Referenced by impeller::testing::TEST_P(), and impeller::WrapInput().
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Definition at line 107 of file filter_contents.cc.
References impeller::FilterInput::Make().
Referenced by impeller::DlImageImpeller::MakeFromYUVTextures(), and impeller::testing::TEST_P().
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Implements impeller::Contents.
Definition at line 147 of file filter_contents.cc.
References impeller::Entity::GetClipDepth(), GetCoverage(), impeller::Contents::GetCoverageHint(), and GetEntity().
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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)
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Reimplemented from impeller::Contents.
Definition at line 253 of file filter_contents.cc.
References GetEntity().
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 139 of file filter_contents.cc.
Referenced by impeller::testing::TEST_P().
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 135 of file filter_contents.cc.
Referenced by impeller::testing::TEST_P().
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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 288 of file filter_contents.cc.
Referenced by impeller::MatrixFilterContents::SetRenderingMode().
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Definition at line 26 of file filter_contents.h.