| Flutter Impeller |

Public Member Functions | Static Public Member Functions | List of all members
impeller::TextureContents Class Referencefinal

`#include <texture_contents.h>`

Inheritance diagram for impeller::TextureContents:

## Public Member Functions
| TextureContents ()
| ~TextureContents () override
void | SetLabel (std::string_view label)
void | SetDestinationRect (Rect rect)
void | SetTexture (std::shared_ptr< Texture > texture)
std::shared_ptr< Texture > | GetTexture () const
void | SetSamplerDescriptor (const SamplerDescriptor &desc)
const SamplerDescriptor & | GetSamplerDescriptor () const
void | SetSourceRect (const Rect &source_rect)
const Rect & | GetSourceRect () const
void | SetStrictSourceRect (bool strict)
bool | GetStrictSourceRect () const
void | SetOpacity (Scalar opacity)
Scalar | GetOpacity () const
void | SetStencilEnabled (bool enabled)
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, const SnapshotOptions &options) 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...
bool | Render (const ContentContext &renderer, const Entity &entity, RenderPass &pass) const override
void | SetInheritedOpacity (Scalar opacity) override
| Inherit the provided opacity. More...
void | SetDeferApplyingOpacity (bool defer_applying_opacity)
void | SetNeedsRasterizationForRuntimeEffects (bool value)
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 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 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< TextureContents > | MakeRect (Rect destination)
Static Public Member Functions inherited from impeller::Contents
static std::shared_ptr< Contents > | MakeAnonymous (RenderProc render_proc, CoverageProc coverage_proc)

## Additional Inherited Members
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)>

## Detailed Description

Represents the contents of a texture to be rendered.

This class encapsulates a texture along with parameters defining how it should be drawn, such as the source rectangle within the texture, the destination rectangle on the render target, opacity, and sampler settings. It's used by the rendering system to draw textured quads.

See also
  `TiledTextureContents` for a tiled version.

Definition at line 25 of file texture_contents.h.

## Constructor & Destructor Documentation

## ◆ TextureContents()

impeller::TextureContents::TextureContents | ( |  | ) |
| default

## ◆ ~TextureContents()

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

## Member Function Documentation

## ◆ GetCoverage()

std::optional< Rect > impeller::TextureContents::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 66 of file texture_contents.cc.

66 {
67 if (GetOpacity() == 0) {
68 return std::nullopt;
69 }
70 return destination_rect_.TransformBounds(entity.GetTransform());
71 };
impeller::TextureContents::GetOpacity
Scalar GetOpacity() const
Definition: texture_contents.cc:62
impeller::TRect::TransformBounds
constexpr TRect TransformBounds(const Matrix &transform) const
Creates a new bounding box that contains this transformed rectangle.
Definition: rect.h:472

References GetOpacity(), impeller::Entity::GetTransform(), and impeller::TRect< T >::TransformBounds().

## ◆ GetOpacity()

Scalar impeller::TextureContents::GetOpacity | ( |  | ) | const

Definition at line 62 of file texture_contents.cc.

62 {
63 return opacity_ * inherited_opacity_;
64 }

Referenced by GetCoverage(), Render(), and RenderToSnapshot().

## ◆ GetSamplerDescriptor()

const SamplerDescriptor & impeller::TextureContents::GetSamplerDescriptor | ( |  | ) | const

Definition at line 250 of file texture_contents.cc.

250 {
251 return sampler_descriptor_;
252 }

## ◆ GetSourceRect()

const Rect & impeller::TextureContents::GetSourceRect | ( |  | ) | const

Definition at line 234 of file texture_contents.cc.

234 {
235 return source_rect_;
236 }

## ◆ GetStrictSourceRect()

bool impeller::TextureContents::GetStrictSourceRect | ( |  | ) | const

Definition at line 242 of file texture_contents.cc.

242 {
243 return strict_source_rect_enabled_;
244 }

## ◆ GetTexture()

std::shared_ptr< Texture > impeller::TextureContents::GetTexture | ( |  | ) | const

Definition at line 46 of file texture_contents.cc.

46 {
47 return texture_;
48 }

## ◆ MakeRect()

std::shared_ptr< TextureContents > impeller::TextureContents::MakeRect | ( | Rect | destination | ) |
| static

A common case factory that marks the texture contents as having a destination rectangle.

In this situation, a subpass can be avoided when image filters are applied.

Parameters

  destination | The destination rectangle in the Entity's local coordinate space.

Definition at line 28 of file texture_contents.cc.

28 {
29 auto contents = std::make_shared<TextureContents>();
30 contents->destination_rect_ = destination;
31 return contents;
32 }

Referenced by impeller::Canvas::DrawImageRect(), impeller::Entity::FromSnapshot(), impeller::Canvas::SaveLayer(), and impeller::testing::TEST_P().

## ◆ Render()

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

Implements impeller::Contents.

Definition at line 105 of file texture_contents.cc.

107 {
108 using VS = TextureFillVertexShader;
109 using FS = TextureFillFragmentShader;
110 using FSStrict = TextureFillStrictSrcFragmentShader;
111
112 if (destination_rect_.IsEmpty() || source_rect_.IsEmpty() ||
113 texture_ == nullptr || texture_->GetSize().IsEmpty()) {
114 return true; // Nothing to render.
115 }
116
117 #if defined(IMPELLER_ENABLE_OPENGLES) && !defined(FML_OS_EMSCRIPTEN)
118 using FSExternal = TiledTextureFillExternalFragmentShader;
119 bool is_external_texture =
120 texture_->GetTextureDescriptor().type == TextureType::kTextureExternalOES;
121 #endif // IMPELLER_ENABLE_OPENGLES
122
123 auto texture_coords =
124 Rect::MakeSize(texture_->GetSize()).Project(source_rect_);
125 auto& data_host_buffer = renderer.GetTransientsDataBuffer();
126
127 std::array<VS::PerVertexData, 4> vertices = {
128 VS::PerVertexData{destination_rect_.GetLeftTop(),
129 texture_coords.GetLeftTop()},
130 VS::PerVertexData{destination_rect_.GetRightTop(),
131 texture_coords.GetRightTop()},
132 VS::PerVertexData{destination_rect_.GetLeftBottom(),
133 texture_coords.GetLeftBottom()},
134 VS::PerVertexData{destination_rect_.GetRightBottom(),
135 texture_coords.GetRightBottom()},
136 };
137 auto vertex_buffer = CreateVertexBuffer(vertices, data_host_buffer);
138
139 VS::FrameInfo frame_info;
140 frame_info.mvp = entity.GetShaderTransform(pass);
141 frame_info.texture_sampler_y_coord_scale = texture_->GetYCoordScale();
142
143 #ifdef IMPELLER_DEBUG
144 if (label_.empty()) {
145 pass.SetCommandLabel("Texture Fill");
146 } else {
147 pass.SetCommandLabel("Texture Fill: " + label_);
148 }
149 #endif // IMPELLER_DEBUG
150
151 auto pipeline_options = OptionsFromPassAndEntity(pass, entity);
152 if (!stencil_enabled_) {
153 pipeline_options.stencil_mode = ContentContextOptions::StencilMode::kIgnore;
154 }
155 pipeline_options.primitive_type = PrimitiveType::kTriangleStrip;
156
157 pipeline_options.depth_write_enabled =
158 stencil_enabled_ && pipeline_options.blend_mode == BlendMode::kSrc;
159
160 #if defined(IMPELLER_ENABLE_OPENGLES) && !defined(FML_OS_EMSCRIPTEN)
161 if (is_external_texture) {
162 pass.SetPipeline(
163 renderer.GetTiledTextureExternalPipeline(pipeline_options));
164 } else {
165 pass.SetPipeline(
166 strict_source_rect_enabled_
167 ? renderer.GetTextureStrictSrcPipeline(pipeline_options)
168 : renderer.GetTexturePipeline(pipeline_options));
169 }
170 #else
171 pass.SetPipeline(strict_source_rect_enabled_
172 ? renderer.GetTextureStrictSrcPipeline(pipeline_options)
173 : renderer.GetTexturePipeline(pipeline_options));
174 #endif // IMPELLER_ENABLE_OPENGLES
175
176 pass.SetVertexBuffer(vertex_buffer);
177 VS::BindFrameInfo(pass, data_host_buffer.EmplaceUniform(frame_info));
178
179 if (strict_source_rect_enabled_) {
180 // For a strict source rect, shrink the texture coordinate range by half a
181 // texel to ensure that linear filtering does not sample anything outside
182 // the source rect bounds.
183 auto strict_texture_coords =
184 Rect::MakeSize(texture_->GetSize()).Project(source_rect_.Expand(-0.5));
185
186 FSStrict::FragInfo frag_info;
187 frag_info.source_rect = Vector4(strict_texture_coords.GetLTRB());
188 frag_info.alpha = GetOpacity();
189 FSStrict::BindFragInfo(pass, data_host_buffer.EmplaceUniform((frag_info)));
190 FSStrict::BindTextureSampler(
191 pass, texture_,
192 renderer.GetContext()->GetSamplerLibrary()->GetSampler(
193 sampler_descriptor_));
194 #if defined(IMPELLER_ENABLE_OPENGLES) && !defined(FML_OS_EMSCRIPTEN)
195 } else if (is_external_texture) {
196 FSExternal::FragInfo frag_info;
197 frag_info.x_tile_mode =
198 static_cast<Scalar>(sampler_descriptor_.width_address_mode);
199 frag_info.y_tile_mode =
200 static_cast<Scalar>(sampler_descriptor_.height_address_mode);
201 frag_info.alpha = GetOpacity();
202 FSExternal::BindFragInfo(pass, data_host_buffer.EmplaceUniform(frag_info));
203
204 SamplerDescriptor sampler_desc;
205 // OES_EGL_image_external states that only CLAMP_TO_EDGE is valid, so
206 // we emulate all other tile modes here by remapping the texture
207 // coordinates.
208 sampler_desc.width_address_mode = SamplerAddressMode::kClampToEdge;
209 sampler_desc.height_address_mode = SamplerAddressMode::kClampToEdge;
210 sampler_desc.min_filter = sampler_descriptor_.min_filter;
211 sampler_desc.mag_filter = sampler_descriptor_.mag_filter;
212 sampler_desc.mip_filter = MipFilter::kBase;
213
214 FSExternal::BindSAMPLEREXTERNALOESTextureSampler(
215 pass, texture_,
216 renderer.GetContext()->GetSamplerLibrary()->GetSampler(sampler_desc));
217 #endif // IMPELLER_ENABLE_OPENGLES
218 } else {
219 FS::FragInfo frag_info;
220 frag_info.alpha = GetOpacity();
221 FS::BindFragInfo(pass, data_host_buffer.EmplaceUniform((frag_info)));
222 FS::BindTextureSampler(
223 pass, texture_,
224 renderer.GetContext()->GetSamplerLibrary()->GetSampler(
225 sampler_descriptor_));
226 }
227 return pass.Draw().ok();
228 }
impeller::PrimitiveType::kTriangleStrip
@ kTriangleStrip
impeller::Scalar
float Scalar
Definition: scalar.h:19
impeller::SamplerAddressMode::kClampToEdge
@ kClampToEdge
impeller::FS
LinePipeline::FragmentShader FS
Definition: line_contents.cc:14
impeller::CreateVertexBuffer
VertexBuffer CreateVertexBuffer(std::array< VertexType, size > input, HostBuffer &data_host_buffer)
Create an index-less vertex buffer from a fixed size array.
Definition: vertex_buffer_builder.h:24
impeller::MipFilter::kBase
@ kBase
The texture is sampled as if it only had a single mipmap level.
impeller::TextureType::kTextureExternalOES
@ kTextureExternalOES
impeller::BlendMode::kSrc
@ kSrc
impeller::VS
LinePipeline::VertexShader VS
Definition: line_contents.cc:13
impeller::OptionsFromPassAndEntity
ContentContextOptions OptionsFromPassAndEntity(const RenderPass &pass, const Entity &entity)
Definition: contents.cc:34
impeller::ContentContextOptions::StencilMode::kIgnore
@ kIgnore
Turn the stencil test off. Used when drawing without stencil-then-cover.
impeller::SamplerDescriptor::width_address_mode
SamplerAddressMode width_address_mode
Definition: sampler_descriptor.h:19
impeller::SamplerDescriptor::height_address_mode
SamplerAddressMode height_address_mode
Definition: sampler_descriptor.h:20
impeller::SamplerDescriptor::mag_filter
MinMagFilter mag_filter
Definition: sampler_descriptor.h:16
impeller::SamplerDescriptor::min_filter
MinMagFilter min_filter
Definition: sampler_descriptor.h:15
impeller::TRect::Expand
constexpr TRect< T > Expand(T left, T top, T right, T bottom) const
Returns a rectangle with expanded edges. Negative expansion results in shrinking.
Definition: rect.h:618
impeller::TRect::Project
constexpr TRect< T > Project(TRect< T > source) const
Returns a new rectangle that represents the projection of the source rectangle onto this rectangle....
Definition: rect.h:669
impeller::TRect::IsEmpty
constexpr bool IsEmpty() const
Returns true if either of the width or height are 0, negative, or NaN.
Definition: rect.h:297
impeller::TRect::GetLeftBottom
constexpr TPoint< T > GetLeftBottom() const
Definition: rect.h:367
impeller::TRect::GetRightTop
constexpr TPoint< T > GetRightTop() const
Definition: rect.h:363
impeller::TRect< Scalar >::MakeSize
constexpr static TRect MakeSize(const TSize< U > &size)
Definition: rect.h:150
impeller::TRect::GetRightBottom
constexpr TPoint< T > GetRightBottom() const
Definition: rect.h:371
impeller::TRect::GetLeftTop
constexpr TPoint< T > GetLeftTop() const
Definition: rect.h:359

References impeller::CreateVertexBuffer(), impeller::RenderPass::Draw(), impeller::TRect< T >::Expand(), impeller::ContentContext::GetContext(), impeller::TRect< T >::GetLeftBottom(), impeller::TRect< T >::GetLeftTop(), GetOpacity(), impeller::TRect< T >::GetRightBottom(), impeller::TRect< T >::GetRightTop(), impeller::Entity::GetShaderTransform(), impeller::ContentContext::GetTexturePipeline(), impeller::ContentContext::GetTextureStrictSrcPipeline(), impeller::ContentContext::GetTransientsDataBuffer(), impeller::SamplerDescriptor::height_address_mode, impeller::TRect< T >::IsEmpty(), impeller::kBase, impeller::kClampToEdge, impeller::ContentContextOptions::kIgnore, impeller::kSrc, impeller::kTextureExternalOES, impeller::kTriangleStrip, impeller::SamplerDescriptor::mag_filter, impeller::TRect< Scalar >::MakeSize(), impeller::SamplerDescriptor::min_filter, impeller::SamplerDescriptor::mip_filter, impeller::OptionsFromPassAndEntity(), impeller::TRect< T >::Project(), impeller::RenderPass::SetCommandLabel(), impeller::RenderPass::SetPipeline(), impeller::RenderPass::SetVertexBuffer(), and impeller::SamplerDescriptor::width_address_mode.

## ◆ RenderToSnapshot()

std::optional< Snapshot > impeller::TextureContents::RenderToSnapshot | ( | const ContentContext & | renderer,
|  | const Entity & | entity,
|  | const SnapshotOptions & | options
| ) |  | 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 73 of file texture_contents.cc.

76 {
77 // Passthrough textures that have simple rectangle paths and complete source
78 // rects.
79 auto bounds = destination_rect_;
80 auto opacity = GetOpacity();
81 if (source_rect_ == Rect::MakeSize(texture_->GetSize()) &&
82 (opacity >= 1 - kEhCloseEnough || defer_applying_opacity_)) {
83 auto scale = Vector2(bounds.GetSize() / Size(texture_->GetSize()));
84 return Snapshot{.texture = texture_,
85 .transform = entity.GetTransform() *
86 Matrix::MakeTranslation(bounds.GetOrigin()) *
87 Matrix::MakeScale(scale),
88 .sampler_descriptor = options.sampler_descriptor.value_or(
89 sampler_descriptor_),
90 .opacity = opacity,
91 .needs_rasterization_for_runtime_effects =
92 snapshots_need_rasterization_for_runtime_effects_};
93 }
94 return Contents::RenderToSnapshot(
95 renderer, entity,
96 {.coverage_limit = std::nullopt,
97 .sampler_descriptor =
98 options.sampler_descriptor.value_or(sampler_descriptor_),
99 .msaa_enabled = true,
100 .mip_count = options.mip_count,
101 .label = options.label,
102 .coverage_expansion = options.coverage_expansion});
103 }
impeller::Contents::RenderToSnapshot
virtual std::optional< Snapshot > RenderToSnapshot(const ContentContext &renderer, const Entity &entity, const SnapshotOptions &options) const
Render this contents to a snapshot, respecting the entity's transform, path, clip depth,...
Definition: contents.cc:56
impeller::Vector2
Point Vector2
Definition: point.h:429
impeller::kEhCloseEnough
constexpr float kEhCloseEnough
Definition: constants.h:57
impeller::Size
TSize< Scalar > Size
Definition: size.h:159
impeller::Matrix::MakeTranslation
static constexpr Matrix MakeTranslation(const Vector3 &t)
Definition: matrix.h:95
impeller::Matrix::MakeScale
static constexpr Matrix MakeScale(const Vector3 &s)
Definition: matrix.h:104

References impeller::Contents::SnapshotOptions::coverage_expansion, GetOpacity(), impeller::Entity::GetTransform(), impeller::kEhCloseEnough, impeller::Contents::SnapshotOptions::label, impeller::Matrix::MakeScale(), impeller::TRect< Scalar >::MakeSize(), impeller::Matrix::MakeTranslation(), impeller::Contents::SnapshotOptions::mip_count, impeller::Contents::RenderToSnapshot(), impeller::Contents::SnapshotOptions::sampler_descriptor, and impeller::Snapshot::texture.

## ◆ SetDeferApplyingOpacity()

void impeller::TextureContents::SetDeferApplyingOpacity | ( | bool | defer_applying_opacity | ) |

Sets whether applying the opacity should be deferred.

When true, the opacity value (`GetOpacity()`) might not be applied directly during rendering operations like `RenderToSnapshot`. Instead, the opacity might be stored in the resulting `Snapshot` to be applied later when the snapshot is drawn. This is typically used as an optimization when the texture covers its destination rectangle completely and has near-full opacity, allowing the original texture to be used directly in the snapshot.

Parameters

  defer_applying_opacity | True to defer applying opacity, false to apply it during rendering.

Definition at line 254 of file texture_contents.cc.

254 {
255 defer_applying_opacity_ = defer_applying_opacity;
256 }

## ◆ SetDestinationRect()

void impeller::TextureContents::SetDestinationRect | ( | Rect | rect | ) |

Sets the destination rectangle within the current render target where the texture will be drawn.

The texture, potentially clipped by the `source_rect_`, will be mapped to this rectangle. The coordinates are in the local coordinate space of the Entity.

Parameters

  rect | The destination rectangle in the Entity's local coordinate space.

Definition at line 38 of file texture_contents.cc.

38 {
39 destination_rect_ = rect;
40 }

## ◆ SetInheritedOpacity()

void impeller::TextureContents::SetInheritedOpacity | ( | Scalar | opacity | ) |
| override virtual

Inherit the provided opacity.

       Use of this method is invalid if CanAcceptOpacity returns false.

Reimplemented from impeller::Contents.

Definition at line 58 of file texture_contents.cc.

58 {
59 inherited_opacity_ = opacity;
60 }

## ◆ SetLabel()

void impeller::TextureContents::SetLabel | ( | std::string_view | label | ) |

Sets a debug label for this contents object.

This label is used for debugging purposes, for example, in graphics debuggers or logs.

Parameters

  label | The debug label string.

Definition at line 34 of file texture_contents.cc.

34 {
35 label_ = label;
36 }

## ◆ SetNeedsRasterizationForRuntimeEffects()

void impeller::TextureContents::SetNeedsRasterizationForRuntimeEffects | ( | bool | value | ) |

See also
  Snapshot::needs_rasterization_for_runtime_effects

Definition at line 258 of file texture_contents.cc.

258 {
259 snapshots_need_rasterization_for_runtime_effects_ = value;
260 }
value
int32_t value
Definition: dl_golden_unittests.cc:459

References value.

## ◆ SetOpacity()

void impeller::TextureContents::SetOpacity | ( | Scalar | opacity | ) |

Definition at line 50 of file texture_contents.cc.

50 {
51 opacity_ = opacity;
52 }

## ◆ SetSamplerDescriptor()

void impeller::TextureContents::SetSamplerDescriptor | ( | const SamplerDescriptor & | desc | ) |

Definition at line 246 of file texture_contents.cc.

246 {
247 sampler_descriptor_ = desc;
248 }

## ◆ SetSourceRect()

void impeller::TextureContents::SetSourceRect | ( | const Rect & | source_rect | ) |

Sets the source rectangle within the texture to sample from.

This rectangle defines the portion of the texture that will be mapped to the `destination_rect_`. The coordinates are in the coordinate space of the texture (texels), with the top-left corner being (0, 0).

Parameters

  source_rect | The rectangle defining the area of the texture to use.

Definition at line 230 of file texture_contents.cc.

230 {
231 source_rect_ = source_rect;
232 }

## ◆ SetStencilEnabled()

void impeller::TextureContents::SetStencilEnabled | ( | bool | enabled | ) |

Definition at line 54 of file texture_contents.cc.

54 {
55 stencil_enabled_ = enabled;
56 }

## ◆ SetStrictSourceRect()

void impeller::TextureContents::SetStrictSourceRect | ( | bool | strict | ) |

Sets whether strict source rect sampling should be used.

When enabled, the texture coordinates are adjusted slightly (typically by half a texel) to ensure that linear filtering does not sample pixels outside the specified `source_rect_`. This is useful for preventing edge artifacts when rendering sub-sections of a texture atlas.

Parameters

  strict | True to enable strict source rect sampling, false otherwise.

Definition at line 238 of file texture_contents.cc.

238 {
239 strict_source_rect_enabled_ = strict;
240 }

## ◆ SetTexture()

void impeller::TextureContents::SetTexture | ( | std::shared_ptr< Texture > | texture | ) |

Definition at line 42 of file texture_contents.cc.

42 {
43 texture_ = std::move(texture);
44 }

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

- impeller/entity/contents/texture_contents.h
- impeller/entity/contents/texture_contents.cc