Flutter Impeller
vertices_contents.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 
5 #include "vertices_contents.h"
6 
11 #include "impeller/entity/position_color.vert.h"
12 #include "impeller/entity/vertices.frag.h"
15 
16 namespace impeller {
17 
19 
21 
22 std::optional<Rect> VerticesContents::GetCoverage(const Entity& entity) const {
23  return geometry_->GetCoverage(entity.GetTransform());
24 };
25 
26 void VerticesContents::SetGeometry(std::shared_ptr<VerticesGeometry> geometry) {
27  geometry_ = std::move(geometry);
28 }
29 
30 void VerticesContents::SetSourceContents(std::shared_ptr<Contents> contents) {
31  src_contents_ = std::move(contents);
32 }
33 
34 std::shared_ptr<VerticesGeometry> VerticesContents::GetGeometry() const {
35  return geometry_;
36 }
37 
39  alpha_ = alpha;
40 }
41 
43  blend_mode_ = blend_mode;
44 }
45 
46 const std::shared_ptr<Contents>& VerticesContents::GetSourceContents() const {
47  return src_contents_;
48 }
49 
51  const Entity& entity,
52  RenderPass& pass) const {
53  if (blend_mode_ == BlendMode::kClear) {
54  return true;
55  }
56  std::shared_ptr<Contents> src_contents = src_contents_;
57  src_contents->SetCoverageHint(GetCoverageHint());
58  if (geometry_->HasTextureCoordinates()) {
59  auto contents = std::make_shared<VerticesUVContents>(*this);
60  contents->SetCoverageHint(GetCoverageHint());
61  if (!geometry_->HasVertexColors()) {
62  contents->SetAlpha(alpha_);
63  return contents->Render(renderer, entity, pass);
64  }
65  src_contents = contents;
66  }
67 
68  auto dst_contents = std::make_shared<VerticesColorContents>(*this);
69  dst_contents->SetCoverageHint(GetCoverageHint());
70 
71  std::shared_ptr<Contents> contents;
72  if (blend_mode_ == BlendMode::kDestination) {
73  dst_contents->SetAlpha(alpha_);
74  contents = dst_contents;
75  } else {
76  auto color_filter_contents = ColorFilterContents::MakeBlend(
77  blend_mode_, {FilterInput::Make(dst_contents, false),
78  FilterInput::Make(src_contents, false)});
79  color_filter_contents->SetAlpha(alpha_);
80  color_filter_contents->SetCoverageHint(GetCoverageHint());
81  contents = color_filter_contents;
82  }
83 
84  FML_DCHECK(contents->GetCoverageHint() == GetCoverageHint());
85  return contents->Render(renderer, entity, pass);
86 }
87 
88 //------------------------------------------------------
89 // VerticesUVContents
90 
92  : parent_(parent) {}
93 
95 
96 std::optional<Rect> VerticesUVContents::GetCoverage(
97  const Entity& entity) const {
98  return parent_.GetCoverage(entity);
99 }
100 
102  alpha_ = alpha;
103 }
104 
106  const Entity& entity,
107  RenderPass& pass) const {
110 
111  auto src_contents = parent_.GetSourceContents();
112 
113  auto snapshot =
114  src_contents->RenderToSnapshot(renderer, // renderer
115  entity, // entity
116  GetCoverageHint(), // coverage_limit
117  std::nullopt, // sampler_descriptor
118  true, // msaa_enabled
119  /*mip_count=*/1,
120  "VerticesUVContents Snapshot"); // label
121  if (!snapshot.has_value()) {
122  return false;
123  }
124 
125  pass.SetCommandLabel("VerticesUV");
126  auto& host_buffer = renderer.GetTransientsBuffer();
127  const std::shared_ptr<Geometry>& geometry = parent_.GetGeometry();
128 
129  auto coverage = src_contents->GetCoverage(Entity{});
130  if (!coverage.has_value()) {
131  return false;
132  }
133  auto geometry_result = geometry->GetPositionUVBuffer(
134  coverage.value(), Matrix(), renderer, entity, pass);
135  auto opts = OptionsFromPassAndEntity(pass, entity);
136  opts.primitive_type = geometry_result.type;
137  pass.SetPipeline(renderer.GetTexturePipeline(opts));
138  pass.SetStencilReference(entity.GetClipDepth());
139  pass.SetVertexBuffer(std::move(geometry_result.vertex_buffer));
140 
141  VS::FrameInfo frame_info;
142  frame_info.mvp = geometry_result.transform;
143  frame_info.texture_sampler_y_coord_scale =
144  snapshot->texture->GetYCoordScale();
145  frame_info.alpha = alpha_ * snapshot->opacity;
146  VS::BindFrameInfo(pass, host_buffer.EmplaceUniform(frame_info));
147 
148  FS::BindTextureSampler(pass, snapshot->texture,
149  renderer.GetContext()->GetSamplerLibrary()->GetSampler(
150  snapshot->sampler_descriptor));
151 
152  return pass.Draw().ok();
153 }
154 
155 //------------------------------------------------------
156 // VerticesColorContents
157 
159  : parent_(parent) {}
160 
162 
164  const Entity& entity) const {
165  return parent_.GetCoverage(entity);
166 }
167 
169  alpha_ = alpha;
170 }
171 
173  const Entity& entity,
174  RenderPass& pass) const {
177 
178  pass.SetCommandLabel("VerticesColors");
179  auto& host_buffer = renderer.GetTransientsBuffer();
180  const std::shared_ptr<VerticesGeometry>& geometry = parent_.GetGeometry();
181 
182  auto geometry_result =
183  geometry->GetPositionColorBuffer(renderer, entity, pass);
184  auto opts = OptionsFromPassAndEntity(pass, entity);
185  opts.primitive_type = geometry_result.type;
186  pass.SetPipeline(renderer.GetGeometryColorPipeline(opts));
187  pass.SetStencilReference(entity.GetClipDepth());
188  pass.SetVertexBuffer(std::move(geometry_result.vertex_buffer));
189 
190  VS::FrameInfo frame_info;
191  frame_info.mvp = geometry_result.transform;
192  VS::BindFrameInfo(pass, host_buffer.EmplaceUniform(frame_info));
193 
194  FS::FragInfo frag_info;
195  frag_info.alpha = alpha_;
196  FS::BindFragInfo(pass, host_buffer.EmplaceUniform(frag_info));
197 
198  return pass.Draw().ok();
199 }
200 
201 } // namespace impeller
impeller::ContentContext::GetTexturePipeline
std::shared_ptr< Pipeline< PipelineDescriptor > > GetTexturePipeline(ContentContextOptions opts) const
Definition: content_context.h:485
impeller::VerticesContents::Render
bool Render(const ContentContext &renderer, const Entity &entity, RenderPass &pass) const override
Definition: vertices_contents.cc:50
impeller::VerticesColorContents::~VerticesColorContents
~VerticesColorContents() override
Definition: vertices_contents.cc:161
impeller::VerticesContents::SetBlendMode
void SetBlendMode(BlendMode blend_mode)
Definition: vertices_contents.cc:42
impeller::VerticesUVContents::SetAlpha
void SetAlpha(Scalar alpha)
Definition: vertices_contents.cc:101
impeller::VerticesColorContents::Render
bool Render(const ContentContext &renderer, const Entity &entity, RenderPass &pass) const override
Definition: vertices_contents.cc:172
impeller::Scalar
float Scalar
Definition: scalar.h:18
impeller::Entity::GetTransform
const Matrix & GetTransform() const
Get the global transform matrix for this Entity.
Definition: entity.cc:49
impeller::BlendMode
BlendMode
Definition: color.h:59
impeller::VerticesUVContents::Render
bool Render(const ContentContext &renderer, const Entity &entity, RenderPass &pass) const override
Definition: vertices_contents.cc:105
impeller::FilterInput::Make
static FilterInput::Ref Make(Variant input, bool msaa_enabled=true)
Definition: filter_input.cc:19
impeller::VerticesColorContents::VerticesColorContents
VerticesColorContents(const VerticesContents &parent)
Definition: vertices_contents.cc:158
impeller::BlendMode::kDestination
@ kDestination
impeller::RenderPipelineT::FragmentShader
FragmentShader_ FragmentShader
Definition: pipeline.h:94
impeller::RenderPass::SetVertexBuffer
virtual bool SetVertexBuffer(VertexBuffer buffer)
Specify the vertex and index buffer to use for this command.
Definition: render_pass.cc:123
impeller::VerticesContents::SetGeometry
void SetGeometry(std::shared_ptr< VerticesGeometry > geometry)
Definition: vertices_contents.cc:26
impeller::RenderPass::SetCommandLabel
virtual void SetCommandLabel(std::string_view label)
The debugging label to use for the command.
Definition: render_pass.cc:97
impeller::RenderPass::Draw
virtual fml::Status Draw()
Record the currently pending command.
Definition: render_pass.cc:127
vertices_contents.h
impeller::VS
SolidFillVertexShader VS
Definition: stroke_path_geometry.cc:15
impeller::VerticesContents::SetAlpha
void SetAlpha(Scalar alpha)
Definition: vertices_contents.cc:38
impeller::VerticesContents
Definition: vertices_contents.h:24
impeller::Entity
Definition: entity.h:21
impeller::OptionsFromPassAndEntity
ContentContextOptions OptionsFromPassAndEntity(const RenderPass &pass, const Entity &entity)
Definition: contents.cc:37
impeller::Contents::GetCoverageHint
const std::optional< Rect > & GetCoverageHint() const
Definition: contents.cc:164
impeller::VerticesContents::~VerticesContents
~VerticesContents() override
render_pass.h
impeller::VerticesUVContents::VerticesUVContents
VerticesUVContents(const VerticesContents &parent)
Definition: vertices_contents.cc:91
impeller::BlendMode::kClear
@ kClear
impeller::ContentContext::GetContext
std::shared_ptr< Context > GetContext() const
Definition: content_context.cc:564
impeller::VerticesContents::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: vertices_contents.cc:22
geometry.h
impeller::VerticesContents::SetSourceContents
void SetSourceContents(std::shared_ptr< Contents > contents)
Definition: vertices_contents.cc:30
impeller::RenderPass::SetStencilReference
virtual void SetStencilReference(uint32_t value)
Definition: render_pass.cc:103
color_filter_contents.h
impeller::VerticesColorContents::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: vertices_contents.cc:163
vertices_geometry.h
impeller::RenderPass
Render passes encode render commands directed as one specific render target into an underlying comman...
Definition: render_pass.h:33
impeller::Entity::GetClipDepth
uint32_t GetClipDepth() const
Definition: entity.cc:105
content_context.h
impeller::VerticesContents::VerticesContents
VerticesContents()
impeller::VerticesUVContents::~VerticesUVContents
~VerticesUVContents() override
Definition: vertices_contents.cc:94
color.h
impeller::RenderPass::SetPipeline
virtual void SetPipeline(const std::shared_ptr< Pipeline< PipelineDescriptor >> &pipeline)
The pipeline to use for this command.
Definition: render_pass.cc:92
impeller::RenderPipelineT::VertexShader
VertexShader_ VertexShader
Definition: pipeline.h:93
impeller::ColorFilterContents::MakeBlend
static std::shared_ptr< ColorFilterContents > MakeBlend(BlendMode blend_mode, FilterInput::Vector inputs, std::optional< Color > foreground_color=std::nullopt)
the [inputs] are expected to be in the order of dst, src.
Definition: color_filter_contents.cc:17
impeller
Definition: aiks_blur_unittests.cc:20
impeller::VerticesContents::GetSourceContents
const std::shared_ptr< Contents > & GetSourceContents() const
Definition: vertices_contents.cc:46
impeller::VerticesContents::GetGeometry
std::shared_ptr< VerticesGeometry > GetGeometry() const
Definition: vertices_contents.cc:34
impeller::ContentContext
Definition: content_context.h:392
impeller::Matrix
A 4x4 matrix using column-major storage.
Definition: matrix.h:37
impeller::ContentContext::GetGeometryColorPipeline
std::shared_ptr< Pipeline< PipelineDescriptor > > GetGeometryColorPipeline(ContentContextOptions opts) const
Definition: content_context.h:581
impeller::VerticesColorContents::SetAlpha
void SetAlpha(Scalar alpha)
Definition: vertices_contents.cc:168
impeller::ContentContext::GetTransientsBuffer
HostBuffer & GetTransientsBuffer() const
Retrieve the currnent host buffer for transient storage.
Definition: content_context.h:833
impeller::VerticesUVContents::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: vertices_contents.cc:96