Flutter Impeller
scene_context.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 
9 #include "impeller/scene/shaders/skinned.vert.h"
10 #include "impeller/scene/shaders/unlit.frag.h"
11 #include "impeller/scene/shaders/unskinned.vert.h"
12 
13 namespace impeller {
14 namespace scene {
15 
17  const Capabilities& capabilities,
18  PipelineDescriptor& desc) const {
21  depth.depth_write_enabled = true;
24 
28  desc.SetStencilAttachmentDescriptors(stencil);
30 
33 
36 }
37 
38 SceneContext::SceneContext(std::shared_ptr<Context> context)
39  : context_(std::move(context)) {
40  if (!context_ || !context_->IsValid()) {
41  return;
42  }
43 
44  auto unskinned_variant =
45  MakePipelineVariants<UnskinnedVertexShader, UnlitFragmentShader>(
46  *context_);
47  if (!unskinned_variant) {
48  FML_LOG(ERROR) << "Could not create unskinned pipeline variant.";
49  return;
50  }
52  std::move(unskinned_variant);
53 
54  auto skinned_variant =
55  MakePipelineVariants<SkinnedVertexShader, UnlitFragmentShader>(*context_);
56  if (!skinned_variant) {
57  FML_LOG(ERROR) << "Could not create skinned pipeline variant.";
58  return;
59  }
61  std::move(skinned_variant);
62 
63  {
64  impeller::TextureDescriptor texture_descriptor;
66  texture_descriptor.format = PixelFormat::kR8G8B8A8UNormInt;
67  texture_descriptor.size = {1, 1};
68  texture_descriptor.mip_count = 1u;
69 
70  placeholder_texture_ =
71  context_->GetResourceAllocator()->CreateTexture(texture_descriptor);
72  placeholder_texture_->SetLabel("Placeholder Texture");
73  if (!placeholder_texture_) {
74  FML_LOG(ERROR) << "Could not create placeholder texture.";
75  return;
76  }
77 
78  uint8_t pixel[] = {0xFF, 0xFF, 0xFF, 0xFF};
79  if (!placeholder_texture_->SetContents(pixel, 4)) {
80  FML_LOG(ERROR) << "Could not set contents of placeholder texture.";
81  return;
82  }
83  }
84  host_buffer_ = HostBuffer::Create(GetContext()->GetResourceAllocator());
85  is_valid_ = true;
86 }
87 
88 SceneContext::~SceneContext() = default;
89 
90 std::shared_ptr<Pipeline<PipelineDescriptor>> SceneContext::GetPipeline(
91  PipelineKey key,
92  SceneContextOptions opts) const {
93  if (!IsValid()) {
94  return nullptr;
95  }
96  if (auto found = pipelines_.find(key); found != pipelines_.end()) {
97  return found->second->GetPipeline(*context_, opts);
98  }
99  return nullptr;
100 }
101 
102 bool SceneContext::IsValid() const {
103  return is_valid_;
104 }
105 
106 std::shared_ptr<Context> SceneContext::GetContext() const {
107  return context_;
108 }
109 
110 std::shared_ptr<Texture> SceneContext::GetPlaceholderTexture() const {
111  return placeholder_texture_;
112 }
113 
114 } // namespace scene
115 } // namespace impeller
impeller::PipelineDescriptor
Definition: pipeline_descriptor.h:24
host_buffer.h
scene_context.h
impeller::StencilAttachmentDescriptor::stencil_compare
CompareFunction stencil_compare
Definition: formats.h:598
impeller::scene::SceneContextOptions::sample_count
SampleCount sample_count
Definition: scene_context.h:20
impeller::PipelineDescriptor::SetStencilAttachmentDescriptors
PipelineDescriptor & SetStencilAttachmentDescriptors(std::optional< StencilAttachmentDescriptor > front_and_back)
Definition: pipeline_descriptor.cc:157
impeller::scene::GeometryType::kUnskinned
@ kUnskinned
impeller::scene::SceneContext::SceneContext
SceneContext(std::shared_ptr< Context > context)
Definition: scene_context.cc:38
impeller::PipelineDescriptor::SetStencilPixelFormat
PipelineDescriptor & SetStencilPixelFormat(PixelFormat format)
Definition: pipeline_descriptor.cc:145
impeller::StencilOperation::kKeep
@ kKeep
Don't modify the current stencil value.
impeller::TextureDescriptor::format
PixelFormat format
Definition: texture_descriptor.h:40
impeller::PipelineDescriptor::SetPrimitiveType
void SetPrimitiveType(PrimitiveType type)
Definition: pipeline_descriptor.cc:268
impeller::PixelFormat::kR8G8B8A8UNormInt
@ kR8G8B8A8UNormInt
formats.h
impeller::scene::SceneContextOptions::primitive_type
PrimitiveType primitive_type
Definition: scene_context.h:21
impeller::TextureDescriptor::mip_count
size_t mip_count
Definition: texture_descriptor.h:42
impeller::HostBuffer::Create
static std::shared_ptr< HostBuffer > Create(const std::shared_ptr< Allocator > &allocator)
Definition: host_buffer.cc:20
impeller::scene::SceneContext::GetPlaceholderTexture
std::shared_ptr< Texture > GetPlaceholderTexture() const
Definition: scene_context.cc:110
impeller::StorageMode::kHostVisible
@ kHostVisible
impeller::scene::SceneContext::~SceneContext
~SceneContext()
impeller::scene::SceneContext::IsValid
bool IsValid() const
Definition: scene_context.cc:102
impeller::PipelineDescriptor::SetCullMode
void SetCullMode(CullMode mode)
Definition: pipeline_descriptor.cc:252
impeller::scene::SceneContextOptions
Definition: scene_context.h:19
impeller::Capabilities
Definition: capabilities.h:15
impeller::scene::PipelineKey
Definition: pipeline_key.h:23
impeller::DepthAttachmentDescriptor::depth_write_enabled
bool depth_write_enabled
Definition: formats.h:580
impeller::CullMode::kBackFace
@ kBackFace
material.h
impeller::scene::MaterialType::kUnlit
@ kUnlit
impeller::WindingOrder::kCounterClockwise
@ kCounterClockwise
impeller::StencilAttachmentDescriptor::depth_stencil_pass
StencilOperation depth_stencil_pass
Definition: formats.h:611
impeller::CompareFunction::kAlways
@ kAlways
Comparison test passes always passes.
impeller::PipelineDescriptor::SetSampleCount
PipelineDescriptor & SetSampleCount(SampleCount samples)
Definition: pipeline_descriptor.cc:76
impeller::TextureDescriptor::size
ISize size
Definition: texture_descriptor.h:41
impeller::scene::GeometryType::kSkinned
@ kSkinned
std
Definition: comparable.h:95
impeller::scene::SceneContext::GetContext
std::shared_ptr< Context > GetContext() const
Definition: scene_context.cc:106
impeller::DepthAttachmentDescriptor
Definition: formats.h:572
impeller::StencilAttachmentDescriptor
Definition: formats.h:592
impeller::PipelineDescriptor::SetDepthPixelFormat
PipelineDescriptor & SetDepthPixelFormat(PixelFormat format)
Definition: pipeline_descriptor.cc:139
impeller::scene::SceneContext::GetPipeline
std::shared_ptr< Pipeline< PipelineDescriptor > > GetPipeline(PipelineKey key, SceneContextOptions opts) const
Definition: scene_context.cc:90
impeller::TextureDescriptor::storage_mode
StorageMode storage_mode
Definition: texture_descriptor.h:38
impeller::PipelineDescriptor::SetDepthStencilAttachmentDescriptor
PipelineDescriptor & SetDepthStencilAttachmentDescriptor(std::optional< DepthAttachmentDescriptor > desc)
Definition: pipeline_descriptor.cc:151
impeller::TextureDescriptor
A lightweight object that describes the attributes of a texture that can then used an allocator to cr...
Definition: texture_descriptor.h:37
impeller::PipelineDescriptor::SetWindingOrder
void SetWindingOrder(WindingOrder order)
Definition: pipeline_descriptor.cc:260
impeller::scene::SceneContextOptions::ApplyToPipelineDescriptor
void ApplyToPipelineDescriptor(const Capabilities &capabilities, PipelineDescriptor &desc) const
Definition: scene_context.cc:16
impeller::CompareFunction::kLess
@ kLess
Comparison test passes if new_value < current_value.
impeller
Definition: aiks_blur_unittests.cc:20
impeller::DepthAttachmentDescriptor::depth_compare
CompareFunction depth_compare
Definition: formats.h:576
impeller::Capabilities::GetDefaultDepthStencilFormat
virtual PixelFormat GetDefaultDepthStencilFormat() const =0
Returns a supported PixelFormat for textures that store both a stencil and depth component....