| Flutter Impeller |

pipeline_gles.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 "impeller/renderer/backend/gles/pipeline_gles.h"
6
7 namespace impeller {
8
9 PipelineGLES::PipelineGLES(ReactorGLES::Ref reactor,
10 std::weak_ptr<PipelineLibrary> library,
11 const PipelineDescriptor& desc)
12 : Pipeline(std::move(library), desc),
13 reactor_(std::move(reactor)),
14 handle_(reactor_ ? reactor_->CreateHandle(HandleType::kProgram)
15 : HandleGLES::DeadHandle()),
16 is_valid_(!handle_.IsDead()) {
17 if (is_valid_) {
18 reactor_->SetDebugLabel(handle_, GetDescriptor().GetLabel());
19 }
20 }
21
22 // |Pipeline|
23 PipelineGLES::~PipelineGLES() {
24 if (!handle_.IsDead()) {
25 reactor_->CollectHandle(handle_);
26 }
27 }
28
29 // |Pipeline|
30 bool PipelineGLES::IsValid() const {
31 return is_valid_;
32 }
33
34 const HandleGLES& PipelineGLES::GetProgramHandle() const {
35 return handle_;
36 }
37
38 const BufferBindingsGLES* PipelineGLES::GetBufferBindings() const {
39 return buffer_bindings_.get();
40 }
41
42 bool PipelineGLES::BuildVertexDescriptor(const ProcTableGLES& gl,
43 GLuint program) {
44 if (buffer_bindings_) {
45 return false;
46 }
47 auto vtx_desc = std::make_unique<BufferBindingsGLES>();
48 if (!vtx_desc->RegisterVertexStageInput(
49 gl, GetDescriptor().GetVertexDescriptor()->GetStageInputs(),
50 GetDescriptor().GetVertexDescriptor()->GetStageLayouts())) {
51 return false;
52 }
53 if (!vtx_desc->ReadUniformsBindings(gl, program)) {
54 return false;
55 }
56 buffer_bindings_ = std::move(vtx_desc);
57 return true;
58 }
59
60 [[nodiscard]] bool PipelineGLES::BindProgram() const {
61 if (handle_.IsDead()) {
62 return false;
63 }
64 auto handle = reactor_->GetGLHandle(handle_);
65 if (!handle.has_value()) {
66 return false;
67 }
68 reactor_->GetProcTable().UseProgram(handle.value());
69 return true;
70 }
71
72 [[nodiscard]] bool PipelineGLES::UnbindProgram() const {
73 if (reactor_) {
74 reactor_->GetProcTable().UseProgram(0u);
75 }
76 return true;
77 }
78
79 } // namespace impeller
impeller::ReactorGLES::Ref
std::shared_ptr< ReactorGLES > Ref
Definition: reactor_gles.h:31
impeller::HandleType
HandleType
Definition: handle_gles.h:21
impeller::BufferBindingsGLES
Sets up stage bindings for single draw call in the OpenGLES backend.
Definition: buffer_bindings_gles.h:22
impeller::HandleGLES
Definition: handle_gles.h:34
impeller::ProcTableGLES
Definition: proc_table_gles.h:188
impeller::HandleType::kProgram
@ kProgram
pipeline_gles.h
std
Definition: comparable.h:98
impeller
Definition: aiks_context.cc:10