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cb8eb801a4
Currently, all Flutter threads are managed by the engine itself. This works for all threads except the platform thread. On this thread, the engine cannot see the underlying event multiplexing mechanism. Using the new task runner interfaces, the engine can relinquish the task of setting up the event multiplexing mechanism and instead have the embedder provide one for it during setup. This scheme is only wired up for the platform thread. But, the eventual goal is to expose this message loop interoperability for all threads.
124 lines
3.7 KiB
C++
124 lines
3.7 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "flutter/shell/platform/embedder/tests/embedder_config_builder.h"
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namespace shell {
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namespace testing {
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EmbedderConfigBuilder::EmbedderConfigBuilder(
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EmbedderContext& context,
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InitializationPreference preference)
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: context_(context) {
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project_args_.struct_size = sizeof(project_args_);
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software_renderer_config_.struct_size = sizeof(FlutterSoftwareRendererConfig);
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custom_task_runners_.struct_size = sizeof(FlutterCustomTaskRunners);
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software_renderer_config_.surface_present_callback =
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[](void*, const void*, size_t, size_t) { return true; };
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if (preference == InitializationPreference::kInitialize) {
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SetSoftwareRendererConfig();
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SetAssetsPath();
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SetSnapshots();
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SetIsolateCreateCallbackHook();
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}
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}
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EmbedderConfigBuilder::~EmbedderConfigBuilder() = default;
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void EmbedderConfigBuilder::SetSoftwareRendererConfig() {
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renderer_config_.type = FlutterRendererType::kSoftware;
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renderer_config_.software = software_renderer_config_;
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}
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void EmbedderConfigBuilder::SetAssetsPath() {
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project_args_.assets_path = context_.GetAssetsPath().c_str();
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}
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void EmbedderConfigBuilder::SetSnapshots() {
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if (auto mapping = context_.GetVMSnapshotData()) {
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project_args_.vm_snapshot_data = mapping->GetMapping();
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project_args_.vm_snapshot_data_size = mapping->GetSize();
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}
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if (auto mapping = context_.GetVMSnapshotInstructions()) {
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project_args_.vm_snapshot_instructions = mapping->GetMapping();
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project_args_.vm_snapshot_instructions_size = mapping->GetSize();
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}
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if (auto mapping = context_.GetIsolateSnapshotData()) {
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project_args_.isolate_snapshot_data = mapping->GetMapping();
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project_args_.isolate_snapshot_data_size = mapping->GetSize();
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}
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if (auto mapping = context_.GetIsolateSnapshotInstructions()) {
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project_args_.isolate_snapshot_instructions = mapping->GetMapping();
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project_args_.isolate_snapshot_instructions_size = mapping->GetSize();
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}
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}
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void EmbedderConfigBuilder::SetIsolateCreateCallbackHook() {
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project_args_.root_isolate_create_callback =
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EmbedderContext::GetIsolateCreateCallbackHook();
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}
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void EmbedderConfigBuilder::SetDartEntrypoint(std::string entrypoint) {
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if (entrypoint.size() == 0) {
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return;
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}
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dart_entrypoint_ = std::move(entrypoint);
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project_args_.custom_dart_entrypoint = dart_entrypoint_.c_str();
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}
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void EmbedderConfigBuilder::AddCommandLineArgument(std::string arg) {
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if (arg.size() == 0) {
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return;
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}
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command_line_arguments_.emplace_back(std::move(arg));
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}
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void EmbedderConfigBuilder::SetPlatformTaskRunner(
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const FlutterTaskRunnerDescription* runner) {
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if (runner == nullptr) {
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return;
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}
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custom_task_runners_.platform_task_runner = runner;
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project_args_.custom_task_runners = &custom_task_runners_;
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}
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UniqueEngine EmbedderConfigBuilder::LaunchEngine() {
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FlutterEngine engine = nullptr;
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std::vector<const char*> args;
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args.reserve(command_line_arguments_.size());
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for (const auto& arg : command_line_arguments_) {
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args.push_back(arg.c_str());
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}
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if (args.size() > 0) {
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project_args_.command_line_argv = args.data();
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project_args_.command_line_argc = args.size();
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} else {
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// Clear it out in case this is not the first engine launch from the
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// embedder config builder.
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project_args_.command_line_argv = nullptr;
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project_args_.command_line_argc = 0;
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}
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auto result = FlutterEngineRun(FLUTTER_ENGINE_VERSION, &renderer_config_,
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&project_args_, &context_, &engine);
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if (result != kSuccess) {
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return {};
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}
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return UniqueEngine{engine};
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}
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} // namespace testing
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} // namespace shell
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