flutter::FlutterMain Class Reference

#include <flutter_main.h>

Public Member Functions
	~FlutterMain ()
const flutter::Settings &	GetSettings () const

Static Public Member Functions
static bool	Register (JNIEnv *env)
static FlutterMain &	Get ()
static AndroidRenderingAPI	SelectedRenderingAPI (const flutter::Settings &settings)

Detailed Description

Definition at line 16 of file flutter_main.h.

Constructor & Destructor Documentation

~FlutterMain()

flutter::FlutterMain::~FlutterMain ( )

default

Member Function Documentation

Get()

FlutterMain & flutter::FlutterMain::Get ( )

static

Definition at line 58 of file flutter_main.cc.

                              {
  FML_CHECK(g_flutter_main) << "ensureInitializationComplete must have already "
                               "been called.";
  return *g_flutter_main;
}

GetSettings()

const flutter::Settings & flutter::FlutterMain::GetSettings

(

)

const

Definition at line 64 of file flutter_main.cc.

                                                      {
  return settings_;
}

Register()

bool flutter::FlutterMain::Register ( JNIEnv *  env )

static

Definition at line 209 of file flutter_main.cc.

                                      {
  static const JNINativeMethod methods[] = {
      {
          .name = "nativeInit",
          .signature = "(Landroid/content/Context;[Ljava/lang/String;Ljava/"
                       "lang/String;Ljava/lang/String;Ljava/lang/String;J)V",
          .fnPtr = reinterpret_cast<void*>(&Init),
      },
      {
          .name = "nativePrefetchDefaultFontManager",
          .signature = "()V",
          .fnPtr = reinterpret_cast<void*>(&PrefetchDefaultFontManager),
      },
  };
 
  jclass clazz = env->FindClass("io/flutter/embedding/engine/FlutterJNI");
 
  if (clazz == nullptr) {
    return false;
  }
 
  return env->RegisterNatives(clazz, methods, fml::size(methods)) == 0;
}

SelectedRenderingAPI()

AndroidRenderingAPI flutter::FlutterMain::SelectedRenderingAPI ( const flutter::Settings &  settings )

static

Definition at line 234 of file flutter_main.cc.

                                     {
  if (settings.enable_software_rendering) {
    FML_CHECK(!settings.enable_impeller)
        << "Impeller does not support software rendering. Either disable "
           "software rendering or disable impeller.";
    return AndroidRenderingAPI::kSoftware;
  }
  constexpr AndroidRenderingAPI kVulkanUnsupportedFallback =
      AndroidRenderingAPI::kSkiaOpenGLES;
 
  // Debug/Profile only functionality for testing a specific
  // backend configuration.
#ifndef FLUTTER_RELEASE
  if (settings.requested_rendering_backend == "opengles" &
      settings.enable_impeller) {
    return AndroidRenderingAPI::kImpellerOpenGLES;
  }
  if (settings.requested_rendering_backend == "vulkan" &&
      settings.enable_impeller) {
    return AndroidRenderingAPI::kImpellerVulkan;
  }
#endif
 
  if (settings.enable_impeller) {
    // Vulkan must only be used on API level 29+, as older API levels do not
    // have requisite features to support platform views.
    //
    // Even if this check returns true, Impeller may determine it cannot use
    // Vulkan for some other reason, such as a missing required extension or
    // feature.
    int api_level = android_get_device_api_level();
    if (api_level < kMinimumAndroidApiLevelForVulkan) {
      return kVulkanUnsupportedFallback;
    }
    // Determine if Vulkan is supported by creating a Vulkan context and
    // checking if it is valid.
    impeller::ScopedValidationDisable disable_validation;
    auto vulkan_backend = std::make_unique<AndroidContextVulkanImpeller>(
        /*enable_vulkan_validation=*/false,
        /*enable_vulkan_gpu_tracing=*/false,
        /*quiet=*/true);
    if (!vulkan_backend->IsValid()) {
      return kVulkanUnsupportedFallback;
    }
    return AndroidRenderingAPI::kImpellerVulkan;
  }
 
  return AndroidRenderingAPI::kSkiaOpenGLES;
}

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

• shell/platform/android/flutter_main.h
• shell/platform/android/flutter_main.cc