# Copyright 2013 The Flutter Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("//flutter/common/config.gni")
import("//flutter/testing/testing.gni")

declare_args() {
  impeller_debug =
      flutter_runtime_mode == "debug" || flutter_runtime_mode == "profile"

  # Whether the Metal backend is enabled.
  impeller_enable_metal = (is_mac || is_ios) && target_os != "fuchsia"

  # Whether the OpenGLES backend is enabled.
  impeller_enable_opengles =
      (is_linux || is_win || is_android || is_mac || is_qnx || is_wasm ||
       enable_unittests) && target_os != "fuchsia"

  # Whether the Vulkan backend is enabled.
  impeller_enable_vulkan =
      (is_linux || is_win || is_android || is_mac || is_qnx ||
       enable_unittests) && target_os != "fuchsia"
}

# Arguments that are combinations of other arguments by default but which can
# be overridden by the user.

declare_args() {
  # Wether to build and include the validation layers.
  impeller_enable_vulkan_validation_layers =
      impeller_enable_vulkan && flutter_runtime_mode == "debug" &&
      target_cpu == "arm64"

  # Whether Impeller supports rendering on the platform.
  impeller_supports_rendering =
      impeller_enable_metal || impeller_enable_opengles ||
      impeller_enable_vulkan

  impeller_enable_compute = impeller_enable_vulkan || impeller_enable_metal
}