# Copyright (C) 2018-2019 The ANGLE Project Authors.
# Copyright (C) 2019 LunarG, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import("//build_overrides/vulkan_loader.gni")

# Fuchsia has non-upstream changes to the vulkan loader, so we don't want
# to build it from upstream sources.
assert(!is_fuchsia)

if (!is_android) {
  vulkan_undefine_configs = []
}
if (is_win) {
  vulkan_undefine_configs += [
    "//build/config/win:nominmax",
    "//build/config/win:unicode",
  ]
}

config("vulkan_internal_config") {
  defines = [ "VULKAN_NON_CMAKE_BUILD" ]
  if (is_clang || !is_win) {
    cflags = [ "-Wno-unused-function" ]
  }
  if (is_linux || is_mac) {
    defines += [
      "SYSCONFDIR=\"/etc\"",
      "FALLBACK_CONFIG_DIRS=\"/etc/xdg\"",
      "FALLBACK_DATA_DIRS=\"/usr/local/share:/usr/share\"",
    ]
  }
}

# Vulkan loader
# -------------

config("vulkan_loader_config") {
  include_dirs = [
    "loader/generated",
    "loader",
  ]
  defines = [
    "API_NAME=\"Vulkan\"",
    "USE_UNSAFE_FILE_SEARCH=1",
  ]

  if (is_win) {
    cflags = [ "/wd4201" ]
  }
  if (is_linux) {
    # assume secure_getenv() is available
    defines += [ "HAVE_SECURE_GETENV" ]
  }
}

if (!is_android) {
  if (vulkan_loader_shared) {
    library_type = "shared_library"
  } else {
    library_type = "static_library"
  }

  target(library_type, "libvulkan") {
    sources = [
      "loader/asm_offset.c",
      "loader/cJSON.c",
      "loader/cJSON.h",
      "loader/debug_utils.c",
      "loader/debug_utils.h",
      "loader/dev_ext_trampoline.c",
      "loader/extension_manual.c",
      "loader/extension_manual.h",
      "loader/gpa_helper.h",
      "loader/loader.c",
      "loader/loader.h",
      "loader/murmurhash.c",
      "loader/murmurhash.h",
      "loader/phys_dev_ext.c",
      "loader/trampoline.c",

      # TODO(jmadill): Use assembler where available.
      "loader/unknown_ext_chain.c",
      "loader/vk_loader_platform.h",
      "loader/wsi.c",
      "loader/wsi.h",
    ]
    if (is_win) {
      output_name = "vulkan-1"
      sources += [
        "loader/dirent_on_windows.c",
        "loader/dirent_on_windows.h",
        "loader/dxgi_loader.c",
        "loader/dxgi_loader.h",
        "loader/vulkan-1.def",
      ]
      if (!is_clang) {
        cflags = [
          "/wd4054",  # Type cast from function pointer
          "/wd4055",  # Type cast from data pointer
          "/wd4100",  # Unreferenced formal parameter
          "/wd4152",  # Nonstandard extension used (pointer conversion)
          "/wd4201",  # Nonstandard extension used: nameless struct/union
          "/wd4214",  # Nonstandard extension used: bit field types other than
                      # int
          "/wd4232",  # Nonstandard extension used: address of dllimport is not
                      # static
          "/wd4305",  # Type cast truncation
          "/wd4706",  # Assignment within conditional expression
          "/wd4996",  # Unsafe stdlib function
        ]
      }
      if (is_clang) {
        cflags = [ "-Wno-incompatible-pointer-types" ]
      }
      libs = [ "Cfgmgr32.lib" ]
    }
    if (is_mac) {
      frameworks = [ "CoreFoundation.framework" ]
    }
    public_deps = [ "$vulkan_headers_dir:vulkan_headers" ]
    configs -= [ "//build/config/compiler:chromium_code" ]
    configs += [ "//build/config/compiler:no_chromium_code" ]
    configs += [ ":vulkan_internal_config" ]
    public_configs = [ ":vulkan_loader_config" ]
    configs -= vulkan_undefine_configs
  }

  if (is_linux && vulkan_loader_shared) {
    copy("libvulkan-abi1") {
      sources = [ "${root_out_dir}/libvulkan.so" ]
      outputs = [ "${root_out_dir}/libvulkan.so.1" ]

      deps = [ ":libvulkan" ]
    }
  }
}