# Copyright 2018 The ANGLE Project Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# BUILD settings for Vulkan Validation Layers
# Validation repo is at
# https://github.com/KhronosGroup/Vulkan-ValidationLayers

import("../../gni/angle.gni")

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

import("$angle_root/third_party/vulkan-headers/vulkan_headers_script_deps.gni")

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

raw_vulkan_headers_dir =
    rebase_path("$angle_root/third_party/vulkan-headers/src", root_build_dir)

vulkan_gen_dir = "$target_gen_dir/angle/vulkan"
raw_vulkan_gen_dir = rebase_path(vulkan_gen_dir, root_build_dir)

# Vulkan helper scripts
# ---------------------

helper_script_and_deps = [
  [
    "vulkan_gen_dispatch_table_helper_h",
    "vk_dispatch_table_helper.h",
    "dispatch_table_helper_generator.py",
  ],
  [
    "vulkan_gen_enum_string_helper",
    "vk_enum_string_helper.h",
    "helper_file_generator.py",
  ],
  [
    "vulkan_gen_extension_helper",
    "vk_extension_helper.h",
    "helper_file_generator.py",
  ],
  [
    "vulkan_gen_layer_dispatch_table_h",
    "vk_layer_dispatch_table.h",
    "loader_extension_generator.py",
  ],
  [
    "vulkan_gen_object_types_h",
    "vk_object_types.h",
    "helper_file_generator.py",
  ],
  [
    "vulkan_gen_safe_struct_cpp",
    "vk_safe_struct.cpp",
    "helper_file_generator.py",
  ],
  [
    "vulkan_gen_safe_struct_h",
    "vk_safe_struct.h",
    "helper_file_generator.py",
  ],
  [
    "vulkan_gen_thread_check_helper",
    "thread_check.h",
    "threading_generator.py",
  ],
  [
    "vulkan_gen_typemap_helper",
    "vk_typemap_helper.h",
    "helper_file_generator.py",
  ],
  [
    "vulkan_gen_object_tracker_cpp",
    "object_tracker.cpp",
    "object_tracker_generator.py",
  ],
  [
    "vulkan_gen_parameter_validation_cpp",
    "parameter_validation.cpp",
    "parameter_validation_generator.py",
  ],
  [
    "vulkan_gen_unique_objects_wrappers_helper",
    "unique_objects_wrappers.h",
    "unique_objects_generator.py",
  ],
]

# Python scripts needed for codegen, copy them to a temp dir
# so that all dependencies are together
copy("python_gen_deps") {
  sources = vulkan_registry_script_files + [
              "src/layers/vk_validation_error_messages.h",
              "src/scripts/common_codegen.py",
              "src/scripts/dispatch_table_helper_generator.py",
              "src/scripts/helper_file_generator.py",
              "src/scripts/loader_extension_generator.py",
              "src/scripts/lvl_genvk.py",
              "src/scripts/object_tracker_generator.py",
              "src/scripts/parameter_validation_generator.py",
              "src/scripts/threading_generator.py",
              "src/scripts/unique_objects_generator.py",
            ]
  outputs = [
    "$vulkan_gen_dir/{{source_file_part}}",
  ]
}

foreach(script_and_dep, helper_script_and_deps) {
  target_name = script_and_dep[0]
  file = script_and_dep[1]
  dep = script_and_dep[2]
  target("action", target_name) {
    public_deps = [
      ":python_gen_deps",
    ]
    script = "$vulkan_gen_dir/lvl_genvk.py"
    inputs = [
      "$vulkan_gen_dir/$dep",
      "$vulkan_gen_dir/common_codegen.py",
      "$vulkan_gen_dir/vk_validation_error_messages.h",
    ]
    outputs = [
      "$vulkan_gen_dir/$file",
    ]
    args = [
      "-o",
      raw_vulkan_gen_dir,
      "-registry",
      "$raw_vulkan_headers_dir/registry/vk.xml",
      "-scripts",
      "$raw_vulkan_headers_dir/registry",
      "$file",
      "-quiet",
    ]
  }
}

raw_spirv_tools_dir = rebase_path("${angle_spirv_tools_dir}", root_build_dir)

spirv_git_is_present = exec_script("$angle_root/src/commit_id.py",
                                   [
                                     "check",
                                     raw_spirv_tools_dir,
                                   ],
                                   "value")

spirv_use_commit_id = spirv_git_is_present == 1

if (spirv_use_commit_id) {
  # This could be generalized to a foreach if other revisions are added.
  action("spirv_tools_external_revision_generate") {
    script = "src/scripts/external_revision_generator.py"
    inputs = [
      "//DEPS",
    ]
    outputs = [
      "$vulkan_gen_dir/spirv_tools_commit_id.h",
    ]
    args = [
      "--git_dir",
      "$raw_spirv_tools_dir",
      "-s",
      "SPIRV_TOOLS_COMMIT_ID",
      "-o",
      "$raw_vulkan_gen_dir/spirv_tools_commit_id.h",
    ]
  }
} else {
  copy("spirv_tools_external_revision_generate") {
    sources = [
      "dummy_spirv_tools_commit_id.h",
    ]
    outputs = [
      "$vulkan_gen_dir/spirv_tools_commit_id.h",
    ]
  }
}

config("vulkan_generated_files_config") {
  include_dirs = [ vulkan_gen_dir ]
}

group("vulkan_generate_helper_files") {
  public_deps = [
    ":spirv_tools_external_revision_generate",
    "$angle_root/third_party/vulkan-headers:vulkan_headers",
  ]
  public_configs = [ ":vulkan_generated_files_config" ]
  foreach(script_and_dep, helper_script_and_deps) {
    target_name = script_and_dep[0]
    public_deps += [ ":$target_name" ]
  }
}

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

# The validation layers
# ---------------------

config("vulkan_layer_config") {
  include_dirs = [ "src/layers" ]
}

core_validation_sources = [
  # This file is manually included in the layer
  # "$vulkan_gen_dir/vk_safe_struct.cpp",
  "$vulkan_gen_dir/vk_safe_struct.h",
  "src/layers/buffer_validation.cpp",
  "src/layers/buffer_validation.h",
  "src/layers/core_validation.cpp",
  "src/layers/core_validation.h",
  "src/layers/convert_to_renderpass2.cpp",
  "src/layers/descriptor_sets.cpp",
  "src/layers/descriptor_sets.h",
  "src/layers/shader_validation.cpp",
  "src/layers/shader_validation.h",
  "src/layers/xxhash.c",
  "src/layers/xxhash.h",
]

object_tracker_sources = [
  "$vulkan_gen_dir/object_tracker.cpp",
  "src/layers/object_tracker.h",
  "src/layers/object_tracker_utils.cpp",
]

parameter_validation_sources = [
  "$vulkan_gen_dir/parameter_validation.cpp",
  "src/layers/parameter_validation.h",
  "src/layers/parameter_validation_utils.cpp",
]

threading_sources = [
  "$vulkan_gen_dir/thread_check.h",
  "src/layers/threading.cpp",
  "src/layers/threading.h",
]

unique_objects_sources = [
  "$vulkan_gen_dir/unique_objects_wrappers.h",

  # This file is manually included in the layer
  # "$vulkan_gen_dir/vk_safe_struct.cpp",
  "$vulkan_gen_dir/vk_safe_struct.h",
  "src/layers/unique_objects.cpp",
  "src/layers/unique_objects.h",
]

layers = [
  [
    "core_validation",
    core_validation_sources,
    ":vulkan_core_validation_glslang",
  ],
  [
    "object_tracker",
    object_tracker_sources,
    ":vulkan_gen_object_tracker",
  ],
  [
    "parameter_validation",
    parameter_validation_sources,
    ":vulkan_gen_parameter_validation",
  ],
  [
    "threading",
    threading_sources,
    ":vulkan_gen_thread_check_helper",
  ],
  [
    "unique_objects",
    unique_objects_sources,
    ":vulkan_gen_unique_objects_wrappers_helper",
  ],
]

if (!is_android) {
  raw_vulkan_layers_dir = rebase_path("src", root_build_dir)

  action("vulkan_gen_json_files") {
    script = "$angle_root/scripts/generate_vulkan_layers_json.py"
    json_names = [
      "VkLayer_core_validation.json",
      "VkLayer_object_tracker.json",
      "VkLayer_parameter_validation.json",
      "VkLayer_standard_validation.json",
      "VkLayer_threading.json",
      "VkLayer_unique_objects.json",
    ]
    sources = [
      "../vulkan-headers/src/include/vulkan/vulkan_core.h",
    ]
    outputs = []
    foreach(json_name, json_names) {
      sources += [ "src/layers/json/$json_name.in" ]
      outputs += [ "$root_out_dir/$data_dir/$json_name" ]
    }
    args = [
             "$raw_vulkan_layers_dir/layers/json",
             rebase_path("$root_out_dir/$data_dir", root_build_dir),
           ] + rebase_path(sources, root_build_dir)

    # The layer JSON files are part of the necessary data deps.
    data = outputs
  }
}

source_set("vulkan_layer_utils") {
  sources = [
    "src/layers/vk_format_utils.cpp",
    "src/layers/vk_format_utils.h",
    "src/layers/vk_layer_config.cpp",
    "src/layers/vk_layer_config.h",
    "src/layers/vk_layer_extension_utils.cpp",
    "src/layers/vk_layer_extension_utils.h",
    "src/layers/vk_layer_utils.cpp",
    "src/layers/vk_layer_utils.h",
  ]
  public_configs = [
    "$angle_root:vulkan_config",
    ":vulkan_internal_config",
  ]
  configs -= [ "//build/config/compiler:chromium_code" ]
  configs += [ "//build/config/compiler:no_chromium_code" ]
  public_deps = [
    ":vulkan_generate_helper_files",
  ]
  configs -= vulkan_undefine_configs
}

config("vulkan_core_validation_config") {
  include_dirs = [ "${angle_glslang_dir}" ]
}

source_set("vulkan_core_validation_glslang") {
  public_deps = [
    "${angle_spirv_tools_dir}:spvtools",
    "${angle_spirv_tools_dir}:spvtools_val",
  ]
  public_configs = [ ":vulkan_core_validation_config" ]
}

config("vulkan_parameter_validation_config") {
  if (is_clang) {
    cflags_cc = [ "-Wno-unused-const-variable" ]
  }
}

# These special "clean" actions are needed to remove generated headers.
# Otherwise the cpp files will pick up the old generated files
# and the build will fail. It's a bit unfortunate but necessary.
action("vulkan_clean_parameter_gen_header") {
  script = "$angle_root/scripts/remove_file_if_exists.py"
  inputs = parameter_validation_sources
  deps = [
    ":vulkan_gen_parameter_validation_cpp",
  ]
  outputs = [
    "$vulkan_gen_dir/parameter_validation_h_is_removed",
  ]
  args = [
    "$raw_vulkan_gen_dir/parameter_validation.h",
    "$raw_vulkan_gen_dir/parameter_validation_h_is_removed",
  ]
}

action("vulkan_clean_tracker_gen_header") {
  script = "$angle_root/scripts/remove_file_if_exists.py"
  inputs = object_tracker_sources
  deps = [
    ":vulkan_gen_object_tracker_cpp",
  ]
  outputs = [
    "$vulkan_gen_dir/object_tracker_h_is_removed",
  ]
  args = [
    "$raw_vulkan_gen_dir/object_tracker.h",
    "$raw_vulkan_gen_dir/object_tracker_h_is_removed",
  ]
}

source_set("vulkan_gen_parameter_validation") {
  deps = [
    ":vulkan_clean_parameter_gen_header",
    ":vulkan_gen_parameter_validation_cpp",
  ]
  public_configs = [ ":vulkan_parameter_validation_config" ]
}

source_set("vulkan_gen_object_tracker") {
  deps = [
    ":vulkan_clean_tracker_gen_header",
    ":vulkan_gen_object_tracker_cpp",
  ]
}

foreach(layer_info, layers) {
  name = layer_info[0]
  shared_library("VkLayer_$name") {
    configs -= [ "//build/config/compiler:chromium_code" ]
    configs += [ "//build/config/compiler:no_chromium_code" ]
    configs -= vulkan_undefine_configs
    public_configs = [ ":vulkan_layer_config" ]
    deps = [
      ":vulkan_layer_utils",
    ]
    if (layer_info[2] != "") {
      deps += [ layer_info[2] ]
    }
    sources = layer_info[1]
    if (is_win) {
      sources += [ "src/layers/VkLayer_$name.def" ]
    }
    if (is_linux || is_android) {
      ldflags = [ "-Wl,-Bsymbolic,--exclude-libs,ALL" ]
    }
    if (is_android) {
      libs = [ "log" ]
      configs -= [ "//build/config/android:hide_all_but_jni_onload" ]
    }
  }
}

group("vulkan_validation_layers") {
  data_deps = []
  foreach(layer_info, layers) {
    name = layer_info[0]
    data_deps += [ ":VkLayer_$name" ]
  }
}