# Copyright 2019 The Dawn Authors
#
# 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
#
#     http://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("../../scripts/dawn_overrides_with_defaults.gni")

import("//build_overrides/build.gni")
import("${dawn_root}/scripts/dawn_features.gni")

# Use Chromium's dcheck_always_on when available so that we respect it when
# running tests on the GPU builders
if (build_with_chromium) {
  import("//build/config/dcheck_always_on.gni")
} else {
  dcheck_always_on = false
}

if (build_with_chromium) {
  import("//build/config/sanitizers/sanitizers.gni")
} else {
  use_fuzzing_engine = false
}

###############################################################################
# Common dawn configs
###############################################################################

config("dawn_public_include_dirs") {
  include_dirs = [
    "${target_gen_dir}/../../src/include",
    "${dawn_root}/src/include",
  ]
}

config("dawn_internal") {
  include_dirs = [
    "${target_gen_dir}/../../src",
    "${dawn_root}/src",
  ]

  defines = []
  if (dawn_always_assert || dcheck_always_on || is_debug ||
      use_fuzzing_engine) {
    defines += [ "DAWN_ENABLE_ASSERTS" ]
  }

  if (use_fuzzing_engine) {
    # Does a hard abort when an assertion fails so that fuzzers catch and parse the failure.
    defines += [ "DAWN_ABORT_ON_ASSERT" ]
  }

  if (dawn_enable_d3d12) {
    defines += [ "DAWN_ENABLE_BACKEND_D3D12" ]
  }
  if (dawn_enable_metal) {
    defines += [ "DAWN_ENABLE_BACKEND_METAL" ]
  }
  if (dawn_enable_null) {
    defines += [ "DAWN_ENABLE_BACKEND_NULL" ]
  }
  if (dawn_enable_opengl) {
    defines += [ "DAWN_ENABLE_BACKEND_OPENGL" ]
  }
  if (dawn_enable_vulkan) {
    defines += [ "DAWN_ENABLE_BACKEND_VULKAN" ]
  }

  if (dawn_enable_wgsl) {
    defines += [ "DAWN_ENABLE_WGSL" ]
  }

  if (dawn_use_x11) {
    defines += [ "DAWN_USE_X11" ]
  }

  if (dawn_enable_error_injection) {
    defines += [ "DAWN_ENABLE_ERROR_INJECTION" ]
  }

  # Only internal Dawn targets can use this config, this means only targets in
  # this BUILD.gn file and related subdirs.
  visibility = [ "../*" ]

  cflags = []

  # Enable more warnings that were found when using Dawn in other projects
  if (is_clang) {
    cflags += [
      "-Wconditional-uninitialized",
      "-Wcstring-format-directive",
      "-Wc++11-narrowing",
      "-Wdeprecated-copy",
      "-Wdeprecated-copy-dtor",
      "-Wduplicate-enum",
      "-Wextra-semi-stmt",
      "-Wimplicit-fallthrough",
      "-Winconsistent-missing-destructor-override",
      "-Winvalid-offsetof",
      "-Wmissing-field-initializers",
      "-Wnon-c-typedef-for-linkage",
      "-Wpessimizing-move",
      "-Wrange-loop-analysis",
      "-Wreturn-std-move-in-c++11",
      "-Wshadow-field",
      "-Wstrict-prototypes",
      "-Wtautological-unsigned-zero-compare",
    ]

    # Allow comparison against type limits that might be tautological on 32bit
    # or 64bit systems. Without this the following produces an error on 64bit:
    #
    #   if (myUint64 > std::numeric_limits<size_t>::max()) {...}
    cflags += [ "-Wno-tautological-type-limit-compare" ]

    if (is_win) {
      cflags += [
        # clang-cl doesn't know -pedantic, pass it explicitly to the clang driver
        "/clang:-pedantic",

        # Allow the use of __uuidof()
        "-Wno-language-extension-token",
      ]
    } else {
      cflags += [ "-pedantic" ]
    }
  }

  if (!is_clang && is_win) {
    # Dawn extends wgpu enums with internal enums.
    # MSVC considers these invalid switch values. crbug.com/dawn/397.
    cflags += [ "/wd4063" ]
  }
}

###############################################################################
# Common dawn library
###############################################################################

# This GN file is discovered by all Chromium builds, but common doesn't support
# all of Chromium's OSes so we explicitly make the target visible only on
# systems we know Dawn is able to compile on.
if (is_win || is_linux || is_chromeos || is_mac || is_fuchsia || is_android) {
  static_library("common") {
    sources = [
      "Assert.cpp",
      "Assert.h",
      "BitSetIterator.h",
      "Compiler.h",
      "Constants.h",
      "DynamicLib.cpp",
      "DynamicLib.h",
      "GPUInfo.cpp",
      "GPUInfo.h",
      "HashUtils.h",
      "LinkedList.h",
      "Log.cpp",
      "Log.h",
      "Math.cpp",
      "Math.h",
      "NSRef.h",
      "PlacementAllocated.h",
      "Platform.h",
      "RefBase.h",
      "RefCounted.cpp",
      "RefCounted.h",
      "Result.cpp",
      "Result.h",
      "SerialMap.h",
      "SerialQueue.h",
      "SerialStorage.h",
      "SlabAllocator.cpp",
      "SlabAllocator.h",
      "StackContainer.h",
      "SwapChainUtils.h",
      "SystemUtils.cpp",
      "SystemUtils.h",
      "TypedInteger.h",
      "UnderlyingType.h",
      "ityp_array.h",
      "ityp_bitset.h",
      "ityp_span.h",
      "ityp_stack_vec.h",
      "ityp_vector.h",
      "vulkan_platform.h",
      "windows_with_undefs.h",
      "xlib_with_undefs.h",
    ]

    public_configs = [ ":dawn_internal" ]
    deps = [ "${dawn_root}/src/dawn:dawn_headers" ]
    if (dawn_enable_vulkan) {
      public_deps = [ "${dawn_root}/third_party/khronos:vulkan_headers" ]
    }
    if (is_android) {
      libs = [ "log" ]
    }
  }
}