# Copyright 2018 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("scripts/dawn_features.gni")

import("//testing/test.gni")

###############################################################################
# Template to wrap the Dawn code generator
###############################################################################

# Template to help with invocation of the Dawn code generator, looks like this:
#
#   dawn_generator("my_target_gen") {
#     # Which generator target to output
#     target = "my_target"
#     # The list of expected outputs, generation fails if there's a mismatch
#     outputs = [
#       "MyTarget.cpp",
#       "MyTarget.h",
#     ]
#   }
#
# Using the generated files is done like so:
#
#   shared_library("my_target") {
#     deps = [ ":my_target_gen "]
#     sources = get_target_outputs(":my_target_gen")
#   }
#
template("dawn_generator") {
  # The base arguments for the generator: from this dawn.json, generate this
  # target using templates in this directory.
  generator_args = [
    rebase_path("dawn.json", root_build_dir),
    "--template-dir",
    rebase_path("generator/templates", root_build_dir),
    "--targets",
    invoker.target,
  ]

  # Use the Jinja2 version pulled from the DEPS file. We do it so we don't
  # have version problems, and users don't have to install Jinja2.
  jinja2_python_path = rebase_path("${dawn_jinja2_dir}/..")
  generator_args += [
    "--extra-python-path",
    jinja2_python_path,
  ]

  # For build parallelism GN wants to know the exact inputs and outputs of
  # action targets like we use for our code generator. We avoid asking the
  # generator about its inputs by using the "depfile" feature of GN/Ninja.
  #
  # A ninja limitation is that the depfile is a subset of Makefile that can
  # contain a single target, so we output a single "JSON-tarball" instead.
  json_tarball = "${target_gen_dir}/${target_name}.json_tarball"
  json_tarball_depfile = "${json_tarball}.d"

  generator_args += [
    "--output-json-tarball",
    rebase_path(json_tarball, root_build_dir),
    "--depfile",
    rebase_path(json_tarball_depfile, root_build_dir),
  ]

  # After the JSON tarball is created we need an action target to extract it
  # with a list of its outputs. The invoker provided a list of expected
  # outputs. To make sure the list is in sync between the generator and the
  # build files, we write it to a file and ask the generator to assert it is
  # correct.
  expected_outputs_file = "${target_gen_dir}/${target_name}.expected_outputs"
  write_file(expected_outputs_file, invoker.outputs)

  generator_args += [
    "--expected-outputs-file",
    rebase_path(expected_outputs_file, root_build_dir),
  ]

  # The code generator invocation that will write the JSON tarball, check the
  # outputs are what's expected and write a depfile for Ninja.
  action("${target_name}_json_tarball") {
    script = "generator/main.py"
    outputs = [
      json_tarball,
    ]
    depfile = json_tarball_depfile
    args = generator_args
  }

  # Extract the JSON tarball into the target_gen_dir
  action("${target_name}") {
    script = "generator/extract_json.py"
    args = [
      rebase_path(json_tarball, root_build_dir),
      rebase_path(target_gen_dir, root_build_dir),
    ]

    deps = [
      ":${target_name}_json_tarball",
    ]
    inputs = [
      json_tarball,
    ]

    # The expected output list is relative to the target_gen_dir but action
    # target outputs are from the root dir so we need to rebase them.
    outputs = []
    foreach(source, invoker.outputs) {
      outputs += [ "${target_gen_dir}/${source}" ]
    }
  }
}

###############################################################################
# Common dawn libraries and configs
###############################################################################

config("libdawn_public") {
  include_dirs = [
    target_gen_dir,
    "src/include",
  ]
}

# Executable needs an rpath to find our shared libraries on OSX and Linux
config("dawn_shared_library_public") {
  if (is_mac) {
    ldflags = [
      "-rpath",
      "@executable_path/",
    ]
  }

  if (is_linux) {
    configs = [ "//build/config/gcc:rpath_for_built_shared_libraries" ]
  }
}

config("dawn_internal") {
  include_dirs = [ "src" ]

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

  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" ]
  }

  configs = [
    ":libdawn_public",
    ":dawn_shared_library_public",
  ]

  # Only internal Dawn targets can use this config, this means only targets in
  # this BUILD.gn file.
  visibility = [ ":*" ]
}

static_library("dawn_common") {
  sources = [
    "src/common/Assert.cpp",
    "src/common/Assert.h",
    "src/common/BitSetIterator.h",
    "src/common/Compiler.h",
    "src/common/DynamicLib.cpp",
    "src/common/DynamicLib.h",
    "src/common/HashUtils.h",
    "src/common/Math.cpp",
    "src/common/Math.h",
    "src/common/Platform.h",
    "src/common/Result.h",
    "src/common/Serial.h",
    "src/common/SerialQueue.h",
    "src/common/SwapChainUtils.h",
    "src/common/vulkan_platform.h",
    "src/common/windows_with_undefs.h",
  ]

  configs += [ ":dawn_internal" ]
  deps = [
    ":dawn_headers",
  ]
}

###############################################################################
# Dawn headers and libdawn.so
###############################################################################

dawn_generator("dawn_headers_gen") {
  target = "dawn_headers"
  outputs = [
    "dawn/dawncpp.h",
    "dawn/dawn.h",
    "dawn/dawncpp_traits.h",
  ]
}

source_set("dawn_headers") {
  public_configs = [ ":libdawn_public" ]
  deps = [
    ":dawn_headers_gen",
  ]

  sources = get_target_outputs(":dawn_headers_gen")
  sources += [
    "src/include/dawn/EnumClassBitmasks.h",
    "src/include/dawn/dawn_export.h",
    "src/include/dawn/dawn_wsi.h",
  ]
}

dawn_generator("libdawn_gen") {
  target = "libdawn"
  outputs = [
    "dawn/dawncpp.cpp",
    "dawn/dawn.c",
  ]
}

shared_library("libdawn") {
  public_deps = [
    ":dawn_headers",
  ]

  defines = [ "DAWN_IMPLEMENTATION" ]
  deps = [
    ":libdawn_gen",
  ]
  sources = get_target_outputs(":libdawn_gen")

  # Tell dependents where to find this shared library
  if (is_mac) {
    ldflags = [
      "-install_name",
      "@rpath/${target_name}.dylib",
    ]
  }
}

###############################################################################
# libdawn_native.so
###############################################################################

config("libdawn_native_internal") {
  configs = [ ":dawn_internal" ]
  defines = [ "DAWN_NATIVE_IMPLEMENTATION" ]

  # Suppress warnings that Metal isn't in the deployment target of Chrome
  if (is_mac) {
    cflags_objcc = [ "-Wno-unguarded-availability" ]
  }
}

dawn_generator("libdawn_native_utils_gen") {
  target = "dawn_native_utils"
  outputs = [
    "dawn_native/ProcTable.cpp",
    "dawn_native/dawn_structs_autogen.h",
    "dawn_native/dawn_structs_autogen.cpp",
    "dawn_native/ValidationUtils_autogen.h",
    "dawn_native/ValidationUtils_autogen.cpp",
  ]
}

# Public libdawn_native headers so they can be publically visible for
# dependencies of libdawn_native
source_set("libdawn_native_headers") {
  public_deps = [
    ":dawn_headers",
  ]
  sources = [
    "src/include/dawn_native/DawnNative.h",
    "src/include/dawn_native/dawn_native_export.h",

    # Include all backend's public headers so that dependencies can include
    # them even when the backends are disabled.
    "src/include/dawn_native/D3D12Backend.h",
    "src/include/dawn_native/MetalBackend.h",
    "src/include/dawn_native/NullBackend.h",
    "src/include/dawn_native/OpenGLBackend.h",
    "src/include/dawn_native/VulkanBackend.h",
  ]
}

# The meat of the compilation for libdawn_native so that we can cheaply have
# shared_library / static_library / component versions of it.
source_set("libdawn_native_sources") {
  deps = [
    ":dawn_common",
    ":libdawn_native_utils_gen",
    "${dawn_spirv_tools_dir}:spvtools_val",
    "third_party:spirv_cross",
  ]

  # Put the internal config public so that unittests can see internal headers
  public_configs = [ ":libdawn_native_internal" ]

  # Set the headers as a public dependency so they are visible to unittests
  public_deps = [
    ":libdawn_native_headers",
  ]

  libs = []

  sources = get_target_outputs(":libdawn_native_utils_gen")
  sources += [
    "src/dawn_native/BindGroup.cpp",
    "src/dawn_native/BindGroup.h",
    "src/dawn_native/BindGroupLayout.cpp",
    "src/dawn_native/BindGroupLayout.h",
    "src/dawn_native/BlendState.cpp",
    "src/dawn_native/BlendState.h",
    "src/dawn_native/Buffer.cpp",
    "src/dawn_native/Buffer.h",
    "src/dawn_native/Builder.cpp",
    "src/dawn_native/Builder.h",
    "src/dawn_native/CommandAllocator.cpp",
    "src/dawn_native/CommandAllocator.h",
    "src/dawn_native/CommandBuffer.cpp",
    "src/dawn_native/CommandBuffer.h",
    "src/dawn_native/CommandBufferStateTracker.cpp",
    "src/dawn_native/CommandBufferStateTracker.h",
    "src/dawn_native/Commands.cpp",
    "src/dawn_native/Commands.h",
    "src/dawn_native/ComputePassEncoder.cpp",
    "src/dawn_native/ComputePassEncoder.h",
    "src/dawn_native/ComputePipeline.cpp",
    "src/dawn_native/ComputePipeline.h",
    "src/dawn_native/DawnNative.cpp",
    "src/dawn_native/DepthStencilState.cpp",
    "src/dawn_native/DepthStencilState.h",
    "src/dawn_native/Device.cpp",
    "src/dawn_native/Device.h",
    "src/dawn_native/Error.cpp",
    "src/dawn_native/Error.h",
    "src/dawn_native/ErrorData.cpp",
    "src/dawn_native/ErrorData.h",
    "src/dawn_native/Forward.h",
    "src/dawn_native/InputState.cpp",
    "src/dawn_native/InputState.h",
    "src/dawn_native/ObjectBase.cpp",
    "src/dawn_native/ObjectBase.h",
    "src/dawn_native/PassResourceUsage.h",
    "src/dawn_native/PerStage.cpp",
    "src/dawn_native/PerStage.h",
    "src/dawn_native/Pipeline.cpp",
    "src/dawn_native/Pipeline.h",
    "src/dawn_native/PipelineLayout.cpp",
    "src/dawn_native/PipelineLayout.h",
    "src/dawn_native/ProgrammablePassEncoder.cpp",
    "src/dawn_native/ProgrammablePassEncoder.h",
    "src/dawn_native/Queue.cpp",
    "src/dawn_native/Queue.h",
    "src/dawn_native/RefCounted.cpp",
    "src/dawn_native/RefCounted.h",
    "src/dawn_native/RenderPassDescriptor.cpp",
    "src/dawn_native/RenderPassDescriptor.h",
    "src/dawn_native/RenderPassEncoder.cpp",
    "src/dawn_native/RenderPassEncoder.h",
    "src/dawn_native/RenderPipeline.cpp",
    "src/dawn_native/RenderPipeline.h",
    "src/dawn_native/Sampler.cpp",
    "src/dawn_native/Sampler.h",
    "src/dawn_native/ShaderModule.cpp",
    "src/dawn_native/ShaderModule.h",
    "src/dawn_native/SwapChain.cpp",
    "src/dawn_native/SwapChain.h",
    "src/dawn_native/Texture.cpp",
    "src/dawn_native/Texture.h",
    "src/dawn_native/ToBackend.h",
    "src/dawn_native/dawn_platform.h",
  ]

  if (dawn_enable_d3d12) {
    libs += [ "dxguid.lib" ]
    sources += [
      "src/dawn_native/d3d12/BindGroupD3D12.cpp",
      "src/dawn_native/d3d12/BindGroupD3D12.h",
      "src/dawn_native/d3d12/BindGroupLayoutD3D12.cpp",
      "src/dawn_native/d3d12/BindGroupLayoutD3D12.h",
      "src/dawn_native/d3d12/BlendStateD3D12.cpp",
      "src/dawn_native/d3d12/BlendStateD3D12.h",
      "src/dawn_native/d3d12/BufferD3D12.cpp",
      "src/dawn_native/d3d12/BufferD3D12.h",
      "src/dawn_native/d3d12/CommandAllocatorManager.cpp",
      "src/dawn_native/d3d12/CommandAllocatorManager.h",
      "src/dawn_native/d3d12/CommandBufferD3D12.cpp",
      "src/dawn_native/d3d12/CommandBufferD3D12.h",
      "src/dawn_native/d3d12/ComputePipelineD3D12.cpp",
      "src/dawn_native/d3d12/ComputePipelineD3D12.h",
      "src/dawn_native/d3d12/DepthStencilStateD3D12.cpp",
      "src/dawn_native/d3d12/DepthStencilStateD3D12.h",
      "src/dawn_native/d3d12/DescriptorHeapAllocator.cpp",
      "src/dawn_native/d3d12/DescriptorHeapAllocator.h",
      "src/dawn_native/d3d12/DeviceD3D12.cpp",
      "src/dawn_native/d3d12/DeviceD3D12.h",
      "src/dawn_native/d3d12/Forward.h",
      "src/dawn_native/d3d12/InputStateD3D12.cpp",
      "src/dawn_native/d3d12/InputStateD3D12.h",
      "src/dawn_native/d3d12/NativeSwapChainImplD3D12.cpp",
      "src/dawn_native/d3d12/NativeSwapChainImplD3D12.h",
      "src/dawn_native/d3d12/PipelineLayoutD3D12.cpp",
      "src/dawn_native/d3d12/PipelineLayoutD3D12.h",
      "src/dawn_native/d3d12/PlatformFunctions.cpp",
      "src/dawn_native/d3d12/PlatformFunctions.h",
      "src/dawn_native/d3d12/QueueD3D12.cpp",
      "src/dawn_native/d3d12/QueueD3D12.h",
      "src/dawn_native/d3d12/RenderPassDescriptorD3D12.cpp",
      "src/dawn_native/d3d12/RenderPassDescriptorD3D12.h",
      "src/dawn_native/d3d12/RenderPipelineD3D12.cpp",
      "src/dawn_native/d3d12/RenderPipelineD3D12.h",
      "src/dawn_native/d3d12/ResourceAllocator.cpp",
      "src/dawn_native/d3d12/ResourceAllocator.h",
      "src/dawn_native/d3d12/ResourceUploader.cpp",
      "src/dawn_native/d3d12/ResourceUploader.h",
      "src/dawn_native/d3d12/SamplerD3D12.cpp",
      "src/dawn_native/d3d12/SamplerD3D12.h",
      "src/dawn_native/d3d12/ShaderModuleD3D12.cpp",
      "src/dawn_native/d3d12/ShaderModuleD3D12.h",
      "src/dawn_native/d3d12/SwapChainD3D12.cpp",
      "src/dawn_native/d3d12/SwapChainD3D12.h",
      "src/dawn_native/d3d12/TextureCopySplitter.cpp",
      "src/dawn_native/d3d12/TextureCopySplitter.h",
      "src/dawn_native/d3d12/TextureD3D12.cpp",
      "src/dawn_native/d3d12/TextureD3D12.h",
      "src/dawn_native/d3d12/d3d12_platform.h",
    ]
  }

  if (dawn_enable_metal) {
    libs += [
      "Metal.framework",
      "Cocoa.framework",
    ]
    sources += [
      "src/dawn_native/metal/BlendStateMTL.h",
      "src/dawn_native/metal/BlendStateMTL.mm",
      "src/dawn_native/metal/BufferMTL.h",
      "src/dawn_native/metal/BufferMTL.mm",
      "src/dawn_native/metal/CommandBufferMTL.h",
      "src/dawn_native/metal/CommandBufferMTL.mm",
      "src/dawn_native/metal/ComputePipelineMTL.h",
      "src/dawn_native/metal/ComputePipelineMTL.mm",
      "src/dawn_native/metal/DepthStencilStateMTL.h",
      "src/dawn_native/metal/DepthStencilStateMTL.mm",
      "src/dawn_native/metal/DeviceMTL.h",
      "src/dawn_native/metal/DeviceMTL.mm",
      "src/dawn_native/metal/Forward.h",
      "src/dawn_native/metal/InputStateMTL.h",
      "src/dawn_native/metal/InputStateMTL.mm",
      "src/dawn_native/metal/PipelineLayoutMTL.h",
      "src/dawn_native/metal/PipelineLayoutMTL.mm",
      "src/dawn_native/metal/QueueMTL.h",
      "src/dawn_native/metal/QueueMTL.mm",
      "src/dawn_native/metal/RenderPipelineMTL.h",
      "src/dawn_native/metal/RenderPipelineMTL.mm",
      "src/dawn_native/metal/ResourceUploader.h",
      "src/dawn_native/metal/ResourceUploader.mm",
      "src/dawn_native/metal/SamplerMTL.h",
      "src/dawn_native/metal/SamplerMTL.mm",
      "src/dawn_native/metal/ShaderModuleMTL.h",
      "src/dawn_native/metal/ShaderModuleMTL.mm",
      "src/dawn_native/metal/SwapChainMTL.h",
      "src/dawn_native/metal/SwapChainMTL.mm",
      "src/dawn_native/metal/TextureMTL.h",
      "src/dawn_native/metal/TextureMTL.mm",
    ]
  }

  if (dawn_enable_null) {
    sources += [
      "src/dawn_native/null/NullBackend.cpp",
      "src/dawn_native/null/NullBackend.h",
    ]
  }

  if (dawn_enable_opengl) {
    deps += [ "third_party:glad" ]
    sources += [
      "src/dawn_native/opengl/BlendStateGL.cpp",
      "src/dawn_native/opengl/BlendStateGL.h",
      "src/dawn_native/opengl/BufferGL.cpp",
      "src/dawn_native/opengl/BufferGL.h",
      "src/dawn_native/opengl/CommandBufferGL.cpp",
      "src/dawn_native/opengl/CommandBufferGL.h",
      "src/dawn_native/opengl/ComputePipelineGL.cpp",
      "src/dawn_native/opengl/ComputePipelineGL.h",
      "src/dawn_native/opengl/DepthStencilStateGL.cpp",
      "src/dawn_native/opengl/DepthStencilStateGL.h",
      "src/dawn_native/opengl/DeviceGL.cpp",
      "src/dawn_native/opengl/DeviceGL.h",
      "src/dawn_native/opengl/Forward.h",
      "src/dawn_native/opengl/InputStateGL.cpp",
      "src/dawn_native/opengl/InputStateGL.h",
      "src/dawn_native/opengl/PersistentPipelineStateGL.cpp",
      "src/dawn_native/opengl/PersistentPipelineStateGL.h",
      "src/dawn_native/opengl/PipelineGL.cpp",
      "src/dawn_native/opengl/PipelineGL.h",
      "src/dawn_native/opengl/PipelineLayoutGL.cpp",
      "src/dawn_native/opengl/PipelineLayoutGL.h",
      "src/dawn_native/opengl/QueueGL.cpp",
      "src/dawn_native/opengl/QueueGL.h",
      "src/dawn_native/opengl/RenderPipelineGL.cpp",
      "src/dawn_native/opengl/RenderPipelineGL.h",
      "src/dawn_native/opengl/SamplerGL.cpp",
      "src/dawn_native/opengl/SamplerGL.h",
      "src/dawn_native/opengl/ShaderModuleGL.cpp",
      "src/dawn_native/opengl/ShaderModuleGL.h",
      "src/dawn_native/opengl/SwapChainGL.cpp",
      "src/dawn_native/opengl/SwapChainGL.h",
      "src/dawn_native/opengl/TextureGL.cpp",
      "src/dawn_native/opengl/TextureGL.h",
    ]
  }

  if (dawn_enable_vulkan) {
    deps += [ "third_party:vulkan_headers" ]
    sources += [
      "src/dawn_native/vulkan/BindGroupLayoutVk.cpp",
      "src/dawn_native/vulkan/BindGroupLayoutVk.h",
      "src/dawn_native/vulkan/BindGroupVk.cpp",
      "src/dawn_native/vulkan/BindGroupVk.h",
      "src/dawn_native/vulkan/BlendStateVk.cpp",
      "src/dawn_native/vulkan/BlendStateVk.h",
      "src/dawn_native/vulkan/BufferUploader.cpp",
      "src/dawn_native/vulkan/BufferUploader.h",
      "src/dawn_native/vulkan/BufferVk.cpp",
      "src/dawn_native/vulkan/BufferVk.h",
      "src/dawn_native/vulkan/CommandBufferVk.cpp",
      "src/dawn_native/vulkan/CommandBufferVk.h",
      "src/dawn_native/vulkan/ComputePipelineVk.cpp",
      "src/dawn_native/vulkan/ComputePipelineVk.h",
      "src/dawn_native/vulkan/DepthStencilStateVk.cpp",
      "src/dawn_native/vulkan/DepthStencilStateVk.h",
      "src/dawn_native/vulkan/DeviceVk.cpp",
      "src/dawn_native/vulkan/DeviceVk.h",
      "src/dawn_native/vulkan/FencedDeleter.cpp",
      "src/dawn_native/vulkan/FencedDeleter.h",
      "src/dawn_native/vulkan/Forward.h",
      "src/dawn_native/vulkan/InputStateVk.cpp",
      "src/dawn_native/vulkan/InputStateVk.h",
      "src/dawn_native/vulkan/MemoryAllocator.cpp",
      "src/dawn_native/vulkan/MemoryAllocator.h",
      "src/dawn_native/vulkan/NativeSwapChainImplVk.cpp",
      "src/dawn_native/vulkan/NativeSwapChainImplVk.h",
      "src/dawn_native/vulkan/PipelineLayoutVk.cpp",
      "src/dawn_native/vulkan/PipelineLayoutVk.h",
      "src/dawn_native/vulkan/QueueVk.cpp",
      "src/dawn_native/vulkan/QueueVk.h",
      "src/dawn_native/vulkan/RenderPassCache.cpp",
      "src/dawn_native/vulkan/RenderPassCache.h",
      "src/dawn_native/vulkan/RenderPassDescriptorVk.cpp",
      "src/dawn_native/vulkan/RenderPassDescriptorVk.h",
      "src/dawn_native/vulkan/RenderPipelineVk.cpp",
      "src/dawn_native/vulkan/RenderPipelineVk.h",
      "src/dawn_native/vulkan/SamplerVk.cpp",
      "src/dawn_native/vulkan/SamplerVk.h",
      "src/dawn_native/vulkan/ShaderModuleVk.cpp",
      "src/dawn_native/vulkan/ShaderModuleVk.h",
      "src/dawn_native/vulkan/SwapChainVk.cpp",
      "src/dawn_native/vulkan/SwapChainVk.h",
      "src/dawn_native/vulkan/TextureVk.cpp",
      "src/dawn_native/vulkan/TextureVk.h",
      "src/dawn_native/vulkan/VulkanFunctions.cpp",
      "src/dawn_native/vulkan/VulkanFunctions.h",
      "src/dawn_native/vulkan/VulkanInfo.cpp",
      "src/dawn_native/vulkan/VulkanInfo.h",
    ]
  }
}

# The shared library for libdawn_native for use by samples, tests, etc.
shared_library("libdawn_native") {
  deps = [
    ":libdawn_native_sources",
  ]

  #Make headers publically visible
  public_deps = [
    ":libdawn_native_headers",
  ]
  public_configs = [ ":libdawn_public" ]

  # Tell dependents where to find this shared library
  if (is_mac) {
    ldflags = [
      "-install_name",
      "@rpath/${target_name}.dylib",
    ]
  }
}

###############################################################################
# libdawn_wire.so
###############################################################################

# Public libdawn_wire headers so they can be publically visible for
# dependencies of libdawn_wire
source_set("libdawn_wire_headers") {
  public_deps = [
    ":dawn_headers",
  ]
  sources = [
    "src/include/dawn_wire/Wire.h",
    "src/include/dawn_wire/dawn_wire_export.h",
  ]
}

dawn_generator("libdawn_wire_gen") {
  target = "dawn_wire"
  outputs = [
    "dawn_wire/WireServer.cpp",
    "dawn_wire/WireCmd_autogen.h",
    "dawn_wire/WireClient.cpp",
    "dawn_wire/WireCmd_autogen.cpp",
  ]
}

shared_library("libdawn_wire") {
  deps = [
    ":dawn_common",
    ":libdawn_wire_gen",
    ":libdawn_wire_headers",
  ]

  configs += [ ":dawn_internal" ]
  defines = [ "DAWN_WIRE_IMPLEMENTATION" ]
  sources = get_target_outputs(":libdawn_wire_gen")
  sources += [ "src/dawn_wire/WireCmd.h" ]

  #Make headers publically visible
  public_deps = [
    ":libdawn_wire_headers",
  ]
  public_configs = [ ":libdawn_public" ]

  # Tell dependents where to find this shared library
  if (is_mac) {
    ldflags = [
      "-install_name",
      "@rpath/${target_name}.dylib",
    ]
  }
}

###############################################################################
# Utils for tests and samples
###############################################################################

static_library("dawn_utils") {
  configs += [ ":dawn_internal" ]

  sources = [
    "src/utils/BackendBinding.cpp",
    "src/utils/BackendBinding.h",
    "src/utils/DawnHelpers.cpp",
    "src/utils/DawnHelpers.h",
    "src/utils/SystemUtils.cpp",
    "src/utils/SystemUtils.h",
    "src/utils/TerribleCommandBuffer.cpp",
    "src/utils/TerribleCommandBuffer.h",
  ]
  deps = [
    ":dawn_common",
    ":libdawn_native",
    ":libdawn_wire",
    "${dawn_shaderc_dir}:libshaderc",
    "third_party:glfw",
  ]
  libs = []

  if (dawn_enable_d3d12) {
    sources += [ "src/utils/D3D12Binding.cpp" ]
  }

  if (dawn_enable_metal) {
    sources += [ "src/utils/MetalBinding.mm" ]
    libs += [
      "Metal.framework",
      "QuartzCore.framework",
    ]

    # Suppress warnings that Metal isn't in the deployment target of Chrome
    if (is_mac) {
      cflags_objcc = [ "-Wno-unguarded-availability" ]
    }
  }

  if (dawn_enable_null) {
    sources += [ "src/utils/NullBinding.cpp" ]
  }

  if (dawn_enable_opengl) {
    sources += [ "src/utils/OpenGLBinding.cpp" ]
    deps += [ "third_party:glad" ]
  }

  if (dawn_enable_vulkan) {
    sources += [ "src/utils/VulkanBinding.cpp" ]
    deps += [ "third_party:vulkan_headers" ]
  }
}

###############################################################################
# Dawn test targets
###############################################################################

dawn_generator("mock_dawn_gen") {
  target = "mock_dawn"
  outputs = [
    "mock/mock_dawn.h",
    "mock/mock_dawn.cpp",
  ]
}

test("dawn_unittests") {
  configs += [ ":dawn_internal" ]

  deps = [
    ":dawn_common",
    ":dawn_headers",
    ":dawn_utils",
    ":libdawn",
    ":libdawn_native_sources",
    ":libdawn_wire",
    ":mock_dawn_gen",
    "third_party:gmock",
    "third_party:gtest",
  ]

  sources = get_target_outputs(":mock_dawn_gen")
  sources += [
    "src/tests/UnittestsMain.cpp",
    "src/tests/unittests/BitSetIteratorTests.cpp",
    "src/tests/unittests/CommandAllocatorTests.cpp",
    "src/tests/unittests/EnumClassBitmasksTests.cpp",
    "src/tests/unittests/ErrorTests.cpp",
    "src/tests/unittests/MathTests.cpp",
    "src/tests/unittests/ObjectBaseTests.cpp",
    "src/tests/unittests/PerStageTests.cpp",
    "src/tests/unittests/RefCountedTests.cpp",
    "src/tests/unittests/ResultTests.cpp",
    "src/tests/unittests/SerialQueueTests.cpp",
    "src/tests/unittests/ToBackendTests.cpp",
    "src/tests/unittests/WireTests.cpp",
    "src/tests/unittests/validation/BindGroupValidationTests.cpp",
    "src/tests/unittests/validation/BlendStateValidationTests.cpp",
    "src/tests/unittests/validation/BufferValidationTests.cpp",
    "src/tests/unittests/validation/CommandBufferValidationTests.cpp",
    "src/tests/unittests/validation/ComputeValidationTests.cpp",
    "src/tests/unittests/validation/CopyCommandsValidationTests.cpp",
    "src/tests/unittests/validation/DepthStencilStateValidationTests.cpp",
    "src/tests/unittests/validation/DynamicStateCommandValidationTests.cpp",
    "src/tests/unittests/validation/InputStateValidationTests.cpp",
    "src/tests/unittests/validation/PushConstantsValidationTests.cpp",
    "src/tests/unittests/validation/RenderPassDescriptorValidationTests.cpp",
    "src/tests/unittests/validation/RenderPipelineValidationTests.cpp",
    "src/tests/unittests/validation/ShaderModuleValidationTests.cpp",
    "src/tests/unittests/validation/TextureViewValidationTests.cpp",
    "src/tests/unittests/validation/ValidationTest.cpp",
    "src/tests/unittests/validation/ValidationTest.h",
    "src/tests/unittests/validation/VertexBufferValidationTests.cpp",
  ]

  if (dawn_enable_d3d12) {
    sources += [ "src/tests/unittests/d3d12/CopySplitTests.cpp" ]
  }
}

test("dawn_end2end_tests") {
  configs += [ ":dawn_internal" ]

  deps = [
    ":dawn_common",
    ":dawn_utils",
    ":libdawn",
    ":libdawn_native",
    ":libdawn_wire",
    "third_party:glfw",
    "third_party:gtest",
  ]

  sources = [
    "src/tests/DawnTest.cpp",
    "src/tests/DawnTest.h",
    "src/tests/End2EndTestsMain.cpp",
    "src/tests/end2end/BasicTests.cpp",
    "src/tests/end2end/BindGroupTests.cpp",
    "src/tests/end2end/BlendStateTests.cpp",
    "src/tests/end2end/BufferTests.cpp",
    "src/tests/end2end/ComputeCopyStorageBufferTests.cpp",
    "src/tests/end2end/CopyTests.cpp",
    "src/tests/end2end/DepthStencilStateTests.cpp",
    "src/tests/end2end/DrawElementsTests.cpp",
    "src/tests/end2end/IndexFormatTests.cpp",
    "src/tests/end2end/InputStateTests.cpp",
    "src/tests/end2end/PrimitiveTopologyTests.cpp",
    "src/tests/end2end/PushConstantTests.cpp",
    "src/tests/end2end/RenderPassLoadOpTests.cpp",
    "src/tests/end2end/SamplerTests.cpp",
    "src/tests/end2end/ScissorTests.cpp",
    "src/tests/end2end/TextureViewTests.cpp",
    "src/tests/end2end/ViewportOrientationTests.cpp",
  ]
}

###############################################################################
# Dawn samples, only in standalone builds
###############################################################################

if (dawn_standalone) {
  # Static library to contain code and dependencies common to all samples
  static_library("dawn_sample_utils") {
    sources = [
      "examples/SampleUtils.cpp",
      "examples/SampleUtils.h",
    ]

    # Export all of these as public deps so that `gn check` allows includes
    public_deps = [
      ":dawn_common",
      ":dawn_utils",
      ":libdawn",
      ":libdawn_native",
      ":libdawn_wire",
      "third_party:glfw",
    ]
    public_configs = [ ":dawn_internal" ]
  }

  # Template for samples to avoid listing dawn_sample_utils as a dep every time
  template("dawn_sample") {
    executable(target_name) {
      deps = [
        ":dawn_sample_utils",
      ]
      forward_variables_from(invoker, "*", [ "deps" ])

      if (defined(invoker.deps)) {
        deps += invoker.deps
      }
    }
  }

  dawn_sample("CppHelloTriangle") {
    sources = [
      "examples/CppHelloTriangle.cpp",
    ]
  }

  dawn_sample("CHelloTriangle") {
    sources = [
      "examples/CHelloTriangle.cpp",
    ]
  }

  dawn_sample("ComputeBoids") {
    sources = [
      "examples/ComputeBoids.cpp",
    ]
    deps = [
      "third_party:glm",
    ]
  }

  dawn_sample("Animometer") {
    sources = [
      "examples/Animometer.cpp",
    ]
  }

  dawn_sample("CubeReflection") {
    sources = [
      "examples/CubeReflection.cpp",
    ]
    deps = [
      "third_party:glm",
    ]
  }

  dawn_sample("glTFViewer") {
    sources = [
      "examples/glTFViewer/Camera.inl",
      "examples/glTFViewer/glTFViewer.cpp",
    ]
    deps = [
      "third_party:glm",
      "third_party:tiny_gltf_loader",
    ]
  }

  group("dawn_samples") {
    deps = [
      ":Animometer",
      ":CHelloTriangle",
      ":ComputeBoids",
      ":CppHelloTriangle",
      ":CubeReflection",
      ":glTFViewer",
    ]
  }
}