# Copyright 2020 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.

# Don't build testing in third_party dependencies
set(BUILD_TESTING OFF)

if (NOT TARGET SPIRV-Headers)
    set(SPIRV_HEADERS_SKIP_EXAMPLES ON CACHE BOOL "" FORCE)
    set(SPIRV_HEADERS_SKIP_INSTALL ON CACHE BOOL "" FORCE)

    message(STATUS "Dawn: using SPIRV-Headers at ${DAWN_SPIRV_HEADERS_DIR}")
    add_subdirectory(${DAWN_SPIRV_HEADERS_DIR} "${CMAKE_CURRENT_BINARY_DIR}/spirv-headers")
endif()

if (NOT TARGET SPIRV-Tools)
    set(SPIRV_SKIP_TESTS ON CACHE BOOL "" FORCE)
    set(SPIRV_SKIP_EXECUTABLES ON CACHE BOOL "" FORCE)
    set(SKIP_SPIRV_TOOLS_INSTALL ON CACHE BOOL "" FORCE)

    message(STATUS "Dawn: using SPIRV-Tools at ${DAWN_SPIRV_TOOLS_DIR}")
    add_subdirectory(${DAWN_SPIRV_TOOLS_DIR} "${CMAKE_CURRENT_BINARY_DIR}/spirv-tools")
endif()

if (NOT TARGET glfw)
    set(GLFW_BUILD_DOCS OFF CACHE BOOL "" FORCE)
    set(GLFW_BUILD_TESTS OFF CACHE BOOL "" FORCE)
    set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)

    message(STATUS "Dawn: using GLFW at ${DAWN_GLFW_DIR}")
    add_subdirectory(${DAWN_GLFW_DIR} "${CMAKE_CURRENT_BINARY_DIR}/glfw")
endif()

if (NOT TARGET libtint)
    message(STATUS "Dawn: using Tint at ${DAWN_TINT_DIR}")
    set(TINT_BUILD_GLSL_WRITER ON)
    # Don't build the samples because they require glslang and Dawn does not
    # provide this third_party dependency.
    set(TINT_BUILD_SAMPLES OFF)
    # TODO(crbug.com/tint/455): Tint does not currently build with CMake when
    # BUILD_SHARED_LIBS=1, so always build it as static for now.
    set(BUILD_SHARED_LIBS_SAVED ${BUILD_SHARED_LIBS})
    set(BUILD_SHARED_LIBS 0)
    add_subdirectory(${DAWN_TINT_DIR} "${CMAKE_CURRENT_BINARY_DIR}/tint")
    set(BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS_SAVED})
endif()

if (NOT TARGET libabsl)
    message(STATUS "Dawn: using Abseil at ${DAWN_ABSEIL_DIR}")
    add_subdirectory(${DAWN_ABSEIL_DIR} "${CMAKE_CURRENT_BINARY_DIR}/abseil")
endif()

# Header-only library for khrplatform.h
add_library(dawn_khronos_platform INTERFACE)
target_sources(dawn_khronos_platform INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/khronos/KHR/khrplatform.h")
target_include_directories(dawn_khronos_platform INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/khronos")

# Header-only library for Vulkan headers
add_library(dawn_vulkan_headers INTERFACE)
target_sources(dawn_vulkan_headers INTERFACE
    "${CMAKE_CURRENT_SOURCE_DIR}/khronos/vulkan/vk_icd.h"
    "${CMAKE_CURRENT_SOURCE_DIR}/khronos/vulkan/vk_layer.h"
    "${CMAKE_CURRENT_SOURCE_DIR}/khronos/vulkan/vk_platform.h"
    "${CMAKE_CURRENT_SOURCE_DIR}/khronos/vulkan/vk_sdk_platform.h"
    "${CMAKE_CURRENT_SOURCE_DIR}/khronos/vulkan/vulkan.h"
    "${CMAKE_CURRENT_SOURCE_DIR}/khronos/vulkan/vulkan_core.h"
)
target_include_directories(dawn_vulkan_headers INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/khronos")