1 | # ~~~
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2 | # Copyright 2018-2023 The Khronos Group Inc.
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3 | # Copyright 2018-2023 Valve Corporation
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4 | # Copyright 2018-2023 LunarG, Inc.
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5 | #
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6 | # SPDX-License-Identifier: Apache-2.0
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7 | # ~~~
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8 | cmake_minimum_required(VERSION 3.15...3.25)
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9 |
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10 | # NOTE: Parsing the version like this is suboptimal but neccessary due to our release process:
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11 | # https://github.com/KhronosGroup/Vulkan-Headers/pull/346
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12 | #
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13 | # As shown a more robust approach would be just to add basic test code to check the project version.
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14 | function(vlk_get_header_version)
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15 | set(vulkan_core_header_file "${CMAKE_CURRENT_SOURCE_DIR}/include/vulkan/vulkan_core.h")
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16 | if (NOT EXISTS ${vulkan_core_header_file})
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17 | message(FATAL_ERROR "Couldn't find vulkan_core.h!")
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18 | endif()
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19 |
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20 | file(READ ${vulkan_core_header_file} ver)
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21 |
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22 | if (ver MATCHES "#define[ ]+VK_HEADER_VERSION_COMPLETE[ ]+VK_MAKE_API_VERSION\\([ ]*[0-9]+,[ ]*([0-9]+),[ ]*([0-9]+),[ ]*VK_HEADER_VERSION[ ]*\\)")
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23 | set(MAJOR_VERSION "${CMAKE_MATCH_1}")
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24 | set(MINOR_VERSION "${CMAKE_MATCH_2}")
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25 | else()
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26 | message(FATAL_ERROR "Couldn't get major/minor version")
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27 | endif()
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28 |
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29 | if (ver MATCHES "#define[ ]+VK_HEADER_VERSION[ ]+([0-9]+)")
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30 | set(PATCH_VERSION "${CMAKE_MATCH_1}")
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31 | else()
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32 | message(FATAL_ERROR "Couldn't get the patch version")
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33 | endif()
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34 |
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35 | set(VK_VERSION_STRING "${MAJOR_VERSION}.${MINOR_VERSION}.${PATCH_VERSION}" PARENT_SCOPE)
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36 | endfunction()
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37 | vlk_get_header_version()
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38 |
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39 | project(VULKAN_HEADERS LANGUAGES C VERSION ${VK_VERSION_STRING})
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40 |
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41 | add_library(Vulkan-Headers INTERFACE)
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42 | add_library(Vulkan::Headers ALIAS Vulkan-Headers)
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43 | target_include_directories(Vulkan-Headers INTERFACE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>)
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44 |
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45 | if (CMAKE_VERSION VERSION_LESS "3.21")
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46 | # https://cmake.org/cmake/help/latest/variable/PROJECT_IS_TOP_LEVEL.html
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47 | string(COMPARE EQUAL ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_SOURCE_DIR} PROJECT_IS_TOP_LEVEL)
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48 | endif()
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49 |
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50 | if (PROJECT_IS_TOP_LEVEL)
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51 | option(BUILD_TESTS "Build the tests")
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52 | if (BUILD_TESTS)
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53 | enable_testing()
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54 | add_subdirectory(tests)
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55 | endif()
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56 |
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57 | include(GNUInstallDirs)
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58 | include(CMakePackageConfigHelpers)
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59 |
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60 | install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/include/vk_video" DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
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61 | install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/include/vulkan" DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
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62 | # Preserve source permissions https://github.com/KhronosGroup/Vulkan-Headers/issues/336
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63 | install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/registry" DESTINATION "${CMAKE_INSTALL_DATADIR}/vulkan" USE_SOURCE_PERMISSIONS)
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64 |
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65 | set_target_properties(Vulkan-Headers PROPERTIES EXPORT_NAME "Headers")
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66 |
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67 | install(TARGETS Vulkan-Headers EXPORT VulkanHeadersConfig INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
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68 | install(EXPORT VulkanHeadersConfig NAMESPACE "Vulkan::" DESTINATION "share/cmake/VulkanHeaders")
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69 |
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70 | set(version_config "${CMAKE_CURRENT_BINARY_DIR}/generated/VulkanHeadersConfigVersion.cmake")
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71 | write_basic_package_version_file("${version_config}" COMPATIBILITY SameMajorVersion ARCH_INDEPENDENT)
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72 | install(FILES "${version_config}" DESTINATION "share/cmake/VulkanHeaders")
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73 | endif()
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