94 lines
4.1 KiB
CMake
94 lines
4.1 KiB
CMake
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# Copyright (c) Microsoft Corporation. All rights reserved.
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# Licensed under the MIT License.
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# Add shader compilation to a target
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#
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# target_add_shader(TARGET <target> SHADERS <shader>... [DEPENDS <depend>...])
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#
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# Adds build rules to combile <shaders> before building <target>. Each shader will
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# generate a header output with the same name and extension ".hcs" which can be included
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# in your program. The directory with the resultant .hcs files will be available in the
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# include path of <target>
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#
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# Example:
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# target_add_shader(TARGET myprogram SHADERS foo.hlsl bar.hlsl DEPENDS common.hlsl)
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#
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# Compiles foo.hlsl to foo.hcs and bar.hlsl to bar.hcs. Since foo.hlsl #includes common.hlsl
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# common.hlsl is added to the DEPENDS. When common.hlsl is modified the incremental build will
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# recompile foo.hcs, bar.hcs, and myprogram.
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#
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# If the ninja generator is used, depends are automatically determined when compiling the shader
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#
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include_guard(GLOBAL)
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function(target_add_shaders)
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# Parse arguments to
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# TARGET_ADD_SHADERS_SHADERS : List of shaders to compiledshaders
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# TARGET_ADD_SHADERS_TARGET : Target the shaders are depenent on
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# TARGET_ADD_SHADERS_DEPENDS : Additional dependencies for these shaders
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cmake_parse_arguments(TARGET_ADD_SHADERS "" "TARGET" "SHADERS;DEPENDS" ${ARGN})
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find_program(FXC fxc DOC "fx shader compiler")
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if ("${FXC}" STREQUAL "FXC-NOTFOUND")
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message(FATAL_ERROR "FX Shader compiler not found")
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endif()
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message(STATUS "Found FXC: ${FXC}")
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set(FXC_FLAGS "/nologo" "/Vi")
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if (("${CMAKE_BUILD_TYPE}" STREQUAL "Debug") AND ("${CMAKE_C_COMPILER_ID}" STREQUAL "MSVC"))
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set(FXC_FLAGS ${FXC_FLAGS} "/Zi" "/Od")
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endif()
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foreach (FILE ${TARGET_ADD_SHADERS_SHADERS})
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get_filename_component(FILE_WE ${FILE} NAME_WE)
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set(FX_HEADER ${CMAKE_CURRENT_BINARY_DIR}/compiledshaders/${FILE_WE}.hcs)
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set(DEPFILE ${CMAKE_CURRENT_BINARY_DIR}/${FILE_WE}.d)
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find_package(Python3 REQUIRED)
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# CaptureFxcDeps.py will capture the output and add any included .h files to the dependencies
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# through a depfile for ninja
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# Invoke the Shader compiler
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if (${CMAKE_GENERATOR} EQUAL "Ninja")
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add_custom_command(
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OUTPUT ${FX_HEADER}
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COMMAND ${Python3_EXECUTABLE} ${PROJECT_SOURCE_DIR}/cmake/CaptureFxcDeps.py --prefix ${PROJECT_BINARY_DIR} --depfile ${DEPFILE} --outputs ${FX_HEADER} --fxc ${FXC} ${FXC_FLAGS} /E"CSMain" /T cs_5_0 /Fh ${FX_HEADER} /Vn ${FILE_WE} ${FILE}
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WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
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DEPENDS ${FILE} ${TARGET_ADD_SHADERS_DEPENDS} ${PROJECT_SOURCE_DIR}/cmake/CaptureFxcDeps.py
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COMMENT "Building Shader ${FILE_WE}"
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DEPFILE ${DEPFILE}
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)
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else()
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# DEPFILE argument is not compatible with non-Ninja generators
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add_custom_command(
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OUTPUT ${FX_HEADER}
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COMMAND ${Python3_EXECUTABLE} ${PROJECT_SOURCE_DIR}/cmake/CaptureFxcDeps.py --prefix ${PROJECT_BINARY_DIR} --depfile ${DEPFILE} --outputs ${FX_HEADER} --fxc ${FXC} ${FXC_FLAGS} /E"CSMain" /T cs_5_0 /Fh ${FX_HEADER} /Vn ${FILE_WE} ${FILE}
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WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
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DEPENDS ${FILE} ${TARGET_ADD_SHADERS_DEPENDS} ${PROJECT_SOURCE_DIR}/cmake/CaptureFxcDeps.py
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COMMENT "Building Shader ${FILE_WE}"
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)
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endif()
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# Override behavior of MSBuild generator to automatically build the shader
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set_property(SOURCE ${FILE} PROPERTY VS_TOOL_OVERRIDE "None")
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# create a target for this shader
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set(SHADER_TARGET ${TARGET_ADD_SHADERS_TARGET}_${FILE_WE})
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add_custom_target(${SHADER_TARGET}
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DEPENDS ${FX_HEADER}
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SOURCES ${FILE})
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# Make the passed in target dependent on this shader
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add_dependencies(${TARGET_ADD_SHADERS_TARGET} ${SHADER_TARGET})
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endforeach(FILE)
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# Add the path to the shader header to the include path for the passed in target
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target_include_directories(${TARGET_ADD_SHADERS_TARGET} PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/compiledshaders)
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endfunction()
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