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[CMAKE] Add shader compile function: ax_add_shader [skip ci] 

- ax_add_shader(${FILE}): output compiled shader to ${CMAKE_BINARY_DIR}/runtime/shaders/${SC_LANG}/xxx_fs.bin
- ax_add_shader(${FILE} CUSTOM): output compiled shader to ${CMAKE_BINARY_DIR}/runtime/shaders/${SC_LANG}/xxx_fs.bin
- ax_add_shader(${FILE} CVAR): the shader will compiled to c hex header for embed include by C/C++ use
This commit is contained in:
halx99 2023-07-06 14:08:16 +08:00
parent 2786031541
commit 4cf6060e42
1 changed files with 81 additions and 0 deletions
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81
cmake/Modules/AXBuildHelpers.cmake
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@ -588,3 +588,84 @@ macro(ax_config_pred target_name pred)
target_compile_definitions(${target_name} PUBLIC ${pred}=1)
endif()
endmacro()
# glslcc
find_program(GLSLCC_EXE NAMES glslcc
PATHS ${_AX_ROOT_PATH}/tools/external/glslcc
)
if (NOT GLSLCC_EXE)
message("glslcc not found.")
message(FATAL_ERROR "Please run setup.ps1 again to download glslcc, and run CMake again.")
endif()
# This function allow make shader files (.frag, .vert) compiled with glslcc
# usage:
# - ax_add_shader(${FILE}): output compiled shader to ${CMAKE_BINARY_DIR}/runtime/shaders/${SC_LANG}/xxx_fs.bin
# - ax_add_shader(${FILE} CUSTOM): output compiled shader to ${CMAKE_BINARY_DIR}/runtime/shaders/${SC_LANG}/xxx_fs.bin
# - ax_add_shader(${FILE} CVAR): the shader will compiled to c hex header for embed include by C/C++ use
function (ax_add_shader FILE)
set(options CUSTOM CVAR)
cmake_parse_arguments(opt "${options}" "" "" ${ARGN})
get_filename_component(FILE_EXT ${FILE} LAST_EXT)
get_filename_component(FILE_NAME ${FILE} NAME_WE)
string(TOLOWER "${FILE_EXT}" FILE_EXT)
# silent when compile shader success
set(SC_FLAGS "--silent")
# shader lang
if(NOT opt_CUSTOM)
set(SHADER_CATALOG "runtime")
else()
set(SHADER_CATALOG "custom")
endif()
if(ANDROID OR WINRT OR AX_USE_ANGLE)
# version 300 es
set(OUT_DIR "${CMAKE_BINARY_DIR}/${SHADER_CATALOG}/shaders/essl")
set(OUT_LANG "ESSL")
list(APPEND SC_FLAGS "--lang=gles" "--profile=300")
elseif (WIN32 OR LINUX)
# version 330
set(OUT_DIR "${CMAKE_BINARY_DIR}/${SHADER_CATALOG}/shaders/glsl")
set(OUT_LANG "GLSL")
list(APPEND SC_FLAGS "--lang=glsl" "--profile=330")
elseif (APPLE)
set(OUT_DIR "${CMAKE_BINARY_DIR}/${SHADER_CATALOG}/shaders/msl")
set(OUT_LANG "MSL")
list(APPEND SC_FLAGS "--lang=msl" "--defines=METAL")
endif()
# input
if (FILE_EXT STREQUAL ".frag")
list(APPEND SC_FLAGS "--frag=${FILE}")
set(TYPE "fs")
elseif(FILE_EXT STREQUAL ".vert")
set(TYPE "vs")
list(APPEND SC_FLAGS "--vert=${FILE}")
else()
message(FATAL_ERROR "Invalid shader source, the file extesion must be one of .frag;.vert")
endif()
# output
file(MAKE_DIRECTORY ${OUT_DIR})
if (NOT opt_CVAR)
list(APPEND SC_FLAGS "--output=${OUT_DIR}/${FILE_NAME}.bin" )
# glscc will auto insert ${FILE_NAME}_vs.bin or ${FILE_NAME}_fs.bin
# so we set OUTPUT to match with it, otherwise will cause cause incremental build to work incorrectly.
set(OUTPUT_FILE "${OUT_DIR}/${FILE_NAME}_${TYPE}.bin")
else()
set(OUTPUT_FILE "${OUT_DIR}/${FILE_NAME}_${TYPE}.bin.h")
list(APPEND SC_FLAGS "${OUT_FILE}" "--cvar=shader_rt_${FILE_NAME}" "--output=${OUTPUT_FILE}")
endif()
# "Compiling ${SHADER_CATALOG} shader ${FILE} for ${OUT_LANG} ..."
set(compileCmdLine ${GLSLCC_EXE} ${SC_FLAGS})
string(REPLACE ";" " " SC_COMMENT "${compileCmdLine} ...")
add_custom_command(
MAIN_DEPENDENCY ${FILE} OUTPUT ${OUTPUT_FILE} COMMAND ${compileCmdLine}
COMMENT "${SC_COMMENT}"
)
endfunction()