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cmake_minimum_required(VERSION 3.13)
find_package(Python3 REQUIRED)
# Shader locations
set(SHADER_DIR "${CMAKE_CURRENT_SOURCE_DIR}/wgsl-shaders")
set(SHADER_OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/generated")
set(SHADER_HEADER "${SHADER_OUTPUT_DIR}/ggml-wgsl-shaders.hpp")
file(MAKE_DIRECTORY ${SHADER_OUTPUT_DIR})
message(STATUS "Shader output dir: ${SHADER_OUTPUT_DIR}")
# Find all WGSL files
file(GLOB WGSL_SHADER_FILES "${SHADER_DIR}/*.wgsl")
# Generate the header using a Python script
add_custom_command(
OUTPUT ${SHADER_HEADER}
COMMAND ${CMAKE_COMMAND} -E echo "Embedding WGSL shaders to ggml-wgsl-shaders.hpp"
COMMAND ${CMAKE_COMMAND} -E make_directory ${SHADER_OUTPUT_DIR}
COMMAND ${CMAKE_COMMAND} -E env PYTHONIOENCODING=utf-8
${Python3_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/wgsl-shaders/embed_wgsl.py
--input_dir "${SHADER_DIR}"
--output_file "${SHADER_HEADER}"
DEPENDS ${WGSL_SHADER_FILES} ${CMAKE_CURRENT_SOURCE_DIR}/wgsl-shaders/embed_wgsl.py
VERBATIM
)
add_custom_target(generate_shaders DEPENDS ${SHADER_HEADER})
ggml_add_backend_library(ggml-webgpu
ggml-webgpu.cpp
${SHADER_HEADER}
../../include/ggml-webgpu.h
)
add_dependencies(ggml-webgpu generate_shaders)
if(EMSCRIPTEN)
set(EMDAWNWEBGPU_DIR "" CACHE PATH "Path to emdawnwebgpu_pkg")
if(NOT EMDAWNWEBGPU_DIR)
# default built-in port
target_compile_options(ggml-webgpu PRIVATE "--use-port=emdawnwebgpu")
target_link_options(ggml-webgpu INTERFACE "--use-port=emdawnwebgpu")
else()
# custom port
target_compile_options(ggml-webgpu PRIVATE "--use-port=${EMDAWNWEBGPU_DIR}/emdawnwebgpu.port.py")
target_link_options(ggml-webgpu INTERFACE "--use-port=${EMDAWNWEBGPU_DIR}/emdawnwebgpu.port.py")
endif()
if (GGML_WEBGPU_JSPI)
target_compile_options(ggml-webgpu PRIVATE "-fwasm-exceptions")
target_link_options(ggml-webgpu INTERFACE "-sJSPI" "-fwasm-exceptions")
else()
target_compile_options(ggml-webgpu PRIVATE "-fexceptions")
target_link_options(ggml-webgpu INTERFACE "-sASYNCIFY" "-exceptions")
endif()
else()
find_package(Dawn REQUIRED)
set(DawnWebGPU_TARGET dawn::webgpu_dawn)
endif()
if (GGML_WEBGPU_DEBUG)
target_compile_definitions(ggml-webgpu PRIVATE GGML_WEBGPU_DEBUG=1)
if(EMSCRIPTEN)
target_link_options(ggml-webgpu INTERFACE "-sASSERTIONS=2")
endif()
endif()
if (GGML_WEBGPU_CPU_PROFILE)
target_compile_definitions(ggml-webgpu PRIVATE GGML_WEBGPU_CPU_PROFILE=1)
endif()
if (GGML_WEBGPU_GPU_PROFILE)
target_compile_definitions(ggml-webgpu PRIVATE GGML_WEBGPU_GPU_PROFILE=1)
endif()
target_include_directories(ggml-webgpu PRIVATE ${SHADER_OUTPUT_DIR})
target_link_libraries(ggml-webgpu PRIVATE ${DawnWebGPU_TARGET})
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