| # Copyright 2024 The Dawn & Tint Authors |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are met: |
| # |
| # 1. Redistributions of source code must retain the above copyright notice, this |
| # list of conditions and the following disclaimer. |
| # |
| # 2. Redistributions in binary form must reproduce the above copyright notice, |
| # this list of conditions and the following disclaimer in the documentation |
| # and/or other materials provided with the distribution. |
| # |
| # 3. Neither the name of the copyright holder nor the names of its |
| # contributors may be used to endorse or promote products derived from |
| # this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| # DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| DawnJSONGenerator( |
| TARGET "emdawnwebgpu_headers" |
| PRINT_NAME "Dawn WebGPU Emscripten headers" |
| OUTPUT_HEADERS EMDAWNWEBGPU_HEADERS_GEN_HEADERS |
| ) |
| add_custom_target(emdawnwebgpu_headers_gen |
| DEPENDS ${EMDAWNWEBGPU_HEADERS_GEN_HEADERS} |
| ) |
| |
| DawnJSONGenerator( |
| TARGET "emdawnwebgpu_js" |
| PRINT_NAME "Dawn WebGPU Emscripten JS files" |
| OUTPUT_JSONS EMDAWNWEBGPU_STRUCT_INFO_JSON_GEN_SOURCES |
| OUTPUT_JS EMDAWNWEBGPU_JS_GEN_SOURCES |
| ) |
| add_custom_target(emdawnwebgpu_js_gen |
| DEPENDS ${EMDAWNWEBGPU_STRUCT_INFO_JSON_GEN_SOURCES} ${EMDAWNWEBGPU_JS_GEN_SOURCES} |
| ) |
| |
| # When Emscripten is available, we can use one of its helper scripts to generate |
| # the struct info needed for our bindings fork (third_party/emdawnwebgpu). |
| # Those helpers, and their tree of generated dependencies, are: |
| # |
| # - library_webgpu_generated_struct_info.js |
| # is constructed by concatenating: |
| # - Some glue "snippets" from txt files |
| # - webgpu_generated_struct_info{32,64}.json |
| # which are generated using an Emscripten tool "gen_struct_info.py", from: |
| # - webgpu.h (generated from dawn.json) |
| # - struct_info_webgpu.json (generated from dawn.json) |
| # |
| # The bindings also require the following helpers (generated above): |
| # |
| # - library_webgpu_enum_tables.js |
| # - library_webgpu_generated_sig_info.js |
| # which we generate directly instead of using "gen_sig_info.py" |
| if (${DAWN_ENABLE_EMSCRIPTEN}) |
| set(EM_SRC_DIR "${DAWN_SRC_DIR}/emdawnwebgpu") |
| set(EM_BUILD_GEN_DIR "${DAWN_BUILD_GEN_DIR}/src/emdawnwebgpu") |
| |
| function(webgpu_gen_struct_info) |
| cmake_parse_arguments(PARSE_ARGV 0 arg |
| "" |
| "OUTPUT_JSON;WASM64" |
| "" |
| ) |
| if (arg_UNPARSED_ARGUMENTS) |
| message(FATAL_ERROR |
| "Unparsed arguments for webgpu_gen_struct_info: " |
| "${arg_UNPARSED_ARGUMENTS}") |
| endif() |
| |
| set(ARGS |
| "${DAWN_EMSCRIPTEN_TOOLCHAIN}/tools/maint/gen_struct_info.py" |
| -q |
| "${EM_BUILD_GEN_DIR}/struct_info_webgpu.json" |
| "-I=${EM_BUILD_GEN_DIR}/include" |
| ) |
| |
| set(PRINT_NAME) |
| if (${arg_WASM64}) |
| set(PRINT_NAME "webgpu_generated_struct_info64.json") |
| list(APPEND ARGS "--wasm64") |
| else() |
| set(PRINT_NAME "webgpu_generated_struct_info32.json") |
| endif() |
| set(OUTPUT "${EM_BUILD_GEN_DIR}/${PRINT_NAME}") |
| set(${arg_OUTPUT_JSON} "${OUTPUT}" PARENT_SCOPE) |
| list(APPEND ARGS "-o=${OUTPUT}") |
| |
| add_custom_command( |
| COMMAND ${ARGS} |
| OUTPUT ${OUTPUT} |
| COMMENT "Dawn Emscripten: Generating ${PRINT_NAME}." |
| ) |
| |
| # Prior to CMake 3.20 the GENERATED property is local to a directory which means that putting |
| # generated headers in INTERFACE properties causes dependent targets to complain that they |
| # cannot find the file. (because they don't see it as generated and want to check is is |
| # actually on the filesystem). |
| # Work around this by generating the files once if they aren't present at configuration time. |
| if (NOT EXISTS ${OUTPUT}) |
| message(STATUS "Dawn: Generating initial versions of files for ${PRINT_NAME}.") |
| execute_process(COMMAND ${ARGS} RESULT_VARIABLE RET) |
| if (NOT RET EQUAL 0) |
| message(FATAL_ERROR "Dawn: Failed to generate the initial version of files for ${PRINT_NAME}. Base args are '${ARGS}'.") |
| endif() |
| endif() |
| endfunction() |
| |
| message(STATUS "Dawn: Configuring Emscripten gen_struct_info for WebGPU.") |
| |
| webgpu_gen_struct_info( |
| OUTPUT_JSON WEBGPU_STRUCT_INFO_GEN32 |
| WASM64 OFF |
| ) |
| add_custom_target(webgpu_generated_struct_info32 |
| DEPENDS emdawnwebgpu_headers_gen ${EMDAWNWEBGPU_STRUCT_INFO_JSON_GEN_SOURCES} ${WEBGPU_STRUCT_INFO_GEN32} |
| ) |
| webgpu_gen_struct_info( |
| OUTPUT_JSON WEBGPU_STRUCT_INFO_GEN64 |
| WASM64 ON |
| ) |
| add_custom_target(webgpu_generated_struct_info64 |
| DEPENDS emdawnwebgpu_headers_gen ${EMDAWNWEBGPU_STRUCT_INFO_JSON_GEN_SOURCES} ${WEBGPU_STRUCT_INFO_GEN64} |
| ) |
| |
| # TODO(crbug.com/346806934): Consider using CMake builtin `cat` as per https://stackoverflow.com/a/62362885, |
| # especially if we are to remove the GN build where concat.py is needed. |
| function(webgpu_gen_struct_info_js) |
| cmake_parse_arguments(PARSE_ARGV 0 arg |
| "" |
| "OUTPUT_JS" |
| "" |
| ) |
| if (arg_UNPARSED_ARGUMENTS) |
| message(FATAL_ERROR |
| "Unparsed arguments for webgpu_gen_struct_info_js: " |
| "${arg_UNPARSED_ARGUMENTS}") |
| endif() |
| |
| set(PRINT_NAME library_webgpu_generated_struct_info.js) |
| set(OUTPUT "${EM_BUILD_GEN_DIR}/${PRINT_NAME}") |
| set(ARGS |
| ${Python3_EXECUTABLE} |
| "${EM_SRC_DIR}/concat.py" |
| "${OUTPUT}" |
| "${EM_SRC_DIR}/snippets/library_webgpu_struct_info_part1.txt" |
| "${EM_BUILD_GEN_DIR}/webgpu_generated_struct_info32.json" |
| "${EM_SRC_DIR}/snippets/library_webgpu_struct_info_part2.txt" |
| "${EM_BUILD_GEN_DIR}/webgpu_generated_struct_info64.json" |
| "${EM_SRC_DIR}/snippets/library_webgpu_struct_info_part3.txt" |
| ) |
| set(${arg_OUTPUT_JS} "${OUTPUT}" PARENT_SCOPE) |
| |
| add_custom_command( |
| COMMAND ${ARGS} |
| OUTPUT ${OUTPUT} |
| COMMENT "Dawn Emscripten: Generating ${PRINT_NAME}." |
| ) |
| |
| # Prior to CMake 3.20 the GENERATED property is local to a directory which means that putting |
| # generated headers in INTERFACE properties causes dependent targets to complain that they |
| # cannot find the file. (because they don't see it as generated and want to check is is |
| # actually on the filesystem). |
| # Work around this by generating the files once if they aren't present at configuration time. |
| if (NOT EXISTS ${OUTPUT}) |
| message(STATUS "Dawn: Generating initial versions of files for ${PRINT_NAME}.") |
| execute_process(COMMAND ${ARGS} RESULT_VARIABLE RET) |
| if (NOT RET EQUAL 0) |
| message(FATAL_ERROR "Dawn: Failed to generate the initial version of files for ${PRINT_NAME}. Base args are '${ARGS}'.") |
| endif() |
| endif() |
| endfunction() |
| |
| webgpu_gen_struct_info_js( |
| OUTPUT_JS EMDAWNWEBGPU_STRUCT_INFO_JS |
| ) |
| add_custom_target(webgpu_generated_struct_info_js |
| DEPENDS webgpu_generated_struct_info32 webgpu_generated_struct_info64 ${EMDAWNWEBGPU_STRUCT_INFO_JS} |
| ) |
| |
| add_library(emdawnwebgpu_config INTERFACE) |
| target_include_directories(emdawnwebgpu_config BEFORE INTERFACE |
| "${EM_BUILD_GEN_DIR}/include" |
| ) |
| target_link_options(emdawnwebgpu_config INTERFACE |
| # We are using Dawn-generated bindings, not built-in ones |
| "-sUSE_WEBGPU=0" |
| # We need Asyncify for Future implementation. |
| "-sASYNCIFY=1" |
| # The JS libraries needed for bindings |
| "--js-library=${EM_BUILD_GEN_DIR}/library_webgpu_enum_tables.js" |
| "--js-library=${EM_BUILD_GEN_DIR}/library_webgpu_generated_struct_info.js" |
| "--js-library=${EM_BUILD_GEN_DIR}/library_webgpu_generated_sig_info.js" |
| "--js-library=${DAWN_EMDAWNWEBGPU_DIR}/library_webgpu.js" |
| "--js-library=${DAWN_EMDAWNWEBGPU_DIR}/library_html5_webgpu.js" |
| "--closure-args=--externs=${DAWN_EMSCRIPTEN_TOOLCHAIN}/src/closure-externs/webgpu-externs.js" |
| ) |
| |
| dawn_add_library( |
| emdawnwebgpu_c |
| ENABLE_EMSCRIPTEN |
| HEADERS |
| "${EM_BUILD_GEN_DIR}/include/webgpu/webgpu.h" |
| SOURCES |
| "${DAWN_EMDAWNWEBGPU_DIR}/webgpu.cpp" |
| DEPENDS |
| emdawnwebgpu_config |
| ) |
| |
| dawn_add_library( |
| emdawnwebgpu_cpp |
| ENABLE_EMSCRIPTEN |
| HEADER_ONLY |
| HEADERS |
| "${EM_BUILD_GEN_DIR}/include/webgpu/webgpu_cpp.h" |
| "${EM_BUILD_GEN_DIR}/include/webgpu/webgpu_cpp_chained_struct.h" |
| "${DAWN_INCLUDE_DIR}/webgpu/webgpu_enum_class_bitmasks.h" |
| DEPENDS |
| emdawnwebgpu_c |
| ) |
| |
| endif() |
