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-# Building for desktop (WebGPU-native) with Dawn:
-# 1. git clone https://github.com/google/dawn dawn
-# 2. cmake -B build -DIMGUI_DAWN_DIR=dawn
-# 3. cmake --build build
-# The resulting binary will be found at one of the following locations:
-# * build/Debug/example_glfw_wgpu[.exe]
-# * build/example_glfw_wgpu[.exe]
-
-# Building for Emscripten:
-# 1. Install Emscripten SDK following the instructions: https://emscripten.org/docs/getting_started/downloads.html
-# 2. Install Ninja build system
-# 3. emcmake cmake -G Ninja -B build
-# 3. cmake --build build
-# 4. emrun build/index.html
-
-cmake_minimum_required(VERSION 3.10.2)
-project(imgui_example_glfw_wgpu C CXX)
-
-if(NOT CMAKE_BUILD_TYPE)
- set(CMAKE_BUILD_TYPE Debug CACHE STRING "" FORCE)
-endif()
-
-set(CMAKE_CXX_STANDARD 17) # Dawn requires C++17
-
-# Dear ImGui
-set(IMGUI_DIR ../../)
-
-# Libraries
-if(EMSCRIPTEN)
- if(EMSCRIPTEN_VERSION VERSION_GREATER_EQUAL "3.1.57")
- set(IMGUI_EMSCRIPTEN_GLFW3 "--use-port=contrib.glfw3" CACHE STRING "Choose between --use-port=contrib.glfw3 and -sUSE_GLFW=3 for GLFW implementation (default to --use-port=contrib.glfw3)")
- else()
- # cannot use contrib.glfw3 prior to 3.1.57
- set(IMGUI_EMSCRIPTEN_GLFW3 "-sUSE_GLFW=3" CACHE STRING "Use -sUSE_GLFW=3 for GLFW implementation" FORCE)
- endif()
- set(LIBRARIES glfw)
- add_compile_options(-sDISABLE_EXCEPTION_CATCHING=1 -DIMGUI_DISABLE_FILE_FUNCTIONS=1)
-else()
- # Dawn wgpu desktop
- set(DAWN_FETCH_DEPENDENCIES ON)
- set(IMGUI_DAWN_DIR CACHE PATH "Path to Dawn repository")
- if (NOT IMGUI_DAWN_DIR)
- message(FATAL_ERROR "Please specify the Dawn repository by setting IMGUI_DAWN_DIR")
- endif()
-
- option(DAWN_FETCH_DEPENDENCIES "Use fetch_dawn_dependencies.py as an alternative to using depot_tools" ON)
-
- # Dawn builds many things by default - disable things we don't need
- option(DAWN_BUILD_SAMPLES "Enables building Dawn's samples" OFF)
- option(TINT_BUILD_CMD_TOOLS "Build the Tint command line tools" OFF)
- option(TINT_BUILD_DOCS "Build documentation" OFF)
- option(TINT_BUILD_TESTS "Build tests" OFF)
- if (NOT APPLE)
- option(TINT_BUILD_MSL_WRITER "Build the MSL output writer" OFF)
- endif()
- if(WIN32)
- option(TINT_BUILD_SPV_READER "Build the SPIR-V input reader" OFF)
- option(TINT_BUILD_WGSL_READER "Build the WGSL input reader" ON)
- option(TINT_BUILD_GLSL_WRITER "Build the GLSL output writer" OFF)
- option(TINT_BUILD_GLSL_VALIDATOR "Build the GLSL output validator" OFF)
- option(TINT_BUILD_SPV_WRITER "Build the SPIR-V output writer" OFF)
- option(TINT_BUILD_WGSL_WRITER "Build the WGSL output writer" ON)
- endif()
-
- add_subdirectory("${IMGUI_DAWN_DIR}" "${CMAKE_CURRENT_BINARY_DIR}/dawn" EXCLUDE_FROM_ALL)
-
- set(LIBRARIES webgpu_dawn webgpu_cpp webgpu_glfw glfw)
-endif()
-
-add_executable(example_glfw_wgpu
- main.cpp
- # backend files
- ${IMGUI_DIR}/backends/imgui_impl_glfw.cpp
- ${IMGUI_DIR}/backends/imgui_impl_wgpu.cpp
- # Dear ImGui files
- ${IMGUI_DIR}/imgui.cpp
- ${IMGUI_DIR}/imgui_draw.cpp
- ${IMGUI_DIR}/imgui_demo.cpp
- ${IMGUI_DIR}/imgui_tables.cpp
- ${IMGUI_DIR}/imgui_widgets.cpp
-)
-IF(NOT EMSCRIPTEN)
- target_compile_definitions(example_glfw_wgpu PUBLIC
- "IMGUI_IMPL_WEBGPU_BACKEND_DAWN"
- )
-endif()
-target_include_directories(example_glfw_wgpu PUBLIC
- ${IMGUI_DIR}
- ${IMGUI_DIR}/backends
-)
-
-target_link_libraries(example_glfw_wgpu PUBLIC ${LIBRARIES})
-
-# Emscripten settings
-if(EMSCRIPTEN)
- if("${IMGUI_EMSCRIPTEN_GLFW3}" STREQUAL "--use-port=contrib.glfw3")
- target_compile_options(example_glfw_wgpu PUBLIC
- "${IMGUI_EMSCRIPTEN_GLFW3}"
- )
- endif()
- message(STATUS "Using ${IMGUI_EMSCRIPTEN_GLFW3} GLFW implementation")
- target_link_options(example_glfw_wgpu PRIVATE
- "-sUSE_WEBGPU=1"
- "${IMGUI_EMSCRIPTEN_GLFW3}"
- "-sWASM=1"
- "-sALLOW_MEMORY_GROWTH=1"
- "-sNO_EXIT_RUNTIME=0"
- "-sASSERTIONS=1"
- "-sDISABLE_EXCEPTION_CATCHING=1"
- "-sNO_FILESYSTEM=1"
- )
- set_target_properties(example_glfw_wgpu PROPERTIES OUTPUT_NAME "index")
- # copy our custom index.html to build directory
- add_custom_command(TARGET example_glfw_wgpu POST_BUILD
- COMMAND ${CMAKE_COMMAND} -E copy_if_different "${CMAKE_CURRENT_LIST_DIR}/web/index.html" $<TARGET_FILE_DIR:example_glfw_wgpu>
- )
-endif()