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51 lines
1.5 KiB
Markdown
51 lines
1.5 KiB
Markdown
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# Introduction to SDL with Emscripten
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The easiest way to use SDL is to include it as a subproject in your project.
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We'll start by creating a simple project to build and run [hello.c](hello.c)
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First, you should have the Emscripten SDK installed from:
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https://emscripten.org/docs/getting_started/downloads.html
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Create the file CMakeLists.txt
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```cmake
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cmake_minimum_required(VERSION 3.16)
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project(hello)
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# set the output directory for built objects.
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# This makes sure that the dynamic library goes into the build directory automatically.
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set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/$<CONFIGURATION>")
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set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/$<CONFIGURATION>")
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# This assumes the SDL source is available in vendored/SDL
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add_subdirectory(vendored/SDL EXCLUDE_FROM_ALL)
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# on Web targets, we need CMake to generate a HTML webpage.
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if(EMSCRIPTEN)
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set(CMAKE_EXECUTABLE_SUFFIX ".html" CACHE INTERNAL "")
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endif()
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# Create your game executable target as usual
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add_executable(hello WIN32 hello.c)
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# Link to the actual SDL3 library.
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target_link_libraries(hello PRIVATE SDL3::SDL3)
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```
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Build:
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```sh
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emcmake cmake -S . -B build
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cd build
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emmake make
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```
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You can now run your app by pointing a webserver at your build directory and connecting a web browser to it, opening hello.html
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A more complete example is available at:
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https://github.com/Ravbug/sdl3-sample
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Additional information and troubleshooting is available in [README-emscripten.md](README-emscripten.md)
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