Initial project import

tools/v/examples/tetris/README.md

@@ -0,0 +1,46 @@
+<img src='https://raw.githubusercontent.com/vlang/v/master/examples/tetris/screenshot.png' width=300>
+
+### Dependencies (Ubuntu/Debian)
+```sh
+sudo apt install -y libx11-dev libxi-dev libxcursor-dev libxrandr-dev libgl-dev
+```
+
+## Compiling to JS
+
+```sh
+v -b js_browser examples/tetris/tetris.js.v
+```
+
+And then open `index.html` with your favourite web browser.
+
+
+## Compiling to WASM
+
+1. Install Emscripten from https://emscripten.org/docs/getting_started/downloads.html
+
+2. Make sure that the environment in your shell is setup correctly,
+i.e. that `emcc --version` works.
+```sh
+. /opt/emsdk/emsdk_env.sh
+emcc --version
+```
+
+3. Compile the game to WASM:
+```sh
+v -skip-unused -prod -os wasm32_emscripten examples/tetris/`
+```
+
+4. Copy the generated `tetris` file to `index.js`
+This can be done once. Note that this step will be removed soon, when
+the option `-os wasm32_emscripten` becomes better integrated:
+```sh
+cp examples/tetris/tetris examples/tetris/tetris.js
+```
+
+5. Run/test the game:
+```sh
+emrun examples/tetris/index.html
+```
+
+Once you have run the game, you can make changes,
+then just recompile (step 3), and refresh the game in your browser.