Raylibd

raylibd hot-reloads c raylib programs

install

Get ghc-9.6.7 and cabal-install 3.14.1.1 or similar from https://www.haskell.org/ghcup/install/

git clone https://github.com/aavogt/raylibd
cd raylibd
cabal install

use

raylibd init my_app -i 10 # use example init/10-*
cd my_app
make -j12 # downloads raygui&raylib (if missing) into vendor/raylib/, and runs main_hot

The my_app is then a minimal fragment shader example:

  my_app
  ├── 10-tint.fs
  ├── compile_commands.json  # for clangd
  ├── dll.c
  ├── dll.so
  ├── main.c
  ├── main_hot
  ├── main_hot.c
  ├── Makefile
  └── vendor
      ├── Makefile
      └── raygui.h

The default make watch target calls raylibd to turn main.c into dll.c. main_hot loads the dll.so which knows how to reload assets (including shaders), and to migrate state. Save changes to main.c or 10-tint.fs and you should be able to see the effects right away.

TODO

• remove unused original variable declarations copied into dll.c

• #line pragmas

• nested arrays could reuse more space?

  struct state { int nframe; int n; int m; int x; int xs[12][2];

  }; struct prevstate { int nframe; int n; int m; int x; int dummy0[12][2]; int dummy1[13][2]; int xs[14][2];

  };

• nix build .#wasm; cd result/www; emrun myapp.html works but maybe Makefiles could work inside nix shell nix develop etc.

• LoadFontEx, LoadAudioStream take extra arguments to be stored in AssetSlot

• rewriteAssetLoads is wrong with Shader sh[2] = { LoadShader(vs, fs); } ;

• hpc coverage

• integration tests

• deleted structs are used but not defined in the generated code

• name anonymous structs

  dll.c: In function ‘ReinitAlloc’:
  dll.c:284:19: error: incompatible types when assigning to type ‘struct <anonymous>’ from type ‘struct <anonymous>’
    284 |     t->entities = s->entities;
  
  struct {
    float x[NSTORE];
    float *y, *z;
  } store;
  
  vs the workaround:
  typedef struct { float x[NSTORE]; } Store;
  Store store;