On Monday, 9 September 2024 at 17:15:47 UTC, kinke wrote:
> Oh, I forgot an item:
- Emscripten: The compiler now mimicks a musl Linux platform wrt. extra predefined versions.
This should pave the way for supporting Emscripten in druntime & Phobos (via version(Emscripten) special cases), which is probably much simpler with the musl libc interface than the WASI interface directly.
Thanks! i got SDL + printf working
Follow what's bellow, then browse: http://0.0.0.0:8000/
The process could be simplified imo, but that's a promising start
$ ldc2 -mtriple=wasm32-emscripten-none -L-allow-undefined -relocation-model=pic app.d
$ mkdir dist/
$ emcc -v -O0 -s WASM=1 -s USE_SDL=2 -s USE_SDL_IMAGE=2 -s RELOCATABLE=1 -s ENVIRONMENT=web -o dist/index.html app.o
$ python -m http.server 8000 --directory dist/
import core.stdc.stdio;
__gshared:
SDL_Window* window = null;
SDL_Renderer* renderer = null;
SDL_Surface* screen_surface = null;
SDL_Event* event = null;
bool is_running = true;
extern (C) void main()
{
printf("hello from D\n");
init_game();
}
extern (C) void mainloop()
{
if (!is_running)
{
emscripten_cancel_main_loop();
return;
}
SDL_FillRect(screen_surface, null, 0xFF0000);
SDL_UpdateWindowSurface(window);
}
extern (C) void _start() {} // should not be needed
extern (C) void init_game()
{
if (SDL_Init(SDL_INIT_VIDEO) < 0)
{
fprintf(stderr, "could not initialize sdl2: %s\n", SDL_GetError());
emscripten_cancel_main_loop();
return;
}
window = SDL_CreateWindow("hello_sdl2", SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED, 800, 600, SDL_WINDOW_SHOWN);
if (window == null)
{
fprintf(stderr, "could not create window: %s\n", SDL_GetError());
emscripten_cancel_main_loop();
return;
}
screen_surface = SDL_GetWindowSurface(window);
emscripten_set_main_loop(&mainloop, 0, 1);
}
extern (C)
{
// emscripten API
alias em_callback_func = void function();
void emscripten_set_main_loop(em_callback_func, int, int);
void emscripten_cancel_main_loop();
// SDL
struct SDL_Rect
{
int x, y;
int w, h;
}
alias SDL_Window = void;
alias SDL_Renderer = void;
alias SDL_Event = void;
alias SDL_Surface = void;
enum SDL_INIT_TIMER = 0x00000001u;
enum SDL_INIT_AUDIO = 0x00000010u;
enum SDL_INIT_VIDEO = 0x00000020u;
enum SDL_INIT_JOYSTICK = 0x00000200u;
enum SDL_INIT_HAPTIC = 0x00001000u;
enum SDL_INIT_GAMEPAD = 0x00002000u;
enum SDL_INIT_EVENTS = 0x00004000u;
enum SDL_INIT_SENSOR = 0x00008000u;
enum SDL_INIT_CAMERA = 0x00010000u;
int SDL_Init(uint);
enum SDL_WINDOWPOS_UNDEFINED_MASK = 0x1FFF0000u;
enum SDL_WINDOWPOS_UNDEFINED = SDL_WINDOWPOS_UNDEFINED_MASK | 0;
enum SDL_WINDOW_SHOWN = 0x00000004;
SDL_Window* SDL_CreateWindow(const char* title, int x, int y, int w, int h, uint flags);
SDL_Surface* SDL_GetWindowSurface(SDL_Window*);
int SDL_UpdateWindowSurface(SDL_Window*);
int SDL_FillRect(SDL_Surface*, const(SDL_Rect)* rect, uint color);
const(char)* SDL_GetError();
}
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