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Abstract the global renderer, physics, camera and gamemap objects behind a pointer, so you can swap in and out different ones as needed

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This commit is contained in:
Andrew Kesterson
2026-06-02 13:15:26 -04:00
parent 941eeb2493
commit 9fed59c4c8
12 changed files with 96 additions and 84 deletions
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78
src/game.c
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@@ -19,17 +19,22 @@
#include <akgl/SDL_GameControllerDB.h>
SDL_Window *window = NULL;
akgl_RenderBackend renderer;
akgl_PhysicsBackend physics;
akgl_Frame ball;
akgl_Frame paddle1;
akgl_Frame paddle2;
akgl_Frame table;
akgl_Tilemap gamemap;
// Currently active objects
akgl_RenderBackend *renderer;
akgl_PhysicsBackend *physics;
SDL_FRect *camera;
akgl_Tilemap *gamemap;
// Default objects
akgl_RenderBackend _akgl_renderer;
akgl_PhysicsBackend _akgl_physics;
SDL_FRect _akgl_camera;
akgl_Tilemap _akgl_gamemap;
MIX_Audio *bgm = NULL;
MIX_Mixer *akgl_mixer = NULL;
MIX_Track *akgl_tracks[AKGL_GAME_AUDIO_MAX_TRACKS];
SDL_FRect camera;
akgl_Game game;
void akgl_game_lowfps(void)
@@ -45,31 +50,26 @@ akerr_ErrorContext AKERR_NOIGNORE *akgl_game_init()
int i = 0;
PREPARE_ERROR(e);
ATTEMPT {
strncpy((char *)&game.libversion, AKGL_VERSION, 32);
game.gameStartTime = SDL_GetTicksNS();
game.lastIterTime = game.gameStartTime;
game.lastFPSTime = game.gameStartTime;
game.lowfpsfunc = &akgl_game_lowfps;
game.statelock = SDL_CreateMutex();
FAIL_ZERO_RETURN(e, game.statelock, AKGL_ERR_SDL, "%s", SDL_GetError());
CATCH(e, akgl_game_state_lock());
FAIL_ZERO_BREAK(e, strlen((char *)&game.name), AKERR_NULLPOINTER, "Must provide game name");
FAIL_ZERO_BREAK(e, strlen((char *)&game.version), AKERR_NULLPOINTER, "Must provide game version");
FAIL_ZERO_BREAK(e, strlen((char *)&game.uri), AKERR_NULLPOINTER, "Must provide game uri");
CATCH(e, akgl_heap_init());
CATCH(e, akgl_registry_init_actor());
CATCH(e, akgl_registry_init_sprite());
CATCH(e, akgl_registry_init_spritesheet());
CATCH(e, akgl_registry_init_character());
CATCH(e, akgl_registry_init_font());
CATCH(e, akgl_registry_init_music());
CATCH(e, akgl_registry_init_properties());
CATCH(e, akgl_registry_init_actor_state_strings());
} CLEANUP {
//IGNORE(akgl_game_state_unlock());
} PROCESS(e) {
} FINISH(e, true)
strncpy((char *)&game.libversion, AKGL_VERSION, 32);
game.gameStartTime = SDL_GetTicksNS();
game.lastIterTime = game.gameStartTime;
game.lastFPSTime = game.gameStartTime;
game.lowfpsfunc = &akgl_game_lowfps;
game.statelock = SDL_CreateMutex();
FAIL_ZERO_RETURN(e, game.statelock, AKGL_ERR_SDL, "%s", SDL_GetError());
PASS(e, akgl_game_state_lock());
FAIL_ZERO_RETURN(e, strlen((char *)&game.name), AKERR_NULLPOINTER, "Must provide game name");
FAIL_ZERO_RETURN(e, strlen((char *)&game.version), AKERR_NULLPOINTER, "Must provide game version");
FAIL_ZERO_RETURN(e, strlen((char *)&game.uri), AKERR_NULLPOINTER, "Must provide game uri");
PASS(e, akgl_heap_init());
PASS(e, akgl_registry_init_actor());
PASS(e, akgl_registry_init_sprite());
PASS(e, akgl_registry_init_spritesheet());
PASS(e, akgl_registry_init_character());
PASS(e, akgl_registry_init_font());
PASS(e, akgl_registry_init_music());
PASS(e, akgl_registry_init_properties());
PASS(e, akgl_registry_init_actor_state_strings());
SDL_SetAppMetadata(game.name, game.version, game.uri);
@@ -113,6 +113,12 @@ akerr_ErrorContext AKERR_NOIGNORE *akgl_game_init()
AKGL_ERR_SDL,
"Couldn't initialize front engine: %s",
SDL_GetError());
camera = &_akgl_camera;
renderer = &_akgl_renderer;
physics = &_akgl_physics;
gamemap = &_akgl_gamemap;
PASS(e, akgl_game_state_unlock());
SUCCEED_RETURN(e);
}
@@ -432,15 +438,15 @@ akerr_ErrorContext AKERR_NOIGNORE *akgl_game_update(akgl_Iterator *opflags)
continue;
}
if ( AKGL_BITMASK_HAS(opflags->flags, AKGL_ITERATOR_OP_TILEMAPSCALE) ) {
PASS(e, akgl_tilemap_scale_actor(&gamemap, actor));
PASS(e, akgl_tilemap_scale_actor(gamemap, actor));
} else {
actor->scale = 1.0;
}
PASS(e, actor->updatefunc(actor));
}
}
PASS(e, physics.simulate(&physics, NULL));
PASS(e, renderer.draw_world(&renderer, NULL));
PASS(e, physics->simulate(physics, NULL));
PASS(e, renderer->draw_world(renderer, NULL));
PASS(e, akgl_game_state_unlock());
SUCCEED_RETURN(e);
}