Added a font registry, a text rendering helper, and an FPS counter function

src/character.c

@@ -186,7 +186,7 @@ akerr_ErrorContext *character_load_json(char *filename)
 	    );
 	CATCH(errctx, character_load_json_inner(json, obj));
 	CATCH(errctx, get_json_integer_value(json, "movementspeed", (int *)&obj->movementspeed));
-	obj->movementspeed = obj->movementspeed * 1000000;
+	obj->movementspeed = obj->movementspeed * TIME_ONESEC_MS;
 	CATCH(errctx, get_json_number_value(json, "velocity_x", &obj->vx));
 	CATCH(errctx, get_json_number_value(json, "velocity_y", &obj->vy));
     } CLEANUP {

src/game.c

@@ -1,6 +1,7 @@
 #include <SDL3/SDL.h>
 #include <SDL3_image/SDL_image.h>
 #include <SDL3_mixer/SDL_mixer.h>
+#include <SDL3_ttf/SDL_ttf.h>
 #include <stdio.h>
 #include <akerror.h>
 
@@ -32,6 +33,9 @@ akerr_ErrorContext AKERR_NOIGNORE *GAME_init()
     int i = 0;
     PREPARE_ERROR(errctx);
     ATTEMPT {
+	game.gameStartTime = SDL_GetTicksNS();
+	game.lastIterTime = game.gameStartTime;
+	game.lastFPSTime = game.gameStartTime;
 	FAIL_ZERO_BREAK(errctx, strlen((char *)&game.name), AKERR_NULLPOINTER, "Must provide game name");
 	FAIL_ZERO_BREAK(errctx, strlen((char *)&game.version), AKERR_NULLPOINTER, "Must provide game version");
 	FAIL_ZERO_BREAK(errctx, strlen((char *)&game.uri), AKERR_NULLPOINTER, "Must provide game uri");
@@ -40,6 +44,8 @@ akerr_ErrorContext AKERR_NOIGNORE *GAME_init()
 	CATCH(errctx, registry_init_sprite());
 	CATCH(errctx, registry_init_spritesheet());
 	CATCH(errctx, registry_init_character());
+	CATCH(errctx, registry_init_font());
+	CATCH(errctx, registry_init_music());
 	CATCH(errctx, registry_init_actor_state_strings());
     } CLEANUP {
     } PROCESS(errctx) {
@@ -87,9 +93,28 @@ akerr_ErrorContext AKERR_NOIGNORE *GAME_init()
 	"Unable to create mixer device: %s",
 	SDL_GetError());
 
+    FAIL_ZERO_RETURN(
+	errctx,
+	TTF_Init(),
+	AKERR_SDL,
+	"Couldn't initialize front engine: %s",
+	SDL_GetError());
+
     camera.x = 0;
     camera.y = 0;
     camera.w = game.screenwidth;
-    camera.h = game.screenheight;
-    
+    camera.h = game.screenheight;    
+}
+
+void GAME_updateFPS()
+{
+    SDL_Time curTime;
+    curTime = SDL_GetTicksNS();
+    if ( (curTime - game.lastFPSTime) > TIME_ONESEC_NS ) {
+	game.fps = game.framesSinceUpdate;
+	game.framesSinceUpdate = 0;
+	game.lastFPSTime = curTime;
+    }
+    game.framesSinceUpdate += 1;
+    game.lastIterTime = curTime;
 }

src/registry.c

@@ -11,6 +11,8 @@ SDL_PropertiesID REGISTRY_ACTOR_STATE_STRINGS;
 SDL_PropertiesID REGISTRY_SPRITE;
 SDL_PropertiesID REGISTRY_SPRITESHEET;
 SDL_PropertiesID REGISTRY_CHARACTER;
+SDL_PropertiesID REGISTRY_MUSIC;
+SDL_PropertiesID REGISTRY_FONT;
 
 akerr_ErrorContext *registry_init()
 {
@@ -21,6 +23,8 @@ akerr_ErrorContext *registry_init()
 	CATCH(errctx, registry_init_character());
 	CATCH(errctx, registry_init_actor());
 	CATCH(errctx, registry_init_actor_state_strings());
+	CATCH(errctx, registry_init_font());
+	CATCH(errctx, registry_init_music());
     } CLEANUP {
     } PROCESS(errctx) {
     } FINISH(errctx, true);
@@ -35,6 +39,22 @@ akerr_ErrorContext *registry_init_actor()
     SUCCEED_RETURN(errctx);
 }
 
+akerr_ErrorContext AKERR_NOIGNORE *registry_init_font()
+{
+    PREPARE_ERROR(errctx);
+    REGISTRY_FONT = SDL_CreateProperties();
+    FAIL_ZERO_RETURN(errctx, REGISTRY_FONT, AKERR_NULLPOINTER, "Error initializing font registry");
+    SUCCEED_RETURN(errctx);
+}
+
+akerr_ErrorContext *registry_init_music()
+{
+    PREPARE_ERROR(errctx);
+    REGISTRY_MUSIC = SDL_CreateProperties();
+    FAIL_ZERO_RETURN(errctx, REGISTRY_MUSIC, AKERR_NULLPOINTER, "Error initializing music registry");
+    SUCCEED_RETURN(errctx);
+}
+
 akerr_ErrorContext *registry_init_actor_state_strings()
 {
     int i = 0;
@@ -54,7 +74,7 @@ akerr_ErrorContext *registry_init_actor_state_strings()
 
 akerr_ErrorContext *registry_init_sprite()
 {
-    PREPARE_ERROR(errctx);
+     PREPARE_ERROR(errctx);
     REGISTRY_SPRITE = SDL_CreateProperties();
     FAIL_ZERO_RETURN(errctx, REGISTRY_SPRITE, AKERR_NULLPOINTER, "Error initializing sprite registry");
     SUCCEED_RETURN(errctx);

src/sprite.c

@@ -99,7 +99,7 @@ akerr_ErrorContext *sprite_load_json(char *filename)
 	CATCH(errctx, get_json_integer_value((json_t *)json, "width", &obj->width));
 	CATCH(errctx, get_json_integer_value((json_t *)json, "height", &obj->height));
 	CATCH(errctx, get_json_integer_value((json_t *)json, "speed", (int *)&obj->speed));
-	obj->speed = obj->speed * 1000000;
+	obj->speed = obj->speed * TIME_ONESEC_MS;
 	CATCH(errctx, get_json_boolean_value((json_t *)json, "loop", &obj->loop));
 	CATCH(errctx, get_json_boolean_value((json_t *)json, "loopReverse", &obj->loopReverse));