From 762d165cd14f0d4423c2de6f7f1659f7b36a4fd3 Mon Sep 17 00:00:00 2001
From: Sara <sara@objectionable.solutions>
Date: Mon, 27 Oct 2025 21:41:45 +0100
Subject: [PATCH] feat: added external resource management

---
 resources.cpp | 49 ++++++++++++++++++++++++++++++++++++++++++++++---
 resources.h   | 16 +++++++++++++++-
 2 files changed, 61 insertions(+), 4 deletions(-)

diff --git a/resources.cpp b/resources.cpp
index 2798d80..8e6cf05 100644
--- a/resources.cpp
+++ b/resources.cpp
@@ -4,18 +4,34 @@
 #include <SDL3/SDL_log.h>
 #include <SDL3/SDL_render.h>
 #include <SDL3_image/SDL_image.h>
+#include <cstddef>
+
+#ifndef CERA_RESOURCE_REGISTRY_SIZE
+#define CERA_RESOURCE_REGISTRY_SIZE 64
+#endif
 
 namespace cera {
+struct ResourceRegistry {
+	void *data;
+	DestructorFn destructor;
+};
+
 TTF_Font *defaultFont[FONT_MAX];
 TTF_TextEngine *textEngine = nullptr;
 
+ResourceRegistry resources[CERA_RESOURCE_REGISTRY_SIZE]{};
+size_t usedResources{0};
+
 void SetDefaultFont(char const *path) {
-	defaultFont[FONT_DEFAULT] = TTF_OpenFont(path, cera::baseFontSize * 5);
-	if (defaultFont[FONT_DEFAULT] == nullptr) {
+	// LOAD REGULAR FONT
+	defaultFont[FONT_REGULAR] = TTF_OpenFont(path, cera::baseFontSize * 5);
+	if (defaultFont[FONT_REGULAR] == nullptr) {
 		SDL_LogError(SDL_LOG_CATEGORY_ERROR, "TTF_OpenFont failed: Failed to load default font '%s': %s", path, SDL_GetError());
 		exit(6);
 	}
-	TTF_SetFontHinting(defaultFont[FONT_DEFAULT], TTF_HINTING_LIGHT_SUBPIXEL);
+	TTF_SetFontHinting(defaultFont[FONT_REGULAR], TTF_HINTING_LIGHT_SUBPIXEL);
+	StoreResource(defaultFont[FONT_REGULAR], (DestructorFn)&TTF_CloseFont);
+	// LOAD BOLD FONT
 	defaultFont[FONT_BOLD] = TTF_OpenFont(path, cera::baseFontSize * 5);
 	if (defaultFont[FONT_BOLD] == nullptr) {
 		SDL_LogError(SDL_LOG_CATEGORY_ERROR, "TTF_OpenFont failed: Failed to load default bold font '%s': %s", path, SDL_GetError());
@@ -23,6 +39,33 @@ void SetDefaultFont(char const *path) {
 	}
 	TTF_SetFontHinting(defaultFont[FONT_BOLD], TTF_HINTING_LIGHT_SUBPIXEL);
 	TTF_SetFontStyle(defaultFont[FONT_BOLD], TTF_STYLE_BOLD);
+	StoreResource(defaultFont[FONT_BOLD], (DestructorFn)&TTF_CloseFont);
 	SDL_Log("SetDefaultFont: Success");
 }
+
+void StoreResource(void *data, DestructorFn destructor) {
+	for (size_t i{0}; i < usedResources; ++i) {
+		if(resources[i].data == nullptr) {
+			resources[i].data = data;
+			resources[i].destructor = destructor;
+			return;
+		}
+	}
+	if(usedResources < CERA_RESOURCE_REGISTRY_SIZE) {
+		resources[usedResources].data = data;
+		resources[usedResources].destructor = destructor;
+		++usedResources;
+		return;
+	}
+	SDL_LogError(SDL_LOG_CATEGORY_ERROR, "Failed to register resource, expect memory leaks. Consider using less resources or defining a higher CERA_RESOURCE_REGISTRY_SIZE at compile time");
+}
+
+void CleanupResources() {
+	for (size_t i{0}; i < usedResources; ++i) {
+		if(resources[i].data) {
+			resources[i].destructor(resources[i].data);
+		}
+	}
+	usedResources = 0;
+}
 }
diff --git a/resources.h b/resources.h
index 3adc3cf..4d649ca 100644
--- a/resources.h
+++ b/resources.h
@@ -1,11 +1,13 @@
 #ifndef RESOURCES_H
 #define RESOURCES_H
 
+#include "SDL3/SDL_render.h"
+#include <SDL3_image/SDL_image.h>
 #include <SDL3_ttf/SDL_ttf.h>
 
 namespace cera {
 enum Font {
-	FONT_DEFAULT = 0,
+	FONT_REGULAR = 0,
 	FONT_BOLD = 1,
 	FONT_MAX
 };
@@ -13,7 +15,19 @@ enum Font {
 extern TTF_TextEngine *textEngine;
 extern TTF_Font *defaultFont[FONT_MAX];
 
+typedef void (*DestructorFn)(void* data);
+
 void SetDefaultFont(char const *path);
+void StoreResource(void *data, DestructorFn destructor);
+void CleanupResources();
+
+static inline SDL_Texture *LoadAndStoreTexture(SDL_Renderer *renderer, char const *path) {
+	if(SDL_Texture *texture{IMG_LoadTexture(renderer, path)}) {
+		StoreResource(texture, (DestructorFn)&SDL_DestroyTexture);
+		return texture;
+	}
+	return nullptr;
+}
 }
 
 #endif // !RESOURCES_H