adding third party libs and defining some early API headers

include/regolith.h

@@ -0,0 +1,82 @@
+/*
+  regolith.h
+  Regolith public API
+  Author: Chris Bell
+  Last edited by: Chris Bell
+  Last edit date: 11-02-2026
+*/
+
+
+
+#ifndef REGOLITH_H
+#define REGOLITH_H
+
+#include <cstddef>
+#include <cstdint>
+
+#if defined(_WIN32) && defined(RG_SHARED)
+  #ifdef RG_BUILD
+    #define RG_API __declspec(dllexport)
+  #else
+    #define RG_API __declspec(dllimport)
+  #endif
+#elif defined(__GNUC__)
+  #define RG_API __attribute__((visibility("default")))
+#else
+  #define RG_API
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define RG_VERSION_STRING "0.0.1"
+
+
+/*
+  TODO: Add documentation comments
+*/
+ 
+enum {
+  RG_LOG_TRACE = 0,
+  RG_LOG_DEBUG,
+  RG_LOG_INFO,
+  RG_LOG_WARN,
+  RG_LOG_ERROR
+};
+
+typedef struct rg_context rg_context;
+
+typedef struct rg_allocator {
+  void* (*alloc)(size_t size, void* user);
+  void* (*realloc)(void* ptr, size_t old_size, size_t new_size, void* user);
+  void* (*free)(void* ptr, size_t size, void* user);
+  void* user;
+} rg_allocator;
+
+typedef void (*rg_log_fn)(int32_t level, const char *message, void *user);
+
+typedef struct rg_config {
+  uint32_t struct_size;
+  rg_allocator allocator;
+  rg_log_fn log;
+  void* log_user;
+  int32_t log_level;
+  int32_t viewport_w;
+  int32_t viewport_h;
+  float display_scale;
+} rg_config;
+
+
+RG_API const char* rg_version(void);
+RG_API void rg_config_init(rg_config* config);
+RG_API rg_context* rg_create(const rg_config* config);
+RG_API void rg_destroy(rg_context* ctx);
+RG_API const char* rg_last_error(const rg_context* ctx);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif