major gfx refactor

src/gfx/pxl8_shader_runtime.c

@@ -0,0 +1,66 @@
+#include "pxl8_shader_runtime.h"
+#include "pxl8_log.h"
+
+#include <dlfcn.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct pxl8_shader_lib {
+    void* handle;
+    char path[256];
+};
+
+pxl8_shader_lib* pxl8_shader_lib_load(const char* path) {
+    void* handle = dlopen(path, RTLD_NOW);
+    if (!handle) {
+        pxl8_error("Failed to load shader library: %s - %s", path, dlerror());
+        return NULL;
+    }
+
+    pxl8_shader_lib* lib = malloc(sizeof(pxl8_shader_lib));
+    lib->handle = handle;
+    strncpy(lib->path, path, sizeof(lib->path) - 1);
+    lib->path[sizeof(lib->path) - 1] = '\0';
+
+    return lib;
+}
+
+void pxl8_shader_lib_unload(pxl8_shader_lib* lib) {
+    if (!lib) return;
+    if (lib->handle) {
+        dlclose(lib->handle);
+    }
+    free(lib);
+}
+
+bool pxl8_shader_lib_reload(pxl8_shader_lib* lib) {
+    if (!lib) return false;
+
+    if (lib->handle) {
+        dlclose(lib->handle);
+    }
+
+    lib->handle = dlopen(lib->path, RTLD_NOW);
+    if (!lib->handle) {
+        pxl8_error("Failed to reload shader library: %s - %s", lib->path, dlerror());
+        return false;
+    }
+
+    return true;
+}
+
+pxl8_shader_fn pxl8_shader_lib_get(pxl8_shader_lib* lib, const char* name) {
+    if (!lib || !lib->handle) return NULL;
+
+    char symbol[128];
+    snprintf(symbol, sizeof(symbol), "pxl8_shader_%s", name);
+
+    void* fn = dlsym(lib->handle, symbol);
+    if (!fn) {
+        pxl8_error("Failed to find shader: %s - %s", symbol, dlerror());
+        return NULL;
+    }
+
+    return (pxl8_shader_fn)fn;
+}