LWJGL 3 Utility Bindings: Memory, Compression, Tools

// Decode a PNG file to raw RGBA pixels
long ctx = LibSPNG.spng_ctx_new(0);
try (MemoryStack stack = MemoryStack.stackPush()) {
    // set PNG data source (ByteBuffer), decode to SPNG_FMT_RGBA8
    IntBuffer widthBuf = stack.mallocInt(1);
    IntBuffer heightBuf = stack.mallocInt(1);
    // ... spng_set_png_buffer, spng_get_ihdr, spng_decode_image ...
} finally {
    LibSPNG.spng_ctx_free(ctx);
}

// Open an environment and put/get a value
long env = LMDB.mdb_env_create();
LMDB.mdb_env_open(env, "/tmp/testdb", 0, 0664);

long txn = LMDB.mdb_txn_begin(env, NULL, 0);
IntBuffer dbi = stack.mallocInt(1);
LMDB.mdb_dbi_open(txn, (String) null, 0, dbi);

MDBVal key = MDBVal.malloc(stack).mv_data(stack.UTF8("hello"));
MDBVal val = MDBVal.malloc(stack).mv_data(stack.UTF8("world"));
LMDB.mdb_put(txn, dbi.get(0), key, val, 0);
LMDB.mdb_txn_commit(txn);

// Initialize and instrument CPU work
Remotery._rmt_Settings settings = Remotery._rmt_Settings.create();
long rmt = Remotery.rmt_CreateGlobalInstance();
// Wrap sections with rmt_BeginCPUSample / rmt_EndCPUSample
// Then open http://localhost:17815 in a browser to view the timeline
Remotery.rmt_DestroyGlobalInstance(rmt);

// Load the RenderDoc API at startup
RenderDocAPI api = RenderDoc.RENDERDOC_GetAPI();
// Trigger a frame capture programmatically
api.TriggerCapture();
// Launch the UI
api.LaunchReplayUI(1, null);

long topology = HWLoc.hwloc_topology_init();
HWLoc.hwloc_topology_load(topology);

// Walk the topology tree
long root = HWLoc.hwloc_get_root_obj(topology);
int depth = HWLoc.hwloc_get_type_depth(topology, HWLoc.HWLOC_OBJ_CORE);
int nCores = HWLoc.hwloc_get_nbobjs_by_depth(topology, depth);
System.out.println("Physical cores: " + nCores);

HWLoc.hwloc_topology_destroy(topology);