More work to drivers

- Add gfx_test
- add texture loading to GfxOpenGL
- add full submit code
- add debug logging
- add construct and destroy functionality to Pool
- add command functionality
- add vertex and index pools to lithium (static and not threadsafe yet)
- Update GfxDriver Matrix with SetViewPort
- Add glfw (only dependency of gfx_test) maybe later required for input driver

source/lithium/pools.cpp

@@ -0,0 +1,26 @@
+#include <pd/lithium/pools.hpp>
+
+#include "pd/common.hpp"
+#include "pd/core/pool.hpp"
+#include "pd/lithium/vertex.hpp"
+
+namespace PD {
+namespace Li {
+PD::Pool<Vertex> pVtxPool;
+PD::Pool<u16> pIdxPool;
+
+void InitPools(size_t max_vertices) {
+  pVtxPool.Init(max_vertices);
+  pIdxPool.Init(max_vertices * 2);
+}
+
+Vertex* AllocateVertices(size_t count) { return pVtxPool.Allocate(count); }
+
+u16* AllocateIndices(size_t count) { return pIdxPool.Allocate(count); }
+
+void ResetPools() {
+  pVtxPool.Reset();
+  pIdxPool.Reset();
+}
+}  // namespace Li
+}  // namespace PD