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

include/pd/lithium/command.hpp

@@ -1,24 +1,61 @@
 #pragma once
 
+#include <cstddef>
 #include <pd/core/pool.hpp>
+#include <pd/lithium/pools.hpp>
 #include <pd/lithium/vertex.hpp>
 
 namespace PD {
 namespace Li {
 class Command {
  public:
-  Command() {}
+  Command() { Reset(); }
   ~Command() {}
 
+  void Reserve(size_t vtx, size_t idx) {
+    if (!FirstVertex)
+      FirstVertex = AllocateVertices(vtx);
+    else
+      AllocateVertices(vtx);
+    if (!FirstIndex)
+      FirstIndex = AllocateIndices(idx);
+    else
+      AllocateIndices(idx);
+  }
+
+  void Reset() {
+    Layer = 0;
+    Tex = 0;
+    FirstIndex = nullptr;
+    FirstVertex = nullptr;
+    IndexCount = 0;
+    VertexCount = 0;
+  }
+
+  Command& Add(const Vertex& vtx) {
+    FirstVertex[VertexCount++] = vtx;
+    return *this;
+  }
+  Command& Add(u16 idx) {
+    FirstIndex[IndexCount++] = VertexCount + idx;
+    return *this;
+  }
+  Command& Add(u16 a, u16 b, u16 c) {
+    FirstIndex[IndexCount++] = VertexCount + a;
+    FirstIndex[IndexCount++] = VertexCount + b;
+    FirstIndex[IndexCount++] = VertexCount + c;
+    return *this;
+  }
+
   int Layer = 0;
   ptr Tex = 0;
   Vertex* FirstVertex = nullptr;
   u16* FirstIndex = nullptr;
-  size_t VertexCount;
-  size_t IndexCount;
-  
-  PD::Pool<Vertex>* pVpool;
-  PD::Pool<u16>* pIpool;
+  size_t VertexCount = 0;
+  size_t IndexCount = 0;
+  // Todo: implement
+  size_t VertexCountMax = 0;
+  size_t IndexCountMax = 0;
 };
 }  // namespace Li
 }  // namespace PD