diff --git a/.gitmodules b/.gitmodules
index 07177a9..d848d52 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "vendor/stb"]
 	path = vendor/stb
 	url = https://github.com/nothings/stb.git
+[submodule "vendor/glfw"]
+	path = vendor/glfw
+	url = https://github.com/glfw/glfw.git
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f791c41..cc0bfb7 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,89 +14,110 @@ option(PD_BUILD_SHARED "Build Shared Library" OFF)
 option(PD_BUILD_TOOLS "Build Palladium Tools" OFF)
 
 if(${PD_BUILD_TOOLS})
-    add_subdirectory(tools)
+	add_subdirectory(tools)
 endif()
 
 add_subdirectory(vendor)
 
 # # Include Library Source
 set(PD_SOURCES
+	# Common
+	source/common.cpp
 
-    # Core
-    source/core/bits.cpp
-    source/core/color.cpp
-    source/core/mat.cpp
-    source/core/strings.cpp
+	# Core
+	source/core/bits.cpp
+	source/core/color.cpp
+	source/core/mat.cpp
+	source/core/strings.cpp
 
-    source/drivers/os.cpp
-    source/drivers/gfx.cpp
+	# Drivers
+	source/drivers/os.cpp
+	source/drivers/gfx.cpp
+
+	# Lithium
+	source/lithium/pools.cpp
 )
 
 if(${PD_BUILD_SHARED})
-    add_library(palladium SHARED ${PD_SOURCES})
-    target_compile_definitions(palladium PRIVATE -DPD_BUILD_SHARED)
+	add_library(palladium SHARED ${PD_SOURCES})
+	target_compile_definitions(palladium PRIVATE -DPD_BUILD_SHARED)
 else()
-    add_library(palladium STATIC ${PD_SOURCES})
-    target_compile_definitions(palladium PUBLIC -DPD_BUILD_STATIC)
+	add_library(palladium STATIC ${PD_SOURCES})
+	target_compile_definitions(palladium PUBLIC -DPD_BUILD_STATIC)
 endif()
 
+target_compile_definitions(palladium PUBLIC -DPD_DEBUG=1)
+target_compile_options(palladium
+	PUBLIC
+		-fmacro-prefix-map=${CMAKE_CURRENT_SOURCE_DIR}/source=source
+		-fmacro-prefix-map=${CMAKE_CURRENT_SOURCE_DIR}/include=include
+)
+
 add_library(palladium::palladium ALIAS palladium)
 
 target_include_directories(palladium
-    PUBLIC
-    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
-    $<INSTALL_INTERFACE:include>
+	PUBLIC
+		$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+		$<INSTALL_INTERFACE:include>
 )
 
-target_compile_options(palladium PRIVATE
-    $<$<CONFIG:Debug>:-O0 -g>
-    $<$<CONFIG:Release>:-O3>
+target_compile_options(palladium
+	PRIVATE
+		$<$<CONFIG:Debug>:-O0 -g>
+		$<$<CONFIG:Release>:-O3>
 )
 
-install(TARGETS palladium
-    EXPORT palladiumTargets
-    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+install(
+	TARGETS palladium
+	EXPORT palladiumTargets
+	ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+	LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+	RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
 )
-install(DIRECTORY include/
-    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+install(
+	DIRECTORY include/
+	DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
 )
 install(EXPORT palladiumTargets
-    FILE palladiumTargets.cmake
-    NAMESPACE palladium::
-    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/palladium
+	FILE palladiumTargets.cmake
+	NAMESPACE palladium::
+	DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/palladium
 )
 
 include(CMakePackageConfigHelpers)
 configure_package_config_file(
-    cmake/palladiumConfig.cmake.in
-    ${CMAKE_CURRENT_BINARY_DIR}/palladiumConfig.cmake
-    INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/palladium
+	cmake/palladiumConfig.cmake.in
+	${CMAKE_CURRENT_BINARY_DIR}/palladiumConfig.cmake
+	INSTALL_DESTINATION
+	${CMAKE_INSTALL_LIBDIR}/cmake/palladium
 )
 
 write_basic_package_version_file(
-    ${CMAKE_CURRENT_BINARY_DIR}/palladiumConfigVersion.cmake
-    VERSION ${PROJECT_VERSION}
-    COMPATIBILITY SameMajorVersion
+	${CMAKE_CURRENT_BINARY_DIR}/palladiumConfigVersion.cmake
+	VERSION
+	${PROJECT_VERSION}
+	COMPATIBILITY
+	SameMajorVersion
 )
 
-install(FILES
-    ${CMAKE_CURRENT_BINARY_DIR}/palladiumConfig.cmake
-    ${CMAKE_CURRENT_BINARY_DIR}/palladiumConfigVersion.cmake
-    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/palladium
+install(
+	FILES
+		${CMAKE_CURRENT_BINARY_DIR}/palladiumConfig.cmake
+		${CMAKE_CURRENT_BINARY_DIR}/palladiumConfigVersion.cmake
+	DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/palladium
 )
 
 find_program(CLANG_FORMAT clang-format)
 
-file(GLOB_RECURSE PD_FMTFILES CONFIGURE_DEPENDS
-    ${CMAKE_CURRENT_SOURCE_DIR}/source/*.cpp
-    ${CMAKE_CURRENT_SOURCE_DIR}/include/*.hpp
+file(GLOB_RECURSE PD_FMTFILES
+	CONFIGURE_DEPENDS
+	${CMAKE_CURRENT_SOURCE_DIR}/source/*.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/include/*.hpp
 )
 
 add_custom_target(pd-clang-format
-    COMMAND ${CLANG_FORMAT} --style=file -i ${PD_FMTFILES}
-    COMMENT "Formatting Project Sources"
+	COMMAND ${CLANG_FORMAT} --style=file -i ${PD_FMTFILES}
+	COMMENT "Formatting Project Sources"
 )
 
 add_subdirectory(backends)
diff --git a/backends/CMakeLists.txt b/backends/CMakeLists.txt
index 890755b..f0e7d6e 100644
--- a/backends/CMakeLists.txt
+++ b/backends/CMakeLists.txt
@@ -7,15 +7,23 @@ option(PD_ENABLE_OPENGL3 "Enable OpenGL 3.3 (On Supported Hardware)" ON)
 option(PD_ENABLE_VULKAN "Not implemented yet" OFF)
 
 add_library(pd-system STATIC
-    ${CMAKE_CURRENT_SOURCE_DIR}/source/gfx_opengl.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/source/gfx_opengl.cpp
 )
+
 target_include_directories(pd-system
-    PUBLIC
-    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
-    $<INSTALL_INTERFACE:include>
+	PUBLIC
+		$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+		$<INSTALL_INTERFACE:include>
 )
+
+target_compile_options(pd-system
+	PUBLIC
+		-fmacro-prefix-map=${CMAKE_CURRENT_SOURCE_DIR}/source=source
+		-fmacro-prefix-map=${CMAKE_CURRENT_SOURCE_DIR}/include=include
+)
+
 target_link_libraries(pd-system
-    PUBLIC
-    palladium::palladium
-    glad
+	PUBLIC
+		palladium::palladium
+		glad
 )
\ No newline at end of file
diff --git a/backends/include/gfx_opengl.hpp b/backends/include/gfx_opengl.hpp
index b2aa851..4b48698 100644
--- a/backends/include/gfx_opengl.hpp
+++ b/backends/include/gfx_opengl.hpp
@@ -17,7 +17,7 @@ struct GfxOpenGLConfig {
 };
 class GfxOpenGL : public GfxDriverBase<GfxOpenGLConfig> {
  public:
-  GfxOpenGL() {}
+  GfxOpenGL(): GfxDriverBase("OpenGL2") {}
   ~GfxOpenGL() {}
 
   void SysInit() override;
diff --git a/backends/source/gfx_opengl.cpp b/backends/source/gfx_opengl.cpp
index d09befc..5e525a9 100644
--- a/backends/source/gfx_opengl.cpp
+++ b/backends/source/gfx_opengl.cpp
@@ -2,6 +2,9 @@
 
 #include <gfx_opengl.hpp>
 
+#include "pd/common.hpp"
+#include "pd/drivers/gfx.hpp"
+
 namespace PD {
 GLuint compileShader(const std::string& source, GLenum type) {
   GLuint shader = glCreateShader(type);
@@ -42,6 +45,8 @@ GLuint createShaderProgram(const std::string& vertexShaderSource,
   glDeleteShader(vertexShader);
   glDeleteShader(fragmentShader);
 
+  if (success) PDLOG("Shader [{}] compiled sucessfully", shaderProgram);
+
   return shaderProgram;
 }
 
@@ -118,16 +123,36 @@ void GfxOpenGL::SysInit() {
 
   glBindBuffer(GL_ARRAY_BUFFER, 0);
   glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+  PDLOG(
+      "GfxOpenGL::SysInit():\n  pShader = {}\n  pLocTex = {}\n  pLocAlfa = "
+      "{}\n  pLocProjection = {}\n  VBO = {}\n  IBO = {}",
+      pShader, pLocTex, pLocAlfa, pLocProjection, VBO, IBO);
 }
 
 void GfxOpenGL::SysDeinit() {
   glDeleteBuffers(1, &VBO);
   glDeleteBuffers(1, &IBO);
+  PDLOG("GfxOpenGL::SysDeinit()");
 }
 
 void GfxOpenGL::Submit(size_t count, size_t start) {
+  BindTexture(CurrentTex);
+  glUseProgram(pShader);
+  pSetupShaderAttribs(pShader);
+  glUniformMatrix4fv(pLocProjection, 1, GL_FALSE, Projection.m.data());
+  glBindBuffer(GL_ARRAY_BUFFER, VBO);
+  glBufferData(GL_ARRAY_BUFFER, CurrentVertex * sizeof(PD::Li::Vertex),
+               GetVertexBufPtr(0), GL_DYNAMIC_DRAW);
+
+  glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, IBO);
+  glBufferData(GL_ELEMENT_ARRAY_BUFFER, CurrentIndex * sizeof(PD::u16),
+               GetIndexBufPtr(0), GL_DYNAMIC_DRAW);
+
   glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_INT,
-                 (void*)GetIndexBufPtr(start));
+                 reinterpret_cast<void*>(start * sizeof(u16)));
+  glBindBuffer(GL_ARRAY_BUFFER, 0);
+  glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+  BindTexture(0);
 }
 
 void GfxOpenGL::BindTexture(TextureID id) {
@@ -139,12 +164,37 @@ void GfxOpenGL::BindTexture(TextureID id) {
   glUniform1i(pLocAlfa, fmt == GL_ALPHA);
 }
 
-void GfxOpenGL::SysReset() {}
+void GfxOpenGL::SysReset() {
+  glEnable(GL_BLEND);
+  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+}
 
 TextureID GfxOpenGL::LoadTexture(const std::vector<PD::u8>& pixels, int w,
                                  int h, TextureFormat type,
                                  TextureFilter filter) {
-  return 0;
+  GLuint texID;
+  glGenTextures(1, &texID);
+  glBindTexture(GL_TEXTURE_2D, texID);
+
+  // Set base format (Always using RGBA as base)
+  GLenum fmt = GL_RGBA;
+  /*if (type == PD::Li::Texture::Type::RGB24) {
+    fmt = GL_RGB;
+  } else if (type == PD::Li::Texture::Type::A8) {
+    fmt = GL_ALPHA;
+  }*/
+  glTexImage2D(GL_TEXTURE_2D, 0, fmt, w, h, 0, fmt, GL_UNSIGNED_BYTE,
+               pixels.data());
+  if (filter == TextureFilter::Linear) {
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+  } else if (filter == TextureFilter::Nearest) {
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+  }
+  glBindTexture(GL_TEXTURE_2D, 0);
+  PDLOG("GfxOpenGL::LoadTexture -> [{}] {}", PD::ivec2(w, h), texID);
+  return texID;
 }
 
 void GfxOpenGL::DeleteTexture(const TextureID& tex) {
diff --git a/include/palladium b/include/palladium
index 90b9605..7b93830 100755
--- a/include/palladium
+++ b/include/palladium
@@ -24,4 +24,5 @@ SOFTWARE.
  */
 
 #include <pd/core/core.hpp>
-#include <pd/drivers/drivers.hpp>
\ No newline at end of file
+#include <pd/drivers/drivers.hpp>
+#include <pd/lithium/lithium.hpp>
\ No newline at end of file
diff --git a/include/pd/common.hpp b/include/pd/common.hpp
index 11cf40f..4635fde 100644
--- a/include/pd/common.hpp
+++ b/include/pd/common.hpp
@@ -25,6 +25,7 @@ SOFTWARE.
 
 #include <chrono>
 #include <cmath>
+#include <cstddef>
 #include <exception>
 #include <format>
 #include <fstream>
@@ -42,4 +43,17 @@ using u16 = unsigned short;
 using u32 = unsigned int;
 using u64 = unsigned long long;
 using ptr = uintptr_t;
-}  // namespace PD
\ No newline at end of file
+void Log(const std::string& txt);
+template <typename... Args>
+void Log(std::format_string<Args...> fmt, Args&&... args) {
+  std::string msg = std::format(fmt, std::forward<Args>(args)...);
+  Log(msg);
+}
+}  // namespace PD
+
+#ifdef PD_DEBUG
+#define PDLOG(fmt, ...) \
+  PD::Log("[{}:{}]: " fmt, __FILE__, __LINE__, ##__VA_ARGS__)
+#else
+#define PDLOG(fmt, ...)
+#endif
\ No newline at end of file
diff --git a/include/pd/core/pool.hpp b/include/pd/core/pool.hpp
index 609148c..9ad6a2a 100644
--- a/include/pd/core/pool.hpp
+++ b/include/pd/core/pool.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <iostream>
+#include <memory>
 #include <pd/common.hpp>
 namespace PD {
 template <typename T, typename Alloc = std::allocator<T>>
@@ -24,6 +25,10 @@ class Pool {
     pPos = 0;
     pCap = size;
     pData = pAlloc.allocate(size);
+    for (size_t i = 0; i < pCap; i++) {
+      std::allocator_traits<Alloc>::construct(pAlloc, &pData[i]);
+    }
+    PDLOG("Pool::Init({})", size);
   }
 
   Pool(const Pool&) = delete;
@@ -49,7 +54,15 @@ class Pool {
     return false;
   }
 
-  void Reset() { pPos = 0; }
+  void Reset() {
+    for (size_t i = 0; i < pCap; i++) {
+      std::allocator_traits<Alloc>::destroy(pAlloc, &pData[i]);
+    }
+    pPos = 0;
+    for (size_t i = 0; i < pCap; i++) {
+      std::allocator_traits<Alloc>::construct(pAlloc, &pData[i]);
+    }
+  }
 
   size_t size() const { return pPos; }
   size_t capacity() const { return pCap; }
diff --git a/include/pd/drivers/gfx.hpp b/include/pd/drivers/gfx.hpp
index 1a06956..bbc0920 100755
--- a/include/pd/drivers/gfx.hpp
+++ b/include/pd/drivers/gfx.hpp
@@ -29,6 +29,7 @@ class PD_API GfxDriver : public DriverInterface {
   virtual ~GfxDriver() = default;
 
   virtual void Init() {}
+  virtual void Deinit() { SysDeinit(); }
 
   void SetViewPort(const ivec2& size);
   void SetViewPort(int x, int y);
@@ -93,7 +94,6 @@ class PD_API GfxDriverBase : public GfxDriver {
 
   void Draw(const Pool<Li::Command>& commands) override {
     CountCommands += commands.size();
-    Projection = Mat4::Ortho(0.f, ViewPort.x, ViewPort.y, 0.f, 1.f, -1.f);
     size_t index = 0;
     while (index < commands.size()) {
       CurrentTex = commands[index].Tex;
@@ -144,6 +144,22 @@ class PD_API Gfx {
     driver = std::make_unique<T>(std::forward<Args>(args)...);
   }
 
+  static void Init() { driver->Init(); }
+  static void Deinit() { driver->Deinit(); }
+  static void SetViewPort(const ivec2& vp) { driver->SetViewPort(vp); }
+  static void SetViewPort(int w, int h) { driver->SetViewPort(w, h); }
+  static void Reset() { driver->Reset(); }
+  static void Draw(const Pool<Li::Command>& commands) {
+    driver->Draw(commands);
+  }
+  static TextureID LoadTexture(const std::vector<PD::u8>& pixels, int w, int h,
+                               TextureFormat type = TextureFormat::RGBA32,
+                               TextureFilter filter = TextureFilter::Linear) {
+    return driver->LoadTexture(pixels, w, h, type, filter);
+  }
+
+  static const char* GetDriverName() { return driver->GetName(); }
+
  private:
   static std::unique_ptr<GfxDriver> driver;
 };
diff --git a/include/pd/lithium/command.hpp b/include/pd/lithium/command.hpp
index 818f937..825bd88 100644
--- a/include/pd/lithium/command.hpp
+++ b/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
\ No newline at end of file
diff --git a/include/pd/lithium/lithium.hpp b/include/pd/lithium/lithium.hpp
new file mode 100644
index 0000000..73e316e
--- /dev/null
+++ b/include/pd/lithium/lithium.hpp
@@ -0,0 +1,5 @@
+#pragma once
+
+#include <pd/lithium/command.hpp>
+#include <pd/lithium/pools.hpp>
+#include <pd/lithium/vertex.hpp>
\ No newline at end of file
diff --git a/include/pd/lithium/pools.hpp b/include/pd/lithium/pools.hpp
new file mode 100644
index 0000000..da82cfd
--- /dev/null
+++ b/include/pd/lithium/pools.hpp
@@ -0,0 +1,12 @@
+#pragma once
+
+#include <cstddef>
+#include <pd/lithium/vertex.hpp>
+
+namespace PD {
+namespace Li {
+void InitPools(size_t max_vertices = 32768);
+Vertex* AllocateVertices(size_t count);
+u16* AllocateIndices(size_t count);
+}  // namespace Li
+}  // namespace PD
\ No newline at end of file
diff --git a/source/common.cpp b/source/common.cpp
new file mode 100644
index 0000000..b1c1b7a
--- /dev/null
+++ b/source/common.cpp
@@ -0,0 +1,6 @@
+#include <iostream>
+#include <pd/common.hpp>
+
+void PD::Log(const std::string& txt) {
+  std::cout << "[PD] " << txt << std::endl;
+}
\ No newline at end of file
diff --git a/source/drivers/gfx.cpp b/source/drivers/gfx.cpp
index e8dfc39..5e64aeb 100755
--- a/source/drivers/gfx.cpp
+++ b/source/drivers/gfx.cpp
@@ -5,15 +5,20 @@ PD_API std::unique_ptr<GfxDriver> Gfx::driver;
 
 GfxDriver::GfxDriver(std::string_view name) : DriverInterface(name) {}
 
-void GfxDriver::SetViewPort(const ivec2& size) { ViewPort = size; }
+void GfxDriver::SetViewPort(const ivec2& size) {
+  ViewPort = size;
+  Projection = Mat4::Ortho(0.f, ViewPort.x, ViewPort.y, 0.f, 1.f, -1.f);
+}
 void GfxDriver::SetViewPort(int x, int y) {
   ViewPort.x = x;
   ViewPort.y = y;
+  Projection = Mat4::Ortho(0.f, ViewPort.x, ViewPort.y, 0.f, 1.f, -1.f);
 }
 
 void GfxDriver::Reset() {
   CurrentVertex = 0;
   CurrentIndex = 0;
+  ResetPools();
   SysReset();
 }
 }  // namespace PD
\ No newline at end of file
diff --git a/source/lithium/pools.cpp b/source/lithium/pools.cpp
new file mode 100644
index 0000000..e5be94f
--- /dev/null
+++ b/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
\ No newline at end of file
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 4ddc2f0..b0e7a20 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,3 +1,4 @@
 cmake_minimum_required(VERSION 3.22)
 
-add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/core)
\ No newline at end of file
+add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/core)
+add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/gfx)
\ No newline at end of file
diff --git a/tests/gfx/CMakeLists.txt b/tests/gfx/CMakeLists.txt
new file mode 100644
index 0000000..4128ff4
--- /dev/null
+++ b/tests/gfx/CMakeLists.txt
@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.22)
+
+project(gfx-tests)
+
+add_executable(gfx-tests ${CMAKE_CURRENT_SOURCE_DIR}/source/main.cpp)
+target_link_libraries(gfx-tests PRIVATE palladium::palladium pd-system glfw)
diff --git a/tests/gfx/source/main.cpp b/tests/gfx/source/main.cpp
new file mode 100644
index 0000000..fc3d2f8
--- /dev/null
+++ b/tests/gfx/source/main.cpp
@@ -0,0 +1,73 @@
+#include <glad/glad.h>
+//////////////////////////
+#include <GLFW/glfw3.h>
+
+#include <format>
+#include <gfx_opengl.hpp>
+#include <iostream>
+#include <palladium>
+
+#include "pd/core/vec2.hpp"
+#include "pd/lithium/pools.hpp"
+#include "pd/lithium/vertex.hpp"
+
+class App {
+ public:
+  App() {
+    PD::Os::UseDriver<PD::OsDriver>();
+    PD::Gfx::UseDriver<PD::GfxOpenGL>();
+    glfwInit();
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+    glfwWindowHint(GLFW_OPENGL_DEBUG_CONTEXT, GLFW_TRUE);
+    window = glfwCreateWindow(1280, 720, "gfx_tests", nullptr, nullptr);
+    glfwMakeContextCurrent(window);
+    gladLoadGLLoader(reinterpret_cast<GLADloadproc>(glfwGetProcAddress));
+    glfwSwapInterval(1);
+    PD::Gfx::Init();
+    PD::Li::InitPools(8192);
+    std::vector<PD::u8> img(16 * 16 * 4, 0xff);
+    pTex = PD::Gfx::LoadTexture(img, 16, 16);
+    std::cout << "GfxDriver: " << PD::Gfx::GetDriverName() << std::endl;
+    pPool.Init(10);
+    auto cmd = pPool.Allocate(1);
+    cmd->Reserve(4, 6);
+    cmd->Add(PD::Li::Vertex(PD::fvec2(0, 0), PD::fvec2(0, 0), 0xffffffff));
+    cmd->Add(PD::Li::Vertex(PD::fvec2(50, 0), PD::fvec2(1, 0), 0xffffffff));
+    cmd->Add(PD::Li::Vertex(PD::fvec2(50, 50), PD::fvec2(1, 1), 0xffffffff));
+    cmd->Add(PD::Li::Vertex(PD::fvec2(0, 50), PD::fvec2(0, 1), 0xffffffff));
+    cmd->Add(0, 1, 2);
+    cmd->Add(0, 2, 3);
+    cmd->Tex = pTex;
+  }
+  ~App() {
+    PD::Gfx::Deinit();
+    glfwDestroyWindow(window);
+    glfwTerminate();
+  }
+
+  void Run() {
+    while (!glfwWindowShouldClose(window)) {
+      glViewport(0, 0, 1280, 720);
+      glClearColor(0.1, 0.1, 0.1, 0.1);
+      glClear(GL_COLOR_BUFFER_BIT);
+      PD::Gfx::Reset();
+      PD::Gfx::SetViewPort(1280, 720);
+      PD::Gfx::Draw(pPool);
+      glfwPollEvents();
+      glfwSwapBuffers(window);
+    }
+  }
+
+ private:
+  GLFWwindow* window = nullptr;
+  PD::Pool<PD::Li::Command> pPool;
+  PD::ptr pTex = 0;
+};
+
+int main() {
+  App app;
+  app.Run();
+  return 0;
+}
\ No newline at end of file
diff --git a/vendor/CMakeLists.txt b/vendor/CMakeLists.txt
index d3d0333..64cdd42 100644
--- a/vendor/CMakeLists.txt
+++ b/vendor/CMakeLists.txt
@@ -5,4 +5,10 @@ add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/glad)
 
 # STB
 add_library(stb INTERFACE)
-target_include_directories(stb INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/stb)
\ No newline at end of file
+target_include_directories(stb INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/stb)
+
+# GLFW
+set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "")
+set(GLFW_BUILD_TESTS OFF CACHE BOOL "")
+set(GLFW_BUILD_DOCS OFF CACHE BOOL "")
+add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/glfw)
\ No newline at end of file
diff --git a/vendor/glfw b/vendor/glfw
new file mode 160000
index 0000000..7b6aead
--- /dev/null
+++ b/vendor/glfw
@@ -0,0 +1 @@
+Subproject commit 7b6aead9fb88b3623e3b3725ebb42670cbe4c579