minor refactor

src/graphics/Batch2D.cpp

@@ -19,12 +19,11 @@ Batch2D::Batch2D(size_t capacity) : capacity(capacity), color(1.0f){
     ubyte pixels[] = {
         0xFF, 0xFF, 0xFF, 0xFF
     };
-    blank = new Texture(pixels, 1, 1, GL_RGBA);
+    blank = std::make_unique<Texture>(pixels, 1, 1, GL_RGBA);
     _texture = nullptr;
 }
 
 Batch2D::~Batch2D(){
-    delete blank;
     delete[] buffer;
 }
 

src/graphics/Batch2D.h

@@ -15,10 +15,9 @@ class Batch2D {
     float* buffer;
     size_t capacity;
     std::unique_ptr<Mesh> mesh;
+    std::unique_ptr<Texture> blank;
     size_t index;
     glm::vec4 color;
-
-    Texture* blank;
     Texture* _texture;
 
     void vertex(