Implement a small texture wrapper.

Allows for RAII use of OpenGL textures.

src/glutils.hpp

@@ -2,6 +2,7 @@
 
 #include "LayerData.hpp"
 #include "utils.hpp"
+#include "Texture.hpp"
 #include <GL/glut.h>
 #include <string_view>
 
@@ -15,7 +16,7 @@ namespace fmri {
      * @param subImages Number of subimages in the original image. Sub images are rescaled individually to preserve contrast. Optional, default 1.
      * @return A texture reference.
      */
-    GLuint loadTexture(DType const *data, int width, int height, int subImages = 1);
+    fmri::Texture loadTexture(DType const *data, int width, int height, int subImages = 1);
 
     /**
      * Callback handler to handle resizing windows.