copy construct RenderTarget.

include/JGL/types/RenderTarget.h

@@ -10,9 +10,6 @@ namespace JGL {
     class Texture; // Forward declare.
 }
 
-//TODO copy constructor for this. Copying this as it is and then that copy going out of scope will crash the program as it sits.
-//If you do copy it you're doing it wrong. But still.
-
 class JGL::RenderTarget {
 private:
     Color4 clear_color{0,0,0,0};
@@ -59,6 +56,8 @@ public:
     /// Get the data back from the FBO. This is *not* async friendly.
     [[nodiscard]] std::vector<GLfloat> GetData() const;
 public:
+    /// Copy constructor. Will always set "texture_created_by_us" to true and use our own texture to avoid memleaks.
+    RenderTarget(const RenderTarget& rhs);
     /// Create a render target for a texture that already exists. For adding to an existing texture.
     explicit RenderTarget(const Texture* texture, const Color4& clear_color = Colors::Black);
     /// Create a Render Target with a brand new texture. Want to render JGL elements onto a texture and display it as a sprite?