Moved a bunch of code around

src/duskgl/display/framebuffer/framebuffergl.h

@@ -0,0 +1,36 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "display/texture/texture.h"
+#include "error/errorgl.h"
+
+typedef struct {
+  GLuint id;
+  texture_t texture;
+} framebuffergl_t;
+
+/**
+ * Initializes the backbuffer framebuffer.  (OpenGL implementation).
+ */
+errorret_t frameBufferGLInitBackBuffer(void);
+
+#ifdef DUSK_DISPLAY_SIZE_DYNAMIC
+  /**
+   * Initializes an OpenGL style framebuffer.
+   * 
+   * @param fb The framebuffer to initialize.
+   * @param width The width of the framebuffer.
+   * @param height The height of the framebuffer.
+   * @return Either error or not.
+   */
+  errorret_t frameBufferGLInit(
+    framebuffergl_t *fb,
+    const uint32_t width,
+    const uint32_t height
+  );
+#endif