More fixes

src/duskgl/display/framebuffer/framebuffergl.c

@@ -130,4 +130,17 @@ void frameBufferClear(const uint8_t flags, const color_t color) {
     errorChain(errorGLCheck());
     errorOk();
   }
+  
+  errorret_t frameBufferGLDispose(framebuffer_t *framebuffer) {
+    assertNotNull(framebuffer, "Framebuffer cannot be NULL");
+
+    if(framebuffer == &FRAMEBUFFER_BACKBUFFER) {
+      assertUnreachable("Cannot dispose of backbuffer");
+    }
+
+    errorChain(textureDispose(&framebuffer->texture));
+    glDeleteFramebuffersEXT(1, &framebuffer->id);
+    errorChain(errorGLCheck());
+    errorOk();
+  }
 #endif