diff --git a/minui/minui.h b/minui/minui.h
index 4c629c1..18173b1 100644
--- a/minui/minui.h
+++ b/minui/minui.h
@@ -17,6 +17,116 @@
 #ifndef _MINUI_H_
 #define _MINUI_H_
 
+#ifndef TW_USE_OLD_MINUI_H
+
+#include <sys/types.h>
+
+#include <functional>
+
+//
+// Graphics.
+//
+
+struct GRSurface {
+    int width;
+    int height;
+    int row_bytes;
+    int pixel_bytes;
+    unsigned char* data;
+};
+
+int gr_init();
+void gr_exit();
+
+int gr_fb_width();
+int gr_fb_height();
+
+void gr_flip();
+void gr_fb_blank(bool blank);
+
+void gr_clear();  // clear entire surface to current color
+void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a);
+void gr_fill(int x1, int y1, int x2, int y2);
+void gr_text(int x, int y, const char *s, bool bold);
+void gr_texticon(int x, int y, GRSurface* icon);
+int gr_measure(const char *s);
+void gr_font_size(int *x, int *y);
+
+void gr_blit(GRSurface* source, int sx, int sy, int w, int h, int dx, int dy);
+unsigned int gr_get_width(GRSurface* surface);
+unsigned int gr_get_height(GRSurface* surface);
+
+//
+// Input events.
+//
+
+struct input_event;
+
+// TODO: move these over to std::function.
+typedef int (*ev_callback)(int fd, uint32_t epevents, void* data);
+typedef int (*ev_set_key_callback)(int code, int value, void* data);
+
+int ev_init(ev_callback input_cb, void* data);
+void ev_exit();
+int ev_add_fd(int fd, ev_callback cb, void* data);
+void ev_iterate_available_keys(std::function<void(int)> f);
+int ev_sync_key_state(ev_set_key_callback set_key_cb, void* data);
+
+// 'timeout' has the same semantics as poll(2).
+//    0 : don't block
+//  < 0 : block forever
+//  > 0 : block for 'timeout' milliseconds
+int ev_wait(int timeout);
+
+int ev_get_input(int fd, uint32_t epevents, input_event* ev);
+void ev_dispatch();
+int ev_get_epollfd();
+
+//
+// Resources
+//
+
+// res_create_*_surface() functions return 0 if no error, else
+// negative.
+//
+// A "display" surface is one that is intended to be drawn to the
+// screen with gr_blit().  An "alpha" surface is a grayscale image
+// interpreted as an alpha mask used to render text in the current
+// color (with gr_text() or gr_texticon()).
+//
+// All these functions load PNG images from "/res/images/${name}.png".
+
+// Load a single display surface from a PNG image.
+int res_create_display_surface(const char* name, GRSurface** pSurface);
+
+// Load an array of display surfaces from a single PNG image.  The PNG
+// should have a 'Frames' text chunk whose value is the number of
+// frames this image represents.  The pixel data itself is interlaced
+// by row.
+int res_create_multi_display_surface(const char* name,
+                                     int* frames, GRSurface*** pSurface);
+
+// Load a single alpha surface from a grayscale PNG image.
+int res_create_alpha_surface(const char* name, GRSurface** pSurface);
+
+// Load part of a grayscale PNG image that is the first match for the
+// given locale.  The image is expected to be a composite of multiple
+// translations of the same text, with special added rows that encode
+// the subimages' size and intended locale in the pixel data.  See
+// development/tools/recovery_l10n for an app that will generate these
+// specialized images from Android resources.
+int res_create_localized_alpha_surface(const char* name, const char* locale,
+                                       GRSurface** pSurface);
+
+// Free a surface allocated by any of the res_create_*_surface()
+// functions.
+void res_free_surface(GRSurface* surface);
+
+#else //ifndef TW_USE_OLD_MINUI_H
+
+// This the old minui.old/minui.h for compatibility with building TWRP
+// in pre 6.0 trees.
+
 #include <stdbool.h>
 
 #ifdef __cplusplus
@@ -102,4 +212,5 @@
 }
 #endif
 
-#endif
+#endif // ifndef TW_USE_OLD_MINUI_H
+#endif // ifndef _MINUI_H_