Make input_overlay.h no longer depend on RPNG image

gfx/d3d/d3d.cpp

@@ -1517,10 +1517,12 @@ static void d3d_overlay_vertex_geom(void *data,
 }
 
 static bool d3d_overlay_load(void *data,
-      const texture_image *images, unsigned num_images)
+      const void *image_data, unsigned num_images)
 {
    unsigned i, y;
    d3d_video_t *d3d = (d3d_video_t*)data;
+   const texture_image *images = (const texture_image*)
+      image_data;
 
    if (!d3d)
 	   return false;

gfx/drivers/gl.c

@@ -2900,10 +2900,12 @@ unsigned *height_p, size_t *pitch_p)
 #ifdef HAVE_OVERLAY
 static void gl_free_overlay(gl_t *gl);
 static bool gl_overlay_load(void *data, 
-      const struct texture_image *images, unsigned num_images)
+      const void *image_data, unsigned num_images)
 {
    unsigned i, j;
    gl_t *gl = (gl_t*)data;
+   const struct texture_image *images = 
+      (const struct texture_image*)image_data;
 
    if (!gl)
       return false;

gfx/drivers/gx_gfx.c

@@ -1341,10 +1341,12 @@ static void gx_get_poke_interface(void *data, const video_poke_interface_t **ifa
 #ifdef HAVE_OVERLAY
 static void gx_overlay_tex_geom(void *data, unsigned image, float x, float y, float w, float h);
 static void gx_overlay_vertex_geom(void *data, unsigned image, float x, float y, float w, float h);
-static bool gx_overlay_load(void *data, const struct texture_image *images, unsigned num_images)
+
+static bool gx_overlay_load(void *data, const void *image_data, unsigned num_images)
 {
    unsigned i;
    gx_video_t *gx = (gx_video_t*)data;
+   const struct texture_image *images = (const struct texture_image*)image_data;
 
    gx_free_overlay(gx);
    gx->overlay = (struct gx_overlay_data*)calloc(num_images, sizeof(*gx->overlay));

gfx/video_thread_wrapper.c

@@ -750,10 +750,12 @@ static void thread_overlay_enable(void *data, bool state)
 }
 
 static bool thread_overlay_load(void *data,
-      const struct texture_image *images, unsigned num_images)
+      const void *image_data, unsigned num_images)
 {
    thread_video_t *thr = (thread_video_t*)data;
    thread_packet_t pkt = { CMD_OVERLAY_LOAD };
+   const struct texture_image *images = 
+      (const struct texture_image*)image_data;
 
    if (!thr)
       return false;

input/input_overlay.c

@@ -23,6 +23,7 @@
 #include <file/file_path.h>
 #include <string/string_list.h>
 #include <file/config_file.h>
+#include <formats/image.h>
 #include <clamping.h>
 #include <rhash.h>
 

input/input_overlay.h

@@ -21,8 +21,6 @@
 #include <boolean.h>
 
 #include <retro_miscellaneous.h>
-#include <formats/image.h>
-
 #include "../libretro.h"
 
 #ifdef __cplusplus
@@ -47,7 +45,7 @@ typedef struct video_overlay_interface
 {
    void (*enable)(void *data, bool state);
    bool (*load)(void *data,
-         const struct texture_image *images, unsigned num_images);
+         const void *images, unsigned num_images);
    void (*tex_geom)(void *data, unsigned image,
          float x, float y, float w, float h);
    void (*vertex_geom)(void *data, unsigned image,