Make input overlay configurable.

driver.c

@@ -721,8 +721,17 @@ void init_video_input(void)
 
    // TODO: This should probably be done somewhere else.
    if (driver.overlay)
+   {
       input_overlay_free(driver.overlay);
-   driver.overlay = input_overlay_new(NULL);
+      driver.overlay = NULL;
+   }
+
+   if (*g_settings.input.overlay)
+   {
+      driver.overlay = input_overlay_new(g_settings.input.overlay);
+      if (!driver.overlay)
+         RARCH_ERR("Failed to load overlay.\n");
+   }
 }
 
 void uninit_video_input(void)

general.h

@@ -185,6 +185,8 @@ struct settings
 
       unsigned turbo_period;
       unsigned turbo_duty_cycle;
+
+      char overlay[PATH_MAX];
    } input;
 
    char libretro[PATH_MAX];

input/overlay.c

@@ -28,9 +28,8 @@ struct input_overlay
 
 input_overlay_t *input_overlay_new(const char *overlay)
 {
-   (void)overlay;
-
    input_overlay_t *ol = (input_overlay_t*)calloc(1, sizeof(*ol));
+
    if (!ol)
       goto error;
 
@@ -46,9 +45,8 @@ input_overlay_t *input_overlay_new(const char *overlay)
    if (!ol->iface)
       goto error;
 
-   // Test hardcoded.
    struct texture_image img = {0};
-   if (!texture_image_load("/tmp/basic_overlay.png", &img))
+   if (!texture_image_load(overlay, &img))
    {
       RARCH_ERR("Failed to load overlay image.\n");
       goto error;

retroarch.cfg

@@ -196,6 +196,9 @@
 # Defines axis threshold. Possible values are [0.0, 1.0]
 # input_axis_threshold = 0.5
 
+# Path to input overlay
+# input_overlay =
+
 # Keyboard input. Will recognize normal keypresses and special keys like "left", "right", and so on.
 # Keyboard input, Joypad and Joyaxis will all obey the "nul" bind, which disables the bind completely, 
 # rather than relying on a default.

settings.c

@@ -564,6 +564,8 @@ bool config_load_file(const char *path)
    CONFIG_GET_INT(input.turbo_period, "input_turbo_period");
    CONFIG_GET_INT(input.turbo_duty_cycle, "input_duty_cycle");
 
+   CONFIG_GET_PATH(input.overlay, "input_overlay");
+
    if (config_get_string(conf, "environment_variables",
             &g_extern.system.environment))
    {