Added SDL_HINT_VULKAN_DISPLAY

include/SDL3/SDL_hints.h

@@ -3373,6 +3373,17 @@ extern "C" {
  */
 #define SDL_HINT_VITA_TOUCH_MOUSE_DEVICE    "SDL_VITA_TOUCH_MOUSE_DEVICE"
 
+/**
+ * A variable overriding the display index used in SDL_Vulkan_CreateSurface()
+ *
+ * The display index starts at 0, which is the default.
+ *
+ * This hint should be set before calling SDL_Vulkan_CreateSurface()
+ *
+ * \since This hint is available since SDL 3.0.0.
+ */
+#define SDL_HINT_VULKAN_DISPLAY "SDL_VULKAN_DISPLAY"
+
 /**
  * Specify the Vulkan library to load.
  *