+#define RETRO_ENVIRONMENT_GET_CURRENT_SOFTWARE_FRAMEBUFFER (40 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+ /* struct retro_framebuffer * --
+ * Returns a preallocated framebuffer which the core can use for rendering
+ * the frame into when not using SET_HW_RENDER.
+ * The framebuffer returned from this call must not be used
+ * after the current call to retro_run() returns.
+ *
+ * The goal of this call is to allow zero-copy behavior where a core
+ * can render directly into video memory, avoiding extra bandwidth cost by copying
+ * memory from core to video memory.
+ *
+ * If this call succeeds and the core renders into it,
+ * the framebuffer pointer and pitch can be passed to retro_video_refresh_t.
+ * If the buffer from GET_CURRENT_SOFTWARE_FRAMEBUFFER is to be used,
+ * the core must pass the exact
+ * same pointer as returned by GET_CURRENT_SOFTWARE_FRAMEBUFFER;
+ * i.e. passing a pointer which is offset from the
+ * buffer is undefined. The width, height and pitch parameters
+ * must also match exactly to the values obtained from GET_CURRENT_SOFTWARE_FRAMEBUFFER.
+ *
+ * It is possible for a frontend to return a different pixel format
+ * than the one used in SET_PIXEL_FORMAT. This can happen if the frontend
+ * needs to perform conversion.
+ *
+ * It is still valid for a core to render to a different buffer
+ * even if GET_CURRENT_SOFTWARE_FRAMEBUFFER succeeds.
+ *
+ * A frontend must make sure that the pointer obtained from this function is
+ * writeable (and readable).
+ */
+
+enum retro_hw_render_interface_type
+{
+ RETRO_HW_RENDER_INTERFACE_VULKAN = 0,
+ RETRO_HW_RENDER_INTERFACE_DUMMY = INT_MAX
+};
+
+/* Base struct. All retro_hw_render_interface_* types
+ * contain at least these fields. */
+struct retro_hw_render_interface
+{
+ enum retro_hw_render_interface_type interface_type;
+ unsigned interface_version;
+};
+#define RETRO_ENVIRONMENT_GET_HW_RENDER_INTERFACE (41 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+ /* const struct retro_hw_render_interface ** --
+ * Returns an API specific rendering interface for accessing API specific data.
+ * Not all HW rendering APIs support or need this.
+ * The contents of the returned pointer is specific to the rendering API
+ * being used. See the various headers like libretro_vulkan.h, etc.
+ *
+ * GET_HW_RENDER_INTERFACE cannot be called before context_reset has been called.
+ * Similarly, after context_destroyed callback returns,
+ * the contents of the HW_RENDER_INTERFACE are invalidated.
+ */