Add wide screen mode support to Gfx

ctru-rs/examples/gfx_wide_mode.rs

@@ -0,0 +1,33 @@
+extern crate ctru;
+
+use ctru::console::Console;
+use ctru::Gfx;
+use ctru::gfx::Screen;
+use ctru::services::{Apt, Hid};
+use ctru::services::hid::KeyPad;
+
+fn main() {
+    ctru::init();
+    let apt = Apt::init().unwrap();
+    let hid = Hid::init().unwrap();
+    let gfx = Gfx::default();
+    let _console = Console::init(Screen::Top);
+
+    println!("Press A to enable/disable wide screen mode.");
+
+    while apt.main_loop() {
+        hid.scan_input();
+
+        if hid.keys_down().contains(KeyPad::KEY_START) {
+            break
+        }
+
+        if hid.keys_down().contains(KeyPad::KEY_A) {
+            gfx.set_wide_mode(!gfx.get_wide_mode());
+        }
+
+        gfx.flush_buffers();
+        gfx.swap_buffers();
+        gfx.wait_for_vblank();
+    }
+}

ctru-rs/src/gfx.rs

@@ -49,6 +49,18 @@ impl Gfx {
         }
     }
 
+    /// Enable or disable the wide screen mode (top screen).
+    ///
+    /// This only works when 3D is disabled.
+    pub fn set_wide_mode(&self, enabled: bool) {
+        unsafe { libctru::gfxSetWide(enabled) };
+    }
+
+    /// Get the status of wide screen mode.
+    pub fn get_wide_mode(&self) -> bool {
+        unsafe { libctru::gfxIsWide() }
+    }
+
     /// Sets whether to use double buffering. Enabled by default.
     /// 
     /// Note that even when double buffering is disabled, one should still use the `swap_buffers`