Add function to check for key press.

1 files changed, 32 insertions, 0 deletions

diff --git a/gfx-app/include/gfx/gfx_app.h b/gfx-app/include/gfx/gfx_app.h
index 3c544fa..86c502a 100644
--- a/gfx-app/include/gfx/gfx_app.h
+++ b/gfx-app/include/gfx/gfx_app.h
@@ -28,12 +28,44 @@ typedef struct GfxAppCallbacks {
   GfxAppShutdown shutdown;
 } GfxAppCallbacks;
 
+typedef enum Key {
+  KeyA = 'a',
+  KeyB,
+  KeyC,
+  KeyD,
+  KeyE,
+  KeyF,
+  KeyG,
+  KeyH,
+  KeyI,
+  KeyJ,
+  KeyK,
+  KeyL,
+  KeyM,
+  KeyN,
+  KeyO,
+  KeyP,
+  KeyQ,
+  KeyR,
+  KeyS,
+  KeyT,
+  KeyU,
+  KeyV,
+  KeyW,
+  KeyX,
+  KeyY,
+  KeyZ,
+} Key;
+
 /// Create a window with an OpenGL context and run the main loop.
 bool gfx_app_run(const GfxAppDesc*, const GfxAppCallbacks*);
 
 /// Get the mouse coordinates relative to the app's window.
 void gfx_app_get_mouse_position(double* x, double* y);
 
+/// Return true if the given key is pressed.
+bool gfx_is_key_pressed(Key);
+
 /// Define a main function that initializes and puts the application in a loop.
 /// See also: gfx_app_run().
 #define GFX_APP_MAIN(WIDTH, HEIGHT, MAX_FPS)                                 \