Add pause / resume

3 files changed, 32 insertions, 1 deletions

diff --git a/README.md b/README.md
index a5a758d..867195a 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,16 @@ Running the game:
 - 386 or later
 - Some RAM! (TBD)
 
+The game can be controlled by keyboard.
+
+| Key | Action |
+| --- | --- |
+| Cursor up | Jump |
+| Cursor left | Move left |
+| Cursor right | Move Right |
+| P | Pause / resume game |
+| ESC | Exit the game |
+
 Development:
 
 - GNU Make
diff --git a/TODO.md b/TODO.md
index cbe486c..8ccd4df 100644
--- a/TODO.md
+++ b/TODO.md
@@ -10,7 +10,6 @@
 - sound
   - libmikmod
 - screens
-  - pause
   - intro, new game
 - input
   - joystick?
diff --git a/src/game.c b/src/game.c
index 4441cf0..0113fe1 100644
--- a/src/game.c
+++ b/src/game.c
@@ -40,6 +40,7 @@ static uint8_t stage;
 static uint8_t time;
 static uint8_t pickaxe;
 static uint8_t gameover;
+static uint8_t pause;
 
 static void wait_time(uint16_t frames)
 {
@@ -121,6 +122,9 @@ static void run_gameover()
 
 void run_game()
 {
+    pause = 0;
+    gameover = 0;
+
     lives = GAME_LIVES_START;
     score = 0;
     stage = 0;
@@ -164,6 +168,24 @@ void run_game()
         if (hud)
             hud_render();
 
+        if (keys[KEY_P])
+        {
+            /* pause / resume */
+            pause ^= 1;
+
+            /* wait for the key to be released */
+            while (keys[KEY_P])
+                wait_vsync();
+
+            if (pause)
+                timer_stop();
+            else
+                timer_resume();
+        }
+
+        if (pause)
+            continue;
+
         /* erase first the last we draw */
         player_erase();
         entities_erase();