whatever: Added Joystick support

sdl/whatever/whatever.c

@@ -35,6 +35,12 @@ SDL_Texture* gPlayer;
 /* Player coors */
 SDL_Rect gPlayer_dest = { 0 };
 
+/* Gamepads ! */
+	SDL_Joystick* gGameController = NULL;
+
+  /* deadzone, we don't want light taps to do anything */
+	const int JOYSTICK_DEAD_ZONE = 8000;
+
 int main ( int argc, char *argv[] )
 {
 	/* How fast our player moves */
@@ -61,6 +67,12 @@ int main ( int argc, char *argv[] )
 	/* quit if gameover is not 0 */
 	int gameover = 0;
 
+	/* Normalize directions */
+	int	xDir = 0;
+	int yDir = 0;
+
+	SDL_JoyButtonEvent jbutton;
+
   /* message pump */
   while (!gameover)
   {
@@ -72,7 +84,64 @@ int main ( int argc, char *argv[] )
 				gameover = 1;
 			}
 
+			/* Handle joy button press */
+			else if (e.type == SDL_JOYBUTTONDOWN)
+			{
+
+				/* 0 is bottom right? At least that's what it is on my logitec */
+				/* Changed to number 7 as aparently that's start */
+				if (e.jbutton.button == 7)
+				{
+				gameover = 1;
 				}
+			}
+
+			else if (e.type == SDL_JOYAXISMOTION)
+			{
+				/* Motion on controller 0 */
+				if( e.jaxis.axis == 0 )
+				{
+					/* Left of dead zone */
+					if( e.jaxis.value < -JOYSTICK_DEAD_ZONE )
+					{
+						xDir = -1;
+					}
+					/* Right of dead zone */
+					else if( e.jaxis.value > JOYSTICK_DEAD_ZONE )
+					{
+						xDir = 1;
+					}
+					else
+					{
+						xDir = 0;
+					}
+
+				}
+				/* Y axis motion -- Note that this is 1 */
+				if (e.jaxis.axis == 1 )
+				{
+					/*Below the dead zone */
+
+					if(e.jaxis.value < -JOYSTICK_DEAD_ZONE)
+					{
+						yDir = -1;
+					}
+					else if (e.jaxis.value > JOYSTICK_DEAD_ZONE)
+					{
+						yDir = 1;
+					}
+					else
+					{
+						yDir = 0;
+					}
+				}
+			}
+		}
+
+
+		/* move the player with the above input */
+		gPlayer_dest.x += xDir;
+		gPlayer_dest.y += yDir;
 
 		const Uint8* currentKeyStates = SDL_GetKeyboardState( NULL );
 		if (currentKeyStates[ SDL_SCANCODE_ESCAPE ] || 
@@ -99,6 +168,8 @@ int main ( int argc, char *argv[] )
 		}
 
 
+
+
   	/* render the background */
 		SDL_RenderCopy(gRenderer, gBackground_texture, NULL, NULL);
 
@@ -133,6 +204,21 @@ int init()
 		return 1;
 	}
 
+	/* Check for joysticks */
+	if( SDL_NumJoysticks() < 1 )
+	{
+		printf( "Warning: No joysticks detected!\n" );
+	}
+	else
+	{
+		/* Load Joystick */
+		gGameController = SDL_JoystickOpen( 0 );
+		if ( gGameController == NULL )
+		{
+			printf( "Warning: Unable to open game controller! SDL Error: %s\n", SDL_GetError());
+		}
+	}
+	
 	return 0;
 }
 
@@ -200,10 +286,23 @@ void close_game()
 {
 
   /* cleanup SDL */
-	if (gRenderer) SDL_DestroyRenderer(gRenderer);
+
-	if (gScreen) SDL_DestroyWindow(gScreen);
+	/* Destroy textures */
 	if (gBackground_texture) SDL_DestroyTexture(gBackground_texture);
 	if (gPlayer) SDL_DestroyTexture(gPlayer);
+	gBackground_texture = NULL;
+	gPlayer = NULL;
 
+	/* Destroy window */
+	if (gRenderer) SDL_DestroyRenderer(gRenderer);
+	if (gScreen) SDL_DestroyWindow(gScreen);
+	gRenderer = NULL;
+	gScreen = NULL;
+
+	/* Close game controller */
+	if (gGameController) SDL_JoystickClose(gGameController);
+	gGameController = NULL;
+	
+	/* quit subsystems */
   SDL_Quit();
 }