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;;;; -*- Mode: Lisp -*-
;;;; Draw and maintain a board for the game of Go
;;;; Author: Matthew Danish <mrd@debian.org>
(defpackage #:goban-sdl
(:use #:common-lisp)
(:nicknames #:gbsdl)
(:export #:start))
(in-package #:goban-sdl)
(defparameter *screen-width* 640)
(defparameter *screen-height* 480)
(defparameter *padding-factor* 48)
(defparameter *left-side-factor* 32)
(defparameter *top-side-factor* 24)
(defparameter *hspacing-factor* 28)
(defparameter *vspacing-factor* 20)
(defvar *padding-x*)
(defvar *padding-y*)
(defvar *x1*)
(defvar *y1*)
(defvar *x-spacer*)
(defvar *y-spacer*)
(defvar *w*)
(defvar *h*)
(defvar *x2*)
(defvar *y2*)
(defvar *radius*)
(defvar *text-x*)
(defvar *text-y*)
(defvar *board*)
(defvar *font*)
(defparameter *font-file* (sdl-data:data-file "bboron" "ttf"))
(defparameter *font-size* 18)
(defun set-video-mode ()
(setf *padding-x* (truncate *screen-width* *padding-factor*)
*padding-y* (truncate *screen-height* *padding-factor*)
*x1* (truncate *screen-width* *left-side-factor*)
*y1* (truncate *screen-height* *top-side-factor*)
*x-spacer* (truncate *screen-width* *hspacing-factor*)
*y-spacer* (truncate *screen-height* *vspacing-factor*)
*w* (* 18 *x-spacer*)
*h* (* 18 *y-spacer*)
*x2* (+ *x1* *w*)
*y2* (+ *y1* *h*)
*radius* (1- (truncate (min *x-spacer* *y-spacer*) 2))
*text-x* (+ (* 2 *padding-x*)
*x1*
(* 20 *x-spacer*))
*text-y* *y1*)
(sdl:set-video-mode *screen-width*
*screen-height*
16
(logior sdl:+resizable+
sdl:+swsurface+
sdl:+doublebuf+)))
(defun init-sdl (&key (title "Go Ban"))
(sdl:init (logior sdl:+init-video+ sdl:+init-noparachute+))
(let ((surface (set-video-mode)))
(when (sgum:null-pointer-p surface)
(error "Unable to set video mode"))
(sdl:wm-set-caption title nil)
surface))
(defun run-sdl-event-loop (surface update-fn mouse-fn)
(sdl:event-loop
(:key-down (scan-code key mod unicode)
(format t "Key down: ~A~%"
(if (< key 256)
(code-char key)
key))
(when (= (char-code #\q) key)
(return-from run-sdl-event-loop nil)))
(:key-up (scan-code key mod unicode)
(format t "Key up: ~A~%"
(if (< key 256)
(code-char key)
key)))
(:mouse-button-up (button x y)
(format t "Mouse button up: ~A (~A, ~A)~%" button x y)
(funcall mouse-fn button x y :up))
(:mouse-button-down (button x y)
(format t "Mouse button dn: ~A (~A, ~A)~%" button x y))
(:quit ()
(return))
(:resize (width height)
(setf *screen-width* width
*screen-height* height
surface (set-video-mode))
(format t "Resized width = ~A height = ~A~%" width height))
(:idle ()
(funcall update-fn surface))))
(defmacro with-game-vars (vars &body body)
`(symbol-macrolet ,(loop for v in vars collect
`(,v ,(intern (format nil "*~A*" v))))
,@body))
(defun place-piece (x y color)
(setf (aref *board* x y)
color))
(defun piece-at (i j)
(aref *board* i j))
(defvar *turn* :black)
(defun default-mouse-handler (button x y up-or-down)
(when (and (eq up-or-down :up)
(eq button :left))
(with-game-vars (x1 y1 radius x-spacer y-spacer)
(let (i j quot-x rem-x quot-y rem-y)
(multiple-value-setq (quot-x rem-x)
(truncate (- x x1) x-spacer))
(multiple-value-setq (quot-y rem-y)
(truncate (- y y1) y-spacer))
(setf i (cond ((<= rem-x radius)
quot-x)
((>= rem-x (- x-spacer radius))
(1+ quot-x)))
j (cond ((<= rem-y radius)
quot-y)
((>= rem-y (- y-spacer radius))
(1+ quot-y))))
(when (and i j (null (piece-at i j)))
(place-piece i j *turn*)
(setf *turn*
(if (eq *turn* :black)
:white
:black)))))))
(defun draw-board (surface)
(with-game-vars (w h padding-x padding-y radius
x-spacer y-spacer x1 y1 x2 y2)
(sdl:draw-filled-rectangle surface
(- x1 padding-x)
(- y1 padding-y)
(+ w (* 2 padding-x))
(+ h (* 2 padding-y))
255 200 0)
(dotimes (i 19)
(let ((x (+ x1 (* i x-spacer)))
(y (+ y1 (* i y-spacer))))
(sdl:draw-line surface
x
y1
x
y2
0 0 0)
(sdl:draw-line surface
x1
y
x2
y
0 0 0)))
(dotimes (i 19)
(dotimes (j 19)
(let ((x (+ x1 (* i x-spacer)))
(y (+ y1 (* j y-spacer))))
(case (aref *board* i j)
((black :black)
(sdl:draw-filled-circle surface x y radius 0 0 0))
((white :white)
(sdl:draw-filled-circle surface x y radius 255 255 255))))))
#+nil
(sdl:update-rect surface x1 y1 w h)))
(defun draw-game-status (surface)
(cl-sdl-ttf:with-solid-text (s *font* (format nil "Turn: ~A" *turn*)
255 255 255)
(sgum:with-foreign-objects ((rect sdl:rect))
(setf (sdl:rect-x rect) *text-x*
(sdl:rect-y rect) *text-y*)
(sdl:blit-surface s sgum:+null-pointer+ surface rect)
#+nil
(sdl:update-rect surface
*text-x*
*text-y*
(sdl:rect-w rect)
(sdl:rect-h rect)))))
(defun update-screen (surface)
(sdl:draw-filled-rectangle surface
0 0 *screen-width* *screen-height*
0 0 0)
(draw-board surface)
(draw-game-status surface)
(sdl:flip surface))
(defun start (&key (width 640) (height 480) (title "Go Ban"))
(let ((*screen-width* width)
(*screen-height* height)
(surface nil)
(*board* (make-array '(19 19) :initial-element nil)))
(setf *turn* :black)
(unwind-protect
(progn
(setf surface (init-sdl :title title))
(when surface
(sdl-ttf:init)
(unwind-protect
(progn
(setf *font* (sdl-ttf:open-font *font-file* *font-size*))
(when *font*
(run-sdl-event-loop surface
#'update-screen
#'default-mouse-handler)))
(when *font*
(sdl-ttf:close-font *font*)))))
(sdl:quit))))
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