1 ;;; Gacela, a GNU Common Lisp extension for fast games development
2 ;;; Copyright (C) 2009 by Javier Sancho Fernandez <jsf at jsancho dot org>
4 ;;; This program is free software: you can redistribute it and/or modify
5 ;;; it under the terms of the GNU General Public License as published by
6 ;;; the Free Software Foundation, either version 3 of the License, or
7 ;;; (at your option) any later version.
9 ;;; This program is distributed in the hope that it will be useful,
10 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
11 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 ;;; GNU General Public License for more details.
14 ;;; You should have received a copy of the GNU General Public License
15 ;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
20 ;;; Default values for Gacela
21 (defvar *width-screen* 640)
22 (defvar *height-screen* 480)
23 (defvar *bpp-screen* 32)
24 (defvar *title-screen* "Happy Hacking!!")
25 (defvar *frames-per-second* 20)
26 (defvar *transparent-color* '(:red 0 :green 0 :blue 0))
27 (defvar *background-color* '(:red 0 :green 0 :blue 0))
29 ;;; SDL Initialization Subsystem
33 (cond ((null initialized) (setq initialized (SDL_Init SDL_INIT_EVERYTHING)))
37 (setq initialized (SDL_Quit))))
41 (defstruct surface address clip-w clip-h shape)
45 (defun init-video-mode (&key (width *width-screen*) (height *height-screen*) (bpp *bpp-screen*))
48 (SDL_GL_SetAttribute SDL_GL_DOUBLEBUFFER 1)
49 (setq flags (+ SDL_OPENGL SDL_GL_DOUBLEBUFFER SDL_HWPALETTE SDL_RESIZABLE
50 (if (= (getf (SDL_GetVideoInfo) :hw_available) 0) SDL_SWSURFACE SDL_HWSURFACE)
51 (if (= (getf (SDL_GetVideoInfo) :blit_hw) 0) 0 SDL_HWACCEL)))
52 (setq screen (SDL_SetVideoMode width height bpp flags))
54 (resize-screen-GL width height))
57 (defun resize-screen (width height bpp)
58 (setq screen (SDL_SetVideoMode width height bpp flags))
59 (resize-screen-GL width height))
61 (defun fill-screen (color)
63 (fill-surface screen (getf color :red) (getf color :green) (getf color :blue)))
66 (cond ((null screen) nil)
67 (t (SDL_Flip screen))))
69 (defun quit-video-mode ()
75 (glShadeModel GL_SMOOTH)
76 (glClearColor 0 0 0 0)
78 (glDepthFunc GL_LEQUAL)
80 ; (glBlendFunc GL_SRC_ALPHA GL_ONE)
81 (glHint GL_PERSPECTIVE_CORRECTION_HINT GL_NICEST)
84 (defun init-lighting ()
86 (glEnable GL_LIGHTING))
88 (defun resize-screen-GL (width height)
89 (let ((ratio (if (= height 0) width (/ width height))))
90 ; (glViewPort 0 0 width height)
91 (glMatrixMode GL_PROJECTION)
93 (let* ((w (/ width 2)) (-w (neg w)) (h (/ height 2)) (-h (neg h)))
94 (glOrtho -w w -h h 0 1))
95 ; (gluPerspective 45 ratio 0.1 100)
96 (glMatrixMode GL_MODELVIEW)
100 (let ((current-color '(1 1 1 1)))
101 (defun get-current-color ()
104 (defun set-current-color (red green blue &optional (alpha 1))
105 (setq current-color (list red green blue alpha))
106 (glColor4f red green blue alpha)))
108 (defun load-image (image-file &key (transparent-color nil))
110 (let ((loaded-image (IMG_Load image-file)))
111 (cond ((= loaded-image 0) nil)
112 (t (let ((optimized-image (SDL_DisplayFormat loaded-image)))
113 (SDL_FreeSurface loaded-image)
114 (cond ((= optimized-image 0) nil)
115 ((null transparent-color) optimized-image)
116 (t (SDL_SetColorKey optimized-image
118 (SDL_MapRGB (surface-format optimized-image)
119 (car transparent-color)
120 (cadr transparent-color)
121 (caddr transparent-color)))
122 optimized-image)))))))
124 (defun load-image2 (image-file &key (transparent-color nil))
125 (let ((address-image (load-image image-file :transparent-color transparent-color)))
127 (lambda (x y) (print-surface x y address-image))
128 (lambda () (SDL_FreeSurface address-image)))))
130 (defun clean-screen ()
131 (fill-screen *background-color*))
133 (defun refresh-screen ()
135 (funcall-procs #'print-mob)
143 (cond ((null audio) (progn (init-sdl) (setq audio (Mix_OpenAudio 22050 2 4096))))
147 (setq audio (Mix_CloseAudio))))
150 ;;; Resources Manager
151 (defstruct resource plist constructor destructor time)
153 (defun make-resource-texture (&key filename min-filter mag-filter)
154 `(:type texture :filename ,filename :min-filter ,min-filter :mag-filter ,mag-filter))
156 (defun make-resource-font (&key filename encoding)
157 `(:type font :filename ,filename :enconding ,encoding))
159 (defmacro get-rtime (key)
160 `(resource-time (gethash ,key resources-table)))
162 (defmacro get-rplist (key)
163 `(resource-plist (gethash ,key resources-table)))
165 (defmacro get-rconstructor (key)
166 `(resource-constructor (gethash ,key resources-table)))
168 (defmacro get-rdestructor (key)
169 `(resource-destructor (gethash ,key resources-table)))
171 (let ((resources-table (make-hash-table :test 'equal))
172 (expiration-time 50000))
174 (defun set-expiration-time (new-time)
175 (setq expiration-time new-time))
177 (defun set-resource (key plist constructor destructor &key static)
179 (setf (gethash key resources-table)
180 (make-resource :plist plist
181 :constructor constructor
182 :destructor destructor
183 :time (if static t (SDL_GetTicks)))))
185 (defun get-resource (key)
186 (cond ((null (gethash key resources-table)) nil)
187 (t (let ((time (get-rtime key)))
188 (cond ((null time) (funcall (get-rconstructor key)))
189 ((numberp time) (setf (get-rtime key) (SDL_GetTicks))))
192 (defun free-resource (key)
193 (funcall (get-rdestructor key))
194 (setf (get-rtime key) nil))
196 (defun expire-resource (key &optional (now (SDL_GetTicks)))
197 (let ((time (get-rtime key)))
198 (cond ((and (numberp time) (> (- now time) expiration-time)) (free-resource key)))))
200 (defun expire-resources ()
201 (maphash (lambda (key res) (expire-resource key)) resources-table))
203 (defun free-all-resources ()
204 (maphash (lambda (key res) (free-resource key)) resources-table)))
207 ;;; Gacela Server for development mode
208 (let (socket clients)
209 (defun server-running? ()
212 (defun start-server (port)
213 (setq socket (si::socket port :server #'eval-from-client)))
215 (defun check-server-connections ()
216 (when (si::listen socket) (push (si:accept socket) clients)))
218 (defun eval-from-clients ()
219 (dolist (cli clients) (when (si::listen cli) (eval (read cli))))))
224 (defun prog-command (command)
225 (setq commands (cons command commands)))
227 (defun run-commands ()
230 (setq running commands)
232 (labels ((run-com (comlst)
233 (cond (comlst (run-com (cdr comlst))
234 (eval (read-from-string (concatenate 'string "(progn " (car comlst) ")")))))))
235 (run-com running)))))))
237 (let (time (time-per-frame (/ 1000.0 *frames-per-second*)))
238 (defun set-frames-per-second (fps)
239 (setq time-per-frame (/ 1000.0 fps)))
241 (defun init-frame-time ()
242 (setq time (SDL_GetTicks)))
244 (defun delay-frame ()
245 (let ((frame-time (- (SDL_GetTicks) time)))
246 (cond ((< frame-time time-per-frame)
247 (SDL_Delay (- time-per-frame frame-time)))))))
250 (defmacro run-game (title &body code)
253 (SDL_WM_SetCaption ,title "")
255 (refresh-running-mobs)
258 (glClear (+ GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT))
266 (refresh-running-mobs)
268 (setq running nil))))