1 ;;;; Ru*** roLeplay Playground virtual tabletop
2 ;;;; Copyright (C) 2022 Zull
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 <https://www.gnu.org/licenses/>.
17 (in-package :rulp.graphics)
18 #| -------------------------------------------
19 | This file manipulate the window and the
21 | -------------------------------------------
24 ;; FIXME: search alternative
25 (defun create-entities (map-info map-path)
26 (let ((entities-info (cdr (assoc :entities map-info))))
27 (loop :for entity-info :in entities-info
29 (make-instance 'entity
30 ;; :image (merge-pathnames map-path (cdr (assoc :image-path entity-info)))
31 :background (merge-pathnames map-path (cdr (assoc :image-path entity-info)))
32 :size (if (assoc :size entity-info) (cdr (assoc :size entity-info)) 1)
33 :name (assoc :name entity-info)
36 (defun create-plane (map-info map-path &key (number 0))
37 "convert the map informations into a functioning plane, without number it convert the
39 (let ((plane-info (nth number (cdr (assoc :planes map-info)))))
40 (make-instance 'rulp.layers:plane
41 :background (merge-pathnames map-path (cdr (assoc :image-path plane-info)))
42 :entities-list (create-entities map-info map-path)
43 :grid (make-instance 'squaregrid
44 :span (cdr (assoc :grid-dimension plane-info)))
46 ;; FIXME: generalize... somehow
50 (defun grid-layout (x y &key (size 1))
51 "converts natural coordinates and size into pixel positions. This function can be replaced to change
52 the actual grid layout"
53 (values (cons (* x *plane-grid*)
55 (* size *plane-grid*)))
57 (defun actors-layout (x y)
58 (cons (floor (/ x *plane-grid*))
59 (floor (/ y *plane-grid*)))
62 (defmacro with-playground ((window renderer &key (title "RuLP")) &body body)
63 `(sdl2:with-window (,window :title title :w *window-width* :h *window-height* :flags '(:resizable))
64 ;; NOTE: here is where you should set the window icon, if there's the method to do that
65 (sdl2:with-renderer (,renderer ,window :index -1 :flags '(:accelerated :presentvsync)) ;later add delta
66 (sdl2-image:init '(:png :jpg))
73 ;; FIXME: temporary place
74 ;; set boundaries so the plane doesn't go away with the panning. fix boundaries to -window width, -window height, plane width, plane height
75 (defparameter *viewpoint-offset* '(0 . 0))
76 (defparameter *viewpoint-zoom* 1)
77 (defparameter *mouse-previous* '(0 . 0))
79 (defparameter *framerule* 20
80 "every 20 frames the parameter *changep* is set to t, so it updates informations
81 even when away from keyboard")
83 (defparameter *active-entries* nil
84 "contain the active menu in form of a entry class")
86 (defparameter *changep* t
87 "set to t when a change on the plane is made, if nil the viewpoint is not updated")
89 ;; renderer exists only inside this function, so you cannot create a texture outside
90 ;; (at least for now), more on this later os
91 (defun playground (title &optional (fps 60) (debug-info nil))
92 "initialize and run the game loop. it takes a TITLE to display and FPS for framerate.
93 DEBUG-INFO can be used to display the content on screen for test and debug purposes."
94 (declare (ignore fps))
95 (empty-screen-list) ;; NOTE: This clean the screen list,
96 ;; useful for slime/sly sessions where
97 ;; variables are kept after the program
98 ;; ends but textures are closed with sdl.
99 (sdl2:with-init (:video)
100 (with-playground (window rulp.render:*renderer* :title title)
101 (setf *tr-texture* (let* ((font (sdl2-ttf:open-font "media/IBMPlex.ttf" 100)) ;; FIXME: this crashes the program under windows, throws error on linux but works anyway
102 (font-surface (sdl2-ttf:render-utf8-solid font *tr-string* 0 0 0 0))
103 (font-texture (sdl2:create-texture-from-surface rulp.render:*renderer* font-surface)))
104 (sdl2:free-surface font-surface)
106 (setf *plane* (create-plane *map-info* *map-path*))
107 (setf *plane-grid* (span (rulp.layers:plane-grid *plane*)))
110 (setf *entities-list* (entities-list *plane*))
111 (loop :for i :in *execute-before*
114 ;; (setf *entities-list* (create-entities *map-info* *map-path*))
115 (let (;; (mouse-button-previous nil)
116 (window-texture (sdl2:get-render-target rulp.render:*renderer*))
117 (viewpoint-texture (sdl2:create-texture rulp.render:*renderer* (sdl2:get-window-pixel-format window)
118 2 (w *plane*) (h *plane*))) ;camping into the ramhog
119 (viewpoint-rectangle (sdl2:make-rect 0 0 10 10)))
120 (sdl2:with-event-loop (:method :poll)
123 ;; FIXME: incorporate into input.lisp. check for input every now and then outside keydown
124 (when (sdl2:keyboard-state-p :scancode-up) (setf (cdr *viewpoint-offset*) (+ (cdr *viewpoint-offset*) 10)))
125 (when (sdl2:keyboard-state-p :scancode-down) (setf (cdr *viewpoint-offset*) (+ (cdr *viewpoint-offset*) -10)))
126 (when (sdl2:keyboard-state-p :scancode-left) (setf (car *viewpoint-offset*) (+ (car *viewpoint-offset*) 10)))
127 (when (sdl2:keyboard-state-p :scancode-right) (setf (car *viewpoint-offset*) (+ (car *viewpoint-offset*) -10)))
128 (when (sdl2:keyboard-state-p :scancode-p) (setf *viewpoint-zoom* (+ *viewpoint-zoom* 0.2))) ; FIXME: find the scancode for the plus sign
129 (when (sdl2:keyboard-state-p :scancode-m) (setf *viewpoint-zoom* (+ *viewpoint-zoom* -0.2)))
132 (setf *is-mouse-hold* t)
133 ;; this routine seems identical to the one in idle, instead
134 ;; of calling the second element of the keybind list it calls
135 ;; the third element. If there is something there it would
136 ;; execute a special function for when the mouse is released.
137 (mouse-event *mouse-position*)
140 ;; what about functions that require a single press? just create
141 ;; a keybind (+key+ nil (...)) and it will execute just on
142 ;; release and not on hold
143 ;; (setf mouse-button-previous nil)
145 (setf *is-mouse-hold* nil)
148 ;; bug prevention method. SDL2 can look the :mousebuttonup event
149 ;; only when the mouse is on the window. This makes press,
150 ;; alt+tab and release a way to keep the value to t. This
151 ;; event is a prevention method designed to release the hold
152 ;; when alt+tab or other window shortcuts are used.
153 (setf *is-mouse-hold* nil))
155 ;; same as for windowevent
156 (setf *is-mouse-hold* nil))
157 ;; NOTE: When the user prefear to use only the keyboard or joystick
158 ;; the *cursor-position* is set default, this is set when a key or
159 ;; koystick button is pressed, then menues and actions are chosed with
160 ;; the cursor position. When a mouse motion is detected the
161 ;; mouse-position is set default. the cursor follows the grid on each
162 ;; step and it is an alternative to the mouse movement to do
165 (setf *mouse-previous-position* *mouse-position*)
166 (multiple-value-bind (x y) (sdl2:mouse-state)
167 (setf *mouse-position* (cons x y)))
168 ;; mouse-holding-event
169 ;; (unless *active-entries*
170 ;; (when *is-mouse-hold*
171 ;; (loop :for action :in (mouse-actions *mouse-keybinds*)
172 ;; :do (when action (eval (car action))) ; FIXME: replace eval with a more safer DSL eval
174 ;; ;; (setf mouse-button-previous (mouse-actions *mouse-keybinds*))
176 (when *is-mouse-hold*
177 (mouse-event *mouse-position* :dragp t))
179 ;; trick to avoid functions to change the global draw-color
180 (sdl2:set-render-draw-color rulp.render:*renderer* 0 0 0 255)
185 (sdl2:destroy-texture viewpoint-texture)
186 (setf viewpoint-texture (sdl2:create-texture rulp.render:*renderer*
187 (sdl2:get-window-pixel-format window)
191 (sdl2:set-render-target rulp.render:*renderer* viewpoint-texture)
192 (sdl2:render-clear rulp.render:*renderer*)
193 (loop :for i :in *execute-in-viewpoint*
195 ;; the chain executes the render-plane-and-entities
197 ;; FIXME: grind-render and indexes-render use the renderer
198 ;; directly. Update the facade with line methods and update
199 ;; the functions into chains
201 (grid-render rulp.render:*renderer* 0 0 (w *plane*) (h *plane*))
202 ;; FIXME: change to use the plane directly
205 (indexes-render rulp.render:*renderer* 0 0 (w *plane*) (h *plane*)))
206 ;; FIXME: same as above for grids
207 (sdl2:set-render-draw-color rulp.render:*renderer* 0 0 0 255)
210 (when *pointer* ;; NOTE: to test this out
211 (sdl2:set-render-draw-color rulp.render:*renderer* 128 250 33 255)
212 (let* ((object (nth *pointer* (entities-list *plane*)))
213 (grid (plane-grid *plane*))
214 (obj-position (to-grid grid (coordinates object)))
215 (obj-size (to-grid grid (size object))))
216 (rulp.render:render-square (car obj-position)
220 (sdl2:set-render-draw-color rulp.render:*renderer* 0 0 0 255)
225 ;; display viewpoint on window
226 (sdl2:set-render-target rulp.render:*renderer* window-texture)
227 (sdl2:render-clear rulp.render:*renderer*)
228 (setf (sdl2:rect-x viewpoint-rectangle) (car *viewpoint-offset*))
229 (setf (sdl2:rect-y viewpoint-rectangle) (cdr *viewpoint-offset*))
230 (setf (sdl2:rect-width viewpoint-rectangle) (floor (* (w *plane*) *viewpoint-zoom*)))
231 (setf (sdl2:rect-height viewpoint-rectangle) (floor (* (h *plane*) *viewpoint-zoom*)))
232 (sdl2:render-copy rulp.render:*renderer* viewpoint-texture
234 :dest-rect viewpoint-rectangle)
236 (loop :for i :in *execute-in-window*
239 ;; entries visualization
240 (loop :for entry :in rulp.entries:*entries-list*
241 :do (rulp.entries:render-entry rulp.render:*renderer* entry))
242 ;; (loop :for entry :in *active-entries*
243 ;; :do (display-entry rulp.render:*renderer* entry))
247 (tr-write (format nil "~A" debug-info) 0 0 10 15 rulp.render:*renderer*))
248 (sdl2:render-present rulp.render:*renderer*)
249 ;; updating grids and dimension
250 ;; FIXME: i hate this, find a better way to dinamically change the window dimension
251 (multiple-value-bind (new-width new-height) (sdl2:get-window-size window)
252 (setf *window-width* new-width)
253 (setf *window-height* new-height))
255 (when (< *framerule* 1)
257 (setf *framerule* 20))))
258 (setf *changep* t) ; useful in the repl where parameters are not reset
260 ;; sdl2 kills all textures when the session ends. on normal execution this
261 ;; is not a problem but on emacs because the editor will not delete its
262 ;; variables. Therefore the flyweight would be filled with screens with no
263 ;; textures that will fail the second execution.
265 (loop :for i :in *execute-after*