-
Notifications
You must be signed in to change notification settings - Fork 2
/
epaint-canvas.el
345 lines (297 loc) · 13.8 KB
/
epaint-canvas.el
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
;;; epaint-canvas.el --- A simple paint tool for Emacs -*- lexical-binding: t; -*-
;; Copyright (C) 2016 chuntaro <chuntaro@sakura-games.jp>
;; Author: chuntaro <chuntaro@sakura-games.jp>
;; Maintainer: chuntaro <chuntaro@sakura-games.jp>
;; Version: 0.1.0
;; Package-Requires: ((emacs "24.4"))
;; Keywords: paint, mouse
;; URL: https://github.com/chuntaro/xxxxxx
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;;; Code:
(eval-and-compile
(defvar epaint-internal-format 'pbm))
(require (intern (concat "epaint-internal-format-"
(symbol-name epaint-internal-format))))
(require 'eieio)
(require 'epaint-draw)
(require 'epaint-context)
(require 'epaint-history)
;;; Helpers
(defmacro epaint-with-timer (title &rest forms)
"Run the given FORMS, counting the elapsed time.
A message including the given TITLE and the corresponding elapsed
time is displayed."
(declare (indent 1))
(let ((nowvar (make-symbol "now"))
(body `(progn ,@forms)))
`(let ((,nowvar (current-time)))
(message "%s..." ,title)
(prog1 ,body
(let ((elapsed
(float-time (time-subtract (current-time) ,nowvar))))
(message "%s... done (%.3fs)" ,title elapsed))))))
(defun epaint-setup-paint-mode (canvas)
(buffer-disable-undo)
(setq show-trailing-whitespace nil
buffer-read-only t
truncate-lines t
line-spacing 0
cursor-type nil
view-read-only nil
write-contents-functions (lambda ()
(epaint-write-file canvas
buffer-file-name)))
(setq-local auto-hscroll-mode nil)
(add-hook 'auto-save-hook
(lambda ()
(and (eq major-mode 'epaint-mode)
canvas
(epaint-write-back canvas buffer-file-name)))))
;;; Plug-in Functions
(defvar epaint-default-directory (file-name-directory
(file-truename
(expand-file-name
(locate-library "epaint")))))
(defvar epaint-plug-in-default-directory (concat epaint-default-directory
"plug-ins/"))
(defun epaint-plug-in-load-all (&optional plug-ins-path)
(let ((match (mapconcat (lambda (sfx)
(concat "\\" sfx "$"))
(get-load-suffixes)
"\\|"))
(path (or plug-ins-path
epaint-plug-in-default-directory)))
;; (dolist (file (directory-files path t "\\.el$"))
;; (byte-compile-file file))
(mapcar (lambda (file)
(let ((load-path (list path)))
(require (intern file) nil t)))
(delete-dups (mapcar #'file-name-base
(directory-files path nil match))))))
(defun epaint-plug-in-codec-get (prefix filename &optional ext)
(when (and prefix filename)
(setq ext (or ext (file-name-extension filename) "xbm")
filename (if (string= (downcase (file-name-extension filename t))
(concat "." ext))
filename
(concat (file-name-sans-extension filename) "." ext)))
(let ((func (intern (format "epaint-%s-%s" prefix ext))))
(when (fboundp func)
(cl-values func filename ext)))))
(defun epaint-plug-in-codec-funcall (prefix ext &rest args)
(let ((func (intern (format "epaint-%s-%s" prefix ext))))
(when (fboundp func)
(apply func args))))
;;; Canvas
(defclass epaint-canvas-class ()
((drawable :initarg :drawable :accessor drawable :type epaint-drawable)
(gc :initarg :gc :accessor gc :type epaint-gc)
(foreground :initarg :foreground :accessor foreground :type epaint-gc)
(background :initarg :background :accessor background :type epaint-gc)
(image :initarg :image :accessor image :type list)
(overlay :initarg :overlay :accessor overlay :type overlay)
(history :initarg :history :accessor history :type epaint-history
:initform (make-epaint-history))))
(cl-defmethod initialize-instance ((this epaint-canvas-class) &optional args)
(require (intern (concat "epaint-internal-format-"
(symbol-name epaint-internal-format))))
(epaint-plug-in-load-all)
;; (byte-compile-file (concat epaint-default-directory "epaint-draw.el") t)
;; (byte-compile-file (concat epaint-default-directory "epaint-canvas.el") t)
(cl-call-next-method this)
(let (gc-args)
(dolist (prop '(:width :height))
(when-let (value (plist-get args prop))
(setf gc-args (plist-put gc-args prop value))))
(setf (drawable this) (epaint-drawable-create 640 480)
(foreground this) (apply #'make-epaint-gc (cl-list* :color t gc-args))
(background this) (apply #'make-epaint-gc (cl-list* :color nil gc-args))
(gc this) (foreground this))
(epaint-create-image this :point (plist-get args :point))))
(cl-defmethod epaint-create-image ((this epaint-canvas-class) &key point)
(setf (image this) (epaint-drawable-create-image (drawable this)))
(epaint-put-image this :point point)
(epaint-push-history this t))
(cl-defmethod epaint-put-image ((this epaint-canvas-class) &key point)
(remove-images (point-min) (point-max))
(setf (overlay this) (put-image (image this) (or point (point-min))))
(image-flush (image this)))
(cl-defmethod epaint-clear-image ((this epaint-canvas-class) &optional need-query)
(when (or (not need-query) (y-or-n-p "Really clear?"))
(epaint-clear (drawable this) (background this))
(image-flush (image this))
(epaint-push-history this)))
(defun epaint-image-get-bitmap (image)
(plist-get (cdr image) :data))
(cl-defmethod epaint-push-history ((this epaint-canvas-class) &optional clear)
(with-slots (history) this
(when clear
(epaint-history-clear history))
(epaint-history-fork-current history
(copy-sequence (epaint-image-get-bitmap (image this))))
(set-buffer-modified-p (not (epaint-history-checkpoint-p history)))))
(defun epaint-image-set-bitmap (image bitmap)
(plist-put (cdr image) :data bitmap)
(image-flush image)
bitmap)
(cl-defmethod epaint-undo ((this epaint-canvas-class) &optional redo)
(with-slots (drawable image history) this
(when-let (bitmap (epaint-history-undo-current history redo))
(setf (epaint--bitmap drawable)
(epaint-image-set-bitmap image (copy-sequence bitmap))))
(set-buffer-modified-p (not (epaint-history-checkpoint-p history)))))
(cl-defmethod epaint-repair ((this epaint-canvas-class))
(epaint-bitmap-replace (epaint--bitmap (drawable this))
(epaint-history-current-data (history this)))
(image-flush (image this)))
(cl-defmethod epaint-force-window-update ((this epaint-canvas-class) &optional redisplay)
(image-flush (image this))
(force-window-update (get-buffer-window))
(when redisplay
(redisplay)))
(cl-defmethod epaint-down-mouse-1 ((this epaint-canvas-class) ev)
(let* ((history (history this))
(drawable (drawable this))
(gc (gc this))
(image (image this))
(position (event-start ev))
(x-y (posn-object-x-y position))
(x0 (car x-y))
(y0 (cdr x-y))
(sx x0)
(sy y0)
win obj x1 y1 x y clipped)
;; (setf (epaint-gc-current-x gc) sx
;; (epaint-gc-current-y gc) sy)
(track-mouse
(while (or (mouse-movement-p ev)
(member 'down (event-modifiers ev)))
(setq position (event-start ev)
win (posn-window position)
obj (posn-object position)
x-y (posn-object-x-y position)
x1 (car x-y)
y1 (cdr x-y)
x-y (posn-x-y position)
x (car x-y)
y (car x-y))
(when (or (not (eq (get-buffer-window) win))
(not (eq image obj))
(zerop x)
(zerop y))
(setq clipped t))
(when (and (eq (get-buffer-window) win)
(eq image obj)
(/= 0 x)
(/= 0 y))
(when clipped
(setq x0 x1
y0 y1
clipped nil))
(epaint-draw-funcall drawable gc
(epaint-history-current-data history)
sx sy x0 y0 x1 y1)
(epaint-force-window-update this))
(setq x0 x1
y0 y1)
(setq ev (read-event)))
(epaint-push-history this)
(setf (epaint-gc-current-x gc) x1
(epaint-gc-current-y gc) y1))))
(cl-defmethod epaint--read-or-write-file-done ((this epaint-canvas-class) prefix filename)
(let ((inhibit-read-only t))
(set-text-properties (point-min) (point-max) '(invisible t)))
(set-visited-file-name filename)
(set-buffer-modified-p nil)
(setq buffer-read-only t)
(force-mode-line-update)
(epaint-history-put-checkpoint (history this))
(message (concat prefix " file done. [%s]") filename))
(cl-defmethod epaint-read-file ((this epaint-canvas-class) filename)
(if-let (codec (epaint-plug-in-codec-get "read" filename))
(cl-multiple-value-bind (read-func filename) codec
(let ((inhibit-read-only t))
(erase-buffer)
(insert-file-contents filename))
(if (null (funcall read-func (drawable this)))
(message "File read failure.")
(epaint-create-image this))
(epaint--read-or-write-file-done this "read" filename))
(message "File read failure (unsupported format).")))
(cl-defmethod epaint-write-file ((this epaint-canvas-class) filename &optional ext)
(when (eq epaint-internal-format 'xbm)
(setf ext "xbm"))
(if-let (codec (epaint-plug-in-codec-get "write" filename ext))
(cl-multiple-value-bind (write-func filename) codec
(with-temp-file filename
(funcall write-func filename (drawable this)))
(epaint--read-or-write-file-done this "write" filename))
(message "Failure to file export (unsupported format).")))
(cl-defmethod epaint-write-back ((this epaint-canvas-class) filename &optional ext)
(when (eq epaint-internal-format 'xbm)
(setf ext "xbm"))
(when-let (codec (epaint-plug-in-codec-get "write" filename ext))
(cl-multiple-value-bind (write-func filename) codec
(let ((inhibit-read-only t))
(erase-buffer)
(funcall write-func filename (drawable this))
(set-text-properties (point-min) (point-max) '(invisible t))
(buffer-substring-no-properties (point-min) (point-max))))))
(cl-defmethod epaint-change-shape ((this epaint-canvas-class) shape-symbol)
(epaint-gc-change-shape (foreground this) shape-symbol)
(epaint-gc-change-shape (background this) shape-symbol)
(message "Changes the shape to %s." (symbol-name shape-symbol)))
(defconst epaint--rotate-colors [[255 64 64]
[64 255 64]
[64 64 255]])
(defvar epaint--rotate-color-index 0)
(cl-defmethod epaint-rotate-color ((this epaint-canvas-class))
(let ((color (aref epaint--rotate-colors epaint--rotate-color-index)))
(epaint-gc-set-color (foreground this) color)
(setf epaint--rotate-color-index (% (cl-incf epaint--rotate-color-index)
(length epaint--rotate-colors)))
(message "Changes the color to %s." color)))
(cl-defmethod epaint-set-pen-type-erase ((this epaint-canvas-class))
(setf (gc this) (if (eq (gc this) (foreground this))
(background this)
(foreground this)))
(message "Changes the pen type to %s." (if (eq (gc this) (foreground this)) "pen" "eraser")))
(cl-defmethod epaint-set-pen-size ((this epaint-canvas-class) pen-size)
(epaint-gc-set-pen-size (gc this) pen-size)
(message "Change the pen size to %s." pen-size))
(cl-defmethod epaint-benchmarks ((this epaint-canvas-class))
(cl-flet ((fill-test (drawable gc &optional loop-count)
(epaint-with-drawable (width height) drawable
(cl-loop for i below (or loop-count 100)
if (cl-evenp i)
do (epaint-with-timer "fill-test: epaint-clear"
(epaint-clear drawable gc)
(epaint-force-window-update this t))
else
do (epaint-with-timer "fill-test: epaint-set-pixel"
(let (y x)
(setq y 0)
(while (< y height)
(setq x 0)
(while (< x width)
(epaint-set-pixel drawable gc x y)
(cl-incf x))
(cl-incf y)))
(epaint-force-window-update this t))))))
(when (y-or-n-p "Run a benchmark?")
(message "fill-test ---")
(fill-test (drawable this) (gc this) 100)
(epaint-repair this))))
(provide 'epaint-canvas)
;;; epaint-canvas.el ends here