/usr/share/common-lisp/source/mcclim/graphics.lisp is in cl-mcclim 0.9.6.dfsg.cvs20100315-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 | ;;; -*- Mode: Lisp; Package: CLIM-INTERNALS -*-
;;; (c) copyright 1998,1999,2000,2001 by Michael McDonald (mikemac@mikemac.com)
;;; (c) copyright 2001 by Arnaud Rouanet (rouanet@emi.u-bordeaux.fr)
;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Library General Public
;;; License as published by the Free Software Foundation; either
;;; version 2 of the License, or (at your option) any later version.
;;;
;;; This library 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
;;; Library General Public License for more details.
;;;
;;; You should have received a copy of the GNU Library General Public
;;; License along with this library; if not, write to the
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;;; Boston, MA 02111-1307 USA.
(in-package :clim-internals)
;;; Work in progress that reduces consing of rest arguments and keyword
;;; processing.
(defmacro with-medium-and-options ((sheet
&key ink clipping-region transformation
line-unit line-thickness
line-style line-style-p
line-dashes dashes-p
line-joint-shape line-cap-shape
text-style text-style-p
text-family text-family-p
text-face text-face-p
text-size text-size-p)
(medium)
&body body)
(with-gensyms (continuation sheet-medium)
`(flet ((,continuation (,medium)
,@body))
(declare (dynamic-extent #',continuation))
(with-sheet-medium (,sheet-medium ,sheet)
(do-graphics-with-options-internal-1
,sheet-medium #'continuation
,ink ,clipping-region ,transformation
,line-unit ,line-thickness
,line-style ,line-style-p
,line-dashes ,dashes-p
,line-joint-shape ,line-cap-shape
,text-style ,text-style-p
,text-family ,text-family-p
,text-face ,text-face-p
,text-size ,text-size-p))))
)
(defmethod do-graphics-with-options ((sheet sheet) func &rest options)
(with-sheet-medium (medium sheet)
(apply #'do-graphics-with-options-internal medium sheet func options)))
(defmethod do-graphics-with-options ((medium medium) func &rest options)
(apply #'do-graphics-with-options-internal medium medium func options))
(defmethod do-graphics-with-options ((sheet t) func &rest options)
(declare (ignore options))
(if sheet
(funcall func sheet)))
(defmethod do-graphics-with-options ((pixmap pixmap) func &rest options)
(with-pixmap-medium (medium pixmap)
(apply #'do-graphics-with-options-internal medium medium func options)))
(defmethod do-graphics-with-options-internal ((medium medium) orig-medium func
&rest args
&key ink clipping-region transformation
line-unit line-thickness
(line-style nil line-style-p)
(line-dashes nil dashes-p)
line-joint-shape line-cap-shape
(text-style nil text-style-p)
(text-family nil text-family-p)
(text-face nil text-face-p)
(text-size nil text-size-p)
&allow-other-keys)
(declare (ignore args))
(let ((old-ink (medium-ink medium))
(old-clip (medium-clipping-region medium))
(old-transform (medium-transformation medium))
(old-line-style (medium-line-style medium))
(old-text-style (medium-text-style medium))
(changed-line-style line-style-p)
(changed-text-style text-style-p))
(unwind-protect
(progn
(when (eq ink old-ink) (setf ink nil))
(when ink
(setf (medium-ink medium) ink))
(when transformation
(setf (medium-transformation medium)
(compose-transformations old-transform transformation)))
(when (and clipping-region old-clip
(or (eq clipping-region +everywhere+)
(eq clipping-region old-clip)
(region-contains-region-p clipping-region old-clip))
#+NIL (region-equal clipping-region old-clip))
(setf clipping-region nil))
(when clipping-region
(setf (medium-clipping-region medium)
(region-intersection (if transformation
(transform-region transformation old-clip)
old-clip)
clipping-region)))
(when (null line-style)
(setf line-style old-line-style))
(when (or line-unit line-thickness dashes-p line-joint-shape line-cap-shape)
(setf changed-line-style t)
(setf line-style (make-line-style
:unit (or line-unit
(line-style-unit line-style))
:thickness (or line-thickness
(line-style-thickness line-style))
:dashes (or line-dashes
(line-style-dashes line-style))
:joint-shape (or line-joint-shape
(line-style-joint-shape line-style))
:cap-shape (or line-cap-shape
(line-style-cap-shape line-style)))))
(when changed-line-style
(setf (medium-line-style medium) line-style))
(if text-style-p
(setf text-style (merge-text-styles text-style
(medium-merged-text-style medium)))
(setf text-style (medium-merged-text-style medium)))
(when (or text-family-p text-face-p text-size-p)
(setf changed-text-style t)
(setf text-style (merge-text-styles (make-text-style text-family
text-face
text-size)
text-style)))
(when changed-text-style
(setf (medium-text-style medium) text-style))
(when orig-medium
(funcall func orig-medium)))
(when ink
(setf (medium-ink medium) old-ink))
;; First set transformation, then clipping!
(when transformation
(setf (medium-transformation medium) old-transform))
(when clipping-region
(setf (medium-clipping-region medium) old-clip))
(when changed-line-style
(setf (medium-line-style medium) old-line-style))
(when changed-text-style
(setf (medium-text-style medium) old-text-style)))))
(defmacro with-medium-options ((sheet args)
&body body)
`(flet ((graphics-op (medium)
(declare (ignorable medium))
,@body))
#-clisp (declare (dynamic-extent #'graphics-op))
(apply #'do-graphics-with-options ,sheet #'graphics-op ,args)))
(defmacro with-drawing-options ((medium &rest drawing-options) &body body)
(setq medium (stream-designator-symbol medium '*standard-output*))
(with-gensyms (gcontinuation cont-arg)
`(flet ((,gcontinuation (,cont-arg)
(declare (ignore ,cont-arg))
,@body))
#-clisp (declare (dynamic-extent #',gcontinuation))
(apply #'invoke-with-drawing-options
,medium #',gcontinuation (list ,@drawing-options)))))
(defmethod invoke-with-drawing-options ((medium medium) continuation
&rest drawing-options
&key ink transformation clipping-region
line-style text-style
&allow-other-keys)
(declare (ignore ink transformation clipping-region line-style text-style))
(with-medium-options (medium drawing-options)
(funcall continuation medium)))
(defmethod invoke-with-drawing-options ((sheet sheet) continuation &rest drawing-options)
(with-sheet-medium (medium sheet)
(with-medium-options (medium drawing-options)
(funcall continuation medium))))
;;; Compatibility with real CLIM
(defmethod invoke-with-drawing-options ((sheet t) continuation
&rest drawing-options)
(declare (ignore drawing-options))
(funcall continuation sheet))
(defmethod invoke-with-identity-transformation
((sheet sheet) continuation)
(with-sheet-medium (medium sheet)
(letf (((medium-transformation medium) +identity-transformation+))
(funcall continuation sheet))))
(defmethod invoke-with-identity-transformation
((destination pixmap) continuation)
(with-pixmap-medium (medium destination)
(letf (((medium-transformation medium) +identity-transformation+))
(funcall continuation destination))))
(defmethod invoke-with-identity-transformation
((medium medium) continuation)
(letf (((medium-transformation medium) +identity-transformation+))
(funcall continuation medium)))
(defmethod invoke-with-local-coordinates (medium cont x y)
;; For now we do as real CLIM does.
;; Default seems to be the cursor position.
;; Moore suggests we use (0,0) if medium is no stream.
;;
;; Further the specification is vague about possible scalings ...
;;
(unless (and x y)
(multiple-value-bind (cx cy) (if (extended-output-stream-p medium)
(stream-cursor-position medium)
(values 0 0))
(setf x (or x cx)
y (or y cy))))
(multiple-value-bind (mxx mxy myy myx tx ty)
(get-transformation (medium-transformation medium))
(declare (ignore tx ty))
(with-identity-transformation (medium)
(with-drawing-options
(medium :transformation (make-transformation
mxx mxy myy myx
x y))
(funcall cont medium)))))
(defmethod invoke-with-first-quadrant-coordinates (medium cont x y)
;; First we do the same as invoke-with-local-coordinates but rotate and
;; deskew it so that it becomes first-quadrant. We do this
;; by simply measuring the length of the transfomed x and y "unit vectors".
;; [That is (0,0)-(1,0) and (0,0)-(0,1)] and setting up a transformation
;; which features an upward pointing y-axis and a right pointing x-axis with
;; a length equal to above measured vectors.
(unless (and x y)
(multiple-value-bind (cx cy) (if (extended-output-stream-p medium)
(stream-cursor-position medium)
(values 0 0))
(setf x (or x cx)
y (or y cy))))
(let* ((tr (medium-transformation medium))
(xlen
(multiple-value-bind (dx dy) (transform-distance tr 1 0)
(sqrt (+ (expt dx 2) (expt dy 2)))))
(ylen
(multiple-value-bind (dx dy) (transform-distance tr 0 1)
(sqrt (+ (expt dx 2) (expt dy 2))))))
(with-identity-transformation (medium)
(with-drawing-options
(medium :transformation (make-transformation
xlen 0 0 (- ylen)
x y))
(funcall cont medium)))))
(defun draw-point (sheet point
&rest args
&key ink clipping-region transformation
line-style line-thickness line-unit)
(declare (ignore ink clipping-region transformation
line-style line-thickness line-unit))
(with-medium-options (sheet args)
(multiple-value-bind (x y) (point-position point)
(medium-draw-point* medium x y))))
(defun draw-point* (sheet x y
&rest args
&key ink clipping-region transformation
line-style line-thickness line-unit)
(declare (ignore ink clipping-region transformation
line-style line-thickness line-unit))
(with-medium-options (sheet args)
(medium-draw-point* medium x y)))
(defun expand-point-seq (point-seq)
(let ((coord-seq nil))
(do-sequence (point point-seq)
(multiple-value-bind (x y) (point-position point)
(setq coord-seq (list* y x coord-seq))))
(nreverse coord-seq)))
(defun draw-points (sheet point-seq
&rest args
&key ink clipping-region transformation
line-style line-thickness line-unit)
(declare (ignore ink clipping-region transformation
line-style line-thickness line-unit))
(with-medium-options (sheet args)
(medium-draw-points* medium (expand-point-seq point-seq))))
(defun draw-points* (sheet coord-seq
&rest args
&key ink clipping-region transformation
line-style line-thickness line-unit)
(declare (ignore ink clipping-region transformation
line-style line-thickness line-unit))
(with-medium-options (sheet args)
(medium-draw-points* medium coord-seq)))
(defun draw-line (sheet point1 point2
&rest args
&key ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(multiple-value-bind (x1 y1) (point-position point1)
(multiple-value-bind (x2 y2) (point-position point2)
(medium-draw-line* medium x1 y1 x2 y2)))))
(defun draw-line* (sheet x1 y1 x2 y2
&rest args
&key ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(medium-draw-line* medium x1 y1 x2 y2)))
(defun draw-lines (sheet point-seq
&rest args
&key ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(medium-draw-lines* medium (expand-point-seq point-seq))))
(defun draw-lines* (sheet coord-seq
&rest args
&key ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(medium-draw-lines* medium coord-seq)))
(defun draw-polygon (sheet point-seq
&rest args
&key (filled t) (closed t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape line-cap-shape))
(with-medium-options (sheet args)
(medium-draw-polygon* medium (expand-point-seq point-seq) closed filled)))
(defun draw-polygon* (sheet coord-seq
&rest args
&key (filled t) (closed t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape line-cap-shape))
(with-medium-options (sheet args)
(medium-draw-polygon* medium coord-seq closed filled)))
(defun draw-rectangle (sheet point1 point2
&rest args
&key (filled t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape))
(with-medium-options (sheet args)
(multiple-value-bind (x1 y1) (point-position point1)
(multiple-value-bind (x2 y2) (point-position point2)
(medium-draw-rectangle* medium x1 y1 x2 y2 filled)))))
(defun draw-rectangle* (sheet x1 y1 x2 y2
&rest args
&key (filled t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape))
(with-medium-options (sheet args)
(medium-draw-rectangle* medium x1 y1 x2 y2 filled)))
(defun draw-rectangles (sheet points
&rest args
&key (filled t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape))
(with-medium-options (sheet args)
(loop for point in points
nconcing (multiple-value-bind (x y) (point-position point)
(list x y)) into position-seq
finally (medium-draw-rectangles* medium position-seq filled))))
(defun draw-rectangles* (sheet position-seq
&rest args
&key (filled t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape))
(with-medium-options (sheet args)
(medium-draw-rectangles* medium position-seq filled)))
(defun draw-triangle (sheet point1 point2 point3
&rest args
&key (filled t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape))
(apply #'draw-polygon sheet (list point1 point2 point3) :filled filled :closed t args))
(defun draw-triangle* (sheet x1 y1 x2 y2 x3 y3
&rest args
&key (filled t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape))
(apply #'draw-polygon* sheet (list x1 y1 x2 y2 x3 y3) :filled filled :closed t args))
(defun draw-ellipse (sheet
center-point
radius-1-dx radius-1-dy radius-2-dx radius-2-dy
&rest args
&key (filled t) (start-angle 0.0) (end-angle (* 2.0 pi))
ink clipping-region transformation
line-style line-thickness line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(multiple-value-bind (center-x center-y) (point-position center-point)
(medium-draw-ellipse* medium
center-x center-y
radius-1-dx radius-1-dy radius-2-dx radius-2-dy
start-angle end-angle filled))))
(defun draw-ellipse* (sheet
center-x center-y
radius-1-dx radius-1-dy radius-2-dx radius-2-dy
&rest args
&key (filled t) (start-angle 0.0) (end-angle (* 2.0 pi))
ink clipping-region transformation
line-style line-thickness line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(medium-draw-ellipse* medium
center-x center-y
radius-1-dx radius-1-dy radius-2-dx radius-2-dy
start-angle end-angle filled)))
(defun draw-circle (sheet
center-point radius
&rest args
&key (filled t) (start-angle 0.0) (end-angle (* 2.0 pi))
ink clipping-region transformation
line-style line-thickness line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(multiple-value-bind (center-x center-y) (point-position center-point)
(medium-draw-ellipse* medium
center-x center-y
radius 0 0 radius
start-angle end-angle filled))))
(defun draw-circle* (sheet
center-x center-y radius
&rest args
&key (filled t) (start-angle 0.0) (end-angle (* 2.0 pi))
ink clipping-region transformation
line-style line-thickness line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(medium-draw-ellipse* medium
center-x center-y
radius 0 0 radius
start-angle end-angle filled)))
(defun draw-text (sheet string point
&rest args
&key (start 0) (end nil)
(align-x :left) (align-y :baseline)
(toward-point nil toward-point-p)
transform-glyphs
ink clipping-region transformation
text-style text-family text-face text-size)
(declare (ignore ink clipping-region transformation
text-style text-family text-face text-size))
(with-medium-options (sheet args)
(multiple-value-bind (x y) (point-position point)
(multiple-value-bind (toward-x toward-y)
(if toward-point-p
(point-position toward-point)
(values (1+ x) y))
(medium-draw-text* medium string x y
start end
align-x align-y
toward-x toward-y transform-glyphs)))))
(defun draw-text* (sheet string x y
&rest args
&key (start 0) (end nil)
(align-x :left) (align-y :baseline)
(toward-x (1+ x)) (toward-y y) transform-glyphs
ink clipping-region transformation
text-style text-family text-face text-size)
(declare (ignore ink clipping-region transformation
text-style text-family text-face text-size))
(with-medium-options (sheet args)
(medium-draw-text* medium string x y
start end
align-x align-y
toward-x toward-y transform-glyphs)))
;; This function belong to the extensions package.
(defun draw-glyph (sheet string x y
&rest args
&key (align-x :left) (align-y :baseline)
toward-x toward-y transform-glyphs
ink clipping-region transformation
text-style text-family text-face text-size)
"Draws a single character of filled text represented by the given
element. element is a character or other object to be translated
into a font index. The given x and y specify the left baseline
position for the character."
(declare (ignore ink clipping-region transformation
text-style text-family text-face text-size))
(with-medium-options (sheet args)
(medium-draw-glyph medium string x y
align-x align-y
toward-x toward-y transform-glyphs)))
(defun draw-arrow (sheet point-1 point-2
&rest args
&key ink clipping-region transformation
line-style line-thickness
line-unit line-dashes line-cap-shape
(to-head t) from-head (head-length 10) (head-width 5))
(declare (ignore ink clipping-region transformation
line-style line-thickness
line-unit line-dashes line-cap-shape
to-head from-head head-length head-width))
(multiple-value-bind (x1 y1) (point-position point-1)
(multiple-value-bind (x2 y2) (point-position point-2)
(apply #'draw-arrow* sheet x1 y1 x2 y2 args))))
(defun draw-arrow* (sheet x1 y1 x2 y2
&rest args
&key ink clipping-region transformation
line-style line-thickness
line-unit line-dashes line-cap-shape
(to-head t) from-head (head-length 10) (head-width 5))
(declare (ignore ink clipping-region transformation
line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(with-translation (sheet x2 y2)
(with-rotation (sheet (atan* (- x1 x2)
(- y1 y2)))
(let* ((end 0.0)
(start (sqrt (+ (expt (- x2 x1) 2)
(expt (- y2 y1) 2))))
(p end)
(q start)
(line-style (medium-line-style sheet))
;; FIXME: I believe this thickness is in "line-style-units",
;; which are only coincidentally the same as pixel coorindates
;; on screen backends, using :normal units. There is no function
;; documented for converting the units to stream coordinates.
(thickness (multiple-value-bind (dx dy)
(transform-distance (invert-transformation (medium-transformation sheet))
(line-style-thickness line-style)
0)
(sqrt (+ (* dx dx) (* dy dy)))))
(width/2 (/ head-width 2))
(a (atan (/ width/2 head-length)))
(offset (if (and head-length (not (zerop head-length)))
(/ thickness (* 2 (sin a )))
0.0))
(tip-to-peak (+ head-length offset (- (* thickness 0.5 (sin a)))))) ;; okay, a guess..
(when to-head (incf p offset))
(when from-head (decf q offset))
(if (and to-head
from-head
(< (abs (- start end)) (* 2 tip-to-peak)))
(let ((width (* 0.5 (+ head-width thickness)
(/ (abs (- start end))
(* 2 tip-to-peak)) )))
(draw-polygon* sheet
(list end 0
(/ start 2) width
start 0
(/ start 2) (- width))
:filled t
:line-thickness 0))
(progn
(when to-head
(draw-polygon* sheet
(list (+ p head-length) (- width/2)
p 0
(+ p head-length) width/2)
:filled nil
:closed nil))
(when from-head
(draw-polygon* sheet
(list (- q head-length) (- width/2)
q 0
(- q head-length) width/2)
:filled nil
:closed nil))
(unless (< q p)
(draw-line* sheet q 0 p 0)))) )))))
(defun draw-oval (sheet center-pt x-radius y-radius
&rest args
&key (filled t) ink clipping-region transformation
line-style line-thickness line-unit line-dashes line-cap-shape)
(declare (ignore filled ink clipping-region transformation
line-style line-thickness
line-unit line-dashes line-cap-shape))
(multiple-value-bind (x1 y1) (point-position center-pt)
(apply #'draw-oval* sheet x1 y1 x-radius y-radius args)))
(defun draw-oval* (sheet center-x center-y x-radius y-radius
&rest args
&key (filled t) ink clipping-region transformation
line-style line-thickness line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation
line-style line-thickness
line-unit line-dashes line-cap-shape))
(check-type x-radius (real 0))
(check-type y-radius (real 0))
(if (or (coordinate= x-radius 0) (coordinate= y-radius 0))
(draw-circle* sheet center-x center-y (max x-radius y-radius)
:filled filled)
(with-medium-options (sheet args)
(if (coordinate<= y-radius x-radius)
(let ((x1 (- center-x x-radius)) (x2 (+ center-x x-radius))
(y1 (- center-y y-radius)) (y2 (+ center-y y-radius)))
(if filled
;; Kludge coordinates, sometimes due to rounding the lines don't connect.
(draw-rectangle* sheet (floor x1) y1 (ceiling x2) y2)
(draw-lines* sheet (list (floor x1) y1 (ceiling x2) y1
(floor x1) y2 (ceiling x2) y2)))
(draw-circle* sheet x1 center-y y-radius
:filled filled
:start-angle (* pi 0.5)
:end-angle (* pi 1.5))
(draw-circle* sheet x2 center-y y-radius
:filled filled
:start-angle (* pi 1.5)
:end-angle (* pi 2.5)))
(with-rotation (sheet (/ pi 2) (make-point center-x center-y))
(draw-oval* sheet center-x center-y y-radius x-radius
:filled filled)) ))))
;;; Pixmap functions
(defmethod copy-to-pixmap ((medium medium) medium-x medium-y width height
&optional pixmap (pixmap-x 0) (pixmap-y 0))
(unless pixmap
(setq pixmap (allocate-pixmap medium (+ pixmap-x width) (+ pixmap-y height))))
(medium-copy-area medium medium-x medium-y width height
pixmap pixmap-x pixmap-y)
pixmap)
(defmethod copy-to-pixmap ((sheet sheet) sheet-x sheet-y width height
&optional pixmap (pixmap-x 0) (pixmap-y 0))
(copy-to-pixmap (sheet-medium sheet) sheet-x sheet-y width height
pixmap pixmap-x pixmap-y))
(defmethod copy-from-pixmap (pixmap pixmap-x pixmap-y width height
(medium medium) medium-x medium-y)
(medium-copy-area pixmap pixmap-x pixmap-y width height
medium medium-x medium-y)
pixmap)
(defmethod copy-from-pixmap (pixmap pixmap-x pixmap-y width height
(sheet sheet) sheet-x sheet-y)
(medium-copy-area pixmap pixmap-x pixmap-y width height
(sheet-medium sheet) sheet-x sheet-y))
(defmethod copy-area ((medium medium) from-x from-y width height to-x to-y)
(medium-copy-area medium from-x from-y width height
medium to-x to-y))
(defmethod copy-area ((sheet sheet) from-x from-y width height to-x to-y)
(copy-area (sheet-medium sheet) from-x from-y width height to-x to-y))
(defmethod copy-area ((stream stream) from-x from-y width height to-x to-y)
(if (sheetp stream)
(copy-area (sheet-medium stream) from-x from-y width height to-x to-y)
(error "COPY-AREA on a stream is not implemented")))
;;; XXX The modification of the sheet argument to hold the pixmap medium seems
;;; completely incorrect here; the description of the macro in the spec says
;;; nothing about that. On the other hand, the spec talks about "medium-var"
;;; when that is clearly meant to be a stream (and an output-recording stream
;;; at that, if the example in the Franz user guide is to be believed). What a
;;; mess. I think we need a pixmap output recording stream in order to do this
;;; right. -- moore
(defmacro with-output-to-pixmap ((medium-var sheet &key width height) &body body)
(if (and width height)
`(let* ((pixmap (allocate-pixmap ,sheet ,width ,height))
(,medium-var (make-medium (port ,sheet) pixmap))
(old-medium (sheet-medium ,sheet)))
(setf (slot-value pixmap 'medium) ,medium-var) ; hmm, [seems to work] -- BTS
(setf (%sheet-medium ,sheet) ,medium-var) ;is sheet a sheet-with-medium-mixin? --GB
(unwind-protect
(progn ,@body)
(setf (%sheet-medium ,sheet) old-medium)) ;is sheet a sheet-with-medium-mixin? --GB
pixmap)
(let ((record (gensym "OUTPUT-RECORD-")))
;; rudi (2005-09-05) What to do when only width or height are
;; given? And what's the meaning of medium-var?
`(let* ((,medium-var ,sheet)
(,record (with-output-to-output-record (,medium-var)
,@body)))
(with-output-to-pixmap
(,medium-var
,sheet
:width ,(or width `(bounding-rectangle-width ,record))
:height ,(or height `(bounding-rectangle-height ,record)))
(replay-output-record ,record ,sheet))))))
;;; XXX This seems to be incorrect.
;;; This presumes that your drawing will completely fill the bounding rectangle
;;; of the sheet and will effectively randomize anything that isn't drawn
;;; within it.
;;; FIXME
#+nil
(defmacro with-double-buffering ((sheet) &body body)
(let ((width (gensym))
(height (gensym))
(pixmap (gensym))
(sheet-mirror (gensym)))
`(let* ((,width (round (bounding-rectangle-width (sheet-region ,sheet))))
(,height (round (bounding-rectangle-height (sheet-region ,sheet))))
(,(gensym) (progn (format *debug-io* "w-d-b ~A ~A~%" ,width ,height) (finish-output *debug-io*) 0))
(,pixmap (allocate-pixmap ,sheet ,width ,height))
(,sheet-mirror (sheet-direct-mirror ,sheet)))
(unwind-protect
(progn
(setf (sheet-direct-mirror ,sheet) (pixmap-mirror ,pixmap))
,@body
(setf (sheet-direct-mirror ,sheet) ,sheet-mirror)
; v-- the sheet might have been degrafted while we weren't looking
; in which case, we shouldn't blit it back
(copy-from-pixmap ,pixmap 0 0 ,width ,height ,sheet 0 0))
(deallocate-pixmap ,pixmap)))))
;;; Another attempt
(defun invoke-with-double-buffering (sheet continuation x1 y1 x2 y2)
(let* ((medium (sheet-medium sheet))
(sheet-transform (sheet-native-transformation sheet))
(medium-transform (medium-transformation (sheet-medium sheet)))
(world-transform (compose-transformations sheet-transform
medium-transform)))
(multiple-value-bind (sheet-x1 sheet-y1)
(transform-position world-transform x1 y1)
(multiple-value-bind (sheet-x2 sheet-y2)
(transform-position world-transform x2 y2)
;; Be conservative with the size of the pixmap, including all of
;; the pixels at the edges.
(let* ((pixmap-x1 (floor sheet-x1))
(pixmap-y1 (floor sheet-y1))
(pixmap-x2 (ceiling sheet-x2))
(pixmap-y2 (ceiling sheet-y2))
(pixmap-width (- pixmap-x2 pixmap-x1))
(pixmap-height (- pixmap-y2 pixmap-y1))
(current-sheet-region (sheet-region sheet))
(sheet-native (compose-transformation-with-translation
sheet-transform
(- pixmap-x1)
(- pixmap-y1)))
(pixmap (allocate-pixmap sheet pixmap-width pixmap-height))
)
(unless pixmap
(error "Couldn't allocate pixmap"))
(multiple-value-bind (user-pixmap-x1 user-pixmap-y1)
(untransform-position world-transform pixmap-x1 pixmap-y1)
(multiple-value-bind (user-pixmap-x2 user-pixmap-y2)
(untransform-position world-transform pixmap-x2 pixmap-y2)
(flet ((set-native (transform region sheet)
(%%set-sheet-native-transformation transform sheet)
(setf (slot-value sheet 'region) region)
(invalidate-cached-regions sheet)
(invalidate-cached-transformations sheet)))
;; Assume that the scaling for the sheet-native
;; transformation for the pixmap will be the same as that of
;; the mirror .
(unwind-protect
(letf (((sheet-parent sheet) nil)
((sheet-direct-mirror sheet)
(pixmap-mirror pixmap)))
(unwind-protect
(let ((pixmap-region
(make-bounding-rectangle user-pixmap-x1
user-pixmap-y1
user-pixmap-x2
user-pixmap-y2)))
(set-native sheet-native pixmap-region sheet)
;(break)
(with-drawing-options
(medium :ink (medium-background medium))
(medium-draw-rectangle* medium
user-pixmap-x1
user-pixmap-y1
user-pixmap-x2
user-pixmap-y2
t))
(funcall continuation sheet
user-pixmap-x1 user-pixmap-y1
user-pixmap-x2 user-pixmap-y2))
(set-native sheet-transform
current-sheet-region
sheet)))
(copy-from-pixmap pixmap 0 0
pixmap-width pixmap-height sheet
user-pixmap-x1 user-pixmap-y1)
(deallocate-pixmap pixmap))))))))))
(defmacro with-double-buffering (((sheet &rest bounds-args)
(&rest pixmap-args))
&body body)
(with-gensyms (continuation)
(let ((cont-form
(case (length pixmap-args)
(1
(with-gensyms (pixmap-x1 pixmap-y1 pixmap-x2 pixmap-y2)
`(,continuation (,sheet
,pixmap-x1 ,pixmap-y1 ,pixmap-x2 ,pixmap-y2)
(let ((,(car pixmap-args)
(make-bounding-rectangle ,pixmap-x1 ,pixmap-y1
,pixmap-x2 ,pixmap-y2)))
,@body))))
(4
`(,continuation (,sheet ,@pixmap-args)
,@body))
(otherwise (error "Invalid pixmap-args ~S" pixmap-args)))))
(case (length bounds-args)
(1
(with-gensyms (x1 y1 x2 y2)
`(flet (,cont-form)
(declare (dynamic-extent #',continuation))
(with-bounding-rectangle* (,x1 ,y1 ,x2 ,y2)
,(car bounds-args)
(invoke-with-double-buffering ,sheet
#',continuation
,x1 ,y1 ,x2 ,y2)))))
(4
`(flet (,cont-form)
(declare (dynamic-extent #',continuation))
(invoke-with-double-buffering ,sheet #',continuation
,@bounds-args)))
(otherwise (error "invalid bounds-args ~S" bounds-args))))))
;;; Generic graphic operation methods
(defmacro def-graphic-op (name (&rest args))
(let ((method-name (symbol-concat '#:medium- name '*)))
`(eval-when (:execute :load-toplevel :compile-toplevel)
(defmethod ,method-name ((stream sheet) ,@args)
(with-sheet-medium (medium stream)
(,method-name medium ,@args))))))
(def-graphic-op draw-point (x y))
(def-graphic-op draw-points (coord-seq))
(def-graphic-op draw-line (x1 y1 x2 y2))
(def-graphic-op draw-lines (coord-seq))
(def-graphic-op draw-polygon (coord-seq closed filled))
(def-graphic-op draw-rectangle (left top right bottom filled))
(def-graphic-op draw-rectangles (position-seq filled))
(def-graphic-op draw-ellipse (center-x center-y
radius-1-dx radius-1-dy radius-2-dx radius-2-dy
start-angle end-angle filled))
(def-graphic-op draw-circle (center-x center-y radius start-angle end-angle filled))
(def-graphic-op draw-text (string x y
start end
align-x align-y
toward-x toward-y transform-glyphs))
;;; Some image junk...
(defmethod medium-free-image-design ((sheet sheet-with-medium-mixin) design)
(medium-free-image-design (sheet-medium sheet) design))
(defmethod medium-draw-image-design* :before (current-medium design x y)
(with-slots (medium medium-data) design
(unless (eq medium current-medium)
(when medium
(medium-free-image-design medium design))
(setf medium current-medium)
(setf medium-data nil))))
(defmethod medium-draw-image-design*
((medium sheet-with-medium-mixin) design x y)
(medium-draw-image-design* (sheet-medium medium) design x y))
;;;;
;;;; DRAW-DESIGN
;;;;
(defmethod draw-design (medium (design point) &rest options &key &allow-other-keys)
(apply #'draw-point* medium (point-x design) (point-y design) options))
(defmethod draw-design (medium (design polyline) &rest options &key &allow-other-keys)
(apply #'draw-polygon medium (polygon-points design)
:closed (polyline-closed design)
:filled nil
options))
(defmethod draw-design (medium (design polygon) &rest options &key &allow-other-keys)
(apply #'draw-polygon medium (polygon-points design)
:closed (polyline-closed design)
:filled t
options))
(defmethod draw-design (medium (design line) &rest options &key &allow-other-keys)
(multiple-value-bind (x1 y1) (line-start-point* design)
(multiple-value-bind (x2 y2) (line-end-point* design)
(apply #'draw-line* medium x1 y1 x2 y2 options))))
(defmethod draw-design (medium (design rectangle) &rest options &key &allow-other-keys)
(multiple-value-bind (x1 y1 x2 y2) (rectangle-edges* design)
(apply #'draw-rectangle* medium x1 y1 x2 y2 options)))
(defmethod draw-design (medium (design ellipse) &rest options &key &allow-other-keys)
(multiple-value-bind (cx cy) (ellipse-center-point* design)
(multiple-value-bind (r1x r1y r2x r2y) (ellipse-radii design)
(multiple-value-call #'draw-ellipse* medium
cx cy r1x r1y r2x r2y
:start-angle (ellipse-start-angle design)
:end-angle (ellipse-end-angle design)
options))))
(defmethod draw-design (medium (design elliptical-arc) &rest options &key &allow-other-keys)
(multiple-value-bind (cx cy) (ellipse-center-point* design)
(multiple-value-bind (r1x r1y r2x r2y) (ellipse-radii design)
(multiple-value-call #'draw-ellipse* medium
cx cy r1x r1y r2x r2y
:start-angle (ellipse-start-angle design)
:end-angle (ellipse-end-angle design)
:filled nil
options))))
(defmethod draw-design (medium (design standard-region-union) &rest options &key &allow-other-keys)
(map-over-region-set-regions (lambda (region)
(apply #'draw-design medium region options))
design))
(defmethod draw-design (medium (design standard-rectangle-set) &rest options &key &allow-other-keys)
;; ### we can do better (faster) than this.
(map-over-region-set-regions (lambda (region)
(apply #'draw-design medium region options))
design))
#+nyi
(defmethod draw-design (medium (design standard-region-intersection) &rest options &key &allow-other-keys)
)
#+nyi
(defmethod draw-design (medium (design standard-region-difference) &rest options &key &allow-other-keys)
)
(defmethod draw-design (medium (design (eql +nowhere+)) &rest options &key &allow-other-keys)
(declare (ignore medium options)
(ignorable design))
nil)
(defmethod draw-design ((medium sheet) (design (eql +everywhere+)) &rest options &key &allow-other-keys)
(apply #'draw-design medium (bounding-rectangle (sheet-region medium)) options))
(defmethod draw-design ((medium medium) (design (eql +everywhere+)) &rest options &key &allow-other-keys)
(apply #'draw-design medium (bounding-rectangle (sheet-region (medium-sheet medium))) options))
;;;
(defmethod draw-design (medium (color color) &rest options &key &allow-other-keys)
(apply #'draw-design medium +everywhere+ :ink color options))
(defmethod draw-design (medium (color opacity) &rest options &key &allow-other-keys)
(apply #'draw-design medium +everywhere+ :ink color options))
(defmethod draw-design (medium (color standard-flipping-ink) &rest options &key &allow-other-keys)
(apply #'draw-design medium +everywhere+ :ink color options))
(defmethod draw-design (medium (color indirect-ink) &rest options &key &allow-other-keys)
(apply #'draw-design medium +everywhere+ :ink color options))
;;;;
(defmethod draw-design
(medium (design rgb-image-design) &rest options
&key (x 0) (y 0) &allow-other-keys)
(with-medium-options (medium options)
(medium-draw-image-design* medium design x y))
(values))
;;;;
(defmethod draw-design (medium (pattern pattern) &key clipping-region transformation
&allow-other-keys)
(draw-pattern* medium pattern 0 0
:clipping-region clipping-region :transformation transformation))
(defun draw-pattern* (medium pattern x y &key clipping-region transformation)
;; Note: I believe the sample implementation in the spec is incorrect.
;; --GB
(check-type pattern pattern)
(cond ((or clipping-region transformation)
(with-drawing-options (medium :clipping-region clipping-region
:transformation transformation)
;; Now this is totally bogus.
(medium-draw-pattern* medium pattern x y) ))
(t
;; What happens if there is already a transformation
;; applied to the medium?
(medium-draw-pattern* medium pattern x y))))
(defmethod medium-draw-pattern* (medium pattern x y)
(let ((width (pattern-width pattern))
(height (pattern-height pattern)))
;; As I read the spec, the pattern itself is not transformed, so
;; we should draw the full (untransformed) pattern at the tranformed
;; x/y coordinates. This requires we revert to the identity transformation
;; before drawing the rectangle. -Hefner
(with-transformed-position ((medium-transformation medium) x y)
(with-identity-transformation (medium)
#+NIL ;; debugging aid.
(draw-rectangle* medium x y (+ x width) (+ y height)
:filled t
:ink +red+)
(draw-rectangle* medium x y (+ x width) (+ y height)
:filled t
:ink (transform-region
(make-translation-transformation x y)
pattern))))))
(defun draw-rounded-rectangle* (sheet x1 y1 x2 y2
&rest args &key
(radius 7)
(radius-x radius)
(radius-y radius)
(radius-left radius-x)
(radius-right radius-x)
(radius-top radius-y)
(radius-bottom radius-y)
filled &allow-other-keys)
"Draw a rectangle with rounded corners"
(apply #'invoke-with-drawing-options sheet
(lambda (medium)
(declare (ignore medium))
(let ((medium sheet))
(if (not (and (>= (- x2 x1) (* 2 radius-x))
(>= (- y2 y1) (* 2 radius-y))))
(draw-rectangle* medium x1 y1 x2 y2)
(with-grown-rectangle* ((ix1 iy1 ix2 iy2) (x1 y1 x2 y2)
:radius-left (- radius-left)
:radius-right (- radius-right)
:radius-top (- radius-top)
:radius-bottom (- radius-bottom))
(let ((zl (zerop radius-left))
(zr (zerop radius-right))
(zt (zerop radius-top))
(zb (zerop radius-bottom)))
(if filled
(progn ; Filled
(unless (or zl zt)
(draw-ellipse* medium ix1 iy1 radius-left 0 0 radius-top :filled t))
(unless (or zr zt)
(draw-ellipse* medium ix2 iy1 radius-right 0 0 radius-top :filled t))
(unless (or zl zb)
(draw-ellipse* medium ix1 iy2 radius-left 0 0 radius-bottom :filled t))
(unless (or zr zb)
(draw-ellipse* medium ix2 iy2 radius-right 0 0 radius-bottom :filled t))
(draw-rectangle* medium x1 iy1 x2 iy2 :filled t)
(draw-rectangle* medium ix1 y1 ix2 iy1 :filled t)
(draw-rectangle* medium ix1 iy2 ix2 y2 :filled t))
(progn ; Unfilled
(unless (or zl zt)
(draw-ellipse* medium ix1 iy1 (- radius-left) 0 0 (- radius-top)
:start-angle (/ pi 2) :end-angle pi
:filled nil))
(unless (or zr zt)
(draw-ellipse* medium ix2 iy1 (- radius-right) 0 0 (- radius-top)
:start-angle 0 :end-angle (/ pi 2)
:filled nil))
(unless (or zl zb)
(draw-ellipse* medium ix1 iy2 (- radius-left) 0 0 (- radius-bottom)
:start-angle pi :end-angle (* 3/2 pi)
:filled nil))
(unless (or zr zb)
(draw-ellipse* medium ix2 iy2 (- radius-right) 0 0 (- radius-bottom)
:start-angle (* 3/2 pi)
:filled nil))
(labels ((fx (y p x1a x2a x1b x2b) (draw-line* medium (if p x1a x1b) y (if p x2a x2b) y))
(fy (x p y1a y2a y1b y2b) (draw-line* medium x (if p y1a y1b) x (if p y2a y2b))))
(fx y1 zt x1 x2 ix1 ix2)
(fy x1 zl y1 y2 iy1 iy2)
(fx y2 zb x1 x2 ix1 ix2)
(fy x2 zr y1 y2 iy1 iy2)))))))))
(with-keywords-removed (args '(:radius :radius-x :radius-y
:radius-left :radius-right
:radius-top :radius-bottom))
args)))
;;; Bitmap images
;;;
;;; Based on CLIM 2.2, with an extension permitting the definition of
;;; new image formats by the user.
(defvar *bitmap-file-readers* (make-hash-table :test 'equalp)
"A hash table mapping keyword symbols naming bitmap image
formats to a function that can read an image of that format. The
functions will be called with one argument, the pathname of the
file to be read. The functions should return two values as per
`read-bitmap-file'.")
(defmacro define-bitmap-file-reader (bitmap-format (&rest args) &body body)
"Define a method for reading bitmap images of format
BITMAP-FORMAT that will be used by `read-bitmap-file' and
MAKE-PATTERN-FROM-BITMAP-FILE. BODY should return two values as
per `read-bitmap-file'."
`(setf (gethash ,bitmap-format *bitmap-file-readers*)
#'(lambda (,@args)
,@body)))
(defun bitmap-format-supported-p (format)
"Return true if FORMAT is supported by `read-bitmap-file'."
(not (null (gethash format *bitmap-file-readers*))))
(define-condition unsupported-bitmap-format (error)
((%format :reader bitmap-format
:initarg :bitmap-format
:initform (error "The bitmap format must be supplied")
:documentation "The bitmap format that cannot be loaded"))
(:report (lambda (condition stream)
(format
stream "Cannot read bitmap of unknown format \"~A\""
(bitmap-format condition))))
(:documentation "This exception is signalled when
`read-bitmap-file' is called on an bitmap of a type that no reader
has been defined for."))
(defun unsupported-bitmap-format (format)
"Signal an error of type `unsupported-bitmap-format' for the
bitmap format `format'."
(error 'unsupported-bitmap-format :bitmap-format format))
(defun read-bitmap-file (pathname &key (format :bitmap) (port (find-port)))
"Read a bitmap file named by `pathname'. `Port' specifies the
port that the bitmap is to be used on. `Format' is a keyword
symbol naming any defined bitmap file format defined by
`clim-extensions:define-bitmap-file-reader'. Two values are
returned: a two-dimensional array of pixel values and an array of
either colors or color names. If the second value is non-NIL, the
pixel values are assumed to be indexes into this
array. Otherwise, the pixel values are taken to be RGB values
encoded in 32 bit unsigned integers, with the three most
significant octets being the values R, G and B, in order."
(declare (ignore port)) ; XXX?
(funcall (or (gethash format *bitmap-file-readers*)
(unsupported-bitmap-format format))
pathname))
(defun make-pattern-from-bitmap-file (pathname &key designs
(format :bitmap) (port (find-port)))
"Read a bitmap file named by `pathname'. `Port' specifies the
port that the bitmap is to be used on. `Format' is a keyword
symbol naming any defined bitmap file format defined by
`clim-extensions:define-bitmap-file-reader'. Two values are
returned: a two-dimensional array of pixel values and an array of
either colors or color names. If the second value is non-NIL, the
pixel values are assumed to be indexes into this
array. Otherwise, the pixel values are taken to be RGB values
encoded in 32 bit unsigned integers, with the three most
significant octets being the values R, G and B, in order."
(multiple-value-bind (res read-designs)
(read-bitmap-file pathname :format format :port port)
(if read-designs
(make-pattern res (or designs read-designs))
(make-instance 'rgb-pattern :image (make-instance 'rgb-image
:width (array-dimension res 1)
:height (array-dimension res 0)
:data res)))))
(define-bitmap-file-reader :xpm (pathname)
(xpm-parse-file pathname))
(define-bitmap-file-reader :pixmap (pathname)
(read-bitmap-file pathname :format :xpm))
(define-bitmap-file-reader :pixmap-3 (pathname)
(read-bitmap-file pathname :format :xpm))
|