mdw@git.distorted.org.uk Git - clg/blob - cairo/cairo.lisp

   1 ;; Common Lisp bindings for Cairo
   2 ;; Copyright 2005 Espen S. Johnsen <espen@users.sf.net>
   3 ;;
   4 ;; Permission is hereby granted, free of charge, to any person obtaining
   5 ;; a copy of this software and associated documentation files (the
   6 ;; "Software"), to deal in the Software without restriction, including
   7 ;; without limitation the rights to use, copy, modify, merge, publish,
   8 ;; distribute, sublicense, and/or sell copies of the Software, and to
   9 ;; permit persons to whom the Software is furnished to do so, subject to
  10 ;; the following conditions:
  11 ;;
  12 ;; The above copyright notice and this permission notice shall be
  13 ;; included in all copies or substantial portions of the Software.
  14 ;;
  15 ;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16 ;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17 ;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  18 ;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  19 ;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  20 ;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  21 ;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22
  23 ;; $Id: cairo.lisp,v 1.22 2008-10-08 16:24:11 espen Exp $
  24
  25 (in-package "CAIRO")
  26
  27 (eval-when (:compile-toplevel :load-toplevel :execute)
  28   (define-enum-type surface-format :argb32 :rgb24 :a8 :a1)
  29   (define-enum-type content :color :alpha :color-alpha)
  30   (define-enum-type svg-version :svg-1.1 :svg-1.2)
  31
  32   (define-enum-type status
  33     :success :no-memory :invalid-restore :invalid-pop-group
  34     :no-current-point :invalid-matrix :invalid-status :null-pointer
  35     :invalid-string :invalid-path-data :read-error :write-error
  36     :surface-finished :surface-type-mismatch :pattern-type-mismatch
  37     :invalid-content :invalid-format :invalid-visual :file-not-found
  38     :invalid-dash)
  39
  40   (define-enum-type fill-rule :winding :even-odd)
  41   (define-enum-type line-cap :butt :round :square)
  42   (define-enum-type line-join :miter :round :bevel)
  43   (define-enum-type font-slant :normal :italic :oblique)
  44   (define-enum-type font-weight :normal :bold)
  45
  46   (define-enum-type operator
  47    :clear :source :over :in :out :atop :dest :dest-over
  48    :dest-in :dest-out :dest-atop :xor :add :saturate)
  49
  50   (define-enum-type antialias :default :none :gray :subpixel)
  51   (define-enum-type extend :none :repeat :reflect)
  52   (define-enum-type filter :fast :good :best :nearest :bilinear :gaussian)
  53   (define-enum-type subpixel-order :default :rgb :bgr :vrgb :vbgr)
  54   (define-enum-type hint-style :default :none :slight :medium :full)
  55   (define-enum-type hint-metrics :default :off :on)
  56
  57
  58   (define-enum-type surface-type
  59     image-surface pdf-surface ps-surface xlib-surface xcb-surface
  60     glitz-surface quartz-surface win32-surface beos-surface
  61     directfb-surface svg-surface os2-surface)
  62
  63   (defclass surface-class (proxy-class)
  64     ())
  65
  66   (defmethod validate-superclass ((class surface-class) (super standard-class))
  67     (subtypep (class-name super) 'surface))
  68
  69   (defclass glyph (struct)
  70     ((index
  71       :allocation :alien
  72       :initarg :index
  73       :accessor glyph-index
  74       :type unsigned-long)
  75      (x
  76       :allocation :alien
  77       :initarg :x
  78       :accessor glyph-x
  79       :type double-float)
  80      (y
  81       :allocation :alien
  82       :initarg :y
  83       :accessor glyph-y
  84       :type double-float))
  85     (:metaclass struct-class))
  86
  87   (defclass font-face (ref-counted-object)
  88     ()
  89     (:metaclass proxy-class)
  90     (:ref %font-face-reference)
  91     (:unref %font-face-destroy))
  92
  93   (defclass font-options (ref-counted-object)
  94     ((antialias
  95       :allocation :virtual
  96       :getter "font_options_get_antialias"
  97       :setter "font_options_set_antialias"
  98       :accessor font-options-antialias
  99       :type antialias)
 100      (subpixel-order
 101       :allocation :virtual
 102       :getter "font_options_get_subpixel_order"
 103       :setter "font_options_set_subpixel_order"
 104       :accessor font-options-subpixel-order
 105       :type subpixel-order)
 106      (hint-style
 107       :allocation :virtual
 108       :getter "font_options_get_hint_style"
 109       :setter "font_options_set_hint_style"
 110       :accessor font-options-hint-style
 111       :type hint-style)
 112      (hint-metrics
 113       :allocation :virtual
 114       :getter "font_options_get_hint_metrics"
 115       :setter "font_options_set_hint_metrics"
 116       :accessor font-options-hint-metrics
 117       :type hint-metrics))
 118     (:metaclass proxy-class)
 119     (:ref %font-options-reference)
 120     (:unref %font-options-destroy))
 121
 122   (defclass scaled-font (ref-counted-object)
 123     ()
 124     (:metaclass proxy-class)
 125     (:ref %scaled-font-reference)
 126     (:unref %scaled-font-destroy))
 127
 128   (defclass matrix (struct)
 129     ((xx :allocation :alien :initarg :xx :initform 1.0
 130          :accessor matrix-xx :type double-float)
 131      (yx :allocation :alien  :initarg :yx :initform 0.0
 132          :accessor matrix-yx :type double-float)
 133      (xy :allocation :alien  :initarg :xy :initform 1.0
 134          :accessor matrix-xy :type double-float)
 135      (yy :allocation :alien  :initarg :yy :initform 0.0
 136          :accessor matrix-yy :type double-float)
 137      (x0 :allocation :alien  :initarg :x0 :initform 0.0
 138          :accessor matrix-x0 :type double-float)
 139      (y0 :allocation :alien  :initarg :y0 :initform 0.0
 140          :accessor matrix-y0 :type double-float))
 141     (:metaclass struct-class))
 142
 143   (defclass font-extents (struct)
 144     ((ascent :allocation :alien :reader font-extents-ascent :type double-float)
 145      (descent :allocation :alien :reader font-extents-descent :type double-float)
 146      (height :allocation :alien :reader font-extents-height :type double-float)
 147      (max-x-advance :allocation :alien :reader font-extents-max-x-advance :type double-float)
 148      (max-y-advance :allocation :alien :reader font-extents-max-y-advance :type double-float))
 149     (:metaclass struct-class))
 150
 151   (defclass text-extents (struct)
 152     ((x-bearing :allocation :alien :reader text-extents-x-bearing :type double-float)
 153      (y-bearing :allocation :alien :reader text-extents-y-bearing :type double-float)
 154      (width :allocation :alien :reader text-extents-width :type double-float)
 155      (height :allocation :alien :reader text-extents-height :type double-float)
 156      (x-advance :allocation :alien :reader text-extents-x-advance :type double-float)
 157      (y-advance :allocation :alien :reader text-extents-y-advance :type double-float))
 158     (:metaclass struct-class))
 159
 160   (defclass pattern (ref-counted-object)
 161     ((extend
 162       :allocation :virtual
 163       :getter "cairo_pattern_get_extend"
 164       :setter "cairo_pattern_set_extend"
 165       :accessor pattern-extend
 166       :type extend)
 167      (filter
 168       :allocation :virtual
 169       :getter "cairo_pattern_get_filter"
 170       :setter "cairo_pattern_set_filter"
 171       :accessor pattern-filter
 172       :type filter)
 173      (matrix
 174       :allocation :virtual
 175       :getter "cairo_pattern_get_matrix"
 176       :setter "cairo_pattern_set_matrix"
 177       :accessor pattern-matrix
 178       :type matrix))
 179     (:metaclass proxy-class)
 180     (:ref %pattern-reference)
 181     (:unref %pattern-destroy))
 182
 183
 184   (defclass surface (ref-counted-object)
 185     ((content
 186       :allocation :virtual
 187       :getter "cairo_surface_get_content"
 188       :reader surface-content
 189       :type content))
 190     (:metaclass surface-class))
 191
 192   (defclass image-surface (surface)
 193     ((data
 194       :allocation :virtual
 195       :getter "cairo_image_surface_get_data"
 196       :reader surface-data
 197       :type pointer)
 198      (format
 199       :allocation :virtual
 200       :getter "cairo_image_surface_get_format"
 201       :reader surface-format
 202       :type surface-format)
 203      (width
 204       :allocation :virtual
 205       :getter "cairo_image_surface_get_width"
 206       :reader surface-width
 207       :type int)
 208      (height
 209       :allocation :virtual
 210       :getter "cairo_image_surface_get_height"
 211       :reader surface-height
 212       :type int)
 213      (stride
 214       :allocation :virtual
 215       :getter "cairo_image_surface_get_stride"
 216       :reader surface-stride
 217       :type int))
 218     (:metaclass surface-class))
 219
 220   (defclass xlib-surface (surface)
 221     ((width
 222       :allocation :virtual
 223       :getter "cairo_xlib_surface_get_width"
 224       :reader surface-width
 225       :type int)
 226      (height
 227       :allocation :virtual
 228       :getter "cairo_xlib_surface_get_height"
 229       :reader surface-height
 230       :type int))
 231     (:metaclass surface-class))
 232
 233   (defclass vector-surface (surface)
 234     ((width :allocation :virtual :getter surface-width)
 235      (height :allocation :virtual :setter surface-height))
 236     (:metaclass surface-class))
 237
 238   (defclass pdf-surface (vector-surface)
 239     ()
 240     (:metaclass surface-class))
 241
 242   (defclass ps-surface (vector-surface)
 243     ()
 244     (:metaclass surface-class))
 245
 246   (defclass svg-surface (vector-surface)
 247     ()
 248     (:metaclass surface-class))
 249
 250
 251   (defclass context (ref-counted-object)
 252     ((target
 253       :allocation :virtual
 254       :getter "cairo_get_target"
 255       :reader target
 256       :type surface)
 257      (source
 258       :allocation :virtual
 259       :getter "cairo_get_source"
 260       :setter "cairo_set_source"
 261       :accessor source
 262       :type pattern)
 263      (antialias
 264       :allocation :virtual
 265       :getter "cairo_get_antialias"
 266       :setter "cairo_set_antialias"
 267       :accessor antialias
 268       :type antialias)
 269      (tolerance
 270       :allocation :virtual
 271       :getter "cairo_get_tolerance"
 272       :setter "cairo_set_tolerance"
 273       :accessor tolerance
 274       :type double-float)
 275      (fill-rule
 276       :allocation :virtual
 277       :getter "cairo_get_fill_rule"
 278       :setter "cairo_set_fill_rule"
 279       :accessor fill-rule
 280       :type fill-rule)
 281      (line-width
 282       :allocation :virtual
 283       :getter "cairo_get_line_width"
 284       :setter "cairo_set_line_width"
 285       :accessor line-width
 286       :type double-float)
 287      (line-cap
 288       :allocation :virtual
 289       :getter "cairo_get_line_cap"
 290       :setter "cairo_set_line_cap"
 291       :accessor line-cap
 292       :type line-cap)
 293      (line-join
 294       :allocation :virtual
 295       :getter "cairo_get_line_join"
 296       :setter "cairo_set_line_join"
 297       :accessor line-join
 298       :type line-join)
 299      (miter-limit
 300       :allocation :virtual
 301       :getter "cairo_get_miter_limit"
 302       :setter "cairo_set_miter_limit"
 303       :accessor miter-limit
 304       :type double-float)
 305      (font-matrix
 306       :allocation :virtual
 307       :getter font-matrix
 308       :setter "cairo_set_font_matrix"
 309       :writer (setf font-matrix)
 310       :type matrix)
 311      (font-options
 312       :allocation :virtual
 313       :getter font-options
 314       :setter "cairo_set_font_options"
 315       :writer (setf font-options)
 316       :type font-options)
 317      (font-face
 318       :allocation :virtual
 319       :getter "cairo_get_font_face"
 320       :setter "cairo_set_font_face"
 321       :accessor font-face
 322       :type font-face)
 323      #?(pkg-exists-p "cairo" :atleast-version "1.4")
 324      (scaled-font
 325       :allocation :virtual
 326       :getter "cairo_get_scaled_font"
 327       :setter "cairo_set_scaled_font"
 328       :accessor scaled-font
 329       :type scaled-font)
 330      (operator
 331       :allocation :virtual
 332       :getter "cairo_get_operator"
 333       :setter "cairo_set_operator"
 334       :accessor operator
 335       :type operator)
 336      (matrix
 337       :allocation :virtual
 338       :getter matrix
 339       :setter "cairo_set_matrix"
 340       :writer (setf matrix)
 341       :type matrix)
 342      )
 343     (:metaclass proxy-class)
 344     (:ref %reference)
 345     (:unref %destroy))
 346
 347
 348    (defclass path (struct)
 349      ((status :allocation :alien :type status)
 350       (data :allocation :alien :type pointer)
 351       (length :allocation :alien :type int))
 352      (:metaclass proxy-class)
 353      (:unref %path-destroy)))
 354
 355
 356 ;;; Cairo context
 357
 358 (defmethod allocate-foreign ((context context) &key target)
 359   (%create-context target))
 360
 361 (defbinding (%create-context "cairo_create") () pointer
 362   (target surface))
 363
 364 (defbinding %reference () pointer
 365   (location pointer))
 366
 367 (defbinding %destroy () nil
 368   (location pointer))
 369
 370 (defbinding (save-context "cairo_save") () nil
 371   (cr context))
 372
 373 (defbinding (restore-context "cairo_restore") () nil
 374   (cr context))
 375
 376 (defmacro with-context ((cr &optional var) &body body)
 377   (let ((context (or var (make-symbol "CONTEXT"))))
 378     `(let ((,context ,cr))
 379        (save-context ,context)
 380        (unwind-protect
 381            (progn ,@body)
 382          (restore-context ,context)))))
 383
 384 (defbinding status () status
 385   (cr context))
 386
 387 (defun ensure-color-component (component)
 388   (etypecase component
 389     (float component)
 390     (integer (/ component 256.0))))
 391
 392 (defbinding (set-source-color "cairo_set_source_rgba") (cr red green blue &optional (alpha 1.0)) nil
 393   (cr context)
 394   ((ensure-color-component red) double-float)
 395   ((ensure-color-component green) double-float)
 396   ((ensure-color-component blue) double-float)
 397   ((ensure-color-component alpha) double-float))
 398
 399 (defbinding set-source-surface (cr surface &optional (x 0.0) (y 0.0)) nil
 400   (cr context)
 401   (surface surface)
 402   (x double-float)
 403   (y double-float))
 404
 405 (defun set-source (cr source)
 406   (etypecase source
 407     (pattern (setf (source cr) source))
 408     (surface (set-source-surface cr source))
 409     (null (set-source-color cr 0.0 0.0 0.0))
 410     (list (apply #'set-source-color cr source))
 411     (vector (apply #'set-source-color cr (coerce source 'list)))))
 412
 413 (defbinding set-dash (cr dashes &optional (offset 0.0)) nil
 414   (cr context)
 415   (dashes (vector double-float))
 416   ((length dashes) int)
 417   (offset double-float))
 418
 419 (defbinding (paint "cairo_paint_with_alpha") (cr &optional (alpha 1.0)) nil
 420   (cr context)
 421   (alpha double-float))
 422
 423 (defbinding mask () nil
 424   (cr context)
 425   (pattern pattern))
 426
 427 (defbinding mask-surface () nil
 428   (cr context)
 429   (surface surface)
 430   (surface-x double-float)
 431   (surface-y double-float))
 432
 433 (defmacro defoperator (name &optional clip-p)
 434   (let ((iname (intern (format nil "%~A" name)))
 435         (pname (intern (format nil "%~A-PRESERVE" name))))
 436     `(progn
 437        (defbinding ,iname () nil
 438          (cr context))
 439        (defbinding ,pname () nil
 440          (cr context))
 441        (defun ,name (cr &optional preserve)
 442          (if preserve
 443              (,pname cr)
 444            (,iname cr)))
 445        ,(unless clip-p
 446           (let ((tname (intern (format nil "IN-~A-P" name)))
 447                 (ename (intern (format nil "~A-EXTENTS" name))))
 448             `(progn
 449                (defbinding ,tname () boolean
 450                  (cr context)
 451                  (x double-float)
 452                  (y double-float))
 453                (defbinding ,ename () nil
 454                  (cr context)
 455                  (x1 double-float :out)
 456                  (y1 double-float :out)
 457                  (x2 double-float :out)
 458                  (y2 double-float :out))))))))
 459
 460 (defoperator clip t)
 461 (defoperator stroke)
 462 (defoperator fill)
 463
 464 (defbinding reset-clip () nil
 465   (cr context))
 466
 467 (defbinding copy-page () nil
 468   (cr context))
 469
 470 (defbinding show-page () nil
 471   (cr context))
 472
 473
 474 ;;; Paths
 475
 476 (defbinding %path-destroy () nil
 477   (location pointer))
 478
 479 (defbinding copy-path () path
 480   (cr context))
 481
 482 (defbinding copy-path-flat () path
 483   (cr context))
 484
 485 (defbinding append-path () nil
 486   (cr context)
 487   (path path))
 488
 489 (defbinding get-current-point () nil
 490   (cr context)
 491   (x double-float :out)
 492   (y double-float :out))
 493
 494 (defbinding new-path () nil
 495   (cr context))
 496
 497 #?(pkg-exists-p "cairo" :atleast-version "1.2")
 498 (defbinding new-sub-path () nil
 499   (cr context))
 500
 501 (defbinding close-path () nil
 502   (cr context))
 503
 504 (defmacro defpath (name args &optional relative-p)
 505   (flet ((def (name type)
 506            `(progn
 507               ,(when (eq type 'optimized-double-float)
 508                  `(declaim (inline ,(first name))))
 509               (defbinding ,name () nil
 510                 (cr context)
 511                 ,@(mapcar #'(lambda (arg) (list arg type)) args)))))
 512
 513   `(progn
 514      ,(def name 'double-float)
 515      ,(let ((name (intern (format nil "FAST-~A" name)))
 516             (cname (gffi::default-alien-fname name)))
 517         (def (list name cname) 'optimized-double-float))
 518      ,@(when relative-p
 519          (let* ((rel-name (intern (format nil "REL-~A" name)))
 520                 (fast-rel-name (intern (format nil "FAST-REL-~A" name)))
 521                 (cname (gffi::default-alien-fname rel-name)))
 522            (list
 523             (def rel-name 'double-float)
 524             (def (list fast-rel-name cname) 'optimized-double-float)))))))
 525
 526
 527 (defpath arc (xc yc radius angle1 angle2))
 528 (defpath arc-negative (xc yc radius angle1 angle2))
 529 (defpath curve-to (x1 y1 x2 y2 x3 y3) t)
 530 (defpath line-to (x y) t)
 531 (defpath move-to (x y) t)
 532 (defpath rectangle (x y width height))
 533
 534 (defun circle (cr x y radius &optional negative-p)
 535   (move-to cr radius 0.0d0)
 536   (if negative-p
 537       (arc-negative cr x y radius (* pi 2) 0.0d0)
 538     (arc cr x y radius 0.0d0 (* pi 2)))
 539   (close-path cr))
 540
 541
 542 (defbinding glyph-path (cr glyphs) nil
 543   (cr context)
 544   (glyphs (vector glyph))
 545   ((length glyphs) int))
 546
 547 (defbinding text-path () nil
 548   (cr context)
 549   (text string))
 550
 551
 552
 553 ;;; Patterns
 554
 555 (defbinding (pattern-add-color-stop "cairo_pattern_add_color_stop_rgba")
 556     (pattern offset red green blue &optional (alpha 1.0)) nil
 557   (pattern pattern)
 558   (offset double-float)
 559   ((ensure-color-component red) double-float)
 560   ((ensure-color-component green) double-float)
 561   ((ensure-color-component blue) double-float)
 562   ((ensure-color-component alpha) double-float))
 563
 564 (defbinding (pattern-create "cairo_pattern_create_rgba")
 565     (red green blue &optional (alpha 1.0)) pattern
 566   ((ensure-color-component red) double-float)
 567   ((ensure-color-component green) double-float)
 568   ((ensure-color-component blue) double-float)
 569   ((ensure-color-component alpha) double-float))
 570
 571 (defbinding pattern-create-for-surface () pattern
 572   (surface surface))
 573
 574 (defbinding pattern-create-linear () pattern
 575   (x0 double-float)
 576   (y0 double-float)
 577   (x1 double-float)
 578   (y1 double-float))
 579
 580 (defbinding pattern-create-radial () pattern
 581   (cx0 double-float)
 582   (cy0 double-float)
 583   (radius0 double-float)
 584   (cx1 double-float)
 585   (cy1 double-float)
 586   (radius1 double-float))
 587
 588 (defbinding %pattern-reference () pointer
 589   (location pointer))
 590
 591 (defbinding %pattern-destroy () nil
 592   (location pointer))
 593
 594 (defbinding pattern-status () status
 595   (pattern pattern))
 596
 597
 598
 599 ;;; Transformations
 600
 601 (defbinding translate () nil
 602   (cr context)
 603   (tx double-float)
 604   (ty double-float))
 605
 606 (defbinding scale (cr sx &optional (sy sx)) nil
 607   (cr context)
 608   (sx double-float)
 609   (sy double-float))
 610
 611 (defun scale-to-device (cr &optional keep-rotation-p)
 612   (if keep-rotation-p
 613       (multiple-value-bind (dx dy) (device-to-user-distance cr 1.0 0.0)
 614         (scale cr (sqrt (+ (* dx dx) (* dy dy)))))
 615     (multiple-value-bind (x y)
 616         (with-context (cr)
 617           (move-to cr 0.0 0.0)
 618           (multiple-value-call #'user-to-device cr (get-current-point cr)))
 619       (identity-matrix cr)
 620       (translate cr x y))))
 621
 622 (defbinding rotate () nil
 623   (cr context)
 624   (angle double-float))
 625
 626 (defbinding transform () nil
 627   (cr context)
 628   (matrix matrix))
 629
 630 (defbinding (matrix "cairo_get_matrix") () nil
 631   (cr context)
 632   ((make-instance 'matrix) matrix :in/return))
 633
 634 (defbinding identity-matrix () nil
 635   (cr context))
 636
 637 (defbinding user-to-device () nil
 638   (cr context)
 639   (x double-float :in/out)
 640   (y double-float :in/out))
 641
 642 (defbinding user-to-device-distance (cr dx &optional (dy dx)) nil
 643   (cr context)
 644   (dx double-float :in/out)
 645   (dy double-float :in/out))
 646
 647 (defbinding device-to-user () nil
 648   (cr context)
 649   (x double-float :in/out)
 650   (y double-float :in/out))
 651
 652 (defbinding device-to-user-distance (cr dx &optional (dy dx)) nil
 653   (cr context)
 654   (dx double-float :in/out)
 655   (dy double-float :in/out))
 656
 657
 658 ;;; Text
 659
 660 (defbinding select-font-face () nil
 661   (cr context)
 662   (family string)
 663   (slant font-slant)
 664   (weight font-weight))
 665
 666 (defbinding set-font-size () nil
 667   (cr context)
 668   (size double-float))
 669
 670 (defbinding (font-matrix "cairo_get_font_matrix") () nil
 671   (cr context)
 672   ((make-instance 'matrix) matrix :in/return))
 673
 674 (defbinding (font-options "cairo_get_font_options") () nil
 675   (cr context)
 676   ((make-instance 'font-options) font-options :in/return))
 677
 678 (defbinding show-text () nil
 679   (cr context)
 680   (text string))
 681
 682 (defbinding show-glyphs () nil
 683   (cr context)
 684   (glyphs (vector (inlined glyph)))
 685   ((length glyphs) int))
 686
 687 (defbinding font-extents (cr &optional (extents (make-instance 'font-extents))) nil
 688   (cr context)
 689   (extents font-extents :in/return))
 690
 691 (defbinding text-extents (cr text &optional (extents (make-instance 'text-extents))) nil
 692   (cr context)
 693   (text string)
 694   (extents text-extents :in/return))
 695
 696 (defbinding glyph-extents (cr glyphs &optional (extents (make-instance 'text-extents))) nil
 697   (cr context)
 698   (glyphs (vector glyph))
 699   ((length glyphs) int)
 700   (extents text-extents :in/return))
 701
 702
 703 ;;; Fonts
 704
 705 (defbinding %font-face-reference () pointer
 706   (location pointer))
 707
 708 (defbinding %font-face-destroy () nil
 709   (location pointer))
 710
 711 (defbinding font-face-status () status
 712   (font-face font-face))
 713
 714
 715
 716 ;;; Scaled Fonts
 717
 718 (defbinding %scaled-font-reference () pointer
 719   (location pointer))
 720
 721 (defbinding %scaled-font-destroy () nil
 722   (location pointer))
 723
 724 (defbinding scaled-font-status () status
 725   (scaled-font scaled-font))
 726
 727 (defbinding scaled-font-extents (scaled-font &optional (extents (make-instance 'text-extents))) nil
 728   (scaled-font scaled-font)
 729   (extents text-extents :in/return))
 730
 731 (defbinding scaled-font-glyph-extents (scaled-font glyphs &optional (extents (make-instance 'text-extents))) nil
 732   (scaled-font scaled-font)
 733   (glyphs (vector glyph))
 734   ((length glyphs) int)
 735   (extents text-extents :in/return))
 736
 737 (defbinding %scaled-font-create () pointer
 738   (font-face font-face)
 739   (font-matrix matrix)
 740   (ctm matrix)
 741   (options font-options))
 742
 743 (defmethod allocate-foreign ((scaled-font scaled-font) &key font-face font-matrix cmt options)
 744   (%scaled-font-create font-face font-matrix cmt options))
 745
 746
 747
 748 ;;; Font Options
 749
 750
 751 (defbinding %font-options-copy () nil
 752   (location pointer))
 753
 754 (defbinding %font-options-destroy () nil
 755   (location pointer))
 756
 757 (defbinding font-options-status () status
 758   (font-options font-options))
 759
 760 (defbinding %font-options-create () pointer)
 761
 762 (defmethod allocate-foreign ((font-options font-options) &rest initargs)
 763   (declare (ignore initargs))
 764   (%font-options-create))
 765
 766 (defbinding font-options-merge () nil
 767   (options1 font-options :in/return)
 768   (options2 font-options))
 769
 770 (defbinding font-options-hash () unsigned-int
 771   (options font-options))
 772
 773 (defbinding font-options-equal-p () boolean
 774   (options1 font-options)
 775   (options2 font-options))
 776
 777
 778
 779 ;;; Surfaces
 780
 781 (defmethod make-proxy-instance :around ((class surface-class) location
 782                                         &rest initargs)
 783   (let ((class (find-class (%surface-get-type location))))
 784     (apply #'call-next-method class location initargs)))
 785
 786 (defbinding %surface-get-type () surface-type
 787   (location pointer))
 788
 789 (defbinding %surface-reference () pointer
 790   (location pointer))
 791
 792 (defbinding %surface-destroy () nil
 793   (location pointer))
 794
 795 (defmethod reference-function ((class surface-class))
 796   (declare (ignore class))
 797   #'%surface-reference)
 798
 799 (defmethod unreference-function ((class surface-class))
 800   (declare (ignore class))
 801   #'%surface-destroy)
 802
 803 (defbinding %surface-set-user-data (surface key data-id) status
 804   (surface pointer)
 805   ((quark-intern key) pointer-data)
 806   (data-id pointer-data)
 807   (user-data-destroy-callback callback))
 808
 809 (defmethod (setf user-data) (data (surface surface) key)
 810   (%surface-set-user-data (foreign-location surface) key (register-user-data data))
 811   data)
 812
 813 (defbinding %surface-get-user-data () pointer-data
 814   (surface surface)
 815   (key pointer-data))
 816
 817 (defmethod user-data ((surface surface) key)
 818   (find-user-data (%surface-get-user-data surface (quark-intern key))))
 819
 820 (defbinding surface-create-similar () surface
 821   (other surface)
 822   (format surface-format )
 823   (width int)
 824   (height int))
 825
 826 (defbinding surface-finish () nil
 827   (surface surface))
 828
 829 (defbinding surface-flush () nil
 830   (surface surface))
 831
 832 (defbinding surface-get-font-options () nil
 833   (surface surface)
 834   ((make-instance 'font-options) font-options :in/return))
 835
 836 (defbinding surface-set-device-offset () nil
 837   (surface surface)
 838   (x-offset double-float)
 839   (y-offset double-float))
 840
 841 (defbinding surface-status () status
 842   (surface surface))
 843
 844 (defbinding %surface-mark-dirty () nil
 845   (surface surface))
 846
 847 (defbinding %surface-mark-dirty-rectangle () nil
 848   (surface surface)
 849   (x int)
 850   (y int)
 851   (width int)
 852   (height int))
 853
 854 (defun surface-mark-dirty (surface &optional x y width height)
 855   (if x
 856       (%surface-mark-dirty-rectangle surface x y width height)
 857     (%surface-mark-dirty surface)))
 858
 859 (defbinding surface-set-fallback-resolution () nil
 860   (surface surface)
 861   (x-pixels-per-inch double-float)
 862   (y-pixels-per-inch double-float))
 863
 864 (define-callback stream-write-func status
 865     ((stream-id pointer-data) (data pointer) (length unsigned-int))
 866   (let ((stream (find-user-data stream-id)))
 867     (typecase stream
 868       (stream
 869        (map-c-vector 'nil #'(lambda (octet) (write-byte octet stream))
 870         data '(unsigned-byte 8) length))
 871       ((or symbol function)
 872        (funcall stream
 873         (map-c-vector 'vector #'identity data '(unsigned-byte 8) length)))))
 874   :success)
 875
 876 (define-callback stream-read-func status
 877     ((stream-id pointer-data) (data pointer) (length unsigned-int))
 878   (let ((stream (find-user-data stream-id)))
 879     (typecase stream
 880       (stream
 881        (loop for i below length do
 882         (let ((byte (read-byte stream nil)))
 883           (if byte
 884               (setf (gffi::ref-uint-8 data i) byte)
 885             (return-from stream-read-func :read-error)))))
 886       ((or symbol function) (funcall stream data length))))
 887   :success)
 888
 889
 890 (defmacro with-surface ((surface cr) &body body)
 891   `(let ((,cr (make-instance 'context :target ,surface)))
 892      ,@body))
 893
 894
 895 ;; Image Surface
 896
 897 ;; Should data be automatically freed when the surface is GCed?
 898 (defmethod allocate-foreign ((surface image-surface) &key stream filename
 899                              width height stride format data)
 900   (cond
 901    (stream
 902     (let ((stream-id (register-user-data stream)))
 903       (unwind-protect
 904            (%image-surface-create-from-png-stream stream-id)
 905         (destroy-user-data stream-id))))
 906    (filename (%image-surface-create-from-png filename))
 907    ((not data) (%image-surface-create format width height))
 908    (t
 909     (%image-surface-create-for-data data format width height
 910      (or
 911       stride
 912       (let ((element-size (cdr (assoc format '((:argb32 . 4) (:rgb24 . 4) (:a8 . 1) (:a1 1/8))))))
 913         (ceiling (* width element-size))))))))
 914
 915
 916 (defbinding %image-surface-create () pointer
 917   (format surface-format)
 918   (width int)
 919   (hegit int))
 920
 921 (defbinding %image-surface-create-for-data () pointer
 922   (data pointer)
 923   (format surface-format)
 924   (width int)
 925   (hegit int)
 926   (stride int))
 927
 928 (defbinding %image-surface-create-from-png () pointer
 929   (filename pathname))
 930
 931 (defbinding %image-surface-create-from-png-stream (stream) pointer
 932   (stream-read-func callback)
 933   (stream pointer-data))
 934
 935 (defbinding surface-write-to-png () status
 936   (surface surface)
 937   (filename pathname))
 938
 939
 940 (defbinding %surface-write-to-png-stream (surface stream) status
 941   (surface surface)
 942   (stream-write-func callback)
 943   (stream pointer-data))
 944
 945 (defun surface-write-to-png-stream (surface stream)
 946   (let ((stream-id (register-user-data stream)))
 947     (unwind-protect
 948          (%surface-write-to-png-stream surface stream-id)
 949       (destroy-user-data stream-id))))
 950
 951
 952 ;;; Virtual size surface (abstract class)
 953
 954 (defmethod initialize-instance :after ((surface vector-surface) &key
 955                                        width height)
 956   (setf (user-data surface 'width) width)
 957   (setf (user-data surface 'height) height))
 958
 959 (defmethod surface-width ((surface vector-surface))
 960   (user-data surface 'width))
 961
 962 (defmethod surface-height ((surface vector-surface))
 963   (user-data surface 'height))
 964
 965
 966 (defun allocate-vector-surface (surface-create surface-create-for-stream
 967                                 &key output filename stream width height)
 968   (let ((location
 969          (cond
 970            ((/= (count-if #'identity (list output filename stream)) 1)
 971             (error "One and only one of the arguments :OUTPUT, :FILENAME and :STREAM shoud be specified"))
 972            (filename (funcall surface-create filename width height))
 973            ((typep output '(or string pathname))
 974             (%svg-surface-create output width height))
 975            (t
 976             (let* ((stream-id (register-user-data (or stream output)))
 977                    (location (funcall surface-create-for-stream
 978                               stream-id width height)))
 979               (%surface-set-user-data location 'stream stream-id)
 980               location)))))
 981     location))
 982
 983
 984 ;;; PDF Surface
 985
 986 (defmethod allocate-foreign ((surface pdf-surface) &rest args)
 987   (apply #'allocate-vector-surface
 988    #'%pdf-surface-create #'%pdf-surface-create-for-stream args))
 989
 990 (defbinding %pdf-surface-create () pointer
 991   (filename pathname)
 992   (width double-float)
 993   (height double-float))
 994
 995 (defbinding %pdf-surface-create-for-stream (stream width height) pointer
 996   (stream-write-func callback)
 997   (stream pointer-data)
 998   (width double-float)
 999   (height double-float))
1000
1001 (defbinding pdf-surface-set-size () nil
1002   (surface pdf-surface)
1003   (width double-float)
1004   (height double-float))
1005
1006
1007 ;;; PS Surface
1008
1009 (defmethod allocate-foreign ((surface ps-surface) &rest args)
1010   (apply #'allocate-vector-surface
1011    #'%ps-surface-create #'%ps-surface-create-for-stream args))
1012
1013 (defbinding %ps-surface-create () pointer
1014   (filename pathname)
1015   (width double-float)
1016   (height double-float))
1017
1018 (defbinding %ps-surface-create-for-stream (stream width height) pointer
1019   (stream-write-func callback)
1020   (stream pointer-data)
1021   (width double-float)
1022   (height double-float))
1023
1024 (defbinding ps-surface-set-size () nil
1025   (surface ps-surface)
1026   (width double-float)
1027   (height double-float))
1028
1029 (defbinding ps-surface-dsc-begin-setup () nil
1030   (surface ps-surface))
1031
1032 (defbinding ps-surface-dsc-begin-page-setup () nil
1033   (surface ps-surface))
1034
1035 (defbinding ps-surface-dsc-comment () nil
1036   (surface ps-surface)
1037   (comment string))
1038
1039
1040 ;;; SVG Surface
1041
1042 (defmethod allocate-foreign ((surface svg-surface) &rest args)
1043   (apply #'allocate-vector-surface
1044    #'%svg-surface-create #'%svg-surface-create-for-stream args))
1045
1046 (defbinding %svg-surface-create () pointer
1047   (filename pathname)
1048   (width double-float)
1049   (height double-float))
1050
1051 (defbinding %svg-surface-create-for-stream (stream width height) pointer
1052   (stream-write-func callback)
1053   (stream pointer-data)
1054   (width double-float)
1055   (height double-float))
1056
1057 (defbinding svg-surface-restrict-to-version () nil
1058   (surface svg-surface)
1059   (version svg-version))
1060
1061
1062
1063 ;;; Matrices
1064
1065 (defbinding matrix-init (xx yx xy yy x0 y0 &optional (matrix (make-instance 'matrix))) nil
1066   (matrix matrix :in/return)
1067   (xx double-float) (yx double-float)
1068   (xy double-float) (yy double-float)
1069   (x0 double-float) (y0 double-float))
1070
1071 (defbinding matrix-init-identity (&optional (matrix (make-instance 'matrix))) nil
1072   (matrix matrix :in/return))
1073
1074 (defun identity-matrix-p (matrix)
1075   (with-slots (xx yx xy yy x0 y0) matrix
1076     (and
1077      (= xx 1.0d0) (= yx 0.0d0) (= xy 0.0d0)
1078      (= yy 1.0d0) (= x0 0.0d0) (= y0 0.0d0))))
1079
1080 (defbinding matrix-init-translate (tx ty &optional (matrix (make-instance 'matrix))) nil
1081   (matrix matrix :in/return)
1082   (tx double-float)
1083   (ty double-float))
1084
1085 (defbinding matrix-init-scale (sx &optional (sy sx) (matrix (make-instance 'matrix))) nil
1086   (matrix matrix :in/return)
1087   (sx double-float)
1088   (sy double-float))
1089
1090 (defbinding matrix-init-rotate (rotation &optional (matrix (make-instance 'matrix))) nil
1091   (matrix matrix :in/return)
1092   (rotation double-float))
1093
1094 (defbinding matrix-translate () nil
1095   (matrix matrix :in/return)
1096   (tx double-float)
1097   (ty double-float))
1098
1099 (defbinding matrix-scale (matrix sx &optional (sy sx)) nil
1100   (matrix matrix :in/return)
1101   (sx double-float)
1102   (sy double-float))
1103
1104 (defbinding matrix-rotate () nil
1105   (matrix matrix :in/return)
1106   (rotation double-float))
1107
1108 (defbinding matrix-invert () nil
1109   (matrix matrix :in/return))
1110
1111 (defbinding matrix-multiply () nil
1112   (result matrix :out)
1113   (a matrix)
1114   (b matrix))
1115
1116 (defbinding matrix-transform-distance (matrix dx &optional (dy dx)) nil
1117   (matrix matrix)
1118   (dx double-float :in/out)
1119   (dy double-float :in/out))
1120
1121 (defbinding matrix-transform-point () nil
1122   (matrix matrix)
1123   (x double-float :in/out)
1124   (y double-float :in/out))
1125
1126
1127 ;; Version information
1128
1129 (defbinding %version () int)
1130
1131 (defun version ()
1132   (let ((version (%version)))
1133     (values
1134      (mod (truncate version 10000) 100)
1135      (mod (truncate version 100) 100)
1136      (mod version 100))))
1137
1138 (defbinding version-string () (static string))