;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-;; $Id: cairo.lisp,v 1.15 2007/09/07 07:13:55 espen Exp $
+;; $Id: cairo.lisp,v 1.25 2009/02/09 11:45:03 espen Exp $
(in-package "CAIRO")
:accessor matrix-y0 :type double-float))
(:metaclass struct-class))
+ (defclass font-extents (struct)
+ ((ascent :allocation :alien :reader font-extents-ascent :type double-float)
+ (descent :allocation :alien :reader font-extents-descent :type double-float)
+ (height :allocation :alien :reader font-extents-height :type double-float)
+ (max-x-advance :allocation :alien :reader font-extents-max-x-advance :type double-float)
+ (max-y-advance :allocation :alien :reader font-extents-max-y-advance :type double-float))
+ (:metaclass struct-class))
(defclass text-extents (struct)
((x-bearing :allocation :alien :reader text-extents-x-bearing :type double-float)
(stride
:allocation :virtual
:getter "cairo_image_surface_get_stride"
- :reader surface-height
+ :reader surface-stride
:type int))
(:metaclass surface-class))
:type int))
(:metaclass surface-class))
- (defclass pdf-surface (surface)
+ (defclass vector-surface (surface)
+ ((width :allocation :virtual :getter surface-width)
+ (height :allocation :virtual :setter surface-height))
+ (:metaclass surface-class))
+
+ (defclass pdf-surface (vector-surface)
()
(:metaclass surface-class))
- (defclass ps-surface (surface)
+ (defclass ps-surface (vector-surface)
()
(:metaclass surface-class))
- (defclass svg-surface (surface)
+ (defclass svg-surface (vector-surface)
()
(:metaclass surface-class))
:type double-float)
(font-matrix
:allocation :virtual
- :getter "cairo_get_font_matrix"
+ :getter font-matrix
:setter "cairo_set_font_matrix"
- :accessor font-matrix
+ :writer (setf font-matrix)
:type matrix)
(font-options
:allocation :virtual
- :getter "cairo_get_font_options"
+ :getter font-options
:setter "cairo_set_font_options"
- :accessor font-options
+ :writer (setf font-options)
:type font-options)
(font-face
:allocation :virtual
:setter "cairo_set_font_face"
:accessor font-face
:type font-face)
+ #?(pkg-exists-p "cairo" :atleast-version "1.4")
+ (scaled-font
+ :allocation :virtual
+ :getter "cairo_get_scaled_font"
+ :setter "cairo_set_scaled_font"
+ :accessor scaled-font
+ :type scaled-font)
(operator
:allocation :virtual
:getter "cairo_get_operator"
(:unref %destroy))
-;; (defclass path (proxy)
-;; ()
-;; (:metaclass proxy-class))
+ (defclass path (struct)
+ ((status :allocation :alien :type status)
+ (data :allocation :alien :type pointer)
+ (length :allocation :alien :type int))
+ (:metaclass proxy-class)
+ (:unref %path-destroy))
+
+ (defclass jpeg-parameter (struct)
+ ((quality
+ :allocation :alien
+ :initarg :quality
+ :initform 75
+ :type int)
+ (interlace
+ :allocation :alien
+ :initarg :interlace
+ :initform t
+ :type boolean))
+ (:metaclass struct-class)))
+
+
+(define-condition cairo-error (error)
+ ((status :initarg :status :reader cairo-status))
+ (:report (lambda (condition stream)
+ (format stream "Cairo function returned with status code: ~A"
+ (cairo-status condition)))))
+
+(deftype status-signal () 'status)
+
+(define-type-method from-alien-form ((type status-signal) status &key ref)
+ (declare (ignore type ref))
+ `(let ((status ,(from-alien-form 'status status)))
+ (unless (eq status :success)
+ (error 'cairo-error :status status))
+ status))
- )
;;; Cairo context
;;; Paths
+(defbinding %path-destroy () nil
+ (location pointer))
+
+(defbinding copy-path () path
+ (cr context))
+
+(defbinding copy-path-flat () path
+ (cr context))
+
+(defbinding append-path () nil
+ (cr context)
+ (path path))
+
(defbinding get-current-point () nil
(cr context)
(x double-float :out)
(defun scale-to-device (cr &optional keep-rotation-p)
(if keep-rotation-p
- (multiple-value-call #'scale cr (device-to-user-distance cr 1.0))
+ (multiple-value-bind (dx dy) (device-to-user-distance cr 1.0 0.0)
+ (scale cr (sqrt (+ (* dx dx) (* dy dy)))))
(multiple-value-bind (x y)
(with-context (cr)
(move-to cr 0.0 0.0)
(cr context)
(size double-float))
+(defbinding (font-matrix "cairo_get_font_matrix") () nil
+ (cr context)
+ ((make-instance 'matrix) matrix :in/return))
+
+(defbinding (font-options "cairo_get_font_options") () nil
+ (cr context)
+ ((make-instance 'font-options) font-options :in/return))
+
(defbinding show-text () nil
(cr context)
(text string))
(defbinding show-glyphs () nil
(cr context)
- (glyphs (vector glyph))
+ (glyphs (vector (inlined glyph)))
((length glyphs) int))
-(defbinding font-extents () boolean
- (cr context))
+(defbinding font-extents (cr &optional (extents (make-instance 'font-extents))) nil
+ (cr context)
+ (extents font-extents :in/return))
(defbinding text-extents (cr text &optional (extents (make-instance 'text-extents))) nil
(cr context)
;;; Surfaces
+(defgeneric user-data (surface key))
+(defgeneric (setf user-data) (value surface key))
+
(defmethod make-proxy-instance :around ((class surface-class) location
&rest initargs)
(let ((class (find-class (%surface-get-type location))))
(defbinding %surface-destroy () nil
(location pointer))
+(defbinding %surface-status () status
+ pointer)
+
+(defmethod allocate-foreign :around ((surface surface) &key)
+ (let ((location (call-next-method)))
+ (cond
+ ((not (eq (%surface-status location) :success))
+ (%surface-destroy location)
+ (error 'cairo-error :status (%surface-status location)))
+ (t location))))
+
(defmethod reference-function ((class surface-class))
(declare (ignore class))
#'%surface-reference)
(declare (ignore class))
#'%surface-destroy)
-(defbinding %surface-set-user-data (surface key data-id) status
+(defbinding %surface-set-user-data (surface key data-id) status-signal
(surface pointer)
((quark-intern key) pointer-data)
(data-id pointer-data)
(x-pixels-per-inch double-float)
(y-pixels-per-inch double-float))
+(defun %stream-write-func (stream-id data length)
+ (let ((stream (find-user-data stream-id))
+ (sequence
+ (map-c-vector 'vector #'identity data '(unsigned-byte 8) length)))
+ (handler-case (etypecase stream
+ (stream
+ (write-sequence sequence stream)
+ length)
+ ((or symbol function)
+ (funcall stream sequence)))
+ (serious-condition (condition)
+ (declare (ignore condition))
+ 0))))
+
(define-callback stream-write-func status
((stream-id pointer-data) (data pointer) (length unsigned-int))
- (let ((stream (find-user-data stream-id)))
- (typecase stream
- (stream
- (map-c-vector 'nil #'(lambda (octet) (write-byte octet stream))
- data '(unsigned-byte 8) length))
- ((or symbol function)
- (funcall stream
- (map-c-vector 'vector #'identity data '(unsigned-byte 8) length)))))
- :success)
+ (if (= (%stream-write-func stream-id data length) length)
+ :success
+ :write-error))
+
+(defun %stream-read-func (stream-id data length)
+ (let* ((stream (find-user-data stream-id)))
+ (handler-case
+ (multiple-value-bind (sequence bytes-read)
+ (etypecase stream
+ (stream
+ (let ((sequence (make-array length
+ :element-type '(unsigned-byte 8))))
+ (values sequence (read-sequence sequence stream))))
+ ((or symbol function) (funcall stream length)))
+ (make-c-vector '(unsigned-byte 8) (or bytes-read (length sequence))
+ :content sequence :location data)
+ (or bytes-read (length sequence)))
+ (serious-condition (condition)
+ (declare (ignore condition))
+ 0))))
+
+(define-callback stream-read-func status
+ ((stream-id pointer-data) (data pointer) (length unsigned-int))
+ (if (= (%stream-read-func stream-id data length) length)
+ :success
+ :read-error))
+
+(defmacro with-surface ((surface cr) &body body)
+ `(let ((,cr (make-instance 'context :target ,surface)))
+ ,@body))
;; Image Surface
-;; Should data be automatically freed when the surface is GCed?
-(defmethod allocate-foreign ((surface image-surface)
- &key filename width height stride format data)
- (cond
- (filename (%image-surface-create-from-png filename))
- ((not data) (%image-surface-create format width height))
- (t
- (%image-surface-create-for-data data format width height
- (or
- stride
- (let ((element-size (cdr (assoc format '((:argb32 . 4) (:rgb24 . 4) (:a8 . 1) (:a1 1/8))))))
- (ceiling (* width element-size))))))))
+(defmethod allocate-foreign ((surface image-surface) &key source type
+ width height stride format)
+ (etypecase source
+ (null (%image-surface-create format width height))
+ ((or stream function symbol)
+ (let ((stream-id (register-user-data source)))
+ (unwind-protect
+ (cond
+ ((member type '("png" "image/png") :test #'equal)
+ (%image-surface-create-from-png-stream stream-id))
+ ((member type '("jpeg" "image/jpeg") :test #'equal)
+ (%image-surface-create-from-jpeg-stream stream-id))
+ ((not type) (error "Image type must be specified"))
+ ((error "Can't handle image type ~A" type)))
+ (destroy-user-data stream-id))))
+ ((or string pathname)
+ (cond
+ ((member type '("png" "image/png") :test #'equal)
+ (%image-surface-create-from-png source))
+ ((member type '("jpeg" "image/jpeg") :test #'equal)
+ (%image-surface-create-from-jpeg source))
+ ((not type) (error "Image type must be specified"))
+ ((error "Can't handle image type ~A" type))))
+ (pointer
+ (%image-surface-create-for-data source format width height
+ (or stride (format-stride-for-width format width))))))
+
+#?(pkg-exists-p "cairo" :atleast-version "1.6")
+(defbinding format-stride-for-width () int
+ surface-format (width int))
+
+#?-(pkg-exists-p "cairo" :atleast-version "1.6")
+(defun format-stride-for-width (format width)
+ (let ((element-size (cdr (assoc format '((:argb32 . 4) (:rgb24 . 4) (:a8 . 1) (:a1 1/8))))))
+ (ceiling (* width element-size))))
(defbinding %image-surface-create () pointer
(defbinding %image-surface-create-from-png () pointer
(filename pathname))
-(defbinding surface-write-to-png () status
+(defbinding %image-surface-create-from-png-stream (stream) pointer
+ (stream-read-func callback)
+ (stream pointer-data))
+
+(defbinding %surface-write-to-png () status-signal
(surface surface)
(filename pathname))
+(defbinding %surface-write-to-png-stream (surface stream) status-signal
+ (surface surface)
+ (stream-write-func callback)
+ (stream pointer-data))
-;;; PDF Surface
+(defgeneric surface-write-to-png (surface dest))
+
+(defmethod surface-write-to-png (surface filename)
+ (%surface-write-to-png surface filename))
+
+(defmethod surface-write-to-png (surface (stream stream))
+ (let ((stream-id (register-user-data stream)))
+ (unwind-protect
+ (%surface-write-to-png-stream surface stream-id)
+ (destroy-user-data stream-id))))
+
+
+;;; JPEG support
-(defmethod allocate-foreign ((surface pdf-surface)
- &key filename stream width height)
- (cond
- ((and filename stream)
- (error "Only one of the arguments :filename and :stream may be specified"))
- (filename (%pdf-surface-create filename width height))
- (stream
- (let* ((stream-id (register-user-data stream))
- (location (%pdf-surface-create-for-stream stream-id width height)))
- (%surface-set-user-data location 'stream stream-id)
- location))))
+(define-callback jpeg-stream-write-func unsigned
+ ((stream-id pointer-data) (data pointer) (length unsigned-int))
+ (%stream-write-func stream-id data length))
+(define-callback jpeg-stream-read-func unsigned
+ ((stream-id pointer-data) (data pointer) (length unsigned-int))
+ (%stream-read-func stream-id data length))
+
+(defbinding %image-surface-create-from-jpeg () pointer
+ (filename pathname)
+ (status status-signal :out))
+
+(defbinding %image-surface-create-from-jpeg-stream (stream) pointer
+ (jpeg-stream-read-func callback)
+ (stream pointer-data)
+ (status status-signal :out))
+
+(defgeneric surface-write-to-jpeg (surface dest &key quality interlace))
+
+(defun %surface-acquire-image (surface)
+ (typecase surface
+ (image-surface surface)
+ ((let ((image (make-instance 'image-surface
+ :width (surface-width surface)
+ :height (surface-height surface)
+ :format :argb32)))
+ (with-surface (image cr)
+ (set-source-surface cr surface)
+ (setf (operator cr) :source)
+ (paint cr))
+ image))))
+
+(defbinding %surface-write-to-jpeg () status-signal
+ (surface image-surface)
+ (filename pathname)
+ (param jpeg-parameter))
+
+(defmethod surface-write-to-jpeg (surface filename &key
+ (quality 75) (interlace t))
+ (let ((param (make-instance 'jpeg-parameter
+ :quality quality :interlace interlace)))
+ (%surface-write-to-jpeg (%surface-acquire-image surface) filename param)))
+
+(defbinding %surface-write-to-jpeg-stream (surface stream param) status-signal
+ (surface surface)
+ (jpeg-stream-write-func callback)
+ (stream pointer-data)
+ (param jpeg-parameter))
+
+(defmethod surface-write-to-jpeg (surface (stream stream) &key
+ (quality 75) (interlace t))
+ (let ((stream-id (register-user-data stream))
+ (param (make-instance 'jpeg-parameter
+ :quality quality :interlace interlace)))
+ (unwind-protect
+ (%surface-write-to-jpeg-stream (%surface-acquire-image surface) stream-id param)
+ (destroy-user-data stream-id))))
+
+
+;;; Virtual size surface (abstract class)
+
+(defmethod initialize-instance :after ((surface vector-surface) &key
+ width height)
+ (setf (user-data surface 'width) width)
+ (setf (user-data surface 'height) height))
+
+(defmethod surface-width ((surface vector-surface))
+ (user-data surface 'width))
+
+(defmethod surface-height ((surface vector-surface))
+ (user-data surface 'height))
+
+
+(defun allocate-vector-surface (surface-create surface-create-for-stream
+ &key output filename stream width height)
+ (let ((location
+ (cond
+ ((/= (count-if #'identity (list output filename stream)) 1)
+ (error "One and only one of the arguments :OUTPUT, :FILENAME and :STREAM shoud be specified"))
+ (filename (funcall surface-create filename width height))
+ ((typep output '(or string pathname))
+ (%svg-surface-create output width height))
+ (t
+ (let* ((stream-id (register-user-data (or stream output)))
+ (location (funcall surface-create-for-stream
+ stream-id width height)))
+ (%surface-set-user-data location 'stream stream-id)
+ location)))))
+ location))
+
+
+;;; PDF Surface
+
+(defmethod allocate-foreign ((surface pdf-surface) &rest args)
+ (apply #'allocate-vector-surface
+ #'%pdf-surface-create #'%pdf-surface-create-for-stream args))
(defbinding %pdf-surface-create () pointer
(filename pathname)
;;; PS Surface
-(defmethod allocate-foreign ((surface ps-surface)
- &key filename stream width height)
- (cond
- ((and filename stream)
- (error "Only one of the arguments :filename and :stream may be specified"))
- (filename (%ps-surface-create filename width height))
- (stream
- (let* ((stream-id (register-user-data stream))
- (location (%ps-surface-create-for-stream stream-id width height)))
- (%surface-set-user-data location 'stream stream-id)
- location))))
+(defmethod allocate-foreign ((surface ps-surface) &rest args)
+ (apply #'allocate-vector-surface
+ #'%ps-surface-create #'%ps-surface-create-for-stream args))
(defbinding %ps-surface-create () pointer
(filename pathname)
;;; SVG Surface
-(defmethod allocate-foreign ((surface svg-surface)
- &key filename stream width height)
- (cond
- ((and filename stream)
- (error "Only one of the arguments :filename and :stream may be specified"))
- (filename (%svg-surface-create filename width height))
- (stream
- (let* ((stream-id (register-user-data stream))
- (location (%svg-surface-create-for-stream stream-id width height)))
- (%surface-set-user-data location 'stream stream-id)
- location))))
+(defmethod allocate-foreign ((surface svg-surface) &rest args)
+ (apply #'allocate-vector-surface
+ #'%svg-surface-create #'%svg-surface-create-for-stream args))
(defbinding %svg-surface-create () pointer
(filename pathname)
;;; Matrices
-(defbinding matrix-init () nil
+(defbinding matrix-init (xx yx xy yy x0 y0 &optional (matrix (make-instance 'matrix))) nil
(matrix matrix :in/return)
(xx double-float) (yx double-float)
(xy double-float) (yy double-float)
(defbinding matrix-init-identity (&optional (matrix (make-instance 'matrix))) nil
(matrix matrix :in/return))
-(defbinding matrix-init-translate () nil
+(defun identity-matrix-p (matrix)
+ (with-slots (xx yx xy yy x0 y0) matrix
+ (and
+ (= xx 1.0d0) (= yx 0.0d0) (= xy 0.0d0)
+ (= yy 1.0d0) (= x0 0.0d0) (= y0 0.0d0))))
+
+(defbinding matrix-init-translate (tx ty &optional (matrix (make-instance 'matrix))) nil
(matrix matrix :in/return)
(tx double-float)
(ty double-float))
-(defbinding matrix-init-scale () nil
+(defbinding matrix-init-scale (sx &optional (sy sx) (matrix (make-instance 'matrix))) nil
(matrix matrix :in/return)
(sx double-float)
(sy double-float))
-(defbinding matrix-init-rotate () nil
+(defbinding matrix-init-rotate (rotation &optional (matrix (make-instance 'matrix))) nil
(matrix matrix :in/return)
- (radians double-float))
+ (rotation double-float))
(defbinding matrix-translate () nil
(matrix matrix :in/return)
(tx double-float)
(ty double-float))
-(defbinding matrix-scale () nil
+(defbinding matrix-scale (matrix sx &optional (sy sx)) nil
(matrix matrix :in/return)
(sx double-float)
(sy double-float))
(defbinding matrix-rotate () nil
(matrix matrix :in/return)
- (radians double-float))
+ (rotation double-float))
(defbinding matrix-invert () nil
(matrix matrix :in/return))
(a matrix)
(b matrix))
-(defbinding matrix-transform-distance () nil
- (matrix matrix :in/return)
- (dx double-float)
- (dy double-float))
+(defbinding matrix-transform-distance (matrix dx &optional (dy dx)) nil
+ (matrix matrix)
+ (dx double-float :in/out)
+ (dy double-float :in/out))
(defbinding matrix-transform-point () nil
- (matrix matrix :in/return)
- (x double-float)
- (y double-float))
+ (matrix matrix)
+ (x double-float :in/out)
+ (y double-float :in/out))
+
+
+;; Version information
+(defbinding %version () int)
+(defun version ()
+ (let ((version (%version)))
+ (values
+ (mod (truncate version 10000) 100)
+ (mod (truncate version 100) 100)
+ (mod version 100))))
+(defbinding version-string () (static string))
~mdw / clg / blobdiff