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context.lisp
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context.lisp
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(in-package #:org.shirakumo.fraf.trial)
(defvar *context* NIL)
(defmacro with-context ((&optional (context '*context*) &key force reentrant) &body body)
(let* ((cont (gensym "CONTEXT"))
(thunk (gensym "THUNK"))
(acquiring-body `(progn
(acquire-context ,cont :force ,force)
(unwind-protect
(,thunk)
(release-context ,cont :reentrant ,reentrant)))))
`(let ((,cont ,context))
(flet ((,thunk ()
,@body))
,(if reentrant
acquiring-body
`(if (current-p ,cont)
(,thunk)
(let ((*context* ,cont))
,acquiring-body)))))))
(defun launch-with-context (&optional main &rest initargs)
(declare (ignore handler initargs))
(error "No context implementation is present.~%~
Please load a Trial backend."))
(defun make-context (&optional handler &rest initargs)
(declare (ignore handler initargs))
(error "No context implementation is present.~%~
Please load a Trial backend."))
(defclass monitor ()
())
(defclass context ()
((current-thread :initform NIL :accessor current-thread)
(waiting :initform 0 :accessor context-waiting)
(lock :initform (bt:make-lock "Context lock") :reader context-lock)
(wait-lock :initform (bt:make-lock "Context wait lock") :reader context-wait-lock)
(handler :initarg :handler :accessor handler)
(shared-with :initarg :share-with :reader shared-with)
(glsl-target-version :initarg :glsl-version :initform NIL :accessor glsl-target-version)
(binding-point-allocator :initform (make-array 256 :element-type 'bit) :accessor binding-point-allocator))
(:default-initargs
:title "Trial"
:width 1280
:height 720
:glsl-version NIL
:version '(3 3)
:profile :core
:double-buffering T
:stereo-buffer NIL
:vsync :off
:share-with NIL
:handler NIL))
(defmethod print-object ((context context) stream)
(print-unreadable-object (context stream :type T :identity T)))
(defmethod reinitialize-instance :after ((context context) &key)
(with-context (context)
(destroy-context context)
(create-context context)))
(defmethod initialize-instance :after ((context context) &key)
(release-context context))
(defstruct (rgba-icon
(:constructor rgba-icon (width height data))
(:predicate NIL))
(width 0 :type (unsigned-byte 16))
(height 0 :type (unsigned-byte 16))
(data #() :type (simple-array (unsigned-byte 8))))
(defgeneric create-child-context (context))
(defgeneric create-context (context))
(defgeneric destroy-context (context))
(defgeneric valid-p (context))
(defgeneric make-current (context))
(defgeneric current-p (context &optional thread))
(defgeneric done-current (context))
(defgeneric hide (context))
(defgeneric show (context &key &allow-other-keys))
(defgeneric visible-p (context))
(defgeneric resize (context width height))
(defgeneric quit (context))
(defgeneric swap-buffers (context))
(defgeneric show-cursor (context))
(defgeneric hide-cursor (context))
(defgeneric lock-cursor (context))
(defgeneric unlock-cursor (context))
(defgeneric cursor (context))
(defgeneric (setf cursor) (cursor context))
(defgeneric title (context))
(defgeneric (setf title) (value context))
(defgeneric vsync (context))
(defgeneric (setf vsync) (mode context))
(defgeneric current-monitor (context))
(defgeneric list-monitors (context))
(defgeneric list-video-modes (monitor))
(defgeneric find-monitor (name context))
(defgeneric clipboard (context))
(defgeneric (setf clipboard) (value context))
(defgeneric cursor-position (context))
(defgeneric (setf cursor-position) (pos context))
(defgeneric local-key-string (context scan-code))
(defgeneric (setf icon) (icon context))
(defgeneric width (context))
(defgeneric height (context))
(defgeneric profile (context))
(defgeneric version (context))
(defmethod finalize ((context context))
(destroy-context context)
(call-next-method))
(defmethod create-child-context ((context context))
(let ((restore (current-p context))
(child (make-instance 'context :share-with context)))
(create-context child)
(when restore
(done-current child)
(make-current context))
child))
(defmethod destroy-context :around ((context context))
(when (valid-p context)
(with-context (context :force T)
(v:info :trial.context "Destroying context.")
(hide context)
(call-next-method)
(setf *context* NIL)))
context)
(defmethod create-context :around ((context context))
(unless (valid-p context)
(call-next-method)
(v:info :trial.context "Recreated context successfully.")
(make-current context)
(context-note-debug-info context))
context)
(defmethod current-p ((context context) &optional (thread (bt:current-thread)))
(eql thread (current-thread context)))
(defun check-context-current (&optional (context *context*) (thread (bt:current-thread)))
(when (or (null context) (not (current-p context thread)))
(error "Context~% ~a~%is not current in~% ~a" context thread)))
(defmethod acquire-context ((context context) &key force)
(let ((current (current-thread context))
(this (bt:current-thread)))
(when (or force (not (eql this current)))
(cond ((and force current)
(v:warn :trial.context "~a stealing ~a from ~a." this context current))
((eql this current))
(current
;; FIXME: deadlocks somewhere
(bt:with-lock-held ((context-wait-lock context))
(incf (context-waiting context))
(v:info :trial.context "~a waiting to acquire ~a (~a in queue)..." this context (context-waiting context)))
(unwind-protect
(bt:acquire-lock (context-lock context))
(bt:with-lock-held ((context-wait-lock context))
(decf (context-waiting context)))))
(T
(bt:acquire-lock (context-lock context))))
(unless (valid-p context)
(error "Attempting to acquire invalid context ~a" context))
(v:info :trial.context "~a acquiring ~a." this context)
(setf (current-thread context) this)
(setf *context* context)
#+trial-release
(loop repeat 10
do (handler-case (progn (make-current context) (return))
(error ()))
(sleep 0.1))
#-trial-release
(make-current context))))
(defmethod release-context ((context context) &key reentrant)
(let ((current (current-thread context))
(this (bt:current-thread)))
(when (and (eql this current)
(or (not reentrant) (< 0 (context-waiting context))))
(cond ((eql *context* context)
(v:info :trial.context "~a releasing ~a." this context)
(setf (current-thread context) NIL)
(when (valid-p context)
(done-current context))
(bt:release-lock (context-lock context)))
(T
(v:warn :trial.context "~a attempted to release ~a even though ~a is active."
this context *context*))))))
(defmethod find-monitor (name (context context))
(find name (list-monitors context) :key #'name :test #'string=))
(defmethod list-video-modes :around ((context context))
(flet ((mode> (a b)
(destructuring-bind (aw ah ar am) a
(destructuring-bind (bw bh br bm) b
(if (eq am bm)
(if (= aw bw)
(if (= ah bh)
(> ar br)
(> ah bh))
(> aw bw))
(string> am bm))))))
(sort (delete-duplicates (call-next-method) :test #'equal) #'mode>)))
(defmethod list-video-modes ((context context))
(list-video-modes (current-monitor context)))
(defmethod size ((context context))
(vec (width context) (height context)))
(define-event resize () width height)
(define-event gain-focus ())
(define-event lose-focus ())
(define-event window-hidden ())
(define-event window-shown ())
(define-event window-close ())
(defmethod describe-object :after ((context context) stream)
(context-info context :stream stream))
(defun context-info (context &key (stream *standard-output*) (show-extensions T))
(format stream "OpenGL Version: ~a.~a ~a~%~
Sample buffers: ~a (~a sample~:p)~%~
Max texture size: ~a~%~
Max texture units: ~a ~a ~a ~a ~a ~a~%~
~@[~{Max compute groups: ~a ~a ~a~%~
Max work groups: ~a ~a ~a (~a)~%~}~]~
GL Vendor: ~a~%~
GL Renderer: ~a~%~
GL Version: ~a~%~
GL Shader Language: ~a~%~
~@[GL Extensions: ~{~a~^ ~}~%~]"
(gl-property :major-version)
(gl-property :minor-version)
(profile context)
(gl-property :sample-buffers)
(gl-property :samples)
(gl-property :max-texture-size)
(gl-property :max-vertex-texture-image-units)
;; Fuck you, GL, and your stupid legacy crap.
(gl-property :max-texture-image-units)
(gl-property :max-tess-control-texture-image-units)
(gl-property :max-tess-evaluation-texture-image-units)
(gl-property :max-geometry-texture-image-units)
(gl-property :max-compute-texture-image-units)
(when-gl-extension :GL-ARB-COMPUTE-SHADER
(append (coerce (gl-property :max-compute-work-group-count) 'list)
(coerce (gl-property :max-compute-work-group-size) 'list)
(list (gl-property :max-compute-work-group-invocations))))
(gl-property :vendor)
(gl-property :renderer)
(gl-property :version)
(gl-property :shading-language-version)
(when show-extensions
(ignore-errors
(loop for i from 0 below (gl:get* :num-extensions)
collect (gl:get-string-i :extensions i))))))
(defun context-note-debug-info (context)
(v:debug :trial.context "Context information: ~%~@< ~@;~a~;~:>"
(let ((*print-right-margin* 1000)) ; SBCL fails otherwise. Huh?
(with-output-to-string (out)
(context-info context :stream out)))))
(defmethod glsl-target-version ((context context))
(let ((slot (slot-value context 'glsl-target-version)))
(or slot (format NIL "~{~d~d~}0" (version context)))))
(defmethod glsl-version-header ((context context))
(format NIL "#version ~a~@[ ~a~]"
(glsl-target-version context)
(case (profile context)
(:core "core")
(:es "es"))))
(defmethod glsl-target-version ((default (eql T)))
(if *context* (glsl-target-version *context*) "330"))
(defmethod (setf icon) ((path pathname) (context context))
(multiple-value-bind (bits width height pixel-type pixel-format swizzle)
(load-image path T)
(let* ((swizzle (or swizzle (infer-swizzle-format pixel-format)))
(data (convert-image-data bits width height :pixel-type-in pixel-type :pixel-format-in pixel-format :swizzle swizzle
:pixel-type-out :unsigned-byte :pixel-format-out :rgba)))
(setf (icon context) (rgba-icon width height data)))))
(defmethod (setf cursor) ((path pathname) (context context))
(multiple-value-bind (bits width height pixel-type pixel-format swizzle)
(load-image path T)
(let* ((swizzle (or swizzle (infer-swizzle-format pixel-format)))
(data (convert-image-data bits width height :pixel-type-in pixel-type :pixel-format-in pixel-format :swizzle swizzle
:pixel-type-out :unsigned-byte :pixel-format-out :rgba)))
(setf (cursor context) (rgba-icon width height data)))))