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text.lisp
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text.lisp
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(in-package #:org.shirakumo.fraf.trial)
(define-asset (trial ascii) image
#p"ascii.raw"
:internal-format :red
:swizzle '(:r :r :r 1)
:min-filter :nearest
:mag-filter :nearest)
(defun print-ascii-text (text array &key (glyph-width 9) (glyph-height 17) (adjust T) (start 0) (x 0) (y 0) (z 0) (scale 1.0))
(let ((i start)
(xi (float x 0f0))
(yi (float y 0f0))
(z (float z 0f0))
(max-x 0.0)
(gw (float glyph-width))
(gh (float glyph-height)))
(when adjust
(adjust-array array (+ start (* 5 6 (length text)))))
(macrolet ((vertex (&rest vals)
`(progn ,@(loop for val in vals
collect `(progn (setf (aref array i) ,val)
(incf i))))))
(flet ((print-letter (char)
(let* ((c (clamp 0 (- (char-code char) (char-code #\Space)) 95))
(u0 (* gw (+ 0 c)))
(u1 (* gw (+ 1 c))))
(vertex (* scale (+ xi 0.0)) (* scale (+ yi 0.0)) z u0 0.0)
(vertex (* scale (+ xi gw)) (* scale (+ yi 0.0)) z u1 0.0)
(vertex (* scale (+ xi gw)) (* scale (+ yi gh)) z u1 gh)
(vertex (* scale (+ xi gw)) (* scale (+ yi gh)) z u1 gh)
(vertex (* scale (+ xi 0.0)) (* scale (+ yi gh)) z u0 gh)
(vertex (* scale (+ xi 0.0)) (* scale (+ yi 0.0)) z u0 0.0)
(incf xi gw))))
(loop for char across text
do (case char
(#\Linefeed
(when (< max-x xi)
(setf max-x xi))
(setf xi x)
(decf yi gh))
(#\Return)
(T (print-letter char))))))
(values i (- max-x x) (- y))))
(define-shader-entity debug-text (located-entity vertex-entity textured-entity standalone-shader-entity)
((texture :initarg :font :initform (// 'trial 'ascii) :accessor font)
(text :initarg :text :initform "" :accessor text)
(size :initform (vec 0 0) :accessor size)
(font-size :initform 17.0 :accessor font-size)
(foreground :initarg :foreground :initform (vec4 0 0 0 1) :accessor foreground)
(background :initarg :background :initform (vec4 0 0 0 0) :accessor background))
(:inhibit-shaders (textured-entity :fragment-shader)))
(defmethod initialize-instance :after ((text debug-text) &key)
(let* ((array (make-array 0 :element-type 'single-float :adjustable T))
(vbo (make-instance 'vertex-buffer :buffer-data array))
(vao (make-instance 'vertex-array :bindings `((,vbo :size 3 :offset 0 :stride 20 :index 0)
(,vbo :size 2 :offset 12 :stride 20 :index 2)))))
(setf (vertex-array text) vao)
(setf (text text) (text text))))
(defmethod (setf text) :after (_ (text debug-text))
(let* ((vao (vertex-array text))
(vbo (caar (bindings vao)))
(array (buffer-data vbo)))
(multiple-value-bind (i w h) (print-ascii-text (text text) array :scale (/ (font-size text) 17))
(vsetf (size text) w h)
(setf (size vao) (truncate i 5)))
(when (allocated-p vao)
(resize-buffer-data vbo (* 4 (length array)) :data array))))
(defmethod render :before ((text debug-text) (program shader-program))
(setf (uniform program "foreground") (foreground text))
(setf (uniform program "background") (background text)))
(define-class-shader (debug-text :vertex-shader)
"out vec2 uv;
uniform sampler2D texture_image;
void main@after(){
uv /= textureSize(texture_image, 0).rg;
}")
(define-class-shader (debug-text :fragment-shader)
"in vec2 uv;
out vec4 color;
uniform sampler2D texture_image;
uniform vec4 foreground;
uniform vec4 background;
void main(){
float fg_bg = texture(texture_image, uv, 0).r;
color = mix(foreground, background, fg_bg);
}")
(define-shader-entity repl (debug-text listener)
((text :initform (make-array 4096 :adjustable T :fill-pointer T :element-type 'character))
(history :initform (make-array 32 :adjustable T :fill-pointer 0) :accessor history)
(history-index :initform 0 :accessor history-index)
(line-count :initform 40 :initarg :line-count :accessor line-count)
(input-start :initform 0 :accessor input-start)))
(defmethod initialize-instance :after ((repl repl) &key)
(format (text repl) "~%This is ~a ~a, an implementation of ANSI Common Lisp.
as ~a @ ~a
on ~a ~a,
a ~a ~a machine
with ~a ~a~%"
(lisp-implementation-type) (lisp-implementation-version)
(username T) (machine-instance)
(software-type) (software-version)
(machine-type) (machine-version)
+app-system+ (version :app))
(setf (text repl) (text repl))
(output-result () repl))
(define-handler (repl text-entered) (text)
(loop for char across text do (vector-push-extend char (text repl)))
(setf (text repl) (text repl)))
(define-handler (repl key-press) (key)
(let ((text (text repl)))
(case key
(:up
(decf (history-index repl)))
(:down
(incf (history-index repl)))
(:backspace
(when (< (input-start repl) (length text))
(decf (fill-pointer text))
(setf (text repl) text)))
((:enter :return)
(if (= (input-start repl) (length text))
(output-result () repl)
(handler-case
(let ((start (shiftf (input-start repl) (length text))))
(vector-push-extend (subseq text start) (history repl))
(setf (history-index repl) (length (history repl)))
(let* ((- (read-from-string text T NIL :start start))
(values (multiple-value-list (eval -))))
(shiftf *** ** * (first values))
(shiftf /// cl:// / values)
(shiftf +++ ++ + -)
(output-result values repl)))
(error (e)
(format (text repl) "~%ERROR: ~a~%" e)
(output-result () repl))))))))
(defmethod (setf history-index) :around (index (repl repl))
(call-next-method (clamp 0 index (length (history repl))) repl))
(defmethod (setf history-index) :after (index (repl repl))
(let ((history-item (if (< index (length (history repl)))
(aref (history repl) index))))
(setf (fill-pointer (text repl)) (+ (input-start repl) (length history-item)))
(replace (text repl) history-item :start1 (input-start repl))
(setf (text repl) (text repl))))
(defmethod output-result (values (repl repl))
(let ((text (text repl)))
(format text "~{~%~s~}" values)
(format text "~%~a> " (package-abbreviation *package*))
;; Scroll lines
(let ((to-remove (- (loop for char across text
count (char= char #\Linefeed))
(line-count repl))))
(loop for i from 0 below (length text)
do (when (<= to-remove 0)
(array-utils:array-shift text :n (- i))
(return))
(when (char= (char text i) #\Linefeed)
(decf to-remove))))
(setf (input-start repl) (length text))
(setf (text repl) text)))