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38 lines
1.2 KiB
Common Lisp
38 lines
1.2 KiB
Common Lisp
(defpackage #:clog-tut-10
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(:use #:cl #:clog)
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(:export start-tutorial))
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(in-package :clog-tut-10)
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;;; A very brief example of using the canvas control.
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(defun on-new-window (body)
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(setf (title (html-document body)) "Tutorial 10")
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(let* ((canvas (create-canvas body :width 600 :height 400))
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(cx (create-context2d canvas))
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dat)
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(set-border canvas :thin :solid :black)
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(setf (fill-style cx) :green)
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(fill-rect cx 10 10 150 100)
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(setf (fill-style cx) :blue
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(font-style cx) "bold 24px serif")
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(fill-text cx "Hello World" 10 150)
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(begin-path cx)
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(let ((gr (create-linear-gradient cx 20 0 220 0)))
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(add-color-stop gr 0 :red)
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(add-color-stop gr .5 :cyan)
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(add-color-stop gr 1 :yellow)
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(setf (fill-style cx) gr))
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(ellipse cx 200 200 50 7 0.78 0 6.29)
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(path-stroke cx)
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(path-fill cx)
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(setf dat (get-image-data cx 100 100 10 10))
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(put-image-data cx dat 10 200)
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(let ((data (json-image-data dat)))
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(setf data (ppcre:regex-replace-all ":0" data ":255"))
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(setf (json-image-data dat) data))
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(put-image-data cx dat 30 200)))
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(defun start-tutorial ()
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"Start tutorial."
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(initialize 'on-new-window)
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(open-browser))
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