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gradients

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This commit is contained in:
David Botton 2022-08-22 01:23:50 -04:00
parent 42a5efd09d
commit 80904d7d19
3 changed files with 92 additions and 10 deletions
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7
tutorial/10-tutorial.lisp
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@ -6,7 +6,6 @@
;;; A very brief example of using the canvas control.
(defun on-new-window (body)
(debug-mode body)
(setf (title (html-document body)) "Tutorial 10")
(let* ((canvas (create-canvas body :width 600 :height 400))
(cx (create-context2d canvas))
@ -17,8 +16,12 @@
(setf (fill-style cx) :blue
(font-style cx) "bold 24px serif")
(fill-text cx "Hello World" 10 150)
(setf (fill-style cx) :red)
(begin-path cx)
(let ((gr (create-linear-gradient cx 20 0 220 0)))
(add-color-stop gr 0 :red)
(add-color-stop gr .5 :cyan)
(add-color-stop gr 1 :yellow)
(setf (fill-style cx) gr))
(ellipse cx 200 200 50 7 0.78 0 6.29)
(path-stroke cx)
(path-fill cx)