emacs 的Cairo 绘图有什么用啊

Emacs-general
13

编译27时候要有--with-cairo选项。

然后设置字体

(defsubst walle-ui-display-color-emoji? ()
  "Return non-nil if emacs can display color emoji.

Notice that this function assume you have graphics display."
  (or (and (>= emacs-major-version 27)
           (featurep 'cairo)
           (memq 'ftcrhb (frame-parameter (selected-frame) 'font-backend)))
      (featurep 'cocoa)))

(when (walle-ui-display-color-emoji?)
  (set-fontset-font t 'symbol (font-spec :family "Noto Color Emoji")
                    nil 'prepend))

Mac的话 @LdBeth 说macport早就有了，应该不用特意弄

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