(PECL haru >= 0.0.1) Append a circle to the current path
(PECL haru >= 0.0.1) Set font and fontsize for the page
(PECL haru >= 0.0.1) Get the current text rendering mode
(PECL haru >= 0.0.1) Set line join style for the page
(PECL haru >= 0.0.1) Get the current stroking color
(PECL haru >= 0.0.1) Get the current line cap style
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