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Draw a complete circle.  | 
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Clear the current viewport.  | 
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Hook to directly draw a pixel on the screen.  | 
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Return current background color.  | 
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Return a copy of a screen area.  | 
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Return color of pixel.  | 
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Hook to set a RGB palette entries.  | 
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Hook to get a scan line from the screen.  | 
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Hook to free heap memory.  | 
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Hook to get heap memory.  | 
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Hook to draw a solid horizontal line.  | 
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Return size to store image.  | 
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Hook to draw an ellipse.  | 
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Draw a line between 2 points.  | 
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Write text on the screen on given position.  | 
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Hook to draw a patterned line.  | 
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Draw an in-memory image to the screen.  | 
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Draw a pixel on the screen.  | 
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Hook to restore a saved video mode.  | 
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Hook to save the current video state.  | 
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Set active graphical page.  | 
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Specify a complete new palette.  | 
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Set background drawing color.  | 
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Set palette entry using RGB value.  | 
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Set video page which is displayed.  | 
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Hook to draw a solid vertical line.  |