create-dummy-graphics-port

create-dummy-graphics-port Function

Summary

Creates a graphics port object that can be used for querying fonts and measuring text or images.

Package

capi

Signature

create-dummy-graphics-port &optional screen => graphics-port

Arguments

screen⇩

A value suitable as the argument to convert-to-screen.

Values

graphics-port⇩

A graphics port.

Description

The function create-dummy-graphics-port creates a graphics port object that can be used for font queries, measuring text and images.

graphics-port is a graphics port object associated with screen. graphics-port is never visible on the screen, but can be used to query fonts, measure text and load images to obtain their width and height. Drawing functions are not supported.