cairoFormatStrideForWidth: cairoFormatStrideForWidth

In RGtk2: R Bindings for Gtk 2.8.0 and Above

Description

This function provides a stride value that will respect all alignment requirements of the accelerated image-rendering code within cairo. Typical usage will be of the form:

Usage

cairoFormatStrideForWidth(format, width)

Arguments

format	[CairoFormat] A CairoFormat value
width	[integer] The desired width of an image surface to be created.

Details

stride <- format$strideForWidth(width)
data <- raw(stride * height)
surface <- cairoImageSurfaceCreateForData(data, format, width, height, stride)

Since 1.6

Value

[integer] the appropriate stride to use given the desired format and width, or -1 if either the format is invalid or the width too large.

Author(s)

Derived by RGtkGen from GTK+ documentation

RGtk2 documentation built on Oct. 14, 2021, 5:08 p.m.