RGtk2 (version 2.20.31)

cairoFormatStrideForWidth: cairoFormatStrideForWidth

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.

Value

format and width, or -1 if either the format is invalid or the width too large.

Details

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

Since 1.6