Struct extendr_api::graphics::R_GE_gcontext

#[repr(C)]
pub struct R_GE_gcontext {

    pub col: i32,
    pub fill: i32,
    pub gamma: f64,
    pub lwd: f64,
    pub lty: i32,
    pub lend: u32,
    pub ljoin: u32,
    pub lmitre: f64,
    pub cex: f64,
    pub ps: f64,
    pub lineheight: f64,
    pub fontface: i32,
    pub fontfamily: [i8; 201],
    pub patternFill: *mut SEXPREC,
}

A structure containing graphical parameters

This is how graphical parameters are passed from graphics systems to the graphics engine AND from the graphics engine to graphics devices.

Devices are not required to honour graphical parameters (e.g., alpha transparency is going to be tough for some)

Fields

col: i32

pen colour (lines, text, borders, …)

fill: i32

fill colour (for polygons, circles, rects, …)

gamma: f64

Gamma correction

lwd: f64

Line width (roughly number of pixels)

lty: i32

Line type (solid, dashed, dotted, …)

lend: u32

Line end

ljoin: u32

line join

lmitre: f64

line mitre

cex: f64

Character expansion (font size = fontsize*cex)

ps: f64

Font size in points

lineheight: f64

Line height (multiply by font size)

fontface: i32

Font face (plain, italic, bold, …)

fontfamily: [i8; 201]

Font family

patternFill: *mut SEXPREC

Reference to a pattern fill

Trait Implementations

impl Clone for R_GE_gcontext

fn clone(&self) -> R_GE_gcontext

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for R_GE_gcontext

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Copy for R_GE_gcontext