bittermelon (version 2.2.1)

plot.bm_matrix: Plot bitmap/pixmap objects

Description

plot.bm_bitmap() plots a bm_bitmap() object to the graphics device while plot.bm_pixmap() plots a bm_pixmap() object to the graphics device. They are wrappers around grid::grid.raster() and as.raster.bm_bitmap() or as.raster.bm_pixmap(). which converts a bitmap glyph object to a raster object. col_bitmap is a builtin color string vectors intended for use with the col argument for casting bm_bitmap() objects to pixmap objects.

Usage

# S3 method for bm_bitmap
plot(
  x,
  ...,
  col = getOption("bittermelon.col", col_bitmap),
  interpolate = FALSE
)
# S3 method for bm_pixmap
plot(x, ..., interpolate = FALSE)
# S3 method for bm_bitmap
as.raster(
  x,
  native = FALSE,
  ...,
  col = getOption("bittermelon.col", col_bitmap)
)
# S3 method for bm_pixmap
as.raster(x, native = FALSE, ...)
col_bitmap

Value

plot.bm_bitmap() and plot.bm_pixmap() return a grid::rasterGrob() object silently. As a side effect will draw to graphics device. as.raster.bm_bitmap() and as.raster.bm_pixmap() return "raster" objects (see grDevices::as.raster()).

Format

An object of class character of length 4.

Arguments

x

A bm_bitmap() object

...

Passed to grid::grid.raster().

col

Character vector of R color specifications. First color is used for values equal to 0, second color for values equal to 1, etc.

interpolate

Passed to grid::grid.raster().

native

If TRUE return a "nativeRaster" object instead of a "raster" object. This will require that the suggested package farver is installed.

See Also

bm_bitmap(), bm_pixmap()

Examples

font_file <- system.file("fonts/spleen/spleen-8x16.hex.gz", package = "bittermelon")
font <- read_hex(font_file)
capital_r <- bm_extend(font[[str2ucp("R")]], left = 1L)
capital_r <- bm_extend(capital_r, sides = 1L, value = 2L)  # add a border effect

plot(capital_r)

plot(capital_r, col = c("yellow", "blue", "red"))

crops <- farming_crops_16x16()
grapes <- crops$grapes$portrait
plot(grapes)