bittermelon (version 2.2.1)

bm_bitmap: Bittermelon bitmap matrix object

Description

bm_bitmap() creates an S3 matrix subclass representing a bitmap.

Usage

bm_bitmap(x)

Value

An integer matrix with “bm_bitmap” and “bm_matrix” subclasses.

Arguments

x

Object to be converted to bm_bitmap(). If not already an integer matrix it will be cast to one by as_bm_bitmap().

Supported S3 methods

• [.bm_bitmap and [<-.bm_bitmap

• as.matrix.bm_bitmap()

• as.raster.bm_bitmap() and plot.bm_bitmap()

• cbind.bm_bitmap() and rbind.bm_bitmap()

• format.bm_bitmap() and print.bm_bitmap()

• Ops.bm_bitmap() for all the S3 “Ops” Group generic functions

Details

• Intended to represent binary bitmaps especially (but not limited to) bitmap font glyphs.

• Bitmaps are represented as integer matrices with special class methods.

• The bottom left pixel is represented by the first row and first column.

• The bottom right pixel is represented by the first row and last column.

• The top left pixel is represented by the last row and first column.

• The top right pixel is represented by the last row and last column.

• Non-binary bitmaps are supported (the integer can be any non-negative integer) but we are unlikely to ever support exporting color bitmap fonts.

• Non-binary bitmaps can be cast to binary bitmaps via bm_clamp().

• See bm_pixmap() for an alternative S3 object backed by a color string matrix.

See Also

as_bm_bitmap(), is_bm_bitmap()

Examples

 space <- bm_bitmap(matrix(0, nrow = 16, ncol = 16))
 print(space)