Module symbols 

Border, gridline, and partial-block char data shared by widgets and backends. char data for drawing borders, gridlines, and partial-block glyphs, plus the pixel-to-glyph matching logic that picks one of those glyphs for a raw pixel block.

Every set here is plain const data with no rendering logic of its own, so a widget crate, a backend, or a caller drawing its own frame can all reach the same glyphs instead of retyping Unicode box-drawing literals. crate::symbols::border and crate::symbols::line cover whole-cell frame/gridline drawing; crate::symbols::block and crate::symbols::bar cover the partial-block glyphs used for horizontal and vertical fill ramps (progress bars, gauges, sparklines); crate::symbols::braille covers the 2x4-dot glyphs used for higher-resolution point/line plotting than a single block cell allows. quantize_half_block, quantize_quadrant, and quantize_sextant are the one exception: they posterize a block of raw pixels down to the best-matching glyph from HALF_BLOCKS/ QUADRANTS/SEXTANTS, the actual matching algorithm alongside the data it searches over.

Modules

bar

Vertical, bottom-anchored eighth-block glyphs (▁▂▃▄▅▆▇█), for a bar that fills a cell from the bottom edge: the ramp a sparkline, gauge, or meter widget uses for one column’s worth of magnitude.

block

Horizontal, left-anchored eighth-block glyphs (█▉▊▋▌▍▎▏).

border

Whole-cell box-border glyph sets: PLAIN, ROUNDED, DOUBLE, and THICK.

braille

Unicode Braille Patterns (U+2800..=U+28FF), addressed as a 2-column by 4-row dot grid.

line

Gridline glyph sets, for drawing dividers that cross or tee into each other rather than an outer frame: NORMAL, DOUBLE, THICK.

Structs

BorderSet

The six glyphs that make up a single-style box border.

Glyph

A posterized pixel block: the best-matching glyph plus its foreground and background colors.

LineSet

The seven glyphs needed to draw a gridline that can cross, tee, or run straight through a cell, as used by table/grid dividers rather than an outer BorderSet frame.

Constants

HALF_BLOCKS

The Unicode Block Elements glyphs for a 1-wide x 2-tall pixel block, indexed by a 2-bit pattern (bit 0 = top pixel set, bit 1 = bottom pixel set).

QUADRANTS

The 16 quadrant block glyphs for a 2x2 pixel block, indexed by a 4-bit pattern in row-major order (bit 0 = top-left, bit 1 = top-right, bit 2 = bottom-left, bit 3 = bottom-right).

SEXTANTS

The 64 sextant glyphs for a 2x3 pixel block.

Functions

quantize_half_block

Posterizes a 1-wide x 2-tall pixel block ([top, bottom]) to ' '/▀/▄/█ plus two representative colors.

quantize_quadrant

Posterizes a 2x2 pixel block ([top_left, top_right, bottom_left, bottom_right]) to one of the 16 quadrant block glyphs plus two representative colors.

quantize_sextant

Posterizes a 2-wide x 3-tall pixel block ([top_left, top_right, mid_left, mid_right, bottom_left, bottom_right]) to one of the 64 sextant glyphs plus two representative colors.

Type Aliases

Pixel

A raw 24-bit RGB pixel sample: (r, g, b), one byte per channel.