Struct Strip 

pub struct Strip {
    pub cell: i32,
    pub rows: i32,
    pub x0: i32,
    pub row0: i32,
}

A window onto the sprite sheet, filling the band: rows sheet rows from row0, drawn at cell pixels a side.

Blocks up to four cells tall are shown at full size, four rows to a page. A taller one would run off the bottom of the band, so the strip halves its cells to fit eight rows instead and follows the block rather than the page — the point of the strip being to show what is selected.

Fields

cell: i32

Screen side of one cell.

rows: i32

Sheet rows on show.

x0: i32

Left edge: half-size cells are half as wide, so the strip sits centred.

row0: i32

First sheet row on show.

Implementations

impl Strip

pub fn new(size: i32, row: i32, page: u32) -> Self

The strip for a size-cell block whose top-left is at sheet row row, with page choosing the rows whenever the block leaves a choice.

pub fn follows_block(size: i32) -> bool

Whether the strip follows the block instead of the page, which it does once the block no longer fits the band at full size.

pub fn cell_at(&self, top: i32, x: i32, y: i32) -> Option<(i32, i32)>

The sheet cell (column, row) at screen point (x, y), for a strip with its top edge at top.

pub fn draw(&self, fb: &mut Framebuffer, sprites: &SpriteSheet, top: i32)

Paint the band and the rows on show, sampling the sheet down when the cells are at half size.

pub fn draw_block( &self, fb: &mut Framebuffer, top: i32, col: i32, row: i32, size: i32, )

Box the size-cell block at sheet cell (col, row), clipped to the rows on show — a block the strip does not follow can start on another page.

Trait Implementations

impl Clone for Strip

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Strip

impl Debug for Strip

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

Formats the value using the given formatter.