Struct SubPixmapMut 

pub struct SubPixmapMut<'a> {
    pub data: &'a mut [u8],
    pub size: IntSize,
    pub real_width: usize,
}

A PixmapMut subregion.

Unlike PixmapMut, contains real_width which references the parent PixmapMut width. This way we can operate on a PixmapMut subregion without reallocations. Primarily required because of DrawTiler.

We cannot implement it in PixmapMut directly, because it will brake fill, data_mut pixels_mut and other similar methods. This is because SubPixmapMut.data references more “data” than it actually allowed to access. On the other hand, PixmapMut.data can access all it’s data and it’s stored linearly.

Fields

data: &'a mut [u8]

size: IntSize

real_width: usize

Implementations

impl<'a> SubPixmapMut<'a>

pub(crate) fn offset(&self, dx: usize, dy: usize) -> usize

pub(crate) fn slice_at_xy( &mut self, dx: usize, dy: usize, ) -> &mut [PremultipliedColorU8]

pub(crate) fn slice_mask_at_xy(&mut self, dx: usize, dy: usize) -> &mut [u8]

pub(crate) fn slice4_at_xy( &mut self, dx: usize, dy: usize, ) -> &mut [PremultipliedColorU8; 8]

pub(crate) fn slice16_at_xy( &mut self, dx: usize, dy: usize, ) -> &mut [PremultipliedColorU8; 16]

pub(crate) fn slice16_mask_at_xy( &mut self, dx: usize, dy: usize, ) -> &mut [u8; 16]

impl<'a> SubPixmapMut<'a>

pub fn pixels_mut(&mut self) -> &mut [PremultipliedColorU8]

Returns a mutable slice of pixels.