Struct PixmapMut

pub struct PixmapMut<'a> { /* private fields */ }

A container that references mutable premultiplied RGBA pixels.

Can be created from Pixmap or from a user provided data.

The data is not aligned, therefore width == stride.

Implementations

impl<'a> PixmapMut<'a>

pub fn from_bytes(data: &'a mut [u8], width: u32, height: u32) -> Option<Self>

Creates a new PixmapMut from bytes.

The size must be at least size.width() * size.height() * BYTES_PER_PIXEL. Zero size in an error. Width is limited by i32::MAX/4.

The data is assumed to have premultiplied RGBA pixels (byteorder: RGBA).

pub fn to_owned(&self) -> Pixmap

Creates a new Pixmap from the current data.

Clones the underlying data.

pub fn as_ref(&self) -> PixmapRef<'_>

Returns a container that references Pixmap’s data.

pub fn width(&self) -> u32

Returns pixmap’s width.

pub fn height(&self) -> u32

Returns pixmap’s height.

pub fn fill(&mut self, color: Color)

Fills the entire pixmap with a specified color.

pub fn data_mut(&mut self) -> &mut [u8]

Returns the mutable internal data.

Byteorder: RGBA

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

Returns a mutable slice of pixels.

impl PixmapMut<'_>

pub fn fill_rect( &mut self, rect: Rect, paint: &Paint<'_>, transform: Transform, mask: Option<&Mask>, )

Draws a filled rectangle onto the pixmap.

This function is usually slower than filling a rectangular path, but it produces better results. Mainly it doesn’t suffer from weird clipping of horizontal/vertical edges.

Used mainly to render a pixmap onto a pixmap.

Returns None when there is nothing to fill or in case of a numeric overflow.

pub fn fill_path( &mut self, path: &Path, paint: &Paint<'_>, fill_rule: FillRule, transform: Transform, mask: Option<&Mask>, )

Draws a filled path onto the pixmap.

pub fn stroke_path( &mut self, path: &Path, paint: &Paint<'_>, stroke: &Stroke, transform: Transform, mask: Option<&Mask>, )

Strokes a path.

Stroking is implemented using two separate algorithms:

1. If a stroke width is wider than 1px (after applying the transformation), a path will be converted into a stroked path and then filled using fill_path. Which means that we have to allocate a separate Path, that can be 2-3x larger then the original path.
2. If a stroke width is thinner than 1px (after applying the transformation), we will use hairline stroking, which doesn’t involve a separate path allocation.

Also, if a stroke has a dash array, then path will be converted into a dashed path first and then stroked. Which means a yet another allocation.

pub fn draw_pixmap( &mut self, x: i32, y: i32, pixmap: PixmapRef<'_>, paint: &PixmapPaint, transform: Transform, mask: Option<&Mask>, )

Draws a Pixmap on top of the current Pixmap.

The same as filling a rectangle with a pixmap pattern.

pub fn apply_mask(&mut self, mask: &Mask)

Applies a masks.

When a Mask is passed to drawing methods, it will be used to mask-out content we’re about to draw. This method masks-out an already drawn content. It’s not as fast, but can be useful when a mask is not available during drawing.

This method is similar to filling the whole pixmap with an another, mask-like pixmap using the DestinationOut blend mode.

Mask must have the same size as Pixmap. No transform or offset are allowed.

Trait Implementations

impl Debug for PixmapMut<'_>

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

Formats the value using the given formatter.

impl<'a> PartialEq for PixmapMut<'a>

fn eq(&self, other: &PixmapMut<'a>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a> StructuralPartialEq for PixmapMut<'a>