Struct ImmutableBitmap 

pub struct ImmutableBitmap { /* private fields */ }

Immutable Skia bitmap.

Implementations

impl ImmutableBitmap

pub fn from_stream(stream: &mut dyn Read) -> Result<Self>

Creates an immutable bitmap from the given stream.

pub fn from_image( image: Image, custom_image_dispose: Option<Box<dyn FnOnce(Image) + Send>>, ) -> Self

Wraps a Skia image. custom_image_dispose replaces releasing the image when the bitmap is disposed: it is handed the image, to release it where that has to happen (with a graphics context current).

pub fn resized( src: &ImmutableBitmap, destination_size: PixelSize, interpolation_mode: BitmapInterpolationMode, ) -> Result<Self>

Creates a resized copy of src.

pub fn from_stream_to_size( stream: &mut dyn Read, decode_size: i32, horizontal: bool, interpolation_mode: BitmapInterpolationMode, ) -> Result<Self>

Creates an immutable bitmap from a stream, decoded so that its width (horizontal) or height is decode_size.

pub fn from_pixels( size: PixelSize, dpi: Vector, stride: i32, format: PixelFormat, alpha_format: AlphaFormat, data: &[u8], ) -> Result<Self>

Creates an immutable bitmap from raw pixel data, which is copied.

data holds |stride| * size.height bytes. A negative stride means the rows are stored bottom-up: the first row of the image is the last row of data.

pub fn image(&self) -> Image

The Skia image.

Panics

Panics when the bitmap has been disposed.

Trait Implementations

impl IBitmapImpl for ImmutableBitmap

fn dpi(&self) -> Vector

The dots per inch (DPI) of the image.

fn pixel_size(&self) -> PixelSize

The size of the bitmap, in device pixels.

fn version(&self) -> i32

Version of the pixel data: incremented whenever the content changes.

fn save( &self, stream: &mut dyn Write, options: &BitmapEncoderOptions, ) -> Result<()>

Saves the bitmap to a stream, encoded as selected by options.

fn dispose(&self)

Releases the bitmap’s resources.

fn as_any(&self) -> &dyn Any

Lets the backend recover its concrete type.

fn as_readable_bitmap(&self) -> Option<&dyn IReadableBitmapImpl>

The bitmap viewed as IReadableBitmapImpl, when its pixels can be read.

impl IDrawableBitmapImpl for ImmutableBitmap

fn draw( &self, gr_context: Option<&dyn ISkiaGrContext>, canvas: &Canvas, source_rect: &Rect, dest_rect: &Rect, sampling_options: SamplingOptions, paint: &Paint, )

Draws the bitmap onto a canvas.

impl IReadableBitmapImpl for ImmutableBitmap

fn format(&self) -> Option<PixelFormat>

The pixel format, if known.

fn alpha_format(&self) -> Option<AlphaFormat>

The alpha format, if known.

fn lock(&self) -> Rc<dyn ILockedFramebuffer>

Locks the pixels for reading (and writing, for writeable bitmaps).