Struct RenderTargetBitmapImpl 

pub struct RenderTargetBitmapImpl { /* private fields */ }

A render target bitmap: a writeable bitmap that is drawn into through a framebuffer render target over its own pixels.

Implementations

impl RenderTargetBitmapImpl

pub fn new(size: PixelSize, dpi: Vector) -> Self

Creates a render target bitmap in the platform’s native pixel format.

pub fn is_corrupted(&self) -> bool

Whether the contents of the bitmap have been lost. Never the case for a bitmap in memory.

Trait Implementations

impl IBitmapImpl for RenderTargetBitmapImpl

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 RenderTargetBitmapImpl

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 IFramebufferPlatformSurface for RenderTargetBitmapImpl

fn create_framebuffer_render_target(&self) -> Rc<dyn IFramebufferRenderTarget>

Creates the framebuffer render target of the surface.

impl IPlatformRenderSurface for RenderTargetBitmapImpl

fn as_framebuffer_surface(&self) -> Option<&dyn IFramebufferPlatformSurface>

The surface as a framebuffer surface, if it is one.

fn as_any(&self) -> &dyn Any

Lets the backend recover the concrete surface type.

fn is_ready(&self) -> bool

Whether the surface is ready to be rendered to.

fn try_get_surface_kind(&self, _kind: TypeId) -> Option<Rc<dyn Any>>

The surface viewed as a surface kind defined outside this crate: for TypeId::of::<dyn IFoo>() the result holds an Rc<dyn IFoo>.

fn text_rendering_parameters(&self) -> Option<PlatformTextRenderingParameters>

The text rendering settings of the platform for this surface, when the platform knows them: the render backend asks for them every frame (they follow the settings of the system and the display the surface is on). A backend asks every surface of a top-level and takes the first answer; None from all of them gives the defaults of the backend (docs/porting/text-rendering.md).

impl IReadableBitmapImpl for RenderTargetBitmapImpl

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).

impl IRenderTargetBitmapImpl for RenderTargetBitmapImpl

fn create_drawing_context(&self) -> Box<dyn IDrawingContextImpl>

Creates a drawing context that draws into the bitmap.

impl IWriteableBitmapImpl for RenderTargetBitmapImpl