Struct NullDevice 

pub struct NullDevice { /* private fields */ }

A null rendering device that discards all output.

Implementations

impl NullDevice

pub fn new(width: u32, height: u32) -> Self

Trait Implementations

impl OutputDevice for NullDevice

fn fill_path(&mut self, _path: &PsPath, _params: &FillParams)

Fill a path with the given color.

fn stroke_path(&mut self, _path: &PsPath, _params: &StrokeParams)

Stroke a path with the given parameters.

fn clip_path(&mut self, _path: &PsPath, _params: &ClipParams)

Intersect the current clip region with the given path.

fn init_clip(&mut self)

Reset clipping to the full page.

fn erase_page(&mut self)

Erase the page (fill with white).

fn show_page(&mut self, _output_path: &str) -> Result<(), String>

Output the current page (e.g., save PNG) and return Ok/Err.

fn draw_image(&mut self, _sample_data: &[u8], _params: &ImageParams)

Draw an image from raw sample data.

fn page_size(&self) -> (u32, u32)

Page dimensions in device pixels.

fn paint_axial_shading(&mut self, _params: &AxialShadingParams)

Paint an axial (linear) gradient shading.

fn paint_radial_shading(&mut self, _params: &RadialShadingParams)

Paint a radial gradient shading.

fn paint_mesh_shading(&mut self, _params: &MeshShadingParams)

Paint a Gouraud-shaded triangle mesh.

fn paint_patch_shading(&mut self, _params: &PatchShadingParams)

Paint a Coons/tensor-product patch mesh.

fn paint_pattern_fill(&mut self, _params: &PatternFillParams)

Paint a tiled pattern fill.

fn set_trim_box(&mut self, _llx: f64, _lly: f64, _urx: f64, _ury: f64)

Set the trim box for the next page (PDF points, lower-left origin). Only meaningful for PDF output; other devices ignore this.

fn replay_and_show( &mut self, list: DisplayList, output_path: &str, ) -> Result<(), String>

Replay a display list and write output in one step.

fn finish(&mut self) -> Result<(), String>

Wait for any pending background render to complete.

fn finish_with_context(&mut self, _ctx: &Context) -> Result<(), String>

Called after interpretation finishes, with access to the interpreter context.

fn as_any(&self) -> &dyn Any

Downcast to a concrete type. Override in implementations that need to be accessed after rendering (e.g., PdfDevice for in-memory output).