Struct EpsonPrinterGfx 

pub struct EpsonPrinterGfx { /* private fields */ }

A simple EPSON printer graphics data interceptor that can produce images via DotMatrixGfx trait.

Use its EpsonPrinterGfx::intercept method to filter data being sent to the printer.

Note

This is a very simple implementation, which in reality is able to catch only the output of COPY and COPY EXP commands found in Spectrum’s ROMs: 128k, +2, and +3.

Implementations

impl EpsonPrinterGfx

pub fn intercept<'a, 'b: 'a>(&'a mut self, ch: &'b u8) -> Option<&'a [u8]>

Returns a reference to the byte sent to the printer or captures it if an escape code arrives.

In this instance all subsequent writes are being buffered until one of two things happens:

• Either a collected escape sequence matches the signature of graphic data being sent to the printer. In this instance, the image is being spooled and will be available via DotMatrixGfx methods.
• Or a collected escape sequence data does not match the signature. In this instance, a reference to the buffered data is being returned so it can be passed back to the upstream.

Trait Implementations

impl Clone for EpsonPrinterGfx

fn clone(&self) -> EpsonPrinterGfx

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for EpsonPrinterGfx

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

Formats the value using the given formatter.

impl Default for EpsonPrinterGfx

fn default() -> EpsonPrinterGfx

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for EpsonPrinterGfx

where EpsonPrinterGfx: Default,

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl DotMatrixGfx for EpsonPrinterGfx

fn is_spooling(&self) -> bool

Returns true if the printer is currently capturing data. Returns false otherwise.

fn lines_buffered(&self) -> usize

Returns an approximate number of graphic lines already buffered.

fn clear(&mut self)

Clears the buffered image data.

fn write_svg_dot_gfx_lines( &self, description: &str, target: &mut dyn Write, ) -> Result<bool>

Renders already buffered image data as an SVG image written to the provided target. Returns Ok(true) if an image has been rendered. If there was no image data spooled, returns Ok(false).

fn write_gfx_data(&mut self, _target: &mut Vec<u8>) -> Option<(u32, u32)>

Renders already buffered image data as a monochrome 8-bit greyscale image data. Returns Some(width, height) if an image has been rendered. If there was no image data spooled, returns None.

fn is_empty(&self) -> bool

Returns true if no image has been buffered. Otherwise returns false

impl Serialize for EpsonPrinterGfx

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.