Struct rxing::PlanarYUVLuminanceSource

pub struct PlanarYUVLuminanceSource { /* private fields */ }

This object extends LuminanceSource around an array of YUV data returned from the camera driver, with the option to crop to a rectangle within the full data. This can be used to exclude superfluous pixels around the perimeter and speed up decoding.

It works for any pixel format where the Y channel is planar and appears first, including YCbCr_420_SP and YCbCr_422_SP.

@author dswitkin@google.com (Daniel Switkin)

Implementations

impl PlanarYUVLuminanceSource

pub fn new_with_all(
    yuv_data: Vec<u8>,
    data_width: usize,
    data_height: usize,
    left: usize,
    top: usize,
    width: usize,
    height: usize,
    reverse_horizontal: bool,
    inverted: bool
) -> Result<Self, Exceptions>

pub fn renderThumbnail(&self) -> Vec<u8>

pub fn getThumbnailWidth(&self) -> usize

@return width of image from {@link #renderThumbnail()}

pub fn getThumbnailHeight(&self) -> usize

@return height of image from {@link #renderThumbnail()}

Trait Implementations

impl Clone for PlanarYUVLuminanceSource

fn clone(&self) -> PlanarYUVLuminanceSource

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PlanarYUVLuminanceSource

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

Formats the value using the given formatter.

impl LuminanceSource for PlanarYUVLuminanceSource

fn getRow(&self, y: usize) -> Vec<u8>

Fetches one row of luminance data from the underlying platform’s bitmap. Values range from 0 (black) to 255 (white). Because Java does not have an unsigned byte type, callers will have to bitwise and with 0xff for each value. It is preferable for implementations of this method to only fetch this row rather than the whole image, since no 2D Readers may be installed and getMatrix() may never be called.

fn getMatrix(&self) -> Vec<u8>

Fetches luminance data for the underlying bitmap. Values should be fetched using: {@code int luminance = array[y * width + x] & 0xff}

fn getWidth(&self) -> usize

@return The width of the bitmap.

fn getHeight(&self) -> usize

@return The height of the bitmap.

fn isCropSupported(&self) -> bool

@return Whether this subclass supports cropping.

fn crop(
    &self,
    left: usize,
    top: usize,
    width: usize,
    height: usize
) -> Result<Box<dyn LuminanceSource>, Exceptions>

Returns a new object with cropped image data. Implementations may keep a reference to the original data rather than a copy. Only callable if isCropSupported() is true.

fn isRotateSupported(&self) -> bool

@return Whether this subclass supports counter-clockwise rotation.

fn invert(&mut self)

@return a wrapper of this {@code LuminanceSource} which inverts the luminances it returns – black becomes white and vice versa, and each value becomes (255-value).

fn rotateCounterClockwise(&self) -> Result<Box<dyn LuminanceSource>, Exceptions>

Returns a new object with rotated image data by 90 degrees counterclockwise. Only callable if {@link #isRotateSupported()} is true.

fn rotateCounterClockwise45(
    &self
) -> Result<Box<dyn LuminanceSource>, Exceptions>

Returns a new object with rotated image data by 45 degrees counterclockwise. Only callable if {@link #isRotateSupported()} is true.

fn invert_block_of_bytes(&self, vec_to_invert: Vec<u8>) -> Vec<u8>