Struct image::png::PNGDecoder
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[src]
pub struct PNGDecoder<R> { // some fields omitted }
The representation of a PNG decoder
Currently does not support decoding of interlaced images
Methods
impl<R: Read> PNGDecoder<R>
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fn new(r: R) -> PNGDecoder<R>
Create a new decoder that decodes from the stream r
fn palette<'a>(&'a self) -> &'a [(u8, u8, u8)]
Returns a reference to the color palette used for indexed color images. Each array element is a tuple of RGB values.
Trait Implementations
impl<R: Read> ImageDecoder for PNGDecoder<R>
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fn dimensions(&mut self) -> ImageResult<(u32, u32)>
Returns a tuple containing the width and height of the image
fn colortype(&mut self) -> ImageResult<ColorType>
Returns the color type of the image e.g RGB(8) (8bit RGB)
fn row_len(&mut self) -> ImageResult<usize>
Returns the length in bytes of one decoded row of the image
fn read_scanline(&mut self, buf: &mut [u8]) -> ImageResult<u32>
Reads one row from the image into buf and returns the row index
fn read_image(&mut self) -> ImageResult<DecodingResult>
Decodes the entire image and return it as a Vector
fn is_animated(&mut self) -> ImageResult<bool>
Returns true if the image is animated
fn into_frames(self) -> ImageResult<Frames>
Returns the frames of the image If the image is not animated it returns a single frame Read more
fn load_rect(&mut self, x: u32, y: u32, length: u32, width: u32) -> ImageResult<Vec<u8>>
Decodes a specific region of the image, represented by the rectangle starting from x
and y
and having length
and width
Read more