Struct lodepng::ffi::State

#[repr(C)]
pub struct State {
    pub decoder: DecoderSettings,
    pub encoder: EncoderSettings,
    pub info_raw: ColorMode,
    pub info_png: Info,
    pub error: Error,
}

The settings, state and information for extended encoding and decoding

Fields

decoder: DecoderSettings

encoder: EncoderSettings

info_raw: ColorMode

specifies the format in which you would like to get the raw pixel buffer

info_png: Info

info of the PNG image obtained after decoding

error: Error

Methods

impl State

fn new() -> Self

fn set_auto_convert(&mut self, mode: bool)

fn set_filter_strategy(
    &mut self,
    mode: FilterStrategy,
    palette_filter_zero: bool
)

unsafe fn set_custom_zlib(
    &mut self,
    callback: custom_compress_callback,
    context: *const c_void
)

unsafe fn set_custom_deflate(
    &mut self,
    callback: custom_compress_callback,
    context: *const c_void
)

fn info_raw(&self) -> &ColorMode

fn info_raw_mut(&mut self) -> &mut ColorMode

fn info_png(&self) -> &Info

fn info_png_mut(&mut self) -> &mut Info

fn color_convert(&mut self, true_or_false: bool)

whether to convert the PNG to the color type you want. Default: yes

fn read_text_chunks(&mut self, true_or_false: bool)

if false but remember_unknown_chunks is true, they're stored in the unknown chunks.

fn remember_unknown_chunks(&mut self, true_or_false: bool)

store all bytes from unknown chunks in the Info (off by default, useful for a png editor)

fn get_icc(&self) -> Result<Vec<u8>, Error>

Decompress ICC profile from iCCP chunk

fn decode<Bytes: AsRef<[u8]>>(&mut self, input: Bytes) -> Result<Image, Error>

Load PNG from buffer using State's settings

 state.info_raw_mut().colortype = ColorType::RGBA;
 match state.decode(&slice) {
     Ok(Image::RGBA(with_alpha)) => do_stuff(with_alpha),
     _ => panic!("¯\\_(ツ)_/¯")
 }

fn decode_file<P: AsRef<Path>>(&mut self, filepath: P) -> Result<Image, Error>

fn inspect(&mut self, input: &[u8]) -> Result<(usize, usize), Error>

Returns (width, height)

fn encode<PixelType: Copy>(
    &mut self,
    image: &[PixelType],
    w: usize,
    h: usize
) -> Result<Vec<u8>, Error>

fn encode_file<PixelType: Copy, P: AsRef<Path>>(
    &mut self,
    filepath: P,
    image: &[PixelType],
    w: usize,
    h: usize
) -> Result<(), Error>

Trait Implementations

impl Clone for State

fn clone(&self) -> State

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for State

fn default() -> Self

Returns the "default value" for a type.