Enum ImwritePNGFilterFlags 

#[repr(i32)]
pub enum ImwritePNGFilterFlags {
    IMWRITE_PNG_FILTER_NONE = 8,
    IMWRITE_PNG_FILTER_SUB = 16,
    IMWRITE_PNG_FILTER_UP = 32,
    IMWRITE_PNG_FILTER_AVG = 64,
    IMWRITE_PNG_FILTER_PAETH = 128,
    IMWRITE_PNG_FAST_FILTERS = 56,
    IMWRITE_PNG_ALL_FILTERS = 248,
}

Imwrite PNG specific values for IMWRITE_PNG_FILTER parameter key

Variants

IMWRITE_PNG_FILTER_NONE = 8

Applies no filter to the PNG image (useful when you want to save the raw pixel data without any compression filter).

IMWRITE_PNG_FILTER_SUB = 16

Applies the “sub” filter, which calculates the difference between the current byte and the previous byte in the row.

IMWRITE_PNG_FILTER_UP = 32

applies the “up” filter, which calculates the difference between the current byte and the corresponding byte directly above it.

IMWRITE_PNG_FILTER_AVG = 64

applies the “average” filter, which calculates the average of the byte to the left and the byte above.

IMWRITE_PNG_FILTER_PAETH = 128

applies the “Paeth” filter, a more complex filter that predicts the next pixel value based on neighboring pixels.

IMWRITE_PNG_FAST_FILTERS = 56

This is a combination of IMWRITE_PNG_FILTER_NONE, IMWRITE_PNG_FILTER_SUB, and IMWRITE_PNG_FILTER_UP, typically used for faster compression.

IMWRITE_PNG_ALL_FILTERS = 248

This combines all available filters (NONE, SUB, UP, AVG, and PAETH), which will attempt to apply all of them for the best possible compression.

Trait Implementations

impl Clone for ImwritePNGFilterFlags

fn clone(&self) -> ImwritePNGFilterFlags

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ImwritePNGFilterFlags

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

Formats the value using the given formatter.

impl From<ImwritePNGFilterFlags> for i32

fn from(v: ImwritePNGFilterFlags) -> Self

Converts to this type from the input type.

impl PartialEq for ImwritePNGFilterFlags

fn eq(&self, other: &ImwritePNGFilterFlags) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryFrom<i32> for ImwritePNGFilterFlags

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: i32) -> Result<Self, Self::Error>

Performs the conversion.

impl Copy for ImwritePNGFilterFlags

impl Eq for ImwritePNGFilterFlags

impl StructuralPartialEq for ImwritePNGFilterFlags