Struct png::Transformations [−][src]
pub struct Transformations { /* fields omitted */ }
Expand description
Output transformations
Many flags from libpng are not yet supported. A PR discussing/adding them would be nice.
/// Discard the alpha channel
const STRIP_ALPHA = 0x0002; // read only
/// Expand 1; 2 and 4-bit samples to bytes
const PACKING = 0x0004; // read and write
/// Change order of packed pixels to LSB first
const PACKSWAP = 0x0008; // read and write
/// Invert monochrome images
const INVERT_MONO = 0x0020; // read and write
/// Normalize pixels to the sBIT depth
const SHIFT = 0x0040; // read and write
/// Flip RGB to BGR; RGBA to BGRA
const BGR = 0x0080; // read and write
/// Flip RGBA to ARGB or GA to AG
const SWAP_ALPHA = 0x0100; // read and write
/// Byte-swap 16-bit samples
const SWAP_ENDIAN = 0x0200; // read and write
/// Change alpha from opacity to transparency
const INVERT_ALPHA = 0x0400; // read and write
const STRIP_FILLER = 0x0800; // write only
const STRIP_FILLER_BEFORE = 0x0800; // write only
const STRIP_FILLER_AFTER = 0x1000; // write only
const GRAY_TO_RGB = 0x2000; // read only
const EXPAND_16 = 0x4000; // read only
/// Similar to STRIP_16 but in libpng considering gamma?
/// Not entirely sure the documentation says it is more
/// accurate but doesn't say precisely how.
const SCALE_16 = 0x8000; // read only
Implementations
No transformation
Strip 16-bit samples to 8 bits
Expand paletted images to RGB; expand grayscale images of less than 8-bit depth to 8-bit depth; and expand tRNS chunks to alpha channels.
Returns an empty set of flags
Returns the set containing all flags.
Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.
Convert from underlying bit representation, dropping any bits that do not correspond to flags.
Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).
Returns true
if there are flags common to both self
and other
.
Returns true
all of the flags in other
are contained within self
.
Inserts the specified flags in-place.
Removes the specified flags in-place.
Toggles the specified flags in-place.
Inserts or removes the specified flags depending on the passed value.
Transform every input to 8bit grayscale or color.
This sets EXPAND
and STRIP_16
which is similar to the default transformation used by
this library prior to 0.17
.
Trait Implementations
Returns the intersection between the two sets of flags.
type Output = Transformations
type Output = Transformations
The resulting type after applying the &
operator.
Disables all flags disabled in the set.
Returns the union of the two sets of flags.
type Output = Transformations
type Output = Transformations
The resulting type after applying the |
operator.
Adds the set of flags.
Returns the left flags, but with all the right flags toggled.
type Output = Transformations
type Output = Transformations
The resulting type after applying the ^
operator.
Toggles the set of flags.
Instantiate the default transformations, the identity transform.
Returns the “default value” for a type. Read more
Extends a collection with the contents of an iterator. Read more
extend_one
)Extends a collection with exactly one element.
extend_one
)Reserves capacity in a collection for the given number of additional elements. Read more
Creates a value from an iterator. Read more
Returns the complement of this set of flags.
type Output = Transformations
type Output = Transformations
The resulting type after applying the !
operator.
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
This method returns an ordering between self
and other
values if one exists. Read more
This method tests less than (for self
and other
) and is used by the <
operator. Read more
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
Returns the set difference of the two sets of flags.
type Output = Transformations
type Output = Transformations
The resulting type after applying the -
operator.
Disables all flags enabled in the set.
Auto Trait Implementations
impl RefUnwindSafe for Transformations
impl Send for Transformations
impl Sync for Transformations
impl Unpin for Transformations
impl UnwindSafe for Transformations
Blanket Implementations
Mutably borrows from an owned value. Read more