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< title > qrcode::QrCode - Rust< / title >
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< p class = 'location' > < a href = 'index.html' > qrcode< / a > < / p > < script > window . sidebarCurrent = { name : 'QrCode' , ty : 'struct' , relpath : '' } ; < / script > < script defer src = "sidebar-items.js" > < / script >
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< h1 class = 'fqn' > < span class = 'in-band' > Struct < a href = 'index.html' > qrcode< / a > ::< wbr > < a class = 'struct' href = '' > QrCode< / a > < / span > < span class = 'out-of-band' > < span id = 'render-detail' >
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< / span > < a id = 'src-1132' class = 'srclink' href = '../src/qrcode/src/lib.rs.html#48-53' title = 'goto source code' > [src]< / a > < / span > < / h1 >
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< pre class = 'rust struct' > pub struct QrCode {
// some fields omitted
}< / pre > < div class = 'docblock' > < p > The encoded QR code symbol.< / p >
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< / div > < h2 id = 'methods' > Methods< / h2 > < h3 class = 'impl' > < span class = 'in-band' > < code > impl < a class = 'struct' href = '../qrcode/struct.QrCode.html' title = 'qrcode::QrCode' > QrCode< / a > < / code > < / span > < span class = 'out-of-band' > < div class = 'ghost' > < / div > < a id = 'src-1144' class = 'srclink' href = '../src/qrcode/src/lib.rs.html#55-227' title = 'goto source code' > [src]< / a > < / span > < / h3 >
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< div class = 'impl-items' > < h4 id = 'method.new' class = 'method' > < code > fn < a href = '#method.new' class = 'fnname' > new< / a > < D: < a class = 'trait' href = 'https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html' title = 'core::convert::AsRef' > AsRef< / a > < < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.slice.html' > [< / a > < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.u8.html' > u8< / a > < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.slice.html' > ]< / a > > > (data: D) -> < a class = 'type' href = '../qrcode/types/type.QrResult.html' title = 'qrcode::types::QrResult' > QrResult< / a > < < a class = 'struct' href = '../qrcode/struct.QrCode.html' title = 'qrcode::QrCode' > QrCode< / a > > < / code > < / h4 >
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< div class = 'docblock' > < p > Constructs a new QR code which automatically encodes the given data.< / p >
< p > This method uses the " medium" error correction level and automatically
chooses the smallest QR code.< / p >
< pre class = 'rust rust-example-rendered' >
< span class = 'kw' > use< / span > < span class = 'ident' > qrcode< / span > ::< span class = 'ident' > QrCode< / span > ;
< span class = 'kw' > let< / span > < span class = 'ident' > code< / span > < span class = 'op' > =< / span > < span class = 'ident' > QrCode< / span > ::< span class = 'ident' > new< / span > (< span class = 'string' > b" Some data" < / span > ).< span class = 'ident' > unwrap< / span > ();< / pre >
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< / div > < h4 id = 'method.with_error_correction_level' class = 'method' > < code > fn < a href = '#method.with_error_correction_level' class = 'fnname' > with_error_correction_level< / a > < D: < a class = 'trait' href = 'https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html' title = 'core::convert::AsRef' > AsRef< / a > < < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.slice.html' > [< / a > < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.u8.html' > u8< / a > < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.slice.html' > ]< / a > > > (data: D, ec_level: < a class = 'enum' href = '../qrcode/types/enum.EcLevel.html' title = 'qrcode::types::EcLevel' > EcLevel< / a > ) -> < a class = 'type' href = '../qrcode/types/type.QrResult.html' title = 'qrcode::types::QrResult' > QrResult< / a > < < a class = 'struct' href = '../qrcode/struct.QrCode.html' title = 'qrcode::QrCode' > QrCode< / a > > < / code > < / h4 >
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< div class = 'docblock' > < p > Constructs a new QR code which automatically encodes the given data at a
specific error correction level.< / p >
< p > This method automatically chooses the smallest QR code.< / p >
< pre class = 'rust rust-example-rendered' >
< span class = 'kw' > use< / span > < span class = 'ident' > qrcode< / span > ::{< span class = 'ident' > QrCode< / span > , < span class = 'ident' > EcLevel< / span > };
< span class = 'kw' > let< / span > < span class = 'ident' > code< / span > < span class = 'op' > =< / span > < span class = 'ident' > QrCode< / span > ::< span class = 'ident' > with_error_correction_level< / span > (< span class = 'string' > b" Some data" < / span > , < span class = 'ident' > EcLevel< / span > ::< span class = 'ident' > H< / span > ).< span class = 'ident' > unwrap< / span > ();< / pre >
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< / div > < h4 id = 'method.with_version' class = 'method' > < code > fn < a href = '#method.with_version' class = 'fnname' > with_version< / a > < D: < a class = 'trait' href = 'https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html' title = 'core::convert::AsRef' > AsRef< / a > < < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.slice.html' > [< / a > < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.u8.html' > u8< / a > < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.slice.html' > ]< / a > > > (data: D, version: < a class = 'enum' href = '../qrcode/types/enum.Version.html' title = 'qrcode::types::Version' > Version< / a > , ec_level: < a class = 'enum' href = '../qrcode/types/enum.EcLevel.html' title = 'qrcode::types::EcLevel' > EcLevel< / a > ) -> < a class = 'type' href = '../qrcode/types/type.QrResult.html' title = 'qrcode::types::QrResult' > QrResult< / a > < < a class = 'struct' href = '../qrcode/struct.QrCode.html' title = 'qrcode::QrCode' > QrCode< / a > > < / code > < / h4 >
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< div class = 'docblock' > < p > Constructs a new QR code for the given version and error correction
level.< / p >
< pre class = 'rust rust-example-rendered' >
< span class = 'kw' > use< / span > < span class = 'ident' > qrcode< / span > ::{< span class = 'ident' > QrCode< / span > , < span class = 'ident' > Version< / span > , < span class = 'ident' > EcLevel< / span > };
< span class = 'kw' > let< / span > < span class = 'ident' > code< / span > < span class = 'op' > =< / span > < span class = 'ident' > QrCode< / span > ::< span class = 'ident' > with_version< / span > (< span class = 'string' > b" Some data" < / span > , < span class = 'ident' > Version< / span > ::< span class = 'ident' > Normal< / span > (< span class = 'number' > 5< / span > ), < span class = 'ident' > EcLevel< / span > ::< span class = 'ident' > M< / span > ).< span class = 'ident' > unwrap< / span > ();< / pre >
< p > This method can also be used to generate Micro QR code.< / p >
< pre class = 'rust rust-example-rendered' >
< span class = 'kw' > use< / span > < span class = 'ident' > qrcode< / span > ::{< span class = 'ident' > QrCode< / span > , < span class = 'ident' > Version< / span > , < span class = 'ident' > EcLevel< / span > };
< span class = 'kw' > let< / span > < span class = 'ident' > micro_code< / span > < span class = 'op' > =< / span > < span class = 'ident' > QrCode< / span > ::< span class = 'ident' > with_version< / span > (< span class = 'string' > b" 123" < / span > , < span class = 'ident' > Version< / span > ::< span class = 'ident' > Micro< / span > (< span class = 'number' > 1< / span > ), < span class = 'ident' > EcLevel< / span > ::< span class = 'ident' > L< / span > ).< span class = 'ident' > unwrap< / span > ();< / pre >
< / div > < h4 id = 'method.with_bits' class = 'method' > < code > fn < a href = '#method.with_bits' class = 'fnname' > with_bits< / a > (bits: < a class = 'struct' href = '../qrcode/bits/struct.Bits.html' title = 'qrcode::bits::Bits' > Bits< / a > , ec_level: < a class = 'enum' href = '../qrcode/types/enum.EcLevel.html' title = 'qrcode::types::EcLevel' > EcLevel< / a > ) -> < a class = 'type' href = '../qrcode/types/type.QrResult.html' title = 'qrcode::types::QrResult' > QrResult< / a > < < a class = 'struct' href = '../qrcode/struct.QrCode.html' title = 'qrcode::QrCode' > QrCode< / a > > < / code > < / h4 >
< div class = 'docblock' > < p > Constructs a new QR code with encoded bits.< / p >
< p > Use this method only if there are very special need to manipulate the
raw bits before encoding. Some examples are:< / p >
< ul >
< li > Encode data using specific character set with ECI< / li >
< li > Use the FNC1 modes< / li >
< li > Avoid the optimal segmentation algorithm< / li >
< / ul >
< p > See the < code > Bits< / code > structure for detail.< / p >
< pre class = 'rust rust-example-rendered' >
< span class = 'attribute' > #< span class = 'op' > !< / span > [< span class = 'ident' > allow< / span > (< span class = 'ident' > unused_must_use< / span > )]< / span >
< span class = 'kw' > use< / span > < span class = 'ident' > qrcode< / span > ::{< span class = 'ident' > QrCode< / span > , < span class = 'ident' > Version< / span > , < span class = 'ident' > EcLevel< / span > };
< span class = 'kw' > use< / span > < span class = 'ident' > qrcode< / span > ::< span class = 'ident' > bits< / span > ::< span class = 'ident' > Bits< / span > ;
< span class = 'kw' > let< / span > < span class = 'kw-2' > mut< / span > < span class = 'ident' > bits< / span > < span class = 'op' > =< / span > < span class = 'ident' > Bits< / span > ::< span class = 'ident' > new< / span > (< span class = 'ident' > Version< / span > ::< span class = 'ident' > Normal< / span > (< span class = 'number' > 1< / span > ));
< span class = 'ident' > bits< / span > .< span class = 'ident' > push_eci_designator< / span > (< span class = 'number' > 9< / span > );
< span class = 'ident' > bits< / span > .< span class = 'ident' > push_byte_data< / span > (< span class = 'string' > b" \xca\xfe\xe4\xe9\xea\xe1\xf2 QR" < / span > );
< span class = 'ident' > bits< / span > .< span class = 'ident' > push_terminator< / span > (< span class = 'ident' > EcLevel< / span > ::< span class = 'ident' > L< / span > );
< span class = 'kw' > let< / span > < span class = 'ident' > qrcode< / span > < span class = 'op' > =< / span > < span class = 'ident' > QrCode< / span > ::< span class = 'ident' > with_bits< / span > (< span class = 'ident' > bits< / span > , < span class = 'ident' > EcLevel< / span > ::< span class = 'ident' > L< / span > );< / pre >
< / div > < h4 id = 'method.version' class = 'method' > < code > fn < a href = '#method.version' class = 'fnname' > version< / a > (& self) -> < a class = 'enum' href = '../qrcode/types/enum.Version.html' title = 'qrcode::types::Version' > Version< / a > < / code > < / h4 >
< div class = 'docblock' > < p > Gets the version of this QR code.< / p >
< / div > < h4 id = 'method.error_correction_level' class = 'method' > < code > fn < a href = '#method.error_correction_level' class = 'fnname' > error_correction_level< / a > (& self) -> < a class = 'enum' href = '../qrcode/types/enum.EcLevel.html' title = 'qrcode::types::EcLevel' > EcLevel< / a > < / code > < / h4 >
< div class = 'docblock' > < p > Gets the error correction level of this QR code.< / p >
< / div > < h4 id = 'method.width' class = 'method' > < code > fn < a href = '#method.width' class = 'fnname' > width< / a > (& self) -> < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.usize.html' > usize< / a > < / code > < / h4 >
< div class = 'docblock' > < p > Gets the number of modules per side, i.e. the width of this QR code.< / p >
< p > The width here does not contain the quiet zone paddings.< / p >
< / div > < h4 id = 'method.max_allowed_errors' class = 'method' > < code > fn < a href = '#method.max_allowed_errors' class = 'fnname' > max_allowed_errors< / a > (& self) -> < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.usize.html' > usize< / a > < / code > < / h4 >
< div class = 'docblock' > < p > Gets the maximum number of allowed erratic modules can be introduced
before the data becomes corrupted. Note that errors should not be
introduced to functional modules.< / p >
< / div > < h4 id = 'method.is_functional' class = 'method' > < code > fn < a href = '#method.is_functional' class = 'fnname' > is_functional< / a > (& self, x: < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.usize.html' > usize< / a > , y: < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.usize.html' > usize< / a > ) -> < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.bool.html' > bool< / a > < / code > < / h4 >
< div class = 'docblock' > < p > Checks whether a module at coordinate (x, y) is a functional module or
not.< / p >
< / div > < h4 id = 'method.to_debug_str' class = 'method' > < code > fn < a href = '#method.to_debug_str' class = 'fnname' > to_debug_str< / a > (& self, on_char: < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.char.html' > char< / a > , off_char: < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.char.html' > char< / a > ) -> < a class = 'struct' href = 'https://doc.rust-lang.org/nightly/collections/string/struct.String.html' title = 'collections::string::String' > String< / a > < / code > < / h4 >
< div class = 'docblock' > < p > Converts the QR code into a human-readable string. This is mainly for
debugging only.< / p >
< / div > < h4 id = 'method.to_vec' class = 'method' > < code > fn < a href = '#method.to_vec' class = 'fnname' > to_vec< / a > (& self) -> < a class = 'struct' href = 'https://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html' title = 'collections::vec::Vec' > Vec< / a > < < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.bool.html' > bool< / a > > < / code > < / h4 >
< div class = 'docblock' > < p > Converts the QR code to a vector of booleans. Each entry represents the
color of the module, with " true" means dark and " false" means light.< / p >
< / div > < h4 id = 'method.into_vec' class = 'method' > < code > fn < a href = '#method.into_vec' class = 'fnname' > into_vec< / a > (self) -> < a class = 'struct' href = 'https://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html' title = 'collections::vec::Vec' > Vec< / a > < < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.bool.html' > bool< / a > > < / code > < / h4 >
< div class = 'docblock' > < p > Converts the QR code to a vector of booleans. Each entry represents the
color of the module, with " true" means dark and " false" means light.< / p >
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< / div > < h4 id = 'method.render' class = 'method' > < code > fn < a href = '#method.render' class = 'fnname' > render< / a > < P: < a class = 'trait' href = '../qrcode/render/trait.BlankAndWhitePixel.html' title = 'qrcode::render::BlankAndWhitePixel' > BlankAndWhitePixel< / a > + 'static> (& self) -> < a class = 'struct' href = '../qrcode/render/struct.Renderer.html' title = 'qrcode::render::Renderer' > Renderer< / a > < P> < / code > < / h4 >
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< div class = 'docblock' > < p > Renders the QR code into an image. The result is an image builder, which
you may do some additional configuration before copying it into a
concrete image.< / p >
< h1 id = 'examples' class = 'section-header' > < a href = '#examples' > Examples< / a > < / h1 >
< pre class = 'rust rust-example-rendered' >
< span class = 'kw' > let< / span > < span class = 'ident' > image< / span > < span class = 'op' > =< / span > < span class = 'ident' > QrCode< / span > ::< span class = 'ident' > new< / span > (< span class = 'string' > b" hello" < / span > ).< span class = 'ident' > unwrap< / span > ()
.< span class = 'ident' > render< / span > ()
.< span class = 'ident' > dark_color< / span > (< span class = 'ident' > Rgb< / span > { < span class = 'ident' > data< / span > : [< span class = 'number' > 0< / span > , < span class = 'number' > 0< / span > , < span class = 'number' > 128< / span > ] })
.< span class = 'ident' > light_color< / span > (< span class = 'ident' > Rgb< / span > { < span class = 'ident' > data< / span > : [< span class = 'number' > 224< / span > , < span class = 'number' > 224< / span > , < span class = 'number' > 224< / span > ] }) < span class = 'comment' > // adjust colors< / span >
.< span class = 'ident' > quiet_zone< / span > (< span class = 'boolvalue' > false< / span > ) < span class = 'comment' > // disable quiet zone (white border)< / span >
.< span class = 'ident' > min_width< / span > (< span class = 'number' > 300< / span > ) < span class = 'comment' > // sets minimum image size< / span >
.< span class = 'ident' > to_image< / span > ();< / pre >
< p > Note: the < code > image< / code > crate itself also provides method to rotate the image,
or overlay a logo on top of the QR code.< / p >
< / div > < / div > < h2 id = 'implementations' > Trait Implementations< / h2 > < h3 class = 'impl' > < span class = 'in-band' > < code > impl < a class = 'trait' href = 'https://doc.rust-lang.org/nightly/core/ops/trait.Index.html' title = 'core::ops::Index' > Index< / a > < < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.tuple.html' > (< / a > < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.usize.html' > usize< / a > , < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.usize.html' > usize< / a > < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.tuple.html' > )< / a > > for < a class = 'struct' href = '../qrcode/struct.QrCode.html' title = 'qrcode::QrCode' > QrCode< / a > < / code > < / span > < span class = 'out-of-band' > < div class = 'ghost' > < / div > < a id = 'src-1203' class = 'srclink' href = '../src/qrcode/src/lib.rs.html#229-236' title = 'goto source code' > [src]< / a > < / span > < / h3 >
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< div class = 'impl-items' > < h4 id = 'associatedtype.Output' class = 'type' > < code > type < a href = 'https://doc.rust-lang.org/nightly/core/ops/trait.Index.html#associatedtype.Output' class = 'type' > Output< / a > = < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.bool.html' > bool< / a > < / code > < / h4 >
< div class = 'docblock' > < p > The returned type after indexing< / p >
< / div > < h4 id = 'method.index' class = 'method' > < code > fn < a href = 'https://doc.rust-lang.org/nightly/core/ops/trait.Index.html#tymethod.index' class = 'fnname' > index< / a > (& self, (x, y): < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.tuple.html' > (< / a > < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.usize.html' > usize< / a > , < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.usize.html' > usize< / a > < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.tuple.html' > )< / a > ) -> & < a class = 'primitive' href = 'https://doc.rust-lang.org/nightly/std/primitive.bool.html' > bool< / a > < / code > < / h4 >
< div class = 'docblock' > < p > The method for the indexing (< code > Foo[Bar]< / code > ) operation< / p >
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< / div > < / div > < h3 id = 'derived_implementations' > Derived Implementations < / h3 > < h3 class = 'impl' > < span class = 'in-band' > < code > impl < a class = 'trait' href = 'https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html' title = 'core::clone::Clone' > Clone< / a > for < a class = 'struct' href = '../qrcode/struct.QrCode.html' title = 'qrcode::QrCode' > QrCode< / a > < / code > < / span > < span class = 'out-of-band' > < div class = 'ghost' > < / div > < a id = 'src-1137' class = 'srclink' href = '../src/qrcode/src/lib.rs.html#47' title = 'goto source code' > [src]< / a > < / span > < / h3 >
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< div class = 'impl-items' > < h4 id = 'method.clone' class = 'method' > < code > fn < a href = 'https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone' class = 'fnname' > clone< / a > (& self) -> < a class = 'struct' href = '../qrcode/struct.QrCode.html' title = 'qrcode::QrCode' > QrCode< / a > < / code > < / h4 >
< div class = 'docblock' > < p > Returns a copy of the value. < a href = "https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone" > Read more< / a > < / p >
< / div > < h4 id = 'method.clone_from' class = 'method' > < code > fn < a href = 'https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from' class = 'fnname' > clone_from< / a > (& mut self, source: & Self)< / code > < div class = 'since' title = 'Stable since Rust version 1.0.0' > 1.0.0< / div > < / h4 >
< div class = 'docblock' > < p > Performs copy-assignment from < code > source< / code > . < a href = "https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from" > Read more< / a > < / p >
< / div > < / div > < / section >
< section id = 'search' class = "content hidden" > < / section >
< section class = "footer" > < / section >
< aside id = "help" class = "hidden" >
< div >
< h1 class = "hidden" > Help< / h1 >
< div class = "shortcuts" >
< h2 > Keyboard Shortcuts< / h2 >
< dl >
< dt > ?< / dt >
< dd > Show this help dialog< / dd >
< dt > S< / dt >
< dd > Focus the search field< / dd >
< dt > ⇤ < / dt >
< dd > Move up in search results< / dd >
< dt > ⇥ < / dt >
< dd > Move down in search results< / dd >
< dt > ⏎ < / dt >
< dd > Go to active search result< / dd >
< dt > +< / dt >
< dd > Collapse/expand all sections< / dd >
< / dl >
< / div >
< div class = "infos" >
< h2 > Search Tricks< / h2 >
< p >
Prefix searches with a type followed by a colon (e.g.
< code > fn:< / code > ) to restrict the search to a given type.
< / p >
< p >
Accepted types are: < code > fn< / code > , < code > mod< / code > ,
< code > struct< / code > , < code > enum< / code > ,
< code > trait< / code > , < code > type< / code > , < code > macro< / code > ,
and < code > const< / code > .
< / p >
< p >
Search functions by type signature (e.g.
< code > vec -> usize< / code > or < code > * -> vec< / code > )
< / p >
< / div >
< / div >
< / aside >
< script >
window.rootPath = "../";
window.currentCrate = "qrcode";
window.playgroundUrl = "";
< / script >
< script src = "../jquery.js" > < / script >
< script src = "../main.js" > < / script >
< script defer src = "../search-index.js" > < / script >
< / body >
< / html >
