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@ -27,18 +27,21 @@
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/// A QR Code symbol, which is a type of two-dimension barcode.
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///
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/// Invented by Denso Wave and described in the ISO/IEC 18004 standard.
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///
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/// Instances of this struct represent an immutable square grid of black and white cells.
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/// The impl provides static factory functions to create a QR Code from text or binary data.
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/// The struct and impl cover the QR Code Model 2 specification, supporting all versions
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/// (sizes) from 1 to 40, all 4 error correction levels, and 4 character encoding modes.
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///
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/// Ways to create a QR Code object:
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///
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/// - High level: Take the payload data and call QrCode::encode_text() or QrCode::encode_binary().
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/// - Mid level: Custom-make the list of segments and call
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/// QrCode.encode_segments() or QrCode.encode_segments_advanced().
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/// - Low level: Custom-make the array of data codeword bytes (including segment
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/// headers and final padding, excluding error correction codewords), supply the
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/// appropriate version number, and call the QrCode::encode_codewords() constructor.
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///
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/// (Note that all ways require supplying the desired error correction level.)
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#[derive(Clone)]
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pub struct QrCode {
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@ -109,6 +112,7 @@ impl QrCode {
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///
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/// The smallest possible QR Code version is automatically chosen for the output. The ECC level
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/// of the result may be higher than the ecl argument if it can be done without increasing the version.
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///
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/// This function allows the user to create a custom sequence of segments that switches
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/// between modes (such as alphanumeric and byte) to encode text in less space.
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/// This is a mid-level API; the high-level API is encode_text() and encode_binary().
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@ -125,6 +129,7 @@ impl QrCode {
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/// may be higher than the ecl argument if it can be done without increasing the
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/// version. The mask number is either between 0 to 7 (inclusive) to force that
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/// mask, or -1 to automatically choose an appropriate mask (which may be slow).
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///
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/// This function allows the user to create a custom sequence of segments that switches
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/// between modes (such as alphanumeric and byte) to encode text in less space.
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/// This is a mid-level API; the high-level API is encodeText() and encodeBinary().
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@ -867,10 +872,12 @@ impl ReedSolomonGenerator {
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/// A segment of character/binary/control data in a QR Code symbol.
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///
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/// Instances of this struct are immutable.
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///
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/// The mid-level way to create a segment is to take the payload data
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/// and call a static factory function such as QrSegment::make_numeric().
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/// The low-level way to create a segment is to custom-make the bit buffer
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/// and call the QrSegment::new() constructor with appropriate values.
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///
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/// This segment struct imposes no length restrictions, but QR Codes have restrictions.
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/// Even in the most favorable conditions, a QR Code can only hold 7089 characters of data.
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/// Any segment longer than this is meaningless for the purpose of generating QR Codes.
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@ -898,7 +905,9 @@ impl QrSegment {
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/// Returns a segment representing the given binary data encoded in
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/// byte mode.
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///
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/// All input byte slices are acceptable. Any text string
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/// All input byte slices are acceptable.
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///
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/// Any text string
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/// can be converted to UTF-8 bytes and encoded as a byte mode segment.
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pub fn make_bytes(data: &[u8]) -> Self {
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let mut bb = BitBuffer(Vec::with_capacity(data.len() * 8));
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