### Install RQRCode Gem

Source: https://github.com/whomwah/rqrcode/blob/main/README.md

Instructions for adding the RQRCode gem to your project's Gemfile or installing it manually.

```ruby
gem "rqrcode", "~> 3.0"
```

```ruby
gem install rqrcode
```

--------------------------------

### RQRCodeCore::QRCode Examples

Source: https://github.com/whomwah/rqrcode/blob/main/README.md

Provides examples of creating QR codes with RQRCodeCore::QRCode using different data types and options.

```ruby
simple_qrcode = RQRCodeCore::QRCode.new("https://kyan.com", size: 2, level: :m, mode: :byte_8bit)

segment_qrcode = RQRCodeCore::QRCode.new([{ data: "foo", mode: :byte_8bit }])

multi_qrcode = RQRCodeCore::QRCode.new([
  { data: 'foo', mode: :byte_8bit },
  { data: 'BAR1', mode: :alphanumeric }
])
```

--------------------------------

### SVG Rendering Example

Source: https://github.com/whomwah/rqrcode/blob/main/README.md

Demonstrates how to generate an SVG representation of a QR code using the `as_svg` method with specific options.

```ruby
require "rqrcode"

qrcode = RQRCode::QRCode.new("http://github.com/")

svg = qrcode.as_svg(
  color: "000",
  shape_rendering: "crispEdges",
  module_size: 11,
  standalone: true,
  use_path: true
)
```

--------------------------------

### Basic QR Code Generation

Source: https://github.com/whomwah/rqrcode/blob/main/README.md

Demonstrates the basic usage of RQRCode to create a QR code object from a string and print its string representation.

```ruby
require "rqrcode"

qr = RQRCode::QRCode.new("https://kyan.com")

puts qr.to_s
```

--------------------------------

### RQRCodeCore::QRCode Advanced Options

Source: https://github.com/whomwah/rqrcode/blob/main/README.md

Details the parameters for creating a QR code using RQRCodeCore::QRCode, including data, size, error correction level, and encoding mode.

```APIDOC
RQRCodeCore::QRCode.new(data, options)

Parameters:
  data - The string or array of segments to encode.
  size - The Integer size of the QR Code (defaults to smallest needed).
  max_size - The maximum Integer size of the QR Code (defaults to RQRCodeCore::QRUtil.max_size).
  level - The error correction level (:l, :m, :q, :h). Defaults to :h.
  mode - The encoding mode (:number, :alphanumeric, :byte_8bit). Defaults based on input data.
```

--------------------------------

### SVG Rendering Options

Source: https://github.com/whomwah/rqrcode/blob/main/README.md

Lists and explains the available options for rendering a QR code into SVG format, controlling padding, colors, module size, and SVG attributes.

```APIDOC
qrcode.as_svg(options)

Options:
  offset - Padding around the QR Code in pixels (default 0).
  offset_x - X Padding around the QR Code in pixels (default offset).
  offset_y - Y Padding around the QR Code in pixels (default offset).
  fill - Background color (e.g. "ffffff", :white, :currentColor) (default none).
  color - Foreground color (e.g. "000", :black, :currentColor) (default "000").
  module_size - The pixel size of each module (defaults 11).
  shape_rendering - SVG Attribute: auto | optimizeSpeed | crispEdges | geometricPrecision (defaults crispEdges).
  standalone - Whether to create a full SVG file (default true).
  use_path - Use <path> for rendering to reduce size (default false).
  viewbox - Replace width/height with viewBox for CSS scaling (default false).
  svg_attributes - Hash of custom <svg> attributes (default {}).
```

--------------------------------

### Generate PNG QR Code with ChunkyPNG

Source: https://github.com/whomwah/rqrcode/blob/main/README.md

Generates a QR code and outputs it as a PNG image using the ChunkyPNG gem. It supports various options for customization like color, size, and border.

```ruby
require "rqrcode"

qrcode = RQRCode::QRCode.new("http://github.com/")

# NOTE: showing with default options specified explicitly
png = qrcode.as_png(
  bit_depth: 1,
  border_modules: 4,
  color_mode: ChunkyPNG::COLOR_GRAYSCALE,
  color: "black",
  file: nil,
  fill: "white",
  module_px_size: 6,
  resize_exactly_to: false,
  resize_gte_to: false,
  size: 120
)

IO.binwrite("/tmp/github-qrcode.png", png.to_s)
```

--------------------------------

### Generate ANSI QR Code for Terminal

Source: https://github.com/whomwah/rqrcode/blob/main/README.md

Generates a QR code represented as a string with ANSI color codes, suitable for display in terminals. Customization options include foreground/background colors and fill characters.

```ruby
require "rqrcode"

qrcode = RQRCode::QRCode.new("http://github.com/")

# NOTE: showing with default options specified explicitly
svg = qrcode.as_ansi(
  light: "\033[47m", dark: "\033[40m",
  fill_character: "  ",
  quiet_zone_size: 4
)
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.