class

RQRCode::Export::PNG::Image

Мини-замена ChunkyPNG::Image: RGBA-канва + PNG-энкодер (grayscale 8-bit).

Constructors

new(width : Int32, height : Int32, background : UInt32 = 4294967295_u32)

steps(width, new_width)

steps_residues(width, new_width)

[](x, y)

[]=(x, y, color)

height

resize(new_width : Int32, new_height : Int32) : Image

ChunkyPNG#resize — nearest neighbor (resample_nearest_neighbor): Bresenham-подход с накоплением дробной ошибки (steps/steps_residues)

save(path : String, _constraints = {} of String => String) : Image

to_blob

PNG-байты (grayscale 8-bit, color type 0)

to_s

Returns a nicely readable and concise string representation of this object, typically intended for users.

This method should usually not be overridden. It delegates to #to_s(IO) which can be overridden for custom implementations.

Also see #inspect.

width