class Opal::UI::AsciiImage

Overview

UI Element that renders TrueColor pixel buffers as terminal ASCII art. Supports high-resolution half-block rendering, optical luminance nearest-char rendering, nearest-neighbor & bilinear interpolation, and aspect ratio compensation.

Defined in:

opal/ui/components/ascii_image.cr

Constant Summary

RAMP_BLOCKS = " ░▒▓█"

High-contrast glyph ramp

RAMP_DETAILED = " .'`^\",:;Il!i><~+_-?][}{1)(|\\/tfjrxnuvczXYUJCLQ0OZmwqpdbkhao*#MW&8%B@$"

Detailed 70-level ASCII optical density ramp

RAMP_STANDARD = " .:-=+*#%@"

Standard 10-level ASCII optical density ramp (light to dark)

Constructors

Instance Method Summary

Instance methods inherited from class Opal::UI::Element

add_class(name : String) : self add_class, children : Array(Element) children, classes : Set(String) classes, classes=(classes : Set(String)) classes=, has_class?(name : String) : Bool has_class?, id : String | Nil id, id=(id : String | Nil) id=, preferred_print_size(available_w : Int32) : Tuple(Int32, Int32) preferred_print_size, preferred_size(available_w : Int32, available_h : Int32) : Tuple(Int32, Int32) preferred_size, print(io : IO = STDOUT, width : Int32 | Nil = nil, color : Bool | Nil = nil, theme : Theme | Nil = nil) : Nil print, query(selector : String) : Array(Element)
query(klass : T.class) : Array(T) forall T query, query_one(selector : String) : Element
query_one(klass : T.class) : T forall T query_one, query_one?(selector : String) : Element | Nil
query_one?(klass : T.class) : T | Nil forall T query_one?, remove_class(name : String) : self remove_class, render(buffer : Buffer, x : Int32, y : Int32, width : Int32, height : Int32) : Nil render, render_print(buffer : Buffer, width : Int32, height : Int32) : Nil render_print, to_print_s(width : Int32 | Nil = nil, color : Bool | Nil = nil, theme : Theme | Nil = nil) : String to_print_s, to_string(width : Int32 | Nil = nil, color : Bool | Nil = nil, theme : Theme | Nil = nil) : String to_string

Instance methods inherited from module Opal::UI::Themable

current_theme : Theme current_theme, style(&block : self -> Nil) : self style, theme : Theme | Nil theme, theme=(theme : Theme | Nil) theme=, with_theme(new_theme : Theme | Symbol | String) : self with_theme

Constructor Detail

def self.new(image : Opal::Image::PixelBuffer, mode : Symbol | AsciiRenderMode = :half_block, interpolation : Symbol | Opal::Image::Interpolation = :bilinear, ramp : String = RAMP_STANDARD, colorize : Bool = true, bold : Bool = false, bg : Color | Symbol | String = Color.none) #

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Instance Method Detail

def bg : Color #

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def bg=(bg : Color) #

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def bold=(bold : Bool) #

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def bold? : Bool #

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def colorize=(colorize : Bool) #

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def colorize? : Bool #

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def image : Opal::Image::PixelBuffer #

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def image=(image : Opal::Image::PixelBuffer) #

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def interpolation : Opal::Image::Interpolation #

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def interpolation=(interpolation : Opal::Image::Interpolation) #

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def mode : AsciiRenderMode #

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def mode=(mode : AsciiRenderMode) #

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def preferred_size(available_w : Int32, available_h : Int32) : Tuple(Int32, Int32) #

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def ramp : String #

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def ramp=(ramp : String) #

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def render(buffer : Buffer, x : Int32, y : Int32, width : Int32, height : Int32) : Nil #

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