class Opal::Shader::ShaderContext

• Opal::Shader::ShaderContext
• Reference
• Object

Overview

Execution context provided to a text fragment shader for each evaluated cell.

Defined in:

opal/shader/context.cr

Constructors

• .new(x : Int32, y : Int32, local_x : Int32, local_y : Int32, width : Int32, height : Int32, region_width : Int32, region_height : Int32, time : Float64, frame : UInt64, source_buffer : UI::Buffer, cell : UI::Cell)

Instance Method Summary

• #bg : Color

  Background color getter & setter

• #bg=(color : Color)
• #bold! : Nil
• #bold=(val : Bool)
• #bold? : Bool

  Attribute flags

• #cell : UI::Cell
• #cell=(cell : UI::Cell)
• #char : Char

  Character getter & setter

• #char=(ch : Char)
• #dim! : Nil
• #dim=(val : Bool)
• #dim? : Bool
• #discard : Nil

  Discards current cell modifications

• #discarded=(discarded : Bool)
• #discarded? : Bool
• #dist_center : Float64

  Distance from center (0.5, 0.5)

• #dist_from(cx : Float64, cy : Float64) : Float64

  Distance from specific normalized coordinates (cx, cy)

• #fg : Color

  Foreground color getter & setter

• #fg=(color : Color)
• #frame : UInt64
• #frame=(frame : UInt64)
• #height : Int32
• #height=(height : Int32)
• #invert! : Nil
• #italic=(val : Bool)
• #italic? : Bool
• #lerp_bg(target : Color, factor : Float64) : Nil

  Interpolates active background color toward target color

• #lerp_fg(target : Color, factor : Float64) : Nil

  Interpolates active foreground color toward target color

• #local_u : Float64
• #local_u=(local_u : Float64)
• #local_v : Float64
• #local_v=(local_v : Float64)
• #local_x : Int32
• #local_x=(local_x : Int32)
• #local_y : Int32
• #local_y=(local_y : Int32)
• #noise : Float64

  Fast deterministic pseudo-random float between 0.0 and 1.0

• #region_height : Int32
• #region_height=(region_height : Int32)
• #region_width : Int32
• #region_width=(region_width : Int32)
• #replace_from(other : UI::Cell) : Nil

  Replaces current cell state entirely from another cell

• #reset(x : Int32, y : Int32, local_x : Int32, local_y : Int32, width : Int32, height : Int32, region_width : Int32, region_height : Int32, time : Float64, frame : UInt64, source_buffer : UI::Buffer, cell : UI::Cell) : Nil

  Mutates context in-place to avoid per-cell heap allocations during fragment shader passes

• #reverse=(val : Bool)
• #reverse? : Bool
• #sample(sx : Int32, sy : Int32) : UI::Cell

  Samples another cell from the input source buffer

• #sample_char(sx : Int32, sy : Int32) : Char

  Samples only the character from the input source buffer

• #sample_fg(sx : Int32, sy : Int32) : Color

  Samples only the foreground color from the input source buffer

• #source_buffer : UI::Buffer
• #source_buffer=(source_buffer : UI::Buffer)
• #time : Float64
• #time=(time : Float64)
• #u : Float64
• #u=(u : Float64)
• #underline=(val : Bool)
• #underline? : Bool
• #v : Float64
• #v=(v : Float64)
• #wave(freq : Float64 = 1.0, speed : Float64 = 1.0) : Float64

  Procedural trigonometric wave functions (accelerated via FastMath LUT)

• #wave_y(freq : Float64 = 1.0, speed : Float64 = 1.0) : Float64
• #width : Int32
• #width=(width : Int32)
• #x : Int32
• #x=(x : Int32)
• #y : Int32
• #y=(y : Int32)

Constructor Detail

Instance Method Detail