TxSprite class

Inheritance

• Object
• TxMsg
• TxSprite

Constructors

TxSprite({required int msgCode, required int width, required int height, required int numColors, required Uint8List paletteData, required Uint8List pixelData})

Create a sprite with the specified size, palette data and pixel data, identified by the specified message code (the identifier used on the Lua side to label this sprite) width(Uint16), height(Uint16), bpp(Uint8), numColors(Uint8), palette (Uint8 r, Uint8 g, Uint8 b)*numColors, data (length: width x height bytes content: palette index)

TxSprite.fromImageBytes({required int msgCode, required Uint8List imageBytes})

Create a TxSprite from any image bytes that can be decoded by img.decode() If it's an indexed image, quantize down to 14 colors if larger (plus black, white as palette entries 0 and 1.) If it's an RGB image, also quantize to 14 colors (then prepend black and white) Scale to 640x400 preserving aspect ratio for 1- or 2-bit images Scale to ~128k pixels preserving aspect ratio for 4-bit images TODO improve quantization - quality, speed If quantizing, since neuralNet seems to give the black in entry 0 and white in the last entry We just leave 0 (black) and swap palette entries 1 and 15 (and remap those pixels)

TxSprite.fromPngBytes({required int msgCode, required Uint8List pngBytes})

Create a TxSprite from an indexed PNG Sprites should be PNGs with palettes of up to 2, 4, or 16 colors (1-, 2-, or 4-bit indexed palettes) Alpha channel (4th-RGBA), if present, is dropped before sending to Frame (RGB only, but color 0 is VOID) Scale to 640x400 if larger, preserving aspect ratio

Properties

hashCode → int

The hash code for this object.

no setter, inherited

height → int

no setter

msgCode → int

no setter, inherited

numColors → int

no setter

paletteData → Uint8List

no setter

pixelData → Uint8List

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

width → int

no setter

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

pack() → Uint8List

Corresponding parser should be called from frame_app.lua data_handler()

override

toImage() → Image

Convert TxSprite back to an image for testing/verification

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

pack1Bit(Uint8List bpp1) → Uint8List

pack2Bit(Uint8List bpp2) → Uint8List

pack4Bit(Uint8List bpp4) → Uint8List