textmode.js / filters / TextmodeFilterManager

Class: TextmodeFilterManager

Manages filter registration, shader compilation, and filter chain application.

Used both for layer-level filters and global post-processing filters.

Example

// Register a custom filter
await t.filters.register('brightness', brightnessShader, {
    u_amount: ['amount', 1.0]
});

// Use the filter globally
t.filter('brightness', 1.5);

// Or on a layer
t.layers.base.filter('brightness', { amount: 0.8 });

Methods

has()

has(id): boolean;

Check if a filter with the given ID is registered.

Parameters

Parameter	Type	Description
id	string	The filter ID to check

Returns

boolean

true if the filter exists

---

register()

register(
   id, 
   shader, 
uniformDefs): Promise<void>;

Register a custom filter with the given ID, shader, and uniform definitions.

Parameters

Parameter	Type	Description
id	string	Unique filter identifier
shader	string | GLShader	Pre-compiled GLShader, fragment shader source string, or path to a .frag/.glsl file
uniformDefs	Record<string, [string, unknown]>	Maps uniform names to [paramName, defaultValue] tuples

Returns

Promise<void>

Example

// Register with inline shader source
await t.filters.register('blur', blurFragSource, {
    u_radius: ['radius', 5.0],
    u_direction: ['direction', [1.0, 0.0]]
});

// Register with file path
await t.filters.register('vignette', './vignette.frag', {
    u_intensity: ['intensity', 0.5]
});

---

unregister()

unregister(id): boolean;

Unregister a filter by its ID.

Parameters

Parameter	Type	Description
id	string	The filter ID to unregister

Returns

boolean

true if the filter was unregistered, false if it wasn't found