API Documentation for: 1.0.0
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ColorFilter Class

Extends Filter
Defined in: ColorFilter:41
Module: EaselJS

Applies a color transform to DisplayObjects.

Example

This example draws a red circle, and then transforms it to Blue. This is accomplished by multiplying all the channels to 0 (except alpha, which is set to 1), and then adding 255 to the blue channel.

 var shape = new createjs.Shape().set({x:100,y:100});
 shape.graphics.beginFill("#ff0000").drawCircle(0,0,50);

 shape.filters = [
     new createjs.ColorFilter(0,0,0,1, 0,0,255,0)
 ];
 shape.cache(-50, -50, 100, 100);

See Filter for an more information on applying filters.

Constructor

ColorFilter

(
  • [redMultiplier=1]
  • [greenMultiplier=1]
  • [blueMultiplier=1]
  • [alphaMultiplier=1]
  • [redOffset=0]
  • [greenOffset=0]
  • [blueOffset=0]
  • [alphaOffset=0]
)

Defined in ColorFilter:41

Parameters:

  • [redMultiplier=1] Number optional

    The amount to multiply against the red channel. This is a range between 0 and 1.

  • [greenMultiplier=1] Number optional

    The amount to multiply against the green channel. This is a range between 0 and 1.

  • [blueMultiplier=1] Number optional

    The amount to multiply against the blue channel. This is a range between 0 and 1.

  • [alphaMultiplier=1] Number optional

    The amount to multiply against the alpha channel. This is a range between 0 and 1.

  • [redOffset=0] Number optional

    The amount to add to the red channel after it has been multiplied. This is a range between -255 and 255.

  • [greenOffset=0] Number optional

    The amount to add to the green channel after it has been multiplied. This is a range between -255 and 255.

  • [blueOffset=0] Number optional

    The amount to add to the blue channel after it has been multiplied. This is a range between -255 and 255.

  • [alphaOffset=0] Number optional

    The amount to add to the alpha channel after it has been multiplied. This is a range between -255 and 255.

Methods

_applyFilter

(
  • imageData
)
Boolean

Inherited from Filter: _applyFilter:179

Parameters:

  • imageData ImageData

    Target ImageData instance.

Returns:

Boolean:

applyFilter

(
  • ctx
  • x
  • y
  • width
  • height
  • [targetCtx]
  • [targetX]
  • [targetY]
)
Boolean

Inherited from Filter: applyFilter:130

Applies the filter to the specified context.

Parameters:

  • ctx CanvasRenderingContext2D

    The 2D context to use as the source.

  • x Number

    The x position to use for the source rect.

  • y Number

    The y position to use for the source rect.

  • width Number

    The width to use for the source rect.

  • height Number

    The height to use for the source rect.

  • [targetCtx] CanvasRenderingContext2D optional

    The 2D context to draw the result to. Defaults to the context passed to ctx.

  • [targetX] Number optional

    The x position to draw the result to. Defaults to the value passed to x.

  • [targetY] Number optional

    The y position to draw the result to. Defaults to the value passed to y.

Returns:

Boolean:

If the filter was applied successfully.

clone

() Filter

Inherited from Filter: clone:169

Returns a clone of this Filter instance.

Returns:

Filter:

A clone of the current Filter instance.

getBounds

(
  • [rect]
)
Rectangle

Inherited from Filter: getBounds:111

Provides padding values for this filter. That is, how much the filter will extend the visual bounds of an object it is applied to.

Parameters:

  • [rect] Rectangle optional

    If specified, the provided Rectangle instance will be expanded by the padding amounts and returned.

Returns:

Rectangle:

If a rect param was provided, it is returned. If not, either a new rectangle with the padding values, or null if no padding is required for this filter.

shaderParamSetup

(
  • gl
  • stage
  • shaderProgram
)

Inherited from Filter: shaderParamSetup:121

Assign any unique uniforms or other setup functionality here.

Parameters:

  • gl WebGLContext

    The context associated with the stage performing the render.

  • stage StageGL

    The stage instance that will be rendering.

  • shaderProgram ShaderProgram

    The compiled shader that is going to be used to perform the render.

toString

() String

Inherited from Filter: toString:160

Returns a string representation of this object.

Returns:

String:

a string representation of the instance.

Properties

_multiPass

Filter private

Inherited from Filter: _multiPass:79

Another filter that is required to act as part of this filter and created and managed under the hood.

Default: null

alphaMultiplier

Number

Defined in alphaMultiplier:98

Alpha channel multiplier.

alphaOffset

Number

Defined in alphaOffset:126

Alpha channel offset (added to value).

blueMultiplier

Number

Defined in blueMultiplier:91

Blue channel multiplier.

blueOffset

Number

Defined in blueOffset:119

Blue channel offset (added to value).

FRAG_SHADER

String readonly

Inherited from Filter: FRAG_SHADER:98

Pre-processed template shader code. It will be parsed before being fed in into the shader compiler. This should be based upon StageGL.SHADER_FRAGMENT_BODY_REGULAR

greenMultiplier

Number

Defined in greenMultiplier:84

Green channel multiplier.

greenOffset

Number

Defined in greenOffset:112

Green channel offset (added to value).

redMultiplier

Number

Defined in redMultiplier:77

Red channel multiplier.

redOffset

Number

Defined in redOffset:105

Red channel offset (added to value).

usesContext

Boolean

Inherited from Filter: usesContext:71

A flag stating that this filter uses a context draw mode and cannot be batched into imageData processing.

Default: false

VTX_SHADER

String readonly

Inherited from Filter: VTX_SHADER:88

Pre-processed template shader code. It will be parsed before being fed in into the shader compiler. This should be based upon StageGL.SHADER_VERTEX_BODY_REGULAR