blender.coffee

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blender.coffee
¶

Built-in layer blenders. Many of these mimic Photoshop blend modes.
```
class Caman.Blender
  @blenders = {}
```
¶

Registers a blender. Can be used to add your own blenders outside of the core library, if needed.

@param [String] name Name of the blender. @param [Function] func The blender function.
```
  @register: (name, func) -> @blenders[name] = func
```
¶

Executes a blender to combine a layer with its parent.
¶

@param [String] name Name of the blending function to invoke. @param [Object] rgbaLayer RGBA object of the current pixel from the layer. @param [Object] rgbaParent RGBA object of the corresponding pixel in the parent layer. @return [Object] RGBA object representing the blended pixel.
```
  @execute: (name, rgbaLayer, rgbaParent) ->
    @blenders[name](rgbaLayer, rgbaParent)

Blender = Caman.Blender
```