/**
* Change color space from RGBA to RGB
* @param {Object} backgroundColor in {r: 0, g: 0, b: 0} format where each component is normalized between 0 and 1
*/
function RgbaToRgb(backgroundColor) {
PixelStream.call(this);
this.backgroundColor = {
r: backgroundColor ? backgroundColor.r | 0 : 0,
g: backgroundColor ? backgroundColor.g | 0 : 0,
b: backgroundColor ? backgroundColor.b | 0 : 0
};
this.buffer = new BufferList();
}
function ImageEncoder(type, opts) {
PixelStream.call(this, opts);
var encoder = ImageEncoder.find(type, opts);
if (!encoder)
throw new Error('Unsupported image encoder: ' + type);
this._input = encoder;
this._output = encoder;
}
// A test encoder
// It accepts a parameter to decide what the supported color
// spaces should be and outputs the pixel data unchanged.
function TestEncoder(cs) {
PixelStream.call(this);
this.supportedColorSpaces = arguments.length ? cs : ['rgb', 'gray'];
}
/**
* Change color space from RGBA to RGB
* @param {Object} backgroundColor in {r: 0, g: 0, b: 0} format where each component is normalized between 0 and 1
*/
function ExtractAlpha() {
PixelStream.call(this);
this.buffer = new BufferList();
}