void drawPixels(BitmapData source, Rectangle<num> sourceRect, Point<num> destPoint, [ BlendMode blendMode ])

See BitmapData.drawPixels

Source 

void drawPixels(BitmapData source, Rectangle<num> sourceRect, Point<num> destPoint,
                [BlendMode blendMode]) {

  var sourceQuad = source.renderTextureQuad.cut(sourceRect);
  var renderState = new RenderState(_renderContext, _drawMatrix, 1.0, blendMode);
  renderState.globalMatrix.prependTranslation(destPoint.x, destPoint.y);
  renderState.renderTextureQuad(sourceQuad);
}