Bug 179431 [Automation]Chart background color issue[0602]
Details: [Automation]Chart background color issue[0602] Step: 1. Add a chart and set output format as jpg/bmp. 2. Add a chart and set output format as png/svg. Actual result: Step 1: Background color of chart is baby blue. Step 2: Background color of chart is black.
chart/org.eclipse.birt.chart.device.extension/src/org/eclipse/birt/chart/device/image/PngRendererImpl.java
{
    /* (non-Javadoc)
     * @see org.eclipse.birt.chart.device.image.JavaxImageIOWriter#getFormat()
     */
    public final String getFormat()
    {
        return "png"; 
    }
    
    /* (non-Javadoc)
     * @see org.eclipse.birt.chart.device.IImageMapEmitter#getMimeType()
     */
    public String getMimeType( )
    {
    	return "image/png"; 
    }
    /* (non-Javadoc)
     * @see org.eclipse.birt.chart.device.image.JavaxImageIOWriter#getImageType()
     */
    public final int getImageType()
    {
        return BufferedImage.TYPE_INT_ARGB; 
    }
}