Bug 198839 Hide element on master page works only for PDF output
1. Insert any element (grid, label, image, text) in the header or footer of the master page. 2. Use the Visibility property to hide the element for all outputs. Expected result: Element does not appear in any of the output formats. Actual result: The element is hidden only in PDF.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/EngineTask.java
.setImageDirectory( htmlOptions.getImageDirectory( ) );
				htmlContext.setSupportedImageFormats( htmlOptions
						.getSupportedImageFormats( ) );
				htmlContext.SetRenderOption( allOptions );
				appContext.put( EngineConstants.APPCONTEXT_HTML_RENDER_CONTEXT,
						htmlContext );
			}
		}
	}
	protected void initializeContentEmitter( IContentEmitter emitter,
			IReportExecutor executor )
	{
		
		HashMap configs = engine.getConfig( ).getEmitterConfigs( );
		IReportContext reportContext = executionContext.getReportContext( );
		IRenderOption options = executionContext.getRenderOption( );
		EngineEmitterServices services = new EngineEmitterServices(
				reportContext, options, configs );
		
		emitter.initialize( services );
	}
	public int getTaskType( )
	{
		return taskType;
	}
	protected void changeStatusToRunning( )
	{
		runningStatus = STATUS_RUNNING;
	}
	protected void changeStatusToStopped( )