BlankModeRedrawHandler.java

/*
  BlankModeRedrawHandler.java

  (c) 2008-2015 Edward Swartz

  All rights reserved. This program and the accompanying materials
  are made available under the terms of the Eclipse Public License v1.0
  which accompanies this distribution, and is available at
  http://www.eclipse.org/legal/epl-v10.html
 */
package v9t9.video;

import v9t9.common.video.RedrawBlock;
import v9t9.video.common.VdpModeInfo;



/**
 * @author ejs
 *
 */
public class BlankModeRedrawHandler extends BaseRedrawHandler implements
		IVdpModeBlockRedrawHandler, IVdpModeRowRedrawHandler {

	public BlankModeRedrawHandler(VdpRedrawInfo info, VdpModeInfo modeInfo) {
		super(info, modeInfo);
		
		info.touch.patt = null;
		info.touch.sprite = info.touch.sprpat = null;
		info.touch.screen = null;
		info.touch.color = null;
	}

	/* (non-Javadoc)
	 * @see v9t9.emulator.clients.builtin.InternalVdp.VdpModeRedrawHandler#propagateTouches()
	 */
	public void prepareUpdate() {
		propagatePatternTouches();
	}

	/* (non-Javadoc)
	 * @see v9t9.emulator.clients.builtin.InternalVdp.VdpModeRedrawHandler#updateCanvas(v9t9.emulator.clients.builtin.VdpCanvas, v9t9.emulator.clients.builtin.InternalVdp.RedrawBlock[])
	 */
	public int updateCanvas(RedrawBlock[] blocks) {
		return 0;
	}


	/* (non-Javadoc)
	 * @see v9t9.video.IVdpModeRowRedrawHandler#getCharsPerRow()
	 */
	@Override
	public int getCharsPerRow() {
		return 32;
	}

	/* (non-Javadoc)
	 * @see v9t9.video.IVdpModeRowRedrawHandler#updateCanvasBlockRow(int)
	 */
	@Override
	public void updateCanvasBlock(int screenOffs, int col, int row) {

		byte bg = (byte) ((info.vdpregs[7] ) & 0xf);
		for (int x = 0; x < getCharsPerRow(); x++) {
			info.canvas.draw8x8TwoColorBlock(row, x * 8, solidBlockPattern, bg, bg);
		}		
	}
	
	/* (non-Javadoc)
	 * @see v9t9.video.IVdpModeRowRedrawHandler#updateCanvas(int, int)
	 */
	@Override
	public void updateCanvasRow(int row, int col) {
//		System.out.println("blank: " + prevScanline + " - " + currentScanline);
		
		byte bg = (byte) ((info.vdpregs[7] ) & 0xf);
		int rowOffs = info.canvas.getBitmapOffset(0, row); 
		for (int x = info.canvas.getWidth() - 8; x >= 0; x -= 8) {
			info.canvas.drawEightPixels(rowOffs + x, (byte) 0xff, bg, bg);
		}
	}
}