WarpView.java

package com.js.photosdk.bodywarp;

import com.joysoft.photosdk.R;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;

public class WarpView extends View
{
	private Bitmap mBmp;
	private int[] image;
	private int first = 0;
	private int[] colorR;
	private int[] colorG;
	private int[] colorB;
	private Bitmap newBmp;
	private boolean fg = true;
	private Context context;

	private static final int DEFAULT_PAINT_FLAGS = Paint.FILTER_BITMAP_FLAG
			| Paint.DITHER_FLAG;
	Paint mPaint = new Paint(DEFAULT_PAINT_FLAGS);

	public static int HWPPQ = 110;
	public static int MMQFJ = 120;

	private BodyWarp warp = new BodyWarp();

	private int MODE = MMQFJ;
	public WarpView(Context context)
	{
		super(context);
	}

	public WarpView(Context context, AttributeSet attrs)
	{
		super(context, attrs);
		this.context = context;
		dest = new RectF(0, 0, 0, 0);
	}

	@Override
	protected void onDraw(Canvas canvas)
	{
		if (fg)
		{
			int viewWidht = getWidth();
			int viewHeight = getHeight();
			float scale1 = (float) width / (float) viewWidht;
			float scale2 = (float) height / (float) viewHeight;
			scale = scale1 > scale2 ? scale1 : scale2;
			int xoffset = (viewWidht - (int) (width / scale)) / 2;
			int yoffset = (viewHeight - (int) (height / scale)) / 2;
			dest.set(xoffset, yoffset, (int) (width / scale) + xoffset,
					(int) (height / scale) + yoffset);

			canvas.drawBitmap(mBmp, null, dest, mPaint);

		} else
		{
			canvas.drawBitmap(newBmp, null, dest, mPaint);
		}
	}
	private double orig_x, orig_y;
	private double mou_dx, mou_dy;
	private double max_dist, max_dist_sq;
	private int width;
	private int height;
	private int count = 0;
	private double mou_dx_norm;
	private double mou_dy_norm;

	private float scale;
	private RectF dest;
	private double move_x, move_y;
	private int dist = (int) getResources().getDimension(R.dimen.max_dist);
	private int line_height = (int) getResources().getDimension(
			R.dimen.warp_line);
	@Override
	public boolean onTouchEvent(MotionEvent event)
	{

		switch (event.getAction())
		{
			case MotionEvent.ACTION_DOWN :
				orig_x = event.getX();
				orig_y = event.getY();
				orig_x = (orig_x - dest.left) * scale;
				orig_y = (orig_y - dest.top) * scale;

				break;
			case MotionEvent.ACTION_MOVE :
				max_dist = dist * scale;
				if (event.getAction() != 1)
				{

					move_x = event.getX();
					move_y = event.getY();

					move_x = (move_x - dest.left) * scale;
					move_y = (move_y - dest.top) * scale;

					// if(m > 0){
					// int i2 = m + -1;
					// orig_x = (event.getHistoricalX(i2) - dest.left)*scale;
					// orig_y = (event.getHistoricalY(i2) - dest.top)*scale;
					// }
					if (move_x >= 0 && move_y >= 0)
					{
						warp.warpPhotoFromC(image, height, width, max_dist,
								orig_x, orig_y, move_x, move_y);

						first++;

						newBmp.setPixels(image, 0, width, 0, 0, width, height);
						fg = false;
					}
				}
				orig_x = move_x;
				orig_y = move_y;

				break;
			case MotionEvent.ACTION_UP :
				break;
		}
		invalidate();
		return true;
	}
	public void setWarpBitmap(Bitmap bmp)
	{
		fg = true;// 重置标志
		first = 0;
		mBmp = bmp;
		width = bmp.getWidth();
		height = bmp.getHeight();

		newBmp = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
		image = new int[width * height];

		mBmp.getPixels(image, 0, width, 0, 0, width, height);
		newBmp.setPixels(image, 0, width, 0, 0, width, height);
	}
	public void setMode(int mode)
	{
		this.MODE = mode;
	}

	/**
	 * 返回处理好的图片
	 * 
	 * @return
	 */
	public Bitmap getWrapBitmap()
	{
		return newBmp;
	}

}