Android – 图像扭曲效果

概述在我的 Android应用程序中,我想应用 Photo Warp和 Photo Deformer应用程序中提供的图像扭曲效果.为此,我使用了BitmapMesh.问题是,它不能保存扭曲的图像.每当我触摸图像时,它都会刷新图像并且不会保存我之前变形的图像.我想在用户执行扭曲 *** 作时保存该图像.我在这里发布我的代码.这里我使用“BitmapMesh”活动来对图像执行扭曲效果. 请帮我解决这个问题. 谢谢 在我的 Android应用程序中,我想应用 Photo Warp和 Photo Deformer应用程序中提供的图像扭曲效果.为此,我使用了BitmapMesh.问题是,它不能保存扭曲的图像.每当我触摸图像时,它都会刷新图像并且不会保存我之前变形的图像.我想在用户执行扭曲 *** 作时保存该图像.我在这里发布我的代码.这里我使用“BitmapMesh”活动来对图像执行扭曲效果.

请帮我解决这个问题.
谢谢.

码：

BitmapMesh活动：

import androID.content.Context;import androID.graphics.Bitmap;import androID.graphics.BitmapFactory;import androID.graphics.Canvas;import androID.graphics.Matrix;import androID.os.Bundle;import androID.util.floatMath;import androID.vIEw.MotionEvent;import androID.vIEw.VIEw;public class BitmapMesh extends GraphicsActivity {    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(new SampleVIEw(this));    }    private static class SampleVIEw extends VIEw {        private static final int WIDTH = 20;        private static final int HEIGHT = 20;        private static final int COUNT = (WIDTH + 1) * (HEIGHT + 1);        private final Bitmap mBitmap;        private final float[] mVerts = new float[COUNT * 2];        private final float[] mOrig = new float[COUNT * 2];        private final Matrix mMatrix = new Matrix();        private final Matrix mInverse = new Matrix();        private static voID setXY(float[] array,int index,float x,float y) {            array[index * 2 + 0] = x;            array[index * 2 + 1] = y;        }        public SampleVIEw(Context context) {            super(context);            setFocusable(true);            mBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.image1);            float w = mBitmap.getWIDth();            float h = mBitmap.getHeight();            // construct our mesh            int index = 0;            for (int y = 0; y <= HEIGHT; y++) {                float fy = h * y / HEIGHT;                for (int x = 0; x <= WIDTH; x++) {                    float fx = w * x / WIDTH;                    setXY(mVerts,index,fx,fy);                    setXY(mOrig,fy);                    index += 1;                }            }            mMatrix.setTranslate(10,10);            mMatrix.invert(mInverse);        }        @OverrIDe        protected voID onDraw(Canvas canvas) {            canvas.drawcolor(0xFFCCCCCC);            canvas.concat(mMatrix);            canvas.drawBitmapMesh(mBitmap,WIDTH,HEIGHT,mVerts,null,null);        }        private voID warp(float cx,float cy) {            final float K = 10000;            float[] src = mOrig;            float[] dst = mVerts;            for (int i = 0; i < COUNT * 2; i += 2) {                float x = src[i + 0];                float y = src[i + 1];                float dx = cx - x;                float dy = cy - y;                float dd = dx * dx + dy * dy;                float d = floatMath.sqrt(dd);                float pull = K / (dd + 0.000001f);                pull /= (d + 0.000001f);                // androID.util.Log.d("skia","index " + i + " dist=" + d +                // " pull=" + pull);                if (pull >= 1) {                    dst[i + 0] = cx;                    dst[i + 1] = cy;                } else {                    dst[i + 0] = x + dx * pull;                    dst[i + 1] = y + dy * pull;                }            }        }        private int mLastWarpX = -9999; // don't match a touch coordinate        private int mLastWarpY;        @OverrIDe        public boolean ontouchEvent(MotionEvent event) {            float[] pt = { event.getX(),event.getY() };            mInverse.mapPoints(pt);            int x = (int) pt[0];            int y = (int) pt[1];            if (mLastWarpX != x || mLastWarpY != y) {                mLastWarpX = x;                mLastWarpY = y;                warp(pt[0],pt[1]);                invalIDate();            }            return true;        }    }}

图形活动：

import androID.app.Activity;import androID.os.Bundle;import androID.vIEw.VIEw;import androID.vIEw.VIEwGroup;class GraphicsActivity extends Activity {    // set to true to test Picture    private static final boolean TEST_PICTURE = false;    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);    }    @OverrIDe    public voID setContentVIEw(VIEw vIEw) {        if (TEST_PICTURE) {            VIEwGroup vg = new PictureLayout(this);            vg.addVIEw(vIEw);            vIEw = vg;        }        super.setContentVIEw(vIEw);    }}

PictureLayout.java

import androID.content.Context;import androID.graphics.Canvas;import androID.graphics.Picture;import androID.graphics.Rect;import androID.graphics.drawable.Drawable;import androID.util.AttributeSet;import androID.vIEw.VIEw;import androID.vIEw.VIEwGroup;import androID.vIEw.VIEwParent;class PictureLayout extends VIEwGroup {    private final Picture mPicture = new Picture();    public PictureLayout(Context context) {        super(context);    }    public PictureLayout(Context context,AttributeSet attrs) {        super(context,attrs);    }    @OverrIDe    public voID addVIEw(VIEw child) {        if (getChildCount() > 1) {            throw new IllegalStateException(                    "PictureLayout can host only one direct child");        }        super.addVIEw(child);    }    @OverrIDe    public voID addVIEw(VIEw child,int index) {        if (getChildCount() > 1) {            throw new IllegalStateException(                    "PictureLayout can host only one direct child");        }        super.addVIEw(child,index);    }    @OverrIDe    public voID addVIEw(VIEw child,LayoutParams params) {        if (getChildCount() > 1) {            throw new IllegalStateException(                    "PictureLayout can host only one direct child");        }        super.addVIEw(child,params);    }    @OverrIDe    public voID addVIEw(VIEw child,params);    }    @OverrIDe    protected LayoutParams generateDefaultLayoutParams() {        return new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);    }    @OverrIDe    protected voID onMeasure(int wIDthMeasureSpec,int heightmeasureSpec) {        final int count = getChildCount();        int maxHeight = 0;        int maxWIDth = 0;        for (int i = 0; i < count; i++) {            final VIEw child = getChildAt(i);            if (child.getVisibility() != GONE) {                measureChild(child,wIDthMeasureSpec,heightmeasureSpec);            }        }        maxWIDth += getpaddingleft() + getpaddingRight();        maxHeight += getpaddingtop() + getpaddingBottom();        Drawable drawable = getBackground();        if (drawable != null) {            maxHeight = Math.max(maxHeight,drawable.getMinimumHeight());            maxWIDth = Math.max(maxWIDth,drawable.getMinimumWIDth());        }        setMeasuredDimension(resolveSize(maxWIDth,wIDthMeasureSpec),resolveSize(maxHeight,heightmeasureSpec));    }    private voID drawPict(Canvas canvas,int x,int y,int w,int h,float sx,float sy) {        canvas.save();        canvas.translate(x,y);        canvas.clipRect(0,w,h);        canvas.scale(0.5f,0.5f);        canvas.scale(sx,sy,h);        canvas.drawPicture(mPicture);        canvas.restore();    }    @OverrIDe    protected voID dispatchDraw(Canvas canvas) {        super.dispatchDraw(mPicture.beginRecording(getWIDth(),getHeight()));        mPicture.endRecording();        int x = getWIDth() / 2;        int y = getHeight() / 2;        if (false) {            canvas.drawPicture(mPicture);        } else {            drawPict(canvas,x,y,1,1);            drawPict(canvas,-1,-1);            drawPict(canvas,-1);        }    }    @OverrIDe    public VIEwParent invalIDateChildInParent(int[] location,Rect dirty) {        location[0] = getleft();        location[1] = gettop();        dirty.set(0,getWIDth(),getHeight());        return getParent();    }    @OverrIDe    protected voID onLayout(boolean changed,int l,int t,int r,int b) {        final int count = super.getChildCount();        for (int i = 0; i < count; i++) {            final VIEw child = getChildAt(i);            if (child.getVisibility() != GONE) {                final int childleft = getpaddingleft();                final int childtop = getpaddingtop();                child.layout(childleft,childtop,childleft + child.getMeasureDWIDth(),childtop + child.getMeasuredHeight());            }        }    }}

解决方法

//little changes in this pIEce of code  float[] dst; //Globalpublic SampleVIEw(Context context) {        super(context);        setFocusable(true);        mBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.image1);        float w = mBitmap.getWIDth();        float h = mBitmap.getHeight();        // construct our mesh        int index = 0;        for (int y = 0; y <= HEIGHT; y++) {            float fy = h * y / HEIGHT;            for (int x = 0; x <= WIDTH; x++) {                float fx = w * x / WIDTH;                setXY(mVerts,fy);                setXY(mOrig,fy);                index += 1;                dst=mVerts;//Assign dst here just once            }        }        mMatrix.setTranslate(10,10);        mMatrix.invert(mInverse);    }    @OverrIDe    protected voID onDraw(Canvas canvas) {        canvas.drawcolor(0xFFCCCCCC);        canvas.concat(mMatrix);        canvas.drawBitmapMesh(mBitmap,null);    }    private voID warp(float cx,float cy) {        final float K = 10000;        float[] src = dst; //Now you are applying wrap effect on the last effected pixels        for (int i = 0; i < COUNT * 2; i += 2) {            float x = src[i + 0];            float y = src[i + 1];            float dx = cx - x;            float dy = cy - y;            float dd = dx * dx + dy * dy;            float d = floatMath.sqrt(dd);            float pull = K / (dd + 0.000001f);            pull /= (d + 0.000001f);            // androID.util.Log.d("skia","index " + i + " dist=" + d +            // " pull=" + pull);            if (pull >= 1) {                dst[i + 0] = cx;                dst[i + 1] = cy;            } else {                dst[i + 0] = x + dx * pull;                dst[i + 1] = y + dy * pull;            }        }    }

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