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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.gallery3d.filtershow.filters;
     18 
     19 import android.graphics.Bitmap;
     20 import android.graphics.Canvas;
     21 import android.graphics.Matrix;
     22 import android.graphics.Paint;
     23 import android.graphics.Rect;
     24 import android.graphics.RectF;
     25 import android.util.Log;
     26 
     27 import com.android.gallery3d.filtershow.crop.CropExtras;
     28 import com.android.gallery3d.filtershow.imageshow.GeometryMath;
     29 import com.android.gallery3d.filtershow.imageshow.GeometryMetadata;
     30 
     31 public class ImageFilterGeometry extends ImageFilter {
     32     private final Bitmap.Config mConfig = Bitmap.Config.ARGB_8888;
     33     private GeometryMetadata mGeometry = null;
     34     private static final String LOGTAG = "ImageFilterGeometry";
     35     private static final boolean LOGV = false;
     36     private static final int BOTH = 3;
     37     private static final int VERTICAL = 2;
     38     private static final int HORIZONTAL = 1;
     39     private static final int NINETY = 1;
     40     private static final int ONE_EIGHTY = 2;
     41     private static final int TWO_SEVENTY = 3;
     42 
     43     public ImageFilterGeometry() {
     44         mName = "Geometry";
     45     }
     46 
     47     @Override
     48     public ImageFilter clone() throws CloneNotSupportedException {
     49         // FIXME: clone() should not be needed. Remove when we fix geometry.
     50         ImageFilterGeometry filter = (ImageFilterGeometry) super.clone();
     51         return filter;
     52     }
     53 
     54     native protected void nativeApplyFilterFlip(Bitmap src, int srcWidth, int srcHeight,
     55             Bitmap dst, int dstWidth, int dstHeight, int flip);
     56 
     57     native protected void nativeApplyFilterRotate(Bitmap src, int srcWidth, int srcHeight,
     58             Bitmap dst, int dstWidth, int dstHeight, int rotate);
     59 
     60     native protected void nativeApplyFilterCrop(Bitmap src, int srcWidth, int srcHeight,
     61             Bitmap dst, int dstWidth, int dstHeight, int offsetWidth, int offsetHeight);
     62 
     63     native protected void nativeApplyFilterStraighten(Bitmap src, int srcWidth, int srcHeight,
     64             Bitmap dst, int dstWidth, int dstHeight, float straightenAngle);
     65 
     66     @Override
     67     public void useRepresentation(FilterRepresentation representation) {
     68         mGeometry = (GeometryMetadata) representation;
     69     }
     70 
     71     @Override
     72     public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) {
     73         // TODO: implement bilinear or bicubic here... for now, just use
     74         // canvas to do a simple implementation...
     75         // TODO: and be more memory efficient! (do it in native?)
     76         RectF cb = mGeometry.getPreviewCropBounds();
     77         RectF pb = mGeometry.getPhotoBounds();
     78         if (cb.width() == 0 || cb.height() == 0 || pb.width() == 0 || pb.height() == 0) {
     79             Log.w(LOGTAG, "Cannot apply geometry: geometry metadata has not been initialized");
     80             return bitmap;
     81         }
     82         CropExtras extras = mGeometry.getCropExtras();
     83         boolean useExtras = mGeometry.getUseCropExtrasFlag();
     84         int outputX = 0;
     85         int outputY = 0;
     86         boolean s = false;
     87         if (extras != null && useExtras){
     88             outputX = extras.getOutputX();
     89             outputY = extras.getOutputY();
     90             s = extras.getScaleUp();
     91         }
     92 
     93 
     94         Rect cropBounds = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
     95         RectF crop = mGeometry.getCropBounds(bitmap);
     96         if (crop.width() > 0 && crop.height() > 0)
     97             cropBounds = GeometryMath.roundNearest(crop);
     98 
     99         int width = cropBounds.width();
    100         int height = cropBounds.height();
    101 
    102         if (mGeometry.hasSwitchedWidthHeight()){
    103             int temp = width;
    104             width = height;
    105             height = temp;
    106         }
    107 
    108         if(outputX <= 0 || outputY <= 0){
    109             outputX = width;
    110             outputY = height;
    111         }
    112 
    113         float scaleX = 1;
    114         float scaleY = 1;
    115         if (s){
    116                 scaleX = (float) outputX / width;
    117                 scaleY = (float) outputY / height;
    118         }
    119 
    120         Bitmap temp = null;
    121         temp = Bitmap.createBitmap(outputX, outputY, mConfig);
    122 
    123         float[] displayCenter = {
    124                 temp.getWidth() / 2f, temp.getHeight() / 2f
    125         };
    126 
    127         Matrix m1 = mGeometry.buildTotalXform(bitmap.getWidth(), bitmap.getHeight(), displayCenter);
    128 
    129         m1.postScale(scaleX, scaleY, displayCenter[0], displayCenter[1]);
    130 
    131         Canvas canvas = new Canvas(temp);
    132         Paint paint = new Paint();
    133         paint.setAntiAlias(true);
    134         paint.setFilterBitmap(true);
    135         paint.setDither(true);
    136         canvas.drawBitmap(bitmap, m1, paint);
    137         return temp;
    138     }
    139 
    140 }
    141