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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.gallery3d.filtershow.filters;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import com.android.gallery3d.filtershow.imageshow.GeometryMetadata;
public class ImageFilterGeometry extends ImageFilter {
private final Bitmap.Config mConfig = Bitmap.Config.ARGB_8888;
private GeometryMetadata mGeometry = null;
private static final String LOGTAG = "ImageFilterGeometry";
private static final boolean LOGV = false;
private static final int BOTH = 3;
private static final int VERTICAL = 2;
private static final int HORIZONTAL = 1;
private static final int NINETY = 1;
private static final int ONE_EIGHTY = 2;
private static final int TWO_SEVENTY = 3;
public ImageFilterGeometry() {
mName = "Geometry";
}
@Override
public ImageFilter clone() throws CloneNotSupportedException {
ImageFilterGeometry filter = (ImageFilterGeometry) super.clone();
return filter;
}
public void setGeometryMetadata(GeometryMetadata m) {
mGeometry = m;
}
native protected void nativeApplyFilterFlip(Bitmap src, int srcWidth, int srcHeight,
Bitmap dst, int dstWidth, int dstHeight, int flip);
native protected void nativeApplyFilterRotate(Bitmap src, int srcWidth, int srcHeight,
Bitmap dst, int dstWidth, int dstHeight, int rotate);
native protected void nativeApplyFilterCrop(Bitmap src, int srcWidth, int srcHeight,
Bitmap dst, int dstWidth, int dstHeight, int offsetWidth, int offsetHeight);
native protected void nativeApplyFilterStraighten(Bitmap src, int srcWidth, int srcHeight,
Bitmap dst, int dstWidth, int dstHeight, float straightenAngle);
public Matrix buildMatrix(Bitmap bitmap, boolean rotated) {
Matrix drawMatrix = new Matrix();
float dx = bitmap.getWidth() / 2.0f;
float dy = bitmap.getHeight() / 2.0f;
Matrix flipper = mGeometry.getFlipMatrix(bitmap.getWidth(), bitmap.getHeight());
drawMatrix.postConcat(flipper);
drawMatrix.postTranslate(-dx, -dy);
drawMatrix.postScale(1.0f / mGeometry.getScaleFactor(), 1.0f / mGeometry.getScaleFactor());
float angle = (mGeometry.getRotation() + mGeometry.getStraightenRotation());
drawMatrix.postRotate(angle);
if (rotated) {
drawMatrix.postTranslate(dy, dx);
} else {
drawMatrix.postTranslate(dx, dy);
}
return drawMatrix;
}
@Override
public Bitmap apply(Bitmap bitmap, float scaleFactor, boolean highQuality) {
// TODO: implement bilinear or bicubic here... for now, just use
// canvas to do a simple implementation...
// TODO: and be more memory efficient! (do it in native?)
Bitmap temp = null;
float rotation = mGeometry.getRotation();
boolean rotated = false;
if (rotation == 0 || rotation % 180 == 0) {
temp = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), mConfig);
} else {
temp = Bitmap.createBitmap(bitmap.getHeight(), bitmap.getWidth(), mConfig);
rotated = true;
}
Matrix drawMatrix = buildMatrix(bitmap, rotated);
Canvas canvas = new Canvas(temp);
canvas.drawBitmap(bitmap, drawMatrix, new Paint());
return temp;
}
}
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