| /* |
| * Copyright (C) 2015 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 rs.example.android.com.healingbrush; |
| |
| import android.graphics.Bitmap; |
| import android.graphics.Rect; |
| import android.graphics.RectF; |
| import android.renderscript.Allocation; |
| import android.renderscript.Element; |
| import android.renderscript.RenderScript; |
| import android.renderscript.Type; |
| import android.util.Log; |
| |
| import com.example.android.rs.sample.ScriptC_find_region; |
| |
| public class FindRegion { |
| private static final String TAG = "FindRegion"; |
| |
| Rect mRoiBounds; // bounding box of the ROI |
| float[] mPointsXY; // polygon point in original image coordnates |
| |
| int mCutOffsetX; // image coords of the cut (mPointsXY - mPasteOffX + mCutOffsetX) |
| int mCutOffsetY; // image coords of the cut (mPointsXY - mPasteOffY + mCutOffsetY) |
| |
| public FindRegion(float[] xy, Bitmap img) { |
| mPointsXY = xy; |
| int imgWidth = img.getWidth(); |
| int imgHeight = img.getHeight(); |
| mRoiBounds = getBoundingRect(xy); |
| |
| if (mRoiBounds.height() <= 2 || |
| mRoiBounds.left < 0 |
| || mRoiBounds.top < 0 |
| || mRoiBounds.right >= imgWidth |
| || mRoiBounds.bottom >= imgHeight) { |
| throw new RuntimeException("ROI to close to the edge of the image"); |
| } |
| |
| } |
| |
| public int getCutOffsetX() { |
| return mCutOffsetX; |
| } |
| |
| public int getCutOffsetY() { |
| return mCutOffsetY; |
| } |
| |
| public Rect getRoiBounds() { |
| return mRoiBounds; |
| } |
| |
| Allocation allocFloat2(float[] p, RenderScript rs) { |
| Type.Builder builderF32_2 = new Type.Builder(rs, Element.F32_2(rs)); |
| builderF32_2.setX(p.length / 2); |
| Allocation ret = Allocation.createTyped(rs, builderF32_2.create()); |
| ret.copyFrom(p); |
| return ret; |
| } |
| |
| public Rect findMatch(ScriptC_find_region findRegion, RenderScript mRs, Bitmap image) { |
| long time = System.nanoTime(); |
| |
| Allocation border_coords; |
| |
| border_coords = allocFloat2(mPointsXY, mRs); |
| Allocation aImage = Allocation.createFromBitmap(mRs, image); |
| Allocation ret = Allocation.createSized(mRs, Element.I32_2(mRs), 1); |
| |
| findRegion.invoke_findRegion(border_coords, aImage, image.getWidth(), image.getHeight(), ret); |
| |
| int[] mina = new int[2]; |
| ret.copyTo(mina); |
| mCutOffsetX = mina[0]; |
| mCutOffsetY = mina[1]; |
| Log.v(TAG, "New best location = " + mCutOffsetX + ", " + mCutOffsetY); |
| Log.v(TAG, "Time to find replacement= " + (System.nanoTime() - time) / 1E6f + "ms"); |
| |
| return mRoiBounds; |
| } |
| |
| /** |
| * Computes the bounding box of the polygon |
| * then pads and sizes to multiple of 8 |
| * |
| * @param xy points of polygon [x1,y1,x2,y2,...] |
| * @return rectangle |
| */ |
| private static Rect getBoundingRect(float[] xy) { |
| RectF mRect = calcBounds(xy); |
| int mWidth = (((int) (8 + mRect.width())) & ~3); // bounding rectangle that is a power of 8 |
| int mHeight = (((int) (8 + mRect.height())) & ~3); |
| int mPasteOffX = (int) mRect.left - 1; |
| int mPasteOffY = (int) mRect.top - 1; |
| return new Rect(mPasteOffX, mPasteOffY, mPasteOffX + mWidth, mPasteOffY + mHeight); |
| } |
| |
| private static RectF calcBounds(float[] xy) { |
| float minx = xy[0], miny = xy[1]; |
| float maxx = xy[0], maxy = xy[1]; |
| for (int i = 0; i < xy.length; i += 2) { |
| minx = Math.min(minx, xy[i]); |
| maxx = Math.max(maxx, xy[i]); |
| miny = Math.min(miny, xy[i + 1]); |
| maxy = Math.max(maxy, xy[i + 1]); |
| } |
| RectF rect = new RectF(); |
| rect.set(minx, miny, maxx, maxy); |
| return rect; |
| } |
| |
| |
| |
| } |