diff options
Diffstat (limited to 'src/com/android/gallery3d/filtershow/imageshow/ImageCrop.java')
| -rw-r--r-- | src/com/android/gallery3d/filtershow/imageshow/ImageCrop.java | 307 |
1 files changed, 307 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/filtershow/imageshow/ImageCrop.java b/src/com/android/gallery3d/filtershow/imageshow/ImageCrop.java new file mode 100644 index 000000000..7fee03188 --- /dev/null +++ b/src/com/android/gallery3d/filtershow/imageshow/ImageCrop.java @@ -0,0 +1,307 @@ +/* + * Copyright (C) 2013 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.imageshow; + +import android.content.Context; +import android.content.res.Resources; +import android.graphics.Bitmap; +import android.graphics.Canvas; +import android.graphics.Matrix; +import android.graphics.Paint; +import android.graphics.RectF; +import android.graphics.drawable.Drawable; +import android.util.AttributeSet; +import android.util.Log; +import android.view.MotionEvent; + +import com.android.gallery3d.R; +import com.android.gallery3d.filtershow.crop.CropDrawingUtils; +import com.android.gallery3d.filtershow.crop.CropMath; +import com.android.gallery3d.filtershow.crop.CropObject; +import com.android.gallery3d.filtershow.editors.EditorCrop; +import com.android.gallery3d.filtershow.filters.FilterCropRepresentation; +import com.android.gallery3d.filtershow.imageshow.GeometryMathUtils.GeometryHolder; + +public class ImageCrop extends ImageShow { + private static final String TAG = ImageCrop.class.getSimpleName(); + private RectF mImageBounds = new RectF(); + private RectF mScreenCropBounds = new RectF(); + private Paint mPaint = new Paint(); + private CropObject mCropObj = null; + private GeometryHolder mGeometry = new GeometryHolder(); + private GeometryHolder mUpdateHolder = new GeometryHolder(); + private Drawable mCropIndicator; + private int mIndicatorSize; + private boolean mMovingBlock = false; + private Matrix mDisplayMatrix = null; + private Matrix mDisplayCropMatrix = null; + private Matrix mDisplayMatrixInverse = null; + private float mPrevX = 0; + private float mPrevY = 0; + private int mMinSideSize = 90; + private int mTouchTolerance = 40; + private enum Mode { + NONE, MOVE + } + private Mode mState = Mode.NONE; + private boolean mValidDraw = false; + FilterCropRepresentation mLocalRep = new FilterCropRepresentation(); + EditorCrop mEditorCrop; + + public ImageCrop(Context context) { + super(context); + setup(context); + } + + public ImageCrop(Context context, AttributeSet attrs) { + super(context, attrs); + setup(context); + } + + public ImageCrop(Context context, AttributeSet attrs, int defStyle) { + super(context, attrs, defStyle); + setup(context); + } + + private void setup(Context context) { + Resources rsc = context.getResources(); + mCropIndicator = rsc.getDrawable(R.drawable.camera_crop); + mIndicatorSize = (int) rsc.getDimension(R.dimen.crop_indicator_size); + mMinSideSize = (int) rsc.getDimension(R.dimen.crop_min_side); + mTouchTolerance = (int) rsc.getDimension(R.dimen.crop_touch_tolerance); + } + + public void setFilterCropRepresentation(FilterCropRepresentation crop) { + mLocalRep = (crop == null) ? new FilterCropRepresentation() : crop; + GeometryMathUtils.initializeHolder(mUpdateHolder, mLocalRep); + mValidDraw = true; + } + + public FilterCropRepresentation getFinalRepresentation() { + return mLocalRep; + } + + private void internallyUpdateLocalRep(RectF crop, RectF image) { + FilterCropRepresentation + .findNormalizedCrop(crop, (int) image.width(), (int) image.height()); + mGeometry.crop.set(crop); + mUpdateHolder.set(mGeometry); + mLocalRep.setCrop(crop); + } + + @Override + public boolean onTouchEvent(MotionEvent event) { + float x = event.getX(); + float y = event.getY(); + if (mDisplayMatrix == null || mDisplayMatrixInverse == null) { + return true; + } + float[] touchPoint = { + x, y + }; + mDisplayMatrixInverse.mapPoints(touchPoint); + x = touchPoint[0]; + y = touchPoint[1]; + switch (event.getActionMasked()) { + case (MotionEvent.ACTION_DOWN): + if (mState == Mode.NONE) { + if (!mCropObj.selectEdge(x, y)) { + mMovingBlock = mCropObj.selectEdge(CropObject.MOVE_BLOCK); + } + mPrevX = x; + mPrevY = y; + mState = Mode.MOVE; + } + break; + case (MotionEvent.ACTION_UP): + if (mState == Mode.MOVE) { + mCropObj.selectEdge(CropObject.MOVE_NONE); + mMovingBlock = false; + mPrevX = x; + mPrevY = y; + mState = Mode.NONE; + internallyUpdateLocalRep(mCropObj.getInnerBounds(), mCropObj.getOuterBounds()); + } + break; + case (MotionEvent.ACTION_MOVE): + if (mState == Mode.MOVE) { + float dx = x - mPrevX; + float dy = y - mPrevY; + mCropObj.moveCurrentSelection(dx, dy); + mPrevX = x; + mPrevY = y; + } + break; + default: + break; + } + invalidate(); + return true; + } + + private void clearDisplay() { + mDisplayMatrix = null; + mDisplayMatrixInverse = null; + invalidate(); + } + + public void applyFreeAspect() { + mCropObj.unsetAspectRatio(); + invalidate(); + } + + public void applyOriginalAspect() { + RectF outer = mCropObj.getOuterBounds(); + float w = outer.width(); + float h = outer.height(); + if (w > 0 && h > 0) { + applyAspect(w, h); + mCropObj.resetBoundsTo(outer, outer); + internallyUpdateLocalRep(mCropObj.getInnerBounds(), mCropObj.getOuterBounds()); + } else { + Log.w(TAG, "failed to set aspect ratio original"); + } + invalidate(); + } + + public void applyAspect(float x, float y) { + if (x <= 0 || y <= 0) { + throw new IllegalArgumentException("Bad arguments to applyAspect"); + } + // If we are rotated by 90 degrees from horizontal, swap x and y + if (GeometryMathUtils.needsDimensionSwap(mGeometry.rotation)) { + float tmp = x; + x = y; + y = tmp; + } + if (!mCropObj.setInnerAspectRatio(x, y)) { + Log.w(TAG, "failed to set aspect ratio"); + } + internallyUpdateLocalRep(mCropObj.getInnerBounds(), mCropObj.getOuterBounds()); + invalidate(); + } + + /** + * Rotates first d bits in integer x to the left some number of times. + */ + private int bitCycleLeft(int x, int times, int d) { + int mask = (1 << d) - 1; + int mout = x & mask; + times %= d; + int hi = mout >> (d - times); + int low = (mout << times) & mask; + int ret = x & ~mask; + ret |= low; + ret |= hi; + return ret; + } + + /** + * Find the selected edge or corner in screen coordinates. + */ + private int decode(int movingEdges, float rotation) { + int rot = CropMath.constrainedRotation(rotation); + switch (rot) { + case 90: + return bitCycleLeft(movingEdges, 1, 4); + case 180: + return bitCycleLeft(movingEdges, 2, 4); + case 270: + return bitCycleLeft(movingEdges, 3, 4); + default: + return movingEdges; + } + } + + private void forceStateConsistency() { + MasterImage master = MasterImage.getImage(); + Bitmap image = master.getFiltersOnlyImage(); + int width = image.getWidth(); + int height = image.getHeight(); + if (mCropObj == null || !mUpdateHolder.equals(mGeometry) + || mImageBounds.width() != width || mImageBounds.height() != height + || !mLocalRep.getCrop().equals(mUpdateHolder.crop)) { + mImageBounds.set(0, 0, width, height); + mGeometry.set(mUpdateHolder); + mLocalRep.setCrop(mUpdateHolder.crop); + RectF scaledCrop = new RectF(mUpdateHolder.crop); + FilterCropRepresentation.findScaledCrop(scaledCrop, width, height); + mCropObj = new CropObject(mImageBounds, scaledCrop, (int) mUpdateHolder.straighten); + mState = Mode.NONE; + clearDisplay(); + } + } + + @Override + protected void onSizeChanged(int w, int h, int oldw, int oldh) { + super.onSizeChanged(w, h, oldw, oldh); + clearDisplay(); + } + + @Override + public void onDraw(Canvas canvas) { + Bitmap bitmap = MasterImage.getImage().getFiltersOnlyImage(); + if (!mValidDraw || bitmap == null) { + return; + } + forceStateConsistency(); + mImageBounds.set(0, 0, bitmap.getWidth(), bitmap.getHeight()); + // If display matrix doesn't exist, create it and its dependencies + if (mDisplayCropMatrix == null || mDisplayMatrix == null || mDisplayMatrixInverse == null) { + mDisplayMatrix = GeometryMathUtils.getFullGeometryToScreenMatrix(mGeometry, + bitmap.getWidth(), bitmap.getHeight(), canvas.getWidth(), canvas.getHeight()); + float straighten = mGeometry.straighten; + mGeometry.straighten = 0; + mDisplayCropMatrix = GeometryMathUtils.getFullGeometryToScreenMatrix(mGeometry, + bitmap.getWidth(), bitmap.getHeight(), canvas.getWidth(), canvas.getHeight()); + mGeometry.straighten = straighten; + mDisplayMatrixInverse = new Matrix(); + mDisplayMatrixInverse.reset(); + if (!mDisplayCropMatrix.invert(mDisplayMatrixInverse)) { + Log.w(TAG, "could not invert display matrix"); + mDisplayMatrixInverse = null; + return; + } + // Scale min side and tolerance by display matrix scale factor + mCropObj.setMinInnerSideSize(mDisplayMatrixInverse.mapRadius(mMinSideSize)); + mCropObj.setTouchTolerance(mDisplayMatrixInverse.mapRadius(mTouchTolerance)); + } + // Draw actual bitmap + mPaint.reset(); + mPaint.setAntiAlias(true); + mPaint.setFilterBitmap(true); + canvas.drawBitmap(bitmap, mDisplayMatrix, mPaint); + mCropObj.getInnerBounds(mScreenCropBounds); + RectF outer = mCropObj.getOuterBounds(); + FilterCropRepresentation.findNormalizedCrop(mScreenCropBounds, (int) outer.width(), + (int) outer.height()); + FilterCropRepresentation.findScaledCrop(mScreenCropBounds, bitmap.getWidth(), + bitmap.getHeight()); + if (mDisplayCropMatrix.mapRect(mScreenCropBounds)) { + // Draw crop rect and markers + CropDrawingUtils.drawCropRect(canvas, mScreenCropBounds); + CropDrawingUtils.drawRuleOfThird(canvas, mScreenCropBounds); + CropDrawingUtils.drawIndicators(canvas, mCropIndicator, mIndicatorSize, + mScreenCropBounds, mCropObj.isFixedAspect(), + decode(mCropObj.getSelectState(), mGeometry.rotation.value())); + } + } + + public void setEditor(EditorCrop editorCrop) { + mEditorCrop = editorCrop; + } +} |