2 * Copyright (C) 2012 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 package com.android.gallery3d.filtershow.imageshow;
19 import android.content.Context;
20 import android.content.res.Resources;
21 import android.graphics.Bitmap;
22 import android.graphics.Canvas;
23 import android.graphics.Color;
24 import android.graphics.Matrix;
25 import android.graphics.Paint;
26 import android.graphics.Point;
27 import android.graphics.Rect;
28 import android.graphics.RectF;
29 import android.util.AttributeSet;
30 import android.view.GestureDetector;
31 import android.view.GestureDetector.OnDoubleTapListener;
32 import android.view.GestureDetector.OnGestureListener;
33 import android.view.MotionEvent;
34 import android.view.ScaleGestureDetector;
35 import android.view.View;
36 import android.widget.LinearLayout;
38 import com.android.gallery3d.R;
39 import com.android.gallery3d.filtershow.FilterShowActivity;
40 import com.android.gallery3d.filtershow.cache.ImageLoader;
41 import com.android.gallery3d.filtershow.filters.ImageFilter;
42 import com.android.gallery3d.filtershow.pipeline.ImagePreset;
43 import com.android.gallery3d.filtershow.tools.SaveImage;
47 public class ImageShow extends View implements OnGestureListener,
48 ScaleGestureDetector.OnScaleGestureListener,
51 private static final String LOGTAG = "ImageShow";
52 private static final boolean ENABLE_ZOOMED_COMPARISON = false;
54 protected Paint mPaint = new Paint();
55 protected int mTextSize;
56 protected int mTextPadding;
58 protected int mBackgroundColor;
60 private GestureDetector mGestureDetector = null;
61 private ScaleGestureDetector mScaleGestureDetector = null;
63 protected Rect mImageBounds = new Rect();
64 private boolean mOriginalDisabled = false;
65 private boolean mTouchShowOriginal = false;
66 private long mTouchShowOriginalDate = 0;
67 private final long mTouchShowOriginalDelayMin = 200; // 200ms
68 private int mShowOriginalDirection = 0;
69 private static int UNVEIL_HORIZONTAL = 1;
70 private static int UNVEIL_VERTICAL = 2;
72 private Point mTouchDown = new Point();
73 private Point mTouch = new Point();
74 private boolean mFinishedScalingOperation = false;
76 private int mOriginalTextMargin;
77 private int mOriginalTextSize;
78 private String mOriginalText;
79 private boolean mZoomIn = false;
80 Point mOriginalTranslation = new Point();
82 float mStartFocusX, mStartFocusY;
83 private enum InteractionMode {
88 InteractionMode mInteractionMode = InteractionMode.NONE;
90 protected GeometryMetadata getGeometry() {
91 return new GeometryMetadata(getImagePreset().getGeometry());
94 private FilterShowActivity mActivity = null;
96 public FilterShowActivity getActivity() {
100 public boolean hasModifications() {
101 return MasterImage.getImage().hasModifications();
104 public void resetParameter() {
105 // TODO: implement reset
108 public void onNewValue(int parameter) {
112 public ImageShow(Context context, AttributeSet attrs, int defStyle) {
113 super(context, attrs, defStyle);
114 setupImageShow(context);
117 public ImageShow(Context context, AttributeSet attrs) {
118 super(context, attrs);
119 setupImageShow(context);
123 public ImageShow(Context context) {
125 setupImageShow(context);
128 private void setupImageShow(Context context) {
129 Resources res = context.getResources();
130 mTextSize = res.getDimensionPixelSize(R.dimen.photoeditor_text_size);
131 mTextPadding = res.getDimensionPixelSize(R.dimen.photoeditor_text_padding);
132 mOriginalTextMargin = res.getDimensionPixelSize(R.dimen.photoeditor_original_text_margin);
133 mOriginalTextSize = res.getDimensionPixelSize(R.dimen.photoeditor_original_text_size);
134 mBackgroundColor = res.getColor(R.color.background_screen);
135 mOriginalText = res.getString(R.string.original_picture_text);
136 setupGestureDetector(context);
137 mActivity = (FilterShowActivity) context;
138 MasterImage.getImage().addObserver(this);
141 public void setupGestureDetector(Context context) {
142 mGestureDetector = new GestureDetector(context, this);
143 mScaleGestureDetector = new ScaleGestureDetector(context, this);
147 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
148 int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
149 int parentHeight = MeasureSpec.getSize(heightMeasureSpec);
150 setMeasuredDimension(parentWidth, parentHeight);
153 public ImageFilter getCurrentFilter() {
154 return MasterImage.getImage().getCurrentFilter();
157 public Rect getImageBounds() {
158 Rect dst = new Rect();
159 getImagePreset().getGeometry().getPhotoBounds().roundOut(dst);
163 public Rect getImageCropBounds() {
164 return GeometryMath.roundNearest(getImagePreset().getGeometry().getPreviewCropBounds());
167 /* consider moving the following 2 methods into a subclass */
169 * This function calculates a Image to Screen Transformation matrix
171 * @param reflectRotation set true if you want the rotation encoded
172 * @return Image to Screen transformation matrix
174 protected Matrix getImageToScreenMatrix(boolean reflectRotation) {
175 GeometryMetadata geo = getImagePreset().getGeometry();
177 || MasterImage.getImage().getOriginalBounds() == null) {
180 Matrix m = geo.getOriginalToScreen(reflectRotation,
181 MasterImage.getImage().getOriginalBounds().width(),
182 MasterImage.getImage().getOriginalBounds().height(), getWidth(), getHeight());
183 Point translate = MasterImage.getImage().getTranslation();
184 float scaleFactor = MasterImage.getImage().getScaleFactor();
185 m.postTranslate(translate.x, translate.y);
186 m.postScale(scaleFactor, scaleFactor, getWidth() / 2.0f, getHeight() / 2.0f);
191 * This function calculates a to Screen Image Transformation matrix
193 * @param reflectRotation set true if you want the rotation encoded
194 * @return Screen to Image transformation matrix
196 protected Matrix getScreenToImageMatrix(boolean reflectRotation) {
197 Matrix m = getImageToScreenMatrix(reflectRotation);
198 Matrix invert = new Matrix();
203 public ImagePreset getImagePreset() {
204 return MasterImage.getImage().getPreset();
208 public void onDraw(Canvas canvas) {
209 MasterImage.getImage().setImageShowSize(getWidth(), getHeight());
211 float cx = canvas.getWidth()/2.0f;
212 float cy = canvas.getHeight()/2.0f;
213 float scaleFactor = MasterImage.getImage().getScaleFactor();
214 Point translation = MasterImage.getImage().getTranslation();
216 Matrix scalingMatrix = new Matrix();
217 scalingMatrix.postScale(scaleFactor, scaleFactor, cx, cy);
218 scalingMatrix.preTranslate(translation.x, translation.y);
220 RectF unscaledClipRect = new RectF(mImageBounds);
221 scalingMatrix.mapRect(unscaledClipRect, unscaledClipRect);
225 boolean enablePartialRendering = false;
227 // For now, partial rendering is disabled for all filters,
228 // so no need to clip.
229 if (enablePartialRendering && !unscaledClipRect.isEmpty()) {
230 canvas.clipRect(unscaledClipRect);
234 // TODO: center scale on gesture
235 canvas.scale(scaleFactor, scaleFactor, cx, cy);
236 canvas.translate(translation.x, translation.y);
237 drawImage(canvas, getFilteredImage(), true);
238 Bitmap highresPreview = MasterImage.getImage().getHighresImage();
239 if (highresPreview != null) {
240 drawImage(canvas, highresPreview, false);
244 Bitmap partialPreview = MasterImage.getImage().getPartialImage();
245 if (partialPreview != null) {
246 Rect src = new Rect(0, 0, partialPreview.getWidth(), partialPreview.getHeight());
247 Rect dest = new Rect(0, 0, getWidth(), getHeight());
248 canvas.drawBitmap(partialPreview, src, dest, mPaint);
252 canvas.scale(scaleFactor, scaleFactor, cx, cy);
253 canvas.translate(translation.x, translation.y);
254 drawPartialImage(canvas, getGeometryOnlyImage());
260 public void resetImageCaches(ImageShow caller) {
261 MasterImage.getImage().updatePresets(true);
264 public Bitmap getFiltersOnlyImage() {
265 return MasterImage.getImage().getFiltersOnlyImage();
268 public Bitmap getGeometryOnlyImage() {
269 return MasterImage.getImage().getGeometryOnlyImage();
272 public Bitmap getFilteredImage() {
273 return MasterImage.getImage().getFilteredImage();
276 public void drawImage(Canvas canvas, Bitmap image, boolean updateBounds) {
278 Rect s = new Rect(0, 0, image.getWidth(),
281 float scale = GeometryMath.scale(image.getWidth(), image.getHeight(), getWidth(),
284 float w = image.getWidth() * scale;
285 float h = image.getHeight() * scale;
286 float ty = (getHeight() - h) / 2.0f;
287 float tx = (getWidth() - w) / 2.0f;
289 Rect d = new Rect((int) tx, (int) ty, (int) (w + tx),
294 canvas.drawBitmap(image, s, d, mPaint);
298 public void drawPartialImage(Canvas canvas, Bitmap image) {
299 boolean showsOriginal = MasterImage.getImage().showsOriginal();
300 if (!showsOriginal && !mTouchShowOriginal)
304 if (mShowOriginalDirection == 0) {
305 if (Math.abs(mTouch.y - mTouchDown.y) > Math.abs(mTouch.x - mTouchDown.x)) {
306 mShowOriginalDirection = UNVEIL_VERTICAL;
308 mShowOriginalDirection = UNVEIL_HORIZONTAL;
314 if (mShowOriginalDirection == UNVEIL_VERTICAL) {
315 px = mImageBounds.width();
316 py = mTouch.y - mImageBounds.top;
318 px = mTouch.x - mImageBounds.left;
319 py = mImageBounds.height();
321 px = mImageBounds.width();
325 Rect d = new Rect(mImageBounds.left, mImageBounds.top,
326 mImageBounds.left + px, mImageBounds.top + py);
328 drawImage(canvas, image, false);
329 Paint paint = new Paint();
330 paint.setColor(Color.BLACK);
331 paint.setStrokeWidth(3);
333 if (mShowOriginalDirection == UNVEIL_VERTICAL) {
334 canvas.drawLine(mImageBounds.left, mTouch.y,
335 mImageBounds.right, mTouch.y, paint);
337 canvas.drawLine(mTouch.x, mImageBounds.top,
338 mTouch.x, mImageBounds.bottom, paint);
341 Rect bounds = new Rect();
342 paint.setAntiAlias(true);
343 paint.setTextSize(mOriginalTextSize);
344 paint.getTextBounds(mOriginalText, 0, mOriginalText.length(), bounds);
345 paint.setColor(Color.BLACK);
346 paint.setStyle(Paint.Style.STROKE);
347 paint.setStrokeWidth(3);
348 canvas.drawText(mOriginalText, mImageBounds.left + mOriginalTextMargin,
349 mImageBounds.top + bounds.height() + mOriginalTextMargin, paint);
350 paint.setStyle(Paint.Style.FILL);
351 paint.setStrokeWidth(1);
352 paint.setColor(Color.WHITE);
353 canvas.drawText(mOriginalText, mImageBounds.left + mOriginalTextMargin,
354 mImageBounds.top + bounds.height() + mOriginalTextMargin, paint);
359 public void bindAsImageLoadListener() {
360 MasterImage.getImage().addListener(this);
363 private void imageSizeChanged(Bitmap image) {
364 if (image == null || getImagePreset() == null)
366 float w = image.getWidth();
367 float h = image.getHeight();
368 GeometryMetadata geo = getImagePreset().getGeometry();
369 RectF pb = geo.getPhotoBounds();
370 if (w == pb.width() && h == pb.height()) {
373 RectF r = new RectF(0, 0, w, h);
374 geo.setPhotoBounds(r);
375 geo.setCropBounds(r);
376 getImagePreset().setGeometry(geo);
379 public void updateImage() {
381 Bitmap bitmap = MasterImage.getImage().getOriginalBitmapLarge();
382 if (bitmap != null) {
383 imageSizeChanged(bitmap);
387 public void imageLoaded() {
392 public void saveImage(FilterShowActivity filterShowActivity, File file) {
393 SaveImage.saveImage(getImagePreset(), filterShowActivity, file);
397 public boolean scaleInProgress() {
398 return mScaleGestureDetector.isInProgress();
402 public boolean onTouchEvent(MotionEvent event) {
403 super.onTouchEvent(event);
404 int action = event.getAction();
405 action = action & MotionEvent.ACTION_MASK;
407 mGestureDetector.onTouchEvent(event);
408 boolean scaleInProgress = scaleInProgress();
409 mScaleGestureDetector.onTouchEvent(event);
410 if (mInteractionMode == InteractionMode.SCALE) {
413 if (!scaleInProgress() && scaleInProgress) {
414 // If we were scaling, the scale will stop but we will
415 // still issue an ACTION_UP. Let the subclasses know.
416 mFinishedScalingOperation = true;
419 int ex = (int) event.getX();
420 int ey = (int) event.getY();
421 if (action == MotionEvent.ACTION_DOWN) {
422 mInteractionMode = InteractionMode.MOVE;
425 mTouchShowOriginalDate = System.currentTimeMillis();
426 mShowOriginalDirection = 0;
427 MasterImage.getImage().setOriginalTranslation(MasterImage.getImage().getTranslation());
430 if (action == MotionEvent.ACTION_MOVE && mInteractionMode == InteractionMode.MOVE) {
434 float scaleFactor = MasterImage.getImage().getScaleFactor();
435 if (scaleFactor > 1 && (!ENABLE_ZOOMED_COMPARISON || event.getPointerCount() == 2)) {
436 float translateX = (mTouch.x - mTouchDown.x) / scaleFactor;
437 float translateY = (mTouch.y - mTouchDown.y) / scaleFactor;
438 Point originalTranslation = MasterImage.getImage().getOriginalTranslation();
439 Point translation = MasterImage.getImage().getTranslation();
440 translation.x = (int) (originalTranslation.x + translateX);
441 translation.y = (int) (originalTranslation.y + translateY);
442 constrainTranslation(translation, scaleFactor);
443 MasterImage.getImage().setTranslation(translation);
444 mTouchShowOriginal = false;
445 } else if (enableComparison() && !mOriginalDisabled
446 && (System.currentTimeMillis() - mTouchShowOriginalDate
447 > mTouchShowOriginalDelayMin)
448 && event.getPointerCount() == 1) {
449 mTouchShowOriginal = true;
453 if (action == MotionEvent.ACTION_UP) {
454 mInteractionMode = InteractionMode.NONE;
455 mTouchShowOriginal = false;
460 if (MasterImage.getImage().getScaleFactor() <= 1) {
461 MasterImage.getImage().setScaleFactor(1);
462 MasterImage.getImage().resetTranslation();
469 protected boolean enableComparison() {
474 public boolean onDoubleTap(MotionEvent arg0) {
478 scale = MasterImage.getImage().getMaxScaleFactor();
480 if (scale != MasterImage.getImage().getScaleFactor()) {
481 MasterImage.getImage().setScaleFactor(scale);
482 float translateX = (getWidth() / 2 - arg0.getX());
483 float translateY = (getHeight() / 2 - arg0.getY());
484 Point translation = MasterImage.getImage().getTranslation();
485 translation.x = (int) (mOriginalTranslation.x + translateX);
486 translation.y = (int) (mOriginalTranslation.y + translateY);
487 constrainTranslation(translation, scale);
488 MasterImage.getImage().setTranslation(translation);
494 private void constrainTranslation(Point translation, float scale) {
495 float maxTranslationX = getWidth() / scale;
496 float maxTranslationY = getHeight() / scale;
497 if (Math.abs(translation.x) > maxTranslationX) {
498 translation.x = (int) (Math.signum(translation.x) *
500 if (Math.abs(translation.y) > maxTranslationY) {
501 translation.y = (int) (Math.signum(translation.y) *
509 public boolean onDoubleTapEvent(MotionEvent arg0) {
514 public boolean onSingleTapConfirmed(MotionEvent arg0) {
519 public boolean onDown(MotionEvent arg0) {
524 public boolean onFling(MotionEvent startEvent, MotionEvent endEvent, float arg2, float arg3) {
525 if (mActivity == null) {
528 if (endEvent.getPointerCount() == 2) {
535 public void onLongPress(MotionEvent arg0) {
539 public boolean onScroll(MotionEvent arg0, MotionEvent arg1, float arg2, float arg3) {
544 public void onShowPress(MotionEvent arg0) {
548 public boolean onSingleTapUp(MotionEvent arg0) {
552 public boolean useUtilityPanel() {
556 public void openUtilityPanel(final LinearLayout accessoryViewList) {
560 public boolean onScale(ScaleGestureDetector detector) {
561 MasterImage img = MasterImage.getImage();
562 float scaleFactor = img.getScaleFactor();
564 scaleFactor = scaleFactor * detector.getScaleFactor();
565 if (scaleFactor > MasterImage.getImage().getMaxScaleFactor()) {
566 scaleFactor = MasterImage.getImage().getMaxScaleFactor();
568 if (scaleFactor < 0.5) {
571 MasterImage.getImage().setScaleFactor(scaleFactor);
572 scaleFactor = img.getScaleFactor();
573 float focusx = detector.getFocusX();
574 float focusy = detector.getFocusY();
575 float translateX = (focusx - mStartFocusX) / scaleFactor;
576 float translateY = (focusy - mStartFocusY) / scaleFactor;
577 Point translation = MasterImage.getImage().getTranslation();
578 translation.x = (int) (mOriginalTranslation.x + translateX);
579 translation.y = (int) (mOriginalTranslation.y + translateY);
580 constrainTranslation(translation, scaleFactor);
581 MasterImage.getImage().setTranslation(translation);
588 public boolean onScaleBegin(ScaleGestureDetector detector) {
589 Point pos = MasterImage.getImage().getTranslation();
590 mOriginalTranslation.x = pos.x;
591 mOriginalTranslation.y = pos.y;
592 mOriginalScale = MasterImage.getImage().getScaleFactor();
593 mStartFocusX = detector.getFocusX();
594 mStartFocusY = detector.getFocusY();
595 mInteractionMode = InteractionMode.SCALE;
600 public void onScaleEnd(ScaleGestureDetector detector) {
601 mInteractionMode = InteractionMode.NONE;
602 if (MasterImage.getImage().getScaleFactor() < 1) {
603 MasterImage.getImage().setScaleFactor(1);
608 public boolean didFinishScalingOperation() {
609 if (mFinishedScalingOperation) {
610 mFinishedScalingOperation = false;