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[DO NOT MERGE] legacy icon treatment / circle detection

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Bug: 37357483

Change-Id: I63049ad61ad259f546fcf5077ded0a5f444e4395
This commit is contained in:
Hyunyoung Song
2017-04-16 21:32:20 -07:00
parent 46b3a13528
commit c1cf75716b
7 changed files with 236 additions and 22 deletions
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src/com/android/launcher3/graphics/IconNormalizer.java
+173 -8
View File
@@ -20,15 +20,31 @@ import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.AdaptiveIconDrawable;
import android.graphics.drawable.Drawable;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.Log;
import com.android.launcher3.LauncherAppState;
import com.android.launcher3.Utilities;
import java.io.File;
import java.io.FileOutputStream;
import java.nio.ByteBuffer;
import java.util.Random;
public class IconNormalizer {
private static final String TAG = "IconNormalizer";
private static final boolean DEBUG = false;
// Ratio of icon visible area to full icon size for a square shaped icon
private static final float MAX_SQUARE_AREA_FACTOR = 375.0f / 576;
// Ratio of icon visible area to full icon size for a circular shaped icon
@@ -42,17 +58,36 @@ public class IconNormalizer {
private static final int MIN_VISIBLE_ALPHA = 40;
// Shape detection related constants
private static final float BOUND_RATIO_MARGIN = .05f;
private static final float PIXEL_DIFF_PERCENTAGE_THRESHOLD = 0.005f;
private static final float SCALE_NOT_INITIALIZED = 0;
private static final Object LOCK = new Object();
private static IconNormalizer sIconNormalizer;
private final int mMaxSize;
private final Bitmap mBitmap;
private final Bitmap mBitmapARGB;
private final Canvas mCanvas;
private final Paint mPaintMaskShape;
private final Paint mPaintMaskShapeOutline;
private final byte[] mPixels;
private final int[] mPixelsARGB;
private float mAdaptiveIconScale;
// for each y, stores the position of the leftmost x and the rightmost x
private final float[] mLeftBorder;
private final float[] mRightBorder;
private final Rect mBounds;
private final Matrix mMatrix;
private Paint mPaintIcon;
private Canvas mCanvasARGB;
private File mDir;
private int mFileId;
private Random mRandom;
private IconNormalizer(Context context) {
// Use twice the icon size as maximum size to avoid scaling down twice.
@@ -60,9 +95,121 @@ public class IconNormalizer {
mBitmap = Bitmap.createBitmap(mMaxSize, mMaxSize, Bitmap.Config.ALPHA_8);
mCanvas = new Canvas(mBitmap);
mPixels = new byte[mMaxSize * mMaxSize];
mPixelsARGB = new int[mMaxSize * mMaxSize];
mLeftBorder = new float[mMaxSize];
mRightBorder = new float[mMaxSize];
mBounds = new Rect();
// Needed for isShape() method
mBitmapARGB = Bitmap.createBitmap(mMaxSize, mMaxSize, Bitmap.Config.ARGB_8888);
mCanvasARGB = new Canvas(mBitmapARGB);
mPaintIcon = new Paint();
mPaintIcon.setColor(Color.WHITE);
mPaintMaskShape = new Paint();
mPaintMaskShape.setColor(Color.RED);
mPaintMaskShape.setStyle(Paint.Style.FILL);
mPaintMaskShape.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.XOR));
mPaintMaskShapeOutline = new Paint();
mPaintMaskShapeOutline.setStrokeWidth(2 * context.getResources().getDisplayMetrics().density);
mPaintMaskShapeOutline.setStyle(Paint.Style.STROKE);
mPaintMaskShapeOutline.setColor(Color.BLACK);
mPaintMaskShapeOutline.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));
mMatrix = new Matrix();
int[] mPixels = new int[mMaxSize * mMaxSize];
mAdaptiveIconScale = SCALE_NOT_INITIALIZED;
mDir = context.getExternalFilesDir(null);
mRandom = new Random();
}
/**
* Returns if the shape of the icon is same as the path.
* For this method to work, the shape path bounds should be in [0,1]x[0,1] bounds.
*/
private boolean isShape(Path maskPath) {
// Condition1:
// If width and height of the path not close to a square, then the icon shape is
// not same as the mask shape.
float iconRatio = ((float) mBounds.width()) / mBounds.height();
if (Math.abs(iconRatio - 1) > BOUND_RATIO_MARGIN) {
if (DEBUG) {
Log.d(TAG, "Not same as mask shape because width != height. " + iconRatio);
}
return false;
}
// Condition 2:
// Actual icon (white) and the fitted shape (e.g., circle)(red) XOR operation
// should generate transparent image, if the actual icon is equivalent to the shape.
mFileId = mRandom.nextInt();
mBitmapARGB.eraseColor(Color.TRANSPARENT);
mCanvasARGB.drawBitmap(mBitmap, 0, 0, mPaintIcon);
if (DEBUG) {
final File beforeFile = new File(mDir, "isShape" + mFileId + "_before.png");
try {
mBitmapARGB.compress(Bitmap.CompressFormat.PNG, 100,
new FileOutputStream(beforeFile));
} catch (Exception e) {}
}
// Fit the shape within the icon's bounding box
mMatrix.reset();
mMatrix.setScale(mBounds.width(), mBounds.height());
mMatrix.postTranslate(mBounds.left, mBounds.top);
maskPath.transform(mMatrix);
// XOR operation
mCanvasARGB.drawPath(maskPath, mPaintMaskShape);
// DST_OUT operation around the mask path outline
mCanvasARGB.drawPath(maskPath, mPaintMaskShapeOutline);
boolean isTrans = isTransparentBitmap(mBitmapARGB);
if (DEBUG) {
final File afterFile = new File(mDir, "isShape" + mFileId + "_after_" + isTrans + ".png");
try {
mBitmapARGB.compress(Bitmap.CompressFormat.PNG, 100,
new FileOutputStream(afterFile));
} catch (Exception e) {}
}
// Check if the result is almost transparent
if (!isTrans) {
if (DEBUG) {
Log.d(TAG, "Not same as mask shape");
}
return false;
}
return true;
}
/**
* Used to determine if certain the bitmap is transparent.
*/
private boolean isTransparentBitmap(Bitmap bitmap) {
int w = mBounds.width();
int h = mBounds.height();
bitmap.getPixels(mPixelsARGB, 0 /* the first index to write into the array */,
w /* stride */,
mBounds.left, mBounds.top,
w, h);
int sum = 0;
for (int i = 0; i < w * h; i++) {
if(Color.alpha(mPixelsARGB[i]) > MIN_VISIBLE_ALPHA) {
sum++;
}
}
float percentageDiffPixels = ((float) sum) / (mBounds.width() * mBounds.height());
boolean transparentImage = percentageDiffPixels < PIXEL_DIFF_PERCENTAGE_THRESHOLD;
if (DEBUG) {
Log.d(TAG, "Total # pixel that is different (id="+ mFileId + "):" + percentageDiffPixels + "="+ sum + "/" + mBounds.width() * mBounds.height());
}
return transparentImage;
}
/**
@@ -79,7 +226,15 @@ public class IconNormalizer {
*
* @param outBounds optional rect to receive the fraction distance from each edge.
*/
public synchronized float getScale(Drawable d, RectF outBounds) {
public synchronized float getScale(@NonNull Drawable d, @Nullable RectF outBounds,
@Nullable Path path, @Nullable boolean[] outMaskShape) {
if (Utilities.isAtLeastO() && d instanceof AdaptiveIconDrawable &&
mAdaptiveIconScale != SCALE_NOT_INITIALIZED) {
if (outBounds != null) {
outBounds.set(mBounds);
}
return mAdaptiveIconScale;
}
int width = d.getIntrinsicWidth();
int height = d.getIntrinsicHeight();
if (width <= 0 || height <= 0) {
@@ -169,20 +324,30 @@ public class IconNormalizer {
if (hullByRect < CIRCLE_AREA_BY_RECT) {
scaleRequired = MAX_CIRCLE_AREA_FACTOR;
} else {
scaleRequired = MAX_SQUARE_AREA_FACTOR + LINEAR_SCALE_SLOPE * (1 - hullByRect);
scaleRequired = MAX_SQUARE_AREA_FACTOR + LINEAR_SCALE_SLOPE * (1 - hullByRect);
}
mBounds.left = leftX;
mBounds.right = rightX;
mBounds.top = topY;
mBounds.bottom = bottomY;
if (outBounds != null) {
outBounds.left = ((float) leftX) / width;
outBounds.right = 1 - ((float) rightX) / width;
outBounds.top = ((float) topY) / height;
outBounds.bottom = 1 - ((float) bottomY) / height;
outBounds.set(((float) mBounds.left) / width, ((float) mBounds.top),
1 - ((float) mBounds.right) / width,
1 - ((float) mBounds.bottom) / height);
}
if (outMaskShape != null && outMaskShape.length > 0) {
outMaskShape[0] = isShape(path);
}
float areaScale = area / (width * height);
// Use sqrt of the final ratio as the images is scaled across both width and height.
float scale = areaScale > scaleRequired ? (float) Math.sqrt(scaleRequired / areaScale) : 1;
if (Utilities.isAtLeastO() && d instanceof AdaptiveIconDrawable &&
mAdaptiveIconScale == SCALE_NOT_INITIALIZED) {
mAdaptiveIconScale = scale;
}
return scale;
}