/*
* Copyright (C) 2008 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 cn.walcl.ulauncher;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BlurMaskFilter;
import android.graphics.Canvas;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Paint;
import android.graphics.PaintFlagsDrawFilter;
import android.graphics.PorterDuff;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Typeface;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.PaintDrawable;
import android.text.StaticLayout;
import android.text.TextPaint;
import android.text.Layout.Alignment;
import android.util.DisplayMetrics;
import android.util.Log;
/**
* Various utilities shared amongst the Launcher's classes.
*/
public final class Utilities {
private static final boolean TEXT_BURN = false;
private static int sIconWidth = -1;
private static int sIconHeight = -1;
private static int sIconTextureWidth = -1;
private static int sIconTextureHeight = -1;
private static final Paint sBlurPaint = new Paint();
private static final Paint sGlowColorPressedPaint = new Paint();
private static final Paint sGlowColorFocusedPaint = new Paint();
private static final Paint sDisabledPaint = new Paint();
private static final Rect sOldBounds = new Rect();
private static final Canvas sCanvas = new Canvas();
static {
sCanvas.setDrawFilter(new PaintFlagsDrawFilter(Paint.DITHER_FLAG,
Paint.FILTER_BITMAP_FLAG));
}
static Bitmap centerToFit(Bitmap bitmap, int width, int height, Context context) {
final int bitmapWidth = bitmap.getWidth();
final int bitmapHeight = bitmap.getHeight();
if (bitmapWidth < width || bitmapHeight < height) {
int color = context.getResources().getColor(R.color.window_background);
Bitmap centered = Bitmap.createBitmap(bitmapWidth < width ? width : bitmapWidth,
bitmapHeight < height ? height : bitmapHeight, Bitmap.Config.RGB_565);
centered.setDensity(bitmap.getDensity());
Canvas canvas = new Canvas(centered);
canvas.drawColor(color);
canvas.drawBitmap(bitmap, (width - bitmapWidth) / 2.0f, (height - bitmapHeight) / 2.0f,
null);
bitmap = centered;
}
return bitmap;
}
static int sColors[] = { 0xffff0000, 0xff00ff00, 0xff0000ff };
static int sColorIndex = 0;
/**
* Returns a bitmap suitable for the all apps view. The bitmap will be a power
* of two sized ARGB_8888 bitmap that can be used as a gl texture.
*/
public static Bitmap createIconBitmap(Drawable icon, Context context) {
synchronized (sCanvas) { // we share the statics :-(
if (sIconWidth == -1) {
initStatics(context);
}
int width = sIconWidth;
int height = sIconHeight;
if (icon instanceof PaintDrawable) {
PaintDrawable painter = (PaintDrawable) icon;
painter.setIntrinsicWidth(width);
painter.setIntrinsicHeight(height);
} else if (icon instanceof BitmapDrawable) {
// Ensure the bitmap has a density.
BitmapDrawable bitmapDrawable = (BitmapDrawable) icon;
Bitmap bitmap = bitmapDrawable.getBitmap();
if (bitmap.getDensity() == Bitmap.DENSITY_NONE) {
bitmapDrawable.setTargetDensity(context.getResources().getDisplayMetrics());
}
}
int sourceWidth = icon.getIntrinsicWidth();
int sourceHeight = icon.getIntrinsicHeight();
if (sourceWidth > 0 && sourceWidth > 0) {
// There are intrinsic sizes.
if (width < sourceWidth || height < sourceHeight) {
// It's too big, scale it down.
final float ratio = (float) sourceWidth / sourceHeight;
if (sourceWidth > sourceHeight) {
height = (int) (width / ratio);
} else if (sourceHeight > sourceWidth) {
width = (int) (height * ratio);
}
} else if (sourceWidth < width && sourceHeight < height) {
// It's small, use the size they gave us.
width = sourceWidth;
height = sourceHeight;
}
}
// no intrinsic size --> use default size
int textureWidth = sIconTextureWidth;
int textureHeight = sIconTextureHeight;
final Bitmap bitmap = Bitmap.createBitmap(textureWidth, textureHeight,
Bitmap.Config.ARGB_8888);
final Canvas canvas = sCanvas;
canvas.setBitmap(bitmap);
final int left = (textureWidth-width) / 2;
final int top = (textureHeight-height) / 2;
sOldBounds.set(icon.getBounds());
icon.setBounds(left, top, left+width, top+height);
icon.draw(canvas);
icon.setBounds(sOldBounds);
return bitmap;
}
}
static void drawSelectedAllAppsBitmap(Canvas dest, int destWidth, int destHeight,
boolean pressed, Bitmap src) {
synchronized (sCanvas) { // we share the statics :-(
if (sIconWidth == -1) {
// We can't have gotten to here without src being initialized, which
// comes from this file already. So just assert.
//initStatics(context);
throw new RuntimeException("Assertion failed: Utilities not initialized");
}
dest.drawColor(0, PorterDuff.Mode.CLEAR);
int[] xy = new int[2];
Bitmap mask = src.extractAlpha(sBlurPaint, xy);
float px = (destWidth - src.getWidth()) / 2;
float py = (destHeight - src.getHeight()) / 2;
dest.drawBitmap(mask, px + xy[0], py + xy[1],
pressed ? sGlowColorPressedPaint : sGlowColorFocusedPaint);
mask.recycle();
}
}
/**
* Returns a Bitmap representing the thumbnail of the specified Bitmap.
* The size of the thumbnail is defined by the dimension
* android.R.dimen.launcher_application_icon_size.
*
* @param bitmap The bitmap to get a thumbnail of.
* @param context The application's context.
*
* @return A thumbnail for the specified bitmap or the bitmap itself if the
* thumbnail could not be created.
*/
static Bitmap resampleIconBitmap(Bitmap bitmap, Context context) {
synchronized (sCanvas) { // we share the statics :-(
if (sIconWidth == -1) {
initStatics(context);
}
if (bitmap.getWidth() == sIconWidth && bitmap.getHeight() == sIconHeight) {
return bitmap;
} else {
return createIconBitmap(new BitmapDrawable(bitmap), context);
}
}
}
static Bitmap drawDisabledBitmap(Bitmap bitmap, Context context) {
synchronized (sCanvas) { // we share the statics :-(
if (sIconWidth == -1) {
initStatics(context);
}
final Bitmap disabled = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(),
Bitmap.Config.ARGB_8888);
final Canvas canvas = sCanvas;
canvas.setBitmap(disabled);
canvas.drawBitmap(bitmap, 0.0f, 0.0f, sDisabledPaint);
return disabled;
}
}
private static void initStatics(Context context) {
final Resources resources = context.getResources();
final DisplayMetrics metrics = resources.getDisplayMetrics();
final float density = metrics.density;
sIconWidth = sIconHeight = (int) resources.getDimension(android.R.dimen.app_icon_size);
sIconTextureWidth = sIconTextureHeight = sIconWidth + 2;
sBlurPaint.setMaskFilter(new BlurMaskFilter(5 * density, BlurMaskFilter.Blur.NORMAL));
sGlowColorPressedPaint.setColor(0xffffc300);
//TODO: sGlowColorPressedPaint.setMaskFilter(TableMaskFilter.CreateClipTable(0, 30));
sGlowColorFocusedPaint.setColor(0xffff8e00);
//TODO: sGlowColorFocusedPaint.setMaskFilter(TableMaskFilter.CreateClipTable(0, 30));
ColorMatrix cm = new ColorMatrix();
cm.setSaturation(0.2f);
sDisabledPaint.setColorFilter(new ColorMatrixColorFilter(cm));
sDisabledPaint.setAlpha(0x88);
}
static class BubbleText {
private static final int MAX_LINES = 2;
private final TextPaint mTextPaint;
private final RectF mBubbleRect = new RectF();
private final float mTextWidth;
private final int mLeading;
private final int mFirstLineY;
private final int mLineHeight;
private final int mBitmapWidth;
private final int mBitmapHeight;
private final int mDensity;
BubbleText(Context context) {
final Resources resources = context.getResources();
final DisplayMetrics metrics = resources.getDisplayMetrics();
final float scale = metrics.density;
mDensity = metrics.densityDpi;
final float paddingLeft = 2.0f * scale;
final float paddingRight = 2.0f * scale;
final float cellWidth = resources.getDimension(R.dimen.title_texture_width);
RectF bubbleRect = mBubbleRect;
bubbleRect.left = 0;
bubbleRect.top = 0;
bubbleRect.right = (int) cellWidth;
mTextWidth = cellWidth - paddingLeft - paddingRight;
TextPaint textPaint = mTextPaint = new TextPaint();
textPaint.setTypeface(Typeface.DEFAULT);
textPaint.setTextSize(13*scale);
textPaint.setColor(0xffffffff);
textPaint.setAntiAlias(true);
if (TEXT_BURN) {
textPaint.setShadowLayer(8, 0, 0, 0xff000000);
}
float ascent = -textPaint.ascent();
float descent = textPaint.descent();
float leading = 0.0f;//(ascent+descent) * 0.1f;
mLeading = (int)(leading + 0.5f);
mFirstLineY = (int)(leading + ascent + 0.5f);
mLineHeight = (int)(leading + ascent + descent + 0.5f);
mBitmapWidth = (int)(mBubbleRect.width() + 0.5f);
mBitmapHeight = roundToPow2((int)((MAX_LINES * mLineHeight) + leading + 0.5f));
mBubbleRect.offsetTo((mBitmapWidth-mBubbleRect.width())/2, 0);
}
/** You own the bitmap after this and you must call recycle on it. */
Bitmap createTextBitmap(String text) {
Bitmap b = Bitmap.createBitmap(mBitmapWidth, mBitmapHeight, Bitmap.Config.ALPHA_8);
b.setDensity(mDensity);
Canvas c = new Canvas(b);
StaticLayout layout = new StaticLayout(text, mTextPaint, (int)mTextWidth,
Alignment.ALIGN_CENTER, 1, 0, true);
int lineCount = layout.getLineCount();
if (lineCount > MAX_LINES) {
lineCount = MAX_LINES;
}
//if (!TEXT_BURN && lineCount > 0) {
//RectF bubbleRect = mBubbleRect;
//bubbleRect.bottom = height(lineCount);
//c.drawRoundRect(bubbleRect, mCornerRadius, mCornerRadius, mRectPaint);
//}
for (int i=0; i<lineCount; i++) {
//int x = (int)((mBubbleRect.width() - layout.getLineMax(i)) / 2.0f);
//int y = mFirstLineY + (i * mLineHeight);
final String lineText = text.substring(layout.getLineStart(i), layout.getLineEnd(i));
int x = (int)(mBubbleRect.left
+ ((mBubbleRect.width() - mTextPaint.measureText(lineText)) * 0.5f));
int y = mFirstLineY + (i * mLineHeight);
c.drawText(lineText, x, y, mTextPaint);
}
return b;
}
private int height(int lineCount) {
return (int)((lineCount * mLineHeight) + mLeading + mLeading + 0.0f);
}
int getBubbleWidth() {
return (int)(mBubbleRect.width() + 0.5f);
}
int getMaxBubbleHeight() {
return height(MAX_LINES);
}
int getBitmapWidth() {
return mBitmapWidth;
}
int getBitmapHeight() {
return mBitmapHeight;
}
}
/** Only works for positive numbers. */
static int roundToPow2(int n) {
int orig = n;
n >>= 1;
int mask = 0x8000000;
while (mask != 0 && (n & mask) == 0) {
mask >>= 1;
}
while (mask != 0) {
n |= mask;
mask >>= 1;
}
n += 1;
if (n != orig) {
n <<= 1;
}
return n;
}
public static byte[] flattenBitmap(Bitmap bitmap) {
// Try go guesstimate how much space the icon will take when serialized
// to avoid unnecessary allocations/copies during the write.
int size = bitmap.getWidth() * bitmap.getHeight() * 4;
ByteArrayOutputStream out = new ByteArrayOutputStream(size);
try {
bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
out.flush();
out.close();
return out.toByteArray();
} catch (IOException e) {
Log.w("Favorite", "Could not write icon");
return null;
}
}
}