| /* |
| * 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 com.android.launcher; |
| |
| import android.graphics.drawable.BitmapDrawable; |
| import android.graphics.drawable.Drawable; |
| import android.graphics.drawable.PaintDrawable; |
| import android.graphics.Bitmap; |
| import android.graphics.PixelFormat; |
| import android.graphics.Canvas; |
| import android.graphics.PaintFlagsDrawFilter; |
| import android.graphics.Paint; |
| import android.graphics.Rect; |
| import android.util.DisplayMetrics; |
| import android.content.res.Resources; |
| import android.content.Context; |
| |
| /** |
| * Various utilities shared amongst the Launcher's classes. |
| */ |
| final class Utilities { |
| private static int sIconWidth = -1; |
| private static int sIconHeight = -1; |
| |
| private static final Paint sPaint = new Paint(); |
| private static final Rect sBounds = new Rect(); |
| private static final Rect sOldBounds = new Rect(); |
| private static 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; |
| } |
| |
| /** |
| * Returns a Drawable representing the thumbnail of the specified Drawable. |
| * The size of the thumbnail is defined by the dimension |
| * android.R.dimen.launcher_application_icon_size. |
| * |
| * This method is not thread-safe and should be invoked on the UI thread only. |
| * |
| * @param icon The icon to get a thumbnail of. |
| * @param context The application's context. |
| * |
| * @return A thumbnail for the specified icon or the icon itself if the |
| * thumbnail could not be created. |
| */ |
| static Drawable createIconThumbnail(Drawable icon, Context context) { |
| if (sIconWidth == -1) { |
| final Resources resources = context.getResources(); |
| sIconWidth = sIconHeight = (int) resources.getDimension(android.R.dimen.app_icon_size); |
| } |
| |
| int width = sIconWidth; |
| int height = sIconHeight; |
| |
| float scale = 1.0f; |
| 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 iconWidth = icon.getIntrinsicWidth(); |
| int iconHeight = icon.getIntrinsicHeight(); |
| |
| if (width > 0 && height > 0) { |
| if (width < iconWidth || height < iconHeight || scale != 1.0f) { |
| final float ratio = (float) iconWidth / iconHeight; |
| |
| if (iconWidth > iconHeight) { |
| height = (int) (width / ratio); |
| } else if (iconHeight > iconWidth) { |
| width = (int) (height * ratio); |
| } |
| |
| final Bitmap.Config c = icon.getOpacity() != PixelFormat.OPAQUE ? |
| Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565; |
| final Bitmap thumb = Bitmap.createBitmap(sIconWidth, sIconHeight, c); |
| final Canvas canvas = sCanvas; |
| canvas.setBitmap(thumb); |
| // Copy the old bounds to restore them later |
| // If we were to do oldBounds = icon.getBounds(), |
| // the call to setBounds() that follows would |
| // change the same instance and we would lose the |
| // old bounds |
| sOldBounds.set(icon.getBounds()); |
| final int x = (sIconWidth - width) / 2; |
| final int y = (sIconHeight - height) / 2; |
| icon.setBounds(x, y, x + width, y + height); |
| icon.draw(canvas); |
| icon.setBounds(sOldBounds); |
| icon = new FastBitmapDrawable(thumb); |
| } else if (iconWidth < width && iconHeight < height) { |
| final Bitmap.Config c = Bitmap.Config.ARGB_8888; |
| final Bitmap thumb = Bitmap.createBitmap(sIconWidth, sIconHeight, c); |
| final Canvas canvas = sCanvas; |
| canvas.setBitmap(thumb); |
| sOldBounds.set(icon.getBounds()); |
| final int x = (width - iconWidth) / 2; |
| final int y = (height - iconHeight) / 2; |
| icon.setBounds(x, y, x + iconWidth, y + iconHeight); |
| icon.draw(canvas); |
| icon.setBounds(sOldBounds); |
| icon = new FastBitmapDrawable(thumb); |
| } |
| } |
| |
| return icon; |
| } |
| |
| /** |
| * 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. |
| * |
| * This method is not thread-safe and should be invoked on the UI thread only. |
| * |
| * @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 createBitmapThumbnail(Bitmap bitmap, Context context) { |
| if (sIconWidth == -1) { |
| final Resources resources = context.getResources(); |
| sIconWidth = sIconHeight = (int) resources.getDimension( |
| android.R.dimen.app_icon_size); |
| } |
| |
| int width = sIconWidth; |
| int height = sIconHeight; |
| |
| final int bitmapWidth = bitmap.getWidth(); |
| final int bitmapHeight = bitmap.getHeight(); |
| |
| if (width > 0 && height > 0 && (width < bitmapWidth || height < bitmapHeight)) { |
| final float ratio = (float) bitmapWidth / bitmapHeight; |
| |
| if (bitmapWidth > bitmapHeight) { |
| height = (int) (width / ratio); |
| } else if (bitmapHeight > bitmapWidth) { |
| width = (int) (height * ratio); |
| } |
| |
| final Bitmap.Config c = (width == sIconWidth && height == sIconHeight) ? |
| bitmap.getConfig() : Bitmap.Config.ARGB_8888; |
| final Bitmap thumb = Bitmap.createBitmap(sIconWidth, sIconHeight, c); |
| final Canvas canvas = sCanvas; |
| final Paint paint = sPaint; |
| canvas.setBitmap(thumb); |
| paint.setDither(false); |
| paint.setFilterBitmap(true); |
| sBounds.set((sIconWidth - width) / 2, (sIconHeight - height) / 2, width, height); |
| sOldBounds.set(0, 0, bitmapWidth, bitmapHeight); |
| canvas.drawBitmap(bitmap, sOldBounds, sBounds, paint); |
| return thumb; |
| } |
| |
| return bitmap; |
| } |
| } |