| /* |
| * 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.launcher3; |
| |
| import android.graphics.Bitmap; |
| import android.graphics.Canvas; |
| import android.graphics.ColorFilter; |
| import android.graphics.ColorMatrix; |
| import android.graphics.ColorMatrixColorFilter; |
| import android.graphics.Paint; |
| import android.graphics.PixelFormat; |
| import android.graphics.Rect; |
| import android.graphics.drawable.Drawable; |
| |
| class FastBitmapDrawable extends Drawable { |
| |
| private static final ColorMatrix sTempSaturationMatrix = new ColorMatrix(); |
| private static final ColorMatrix sTempBrightnessMatrix = new ColorMatrix(); |
| |
| private final Paint mPaint = new Paint(Paint.FILTER_BITMAP_FLAG); |
| private Bitmap mBitmap; |
| private int mAlpha; |
| |
| private float mSatutation = 1; |
| private int mBrightness = 0; |
| |
| FastBitmapDrawable(Bitmap b) { |
| mAlpha = 255; |
| mBitmap = b; |
| setBounds(0, 0, b.getWidth(), b.getHeight()); |
| } |
| |
| @Override |
| public void draw(Canvas canvas) { |
| final Rect r = getBounds(); |
| // Draw the bitmap into the bounding rect |
| canvas.drawBitmap(mBitmap, null, r, mPaint); |
| } |
| |
| @Override |
| public void setColorFilter(ColorFilter cf) { |
| // No op |
| } |
| |
| @Override |
| public int getOpacity() { |
| return PixelFormat.TRANSLUCENT; |
| } |
| |
| @Override |
| public void setAlpha(int alpha) { |
| mAlpha = alpha; |
| mPaint.setAlpha(alpha); |
| } |
| |
| @Override |
| public void setFilterBitmap(boolean filterBitmap) { |
| mPaint.setFilterBitmap(filterBitmap); |
| mPaint.setAntiAlias(filterBitmap); |
| } |
| |
| public int getAlpha() { |
| return mAlpha; |
| } |
| |
| @Override |
| public int getIntrinsicWidth() { |
| return getBounds().width(); |
| } |
| |
| @Override |
| public int getIntrinsicHeight() { |
| return getBounds().height(); |
| } |
| |
| @Override |
| public int getMinimumWidth() { |
| return getBounds().width(); |
| } |
| |
| @Override |
| public int getMinimumHeight() { |
| return getBounds().height(); |
| } |
| |
| public Bitmap getBitmap() { |
| return mBitmap; |
| } |
| |
| public float getSaturation() { |
| return mSatutation; |
| } |
| |
| public void setSaturation(float saturation) { |
| mSatutation = saturation; |
| updateFilter(); |
| } |
| |
| public int getBrightness() { |
| return mBrightness; |
| } |
| |
| public void addBrightness(int amount) { |
| mBrightness += amount; |
| updateFilter(); |
| } |
| |
| public void setBrightness(int brightness) { |
| mBrightness = brightness; |
| updateFilter(); |
| } |
| |
| private void updateFilter() { |
| if (mSatutation != 1 || mBrightness != 0) { |
| sTempSaturationMatrix.setSaturation(mSatutation); |
| |
| if (mBrightness != 0) { |
| // Brightness: C-new = C-old*(1-amount) + amount |
| float scale = 1 - mBrightness / 255.0f; |
| sTempBrightnessMatrix.setScale(scale, scale, scale, 1); |
| float[] array = sTempBrightnessMatrix.getArray(); |
| |
| // Add the amount to RGB components of the matrix, as per the above formula. |
| // Fifth elements in the array correspond to the constant being added to |
| // red, blue, green, and alpha channel respectively. |
| array[4] = mBrightness; |
| array[9] = mBrightness; |
| array[14] = mBrightness; |
| sTempSaturationMatrix.preConcat(sTempBrightnessMatrix); |
| } |
| mPaint.setColorFilter(new ColorMatrixColorFilter(sTempSaturationMatrix)); |
| } else { |
| mPaint.setColorFilter(null); |
| } |
| } |
| } |