/telephony/java/com/android/internal/telephony/cat/IconLoader.java
http://github.com/CyanogenMod/android_frameworks_base · Java · 362 lines · 250 code · 37 blank · 75 comment · 45 complexity · f43e9572f49d924837bef035b6ad5fe9 MD5 · raw file
- /*
- * Copyright (C) 2006 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.internal.telephony.cat;
- import com.android.internal.telephony.IccFileHandler;
- import android.graphics.Bitmap;
- import android.graphics.Color;
- import android.os.AsyncResult;
- import android.os.Handler;
- import android.os.HandlerThread;
- import android.os.Looper;
- import android.os.Message;
- import android.util.Log;
- import java.util.HashMap;
- /**
- * Class for loading icons from the SIM card. Has two states: single, for loading
- * one icon. Multi, for loading icons list.
- *
- */
- class IconLoader extends Handler {
- // members
- private int mState = STATE_SINGLE_ICON;
- private ImageDescriptor mId = null;
- private Bitmap mCurrentIcon = null;
- private int mRecordNumber;
- private IccFileHandler mSimFH = null;
- private Message mEndMsg = null;
- private byte[] mIconData = null;
- // multi icons state members
- private int[] mRecordNumbers = null;
- private int mCurrentRecordIndex = 0;
- private Bitmap[] mIcons = null;
- private HashMap<Integer, Bitmap> mIconsCache = null;
- private static IconLoader sLoader = null;
- // Loader state values.
- private static final int STATE_SINGLE_ICON = 1;
- private static final int STATE_MULTI_ICONS = 2;
- // Finished loading single record from a linear-fixed EF-IMG.
- private static final int EVENT_READ_EF_IMG_RECOED_DONE = 1;
- // Finished loading single icon from a Transparent DF-Graphics.
- private static final int EVENT_READ_ICON_DONE = 2;
- // Finished loading single colour icon lookup table.
- private static final int EVENT_READ_CLUT_DONE = 3;
- // Color lookup table offset inside the EF.
- private static final int CLUT_LOCATION_OFFSET = 4;
- // CLUT entry size, {Red, Green, Black}
- private static final int CLUT_ENTRY_SIZE = 3;
- private IconLoader(Looper looper , IccFileHandler fh) {
- super(looper);
- mSimFH = fh;
- mIconsCache = new HashMap<Integer, Bitmap>(50);
- }
- static IconLoader getInstance(Handler caller, IccFileHandler fh) {
- if (sLoader != null) {
- return sLoader;
- }
- if (fh != null) {
- HandlerThread thread = new HandlerThread("Cat Icon Loader");
- thread.start();
- return new IconLoader(thread.getLooper(), fh);
- }
- return null;
- }
- void loadIcons(int[] recordNumbers, Message msg) {
- if (recordNumbers == null || recordNumbers.length == 0 || msg == null) {
- return;
- }
- mEndMsg = msg;
- // initialize multi icons load variables.
- mIcons = new Bitmap[recordNumbers.length];
- mRecordNumbers = recordNumbers;
- mCurrentRecordIndex = 0;
- mState = STATE_MULTI_ICONS;
- startLoadingIcon(recordNumbers[0]);
- }
- void loadIcon(int recordNumber, Message msg) {
- if (msg == null) {
- return;
- }
- mEndMsg = msg;
- mState = STATE_SINGLE_ICON;
- startLoadingIcon(recordNumber);
- }
- private void startLoadingIcon(int recordNumber) {
- // Reset the load variables.
- mId = null;
- mIconData = null;
- mCurrentIcon = null;
- mRecordNumber = recordNumber;
- // make sure the icon was not already loaded and saved in the local cache.
- if (mIconsCache.containsKey(recordNumber)) {
- mCurrentIcon = mIconsCache.get(recordNumber);
- postIcon();
- return;
- }
- // start the first phase ==> loading Image Descriptor.
- readId();
- }
- @Override
- public void handleMessage(Message msg) {
- AsyncResult ar;
- try {
- switch (msg.what) {
- case EVENT_READ_EF_IMG_RECOED_DONE:
- ar = (AsyncResult) msg.obj;
- if (handleImageDescriptor((byte[]) ar.result)) {
- readIconData();
- } else {
- throw new Exception("Unable to parse image descriptor");
- }
- break;
- case EVENT_READ_ICON_DONE:
- ar = (AsyncResult) msg.obj;
- byte[] rawData = ((byte[]) ar.result);
- if (mId.codingScheme == ImageDescriptor.CODING_SCHEME_BASIC) {
- mCurrentIcon = parseToBnW(rawData, rawData.length);
- mIconsCache.put(mRecordNumber, mCurrentIcon);
- postIcon();
- } else if (mId.codingScheme == ImageDescriptor.CODING_SCHEME_COLOUR) {
- mIconData = rawData;
- readClut();
- }
- break;
- case EVENT_READ_CLUT_DONE:
- ar = (AsyncResult) msg.obj;
- byte [] clut = ((byte[]) ar.result);
- mCurrentIcon = parseToRGB(mIconData, mIconData.length,
- false, clut);
- mIconsCache.put(mRecordNumber, mCurrentIcon);
- postIcon();
- break;
- }
- } catch (Exception e) {
- CatLog.d(this, "Icon load failed");
- // post null icon back to the caller.
- postIcon();
- }
- }
- /**
- * Handles Image descriptor parsing and required processing. This is the
- * first step required to handle retrieving icons from the SIM.
- *
- * @param data byte [] containing Image Instance descriptor as defined in
- * TS 51.011.
- */
- private boolean handleImageDescriptor(byte[] rawData) {
- mId = ImageDescriptor.parse(rawData, 1);
- if (mId == null) {
- return false;
- }
- return true;
- }
- // Start reading colour lookup table from SIM card.
- private void readClut() {
- int length = mIconData[3] * CLUT_ENTRY_SIZE;
- Message msg = this.obtainMessage(EVENT_READ_CLUT_DONE);
- mSimFH.loadEFImgTransparent(mId.imageId,
- mIconData[CLUT_LOCATION_OFFSET],
- mIconData[CLUT_LOCATION_OFFSET + 1], length, msg);
- }
- // Start reading Image Descriptor from SIM card.
- private void readId() {
- if (mRecordNumber < 0) {
- mCurrentIcon = null;
- postIcon();
- return;
- }
- Message msg = this.obtainMessage(EVENT_READ_EF_IMG_RECOED_DONE);
- mSimFH.loadEFImgLinearFixed(mRecordNumber, msg);
- }
- // Start reading icon bytes array from SIM card.
- private void readIconData() {
- Message msg = this.obtainMessage(EVENT_READ_ICON_DONE);
- mSimFH.loadEFImgTransparent(mId.imageId, 0, 0, mId.length ,msg);
- }
- // When all is done pass icon back to caller.
- private void postIcon() {
- if (mState == STATE_SINGLE_ICON) {
- mEndMsg.obj = mCurrentIcon;
- mEndMsg.sendToTarget();
- } else if (mState == STATE_MULTI_ICONS) {
- mIcons[mCurrentRecordIndex++] = mCurrentIcon;
- // If not all icons were loaded, start loading the next one.
- if (mCurrentRecordIndex < mRecordNumbers.length) {
- startLoadingIcon(mRecordNumbers[mCurrentRecordIndex]);
- } else {
- mEndMsg.obj = mIcons;
- mEndMsg.sendToTarget();
- }
- }
- }
- /**
- * Convert a TS 131.102 image instance of code scheme '11' into Bitmap
- * @param data The raw data
- * @param length The length of image body
- * @return The bitmap
- */
- public static Bitmap parseToBnW(byte[] data, int length){
- int valueIndex = 0;
- int width = data[valueIndex++] & 0xFF;
- int height = data[valueIndex++] & 0xFF;
- int numOfPixels = width*height;
- int[] pixels = new int[numOfPixels];
- int pixelIndex = 0;
- int bitIndex = 7;
- byte currentByte = 0x00;
- while (pixelIndex < numOfPixels) {
- // reassign data and index for every byte (8 bits).
- if (pixelIndex % 8 == 0) {
- currentByte = data[valueIndex++];
- bitIndex = 7;
- }
- pixels[pixelIndex++] = bitToBnW((currentByte >> bitIndex-- ) & 0x01);
- }
- if (pixelIndex != numOfPixels) {
- CatLog.d("IconLoader", "parseToBnW; size error");
- }
- return Bitmap.createBitmap(pixels, width, height, Bitmap.Config.ARGB_8888);
- }
- /**
- * Decode one bit to a black and white color:
- * 0 is black
- * 1 is white
- * @param bit to decode
- * @return RGB color
- */
- private static int bitToBnW(int bit){
- if(bit == 1){
- return Color.WHITE;
- } else {
- return Color.BLACK;
- }
- }
- /**
- * a TS 131.102 image instance of code scheme '11' into color Bitmap
- *
- * @param data The raw data
- * @param length the length of image body
- * @param transparency with or without transparency
- * @param clut coulor lookup table
- * @return The color bitmap
- */
- public static Bitmap parseToRGB(byte[] data, int length,
- boolean transparency, byte[] clut) {
- int valueIndex = 0;
- int width = data[valueIndex++] & 0xFF;
- int height = data[valueIndex++] & 0xFF;
- int bitsPerImg = data[valueIndex++] & 0xFF;
- int numOfClutEntries = data[valueIndex++] & 0xFF;
- if (true == transparency) {
- clut[numOfClutEntries - 1] = Color.TRANSPARENT;
- }
- int numOfPixels = width * height;
- int[] pixels = new int[numOfPixels];
- valueIndex = 6;
- int pixelIndex = 0;
- int bitsStartOffset = 8 - bitsPerImg;
- int bitIndex = bitsStartOffset;
- byte currentByte = data[valueIndex++];
- int mask = getMask(bitsPerImg);
- boolean bitsOverlaps = (8 % bitsPerImg == 0);
- while (pixelIndex < numOfPixels) {
- // reassign data and index for every byte (8 bits).
- if (bitIndex < 0) {
- currentByte = data[valueIndex++];
- bitIndex = bitsOverlaps ? (bitsStartOffset) : (bitIndex * -1);
- }
- int clutEntry = ((currentByte >> bitIndex) & mask);
- int clutIndex = clutEntry * CLUT_ENTRY_SIZE;
- pixels[pixelIndex++] = Color.rgb(clut[clutIndex],
- clut[clutIndex + 1], clut[clutIndex + 2]);
- bitIndex -= bitsPerImg;
- }
- return Bitmap.createBitmap(pixels, width, height,
- Bitmap.Config.ARGB_8888);
- }
- /**
- * Calculate bit mask for a given number of bits. The mask should enable to
- * make a bitwise and to the given number of bits.
- * @param numOfBits number of bits to calculate mask for.
- * @return bit mask
- */
- private static int getMask(int numOfBits) {
- int mask = 0x00;
- switch (numOfBits) {
- case 1:
- mask = 0x01;
- break;
- case 2:
- mask = 0x03;
- break;
- case 3:
- mask = 0x07;
- break;
- case 4:
- mask = 0x0F;
- break;
- case 5:
- mask = 0x1F;
- break;
- case 6:
- mask = 0x3F;
- break;
- case 7:
- mask = 0x7F;
- break;
- case 8:
- mask = 0xFF;
- break;
- }
- return mask;
- }
- }