/* * 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.example.android.apis.graphics.spritetext;import javax.microedition.khronos.opengles.GL10;import android.graphics.Paint;public class NumericSprite {    public NumericSprite() {        mText = "";        mLabelMaker = null;    }    public void initialize(GL10 gl, Paint paint) {        int height = roundUpPower2((int) paint.getFontSpacing());        final float interDigitGaps = 9 * 1.0f;        int width = roundUpPower2((int) (interDigitGaps + paint.measureText(sStrike)));        mLabelMaker = new LabelMaker(true, width, height);        mLabelMaker.initialize(gl);        mLabelMaker.beginAdding(gl);        for (int i = 0; i < 10; i++) {            String digit = sStrike.substring(i, i+1);            mLabelId[i] = mLabelMaker.add(gl, digit, paint);            mWidth[i] = (int) Math.ceil(mLabelMaker.getWidth(i));        }        mLabelMaker.endAdding(gl);    }    public void shutdown(GL10 gl) {        mLabelMaker.shutdown(gl);        mLabelMaker = null;    }    /**     * Find the smallest power of two >= the input value.     * (Doesn't work for negative numbers.)     */    private int roundUpPower2(int x) {        x = x - 1;        x = x | (x >> 1);        x = x | (x >> 2);        x = x | (x >> 4);        x = x | (x >> 8);        x = x | (x >>16);        return x + 1;    }    public void setValue(int value) {        mText = format(value);    }    public void draw(GL10 gl, float x, float y,            float viewWidth, float viewHeight) {        int length = mText.length();        mLabelMaker.beginDrawing(gl, viewWidth, viewHeight);        for(int i = 0; i < length; i++) {            char c = mText.charAt(i);            int digit = c - '0';            mLabelMaker.draw(gl, x, y, mLabelId[digit]);            x += mWidth[digit];        }        mLabelMaker.endDrawing(gl);    }    public float width() {        float width = 0.0f;        int length = mText.length();        for(int i = 0; i < length; i++) {            char c = mText.charAt(i);            width += mWidth[c - '0'];        }        return width;    }    private String format(int value) {        return Integer.toString(value);    }    private LabelMaker mLabelMaker;    private String mText;    private int[] mWidth = new int[10];    private int[] mLabelId = new int[10];    private final static String sStrike = "0123456789";}