/*
* 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";
}