1f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin/* 2f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * Copyright (C) 2010 The Android Open Source Project 3f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * 4f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * Licensed under the Apache License, Version 2.0 (the "License"); 5f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * you may not use this file except in compliance with the License. 6f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * You may obtain a copy of the License at 7f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * 8f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * http://www.apache.org/licenses/LICENSE-2.0 9f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * 10f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * Unless required by applicable law or agreed to in writing, software 11f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * distributed under the License is distributed on an "AS IS" BASIS, 12f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * See the License for the specific language governing permissions and 14f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * limitations under the License. 15f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin */ 16f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 17a4eae1abb4f2547dfbda84301ee764ce35464881John Reckpackage com.android.gallery3d.glrenderer; 18f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 19f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport android.graphics.Bitmap; 20f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport android.graphics.Canvas; 21f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport android.graphics.Color; 22f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport android.graphics.Paint.FontMetricsInt; 23f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport android.graphics.Typeface; 24f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport android.text.TextPaint; 25f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport android.text.TextUtils; 262b3ee0ea07246b859a5b75d8a6102a7cce7ec838Owen Linimport android.util.FloatMath; 27f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 28f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin// StringTexture is a texture shows the content of a specified String. 29f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin// 30f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin// To create a StringTexture, use the newInstance() method and specify 31f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin// the String, the font size, and the color. 32a4eae1abb4f2547dfbda84301ee764ce35464881John Reckpublic class StringTexture extends CanvasTexture { 33f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final String mText; 34f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final TextPaint mPaint; 35f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final FontMetricsInt mMetrics; 36f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 37f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private StringTexture(String text, TextPaint paint, 38f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin FontMetricsInt metrics, int width, int height) { 39f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin super(width, height); 40f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mText = text; 41f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mPaint = paint; 42f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mMetrics = metrics; 43f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 44f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 45f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public static TextPaint getDefaultPaint(float textSize, int color) { 46f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin TextPaint paint = new TextPaint(); 47f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin paint.setTextSize(textSize); 48f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin paint.setAntiAlias(true); 49f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin paint.setColor(color); 50f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin paint.setShadowLayer(2f, 0f, 0f, Color.BLACK); 51f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return paint; 52f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 53f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 54f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public static StringTexture newInstance( 55f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin String text, float textSize, int color) { 56f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return newInstance(text, getDefaultPaint(textSize, color)); 57f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 58f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 59f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public static StringTexture newInstance( 609201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang String text, float textSize, int color, 61f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin float lengthLimit, boolean isBold) { 62f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin TextPaint paint = getDefaultPaint(textSize, color); 63f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (isBold) { 64f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin paint.setTypeface(Typeface.defaultFromStyle(Typeface.BOLD)); 65f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 666b891c6a3739f8c49d42f9db6fc76cb92c7c5f25Chih-Chung Chang if (lengthLimit > 0) { 676b891c6a3739f8c49d42f9db6fc76cb92c7c5f25Chih-Chung Chang text = TextUtils.ellipsize( 686b891c6a3739f8c49d42f9db6fc76cb92c7c5f25Chih-Chung Chang text, paint, lengthLimit, TextUtils.TruncateAt.END).toString(); 696b891c6a3739f8c49d42f9db6fc76cb92c7c5f25Chih-Chung Chang } 70f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return newInstance(text, paint); 71f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 72f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 73f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private static StringTexture newInstance(String text, TextPaint paint) { 74f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin FontMetricsInt metrics = paint.getFontMetricsInt(); 75fd91413ab46e2960803a33652025aebe3e05f2d9Chih-Chung Chang int width = (int) FloatMath.ceil(paint.measureText(text)); 76f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int height = metrics.bottom - metrics.top; 77f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // The texture size needs to be at least 1x1. 78f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (width <= 0) width = 1; 79f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (height <= 0) height = 1; 80f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return new StringTexture(text, paint, metrics, width, height); 81f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 82f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 83f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 84f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin protected void onDraw(Canvas canvas, Bitmap backing) { 85f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin canvas.translate(0, -mMetrics.ascent); 86f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin canvas.drawText(mText, 0, 0, mPaint); 87f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 88f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin} 89