1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.ide.eclipse.gltrace; 18 19 import com.android.ide.eclipse.gltrace.GLProtoBuf.GLMessage; 20 21 import org.eclipse.swt.graphics.Image; 22 import org.eclipse.swt.graphics.ImageData; 23 import org.eclipse.swt.graphics.PaletteData; 24 import org.eclipse.swt.widgets.Display; 25 import org.liblzf.CLZF; 26 27 /** Utilities to deal with protobuf encoded {@link GLMessage}. */ 28 public class ProtoBufUtils { getImageData(GLMessage glMsg)29 private static ImageData getImageData(GLMessage glMsg) { 30 int width = glMsg.getFb().getWidth(); 31 int height = glMsg.getFb().getHeight(); 32 33 if (width * height == 0) { 34 return null; 35 } 36 37 byte[] compressed = glMsg.getFb().getContents(0).toByteArray(); 38 byte[] uncompressed = new byte[width * height * 4]; 39 40 int size = CLZF.lzf_decompress(compressed, compressed.length, 41 uncompressed, uncompressed.length); 42 assert size == width * height * 4 : "Unexpected image size after decompression."; 43 44 int redMask = 0xff000000; 45 int greenMask = 0x00ff0000; 46 int blueMask = 0x0000ff00; 47 PaletteData palette = new PaletteData(redMask, greenMask, blueMask); 48 ImageData imageData = new ImageData( 49 width, 50 height, 51 32, // depth 52 palette, 53 1, // scan line padding 54 uncompressed); 55 byte[] alpha = new byte[width*height]; 56 for (int i = 0; i < width * height; i++) { 57 alpha[i] = uncompressed[i * 4 + 3]; 58 } 59 imageData.alphaData = alpha; 60 61 imageData = imageData.scaledTo(imageData.width, -imageData.height); 62 return imageData; 63 } 64 65 /** Obtains the image stored in provided protocol buffer message. */ getImage(Display display, GLMessage glMsg)66 public static Image getImage(Display display, GLMessage glMsg) { 67 if (!glMsg.hasFb()) { 68 return null; 69 } 70 71 ImageData imageData = null; 72 try { 73 imageData = getImageData(glMsg); 74 } catch (Exception e) { 75 GlTracePlugin.getDefault().logMessage( 76 "Unexpected error while retrieving framebuffer image: " + e); 77 return null; 78 } 79 80 if (imageData == null) { 81 return null; 82 } 83 84 return new Image(display, imageData); 85 } 86 } 87