The Tor Browser / file comparison
comparison: build/mobile/robocop/PaintedSurface.java
build/mobile/robocop/PaintedSurface.java
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 3 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 package org.mozilla.gecko; | |
| 6 | |
| 7 import java.io.ByteArrayOutputStream; | |
| 8 import java.io.File; | |
| 9 import java.io.FileInputStream; | |
| 10 import java.nio.MappedByteBuffer; | |
| 11 import java.nio.channels.FileChannel; | |
| 12 | |
| 13 import android.graphics.Bitmap; | |
| 14 import android.util.Base64; | |
| 15 import android.util.Base64OutputStream; | |
| 16 | |
| 17 public class PaintedSurface { | |
| 18 private String mFileName; | |
| 19 private int mWidth; | |
| 20 private int mHeight; | |
| 21 private FileInputStream mPixelFile; | |
| 22 private MappedByteBuffer mPixelBuffer; | |
| 23 | |
| 24 public PaintedSurface(String filename, int width, int height) { | |
| 25 mFileName = filename; | |
| 26 mWidth = width; | |
| 27 mHeight = height; | |
| 28 | |
| 29 try { | |
| 30 File f = new File(filename); | |
| 31 int pixelSize = (int)f.length(); | |
| 32 | |
| 33 mPixelFile = new FileInputStream(filename); | |
| 34 mPixelBuffer = mPixelFile.getChannel().map(FileChannel.MapMode.READ_ONLY, 0, pixelSize); | |
| 35 } catch (java.io.FileNotFoundException e) { | |
| 36 FennecNativeDriver.log(FennecNativeDriver.LogLevel.ERROR, e); | |
| 37 } catch (java.io.IOException e) { | |
| 38 FennecNativeDriver.log(FennecNativeDriver.LogLevel.ERROR, e); | |
| 39 } | |
| 40 } | |
| 41 | |
| 42 public final int getWidth() { | |
| 43 return mWidth; | |
| 44 } | |
| 45 | |
| 46 public final int getHeight() { | |
| 47 return mHeight; | |
| 48 } | |
| 49 | |
| 50 private int pixelAtIndex(int index) { | |
| 51 int b1 = mPixelBuffer.get(index) & 0xFF; | |
| 52 int b2 = mPixelBuffer.get(index + 1) & 0xFF; | |
| 53 int b3 = mPixelBuffer.get(index + 2) & 0xFF; | |
| 54 int b4 = mPixelBuffer.get(index + 3) & 0xFF; | |
| 55 int value = (b1 << 24) + (b2 << 16) + (b3 << 8) + (b4 << 0); | |
| 56 return value; | |
| 57 } | |
| 58 | |
| 59 public final int getPixelAt(int x, int y) { | |
| 60 if (mPixelBuffer == null) { | |
| 61 throw new RoboCopException("Trying to access PaintedSurface with no active PixelBuffer"); | |
| 62 } | |
| 63 | |
| 64 if (x >= mWidth || x < 0) { | |
| 65 throw new RoboCopException("Trying to access PaintedSurface with invalid x value"); | |
| 66 } | |
| 67 | |
| 68 if (y >= mHeight || y < 0) { | |
| 69 throw new RoboCopException("Trying to access PaintedSurface with invalid y value"); | |
| 70 } | |
| 71 | |
| 72 // The rows are reversed so row 0 is at the end and we start with the last row. | |
| 73 // This is why we do mHeight-y; | |
| 74 int index = (x + ((mHeight - y - 1) * mWidth)) * 4; | |
| 75 return pixelAtIndex(index); | |
| 76 } | |
| 77 | |
| 78 public final String asDataUri() { | |
| 79 try { | |
| 80 Bitmap bm = Bitmap.createBitmap(mWidth, mHeight, Bitmap.Config.ARGB_8888); | |
| 81 for (int y = 0; y < mHeight; y++) { | |
| 82 for (int x = 0; x < mWidth; x++) { | |
| 83 int index = (x + ((mHeight - y - 1) * mWidth)) * 4; | |
| 84 bm.setPixel(x, y, pixelAtIndex(index)); | |
| 85 } | |
| 86 } | |
| 87 ByteArrayOutputStream out = new ByteArrayOutputStream(); | |
| 88 out.write("data:image/png;base64,".getBytes()); | |
| 89 Base64OutputStream b64 = new Base64OutputStream(out, Base64.NO_WRAP); | |
| 90 bm.compress(Bitmap.CompressFormat.PNG, 100, b64); | |
| 91 return new String(out.toByteArray()); | |
| 92 } catch (Exception e) { | |
| 93 FennecNativeDriver.log(FennecNativeDriver.LogLevel.ERROR, e); | |
| 94 throw new RoboCopException("Unable to convert surface to a PNG data:uri"); | |
| 95 } | |
| 96 } | |
| 97 | |
| 98 public void close() { | |
| 99 try { | |
| 100 mPixelFile.close(); | |
| 101 } catch (Exception e) { | |
| 102 FennecNativeDriver.log(FennecNativeDriver.LogLevel.DEBUG, e); | |
| 103 } | |
| 104 } | |
| 105 } |
