gecko/build/mobile/robocop/PaintedSurface.java.in

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#filter substitution
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
package @ANDROID_PACKAGE_NAME@;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
public class PaintedSurface {
private String mFileName;
private int mWidth;
private int mHeight;
private FileInputStream mPixelFile;
private MappedByteBuffer mPixelBuffer;
public PaintedSurface(String filename, int width, int height) {
mFileName = filename;
mWidth = width;
mHeight = height;
try {
File f = new File(filename);
int pixelSize = (int)f.length();
mPixelFile = new FileInputStream(filename);
mPixelBuffer = mPixelFile.getChannel().map(FileChannel.MapMode.READ_ONLY, 0, pixelSize);
} catch (java.io.FileNotFoundException e) {
FennecNativeDriver.log(FennecNativeDriver.LogLevel.ERROR, e);
} catch (java.io.IOException e) {
FennecNativeDriver.log(FennecNativeDriver.LogLevel.ERROR, e);
}
}
public final int getWidth() {
return mWidth;
}
public final int getHeight() {
return mHeight;
}
public final int getPixelAt(int x, int y) {
if (mPixelBuffer == null) {
throw new RoboCopException("Trying to access PaintedSurface with no active PixelBuffer");
}
if (x >= mWidth || x < 0) {
throw new RoboCopException("Trying to access PaintedSurface with invalid x value");
}
if (y >= mHeight || y < 0) {
throw new RoboCopException("Trying to access PaintedSurface with invalid y value");
}
// The rows are reversed so row 0 is at the end and we start with the last row.
// This is why we do mHeight-y;
int index = (x + ((mHeight - y - 1) * mWidth)) * 4;
int b1 = mPixelBuffer.get(index) & 0xFF;
int b2 = mPixelBuffer.get(index + 1) & 0xFF;
int b3 = mPixelBuffer.get(index + 2) & 0xFF;
int b4 = mPixelBuffer.get(index + 3) & 0xFF;
int value = (b1 << 24) + (b2 << 16) + (b3 << 8) + (b4 << 0);
return value;
}
public void close() {
try {
mPixelFile.close();
} catch (Exception e) {
FennecNativeDriver.log(FennecNativeDriver.LogLevel.DEBUG, e);
}
}
}