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This is a backport of OpenJFX 8 to run on Java 7.
The newest version!
/*
* Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.javafx.iio.bmp;
import com.sun.javafx.iio.*;
import com.sun.javafx.iio.common.*;
import java.io.*;
import java.nio.ByteBuffer;
final class BMPDescriptor extends ImageDescriptor {
static final String formatName = "BMP";
static final String extensions[] = { "bmp" };
static final Signature signatures[] = {new Signature((byte)0x42, (byte)0x4D)};
static final ImageDescriptor theInstance = new BMPDescriptor();
private BMPDescriptor() {
super(formatName, extensions, signatures);
}
}
// the difference of LEInputStream from DataInputStream is Endianness
final class LEInputStream {
final public InputStream in;
LEInputStream(InputStream is) {
in = is;
}
public final short readShort() throws IOException {
int ch1 = in.read();
int ch2 = in.read();
if ((ch1 | ch2) < 0) {
throw new EOFException();
}
return (short)((ch2 << 8) + ch1);
}
public final int readInt() throws IOException {
int ch1 = in.read();
int ch2 = in.read();
int ch3 = in.read();
int ch4 = in.read();
if ((ch1 | ch2 | ch3 | ch4) < 0) {
throw new EOFException();
}
return ((ch4 << 24) + (ch3 << 16) + (ch2 << 8) + ch1);
}
public final void skipBytes(int n) throws IOException {
int m = (int)in.skip(n);
if (m < n) {
throw new EOFException();
}
}
}
final class BitmapInfoHeader {
static final int BIH_SIZE = 40;
static final int BIH4_SIZE = 108;
static final int BIH5_SIZE = 124;
final int biSize;
final int biWidth;
final int biHeight;
final short biPlanes;
final short biBitCount;
final int biCompression;
final int biSizeImage;
final int biXPelsPerMeter;
final int biYPelsPerMeter;
final int biClrUsed;
final int biClrImportant;
BitmapInfoHeader(LEInputStream data) throws IOException {
biSize = data.readInt();
biWidth = data.readInt();
biHeight = data.readInt();
biPlanes = data.readShort();
biBitCount = data.readShort();
biCompression = data.readInt();
biSizeImage = data.readInt();
biXPelsPerMeter = data.readInt();
biYPelsPerMeter = data.readInt();
biClrUsed = data.readInt();
biClrImportant = data.readInt();
if (biSize > BIH_SIZE) {
if (biSize == BIH4_SIZE || biSize == BIH5_SIZE) {
data.skipBytes(biSize - BIH_SIZE);
} else {
throw new IOException("BitmapInfoHeader is corrupt");
}
}
validate();
}
void validate() {
if (biCompression != 0 || biPlanes != 1 || biBitCount != 24) {
throw new RuntimeException(
"Unsupported BMP image: " +
"only 24 bit uncompressed BMP`s is supported");
}
}
}
final class BMPImageLoader extends ImageLoaderImpl {
static final short BM = 0x4D42;
static final int BFH_SIZE = 14;
final LEInputStream data;
short bfType; // must be equal to BM
int bfSize;
int bfOffBits;
int bgra_palette[];
BitmapInfoHeader bih;
BMPImageLoader(InputStream input) throws IOException {
super(BMPDescriptor.theInstance);
data = new LEInputStream(input);
bfType = data.readShort();
if (isValid()) {
readHeader();
}
}
private void readHeader() throws IOException {
bfSize = data.readInt();
data.skipBytes(4); // 32 bits reserved
bfOffBits = data.readInt();
bih = new BitmapInfoHeader(data);
if (bih.biSize + BFH_SIZE != bfOffBits) {
data.skipBytes(bfOffBits - bih.biSize - BFH_SIZE);
}
}
private boolean isValid() {
return bfType == BM;
}
public void dispose() { }
static void GBRtoRGB(byte data[], int pos, int size) {
for (int sz = size / 3; sz != 0; --sz) {
byte x = data[pos], y = data[pos + 2];
data[pos + 2] = x; data[pos] = y;
pos += 3;
}
}
public ImageFrame load(int imageIndex, int width, int height,
boolean preserveAspectRatio, boolean smooth) throws IOException
{
if (0 != imageIndex) {
return null;
}
if ((width > 0 && width != bih.biWidth) ||
(height > 0 && height != bih.biHeight))
{
throw new RuntimeException("scaling for BMP is not supported");
}
// Pass image metadata to any listeners.
ImageMetadata imageMetadata = new ImageMetadata(null, Boolean.TRUE,
null, null, null, null, bih.biWidth, bih.biHeight,
null, null, null);
updateImageMetadata(imageMetadata);
int bmpStride = (bih.biBitCount*bih.biWidth/8 + 3) & ~3;
int rowLength = (bih.biBitCount/8)*bih.biWidth;
int hght = Math.abs(bih.biHeight);
byte image[] = new byte[rowLength * hght];
for (int i = 0; i != hght; ++i) {
int line = bih.biHeight < 0 ? i : hght-i-1;
int nRead = data.in.read(image, line * rowLength, rowLength);
GBRtoRGB(image, line * rowLength, nRead);
if (nRead != rowLength) {
break;
}
if (nRead < bmpStride) {
data.skipBytes(bmpStride-nRead);
}
}
return new ImageFrame(ImageStorage.ImageType.RGB, ByteBuffer.wrap(image),
bih.biWidth, hght, rowLength, null, null);
}
}
public final class BMPImageLoaderFactory implements ImageLoaderFactory {
private static final BMPImageLoaderFactory theInstance =
new BMPImageLoaderFactory();
public static ImageLoaderFactory getInstance() {
return theInstance;
}
public ImageFormatDescription getFormatDescription() {
return BMPDescriptor.theInstance;
}
public ImageLoader createImageLoader(InputStream input) throws IOException {
return new BMPImageLoader(input);
}
}