public void read() throws IOException {
if (!isDataRead) {
int expectedLen = 9;
int offset = 0;
if (data.length >= expectedLen) {
majorVersion = data[offset++] & 0xff;
minorVersion = data[offset++] & 0xff;
densityUnit = data[offset++] & 0xff;
xDensity = IOUtils.readUnsignedShortMM(data, offset);
offset += 2;
yDensity = IOUtils.readUnsignedShortMM(data, offset);
offset += 2;
thumbnailWidth = data[offset++] & 0xff;
thumbnailHeight = data[offset] & 0xff;
if (thumbnailWidth != 0 && thumbnailHeight != 0) {
containsThumbnail = true;
// Extract the thumbnail
// Create a Bitmap
int size = 3 * thumbnailWidth * thumbnailHeight;
int[] colors = MetadataUtils.toARGB(ArrayUtils.subArray(data, expectedLen, size));
thumbnail =
new JFIFThumbnail(
Bitmap.createBitmap(
colors, thumbnailWidth, thumbnailHeight, Bitmap.Config.ARGB_8888));
}
}
isDataRead = true;
}
}
/**
* Wraps a BufferedImage inside a Photoshop _8BIM
*
* @param thumbnail input thumbnail image
* @return a Photoshop _8BMI
* @throws IOException
*/
public static _8BIM createThumbnail8BIM(Bitmap thumbnail) throws IOException {
// Create memory buffer to write data
ByteArrayOutputStream bout = new ByteArrayOutputStream();
// Compress the thumbnail
try {
thumbnail.compress(Bitmap.CompressFormat.JPEG, 100, bout);
} catch (Exception e) {
e.printStackTrace();
}
byte[] data = bout.toByteArray();
bout.reset();
// Write thumbnail format
IOUtils.writeIntMM(bout, 1); // 1 = kJpegRGB. We are going to write JPEG format thumbnail
// Write thumbnail dimension
int width = thumbnail.getWidth();
int height = thumbnail.getHeight();
IOUtils.writeIntMM(bout, width);
IOUtils.writeIntMM(bout, height);
// Padded row bytes = (width * bits per pixel + 31) / 32 * 4.
int bitsPerPixel = 24;
int planes = 1;
int widthBytes = (width * bitsPerPixel + 31) / 32 * 4;
IOUtils.writeIntMM(bout, widthBytes);
// Total size = widthbytes * height * planes
IOUtils.writeIntMM(bout, widthBytes * height * planes);
// Size after compression. Used for consistency check.
IOUtils.writeIntMM(bout, data.length);
IOUtils.writeShortMM(bout, bitsPerPixel);
IOUtils.writeShortMM(bout, planes);
bout.write(data);
// Create 8BIM
_8BIM bim = new _8BIM(ImageResourceID.THUMBNAIL_RESOURCE_PS5, "thumbnail", bout.toByteArray());
return bim;
}
public void write(OutputStream os) throws IOException {
ensureDataRead();
IOUtils.write(os, majorVersion);
IOUtils.write(os, minorVersion);
IOUtils.write(os, densityUnit);
IOUtils.writeShortMM(os, getXDensity());
IOUtils.writeShortMM(os, getYDensity());
IOUtils.write(os, thumbnailWidth);
IOUtils.write(os, thumbnailHeight);
if (containsThumbnail) thumbnail.write(os);
}
