/*
* Copyright 2002-2012 Drew Noakes
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* More information about this project is available at:
*
* http://drewnoakes.com/code/exif/
* http://code.google.com/p/metadata-extractor/
*/
package com.drew.metadata.photoshop;
import com.drew.lang.BufferBoundsException;
import com.drew.lang.BufferReader;
import com.drew.lang.ByteArrayReader;
import com.drew.lang.annotations.NotNull;
import com.drew.lang.annotations.Nullable;
import com.drew.metadata.TagDescriptor;
/** @author Yuri Binev, Drew Noakes http://drewnoakes.com */
public class PhotoshopDescriptor extends TagDescriptor<PhotoshopDirectory>
{
public PhotoshopDescriptor(@NotNull PhotoshopDirectory directory)
{
super(directory);
}
public String getDescription(int tagType)
{
switch (tagType) {
case PhotoshopDirectory.TAG_PHOTOSHOP_THUMBNAIL:
case PhotoshopDirectory.TAG_PHOTOSHOP_THUMBNAIL_OLD:
return getThumbnailDescription(tagType);
case PhotoshopDirectory.TAG_PHOTOSHOP_URL:
case PhotoshopDirectory.TAG_PHOTOSHOP_XML:
return getSimpleString(tagType);
case PhotoshopDirectory.TAG_PHOTOSHOP_IPTC:
return getBinaryDataString(tagType);
case PhotoshopDirectory.TAG_PHOTOSHOP_SLICES:
return getSlicesDescription();
case PhotoshopDirectory.TAG_PHOTOSHOP_VERSION:
return getVersionDescription();
case PhotoshopDirectory.TAG_PHOTOSHOP_COPYRIGHT:
return getBooleanString(tagType);
case PhotoshopDirectory.TAG_PHOTOSHOP_RESOLUTION_INFO:
return getResolutionInfoDescription();
case PhotoshopDirectory.TAG_PHOTOSHOP_GLOBAL_ANGLE:
case PhotoshopDirectory.TAG_PHOTOSHOP_GLOBAL_ALTITUDE:
case PhotoshopDirectory.TAG_PHOTOSHOP_URL_LIST:
case PhotoshopDirectory.TAG_PHOTOSHOP_SEED_NUMBER:
return get32BitNumberString(tagType);
case PhotoshopDirectory.TAG_PHOTOSHOP_JPEG_QUALITY:
return getJpegQualityString();
case PhotoshopDirectory.TAG_PHOTOSHOP_PRINT_SCALE:
return getPrintScaleDescription();
case PhotoshopDirectory.TAG_PHOTOSHOP_PIXEL_ASPECT_RATIO:
return getPixelAspectRatioString();
default:
return super.getDescription(tagType);
}
}
@Nullable
public String getJpegQualityString()
{
try {
byte[] b = _directory.getByteArray(PhotoshopDirectory.TAG_PHOTOSHOP_JPEG_QUALITY);
BufferReader reader = new ByteArrayReader(b);
int q = reader.getUInt16(0); // & 0xFFFF;
int f = reader.getUInt16(2); // & 0xFFFF;
int s = reader.getUInt16(4);
int q1;
if (q <= 0xFFFF && q >= 0xFFFD)
q1 = q - 0xFFFC;
else if (q <= 8)
q1 = q + 4;
else
q1 = q;
String quality;
switch (q) {
case 0xFFFD:
case 0xFFFE:
case 0xFFFF:
case 0:
quality = "Low";
break;
case 1:
case 2:
case 3:
quality = "Medium";
break;
case 4:
case 5:
quality = "High";
break;
case 6:
case 7:
case 8:
quality = "Maximum";
break;
default:
quality = "Unknown";
}
String format;
switch (f) {
case 0x0000:
format = "Standard";
break;
case 0x0001:
format = "Optimised";
break;
case 0x0101:
format = "Progressive ";
break;
default:
format = String.format("Unknown 0x%04X", f);
}
String scans = s >= 1 && s <= 3
? String.format("%d", s + 2)
: String.format("Unknown 0x%04X", s);
return String.format("%d (%s), %s format, %s scans", q1, quality, format, scans);
} catch (BufferBoundsException e) {
return null;
}
}
@Nullable
public String getPixelAspectRatioString()
{
try {
byte[] bytes = _directory.getByteArray(PhotoshopDirectory.TAG_PHOTOSHOP_PIXEL_ASPECT_RATIO);
if (bytes == null)
return null;
BufferReader reader = new ByteArrayReader(bytes);
double d = reader.getDouble64(4);
return Double.toString(d);
} catch (Exception e) {
return null;
}
}
@Nullable
public String getPrintScaleDescription()
{
try {
byte bytes[] = _directory.getByteArray(PhotoshopDirectory.TAG_PHOTOSHOP_PRINT_SCALE);
if (bytes == null)
return null;
BufferReader reader = new ByteArrayReader(bytes);
int style = reader.getInt32(0);
float locX = reader.getFloat32(2);
float locY = reader.getFloat32(6);
float scale = reader.getFloat32(10);
switch (style) {
case 0:
return "Centered, Scale " + scale;
case 1:
return "Size to fit";
case 2:
return String.format("User defined, X:%s Y:%s, Scale:%s", locX, locY, scale);
default:
return String.format("Unknown %04X, X:%s Y:%s, Scale:%s", style, locX, locY, scale);
}
} catch (Exception e) {
return null;
}
}
@Nullable
public String getResolutionInfoDescription()
{
try {
byte[] bytes = _directory.getByteArray(PhotoshopDirectory.TAG_PHOTOSHOP_RESOLUTION_INFO);
if (bytes == null)
return null;
BufferReader reader = new ByteArrayReader(bytes);
float resX = reader.getS15Fixed16(0);
float resY = reader.getS15Fixed16(8); // is this the correct offset? it's only reading 4 bytes each time
return resX + "x" + resY + " DPI";
} catch (Exception e) {
return null;
}
}
@Nullable
public String getVersionDescription()
{
try {
final byte[] bytes = _directory.getByteArray(PhotoshopDirectory.TAG_PHOTOSHOP_VERSION);
if (bytes == null)
return null;
BufferReader reader = new ByteArrayReader(bytes);
int pos = 0;
int ver = reader.getInt32(0);
pos += 4;
pos++;
int readerLength = reader.getInt32(5);
pos += 4;
String readerStr = reader.getString(9, readerLength * 2, "UTF-16");
pos += readerLength * 2;
int writerLength = reader.getInt32(pos);
pos += 4;
String writerStr = reader.getString(pos, writerLength * 2, "UTF-16");
pos += writerLength * 2;
int fileVersion = reader.getInt32(pos);
return String.format("%d (%s, %s) %d", ver, readerStr, writerStr, fileVersion);
} catch (BufferBoundsException e) {
return null;
}
}
@Nullable
public String getSlicesDescription()
{
try {
final byte bytes[] = _directory.getByteArray(PhotoshopDirectory.TAG_PHOTOSHOP_SLICES);
if (bytes == null)
return null;
BufferReader reader = new ByteArrayReader(bytes);
int nameLength = reader.getInt32(20);
String name = reader.getString(24, nameLength * 2, "UTF-16");
int pos = 24 + nameLength * 2;
int sliceCount = reader.getInt32(pos);
//pos += 4;
return String.format("%s (%d,%d,%d,%d) %d Slices",
name, reader.getInt32(4), reader.getInt32(8), reader.getInt32(12), reader.getInt32(16), sliceCount);
/*for (int i=0;i<sliceCount;i++){
pos+=16;
int slNameLen=getInt32(b,pos);
pos+=4;
String slName=new String(b, pos, slNameLen*2,"UTF-16");
res+=slName;
}*/
} catch (BufferBoundsException e) {
return null;
}
}
@Nullable
public String getThumbnailDescription(int tagType)
{
try {
byte[] v = _directory.getByteArray(tagType);
if (v == null)
return null;
BufferReader reader = new ByteArrayReader(v);
//int pos = 0;
int format = reader.getInt32(0);
//pos += 4;
int width = reader.getInt32(4);
//pos += 4;
int height = reader.getInt32(8);
//pos += 4;
//pos += 4; //skip WidthBytes
int totalSize = reader.getInt32(16);
//pos += 4;
int compSize = reader.getInt32(20);
//pos += 4;
int bpp = reader.getInt32(24);
//pos+=2;
//pos+=2; //skip Number of planes
//int thumbSize=v.length-pos;
return String.format("%s, %dx%d, Decomp %d bytes, %d bpp, %d bytes",
format == 1 ? "JpegRGB" : "RawRGB",
width, height, totalSize, bpp, compSize);
} catch (BufferBoundsException e) {
return null;
}
}
@Nullable
private String getBooleanString(int tag)
{
final byte[] bytes = _directory.getByteArray(tag);
if (bytes == null)
return null;
return bytes[0] == 0 ? "No" : "Yes";
}
@Nullable
private String get32BitNumberString(int tag)
{
byte[] bytes = _directory.getByteArray(tag);
if (bytes == null)
return null;
BufferReader reader = new ByteArrayReader(bytes);
try {
return String.format("%d", reader.getInt32(0));
} catch (BufferBoundsException e) {
return null;
}
}
@Nullable
private String getSimpleString(int tagType)
{
final byte[] bytes = _directory.getByteArray(tagType);
if (bytes == null)
return null;
return new String(bytes);
}
@Nullable
private String getBinaryDataString(int tagType)
{
final byte[] bytes = _directory.getByteArray(tagType);
if (bytes == null)
return null;
return String.format("%d bytes binary data", bytes.length);
}
}