org.apache.poi.hwmf.record.HwmfPalette Maven / Gradle / Ivy
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contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
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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.
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package org.apache.poi.hwmf.record;
import java.awt.Color;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.hwmf.draw.HwmfDrawProperties;
import org.apache.poi.hwmf.draw.HwmfGraphics;
import org.apache.poi.util.BitField;
import org.apache.poi.util.BitFieldFactory;
import org.apache.poi.util.LittleEndianConsts;
import org.apache.poi.util.LittleEndianInputStream;
public class HwmfPalette {
public static class PaletteEntry {
private static final BitField PC_RESERVED = BitFieldFactory.getInstance(0x01);
private static final BitField PC_EXPLICIT = BitFieldFactory.getInstance(0x02);
private static final BitField PC_NOCOLLAPSE = BitFieldFactory.getInstance(0x04);
private int values;
private Color colorRef;
private PaletteEntry() {
this.values = PC_RESERVED.set(0);
this.colorRef = Color.BLACK;
}
private PaletteEntry(PaletteEntry other) {
this.values = other.values;
this.colorRef = other.colorRef;
}
public int init(LittleEndianInputStream leis) throws IOException {
// Values (1 byte): An 8-bit unsigned integer that defines how the palette entry is to be used.
// The Values field MUST be 0x00 or one of the values in the PaletteEntryFlag Enumeration table.
values = leis.readUByte();
// Blue (1 byte): An 8-bit unsigned integer that defines the blue intensity value for the palette entry.
int blue = leis.readUByte();
// Green (1 byte): An 8-bit unsigned integer that defines the green intensity value for the palette entry.
int green = leis.readUByte();
// Red (1 byte): An 8-bit unsigned integer that defines the red intensity value for the palette entry.
int red = leis.readUByte();
colorRef = new Color(red, green, blue);
return 4*LittleEndianConsts.BYTE_SIZE;
}
/**
* Specifies that the logical palette entry be used for palette animation. This value
* prevents other windows from matching colors to the palette entry because the color frequently
* changes. If an unused system-palette entry is available, the color is placed in that entry.
* Otherwise, the color is not available for animation.
*/
public boolean isReserved() {
return PC_RESERVED.isSet(values);
}
/**
* Specifies that the low-order word of the logical palette entry designates a hardware
* palette index. This value allows the application to show the contents of the display device palette.
*/
public boolean isExplicit() {
return PC_EXPLICIT.isSet(values);
}
/**
* Specifies that the color be placed in an unused entry in the system palette
* instead of being matched to an existing color in the system palette. If there are no unused entries
* in the system palette, the color is matched normally. Once this color is in the system palette,
* colors in other logical palettes can be matched to this color.
*/
public boolean isNoCollapse() {
return PC_NOCOLLAPSE.isSet(values);
}
}
public static abstract class WmfPaletteParent implements HwmfRecord, HwmfObjectTableEntry {
/**
* Start (2 bytes): A 16-bit unsigned integer that defines the offset into the Palette Object when
* used with the META_SETPALENTRIES and META_ANIMATEPALETTE record types.
* When used with META_CREATEPALETTE, it MUST be 0x0300
*/
private int start;
private List palette = new ArrayList<>();
@Override
public int init(LittleEndianInputStream leis, long recordSize, int recordFunction) throws IOException {
start = leis.readUShort();
/**
* NumberOfEntries (2 bytes): A 16-bit unsigned integer that defines the number of objects in
* aPaletteEntries.
*/
int numberOfEntries = leis.readUShort();
int size = 2*LittleEndianConsts.SHORT_SIZE;
for (int i=0; i getPaletteCopy() {
List newPalette = new ArrayList<>();
for (PaletteEntry et : palette) {
newPalette.add(new PaletteEntry(et));
}
return newPalette;
}
protected int getPaletteStart() {
return start;
}
}
/**
* The META_CREATEPALETTE record creates a Palette Object
*/
public static class WmfCreatePalette extends WmfPaletteParent implements HwmfObjectTableEntry {
@Override
public HwmfRecordType getRecordType() {
return HwmfRecordType.createPalette;
}
@Override
public void applyObject(HwmfGraphics ctx) {
ctx.getProperties().setPalette(getPaletteCopy());
}
}
/**
* The META_SETPALENTRIES record defines RGB color values in a range of entries in the logical
* palette that is defined in the playback device context.
*/
public static class WmfSetPaletteEntries extends WmfPaletteParent {
@Override
public HwmfRecordType getRecordType() {
return HwmfRecordType.setPalEntries;
}
@Override
public void applyObject(HwmfGraphics ctx) {
HwmfDrawProperties props = ctx.getProperties();
List palette = props.getPalette();
if (palette == null) {
palette = new ArrayList<>();
}
int start = getPaletteStart();
for (int i=palette.size(); i palette = props.getPalette();
if (palette == null) {
palette = new ArrayList<>();
}
for (int i=palette.size(); i dest = props.getPalette();
List src = getPaletteCopy();
int start = getPaletteStart();
if (dest == null) {
dest = new ArrayList<>();
}
for (int i=dest.size(); i