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This is a backport of OpenJFX 8 to run on Java 7.
The newest version!
/*
* Copyright (c) 2012, 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.image.impl;
import com.sun.javafx.image.AlphaType;
import com.sun.javafx.image.BytePixelAccessor;
import com.sun.javafx.image.BytePixelGetter;
import com.sun.javafx.image.BytePixelSetter;
import com.sun.javafx.image.ByteToBytePixelConverter;
import com.sun.javafx.image.PixelUtils;
import java.nio.ByteBuffer;
public class ByteGrayAlpha {
public static final BytePixelGetter getter = Accessor.nonpremul;
public static final BytePixelSetter setter = Accessor.nonpremul;
public static final BytePixelAccessor accessor = Accessor.nonpremul;
public static final ByteToBytePixelConverter ToByteGrayAlphaPre =
ToByteGrayAlphaPreConv.instance;
public static final ByteToBytePixelConverter ToByteBgra =
ToByteBgraSameConv.nonpremul;
static class Accessor implements BytePixelAccessor {
static final BytePixelAccessor nonpremul = new Accessor(false);
static final BytePixelAccessor premul = new Accessor(true);
private boolean isPremult;
private Accessor(boolean isPremult) {
this.isPremult = isPremult;
}
@Override
public AlphaType getAlphaType() {
return isPremult ? AlphaType.PREMULTIPLIED : AlphaType.NONPREMULTIPLIED;
}
@Override
public int getNumElements() {
return 2;
}
@Override
public int getArgb(byte arr[], int offset) {
int g = arr[offset ] & 0xff;
int a = arr[offset + 1] & 0xff;
if (isPremult) g = PixelUtils.PreToNonPre(g, a);
return ((a << 24) | (g << 16) | (g << 8) | g);
}
@Override
public int getArgbPre(byte arr[], int offset) {
int g = arr[offset ] & 0xff;
int a = arr[offset + 1] & 0xff;
if (!isPremult) g = PixelUtils.NonPretoPre(g, a);
return ((a << 24) | (g << 16) | (g << 8) | g);
}
@Override
public int getArgb(ByteBuffer buf, int offset) {
int g = buf.get(offset ) & 0xff;
int a = buf.get(offset + 1) & 0xff;
if (isPremult) g = PixelUtils.PreToNonPre(g, a);
return ((a << 24) | (g << 16) | (g << 8) | g);
}
@Override
public int getArgbPre(ByteBuffer buf, int offset) {
int g = buf.get(offset ) & 0xff;
int a = buf.get(offset + 1) & 0xff;
if (!isPremult) g = PixelUtils.NonPretoPre(g, a);
return ((a << 24) | (g << 16) | (g << 8) | g);
}
@Override
public void setArgb(byte arr[], int offset, int argb) {
int g = PixelUtils.RgbToGray(argb);
int a = (argb >>> 24);
if (isPremult) g = PixelUtils.NonPretoPre(g, a);
arr[offset ] = (byte) g;
arr[offset + 1] = (byte) a;
}
@Override
public void setArgbPre(byte arr[], int offset, int argbpre) {
int g = PixelUtils.RgbToGray(argbpre);
int a = (argbpre >>> 24);
if (!isPremult) g = PixelUtils.PreToNonPre(g, a);
arr[offset ] = (byte) g;
arr[offset + 1] = (byte) a;
}
@Override
public void setArgb(ByteBuffer buf, int offset, int argb) {
int g = PixelUtils.RgbToGray(argb);
int a = (argb >>> 24);
if (isPremult) g = PixelUtils.NonPretoPre(g, a);
buf.put(offset , (byte) g);
buf.put(offset + 1, (byte) a);
}
@Override
public void setArgbPre(ByteBuffer buf, int offset, int argbpre) {
int g = PixelUtils.RgbToGray(argbpre);
int a = (argbpre >>> 24);
if (!isPremult) g = PixelUtils.PreToNonPre(g, a);
buf.put(offset , (byte) g);
buf.put(offset + 1, (byte) a);
}
}
static class ToByteGrayAlphaPreConv extends BaseByteToByteConverter {
static final ByteToBytePixelConverter instance =
new ToByteGrayAlphaPreConv();
private ToByteGrayAlphaPreConv() {
super(ByteGrayAlpha.getter, ByteGrayAlphaPre.setter);
}
@Override
void doConvert(byte srcarr[], int srcoff, int srcscanbytes,
byte dstarr[], int dstoff, int dstscanbytes,
int w, int h)
{
srcscanbytes -= w * 2;
dstscanbytes -= w * 2;
while (--h >= 0) {
for (int x = 0; x < w; x++) {
int g = srcarr[srcoff++] & 0xff;
int a = srcarr[srcoff++];
if (a != -1) {
if (a == 0) {
g = 0;
} else {
g = (g * (a & 0xff) + 0x7f) / 0xff;
}
}
dstarr[dstoff++] = (byte) g;
dstarr[dstoff++] = (byte) a;
}
srcoff += srcscanbytes;
dstoff += dstscanbytes;
}
}
@Override
void doConvert(ByteBuffer srcbuf, int srcoff, int srcscanbytes,
ByteBuffer dstbuf, int dstoff, int dstscanbytes,
int w, int h)
{
srcscanbytes -= w * 2;
dstscanbytes -= w * 2;
while (--h >= 0) {
for (int x = 0; x < w; x++) {
int g = srcbuf.get(srcoff++) & 0xff;
int a = srcbuf.get(srcoff++);
if (a != -1) {
if (a == 0) {
g = 0;
} else {
g = (g * (a & 0xff) + 0x7f) / 0xff;
}
}
dstbuf.put(dstoff++, (byte) g);
dstbuf.put(dstoff++, (byte) a);
}
srcoff += srcscanbytes;
dstoff += dstscanbytes;
}
}
}
static class ToByteBgraSameConv extends BaseByteToByteConverter {
static final ByteToBytePixelConverter nonpremul =
new ToByteBgraSameConv(false);
static final ByteToBytePixelConverter premul =
new ToByteBgraSameConv(true);
private ToByteBgraSameConv(boolean isPremult) {
super(isPremult ? ByteGrayAlphaPre.getter : ByteGrayAlpha.getter,
isPremult ? ByteBgraPre.setter : ByteBgra.setter);
}
@Override
void doConvert(byte srcarr[], int srcoff, int srcscanbytes,
byte dstarr[], int dstoff, int dstscanbytes,
int w, int h)
{
srcscanbytes -= w * 2;
dstscanbytes -= w * 4;
while (--h >= 0) {
for (int x = 0; x < w; x++) {
byte g = srcarr[srcoff++];
byte a = srcarr[srcoff++];
dstarr[dstoff++] = g;
dstarr[dstoff++] = g;
dstarr[dstoff++] = g;
dstarr[dstoff++] = a;
}
srcoff += srcscanbytes;
dstoff += dstscanbytes;
}
}
@Override
void doConvert(ByteBuffer srcbuf, int srcoff, int srcscanbytes,
ByteBuffer dstbuf, int dstoff, int dstscanbytes,
int w, int h)
{
srcscanbytes -= w * 2;
dstscanbytes -= w * 4;
while (--h >= 0) {
for (int x = 0; x < w; x++) {
byte g = srcbuf.get(srcoff++);
byte a = srcbuf.get(srcoff++);
dstbuf.put(dstoff++, g);
dstbuf.put(dstoff++, g);
dstbuf.put(dstoff++, g);
dstbuf.put(dstoff++, a);
}
srcoff += srcscanbytes;
dstoff += dstscanbytes;
}
}
}
}