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/*****************************************************************************
* Copyright (C) The Apache Software Foundation. All rights reserved. *
* ------------------------------------------------------------------------- *
* This software is published under the terms of the Apache Software License *
* version 1.1, a copy of which has been included with this distribution in *
* the LICENSE file. *
*****************************************************************************/
package com.kitfox.svg.batik;
import java.awt.Color;
import java.awt.Composite;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.color.ColorSpace;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.ComponentSampleModel;
import java.awt.image.DataBuffer;
import java.awt.image.DataBufferByte;
import java.awt.image.DataBufferInt;
import java.awt.image.DataBufferShort;
import java.awt.image.DataBufferUShort;
import java.awt.image.DirectColorModel;
import java.awt.image.Raster;
import java.awt.image.RenderedImage;
import java.awt.image.SampleModel;
import java.awt.image.SinglePixelPackedSampleModel;
import java.awt.image.WritableRaster;
import java.awt.image.renderable.RenderContext;
import java.awt.image.renderable.RenderableImage;
import java.lang.ref.Reference;
import java.lang.ref.WeakReference;
/**
*
* @author kitfox
*/
public class GraphicsUtil
{
/** Creates a new instance of GraphicsUtil */
public GraphicsUtil()
{
}
/**
* Create a new ColorModel with it's alpha premultiplied state matching
* newAlphaPreMult.
* @param cm The ColorModel to change the alpha premult state of.
* @param newAlphaPreMult The new state of alpha premult.
* @return A new colorModel that has isAlphaPremultiplied()
* equal to newAlphaPreMult.
*/
public static ColorModel coerceColorModel(ColorModel cm, boolean newAlphaPreMult)
{
if (cm.isAlphaPremultiplied() == newAlphaPreMult)
return cm;
// Easiest way to build proper colormodel for new Alpha state...
// Eventually this should switch on known ColorModel types and
// only fall back on this hack when the CM type is unknown.
WritableRaster wr = cm.createCompatibleWritableRaster(1,1);
return cm.coerceData(wr, newAlphaPreMult);
}
/**
* Coerces data within a bufferedImage to match newAlphaPreMult,
* Note that this can not change the colormodel of bi so you
*
* @param wr The raster to change the state of.
* @param cm The colormodel currently associated with data in wr.
* @param newAlphaPreMult The desired state of alpha Premult for raster.
* @return A new colormodel that matches newAlphaPreMult.
*/
public static ColorModel coerceData(WritableRaster wr, ColorModel cm, boolean newAlphaPreMult)
{
// System.out.println("CoerceData: " + cm.isAlphaPremultiplied() +
// " Out: " + newAlphaPreMult);
if (cm.hasAlpha()== false)
// Nothing to do no alpha channel
return cm;
if (cm.isAlphaPremultiplied() == newAlphaPreMult)
// nothing to do alpha state matches...
return cm;
// System.out.println("CoerceData: " + wr.getSampleModel());
int [] pixel = null;
int bands = wr.getNumBands();
float norm;
if (newAlphaPreMult)
{
if (is_BYTE_COMP_Data(wr.getSampleModel()))
mult_BYTE_COMP_Data(wr);
else if (is_INT_PACK_Data(wr.getSampleModel(), true))
mult_INT_PACK_Data(wr);
else
{
norm = 1f/255f;
int x0, x1, y0, y1, a, b;
float alpha;
x0 = wr.getMinX();
x1 = x0+wr.getWidth();
y0 = wr.getMinY();
y1 = y0+wr.getHeight();
for (int y=y0; y<y1; y++)
for (int x=x0; x<x1; x++)
{
pixel = wr.getPixel(x,y,pixel);
a = pixel[bands-1];
if ((a >= 0) && (a < 255))
{
alpha = a*norm;
for (b=0; b<bands-1; b++)
pixel[b] = (int)(pixel[b]*alpha+0.5f);
wr.setPixel(x,y,pixel);
}
}
}
} else
{
if (is_BYTE_COMP_Data(wr.getSampleModel()))
divide_BYTE_COMP_Data(wr);
else if (is_INT_PACK_Data(wr.getSampleModel(), true))
divide_INT_PACK_Data(wr);
else
{
int x0, x1, y0, y1, a, b;
float ialpha;
x0 = wr.getMinX();
x1 = x0+wr.getWidth();
y0 = wr.getMinY();
y1 = y0+wr.getHeight();
for (int y=y0; y<y1; y++)
for (int x=x0; x<x1; x++)
{
pixel = wr.getPixel(x,y,pixel);
a = pixel[bands-1];
if ((a > 0) && (a < 255))
{
ialpha = 255/(float)a;
for (b=0; b<bands-1; b++)
pixel[b] = (int)(pixel[b]*ialpha+0.5f);
wr.setPixel(x,y,pixel);
}
}
}
}
return coerceColorModel(cm, newAlphaPreMult);
}
public static boolean is_INT_PACK_Data(SampleModel sm,
boolean requireAlpha)
{
// Check ColorModel is of type DirectColorModel
if(!(sm instanceof SinglePixelPackedSampleModel)) return false;
// Check transfer type
if(sm.getDataType() != DataBuffer.TYPE_INT) return false;
SinglePixelPackedSampleModel sppsm;
sppsm = (SinglePixelPackedSampleModel)sm;
int [] masks = sppsm.getBitMasks();
if (masks.length == 3)
{
if (requireAlpha) return false;
} else if (masks.length != 4)
return false;
if(masks[0] != 0x00ff0000) return false;
if(masks[1] != 0x0000ff00) return false;
if(masks[2] != 0x000000ff) return false;
if ((masks.length == 4) &&
(masks[3] != 0xff000000)) return false;
return true;
}
protected static void mult_INT_PACK_Data(WritableRaster wr)
{
// System.out.println("Multiply Int: " + wr);
SinglePixelPackedSampleModel sppsm;
sppsm = (SinglePixelPackedSampleModel)wr.getSampleModel();
final int width = wr.getWidth();
final int scanStride = sppsm.getScanlineStride();
DataBufferInt db = (DataBufferInt)wr.getDataBuffer();
final int base
= (db.getOffset() +
sppsm.getOffset(wr.getMinX()-wr.getSampleModelTranslateX(),
wr.getMinY()-wr.getSampleModelTranslateY()));
int n=0;
// Access the pixel data array
final int pixels[] = db.getBankData()[0];
for (int y=0; y<wr.getHeight(); y++)
{
int sp = base + y*scanStride;
final int end = sp + width;
while (sp < end)
{
int pixel = pixels[sp];
int a = pixel>>>24;
if ((a>=0) && (a<255))
{
pixels[sp] = ((a << 24) |
((((pixel&0xFF0000)*a)>>8)&0xFF0000) |
((((pixel&0x00FF00)*a)>>8)&0x00FF00) |
((((pixel&0x0000FF)*a)>>8)&0x0000FF));
}
sp++;
}
}
}
protected static void divide_INT_PACK_Data(WritableRaster wr)
{
// System.out.println("Divide Int");
SinglePixelPackedSampleModel sppsm;
sppsm = (SinglePixelPackedSampleModel)wr.getSampleModel();
final int width = wr.getWidth();
final int scanStride = sppsm.getScanlineStride();
DataBufferInt db = (DataBufferInt)wr.getDataBuffer();
final int base
= (db.getOffset() +
sppsm.getOffset(wr.getMinX()-wr.getSampleModelTranslateX(),
wr.getMinY()-wr.getSampleModelTranslateY()));
int pixel, a, aFP, n=0;
// Access the pixel data array
final int pixels[] = db.getBankData()[0];
for (int y=0; y<wr.getHeight(); y++)
{
int sp = base + y*scanStride;
final int end = sp + width;
while (sp < end)
{
pixel = pixels[sp];
a = pixel>>>24;
if (a<=0)
{
pixels[sp] = 0x00FFFFFF;
}
else if (a<255)
{
aFP = (0x00FF0000/a);
pixels[sp] =
((a << 24) |
(((((pixel&0xFF0000)>>16)*aFP)&0xFF0000) ) |
(((((pixel&0x00FF00)>>8) *aFP)&0xFF0000)>>8 ) |
(((((pixel&0x0000FF)) *aFP)&0xFF0000)>>16));
}
sp++;
}
}
}
public static boolean is_BYTE_COMP_Data(SampleModel sm)
{
// Check ColorModel is of type DirectColorModel
if(!(sm instanceof ComponentSampleModel)) return false;
// Check transfer type
if(sm.getDataType() != DataBuffer.TYPE_BYTE) return false;
return true;
}
protected static void mult_BYTE_COMP_Data(WritableRaster wr)
{
// System.out.println("Multiply Int: " + wr);
ComponentSampleModel csm;
csm = (ComponentSampleModel)wr.getSampleModel();
final int width = wr.getWidth();
final int scanStride = csm.getScanlineStride();
final int pixStride = csm.getPixelStride();
final int [] bandOff = csm.getBandOffsets();
DataBufferByte db = (DataBufferByte)wr.getDataBuffer();
final int base
= (db.getOffset() +
csm.getOffset(wr.getMinX()-wr.getSampleModelTranslateX(),
wr.getMinY()-wr.getSampleModelTranslateY()));
int a=0;
int aOff = bandOff[bandOff.length-1];
int bands = bandOff.length-1;
int b, i;
// Access the pixel data array
final byte pixels[] = db.getBankData()[0];
for (int y=0; y<wr.getHeight(); y++)
{
int sp = base + y*scanStride;
final int end = sp + width*pixStride;
while (sp < end)
{
a = pixels[sp+aOff]&0xFF;
if (a!=0xFF)
for (b=0; b<bands; b++)
{
i = sp+bandOff[b];
pixels[i] = (byte)(((pixels[i]&0xFF)*a)>>8);
}
sp+=pixStride;
}
}
}
protected static void divide_BYTE_COMP_Data(WritableRaster wr)
{
// System.out.println("Multiply Int: " + wr);
ComponentSampleModel csm;
csm = (ComponentSampleModel)wr.getSampleModel();
final int width = wr.getWidth();
final int scanStride = csm.getScanlineStride();
final int pixStride = csm.getPixelStride();
final int [] bandOff = csm.getBandOffsets();
DataBufferByte db = (DataBufferByte)wr.getDataBuffer();
final int base
= (db.getOffset() +
csm.getOffset(wr.getMinX()-wr.getSampleModelTranslateX(),
wr.getMinY()-wr.getSampleModelTranslateY()));
int a=0;
int aOff = bandOff[bandOff.length-1];
int bands = bandOff.length-1;
int b, i;
// Access the pixel data array
final byte pixels[] = db.getBankData()[0];
for (int y=0; y<wr.getHeight(); y++)
{
int sp = base + y*scanStride;
final int end = sp + width*pixStride;
while (sp < end)
{
a = pixels[sp+aOff]&0xFF;
if (a==0)
{
for (b=0; b<bands; b++)
pixels[sp+bandOff[b]] = (byte)0xFF;
} else if (a<255)
{
int aFP = (0x00FF0000/a);
for (b=0; b<bands; b++)
{
i = sp+bandOff[b];
pixels[i] = (byte)(((pixels[i]&0xFF)*aFP)>>>16);
}
}
sp+=pixStride;
}
}
}
}
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