| Method from java.awt.image.LookupOp Detail: |
|---|
 public BufferedImage createCompatibleDestImage(BufferedImage src,
ColorModel destCM) {
BufferedImage image;
int w = src.getWidth();
int h = src.getHeight();
int transferType = DataBuffer.TYPE_BYTE;
if (destCM == null) {
ColorModel cm = src.getColorModel();
Raster raster = src.getRaster();
if (cm instanceof ComponentColorModel) {
DataBuffer db = raster.getDataBuffer();
boolean hasAlpha = cm.hasAlpha();
boolean isPre = cm.isAlphaPremultiplied();
int trans = cm.getTransparency();
int[] nbits = null;
if (ltable instanceof ByteLookupTable) {
if (db.getDataType() == db.TYPE_USHORT) {
// Dst raster should be of type byte
if (hasAlpha) {
nbits = new int[2];
if (trans == cm.BITMASK) {
nbits[1] = 1;
}
else {
nbits[1] = 8;
}
}
else {
nbits = new int[1];
}
nbits[0] = 8;
}
// For byte, no need to change the cm
}
else if (ltable instanceof ShortLookupTable) {
transferType = DataBuffer.TYPE_USHORT;
if (db.getDataType() == db.TYPE_BYTE) {
if (hasAlpha) {
nbits = new int[2];
if (trans == cm.BITMASK) {
nbits[1] = 1;
}
else {
nbits[1] = 16;
}
}
else {
nbits = new int[1];
}
nbits[0] = 16;
}
}
if (nbits != null) {
cm = new ComponentColorModel(cm.getColorSpace(),
nbits, hasAlpha, isPre,
trans, transferType);
}
}
image = new BufferedImage(cm,
cm.createCompatibleWritableRaster(w, h),
cm.isAlphaPremultiplied(),
null);
}
else {
image = new BufferedImage(destCM,
destCM.createCompatibleWritableRaster(w,
h),
destCM.isAlphaPremultiplied(),
null);
}
return image;
}
Creates a zeroed destination image with the correct size and number of
bands. If destCM is null, an appropriate
ColorModel will be used. |
public WritableRaster createCompatibleDestRaster(Raster src) {
return src.createCompatibleWritableRaster();
} Creates a zeroed-destination Raster with the
correct size and number of bands, given this source. |
public final BufferedImage filter(BufferedImage src,
BufferedImage dst) {
ColorModel srcCM = src.getColorModel();
int numBands = srcCM.getNumColorComponents();
ColorModel dstCM;
if (srcCM instanceof IndexColorModel) {
throw new
IllegalArgumentException("LookupOp cannot be "+
"performed on an indexed image");
}
int numComponents = ltable.getNumComponents();
if (numComponents != 1 &&
numComponents != srcCM.getNumComponents() &&
numComponents != srcCM.getNumColorComponents())
{
throw new IllegalArgumentException("Number of arrays in the "+
" lookup table ("+
numComponents+
" is not compatible with the "+
" src image: "+src);
}
boolean needToConvert = false;
int width = src.getWidth();
int height = src.getHeight();
if (dst == null) {
dst = createCompatibleDestImage(src, null);
dstCM = srcCM;
}
else {
if (width != dst.getWidth()) {
throw new
IllegalArgumentException("Src width ("+width+
") not equal to dst width ("+
dst.getWidth()+")");
}
if (height != dst.getHeight()) {
throw new
IllegalArgumentException("Src height ("+height+
") not equal to dst height ("+
dst.getHeight()+")");
}
dstCM = dst.getColorModel();
if (srcCM.getColorSpace().getType() !=
dstCM.getColorSpace().getType())
{
needToConvert = true;
dst = createCompatibleDestImage(src, null);
}
}
BufferedImage origDst = dst;
if (ImagingLib.filter(this, src, dst) == null) {
// Do it the slow way
WritableRaster srcRaster = src.getRaster();
WritableRaster dstRaster = dst.getRaster();
if (srcCM.hasAlpha()) {
if (numBands-1 == numComponents || numComponents == 1) {
int minx = srcRaster.getMinX();
int miny = srcRaster.getMinY();
int[] bands = new int[numBands-1];
for (int i=0; i < numBands-1; i++) {
bands[i] = i;
}
srcRaster =
srcRaster.createWritableChild(minx, miny,
srcRaster.getWidth(),
srcRaster.getHeight(),
minx, miny,
bands);
}
}
if (dstCM.hasAlpha()) {
int dstNumBands = dstRaster.getNumBands();
if (dstNumBands-1 == numComponents || numComponents == 1) {
int minx = dstRaster.getMinX();
int miny = dstRaster.getMinY();
int[] bands = new int[numBands-1];
for (int i=0; i < numBands-1; i++) {
bands[i] = i;
}
dstRaster =
dstRaster.createWritableChild(minx, miny,
dstRaster.getWidth(),
dstRaster.getHeight(),
minx, miny,
bands);
}
}
filter(srcRaster, dstRaster);
}
if (needToConvert) {
// ColorModels are not the same
ColorConvertOp ccop = new ColorConvertOp(hints);
ccop.filter(dst, origDst);
}
return origDst;
} Performs a lookup operation on a BufferedImage.
If the color model in the source image is not the same as that
in the destination image, the pixels will be converted
in the destination. If the destination image is null,
a BufferedImage will be created with an appropriate
ColorModel. An IllegalArgumentException
might be thrown if the number of arrays in the
LookupTable does not meet the restrictions
stated in the class comment above, or if the source image
has an IndexColorModel. |
public final WritableRaster filter(Raster src,
WritableRaster dst) {
int numBands = src.getNumBands();
int dstLength = dst.getNumBands();
int height = src.getHeight();
int width = src.getWidth();
int srcPix[] = new int[numBands];
// Create a new destination Raster, if needed
if (dst == null) {
dst = createCompatibleDestRaster(src);
}
else if (height != dst.getHeight() || width != dst.getWidth()) {
throw new
IllegalArgumentException ("Width or height of Rasters do not "+
"match");
}
dstLength = dst.getNumBands();
if (numBands != dstLength) {
throw new
IllegalArgumentException ("Number of channels in the src ("
+ numBands +
") does not match number of channels"
+ " in the destination ("
+ dstLength + ")");
}
int numComponents = ltable.getNumComponents();
if (numComponents != 1 && numComponents != src.getNumBands()) {
throw new IllegalArgumentException("Number of arrays in the "+
" lookup table ("+
numComponents+
" is not compatible with the "+
" src Raster: "+src);
}
if (ImagingLib.filter(this, src, dst) != null) {
return dst;
}
// Optimize for cases we know about
if (ltable instanceof ByteLookupTable) {
byteFilter ((ByteLookupTable) ltable, src, dst,
width, height, numBands);
}
else if (ltable instanceof ShortLookupTable) {
shortFilter ((ShortLookupTable) ltable, src, dst, width,
height, numBands);
}
else {
// Not one we recognize so do it slowly
int sminX = src.getMinX();
int sY = src.getMinY();
int dminX = dst.getMinX();
int dY = dst.getMinY();
for (int y=0; y < height; y++, sY++, dY++) {
int sX = sminX;
int dX = dminX;
for (int x=0; x < width; x++, sX++, dX++) {
// Find data for all bands at this x,y position
src.getPixel(sX, sY, srcPix);
// Lookup the data for all bands at this x,y position
ltable.lookupPixel(srcPix, srcPix);
// Put it back for all bands
dst.setPixel(dX, dY, srcPix);
}
}
}
return dst;
} Performs a lookup operation on a Raster.
If the destination Raster is null,
a new Raster will be created.
The IllegalArgumentException might be thrown
if the source Raster and the destination
Raster do not have the same
number of bands or if the number of arrays in the
LookupTable does not meet the
restrictions stated in the class comment above. |
public final Rectangle2D getBounds2D(BufferedImage src) {
return getBounds2D(src.getRaster());
} Returns the bounding box of the filtered destination image. Since
this is not a geometric operation, the bounding box does not
change. |
public final Rectangle2D getBounds2D(Raster src) {
return src.getBounds();
} Returns the bounding box of the filtered destination Raster. Since
this is not a geometric operation, the bounding box does not
change. |
public final Point2D getPoint2D(Point2D srcPt,
Point2D dstPt) {
if (dstPt == null) {
dstPt = new Point2D.Float();
}
dstPt.setLocation(srcPt.getX(), srcPt.getY());
return dstPt;
} Returns the location of the destination point given a
point in the source. If dstPt is not
null, it will be used to hold the return value.
Since this is not a geometric operation, the srcPt
will equal the dstPt. |
public final RenderingHints getRenderingHints() {
return hints;
} Returns the rendering hints for this op. |
public final LookupTable getTable() {
return ltable;
} |
java.awt.image.LookupOp
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