DirectColorModelpublic class DirectColorModel extends PackedColorModel The DirectColorModel class is a ColorModel
class that works with pixel values that represent RGB
color and alpha information as separate samples and that pack all
samples for a single pixel into a single int, short, or byte quantity.
This class can be used only with ColorSpaces of type ColorSpace.TYPE_RGB.
In addition, for each component of the ColorSpace, the minimum
normalized component value obtained via the getMinValue()
method of ColorSpace must be 0.0, and the maximum value obtained via
the getMaxValue() method must be 1.0 (these min/max
values are typical for RGB spaces).
There must be three color samples in the pixel values and there can
be a single alpha sample. For those methods that use a primitive array
pixel representation of type transferType, the array
length is always one. The transfer
types supported are DataBuffer.TYPE_BYTE,
DataBuffer.TYPE_USHORT, and DataBuffer.TYPE_INT.
Color and alpha samples are stored in the single
element of the array in bits indicated by bit masks. Each bit mask
must be contiguous and masks must not overlap. The same masks apply to
the single int pixel representation used by other methods. The
correspondence of masks and color/alpha samples is as follows:
- Masks are identified by indices running from 0 through 2
if no alpha is present, or 3 if an alpha is present.
- The first three indices refer to color samples;
index 0 corresponds to red, index 1 to green, and index 2 to blue.
- Index 3 corresponds to the alpha sample, if present.
The translation from pixel values to color/alpha components for
display or processing purposes is a one-to-one correspondence of
samples to components. A DirectColorModel is
typically used with image data which uses masks to define packed
samples. For example, a DirectColorModel can be used in
conjunction with a SinglePixelPackedSampleModel to
construct a {@link BufferedImage}. Normally the masks used by the
{@link SampleModel} and the ColorModel would be the
same. However, if they are different, the color interpretation
of pixel data will be done according to the masks of the
ColorModel.
A single int pixel representation is valid for all objects of this
class, since it is always possible to represent pixel values used with
this class in a single int. Therefore, methods which use this
representation will not throw an IllegalArgumentException
due to an invalid pixel value.
This color model is similar to an X11 TrueColor visual.
The default RGB ColorModel specified by the
{@link ColorModel#getRGBdefault() getRGBdefault} method is a
DirectColorModel with the following parameters:
Number of bits: 32
Red mask: 0x00ff0000
Green mask: 0x0000ff00
Blue mask: 0x000000ff
Alpha mask: 0xff000000
Color space: sRGB
isAlphaPremultiplied: False
Transparency: Transparency.TRANSLUCENT
transferType: DataBuffer.TYPE_INT
Many of the methods in this class are final. This is because the
underlying native graphics code makes assumptions about the layout
and operation of this class and those assumptions are reflected in
the implementations of the methods here that are marked final. You
can subclass this class for other reasons, but you cannot override
or modify the behavior of those methods. |
| Fields Summary |
|---|
| private int | red_mask | | private int | green_mask | | private int | blue_mask | | private int | alpha_mask | | private int | red_offset | | private int | green_offset | | private int | blue_offset | | private int | alpha_offset | | private int | red_scale | | private int | green_scale | | private int | blue_scale | | private int | alpha_scale | | private boolean | is_LinearRGB | | private int | lRGBprecision | | private byte[] | tosRGB8LUT | | private byte[] | fromsRGB8LUT8 | | private short[] | fromsRGB8LUT16 |
| Constructors Summary |
|---|
public DirectColorModel(int bits, int rmask, int gmask, int bmask)Constructs a DirectColorModel from the specified masks
that indicate which bits in an int pixel representation
contain the red, green and blue color samples. As pixel values do not
contain alpha information, all pixels are treated as opaque, which
means that alpha = 1.0. All of the bits
in each mask must be contiguous and fit in the specified number
of least significant bits of an int pixel representation.
The ColorSpace is the default sRGB space. The
transparency value is Transparency.OPAQUE. The transfer type
is the smallest of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT,
or DataBuffer.TYPE_INT that can hold a single pixel.
this(bits, rmask, gmask, bmask, 0);
| public DirectColorModel(int bits, int rmask, int gmask, int bmask, int amask)Constructs a DirectColorModel from the specified masks
that indicate which bits in an int pixel representation
contain the red, green and blue color samples and the alpha sample,
if present. If amask is 0, pixel values do not contain
alpha information and all pixels are treated as opaque, which means
that alpha = 1.0. All of the bits in each mask must
be contiguous and fit in the specified number of least significant bits
of an int pixel representation. Alpha, if present, is not
premultiplied. The ColorSpace is the default sRGB space.
The transparency value is Transparency.OPAQUE if no alpha is
present, or Transparency.TRANSLUCENT otherwise. The transfer type
is the smallest of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT,
or DataBuffer.TYPE_INT that can hold a single pixel.
super (ColorSpace.getInstance(ColorSpace.CS_sRGB),
bits, rmask, gmask, bmask, amask, false,
amask == 0 ? Transparency.OPAQUE : Transparency.TRANSLUCENT,
ColorModel.getDefaultTransferType(bits));
setFields();
| public DirectColorModel(ColorSpace space, int bits, int rmask, int gmask, int bmask, int amask, boolean isAlphaPremultiplied, int transferType)Constructs a DirectColorModel from the specified
parameters. Color components are in the specified
ColorSpace, which must be of type ColorSpace.TYPE_RGB
and have minimum normalized component values which are all 0.0
and maximum values which are all 1.0.
The masks specify which bits in an int pixel
representation contain the red, green and blue color samples and
the alpha sample, if present. If amask is 0, pixel
values do not contain alpha information and all pixels are treated
as opaque, which means that alpha = 1.0. All of the
bits in each mask must be contiguous and fit in the specified number
of least significant bits of an int pixel
representation. If there is alpha, the boolean
isAlphaPremultiplied specifies how to interpret
color and alpha samples in pixel values. If the boolean
is true, color samples are assumed to have been
multiplied by the alpha sample. The transparency value is
Transparency.OPAQUE, if no alpha is present, or
Transparency.TRANSLUCENT otherwise. The transfer type
is the type of primitive array used to represent pixel values and
must be one of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT, or
DataBuffer.TYPE_INT.
super (space, bits, rmask, gmask, bmask, amask,
isAlphaPremultiplied,
amask == 0 ? Transparency.OPAQUE : Transparency.TRANSLUCENT,
transferType);
if (ColorModel.isLinearRGBspace(colorSpace)) {
is_LinearRGB = true;
if (maxBits <= 8) {
lRGBprecision = 8;
tosRGB8LUT = ColorModel.getLinearRGB8TosRGB8LUT();
fromsRGB8LUT8 = ColorModel.getsRGB8ToLinearRGB8LUT();
} else {
lRGBprecision = 16;
tosRGB8LUT = ColorModel.getLinearRGB16TosRGB8LUT();
fromsRGB8LUT16 = ColorModel.getsRGB8ToLinearRGB16LUT();
}
} else if (!is_sRGB) {
for (int i = 0; i < 3; i++) {
// super constructor checks that space is TYPE_RGB
// check here that min/max are all 0.0/1.0
if ((space.getMinValue(i) != 0.0f) ||
(space.getMaxValue(i) != 1.0f)) {
throw new IllegalArgumentException(
"Illegal min/max RGB component value");
}
}
}
setFields();
|
| Methods Summary |
|---|
| public final java.awt.image.ColorModel | coerceData(java.awt.image.WritableRaster raster, boolean isAlphaPremultiplied)Forces the raster data to match the state specified in the
isAlphaPremultiplied variable, assuming the data is
currently correctly described by this ColorModel. It
may multiply or divide the color raster data by alpha, or do
nothing if the data is in the correct state. If the data needs to
be coerced, this method will also return an instance of this
ColorModel with the isAlphaPremultiplied
flag set appropriately. This method will throw a
UnsupportedOperationException if this transferType is
not supported by this ColorModel. Since
ColorModel can be subclassed, subclasses inherit the
implementation of this method and if they don't override it then
they throw an exception if they use an unsupported transferType.
if (!supportsAlpha ||
this.isAlphaPremultiplied() == isAlphaPremultiplied) {
return this;
}
int w = raster.getWidth();
int h = raster.getHeight();
int aIdx = numColorComponents;
float normAlpha;
float alphaScale = 1.0f / ((float) ((1 << nBits[aIdx]) - 1));
int rminX = raster.getMinX();
int rY = raster.getMinY();
int rX;
int pixel[] = null;
int zpixel[] = null;
if (isAlphaPremultiplied) {
// Must mean that we are currently not premultiplied so
// multiply by alpha
switch (transferType) {
case DataBuffer.TYPE_BYTE: {
for (int y = 0; y < h; y++, rY++) {
rX = rminX;
for (int x = 0; x < w; x++, rX++) {
pixel = raster.getPixel(rX, rY, pixel);
normAlpha = pixel[aIdx] * alphaScale;
if (normAlpha != 0.f) {
for (int c=0; c < aIdx; c++) {
pixel[c] = (int) (pixel[c] * normAlpha +
0.5f);
}
raster.setPixel(rX, rY, pixel);
} else {
if (zpixel == null) {
zpixel = new int[numComponents];
java.util.Arrays.fill(zpixel, 0);
}
raster.setPixel(rX, rY, zpixel);
}
}
}
}
break;
case DataBuffer.TYPE_USHORT: {
for (int y = 0; y < h; y++, rY++) {
rX = rminX;
for (int x = 0; x < w; x++, rX++) {
pixel = raster.getPixel(rX, rY, pixel);
normAlpha = pixel[aIdx] * alphaScale;
if (normAlpha != 0.f) {
for (int c=0; c < aIdx; c++) {
pixel[c] = (int) (pixel[c] * normAlpha +
0.5f);
}
raster.setPixel(rX, rY, pixel);
} else {
if (zpixel == null) {
zpixel = new int[numComponents];
java.util.Arrays.fill(zpixel, 0);
}
raster.setPixel(rX, rY, zpixel);
}
}
}
}
break;
case DataBuffer.TYPE_INT: {
for (int y = 0; y < h; y++, rY++) {
rX = rminX;
for (int x = 0; x < w; x++, rX++) {
pixel = raster.getPixel(rX, rY, pixel);
normAlpha = pixel[aIdx] * alphaScale;
if (normAlpha != 0.f) {
for (int c=0; c < aIdx; c++) {
pixel[c] = (int) (pixel[c] * normAlpha +
0.5f);
}
raster.setPixel(rX, rY, pixel);
} else {
if (zpixel == null) {
zpixel = new int[numComponents];
java.util.Arrays.fill(zpixel, 0);
}
raster.setPixel(rX, rY, zpixel);
}
}
}
}
break;
default:
throw new UnsupportedOperationException("This method has not been "+
"implemented for transferType " + transferType);
}
}
else {
// We are premultiplied and want to divide it out
switch (transferType) {
case DataBuffer.TYPE_BYTE: {
for (int y = 0; y < h; y++, rY++) {
rX = rminX;
for (int x = 0; x < w; x++, rX++) {
pixel = raster.getPixel(rX, rY, pixel);
normAlpha = pixel[aIdx] * alphaScale;
if (normAlpha != 0.0f) {
float invAlpha = 1.0f / normAlpha;
for (int c=0; c < aIdx; c++) {
pixel[c] = (int) (pixel[c] * invAlpha +
0.5f);
}
raster.setPixel(rX, rY, pixel);
}
}
}
}
break;
case DataBuffer.TYPE_USHORT: {
for (int y = 0; y < h; y++, rY++) {
rX = rminX;
for (int x = 0; x < w; x++, rX++) {
pixel = raster.getPixel(rX, rY, pixel);
normAlpha = pixel[aIdx] * alphaScale;
if (normAlpha != 0) {
float invAlpha = 1.0f / normAlpha;
for (int c=0; c < aIdx; c++) {
pixel[c] = (int) (pixel[c] * invAlpha +
0.5f);
}
raster.setPixel(rX, rY, pixel);
}
}
}
}
break;
case DataBuffer.TYPE_INT: {
for (int y = 0; y < h; y++, rY++) {
rX = rminX;
for (int x = 0; x < w; x++, rX++) {
pixel = raster.getPixel(rX, rY, pixel);
normAlpha = pixel[aIdx] * alphaScale;
if (normAlpha != 0) {
float invAlpha = 1.0f / normAlpha;
for (int c=0; c < aIdx; c++) {
pixel[c] = (int) (pixel[c] * invAlpha +
0.5f);
}
raster.setPixel(rX, rY, pixel);
}
}
}
}
break;
default:
throw new UnsupportedOperationException("This method has not been "+
"implemented for transferType " + transferType);
}
}
// Return a new color model
return new DirectColorModel(colorSpace, pixel_bits, maskArray[0],
maskArray[1], maskArray[2], maskArray[3],
isAlphaPremultiplied,
transferType);
| | public final java.awt.image.WritableRaster | createCompatibleWritableRaster(int w, int h)Creates a WritableRaster with the specified width and
height that has a data layout (SampleModel) compatible
with this ColorModel.
if ((w <= 0) || (h <= 0)) {
throw new IllegalArgumentException("Width (" + w + ") and height (" + h +
") cannot be <= 0");
}
int[] bandmasks;
if (supportsAlpha) {
bandmasks = new int[4];
bandmasks[3] = alpha_mask;
}
else {
bandmasks = new int[3];
}
bandmasks[0] = red_mask;
bandmasks[1] = green_mask;
bandmasks[2] = blue_mask;
if (pixel_bits > 16) {
return Raster.createPackedRaster(DataBuffer.TYPE_INT,
w,h,bandmasks,null);
}
else if (pixel_bits > 8) {
return Raster.createPackedRaster(DataBuffer.TYPE_USHORT,
w,h,bandmasks,null);
}
else {
return Raster.createPackedRaster(DataBuffer.TYPE_BYTE,
w,h,bandmasks,null);
}
| | public final int | getAlpha(int pixel)Returns the alpha component for the specified pixel, scaled
from 0 to 255. The pixel value is specified as an int.
if (!supportsAlpha) return 255;
int a = ((pixel & maskArray[3]) >>> maskOffsets[3]);
if (scaleFactors[3] != 1.0f) {
a = (int)(a * scaleFactors[3] + 0.5f);
}
return a;
| | public int | getAlpha(java.lang.Object inData)Returns the alpha component for the specified pixel, scaled
from 0 to 255. The pixel value is specified by an array of data
elements of type transferType passed in as an object
reference.
If inData is not a primitive array of type
transferType, a ClassCastException is
thrown. An ArrayIndexOutOfBoundsException is
thrown if inData is not large enough to hold a pixel
value for this ColorModel. Since
DirectColorModel can be subclassed, subclasses inherit
the implementation of this method and if they don't override it
then they throw an exception if they use an unsupported
transferType.
If this transferType is not supported, an
UnsupportedOperationException is thrown.
int pixel=0;
switch (transferType) {
case DataBuffer.TYPE_BYTE:
byte bdata[] = (byte[])inData;
pixel = bdata[0] & 0xff;
break;
case DataBuffer.TYPE_USHORT:
short sdata[] = (short[])inData;
pixel = sdata[0] & 0xffff;
break;
case DataBuffer.TYPE_INT:
int idata[] = (int[])inData;
pixel = idata[0];
break;
default:
throw new UnsupportedOperationException("This method has not been "+
"implemented for transferType " + transferType);
}
return getAlpha(pixel);
| | public final int | getAlphaMask()Returns the mask indicating which bits in an int pixel
representation contain the alpha component.
if (supportsAlpha) {
return maskArray[3];
} else {
return 0;
}
| | public final int | getBlue(int pixel)Returns the blue color component for the specified pixel, scaled
from 0 to 255 in the default RGB ColorSpace, sRGB. A
color conversion is done if necessary. The pixel value is specified
as an int.
The returned value is a non pre-multiplied value. Thus, if the
alpha is premultiplied, this method divides it out before returning
the value. If the alpha value is 0, for example, the blue value
is 0.
if (is_sRGB) {
return getsRGBComponentFromsRGB(pixel, 2);
} else if (is_LinearRGB) {
return getsRGBComponentFromLinearRGB(pixel, 2);
}
float rgb[] = getDefaultRGBComponents(pixel);
return (int) (rgb[2] * 255.0f + 0.5f);
| | public int | getBlue(java.lang.Object inData)Returns the blue color component for the specified pixel, scaled
from 0 to 255 in the default RGB ColorSpace, sRGB. A
color conversion is done if necessary. The pixel value is specified
by an array of data elements of type transferType passed
in as an object reference.
The returned value is a non pre-multiplied value. Thus, if the
alpha is premultiplied, this method divides it out before returning
the value. If the alpha value is 0, for example, the blue value
is 0. If inData is not a primitive array of type
transferType, a ClassCastException is thrown.
An ArrayIndexOutOfBoundsException is
thrown if inData is not large enough to hold a pixel
value for this ColorModel. Since
DirectColorModel can be subclassed, subclasses inherit
the implementation of this method and if they don't override it
then they throw an exception if they use an unsupported
transferType.
An UnsupportedOperationException is
thrown if this transferType is not supported by this
ColorModel.
int pixel=0;
switch (transferType) {
case DataBuffer.TYPE_BYTE:
byte bdata[] = (byte[])inData;
pixel = bdata[0] & 0xff;
break;
case DataBuffer.TYPE_USHORT:
short sdata[] = (short[])inData;
pixel = sdata[0] & 0xffff;
break;
case DataBuffer.TYPE_INT:
int idata[] = (int[])inData;
pixel = idata[0];
break;
default:
throw new UnsupportedOperationException("This method has not been "+
"implemented for transferType " + transferType);
}
return getBlue(pixel);
| | public final int | getBlueMask()Returns the mask indicating which bits in an int pixel
representation contain the blue color component.
return maskArray[2];
| | public final int[] | getComponents(int pixel, int[] components, int offset)Returns an array of unnormalized color/alpha components given a pixel
in this ColorModel. The pixel value is specified as an
int. If the components array is
null, a new array is allocated. The
components array is returned. Color/alpha components are
stored in the components array starting at
offset, even if the array is allocated by this method.
An ArrayIndexOutOfBoundsException is thrown if the
components array is not null and is not large
enough to hold all the color and alpha components, starting at
offset.
if (components == null) {
components = new int[offset+numComponents];
}
for (int i=0; i < numComponents; i++) {
components[offset+i] = (pixel & maskArray[i]) >>> maskOffsets[i];
}
return components;
| | public final int[] | getComponents(java.lang.Object pixel, int[] components, int offset)Returns an array of unnormalized color/alpha components given a pixel
in this ColorModel. The pixel value is specified by an
array of data elements of type transferType passed in as
an object reference. If pixel is not a primitive array
of type transferType, a ClassCastException
is thrown. An ArrayIndexOutOfBoundsException is
thrown if pixel is not large enough to hold a
pixel value for this ColorModel. If the
components array is null, a new
array is allocated. The components array is returned.
Color/alpha components are stored in the components array
starting at offset, even if the array is allocated by
this method. An ArrayIndexOutOfBoundsException
is thrown if the components array is not
null and is not large enough to hold all the color and
alpha components, starting at offset.
Since DirectColorModel can be subclassed, subclasses
inherit the implementation of this method and if they don't
override it then they throw an exception if they use an unsupported
transferType.
int intpixel=0;
switch (transferType) {
case DataBuffer.TYPE_BYTE:
byte bdata[] = (byte[])pixel;
intpixel = bdata[0] & 0xff;
break;
case DataBuffer.TYPE_USHORT:
short sdata[] = (short[])pixel;
intpixel = sdata[0] & 0xffff;
break;
case DataBuffer.TYPE_INT:
int idata[] = (int[])pixel;
intpixel = idata[0];
break;
default:
throw new UnsupportedOperationException("This method has not been "+
"implemented for transferType " + transferType);
}
return getComponents(intpixel, components, offset);
| | public int | getDataElement(int[] components, int offset)Returns a pixel value represented as an int in this
ColorModel, given an array of unnormalized color/alpha
components. An ArrayIndexOutOfBoundsException is
thrown if the components array is
not large enough to hold all the color and alpha components, starting
at offset.
int pixel = 0;
for (int i=0; i < numComponents; i++) {
pixel |= ((components[offset+i]<<maskOffsets[i])&maskArray[i]);
}
return pixel;
| | public java.lang.Object | getDataElements(int rgb, java.lang.Object pixel)Returns a data element array representation of a pixel in this
ColorModel, given an integer pixel representation in the
default RGB color model.
This array can then be passed to the setDataElements
method of a WritableRaster object. If the pixel variable
is null, a new array is allocated. If pixel
is not null, it must be a primitive array of type
transferType; otherwise, a
ClassCastException is thrown. An
ArrayIndexOutOfBoundsException is
thrown if pixel is not large enough to hold a pixel
value for this ColorModel. The pixel array is returned.
Since DirectColorModel can be subclassed, subclasses
inherit the implementation of this method and if they don't
override it then they throw an exception if they use an unsupported
transferType.
//REMIND: maybe more efficient not to use int array for
//DataBuffer.TYPE_USHORT and DataBuffer.TYPE_INT
int intpixel[] = null;
if (transferType == DataBuffer.TYPE_INT &&
pixel != null) {
intpixel = (int[])pixel;
intpixel[0] = 0;
} else {
intpixel = new int[1];
}
ColorModel defaultCM = ColorModel.getRGBdefault();
if (this == defaultCM || equals(defaultCM)) {
intpixel[0] = rgb;
return intpixel;
}
int red, grn, blu, alp;
red = (rgb>>16) & 0xff;
grn = (rgb>>8) & 0xff;
blu = rgb & 0xff;
if (is_sRGB || is_LinearRGB) {
int precision;
float factor;
if (is_LinearRGB) {
if (lRGBprecision == 8) {
red = fromsRGB8LUT8[red] & 0xff;
grn = fromsRGB8LUT8[grn] & 0xff;
blu = fromsRGB8LUT8[blu] & 0xff;
precision = 8;
factor = 1.0f / 255.0f;
} else {
red = fromsRGB8LUT16[red] & 0xffff;
grn = fromsRGB8LUT16[grn] & 0xffff;
blu = fromsRGB8LUT16[blu] & 0xffff;
precision = 16;
factor = 1.0f / 65535.0f;
}
} else {
precision = 8;
factor = 1.0f / 255.0f;
}
if (supportsAlpha) {
alp = (rgb>>24) & 0xff;
if (isAlphaPremultiplied) {
factor *= (alp * (1.0f / 255.0f));
precision = -1; // force component calculations below
}
if (nBits[3] != 8) {
alp = (int)
((alp * (1.0f / 255.0f) * ((1<<nBits[3]) - 1)) + 0.5f);
if (alp > ((1<<nBits[3]) - 1)) {
// fix 4412670 - see comment below
alp = (1<<nBits[3]) - 1;
}
}
intpixel[0] = alp << maskOffsets[3];
}
if (nBits[0] != precision) {
red = (int) ((red * factor * ((1<<nBits[0]) - 1)) + 0.5f);
}
if (nBits[1] != precision) {
grn = (int) ((grn * factor * ((1<<nBits[1]) - 1)) + 0.5f);
}
if (nBits[2] != precision) {
blu = (int) ((blu * factor * ((1<<nBits[2]) - 1)) + 0.5f);
}
} else {
// Need to convert the color
float[] norm = new float[3];
float factor = 1.0f / 255.0f;
norm[0] = red * factor;
norm[1] = grn * factor;
norm[2] = blu * factor;
norm = colorSpace.fromRGB(norm);
if (supportsAlpha) {
alp = (rgb>>24) & 0xff;
if (isAlphaPremultiplied) {
factor *= alp;
for (int i = 0; i < 3; i++) {
norm[i] *= factor;
}
}
if (nBits[3] != 8) {
alp = (int)
((alp * (1.0f / 255.0f) * ((1<<nBits[3]) - 1)) + 0.5f);
if (alp > ((1<<nBits[3]) - 1)) {
// fix 4412670 - see comment below
alp = (1<<nBits[3]) - 1;
}
}
intpixel[0] = alp << maskOffsets[3];
}
red = (int) ((norm[0] * ((1<<nBits[0]) - 1)) + 0.5f);
grn = (int) ((norm[1] * ((1<<nBits[1]) - 1)) + 0.5f);
blu = (int) ((norm[2] * ((1<<nBits[2]) - 1)) + 0.5f);
}
if (maxBits > 23) {
// fix 4412670 - for components of 24 or more bits
// some calculations done above with float precision
// may lose enough precision that the integer result
// overflows nBits, so we need to clamp.
if (red > ((1<<nBits[0]) - 1)) {
red = (1<<nBits[0]) - 1;
}
if (grn > ((1<<nBits[1]) - 1)) {
grn = (1<<nBits[1]) - 1;
}
if (blu > ((1<<nBits[2]) - 1)) {
blu = (1<<nBits[2]) - 1;
}
}
intpixel[0] |= (red << maskOffsets[0]) |
(grn << maskOffsets[1]) |
(blu << maskOffsets[2]);
switch (transferType) {
case DataBuffer.TYPE_BYTE: {
byte bdata[];
if (pixel == null) {
bdata = new byte[1];
} else {
bdata = (byte[])pixel;
}
bdata[0] = (byte)(0xff&intpixel[0]);
return bdata;
}
case DataBuffer.TYPE_USHORT:{
short sdata[];
if (pixel == null) {
sdata = new short[1];
} else {
sdata = (short[])pixel;
}
sdata[0] = (short)(intpixel[0]&0xffff);
return sdata;
}
case DataBuffer.TYPE_INT:
return intpixel;
}
throw new UnsupportedOperationException("This method has not been "+
"implemented for transferType " + transferType);
| | public java.lang.Object | getDataElements(int[] components, int offset, java.lang.Object obj)Returns a data element array representation of a pixel in this
ColorModel, given an array of unnormalized color/alpha
components.
This array can then be passed to the setDataElements
method of a WritableRaster object.
An ArrayIndexOutOfBoundsException is thrown if the
components array
is not large enough to hold all the color and alpha components,
starting at offset. If the obj variable is
null, a new array is allocated. If obj is
not null, it must be a primitive array
of type transferType; otherwise, a
ClassCastException is thrown.
An ArrayIndexOutOfBoundsException is thrown if
obj is not large enough to hold a pixel value for this
ColorModel.
Since DirectColorModel can be subclassed, subclasses
inherit the implementation of this method and if they don't
override it then they throw an exception if they use an unsupported
transferType.
int pixel = 0;
for (int i=0; i < numComponents; i++) {
pixel |= ((components[offset+i]<<maskOffsets[i])&maskArray[i]);
}
switch (transferType) {
case DataBuffer.TYPE_BYTE:
if (obj instanceof byte[]) {
byte bdata[] = (byte[])obj;
bdata[0] = (byte)(pixel&0xff);
return bdata;
} else {
byte bdata[] = {(byte)(pixel&0xff)};
return bdata;
}
case DataBuffer.TYPE_USHORT:
if (obj instanceof short[]) {
short sdata[] = (short[])obj;
sdata[0] = (short)(pixel&0xffff);
return sdata;
} else {
short sdata[] = {(short)(pixel&0xffff)};
return sdata;
}
case DataBuffer.TYPE_INT:
if (obj instanceof int[]) {
int idata[] = (int[])obj;
idata[0] = pixel;
return idata;
} else {
int idata[] = {pixel};
return idata;
}
default:
throw new ClassCastException("This method has not been "+
"implemented for transferType " + transferType);
}
| | private float[] | getDefaultRGBComponents(int pixel)
int components[] = getComponents(pixel, null, 0);
float norm[] = getNormalizedComponents(components, 0, null, 0);
// Note that getNormalizedComponents returns non-premultiplied values
return colorSpace.toRGB(norm);
| | public final int | getGreen(int pixel)Returns the green color component for the specified pixel, scaled
from 0 to 255 in the default RGB ColorSpace, sRGB. A
color conversion is done if necessary. The pixel value is specified
as an int.
The returned value is a non pre-multiplied value. Thus, if the
alpha is premultiplied, this method divides it out before returning
the value. If the alpha value is 0, for example, the green value
is 0.
if (is_sRGB) {
return getsRGBComponentFromsRGB(pixel, 1);
} else if (is_LinearRGB) {
return getsRGBComponentFromLinearRGB(pixel, 1);
}
float rgb[] = getDefaultRGBComponents(pixel);
return (int) (rgb[1] * 255.0f + 0.5f);
| | public int | getGreen(java.lang.Object inData)Returns the green color component for the specified pixel, scaled
from 0 to 255 in the default RGB ColorSpace, sRGB. A
color conversion is done if necessary. The pixel value is specified
by an array of data elements of type transferType passed
in as an object reference.
The returned value is a non pre-multiplied value. Thus, if the
alpha is premultiplied, this method divides it out before returning
the value. If the alpha value is 0, for example, the green value
is 0. If inData is not a primitive array of type
transferType, a ClassCastException is thrown.
An ArrayIndexOutOfBoundsException is
thrown if inData is not large enough to hold a pixel
value for this ColorModel. Since
DirectColorModel can be subclassed, subclasses inherit
the implementation of this method and if they don't override it
then they throw an exception if they use an unsupported
transferType.
An UnsupportedOperationException is
thrown if this transferType is not supported by this
ColorModel.
int pixel=0;
switch (transferType) {
case DataBuffer.TYPE_BYTE:
byte bdata[] = (byte[])inData;
pixel = bdata[0] & 0xff;
break;
case DataBuffer.TYPE_USHORT:
short sdata[] = (short[])inData;
pixel = sdata[0] & 0xffff;
break;
case DataBuffer.TYPE_INT:
int idata[] = (int[])inData;
pixel = idata[0];
break;
default:
throw new UnsupportedOperationException("This method has not been "+
"implemented for transferType " + transferType);
}
return getGreen(pixel);
| | public final int | getGreenMask()Returns the mask indicating which bits in an int pixel
representation contain the green color component.
return maskArray[1];
| | public final int | getRGB(int pixel)Returns the color/alpha components of the pixel in the default
RGB color model format. A color conversion is done if necessary.
The pixel value is specified as an int.
The returned value is in a non pre-multiplied format. Thus, if
the alpha is premultiplied, this method divides it out of the
color components. If the alpha value is 0, for example, the color
values are each 0.
if (is_sRGB || is_LinearRGB) {
return (getAlpha(pixel) << 24)
| (getRed(pixel) << 16)
| (getGreen(pixel) << 8)
| (getBlue(pixel) << 0);
}
float rgb[] = getDefaultRGBComponents(pixel);
return (getAlpha(pixel) << 24)
| (((int) (rgb[0] * 255.0f + 0.5f)) << 16)
| (((int) (rgb[1] * 255.0f + 0.5f)) << 8)
| (((int) (rgb[2] * 255.0f + 0.5f)) << 0);
| | public int | getRGB(java.lang.Object inData)Returns the color/alpha components for the specified pixel in the
default RGB color model format. A color conversion is done if
necessary. The pixel value is specified by an array of data
elements of type transferType passed in as an object
reference. If inData is not a primitive array of type
transferType, a ClassCastException is
thrown. An ArrayIndexOutOfBoundsException is
thrown if inData is not large enough to hold a pixel
value for this ColorModel.
The returned value is in a non pre-multiplied format. Thus, if
the alpha is premultiplied, this method divides it out of the
color components. If the alpha value is 0, for example, the color
values is 0. Since DirectColorModel can be
subclassed, subclasses inherit the implementation of this method
and if they don't override it then
they throw an exception if they use an unsupported
transferType.
int pixel=0;
switch (transferType) {
case DataBuffer.TYPE_BYTE:
byte bdata[] = (byte[])inData;
pixel = bdata[0] & 0xff;
break;
case DataBuffer.TYPE_USHORT:
short sdata[] = (short[])inData;
pixel = sdata[0] & 0xffff;
break;
case DataBuffer.TYPE_INT:
int idata[] = (int[])inData;
pixel = idata[0];
break;
default:
throw new UnsupportedOperationException("This method has not been "+
"implemented for transferType " + transferType);
}
return getRGB(pixel);
| | public final int | getRed(int pixel)Returns the red color component for the specified pixel, scaled
from 0 to 255 in the default RGB ColorSpace, sRGB. A
color conversion is done if necessary. The pixel value is specified
as an int.
The returned value is a non pre-multiplied value. Thus, if the
alpha is premultiplied, this method divides it out before returning
the value. If the alpha value is 0, for example, the red value
is 0.
if (is_sRGB) {
return getsRGBComponentFromsRGB(pixel, 0);
} else if (is_LinearRGB) {
return getsRGBComponentFromLinearRGB(pixel, 0);
}
float rgb[] = getDefaultRGBComponents(pixel);
return (int) (rgb[0] * 255.0f + 0.5f);
| | public int | getRed(java.lang.Object inData)Returns the red color component for the specified pixel, scaled
from 0 to 255 in the default RGB ColorSpace, sRGB. A
color conversion is done if necessary. The pixel value is specified
by an array of data elements of type transferType passed
in as an object reference.
The returned value is a non pre-multiplied value. Thus, if the
alpha is premultiplied, this method divides it out before returning
the value. If the alpha value is 0, for example, the red value
is 0.
If inData is not a primitive array of type
transferType, a ClassCastException is
thrown. An ArrayIndexOutOfBoundsException is
thrown if inData is not large enough to hold a
pixel value for this ColorModel. Since
DirectColorModel can be subclassed, subclasses inherit
the implementation of this method and if they don't override it
then they throw an exception if they use an unsupported
transferType.
An UnsupportedOperationException is thrown if this
transferType is not supported by this
ColorModel.
int pixel=0;
switch (transferType) {
case DataBuffer.TYPE_BYTE:
byte bdata[] = (byte[])inData;
pixel = bdata[0] & 0xff;
break;
case DataBuffer.TYPE_USHORT:
short sdata[] = (short[])inData;
pixel = sdata[0] & 0xffff;
break;
case DataBuffer.TYPE_INT:
int idata[] = (int[])inData;
pixel = idata[0];
break;
default:
throw new UnsupportedOperationException("This method has not been "+
"implemented for transferType " + transferType);
}
return getRed(pixel);
| | public final int | getRedMask()Returns the mask indicating which bits in an int pixel
representation contain the red color component.
return maskArray[0];
| | private int | getsRGBComponentFromLinearRGB(int pixel, int idx)
int c = ((pixel & maskArray[idx]) >>> maskOffsets[idx]);
if (isAlphaPremultiplied) {
float factor = (float) ((1 << lRGBprecision) - 1);
int a = ((pixel & maskArray[3]) >>> maskOffsets[3]);
c = (a == 0) ? 0 :
(int) (((c * scaleFactors[idx]) * factor /
(a * scaleFactors[3])) + 0.5f);
} else if (nBits[idx] != lRGBprecision) {
if (lRGBprecision == 16) {
c = (int) ((c * scaleFactors[idx] * 257.0f) + 0.5f);
} else {
c = (int) ((c * scaleFactors[idx]) + 0.5f);
}
}
// now range of c is 0-255 or 0-65535, depending on lRGBprecision
return tosRGB8LUT[c] & 0xff;
| | private int | getsRGBComponentFromsRGB(int pixel, int idx)
int c = ((pixel & maskArray[idx]) >>> maskOffsets[idx]);
if (isAlphaPremultiplied) {
int a = ((pixel & maskArray[3]) >>> maskOffsets[3]);
c = (a == 0) ? 0 :
(int) (((c * scaleFactors[idx]) * 255.0f /
(a * scaleFactors[3])) + 0.5f);
} else if (scaleFactors[idx] != 1.0f) {
c = (int) ((c * scaleFactors[idx]) + 0.5f);
}
return c;
| | public boolean | isCompatibleRaster(java.awt.image.Raster raster)Returns true if raster is compatible
with this ColorModel and false if it is
not.
SampleModel sm = raster.getSampleModel();
SinglePixelPackedSampleModel spsm;
if (sm instanceof SinglePixelPackedSampleModel) {
spsm = (SinglePixelPackedSampleModel) sm;
}
else {
return false;
}
if (spsm.getNumBands() != getNumComponents()) {
return false;
}
int[] bitMasks = spsm.getBitMasks();
for (int i=0; i<numComponents; i++) {
if (bitMasks[i] != maskArray[i]) {
return false;
}
}
return (raster.getTransferType() == transferType);
| | private void | setFields()
// Set the private fields
// REMIND: Get rid of these from the native code
red_mask = maskArray[0];
red_offset = maskOffsets[0];
green_mask = maskArray[1];
green_offset = maskOffsets[1];
blue_mask = maskArray[2];
blue_offset = maskOffsets[2];
if (nBits[0] < 8) {
red_scale = (1 << nBits[0]) - 1;
}
if (nBits[1] < 8) {
green_scale = (1 << nBits[1]) - 1;
}
if (nBits[2] < 8) {
blue_scale = (1 << nBits[2]) - 1;
}
if (supportsAlpha) {
alpha_mask = maskArray[3];
alpha_offset = maskOffsets[3];
if (nBits[3] < 8) {
alpha_scale = (1 << nBits[3]) - 1;
}
}
| | public java.lang.String | toString()Returns a String that represents this
DirectColorModel.
return new String("DirectColorModel: rmask="
+Integer.toHexString(red_mask)+" gmask="
+Integer.toHexString(green_mask)+" bmask="
+Integer.toHexString(blue_mask)+" amask="
+Integer.toHexString(alpha_mask));
|
|
