getRGBdefault of this
- * class.
- * @param b the number of bits wide used for bit size of pixel values
- */
- public ColorModel(int bits)
- {
- this(bits * 4, // total bits, sRGB, four channels
- nArray(bits, 4), // bits for each channel
- null, // FIXME: should be sRGB
- true, // has alpha
- false, // not premultiplied
- TRANSLUCENT,
- Buffers.smallestAppropriateTransferType(bits * 4));
- }
-
- protected ColorModel(int pixel_bits, int[] bits, ColorSpace cspace,
- boolean hasAlpha, boolean isAlphaPremultiplied,
- int transparency, int transferType)
- {
- this.pixel_bits = pixel_bits;
- this.bits = bits;
- this.cspace = cspace;
- this.hasAlpha = hasAlpha;
- this.isAlphaPremultiplied = isAlphaPremultiplied;
- this.transparency = transparency;
- this.transferType = transferType;
- }
-
- /**
- * Returns the default color model which in Sun's case is an instance
- * of DirectColorModel.
- */
- public static ColorModel getRGBdefault()
- {
- return new DirectColorModel(8, 0xff0000, 0xff00, 0xff, 0xff000000);
- }
-
- public final boolean hasAlpha()
- {
- return hasAlpha;
- }
-
- public final boolean isAlphaPremultiplied()
- {
- return isAlphaPremultiplied;
- }
-
- /**
- * Get get number of bits wide used for the bit size of pixel values
- */
- public int getPixelSize()
- {
- return pixel_bits;
- }
-
- public int getComponentSize(int componentIdx)
- {
- return bits[componentIdx];
- }
-
- public int[] getComponentSize()
- {
- return bits;
- }
-
- public int getTransparency()
- {
- return transparency;
- }
-
- public int getNumComponents()
- {
- return getNumColorComponents() + (hasAlpha ? 1 : 0);
- }
-
- public int getNumColorComponents()
- {
- return cspace.getNumComponents();
- }
-
- /**
- * Converts pixel value to sRGB and extract red int sample scaled
- * to range [0, 255].
- *
- * @param pixel pixel value that will be interpreted according to
- * the color model, (assumed alpha premultiplied if color model says
- * so.)
- *
- * @return red sample scaled to range [0, 255], from default color
- * space sRGB, alpha non-premultiplied.
- */
- public abstract int getRed(int pixel);
-
- /**
- * Converts pixel value to sRGB and extract green int sample
- * scaled to range [0, 255].
- *
- * @see #getRed(int)
- */
- public abstract int getGreen(int pixel);
-
- /**
- * Converts pixel value to sRGB and extract blue int sample
- * scaled to range [0, 255].
- *
- * @see #getRed(int)
- */
- public abstract int getBlue(int pixel);
-
- /**
- * Extract alpha int sample from pixel value, scaled to [0, 255].
- *
- * @param pixel pixel value that will be interpreted according to
- * the color model.
- *
- * @return alpha sample, scaled to range [0, 255].
- */
- public abstract int getAlpha(int pixel);
-
- /**
- * Converts a pixel int value of the color space of the color
- * model to a sRGB pixel int value.
- *
- * This method is typically overriden in subclasses to provide a
- * more efficient implementation.
- *
- * @param pixel pixel value that will be interpreted according to
- * the color model.
- *
- * @return a pixel in sRGB color space, encoded in default
- * 0xAARRGGBB format. */
- public int getRGB(int pixel)
- {
- return
- ((getAlpha(pixel) & 0xff) << 24) |
- (( getRed(pixel) & 0xff) << 16) |
- ((getGreen(pixel) & 0xff) << 8) |
- (( getBlue(pixel) & 0xff) << 0);
- }
-
-
- /**
- * In this color model we know that the whole pixel value will
- * always be contained within the first element of the pixel
- * array.
- */
- final int getPixelFromArray(Object inData) {
- DataBuffer data =
- Buffers.createBufferFromData(transferType, inData, 1);
- Object da = Buffers.getData(data);
-
- return data.getElem(0);
- }
-
- /**
- * Converts pixel in the given array to sRGB and extract blue int
- * sample scaled to range [0-255].
- *
- * This method is typically overriden in subclasses to provide a
- * more efficient implementation.
- *
- * @param array of transferType containing a single pixel. The
- * pixel should be encoded in the natural way of the color model.
- */
- public int getRed(Object inData)
- {
- return getRed(getPixelFromArray(inData));
- }
-
- /**
- * @see #getRed(Object)
- */
- public int getGreen(Object inData)
- {
- return getGreen(getPixelFromArray(inData));
- }
-
- /**
- * @see #getRed(Object)
- */
- public int getBlue(Object inData) {
- return getBlue(getPixelFromArray(inData));
- }
-
- /**
- * @see #getRed(Object)
- */
- public int getAlpha(Object inData) {
- return getAlpha(getPixelFromArray(inData));
- }
-
- /**
- * Converts a pixel in the given array of the color space of the
- * color model to an sRGB pixel int value.
- *
- * This method performs the inverse function of
- * getDataElements(int rgb, Object pixel).
- * I.e. (rgb == cm.getRGB(cm.getDataElements(rgb,
- * null))).
- *
- * @param inData array of transferType containing a single pixel. The
- * pixel should be encoded in the natural way of the color model.
- *
- * @return a pixel in sRGB color space, encoded in default
- * 0xAARRGGBB format.
- *
- * @see #getDataElements(int, Object)
- */
- public int getRGB(Object inData)
- {
- return
- ((getAlpha(inData) & 0xff) << 24) |
- (( getRed(inData) & 0xff) << 16) |
- ((getGreen(inData) & 0xff) << 8) |
- (( getBlue(inData) & 0xff) << 0);
- }
-
- /**
- * Converts an sRGB pixel int value to an array containing a
- * single pixel of the color space of the color model.
- *
- *
This method performs the inverse function of
- * getRGB(Object inData).
- *
- * Outline of conversion process:
- *
- *
(pixel == cm.getDataElement(cm.getComponents(pixel, null,
- * 0), 0)).
- *
- * This method is typically overriden in subclasses to provide a
- * more efficient implementation.
- *
- * @param arrays of unnormalized component samples of single
- * pixel. The scale and multiplication state of the samples are
- * according to the color model. Each component sample is stored
- * as a separate element in the array.
- *
- * @return pixel value encoded according to the color model.
- */
- public int getDataElement(int[] components, int offset)
- {
- throw new UnsupportedOperationException();
- }
-
- public Object getDataElements(int[] components, int offset, Object obj)
- {
- throw new UnsupportedOperationException();
- }
-
- public boolean equals(Object obj)
- {
- if (!(obj instanceof ColorModel)) return false;
-
- ColorModel o = (ColorModel) obj;
- return
- (pixel_bits == o.pixel_bits) &&
- (transferType == o.transferType) &&
- (transparency == o.transparency) &&
- (hasAlpha == o.hasAlpha) &&
- (isAlphaPremultiplied == isAlphaPremultiplied) &&
- (bits.equals(o.bits)) &&
- (cspace.equals(o.cspace));
- }
-
- public final ColorSpace getColorSpace()
- {
- return cspace;
- }
-
- // Typically overridden
- public ColorModel coerceData(WritableRaster raster,
- boolean isAlphaPremultiplied)
- {
- if (this.isAlphaPremultiplied == isAlphaPremultiplied)
- return this;
-
- int w = raster.getWidth();
- int h = raster.getHeight();
- int x = raster.getMinX();
- int y = raster.getMinY();
- int size = w*h;
- int numColors = getNumColorComponents();
- int numComponents = getNumComponents();
- int alphaScale = (1<