imageutil.java

JAVA 所有包

                                  ((binaryDataArray[b++] & 0xFF) << 16) |
                                  ((binaryDataArray[b++] & 0xFF) << 8) |
                                  (binaryDataArray[b++] & 0xFF));
                        xRemaining -= 32;
                    }
                    int shift = 24;
                    while(xRemaining > 0) {
                        data[i] |=
                            (int)((binaryDataArray[b++] & 0xFF) << shift);
                        shift -= 8;
                        xRemaining -= 8;
                    }
                    eltOffset += lineStride;
                }
            }
        } else { // bitOffset != 0
            int stride = (rectWidth + 7)/8;
            int offset = 0;
            if(dataBuffer instanceof DataBufferByte) {
                byte[] data = ((DataBufferByte)dataBuffer).getData();

                if((bitOffset & 7) == 0) {
                    for(int y = 0; y < rectHeight; y++) {
                        System.arraycopy(binaryDataArray, offset,
                                         data, eltOffset,
                                         stride);
                        offset += stride;
                        eltOffset += lineStride;
                    }
                } else { // bitOffset % 8 != 0
                    int rightShift = bitOffset & 7;
                    int leftShift = 8 - rightShift;
                    int leftShift8 = 8 + leftShift;
		    int mask = (byte)(255<<leftShift);
		    int mask1 = (byte)~mask;

                    for(int y = 0; y < rectHeight; y++) {
                        int i = eltOffset;
                        int xRemaining = rectWidth;
                        while(xRemaining > 0) {
                            byte datum = binaryDataArray[b++];

                            if (xRemaining > leftShift8) {
				// when all the bits in this BYTE will be set
				// into the data buffer.
                                data[i] = (byte)((data[i] & mask ) |
                                    ((datum&0xFF) >>> rightShift));
                                data[++i] = (byte)((datum & 0xFF) << leftShift);
                            } else if (xRemaining > leftShift) {
				// All the "leftShift" high bits will be set
				// into the data buffer.  But not all the
				// "rightShift" low bits will be set.
				data[i] = (byte)((data[i] & mask ) |
				    ((datum&0xFF) >>> rightShift));
				i++;
				data[i] =
				    (byte)((data[i] & mask1) | ((datum & 0xFF) << leftShift));
			    }
			    else {
				// Less than "leftShift" high bits will be set.
				int remainMask = (1 << leftShift - xRemaining) - 1;
                                data[i] =
                                    (byte)((data[i] & (mask | remainMask)) |
				    (datum&0xFF) >>> rightShift & ~remainMask);
                            }
                            xRemaining -= 8;
                        }
                        eltOffset += lineStride;
                    }
                }
            } else if(dataBuffer instanceof DataBufferShort ||
                      dataBuffer instanceof DataBufferUShort) {
                short[] data = dataBuffer instanceof DataBufferShort ?
                    ((DataBufferShort)dataBuffer).getData() :
                    ((DataBufferUShort)dataBuffer).getData();

		int rightShift = bitOffset & 7;
		int leftShift = 8 - rightShift;
                int leftShift16 = 16 + leftShift;
		int mask = (short)(~(255 << leftShift));
		int mask1 = (short)(65535 << leftShift);
		int mask2 = (short)~mask1;

                for(int y = 0; y < rectHeight; y++) {
                    int bOffset = bitOffset;
		    int xRemaining = rectWidth;
                    for(int x = 0; x < rectWidth;
			x += 8, bOffset += 8, xRemaining -= 8) {
                        int i = eltOffset + (bOffset >> 4);
                        int mod = bOffset & 15;
                        int datum = binaryDataArray[b++] & 0xFF;
                        if(mod <= 8) {
			    // This BYTE is set into one SHORT
			    if (xRemaining < 8) {
				// Mask the bits to be set.
				datum &= 255 << 8 - xRemaining;
			    }
                            data[i] = (short)((data[i] & mask) | (datum << leftShift));
                        } else if (xRemaining > leftShift16) {
			    // This BYTE will be set into two SHORTs
                            data[i] = (short)((data[i] & mask1) | ((datum >>> rightShift)&0xFFFF));
                            data[++i] =
                                (short)((datum << leftShift)&0xFFFF);
                        } else if (xRemaining > leftShift) {
			    // This BYTE will be set into two SHORTs;
			    // But not all the low bits will be set into SHORT
			    data[i] = (short)((data[i] & mask1) | ((datum >>> rightShift)&0xFFFF));
			    i++;
			    data[i] =
			        (short)((data[i] & mask2) | ((datum << leftShift)&0xFFFF));
			} else {
			    // Only some of the high bits will be set into
			    // SHORTs
			    int remainMask = (1 << leftShift - xRemaining) - 1;
			    data[i] = (short)((data[i] & (mask1 | remainMask)) |
				      ((datum >>> rightShift)&0xFFFF & ~remainMask));
			}
                    }
                    eltOffset += lineStride;
                }
            } else if(dataBuffer instanceof DataBufferInt) {
                int[] data = ((DataBufferInt)dataBuffer).getData();
                int rightShift = bitOffset & 7;
		int leftShift = 8 - rightShift;
		int leftShift32 = 32 + leftShift;
		int mask = 0xFFFFFFFF << leftShift;
		int mask1 = ~mask;

                for(int y = 0; y < rectHeight; y++) {
                    int bOffset = bitOffset;
		    int xRemaining = rectWidth;
                    for(int x = 0; x < rectWidth;
			x += 8, bOffset += 8, xRemaining -= 8) {
                        int i = eltOffset + (bOffset >> 5);
                        int mod = bOffset & 31;
                        int datum = binaryDataArray[b++] & 0xFF;
                        if(mod <= 24) {
			    // This BYTE is set into one INT
			    int shift = 24 - mod;
			    if (xRemaining < 8) {
				// Mask the bits to be set.
				datum &= 255 << 8 - xRemaining;
			    }
                            data[i] = (data[i] & (~(255 << shift))) | (datum << shift);
                        } else if (xRemaining > leftShift32) {
			    // All the bits of this BYTE will be set into two INTs
                            data[i] = (data[i] & mask) | (datum >>> rightShift);
                            data[++i] = datum << leftShift;
                        } else if (xRemaining > leftShift) {
			    // This BYTE will be set into two INTs;
			    // But not all the low bits will be set into INT
                            data[i] = (data[i] & mask) | (datum >>> rightShift);
			    i++;
                            data[i] = (data[i] & mask1) | (datum << leftShift);
                        } else {
			    // Only some of the high bits will be set into INT
			    int remainMask = (1 << leftShift - xRemaining) - 1;
			    data[i] = (data[i] & (mask | remainMask)) |
				      (datum >>> rightShift & ~remainMask);
			}
                    }
                    eltOffset += lineStride;
                }
            }
        }
    }

    /**
     * Copies data into the packed array of the <code>Raster</code>
     * from an array of unpacked data of the form returned by
     * <code>getUnpackedBinaryData()</code>.
     *
     * <p> If the data are binary, then the target bit will be set if
     * and only if the corresponding byte is non-zero.
     *
     * @throws IllegalArgumentException if <code>isBinary()</code> returns
     * <code>false</code> with the <code>SampleModel</code> of the
     * supplied <code>Raster</code> as argument.
     */
    public static void setUnpackedBinaryData(byte[] bdata,
                                             WritableRaster raster,
                                             Rectangle rect) {
        SampleModel sm = raster.getSampleModel();
        if(!isBinary(sm)) {
            throw new IllegalArgumentException(I18N.getString("ImageUtil0"));
        }

        int rectX = rect.x;
        int rectY = rect.y;
        int rectWidth = rect.width;
        int rectHeight = rect.height;

        DataBuffer dataBuffer = raster.getDataBuffer();

        int dx = rectX - raster.getSampleModelTranslateX();
        int dy = rectY - raster.getSampleModelTranslateY();

        MultiPixelPackedSampleModel mpp = (MultiPixelPackedSampleModel)sm;
        int lineStride = mpp.getScanlineStride();
        int eltOffset = dataBuffer.getOffset() + mpp.getOffset(dx, dy);
        int bitOffset = mpp.getBitOffset(dx);

        int k = 0;

        if(dataBuffer instanceof DataBufferByte) {
            byte[] data = ((DataBufferByte)dataBuffer).getData();
            for(int y = 0; y < rectHeight; y++) {
                int bOffset = eltOffset*8 + bitOffset;
                for(int x = 0; x < rectWidth; x++) {
                    if(bdata[k++] != (byte)0) {
                        data[bOffset/8] |=
                            (byte)(0x00000001 << (7 - bOffset & 7));
                    }
                    bOffset++;
                }
                eltOffset += lineStride;
            }
        } else if(dataBuffer instanceof DataBufferShort ||
                  dataBuffer instanceof DataBufferUShort) {
            short[] data = dataBuffer instanceof DataBufferShort ?
                ((DataBufferShort)dataBuffer).getData() :
                ((DataBufferUShort)dataBuffer).getData();
            for(int y = 0; y < rectHeight; y++) {
                int bOffset = eltOffset*16 + bitOffset;
                for(int x = 0; x < rectWidth; x++) {
                    if(bdata[k++] != (byte)0) {
                        data[bOffset/16] |=
                            (short)(0x00000001 <<
                                    (15 - bOffset % 16));
                    }
                    bOffset++;
                }
                eltOffset += lineStride;
            }
        } else if(dataBuffer instanceof DataBufferInt) {
            int[] data = ((DataBufferInt)dataBuffer).getData();
            for(int y = 0; y < rectHeight; y++) {
                int bOffset = eltOffset*32 + bitOffset;
                for(int x = 0; x < rectWidth; x++) {
                    if(bdata[k++] != (byte)0) {
                        data[bOffset/32] |=
                            (int)(0x00000001 <<
                                  (31 - bOffset % 32));
                    }
                    bOffset++;
                }
                eltOffset += lineStride;
            }
        }
    }

    public static boolean isBinary(SampleModel sm) {
        return sm instanceof MultiPixelPackedSampleModel &&
            ((MultiPixelPackedSampleModel)sm).getPixelBitStride() == 1 &&
            sm.getNumBands() == 1;
    }

    public static ColorModel createColorModel(ColorSpace colorSpace,
                                              SampleModel sampleModel) {
        ColorModel colorModel = null;

        if(sampleModel == null) {
            throw new IllegalArgumentException(I18N.getString("ImageUtil1"));
        }

        int numBands = sampleModel.getNumBands();
        if (numBands < 1 || numBands > 4) {
            return null;
        }

        int dataType = sampleModel.getDataType();
        if (sampleModel instanceof ComponentSampleModel) {
            if (dataType < DataBuffer.TYPE_BYTE ||
                //dataType == DataBuffer.TYPE_SHORT ||
                dataType > DataBuffer.TYPE_DOUBLE) {
                return null;
            }

            if (colorSpace == null)
                colorSpace =
                    numBands <= 2 ?
                    ColorSpace.getInstance(ColorSpace.CS_GRAY) :
                    ColorSpace.getInstance(ColorSpace.CS_sRGB);

            boolean useAlpha = (numBands == 2) || (numBands == 4);
            int transparency = useAlpha ?
                               Transparency.TRANSLUCENT : Transparency.OPAQUE;

            boolean premultiplied = false;