Examples of ae.java.awt.image.Raster

ae.java.awt.image.Raster
A class representing a rectangular array of pixels. A Raster encapsulates a DataBuffer that stores the sample values and a SampleModel that describes how to locate a given sample value in a DataBuffer.
A Raster defines values for pixels occupying a particular rectangular area of the plane, not necessarily including (0, 0). The rectangle, known as the Raster's bounding rectangle and available by means of the getBounds method, is defined by minX, minY, width, and height values. The minX and minY values define the coordinate of the upper left corner of the Raster. References to pixels outside of the bounding rectangle may result in an exception being thrown, or may result in references to unintended elements of the Raster's associated DataBuffer. It is the user's responsibility to avoid accessing such pixels.
A SampleModel describes how samples of a Raster are stored in the primitive array elements of a DataBuffer. Samples may be stored one per data element, as in a PixelInterleavedSampleModel or BandedSampleModel, or packed several to an element, as in a SinglePixelPackedSampleModel or MultiPixelPackedSampleModel. The SampleModel is also controls whether samples are sign extended, allowing unsigned data to be stored in signed Java data types such as byte, short, and int.
Although a Raster may live anywhere in the plane, a SampleModel makes use of a simple coordinate system that starts at (0, 0). A Raster therefore contains a translation factor that allows pixel locations to be mapped between the Raster's coordinate system and that of the SampleModel. The translation from the SampleModel coordinate system to that of the Raster may be obtained by the getSampleModelTranslateX and getSampleModelTranslateY methods.
A Raster may share a DataBuffer with another Raster either by explicit construction or by the use of the createChild and createTranslatedChild methods. Rasters created by these methods can return a reference to the Raster they were created from by means of the getParent method. For a Raster that was not constructed by means of a call to createTranslatedChild or createChild, getParent will return null.
The createTranslatedChild method returns a new Raster that shares all of the data of the current Raster, but occupies a bounding rectangle of the same width and height but with a different starting point. For example, if the parent Raster occupied the region (10, 10) to (100, 100), and the translated Raster was defined to start at (50, 50), then pixel (20, 20) of the parent and pixel (60, 60) of the child occupy the same location in the DataBuffer shared by the two Rasters. In the first case, (-10, -10) should be added to a pixel coordinate to obtain the corresponding SampleModel coordinate, and in the second case (-50, -50) should be added.
The translation between a parent and child Raster may be determined by subtracting the child's sampleModelTranslateX and sampleModelTranslateY values from those of the parent.
The createChild method may be used to create a new Raster occupying only a subset of its parent's bounding rectangle (with the same or a translated coordinate system) or with a subset of the bands of its parent.
All constructors are protected. The correct way to create a Raster is to use one of the static create methods defined in this class. These methods create instances of Raster that use the standard Interleaved, Banded, and Packed SampleModels and that may be processed more efficiently than a Raster created by combining an externally generated SampleModel and DataBuffer. @see ae.java.awt.image.DataBuffer @see ae.java.awt.image.SampleModel @see ae.java.awt.image.PixelInterleavedSampleModel @see ae.java.awt.image.BandedSampleModel @see ae.java.awt.image.SinglePixelPackedSampleModel @see ae.java.awt.image.MultiPixelPackedSampleModel

                                        (int) xform.getTranslateY());
            return;
        }


        // General case: cobble the necessary region into a single Raster
        Raster raster = img.getData(region);


        // Make a new Raster with the same contents as raster
        // but starting at (0, 0).  This raster is thus in the same
        // coordinate system as the SampleModel of the original raster.
        WritableRaster wRaster =
              Raster.createWritableRaster(raster.getSampleModel(),
                                          raster.getDataBuffer(),
                                          null);


        // If the original raster was in a different coordinate
        // system than its SampleModel, we need to perform an
        // additional translation in order to get the (minX, minY)
        // pixel of raster to be pixel (0, 0) of wRaster.  We also
        // have to have the correct width and height.
        int minX = raster.getMinX();
        int minY = raster.getMinY();
        int width = raster.getWidth();
        int height = raster.getHeight();
        int px = minX - raster.getSampleModelTranslateX();
        int py = minY - raster.getSampleModelTranslateY();
        if (px != 0 || py != 0 || width != wRaster.getWidth() ||
            height != wRaster.getHeight()) {
            wRaster =
                wRaster.createWritableChild(px,
                                            py,

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        Rectangle tileRect = new Rectangle();


        for (int ty = minTileY; ty <= maxTileY; ty++) {
            for (int tx = minTileX; tx <= maxTileX; tx++) {
                // Get the current tile.
                Raster raster = img.getTile(tx, ty);


                // Fill in tileRect with the tile bounds
                tileRect.x = tx*tileWidth + tileGridXOffset;
                tileRect.y = ty*tileHeight + tileGridYOffset;
                tileRect.width = tileWidth;
                tileRect.height = tileHeight;


                // Clip the tile against the image bounds and
                // backwards mapped clip region
                // The result can't be empty
                clipTo(tileRect, region);


                // Create a WritableRaster containing the tile
                WritableRaster wRaster = null;
                if (raster instanceof WritableRaster) {
                    wRaster = (WritableRaster)raster;
                } else {
                    // Create a WritableRaster in the same coordinate system
                    // as the original raster.
                    wRaster =
                        Raster.createWritableRaster(raster.getSampleModel(),
                                                    raster.getDataBuffer(),
                                                    null);
                }


                // Translate wRaster to start at (0, 0) and to contain
                // only the relevent portion of the tile

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            rdrdImage = rdblImage.createDefaultRendering();
        }


        // And its ColorModel
        ColorModel colorModel = rdrdImage.getColorModel();
        Raster raster = rdrdImage.getData();
        SampleModel sampleModel = raster.getSampleModel();
        DataBuffer dataBuffer = raster.getDataBuffer();


        if (colorModel == null) {
            colorModel = ColorModel.getRGBdefault();
        }
        int minX = raster.getMinX();
        int minY = raster.getMinY();
        int width = raster.getWidth();
        int height = raster.getHeight();


        Enumeration icList;
        ImageConsumer ic;
        // Set up the ImageConsumers
        icList = ics.elements();

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        boolean isPalette = false;
        int paletteEntries = 0;
        IndexColorModel icm = null;


        RenderedImage input = null;
        Raster inputRaster = null;
        boolean writeRaster = image.hasRaster();
        Rectangle sourceRegion = param.getSourceRegion();
        SampleModel sampleModel = null;
        ColorModel colorModel = null;


        compImageSize = 0;


        if (writeRaster) {
            inputRaster = image.getRaster();
            sampleModel = inputRaster.getSampleModel();
            colorModel = ImageUtil.createColorModel(null, sampleModel);
            if (sourceRegion == null)
                sourceRegion = inputRaster.getBounds();
            else
                sourceRegion = sourceRegion.intersection(inputRaster.getBounds());
        } else {
            input = image.getRenderedImage();
            sampleModel = input.getSampleModel();
            colorModel = input.getColorModel();
            Rectangle rect = new Rectangle(input.getMinX(), input.getMinY(),
                                           input.getWidth(), input.getHeight());
            if (sourceRegion == null)
                sourceRegion = rect;
            else
                sourceRegion = sourceRegion.intersection(rect);
        }


        IIOMetadata imageMetadata = image.getMetadata();
        BMPMetadata bmpImageMetadata = null;
        if (imageMetadata != null
            && imageMetadata instanceof BMPMetadata)
        {
            bmpImageMetadata = (BMPMetadata)imageMetadata;
        } else {
            ImageTypeSpecifier imageType =
                new ImageTypeSpecifier(colorModel, sampleModel);


            bmpImageMetadata = (BMPMetadata)getDefaultImageMetadata(imageType,
                                                                    param);
        }


        if (sourceRegion.isEmpty())
            throw new RuntimeException(I18N.getString("BMPImageWrite0"));


        int scaleX = param.getSourceXSubsampling();
        int scaleY = param.getSourceYSubsampling();
        int xOffset = param.getSubsamplingXOffset();
        int yOffset = param.getSubsamplingYOffset();


        // cache the data type;
        int dataType = sampleModel.getDataType();


        sourceRegion.translate(xOffset, yOffset);
        sourceRegion.width -= xOffset;
        sourceRegion.height -= yOffset;


        int minX = sourceRegion.x / scaleX;
        int minY = sourceRegion.y / scaleY;
        w = (sourceRegion.width + scaleX - 1) / scaleX;
        h = (sourceRegion.height + scaleY - 1) / scaleY;
        xOffset = sourceRegion.x % scaleX;
        yOffset = sourceRegion.y % scaleY;


        Rectangle destinationRegion = new Rectangle(minX, minY, w, h);
        boolean noTransform = destinationRegion.equals(sourceRegion);


        // Raw data can only handle bytes, everything greater must be ASCII.
        int[] sourceBands = param.getSourceBands();
        boolean noSubband = true;
        int numBands = sampleModel.getNumBands();


        if (sourceBands != null) {
            sampleModel = sampleModel.createSubsetSampleModel(sourceBands);
            colorModel = null;
            noSubband = false;
            numBands = sampleModel.getNumBands();
        } else {
            sourceBands = new int[numBands];
            for (int i = 0; i < numBands; i++)
                sourceBands[i] = i;
        }


        int[] bandOffsets = null;
        boolean bgrOrder = true;


        if (sampleModel instanceof ComponentSampleModel) {
            bandOffsets = ((ComponentSampleModel)sampleModel).getBandOffsets();
            if (sampleModel instanceof BandedSampleModel) {
                // for images with BandedSampleModel we can not work
                //  with raster directly and must use writePixels()
                bgrOrder = false;
            } else {
                // we can work with raster directly only in case of
                // BGR component order.
                // In any other case we must use writePixels()
                for (int i = 0; i < bandOffsets.length; i++) {
                    bgrOrder &= (bandOffsets[i] == (bandOffsets.length - i - 1));
                }
            }
        } else {
            if (sampleModel instanceof SinglePixelPackedSampleModel) {


                // BugId 4892214: we can not work with raster directly
                // if image have different color order than RGB.
                // We should use writePixels() for such images.
                int[] bitOffsets = ((SinglePixelPackedSampleModel)sampleModel).getBitOffsets();
                for (int i=0; i<bitOffsets.length-1; i++) {
                    bgrOrder &= bitOffsets[i] > bitOffsets[i+1];
                }
            }
        }


        if (bandOffsets == null) {
            // we will use getPixels() to extract pixel data for writePixels()
            // Please note that getPixels() provides rgb bands order.
            bandOffsets = new int[numBands];
            for (int i = 0; i < numBands; i++)
                bandOffsets[i] = i;
        }


        noTransform &= bgrOrder;


        int sampleSize[] = sampleModel.getSampleSize();


        //XXX: check more


        // Number of bytes that a scanline for the image written out will have.
        int destScanlineBytes = w * numBands;


        switch(bmpParam.getCompressionMode()) {
        case ImageWriteParam.MODE_EXPLICIT:
            compressionType = getCompressionType(bmpParam.getCompressionType());
            break;
        case ImageWriteParam.MODE_COPY_FROM_METADATA:
            compressionType = bmpImageMetadata.compression;
            break;
        case ImageWriteParam.MODE_DEFAULT:
            compressionType = getPreferredCompressionType(colorModel, sampleModel);
            break;
        default:
            // ImageWriteParam.MODE_DISABLED:
            compressionType = BI_RGB;
        }


        if (!canEncodeImage(compressionType, colorModel, sampleModel)) {
            throw new IOException("Image can not be encoded with compression type "
                                  + compressionTypeNames[compressionType]);
        }


        byte r[] = null, g[] = null, b[] = null, a[] = null;


        if (compressionType == BMPConstants.BI_BITFIELDS) {
            bitsPerPixel =
                DataBuffer.getDataTypeSize(sampleModel.getDataType());


            if (bitsPerPixel != 16 && bitsPerPixel != 32) {
                // we should use 32bpp images in case of BI_BITFIELD
                // compression to avoid color conversion artefacts
                bitsPerPixel = 32;


                // Setting this flag to false ensures that generic
                // writePixels() will be used to store image data
                noTransform = false;
            }


            destScanlineBytes = w * bitsPerPixel + 7 >> 3;


            isPalette = true;
            paletteEntries = 3;
            r = new byte[paletteEntries];
            g = new byte[paletteEntries];
            b = new byte[paletteEntries];
            a = new byte[paletteEntries];


            int rmask = 0x00ff0000;
            int gmask = 0x0000ff00;
            int bmask = 0x000000ff;


            if (bitsPerPixel == 16) {
                /* NB: canEncodeImage() ensures we have image of
                 * either USHORT_565_RGB or USHORT_555_RGB type here.
                 * Technically, it should work for other direct color
                 * model types but it might be non compatible with win98
                 * and friends.
                 */
                if (colorModel instanceof DirectColorModel) {
                    DirectColorModel dcm = (DirectColorModel)colorModel;
                    rmask = dcm.getRedMask();
                    gmask = dcm.getGreenMask();
                    bmask = dcm.getBlueMask();
                } else {
                    // it is unlikely, but if it happens, we should throw
                    // an exception related to unsupported image format
                    throw new IOException("Image can not be encoded with " +
                                          "compression type " +
                                          compressionTypeNames[compressionType]);
                }
            }
            writeMaskToPalette(rmask, 0, r, g, b, a);
            writeMaskToPalette(gmask, 1, r, g, b, a);
            writeMaskToPalette(bmask, 2, r, g, b, a);


            if (!noTransform) {
                // prepare info for writePixels procedure
                bitMasks = new int[3];
                bitMasks[0] = rmask;
                bitMasks[1] = gmask;
                bitMasks[2] = bmask;


                bitPos = new int[3];
                bitPos[0] = firstLowBit(rmask);
                bitPos[1] = firstLowBit(gmask);
                bitPos[2] = firstLowBit(bmask);
            }


            if (colorModel instanceof IndexColorModel) {
                icm = (IndexColorModel)colorModel;
            }
        } else { // handle BI_RGB compression
            if (colorModel instanceof IndexColorModel) {
                isPalette = true;
                icm = (IndexColorModel)colorModel;
                paletteEntries = icm.getMapSize();


                if (paletteEntries <= 2) {
                    bitsPerPixel = 1;
                    destScanlineBytes = w + 7 >> 3;
                } else if (paletteEntries <= 16) {
                    bitsPerPixel = 4;
                    destScanlineBytes = w + 1 >> 1;
                } else if (paletteEntries <= 256) {
                    bitsPerPixel = 8;
                } else {
                    // Cannot be written as a Palette image. So write out as
                    // 24 bit image.
                    bitsPerPixel = 24;
                    isPalette = false;
                    paletteEntries = 0;
                    destScanlineBytes = w * 3;
                }


                if (isPalette == true) {
                    r = new byte[paletteEntries];
                    g = new byte[paletteEntries];
                    b = new byte[paletteEntries];
                    a = new byte[paletteEntries];


                    icm.getAlphas(a);
                    icm.getReds(r);
                    icm.getGreens(g);
                    icm.getBlues(b);
                }


            } else {
                // Grey scale images
                if (numBands == 1) {


                    isPalette = true;
                    paletteEntries = 256;
                    bitsPerPixel = sampleSize[0];


                    destScanlineBytes = (w * bitsPerPixel + 7 >> 3);


                    r = new byte[256];
                    g = new byte[256];
                    b = new byte[256];
                    a = new byte[256];


                    for (int i = 0; i < 256; i++) {
                        r[i] = (byte)i;
                        g[i] = (byte)i;
                        b[i] = (byte)i;
                        a[i] = (byte)255;
                    }


                } else {
                    if (sampleModel instanceof SinglePixelPackedSampleModel &&
                        noSubband)
                    {
                        /* NB: the actual pixel size can be smaller than
                         * size of used DataBuffer element.
                         * For example: in case of TYPE_INT_RGB actual pixel
                         * size is 24 bits, but size of DataBuffere element
                         * is 32 bits
                         */
                        int[] sample_sizes = sampleModel.getSampleSize();
                        bitsPerPixel = 0;
                        for (int size : sample_sizes) {
                            bitsPerPixel += size;
                        }
                        bitsPerPixel = roundBpp(bitsPerPixel);
                        if (bitsPerPixel != DataBuffer.getDataTypeSize(sampleModel.getDataType())) {
                            noTransform = false;
                        }
                        destScanlineBytes = w * bitsPerPixel + 7 >> 3;
                    }
                }
            }
        }


        // actual writing of image data
        int fileSize = 0;
        int offset = 0;
        int headerSize = 0;
        int imageSize = 0;
        int xPelsPerMeter = 0;
        int yPelsPerMeter = 0;
        int colorsUsed = 0;
        int colorsImportant = paletteEntries;


        // Calculate padding for each scanline
        int padding = destScanlineBytes % 4;
        if (padding != 0) {
            padding = 4 - padding;
        }




        // FileHeader is 14 bytes, BitmapHeader is 40 bytes,
        // add palette size and that is where the data will begin
        offset = 54 + paletteEntries * 4;


        imageSize = (destScanlineBytes + padding) * h;
        fileSize = imageSize + offset;
        headerSize = 40;


        long headPos = stream.getStreamPosition();


        writeFileHeader(fileSize, offset);


        writeInfoHeader(headerSize, bitsPerPixel);


        // compression
        stream.writeInt(compressionType);


        // imageSize
        stream.writeInt(imageSize);


        // xPelsPerMeter
        stream.writeInt(xPelsPerMeter);


        // yPelsPerMeter
        stream.writeInt(yPelsPerMeter);


        // Colors Used
        stream.writeInt(colorsUsed);


        // Colors Important
        stream.writeInt(colorsImportant);


        // palette
        if (isPalette == true) {


            // write palette
            if (compressionType == BMPConstants.BI_BITFIELDS) {
                // write masks for red, green and blue components.
                for (int i=0; i<3; i++) {
                    int mask = (a[i]&0xFF) + ((r[i]&0xFF)*0x100) + ((g[i]&0xFF)*0x10000) + ((b[i]&0xFF)*0x1000000);
                    stream.writeInt(mask);
                }
            } else {
                for (int i=0; i<paletteEntries; i++) {
                    stream.writeByte(b[i]);
                    stream.writeByte(g[i]);
                    stream.writeByte(r[i]);
                    stream.writeByte(a[i]);
                }
            }
        }


        // Writing of actual image data
        int scanlineBytes = w * numBands;


        // Buffer for up to 8 rows of pixels
        int[] pixels = new int[scanlineBytes * scaleX];


        // Also create a buffer to hold one line of the data
        // to be written to the file, so we can use array writes.
        bpixels = new byte[destScanlineBytes];


        int l;


        if (compressionType == BMPConstants.BI_JPEG ||
            compressionType == BMPConstants.BI_PNG) {


            // prepare embedded buffer
            embedded_stream = new ByteArrayOutputStream();
            writeEmbedded(image, bmpParam);
            // update the file/image Size
            embedded_stream.flush();
            imageSize = embedded_stream.size();


            long endPos = stream.getStreamPosition();
            fileSize = (int)(offset + imageSize);
            stream.seek(headPos);
            writeSize(fileSize, 2);
            stream.seek(headPos);
            writeSize(imageSize, 34);
            stream.seek(endPos);
            stream.write(embedded_stream.toByteArray());
            embedded_stream = null;


            if (abortRequested()) {
                processWriteAborted();
            } else {
                processImageComplete();
                stream.flushBefore(stream.getStreamPosition());
            }


            return;
        }


        isTopDown = bmpParam.isTopDown();


        int maxBandOffset = bandOffsets[0];
        for (int i = 1; i < bandOffsets.length; i++)
            if (bandOffsets[i] > maxBandOffset)
                maxBandOffset = bandOffsets[i];


        int[] pixel = new int[maxBandOffset + 1];


        int destScanlineLength = destScanlineBytes;


        if (noTransform && noSubband) {
            destScanlineLength = destScanlineBytes / (DataBuffer.getDataTypeSize(dataType)>>3);
        }
        for (int i = 0; i < h; i++) {
            if (abortRequested()) {
                break;
            }


            int row = minY + i;


            if (!isTopDown)
                row = minY + h - i -1;


            // Get the pixels
            Raster src = inputRaster;


            Rectangle srcRect =
                new Rectangle(minX * scaleX + xOffset,
                              row * scaleY + yOffset,
                              (w - 1)* scaleX + 1,
                              1);
            if (!writeRaster)
                src = input.getData(srcRect);


            if (noTransform && noSubband) {
                SampleModel sm = src.getSampleModel();
                int pos = 0;
                int startX = srcRect.x - src.getSampleModelTranslateX();
                int startY = srcRect.y - src.getSampleModelTranslateY();
                if (sm instanceof ComponentSampleModel) {
                    ComponentSampleModel csm = (ComponentSampleModel)sm;
                    pos = csm.getOffset(startX, startY, 0);
                    for(int nb=1; nb < csm.getNumBands(); nb++) {
                        if (pos > csm.getOffset(startX, startY, nb)) {
                            pos = csm.getOffset(startX, startY, nb);
                        }
                    }
                } else if (sm instanceof MultiPixelPackedSampleModel) {
                    MultiPixelPackedSampleModel mppsm =
                        (MultiPixelPackedSampleModel)sm;
                    pos = mppsm.getOffset(startX, startY);
                } else if (sm instanceof SinglePixelPackedSampleModel) {
                    SinglePixelPackedSampleModel sppsm =
                        (SinglePixelPackedSampleModel)sm;
                    pos = sppsm.getOffset(startX, startY);
                }


                if (compressionType == BMPConstants.BI_RGB || compressionType == BMPConstants.BI_BITFIELDS){
                    switch(dataType) {
                    case DataBuffer.TYPE_BYTE:
                        byte[] bdata =
                            ((DataBufferByte)src.getDataBuffer()).getData();
                        stream.write(bdata, pos, destScanlineLength);
                        break;


                    case DataBuffer.TYPE_SHORT:
                        short[] sdata =
                            ((DataBufferShort)src.getDataBuffer()).getData();
                        stream.writeShorts(sdata, pos, destScanlineLength);
                        break;


                    case DataBuffer.TYPE_USHORT:
                        short[] usdata =
                            ((DataBufferUShort)src.getDataBuffer()).getData();
                        stream.writeShorts(usdata, pos, destScanlineLength);
                        break;


                    case DataBuffer.TYPE_INT:
                        int[] idata =
                            ((DataBufferInt)src.getDataBuffer()).getData();
                        stream.writeInts(idata, pos, destScanlineLength);
                        break;
                    }


                    for(int k=0; k<padding; k++) {
                        stream.writeByte(0);
                    }
                } else if (compressionType == BMPConstants.BI_RLE4) {
                    if (bpixels == null || bpixels.length < scanlineBytes)
                        bpixels = new byte[scanlineBytes];
                    src.getPixels(srcRect.x, srcRect.y,
                                  srcRect.width, srcRect.height, pixels);
                    for (int h=0; h<scanlineBytes; h++) {
                        bpixels[h] = (byte)pixels[h];
                    }
                    encodeRLE4(bpixels, scanlineBytes);
                } else if (compressionType == BMPConstants.BI_RLE8) {
                    //byte[] bdata =
                    //    ((DataBufferByte)src.getDataBuffer()).getData();
                    //System.out.println("bdata.length="+bdata.length);
                    //System.arraycopy(bdata, pos, bpixels, 0, scanlineBytes);
                    if (bpixels == null || bpixels.length < scanlineBytes)
                        bpixels = new byte[scanlineBytes];
                    src.getPixels(srcRect.x, srcRect.y,
                                  srcRect.width, srcRect.height, pixels);
                    for (int h=0; h<scanlineBytes; h++) {
                        bpixels[h] = (byte)pixels[h];
                    }


                    encodeRLE8(bpixels, scanlineBytes);
                }
            } else {
                src.getPixels(srcRect.x, srcRect.y,
                              srcRect.width, srcRect.height, pixels);


                if (scaleX != 1 || maxBandOffset != numBands - 1) {
                    for (int j = 0, k = 0, n=0; j < w;
                         j++, k += scaleX * numBands, n += numBands)

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            ColorModel srcCM = srcData.getColorModel();
            ColorModel dstCM = dstData.getColorModel();
            // REMIND: Should get RenderingHints from sg2d
            CompositeContext ctx = comp.createContext(srcCM, dstCM,
                                                      new RenderingHints(null));
            Raster srcRas = srcData.getRaster(srcx, srcy, width, height);
            WritableRaster dstRas =
                (WritableRaster) dstData.getRaster(dstx, dsty, width, height);


            if (clip == null) {
                clip = Region.getInstanceXYWH(dstx, dsty, width, height);
            }
            int span[] = {dstx, dsty, dstx+width, dsty+height};
            SpanIterator si = clip.getSpanIterator(span);
            srcx -= dstx;
            srcy -= dsty;
            while (si.nextSpan(span)) {
                int w = span[2] - span[0];
                int h = span[3] - span[1];
                srcRas = srcRas.createChild(srcx + span[0], srcy + span[1],
                                            w, h, 0, 0, null);
                dstRas = dstRas.createWritableChild(span[0], span[1],
                                                    w, h, 0, 0, null);
                ctx.compose(srcRas, dstRas, dstRas);
            }

View Full Code Here

        if (DEBUG) System.out.println("Writing unoptimized");


        int[] sbuf = new int[sw];
        byte[] dbuf = new byte[dw];


        Raster raster =
            image.getNumXTiles() == 1 && image.getNumYTiles() == 1 ?
            image.getTile(0, 0) : image.getData();
        for (int y = dy; y < dh; y += ddy) {
            if (numRowsWritten % progressReportRowPeriod == 0) {
                if (abortRequested()) {
                    processWriteAborted();
                    return;
                }
                processImageProgress((numRowsWritten*100.0F)/dh);
            }


            raster.getSamples(sx, sy, sw, 1, 0, sbuf);
            for (int i = 0, j = 0; i < dw; i++, j += sdx) {
                dbuf[i] = (byte)sbuf[j];
            }
            compressor.compress(dbuf, 0, dw);
            numRowsWritten++;

View Full Code Here


        if (interlaceFlag) {
            if (DEBUG) System.out.println("Writing interlaced");


            if (isOptimizedCase) {
                Raster tile = image.getTile(0, 0);
                byte[] data = ((DataBufferByte)tile.getDataBuffer()).getData();
                ComponentSampleModel csm =
                    (ComponentSampleModel)tile.getSampleModel();
                int offset = csm.getOffset(sourceXOffset, sourceYOffset, 0);
                int lineStride = csm.getScanlineStride();


                writeRowsOpt(data, offset, lineStride, compressor,
                             0, 8, destWidth, destHeight,
                             numRowsWritten, progressReportRowPeriod);


                if (abortRequested()) {
                    return;
                }


                numRowsWritten += destHeight/8;


                writeRowsOpt(data, offset, lineStride, compressor,
                             4, 8, destWidth, destHeight,
                             numRowsWritten, progressReportRowPeriod);


                if (abortRequested()) {
                    return;
                }


                numRowsWritten += (destHeight - 4)/8;


                writeRowsOpt(data, offset, lineStride, compressor,
                             2, 4, destWidth, destHeight,
                             numRowsWritten, progressReportRowPeriod);


                if (abortRequested()) {
                    return;
                }


                numRowsWritten += (destHeight - 2)/4;


                writeRowsOpt(data, offset, lineStride, compressor,
                             1, 2, destWidth, destHeight,
                             numRowsWritten, progressReportRowPeriod);
            } else {
                writeRows(image, compressor,
                          sourceXOffset, periodX,
                          sourceYOffset, 8*periodY,
                          sourceWidth,
                          0, 8, destWidth, destHeight,
                          numRowsWritten, progressReportRowPeriod);


                if (abortRequested()) {
                    return;
                }


                numRowsWritten += destHeight/8;


                writeRows(image, compressor, sourceXOffset, periodX,
                          sourceYOffset + 4*periodY, 8*periodY,
                          sourceWidth,
                          4, 8, destWidth, destHeight,
                          numRowsWritten, progressReportRowPeriod);


                if (abortRequested()) {
                    return;
                }


                numRowsWritten += (destHeight - 4)/8;


                writeRows(image, compressor, sourceXOffset, periodX,
                          sourceYOffset + 2*periodY, 4*periodY,
                          sourceWidth,
                          2, 4, destWidth, destHeight,
                          numRowsWritten, progressReportRowPeriod);


                if (abortRequested()) {
                    return;
                }


                numRowsWritten += (destHeight - 2)/4;


                writeRows(image, compressor, sourceXOffset, periodX,
                          sourceYOffset + periodY, 2*periodY,
                          sourceWidth,
                          1, 2, destWidth, destHeight,
                          numRowsWritten, progressReportRowPeriod);
            }
        } else {
            if (DEBUG) System.out.println("Writing non-interlaced");


            if (isOptimizedCase) {
                Raster tile = image.getTile(0, 0);
                byte[] data = ((DataBufferByte)tile.getDataBuffer()).getData();
                ComponentSampleModel csm =
                    (ComponentSampleModel)tile.getSampleModel();
                int offset = csm.getOffset(sourceXOffset, sourceYOffset, 0);
                int lineStride = csm.getScanlineStride();


                writeRowsOpt(data, offset, lineStride, compressor,
                             0, 1, destWidth, destHeight,

View Full Code Here

        filteredRows = new byte[5][bytesPerRow + bpp];


        int bitDepth = metadata.IHDR_bitDepth;
        for (int row = minY + yOffset; row < minY + height; row += ySkip) {
            Rectangle rect = new Rectangle(minX, row, width, 1);
            Raster ras = image.getData(rect);
            if (sourceBands != null) {
                ras = ras.createChild(minX, row, width, 1, minX, row,
                                      sourceBands);
            }


            ras.getPixels(minX, row, width, 1, samples);


            if (image.getColorModel().isAlphaPremultiplied()) {
                WritableRaster wr = ras.createCompatibleWritableRaster();
                wr.setPixels(wr.getMinX(), wr.getMinY(),
                             wr.getWidth(), wr.getHeight(),
                             samples);


                image.getColorModel().coerceData(wr, false);

View Full Code Here

        processImageStarted(0);
        if (param == null)
            param = getDefaultWriteParam();


        RenderedImage input = null;
        Raster inputRaster = null;
        boolean writeRaster = image.hasRaster();
        Rectangle sourceRegion = param.getSourceRegion();
        SampleModel sampleModel = null;


        if (writeRaster) {
            inputRaster = image.getRaster();
            sampleModel = inputRaster.getSampleModel();
        } else {
            input = image.getRenderedImage();
            sampleModel = input.getSampleModel();


            inputRaster = input.getData();
        }


        checkSampleModel(sampleModel);
        if (sourceRegion == null)
            sourceRegion = inputRaster.getBounds();
        else
            sourceRegion = sourceRegion.intersection(inputRaster.getBounds());


        if (sourceRegion.isEmpty())
            throw new RuntimeException(I18N.getString("WBMPImageWriter1"));


        int scaleX = param.getSourceXSubsampling();
        int scaleY = param.getSourceYSubsampling();
        int xOffset = param.getSubsamplingXOffset();
        int yOffset = param.getSubsamplingYOffset();


        sourceRegion.translate(xOffset, yOffset);
        sourceRegion.width -= xOffset;
        sourceRegion.height -= yOffset;


        int minX = sourceRegion.x / scaleX;
        int minY = sourceRegion.y / scaleY;
        int w = (sourceRegion.width + scaleX - 1) / scaleX;
        int h = (sourceRegion.height + scaleY - 1) / scaleY;


        Rectangle destinationRegion = new Rectangle(minX, minY, w, h);
        sampleModel = sampleModel.createCompatibleSampleModel(w, h);


        SampleModel destSM= sampleModel;


        // If the data are not formatted nominally then reformat.
        if(sampleModel.getDataType() != DataBuffer.TYPE_BYTE ||
           !(sampleModel instanceof MultiPixelPackedSampleModel) ||
           ((MultiPixelPackedSampleModel)sampleModel).getDataBitOffset() != 0) {
           destSM =
                new MultiPixelPackedSampleModel(DataBuffer.TYPE_BYTE,
                                                w, h, 1,
                                                w + 7 >> 3, 0);
        }


        if (!destinationRegion.equals(sourceRegion)) {
            if (scaleX == 1 && scaleY == 1)
                inputRaster = inputRaster.createChild(inputRaster.getMinX(),
                                                      inputRaster.getMinY(),
                                                      w, h, minX, minY, null);
            else {
                WritableRaster ras = Raster.createWritableRaster(destSM,
                                                                 new Point(minX, minY));


                byte[] data = ((DataBufferByte)ras.getDataBuffer()).getData();


                for(int j = minY, y = sourceRegion.y, k = 0;
                    j < minY + h; j++, y += scaleY) {


                    for (int i = 0, x = sourceRegion.x;
                        i <w; i++, x +=scaleX) {
                        int v = inputRaster.getSample(x, y, 0);
                        data[k + (i >> 3)] |= v << (7 - (i & 7));
                    }
                    k += w + 7 >> 3;
                }
                inputRaster = ras;
            }
        }


        // If the data are not formatted nominally then reformat.
        if(!destSM.equals(inputRaster.getSampleModel())) {
            WritableRaster raster =
                Raster.createWritableRaster(destSM,
                                            new Point(inputRaster.getMinX(),
                                                      inputRaster.getMinY()));
            raster.setRect(inputRaster);
            inputRaster = raster;
        }


        // Check whether the image is white-is-zero.
        boolean isWhiteZero = false;
        if(!writeRaster && input.getColorModel() instanceof IndexColorModel) {
            IndexColorModel icm = (IndexColorModel)input.getColorModel();
            isWhiteZero = icm.getRed(0) > icm.getRed(1);
        }


        // Get the line stride, bytes per row, and data array.
        int lineStride =
            ((MultiPixelPackedSampleModel)destSM).getScanlineStride();
        int bytesPerRow = (w + 7)/8;
        byte[] bdata = ((DataBufferByte)inputRaster.getDataBuffer()).getData();


        // Write WBMP header.
        stream.write(0); // TypeField
        stream.write(0); // FixHeaderField
        stream.write(intToMultiByte(w)); // width

View Full Code Here

    }


    public Raster readRaster(int imageIndex, ImageReadParam param)
        throws IOException {
        setThreadLock();
        Raster retval = null;
        try {
            /*
             * This could be further optimized by not resetting the dest.
             * offset and creating a translated raster in readInternal()
             * (see bug 4994702 for more info).

View Full Code Here

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