Example usage for java.awt.image ComponentSampleModel getOffset

Introduction

In this page you can find the example usage for java.awt.image ComponentSampleModel getOffset.

Prototype

public int getOffset(int x, int y) 

Source Link

Document

Gets the offset for the first band of pixel (x,y).

Usage

From source file:GraphicsUtil.java

protected static void mult_BYTE_COMP_Data(WritableRaster wr) {
    // System.out.println("Multiply Int: " + wr);

    ComponentSampleModel csm;
    csm = (ComponentSampleModel) wr.getSampleModel();

    final int width = wr.getWidth();

    final int scanStride = csm.getScanlineStride();
    final int pixStride = csm.getPixelStride();
    final int[] bandOff = csm.getBandOffsets();

    DataBufferByte db = (DataBufferByte) wr.getDataBuffer();
    final int base = (db.getOffset() + csm.getOffset(wr.getMinX() - wr.getSampleModelTranslateX(),
            wr.getMinY() - wr.getSampleModelTranslateY()));

    int a = 0;//from   w  w w  .  j a v a2s.com
    int aOff = bandOff[bandOff.length - 1];
    int bands = bandOff.length - 1;
    int b, i;

    // Access the pixel data array
    final byte pixels[] = db.getBankData()[0];
    for (int y = 0; y < wr.getHeight(); y++) {
        int sp = base + y * scanStride;
        final int end = sp + width * pixStride;
        while (sp < end) {
            a = pixels[sp + aOff] & 0xFF;
            if (a != 0xFF)
                for (b = 0; b < bands; b++) {
                    i = sp + bandOff[b];
                    pixels[i] = (byte) (((pixels[i] & 0xFF) * a) >> 8);
                }
            sp += pixStride;
        }
    }
}

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From source file:GraphicsUtil.java

protected static void divide_BYTE_COMP_Data(WritableRaster wr) {
    // System.out.println("Multiply Int: " + wr);

    ComponentSampleModel csm;
    csm = (ComponentSampleModel) wr.getSampleModel();

    final int width = wr.getWidth();

    final int scanStride = csm.getScanlineStride();
    final int pixStride = csm.getPixelStride();
    final int[] bandOff = csm.getBandOffsets();

    DataBufferByte db = (DataBufferByte) wr.getDataBuffer();
    final int base = (db.getOffset() + csm.getOffset(wr.getMinX() - wr.getSampleModelTranslateX(),
            wr.getMinY() - wr.getSampleModelTranslateY()));

    int a = 0;/*from  ww w  .  j  a  va  2 s.  co m*/
    int aOff = bandOff[bandOff.length - 1];
    int bands = bandOff.length - 1;
    int b, i;
    // Access the pixel data array
    final byte pixels[] = db.getBankData()[0];
    for (int y = 0; y < wr.getHeight(); y++) {
        int sp = base + y * scanStride;
        final int end = sp + width * pixStride;
        while (sp < end) {
            a = pixels[sp + aOff] & 0xFF;
            if (a == 0) {
                for (b = 0; b < bands; b++)
                    pixels[sp + bandOff[b]] = (byte) 0xFF;
            } else if (a < 255) {
                int aFP = (0x00FF0000 / a);
                for (b = 0; b < bands; b++) {
                    i = sp + bandOff[b];
                    pixels[i] = (byte) (((pixels[i] & 0xFF) * aFP) >>> 16);
                }
            }
            sp += pixStride;
        }
    }
}

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From source file:GraphicsUtil.java

protected static void mult_BYTE_COMP_Data(WritableRaster wr) {
    // System.out.println("Multiply Int: " + wr);

    ComponentSampleModel csm;
    csm = (ComponentSampleModel) wr.getSampleModel();

    final int width = wr.getWidth();

    final int scanStride = csm.getScanlineStride();
    final int pixStride = csm.getPixelStride();
    final int[] bandOff = csm.getBandOffsets();

    DataBufferByte db = (DataBufferByte) wr.getDataBuffer();
    final int base = (db.getOffset() + csm.getOffset(wr.getMinX() - wr.getSampleModelTranslateX(),
            wr.getMinY() - wr.getSampleModelTranslateY()));

    int aOff = bandOff[bandOff.length - 1];
    int bands = bandOff.length - 1;

    // Access the pixel data array
    final byte[] pixels = db.getBankData()[0];
    for (int y = 0; y < wr.getHeight(); y++) {
        int sp = base + y * scanStride;
        final int end = sp + width * pixStride;
        while (sp < end) {
            int a = pixels[sp + aOff] & 0xFF;
            if (a != 0xFF)
                for (int b = 0; b < bands; b++) {
                    int i = sp + bandOff[b];
                    pixels[i] = (byte) (((pixels[i] & 0xFF) * a) >> 8);
                }//from  w ww  .  j av  a  2  s .c o  m
            sp += pixStride;
        }
    }
}

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From source file:GraphicsUtil.java

protected static void divide_BYTE_COMP_Data(WritableRaster wr) {
    // System.out.println("Multiply Int: " + wr);

    ComponentSampleModel csm;
    csm = (ComponentSampleModel) wr.getSampleModel();

    final int width = wr.getWidth();

    final int scanStride = csm.getScanlineStride();
    final int pixStride = csm.getPixelStride();
    final int[] bandOff = csm.getBandOffsets();

    DataBufferByte db = (DataBufferByte) wr.getDataBuffer();
    final int base = (db.getOffset() + csm.getOffset(wr.getMinX() - wr.getSampleModelTranslateX(),
            wr.getMinY() - wr.getSampleModelTranslateY()));

    int aOff = bandOff[bandOff.length - 1];
    int bands = bandOff.length - 1;

    // Access the pixel data array
    final byte[] pixels = db.getBankData()[0];
    for (int y = 0; y < wr.getHeight(); y++) {
        int sp = base + y * scanStride;
        final int end = sp + width * pixStride;
        while (sp < end) {
            int a = pixels[sp + aOff] & 0xFF;
            if (a == 0) {
                for (int b = 0; b < bands; b++)
                    pixels[sp + bandOff[b]] = (byte) 0xFF;
            } else if (a < 255) { // this does NOT include a == 255 (0xff) !
                int aFP = (0x00FF0000 / a);
                for (int b = 0; b < bands; b++) {
                    int i = sp + bandOff[b];
                    pixels[i] = (byte) (((pixels[i] & 0xFF) * aFP) >>> 16);
                }/*from  ww w. j  a  v a 2s . c  o m*/
            }
            sp += pixStride;
        }
    }
}

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