Examples with IndexColorModel java.awt.image.IndexColorModel used on opensource projects

Example 21 with IndexColorModel

use of java.awt.image.IndexColorModel in project jdk8u_jdk by JetBrains.

the class GIFImageReader method createIndexed.

// We don't check all parameters as ImageTypeSpecifier.createIndexed do
// since this method is private and we pass consistent data here
private ImageTypeSpecifier createIndexed(byte[] r, byte[] g, byte[] b, int bits) {
    ColorModel colorModel;
    if (imageMetadata.transparentColorFlag) {
        // Some files erroneously have a transparent color index
        // of 255 even though there are fewer than 256 colors.
        int idx = Math.min(imageMetadata.transparentColorIndex, r.length - 1);
        colorModel = new IndexColorModel(bits, r.length, r, g, b, idx);
    } else {
        colorModel = new IndexColorModel(bits, r.length, r, g, b);
    }
    SampleModel sampleModel;
    if (bits == 8) {
        int[] bandOffsets = { 0 };
        sampleModel = new PixelInterleavedSampleModel(DataBuffer.TYPE_BYTE, 1, 1, 1, 1, bandOffsets);
    } else {
        sampleModel = new MultiPixelPackedSampleModel(DataBuffer.TYPE_BYTE, 1, 1, bits);
    }
    return new ImageTypeSpecifier(colorModel, sampleModel);
}

Example 22 with IndexColorModel

use of java.awt.image.IndexColorModel in project jdk8u_jdk by JetBrains.

the class PaletteBuilder method getIndexColorModel.

protected IndexColorModel getIndexColorModel() {
    int size = currSize;
    if (transColor != null) {
        // we need place for transparent color;
        size++;
    }
    byte[] red = new byte[size];
    byte[] green = new byte[size];
    byte[] blue = new byte[size];
    int index = 0;
    palette = new ColorNode[size];
    if (transColor != null) {
        index++;
    }
    if (root != null) {
        findPaletteEntry(root, index, red, green, blue);
    }
    IndexColorModel icm = null;
    if (transColor != null) {
        icm = new IndexColorModel(8, size, red, green, blue, 0);
    } else {
        icm = new IndexColorModel(8, currSize, red, green, blue);
    }
    return icm;
}

Example 23 with IndexColorModel

use of java.awt.image.IndexColorModel in project jdk8u_jdk by JetBrains.

the class PNGImageWriterSpi method canEncodeImage.

public boolean canEncodeImage(ImageTypeSpecifier type) {
    SampleModel sampleModel = type.getSampleModel();
    ColorModel colorModel = type.getColorModel();
    // Find the maximum bit depth across all channels
    int[] sampleSize = sampleModel.getSampleSize();
    int bitDepth = sampleSize[0];
    for (int i = 1; i < sampleSize.length; i++) {
        if (sampleSize[i] > bitDepth) {
            bitDepth = sampleSize[i];
        }
    }
    // Ensure bitDepth is between 1 and 16
    if (bitDepth < 1 || bitDepth > 16) {
        return false;
    }
    // Check number of bands, alpha
    int numBands = sampleModel.getNumBands();
    if (numBands < 1 || numBands > 4) {
        return false;
    }
    boolean hasAlpha = colorModel.hasAlpha();
    // the check below to fail and return false.
    if (colorModel instanceof IndexColorModel) {
        return true;
    }
    if ((numBands == 1 || numBands == 3) && hasAlpha) {
        return false;
    }
    if ((numBands == 2 || numBands == 4) && !hasAlpha) {
        return false;
    }
    return true;
}

Example 24 with IndexColorModel

use of java.awt.image.IndexColorModel in project jdk8u_jdk by JetBrains.

the class PNGMetadata method initialize.

/**
     * Sets the IHDR_bitDepth and IHDR_colorType variables.
     * The <code>numBands</code> parameter is necessary since
     * we may only be writing a subset of the image bands.
     */
public void initialize(ImageTypeSpecifier imageType, int numBands) {
    ColorModel colorModel = imageType.getColorModel();
    SampleModel sampleModel = imageType.getSampleModel();
    // Initialize IHDR_bitDepth
    int[] sampleSize = sampleModel.getSampleSize();
    int bitDepth = sampleSize[0];
    // Fixes bug 4413109
    for (int i = 1; i < sampleSize.length; i++) {
        if (sampleSize[i] > bitDepth) {
            bitDepth = sampleSize[i];
        }
    }
    // Multi-channel images must have a bit depth of 8 or 16
    if (sampleSize.length > 1 && bitDepth < 8) {
        bitDepth = 8;
    }
    // Round bit depth up to a power of 2
    if (bitDepth > 2 && bitDepth < 4) {
        bitDepth = 4;
    } else if (bitDepth > 4 && bitDepth < 8) {
        bitDepth = 8;
    } else if (bitDepth > 8 && bitDepth < 16) {
        bitDepth = 16;
    } else if (bitDepth > 16) {
        throw new RuntimeException("bitDepth > 16!");
    }
    IHDR_bitDepth = bitDepth;
    // Initialize IHDR_colorType
    if (colorModel instanceof IndexColorModel) {
        IndexColorModel icm = (IndexColorModel) colorModel;
        int size = icm.getMapSize();
        byte[] reds = new byte[size];
        icm.getReds(reds);
        byte[] greens = new byte[size];
        icm.getGreens(greens);
        byte[] blues = new byte[size];
        icm.getBlues(blues);
        // Determine whether the color tables are actually a gray ramp
        // if the color type has not been set previously
        boolean isGray = false;
        if (!IHDR_present || (IHDR_colorType != PNGImageReader.PNG_COLOR_PALETTE)) {
            isGray = true;
            int scale = 255 / ((1 << IHDR_bitDepth) - 1);
            for (int i = 0; i < size; i++) {
                byte red = reds[i];
                if ((red != (byte) (i * scale)) || (red != greens[i]) || (red != blues[i])) {
                    isGray = false;
                    break;
                }
            }
        }
        // Determine whether transparency exists
        boolean hasAlpha = colorModel.hasAlpha();
        byte[] alpha = null;
        if (hasAlpha) {
            alpha = new byte[size];
            icm.getAlphas(alpha);
        }
        if (isGray && hasAlpha && (bitDepth == 8 || bitDepth == 16)) {
            IHDR_colorType = PNGImageReader.PNG_COLOR_GRAY_ALPHA;
        } else if (isGray && !hasAlpha) {
            IHDR_colorType = PNGImageReader.PNG_COLOR_GRAY;
        } else {
            IHDR_colorType = PNGImageReader.PNG_COLOR_PALETTE;
            PLTE_present = true;
            PLTE_order = null;
            PLTE_red = (byte[]) reds.clone();
            PLTE_green = (byte[]) greens.clone();
            PLTE_blue = (byte[]) blues.clone();
            if (hasAlpha) {
                tRNS_present = true;
                tRNS_colorType = PNGImageReader.PNG_COLOR_PALETTE;
                PLTE_order = new int[alpha.length];
                // Reorder the palette so that non-opaque entries
                // come first.  Since the tRNS chunk does not have
                // to store trailing 255's, this can save a
                // considerable amount of space when encoding
                // images with only one transparent pixel value,
                // e.g., images from GIF sources.
                byte[] newAlpha = new byte[alpha.length];
                // Scan for non-opaque entries and assign them
                // positions starting at 0.
                int newIndex = 0;
                for (int i = 0; i < alpha.length; i++) {
                    if (alpha[i] != (byte) 255) {
                        PLTE_order[i] = newIndex;
                        newAlpha[newIndex] = alpha[i];
                        ++newIndex;
                    }
                }
                int numTransparent = newIndex;
                // positions following the non-opaque entries.
                for (int i = 0; i < alpha.length; i++) {
                    if (alpha[i] == (byte) 255) {
                        PLTE_order[i] = newIndex++;
                    }
                }
                // Reorder the palettes
                byte[] oldRed = PLTE_red;
                byte[] oldGreen = PLTE_green;
                byte[] oldBlue = PLTE_blue;
                // All have the same length
                int len = oldRed.length;
                PLTE_red = new byte[len];
                PLTE_green = new byte[len];
                PLTE_blue = new byte[len];
                for (int i = 0; i < len; i++) {
                    PLTE_red[PLTE_order[i]] = oldRed[i];
                    PLTE_green[PLTE_order[i]] = oldGreen[i];
                    PLTE_blue[PLTE_order[i]] = oldBlue[i];
                }
                // Copy only the transparent entries into tRNS_alpha
                tRNS_alpha = new byte[numTransparent];
                System.arraycopy(newAlpha, 0, tRNS_alpha, 0, numTransparent);
            }
        }
    } else {
        if (numBands == 1) {
            IHDR_colorType = PNGImageReader.PNG_COLOR_GRAY;
        } else if (numBands == 2) {
            IHDR_colorType = PNGImageReader.PNG_COLOR_GRAY_ALPHA;
        } else if (numBands == 3) {
            IHDR_colorType = PNGImageReader.PNG_COLOR_RGB;
        } else if (numBands == 4) {
            IHDR_colorType = PNGImageReader.PNG_COLOR_RGB_ALPHA;
        } else {
            throw new RuntimeException("Number of bands not 1-4!");
        }
    }
    IHDR_present = true;
}

Example 25 with IndexColorModel

use of java.awt.image.IndexColorModel in project jdk8u_jdk by JetBrains.

the class TransparencyTest method main.

public static void main(String[] args) {
    System.out.println("Test indexed image...");
    IndexColorModel icm = createIndexedBitmaskColorModel();
    BufferedImage img = createIndexedImage(200, 200, icm);
    TransparencyTest t = new TransparencyTest(img);
    try {
        t.doTest();
    } catch (Exception e) {
        throw new RuntimeException("Test failed!", e);
    }
    System.out.println("Test passed.");
}