super(vendorName, version, names, suffixes, MIMETypes, writerClassName, STANDARD_OUTPUT_TYPE, readerSpiNames, false, null, null, null, null, true, PNGMetadata.nativeMetadataFormatName, "com.sun.imageio.plugins.png.PNGMetadataFormat", null, null );
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(); // Fix 4464413: PNGTransparency reg-test was failing // because for IndexColorModels that have alpha, // numBands == 1 && hasAlpha == true, thus causing // 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;
return new PNGImageWriter(this);
return "Standard PNG image writer";