| /* |
| * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 6788458 |
| * @summary Test verifies that PNGImageReader takes tRNS chunk values |
| * into consideration while reading non-indexed RGB PNG images. |
| * @run main ReadPngRGBImageWithTRNSChunk |
| */ |
| |
| import java.awt.Graphics2D; |
| import java.awt.image.BufferedImage; |
| import java.awt.Color; |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Iterator; |
| import javax.imageio.ImageTypeSpecifier; |
| import javax.imageio.ImageWriter; |
| import javax.imageio.ImageIO; |
| import javax.imageio.ImageWriteParam; |
| import javax.imageio.metadata.IIOInvalidTreeException; |
| import javax.imageio.metadata.IIOMetadata; |
| import javax.imageio.metadata.IIOMetadataNode; |
| import javax.imageio.stream.ImageOutputStream; |
| import javax.imageio.IIOImage; |
| import java.awt.image.DataBuffer; |
| import java.awt.image.DataBufferUShort; |
| import java.awt.image.WritableRaster; |
| import java.awt.image.Raster; |
| import java.awt.color.ColorSpace; |
| import java.awt.image.ColorModel; |
| import java.awt.image.ComponentColorModel; |
| import java.awt.Transparency; |
| |
| public class ReadPngRGBImageWithTRNSChunk { |
| |
| private static BufferedImage img; |
| private static IIOMetadata metadata; |
| private static ImageWriteParam param; |
| private static ImageWriter writer; |
| private static byte[] imageByteArray; |
| |
| private static void createTRNSNode(String tRNS_value) |
| throws IIOInvalidTreeException { |
| IIOMetadataNode tRNS_rgb = new IIOMetadataNode("tRNS_RGB"); |
| tRNS_rgb.setAttribute("red", tRNS_value); |
| tRNS_rgb.setAttribute("green", tRNS_value); |
| tRNS_rgb.setAttribute("blue", tRNS_value); |
| |
| IIOMetadataNode tRNS = new IIOMetadataNode("tRNS"); |
| tRNS.appendChild(tRNS_rgb); |
| IIOMetadataNode root = new IIOMetadataNode("javax_imageio_png_1.0"); |
| root.appendChild(tRNS); |
| metadata.mergeTree("javax_imageio_png_1.0", root); |
| } |
| |
| private static void writeImage() throws IOException { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| ImageOutputStream ios = ImageIO.createImageOutputStream(baos); |
| writer.setOutput(ios); |
| writer.write(metadata, new IIOImage(img, null, metadata), param); |
| writer.dispose(); |
| |
| baos.flush(); |
| imageByteArray = baos.toByteArray(); |
| baos.close(); |
| } |
| |
| private static boolean verifyAlphaValue(BufferedImage img) { |
| Color firstPixel = new Color(img.getRGB(0, 0), true); |
| Color secondPixel = new Color(img.getRGB(1, 0), true); |
| |
| return firstPixel.getAlpha() != 0 || |
| secondPixel.getAlpha() != 255; |
| } |
| |
| private static boolean read8BitRGBPNGWithTRNSChunk() throws IOException { |
| int width = 2; |
| int height = 1; |
| // Create 8 bit PNG image |
| img = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR); |
| Graphics2D g2D = img.createGraphics(); |
| |
| // transparent first pixel |
| g2D.setColor(Color.WHITE); |
| g2D.fillRect(0, 0, 1, 1); |
| // non-transparent second pixel |
| g2D.setColor(Color.RED); |
| g2D.fillRect(1, 0, 1, 1); |
| g2D.dispose(); |
| |
| Iterator<ImageWriter> iterWriter = |
| ImageIO.getImageWritersBySuffix("png"); |
| writer = iterWriter.next(); |
| |
| param = writer.getDefaultWriteParam(); |
| ImageTypeSpecifier specifier = |
| ImageTypeSpecifier. |
| createFromBufferedImageType(BufferedImage.TYPE_3BYTE_BGR); |
| metadata = writer.getDefaultImageMetadata(specifier, param); |
| |
| // Create tRNS node and merge it with default metadata |
| createTRNSNode("255"); |
| |
| writeImage(); |
| |
| InputStream input= new ByteArrayInputStream(imageByteArray); |
| // Read 8 bit PNG RGB image with tRNS chunk |
| BufferedImage verify_img = ImageIO.read(input); |
| input.close(); |
| // Verify alpha values present in first & second pixel |
| return verifyAlphaValue(verify_img); |
| } |
| |
| private static boolean read16BitRGBPNGWithTRNSChunk() throws IOException { |
| // Create 16 bit PNG image |
| int height = 1; |
| int width = 2; |
| int numBands = 3; |
| int shortArrayLength = width * height * numBands; |
| short[] pixelData = new short[shortArrayLength]; |
| // transparent first pixel |
| pixelData[0] = (short)0xffff; |
| pixelData[1] = (short)0xffff; |
| pixelData[2] = (short)0xffff; |
| // non-transparent second pixel |
| pixelData[3] = (short)0xffff; |
| pixelData[4] = (short)0xffff; |
| pixelData[5] = (short)0xfffe; |
| |
| DataBuffer buffer = new DataBufferUShort(pixelData, shortArrayLength); |
| |
| int[] bandOffset = {0, 1 ,2}; |
| WritableRaster ras = |
| Raster.createInterleavedRaster(buffer, width, height, |
| width * numBands, numBands, bandOffset, null); |
| |
| int nBits[] = {16, 16 ,16}; |
| ColorModel colorModel = new |
| ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_sRGB), |
| nBits, false, false, Transparency.OPAQUE, |
| DataBuffer.TYPE_USHORT); |
| img = new BufferedImage(colorModel, ras, false, null); |
| |
| Iterator<ImageWriter> iterWriter = |
| ImageIO.getImageWritersBySuffix("png"); |
| writer = iterWriter.next(); |
| |
| param = writer.getDefaultWriteParam(); |
| ImageTypeSpecifier specifier = new ImageTypeSpecifier(img); |
| metadata = writer.getDefaultImageMetadata(specifier, param); |
| |
| // Create tRNS node and merge it with default metadata |
| createTRNSNode("65535"); |
| |
| writeImage(); |
| |
| InputStream input= new ByteArrayInputStream(imageByteArray); |
| // Read 16 bit PNG RGB image with tRNS chunk |
| BufferedImage verify_img = ImageIO.read(input); |
| input.close(); |
| // Verify alpha values present in first & second pixel |
| return verifyAlphaValue(verify_img); |
| } |
| |
| public static void main(String[] args) throws IOException { |
| boolean read8BitFail, read16BitFail; |
| // read 8 bit PNG RGB image with tRNS chunk |
| read8BitFail = read8BitRGBPNGWithTRNSChunk(); |
| |
| // read 16 bit PNG RGB image with tRNS chunk |
| read16BitFail = read16BitRGBPNGWithTRNSChunk(); |
| |
| if (read8BitFail || read16BitFail) { |
| throw new RuntimeException("PNGImageReader is not using" + |
| " transparent pixel information from tRNS chunk properly"); |
| } |
| } |
| } |
| |