List of usage examples for javax.imageio ImageWriter write
public void write(RenderedImage image) throws IOException
From source file:com.sketchy.utils.image.SketchyImage.java
public static void save(SketchyImage sketchyImage, File file) throws Exception { if (!file.getParentFile().canWrite()) { throw new Exception("Can not write to File: " + file.getPath() + "!"); }// w w w .j a v a 2s . c o m if (!StringUtils.endsWithIgnoreCase(file.getName(), ".png")) { throw new Exception("Can not save SketchyImage! Must be a .png file!"); } Iterator<ImageWriter> imageWriters = ImageIO.getImageWritersByFormatName("png"); ImageWriter imageWriter = null; if (imageWriters.hasNext()) { // Just get first one imageWriter = imageWriters.next(); } if (imageWriter == null) { // this should never happen!! if so.. we got problems throw new Exception("Can not find ImageReader for .png Files!"); } ImageOutputStream os = null; try { os = ImageIO.createImageOutputStream(file); imageWriter.setOutput(os); ImageWriteParam imageWriterParam = imageWriter.getDefaultWriteParam(); IIOMetadata metadata = imageWriter.getDefaultImageMetadata( ImageTypeSpecifier.createFromBufferedImageType(BufferedImage.TYPE_BYTE_BINARY), imageWriterParam); String metaDataFormatName = metadata.getNativeMetadataFormatName(); IIOMetadataNode metaDataNode = (IIOMetadataNode) metadata.getAsTree(metaDataFormatName); NodeList childNodes = metaDataNode.getElementsByTagName("pHYs"); IIOMetadataNode physNode = null; if (childNodes.getLength() == 0) { physNode = new IIOMetadataNode("pHYs"); physNode.setAttribute("pixelsPerUnitXAxis", Integer.toString((int) Math.ceil(sketchyImage.dotsPerMillimeterWidth * 1000))); physNode.setAttribute("pixelsPerUnitYAxis", Integer.toString((int) Math.ceil(sketchyImage.dotsPerMillimeterHeight * 1000))); physNode.setAttribute("unitSpecifier", "meter"); // always meter metaDataNode.appendChild(physNode); } else { for (int nodeIdx = 0; nodeIdx < childNodes.getLength(); nodeIdx++) { physNode = (IIOMetadataNode) childNodes.item(nodeIdx); physNode.setAttribute("pixelsPerUnitXAxis", Integer.toString((int) Math.ceil(sketchyImage.dotsPerMillimeterWidth * 1000))); physNode.setAttribute("pixelsPerUnitYAxis", Integer.toString((int) Math.ceil(sketchyImage.dotsPerMillimeterHeight * 1000))); physNode.setAttribute("unitSpecifier", "meter"); // always meter metaDataNode.appendChild(physNode); } } metadata.setFromTree(metaDataFormatName, metaDataNode); imageWriter.write(new IIOImage(sketchyImage.image, null, metadata)); os.flush(); } catch (Exception e) { throw new Exception("Error Saving SketchyImage File: " + file.getPath() + "! " + e.getMessage()); } finally { IOUtils.closeQuietly(os); } }
From source file:org.photovault.imginfo.CreateCopyImageCommand.java
/** Helper function to save a rendered image to file @param instanceFile The file into which the image will be saved @param img Image that willb e saved/* ww w .ja v a2 s. c o m*/ @param xmpData XPM metadata packet that should be saved with the image @throws PhotovaultException if saving does not succeed */ protected void saveImage(File instanceFile, RenderedImage img, byte[] xmpData) throws PhotovaultException { ImageOutputStream out = null; log.debug("Entry: saveImage, file = " + instanceFile.getAbsolutePath()); try { out = new FileImageOutputStream(instanceFile); } catch (IOException e) { log.error("Error writing image: " + e.getMessage()); throw new PhotovaultException(e.getMessage()); } if (img.getSampleModel().getSampleSize(0) == 16) { log.debug("16 bit image, converting to 8 bits"); double[] subtract = new double[1]; subtract[0] = 0; double[] divide = new double[1]; divide[0] = 1. / 256.; // Now we can rescale the pixels gray levels: ParameterBlock pbRescale = new ParameterBlock(); pbRescale.add(divide); pbRescale.add(subtract); pbRescale.addSource(img); PlanarImage outputImage = (PlanarImage) JAI.create("rescale", pbRescale, null); // Make sure it is a byte image - force conversion. ParameterBlock pbConvert = new ParameterBlock(); pbConvert.addSource(outputImage); pbConvert.add(DataBuffer.TYPE_BYTE); img = JAI.create("format", pbConvert); } IIOImage iioimg = new IIOImage(img, null, null); /* Not all encoders support metadata handling */ Iterator writers = ImageIO.getImageWritersByFormatName("jpeg"); ImageWriter imgwriter = null; while (writers.hasNext()) { imgwriter = (ImageWriter) writers.next(); if (imgwriter.getClass().getName().endsWith("JPEGImageEncoder")) { // Break on finding the core provider. break; } } if (imgwriter == null) { System.err.println("Cannot find core JPEG writer!"); } imgwriter.addIIOWriteWarningListener(new IIOWriteWarningListener() { public void warningOccurred(ImageWriter arg0, int arg1, String arg2) { log.warn("Warning from ImageWriter: " + arg2); } }); ImageWriteParam params = imgwriter.getDefaultWriteParam(); ImageTypeSpecifier its = ImageTypeSpecifier.createFromRenderedImage(img); IIOMetadata metadata = imgwriter.getDefaultImageMetadata(its, null); IIOMetadataNode metatop = (IIOMetadataNode) metadata.getAsTree("javax_imageio_jpeg_image_1.0"); NodeList markerSeqNodes = metatop.getElementsByTagName("markerSequence"); if (markerSeqNodes.getLength() > 0) { IIOMetadataNode xmpNode = new IIOMetadataNode("unknown"); xmpNode.setAttribute("MarkerTag", "225"); xmpNode.setUserObject(xmpData); markerSeqNodes.item(0).appendChild(xmpNode); } try { metadata.setFromTree("javax_imageio_jpeg_image_1.0", metatop); } catch (Exception e) { log.warn("error editing metadata: " + e.getMessage()); e.printStackTrace(); throw new PhotovaultException("error setting image metadata: \n" + e.getMessage()); } iioimg.setMetadata(metadata); try { imgwriter.setOutput(out); imgwriter.write(iioimg); } catch (IOException e) { log.warn("Exception while encoding" + e.getMessage()); throw new PhotovaultException( "Error writing instance " + instanceFile.getAbsolutePath() + ": " + e.getMessage()); } finally { try { out.close(); } catch (IOException e) { log.warn("Exception while closing file: " + e.getMessage()); imgwriter.dispose(); throw new PhotovaultException( "Error writing instance " + instanceFile.getAbsolutePath() + ": " + e.getMessage()); } imgwriter.dispose(); } log.debug("Exit: saveImage"); }
From source file:edu.harvard.iq.dvn.core.web.servlet.FileDownloadServlet.java
private boolean generateImageThumb(StudyFile file) { String fileLocation = file.getFileSystemLocation(); if (fileLocation == null || fileLocation.trim().equals("")) { return false; }/*from ww w. j av a 2 s. c om*/ String thumbFileLocation = fileLocation + ".thumb"; // see if the thumb is already generated and saved: if (new File(thumbFileLocation).exists()) { return true; } // let's attempt to generate the thumb: // the default size of the thumbnail is 64 pixels horizontally. // The number 64 was picked arbitrarily; if a different size is // desired, it can be configured via the dvn.image.thumbnail.size // JVM option. Long thumbSize = Long.valueOf(64); String thumbSizeOption = System.getProperty("dvn.image.thumbnail.size"); if (thumbSizeOption != null) { Long thumbSizeOptionValue = null; try { thumbSizeOptionValue = new Long(thumbSizeOption); } catch (NumberFormatException nfe) { // if the supplied option value is invalid/unparseable, we // ignore it and fall back to the default value. } if (thumbSizeOptionValue != null && thumbSizeOptionValue.longValue() > 0) { thumbSize = thumbSizeOptionValue; } } // it is also possible to configure the thumbnail size for a // specific dataverse: VDC vdc = file.getStudy().getOwner(); if (vdc != null) { thumbSizeOption = System.getProperty("dvn.image.thumbnail.size." + vdc.getAlias()); if (thumbSizeOption != null) { Long thumbSizeOptionValue = null; try { thumbSizeOptionValue = new Long(thumbSizeOption); } catch (NumberFormatException nfe) { // if the supplied option value is invalid/unparseable, we // ignore it and fall back to the default value. } if (thumbSizeOptionValue != null && thumbSizeOptionValue.longValue() > 0) { thumbSize = thumbSizeOptionValue; } } } // This is the default location of the "convert" executable from the // ImageMagick package. If it's installed in a different locaiton, // it can be configured via the dvn.image.convert.exec JVM option. String imageMagickConvertExec = "/usr/bin/convert"; String imageMagickConvertExecOption = System.getProperty("dvn.image.convrt.exec"); if (imageMagickConvertExecOption != null) { if (!imageMagickConvertExecOption.trim().equals("")) { imageMagickConvertExec = imageMagickConvertExecOption.trim(); } } if (new File(imageMagickConvertExec).exists()) { String sizeOption = " -size " + thumbSize + "x" + thumbSize + " "; String ImageMagickCommandLine = imageMagickConvertExec + sizeOption + fileLocation + " -resize " + thumbSize + " -flatten png:" + thumbFileLocation; int exitValue = 1; try { Runtime runtime = Runtime.getRuntime(); Process process = runtime.exec(ImageMagickCommandLine); exitValue = process.waitFor(); } catch (Exception e) { exitValue = 1; } if (exitValue == 0) { return true; } } // For whatever reason, creating the thumbnail with ImageMagick // has failed. // Let's try again, this time with Java's standard Image // library: try { BufferedImage fullSizeImage = ImageIO.read(new File(fileLocation)); if (fullSizeImage == null) { return false; } double scaleFactor = (thumbSize.doubleValue()) / (double) fullSizeImage.getWidth(null); int thumbHeight = (int) (fullSizeImage.getHeight(null) * scaleFactor); // We are willing to spend a few extra CPU cycles to generate // better-looking thumbnails, hence the SCALE_SMOOTH flag. // SCALE_FAST would trade quality for speed. java.awt.Image thumbImage = fullSizeImage.getScaledInstance(thumbSize.intValue(), thumbHeight, java.awt.Image.SCALE_SMOOTH); ImageWriter writer = null; Iterator iter = ImageIO.getImageWritersByFormatName("png"); if (iter.hasNext()) { writer = (ImageWriter) iter.next(); } else { return false; } BufferedImage lowRes = new BufferedImage(thumbSize.intValue(), thumbHeight, BufferedImage.TYPE_INT_RGB); lowRes.getGraphics().drawImage(thumbImage, 0, 0, null); ImageOutputStream ios = ImageIO.createImageOutputStream(new File(thumbFileLocation)); writer.setOutput(ios); // finally, save thumbnail image: writer.write(lowRes); writer.dispose(); ios.close(); thumbImage.flush(); fullSizeImage.flush(); lowRes.flush(); return true; } catch (Exception e) { // something went wrong, returning "false": dbgLog.info("ImageIO: caught an exception while trying to generate a thumbnail for " + fileLocation); return false; } }