Java源码示例：com.mortennobel.imagescaling.ResampleOp
示例1
@Override
public void execute(FsService fsService, HttpServletRequest request,
HttpServletResponse response, ServletContext servletContext)
throws Exception
{
String target = request.getParameter("target");
FsItemEx fsi = super.findItem(fsService, target);
InputStream is = fsi.openInputStream();
BufferedImage image = ImageIO.read(is);
int width = fsService.getServiceConfig().getTmbWidth();
ResampleOp rop = new ResampleOp(DimensionConstrain.createMaxDimension(
width, -1));
rop.setNumberOfThreads(4);
BufferedImage b = rop.filter(image, null);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(b, "png", baos);
byte[] bytesOut = baos.toByteArray();
is.close();
response.setHeader("Last-Modified",
DateUtils.addDays(Calendar.getInstance().getTime(), 2 * 360)
.toGMTString());
response.setHeader("Expires",
DateUtils.addDays(Calendar.getInstance().getTime(), 2 * 360)
.toGMTString());
ImageIO.write(b, "png", response.getOutputStream());
}
示例2
public static BufferedImage scaleImage(BufferedImage imageToScale) {
ResampleOp resizeOp = new ResampleOp(WIDTH, HEIGHT);
resizeOp.setFilter(ResampleFilters.getLanczos3Filter());
return resizeOp.filter(imageToScale, null);
}
示例3
@Override
public BufferedImage scale(BufferedImage imageToScale, int dWidth, int dHeight) {
ResampleOp resizeOp = new ResampleOp(dWidth, dHeight);
resizeOp.setFilter(filter);
return resizeOp.filter(imageToScale, null);
}
示例4
/**
* Returns thumbnail {@link BufferedImage} of the specified {@link BufferedImage}.
* Note that this method can only scale specified {@link BufferedImage} down, it will not scale it up.
* Also note that resulting {@link BufferedImage} will not have width and height larger than specified maximum, but might be less.
*
* @param bufferedImage {@link BufferedImage} to create thumbnail for
* @param maxSize maximum thumbnail {@link BufferedImage} width and height
* @return thumbnail {@link BufferedImage} of the specified {@link BufferedImage}
*/
@NotNull
public static BufferedImage createImageThumbnail ( @NotNull final BufferedImage bufferedImage, final int maxSize )
{
final BufferedImage preview;
if ( bufferedImage.getWidth () <= maxSize && bufferedImage.getHeight () <= maxSize )
{
// Simply return source image, but make sure it has compatible type
preview = toCompatibleImage ( bufferedImage );
}
else
{
// Calculate resulting width and height
final int width;
final int height;
if ( bufferedImage.getWidth () > bufferedImage.getHeight () )
{
width = maxSize;
height = Math.round ( ( float ) maxSize * bufferedImage.getHeight () / bufferedImage.getWidth () );
}
else if ( bufferedImage.getWidth () < bufferedImage.getHeight () )
{
height = maxSize;
width = Math.round ( ( float ) maxSize * bufferedImage.getWidth () / bufferedImage.getHeight () );
}
else
{
width = height = maxSize;
}
// Creating scaled down image
if ( width >= 3 && height >= 3 )
{
// Using Java Image Scaling library approach
final ResampleOp scaleOp = new ResampleOp ( width, height );
preview = scaleOp.filter ( bufferedImage, createCompatibleImage ( bufferedImage ) );
}
else
{
// Scaling down a very small image
preview = createCompatibleImage ( Math.max ( 1, width ), Math.max ( 1, height ), Transparency.TRANSLUCENT );
final Graphics2D g2d = preview.createGraphics ();
GraphicsUtils.setupImageQuality ( g2d );
g2d.drawImage ( bufferedImage, 0, 0, width, height, null );
g2d.dispose ();
}
}
return preview;
}
示例5
private void returnImage(HttpServletRequest request, HttpServletResponse response, TestCaseExecutionFile tc, String filePath) throws IOException {
int width = (!StringUtils.isEmpty(request.getParameter("w"))) ? Integer.valueOf(request.getParameter("w")) : 150;
int height = (!StringUtils.isEmpty(request.getParameter("h"))) ? Integer.valueOf(request.getParameter("h")) : 100;
Boolean real = request.getParameter("r") != null;
BufferedImage image = null;
BufferedImage b = null;
filePath = StringUtil.addSuffixIfNotAlready(filePath, File.separator);
File picture = new File(filePath + tc.getFileName());
LOG.debug("Accessing File : " + picture.getAbsolutePath());
try {
if (real) {
b = ImageIO.read(picture);
ImageIO.write(b, "png", response.getOutputStream());
} else {
image = ImageIO.read(picture);
// We test if file is too thin or too long. That prevent 500 error in case files are not compatible with resize. In that case, we crop the file.
if ((image.getHeight() * width / image.getWidth() < 10) || (image.getWidth() * height / image.getHeight() < 15)) {
LOG.debug("Image is too big of thin. Target Height : " + image.getHeight() * width / image.getWidth() + " Target Width : " + image.getWidth() * height / image.getHeight());
b = ImageIO.read(picture);
int minwidth = width;
if (width > image.getWidth()) {
minwidth = image.getWidth();
}
int minheight = height;
if (height > image.getHeight()) {
minheight = image.getHeight();
}
BufferedImage crop = ((BufferedImage) b).getSubimage(0, 0, minwidth, minheight);
b = crop;
response.setHeader("Format-Status", "ERROR");
response.setHeader("Format-Status-Message", "Image Crop from : " + image.getWidth() + "X" + image.getHeight() + " to : " + minwidth + "X" + minheight);
} else {
ResampleOp rop = new ResampleOp(DimensionConstrain.createMaxDimension(width, height, true));
rop.setNumberOfThreads(4);
b = rop.filter(image, null);
response.setHeader("Format-Status", "OK");
}
}
} catch (IOException e) {
}
SimpleDateFormat sdf = new SimpleDateFormat();
sdf.setTimeZone(new SimpleTimeZone(0, "GMT"));
sdf.applyPattern("dd MMM yyyy HH:mm:ss z");
response.setHeader("Last-Modified", sdf.format(DateUtils.addDays(Calendar.getInstance().getTime(), 2 * 360)));
response.setHeader("Expires", sdf.format(DateUtils.addDays(Calendar.getInstance().getTime(), 2 * 360)));
response.setHeader("Type", "PNG");
response.setHeader("Description", tc.getFileDesc());
ImageIO.write(b, "png", response.getOutputStream());
}
示例6
/**
* Processes requests for both HTTP <code>GET</code> and <code>POST</code>
* methods.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
* @throws CerberusException
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, CerberusException {
String charset = request.getCharacterEncoding() == null ? "UTF-8" : request.getCharacterEncoding();
String application = ParameterParserUtil.parseStringParamAndDecodeAndSanitize(request.getParameter("application"), "", charset);
String object = ParameterParserUtil.parseStringParamAndDecodeAndSanitize(request.getParameter("object"), "", charset);
int width = (!StringUtils.isEmpty(request.getParameter("w"))) ? Integer.valueOf(request.getParameter("w")) : -1;
int height = (!StringUtils.isEmpty(request.getParameter("h"))) ? Integer.valueOf(request.getParameter("h")) : -1;
ApplicationContext appContext = WebApplicationContextUtils.getWebApplicationContext(this.getServletContext());
IApplicationObjectService applicationObjectService = appContext.getBean(IApplicationObjectService.class);
BufferedImage image = applicationObjectService.readImageByKey(application, object);
BufferedImage b;
if (image != null) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
/**
* If width and height not defined, get image in real size
*/
if (width == -1 && height == -1) {
b = image;
} else {
ResampleOp rop = new ResampleOp(DimensionConstrain.createMaxDimension(width, height, true));
rop.setNumberOfThreads(4);
b = rop.filter(image, null);
}
ImageIO.write(b, "png", baos);
// byte[] bytesOut = baos.toByteArray();
} else {
// create a buffered image
ByteArrayInputStream bis = new ByteArrayInputStream(imageBytes);
b = ImageIO.read(bis);
bis.close();
}
SimpleDateFormat sdf = new SimpleDateFormat();
sdf.setTimeZone(new SimpleTimeZone(0, "GMT"));
sdf.applyPattern("dd MMM yyyy HH:mm:ss z");
response.setHeader("Last-Modified", sdf.format(DateUtils.addDays(Calendar.getInstance().getTime(), 2 * 360)));
response.setHeader("Expires", sdf.format(DateUtils.addDays(Calendar.getInstance().getTime(), 2 * 360)));
ImageIO.write(b, "png", response.getOutputStream());
}
