/** Frees the resources */
void freeResources() {
if (images != null) {
for (Image image : images) {
if (image != null) image.dispose();
}
images = null;
}
}
protected Graphics getBufferGraphics() {
if (bufferImage == null) {
bufferImage = createImage(getSize().width, getSize().height);
buffer_graphics = bufferImage.getGraphics();
}
return buffer_graphics;
}
/**
* Prepare a buffer for the image, return if the canvas is ready Only need to call this when the
* size of the canvas is changed, Since we automatically detect the size change in paint() only
* call this on start
*/
public boolean newImgBuf() {
Dimension sz = getSize();
if (sz.width == 0 || sz.height == 0) return false;
// quit if the current image already has the right size
if (img != null && imgG != null && sz.equals(imgSize)) return true;
img = createImage(sz.width, sz.height);
if (imgG != null) imgG.dispose();
imgG = img.getGraphics();
imgSize = sz;
return true;
}
/** Make (scale down) the thumbnail */
private Image makeThumbnail(Image imageOriginal) {
double ratio = (double) imageOriginal.getWidth(null) / (double) imageOriginal.getHeight(null);
int b = THUMBNAIL.width;
int h = THUMBNAIL.height;
if (ratio > 0) {
b = (int) (h * ratio);
} else {
h = (int) (b * ratio);
}
if (b == 0 || h == 0) {
System.out.println(
"ERROR makeThumbnail: width = " + b + ", height = " + h + ", imageRation = " + ratio);
System.out.println(
" Workaround: width = " + THUMBNAIL.width + ", height = " + THUMBNAIL.height);
b = THUMBNAIL.width;
h = THUMBNAIL.height;
}
return getScaledImage(imageOriginal, b, h);
}
private void writeToFile(File selectedFile, ImageWriterSpiFileFilter ff) {
try {
ImageOutputStream ios = ImageIO.createImageOutputStream(selectedFile);
ImageWriter iw = ff.getImageWriterSpi().createWriterInstance();
iw.setOutput(ios);
ImageWriteParam iwp = iw.getDefaultWriteParam();
if (iwp.canWriteCompressed()) {
iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
// set maximum image quality
iwp.setCompressionQuality(1.f);
}
Image image = viewerPanel.getImage();
BufferedImage bufferedImage;
if (viewerPanel.getImage() instanceof BufferedImage)
bufferedImage = (BufferedImage) viewerPanel.getImage();
else {
bufferedImage =
new BufferedImage(
image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_INT_RGB);
bufferedImage.createGraphics().drawImage(image, 0, 0, null);
}
iw.write(null, new IIOImage(bufferedImage, null, null), iwp);
iw.dispose();
ios.close();
} catch (IOException ioe) {
JOptionPane.showMessageDialog(
viewerPanel,
messagesBundle.getString(
"ImageViewerPanelSaveAction." + "Error_during_image_saving_message_7"),
//$NON-NLS-1$
messagesBundle.getString("ImageViewerPanelSaveAction." + "Error_dialog_title_8"),
//$NON-NLS-1$
JOptionPane.ERROR_MESSAGE);
ioe.printStackTrace();
}
}
/** Make (scale down) the thumbnail */
private Image getScaledImage(Image image, int breite, int hoehe) {
Image scaledImage = image.getScaledInstance(breite, hoehe, Image.SCALE_DEFAULT);
try {
MediaTracker mediaTracker = new MediaTracker(new Container());
mediaTracker.addImage(scaledImage, 0);
mediaTracker.waitForID(0);
} catch (InterruptedException e) {
return null;
}
return scaledImage;
}
/**
* the constructor of the class
*
* @param image an image
*/
protected ImageRepresentation(Image image) {
this.largeImage = image;
this.smallImage =
image.getScaledInstance(smallImageSize.width, smallImageSize.height, Image.SCALE_SMOOTH);
}
public void onDispose() {
image.flush();
image = null;
}
/**
* calls drawImage(Image,int,int,int,int,Color,ImageObserver)
*
* @see #drawImage(Image,int,int,int,int,Color,ImageObserver)
*/
public boolean drawImage(Image img, int x, int y, Color bgcolor, ImageObserver observer) {
return drawImage(img, x, y, img.getWidth(observer), img.getHeight(observer), bgcolor, observer);
}