/**
* Loads an image from a URL
*
* @param bitmapFile the bitmap file
* @return the bitmap as BufferedImage
*/
public static BufferedImage getImage(File bitmapFile) {
try {
InputStream in = new java.io.FileInputStream(bitmapFile);
try {
in = new java.io.BufferedInputStream(in);
ImageTagRegistry reg = ImageTagRegistry.getRegistry();
Filter filt = reg.readStream(in);
if (filt == null) {
return null;
}
RenderedImage red = filt.createDefaultRendering();
if (red == null) {
return null;
}
BufferedImage img =
new BufferedImage(red.getWidth(), red.getHeight(), BufferedImage.TYPE_INT_ARGB);
red.copyData(img.getRaster());
return img;
} finally {
IOUtils.closeQuietly(in);
}
} catch (IOException e) {
return null;
}
}
/**
* Loads an image from a URL
*
* @param url the URL to the image
* @return the bitmap as BufferedImage TODO This method doesn't close the InputStream opened by
* the URL.
*/
public static BufferedImage getImage(URL url) {
ImageTagRegistry reg = ImageTagRegistry.getRegistry();
Filter filt = reg.readURL(new ParsedURL(url));
if (filt == null) {
return null;
}
RenderedImage red = filt.createDefaultRendering();
if (red == null) {
return null;
}
BufferedImage img =
new BufferedImage(red.getWidth(), red.getHeight(), BufferedImage.TYPE_INT_ARGB);
red.copyData(img.getRaster());
return img;
}
/**
* Converts a rendered image to a {@code BufferedImage}. This utility method has come from a forum
* post by Jim Moore at:
*
* <p><a href="http://www.jguru.com/faq/view.jsp?EID=114602">
* http://www.jguru.com/faq/view.jsp?EID=114602</a>
*
* @param img the rendered image.
* @return A buffered image.
*/
private static BufferedImage convertRenderedImage(RenderedImage img) {
if (img instanceof BufferedImage) {
return (BufferedImage) img;
}
ColorModel cm = img.getColorModel();
int width = img.getWidth();
int height = img.getHeight();
WritableRaster raster = cm.createCompatibleWritableRaster(width, height);
boolean isAlphaPremultiplied = cm.isAlphaPremultiplied();
Hashtable properties = new Hashtable();
String[] keys = img.getPropertyNames();
if (keys != null) {
for (int i = 0; i < keys.length; i++) {
properties.put(keys[i], img.getProperty(keys[i]));
}
}
BufferedImage result = new BufferedImage(cm, raster, isAlphaPremultiplied, properties);
img.copyData(raster);
return result;
}
/**
* Returns a contiguous <code>Raster</code> of data over the specified <code>Rectangle</code>. If
* the region is a sub-region of a single tile, then a child of that tile will be returned. If the
* region overlaps more than one tile and has 8 bits per sample, then a pixel interleaved Raster
* having band offsets 0,1,... will be returned. Otherwise the Raster returned by <code>
* im.copyData(null)</code> will be returned.
*/
private static final Raster getContiguousData(RenderedImage im, Rectangle region) {
if (im == null) {
throw new IllegalArgumentException("im == null");
} else if (region == null) {
throw new IllegalArgumentException("region == null");
}
Raster raster;
if (im.getNumXTiles() == 1 && im.getNumYTiles() == 1) {
// Image is not tiled so just get a reference to the tile.
raster = im.getTile(im.getMinTileX(), im.getMinTileY());
// Ensure result has requested coverage.
Rectangle bounds = raster.getBounds();
if (!bounds.equals(region)) {
raster =
raster.createChild(
region.x, region.y, region.width, region.height, region.x, region.y, null);
}
} else {
// Image is tiled.
// Create an interleaved raster for copying for 8-bit case.
// This ensures that for RGB data the band offsets are {0,1,2}.
SampleModel sampleModel = im.getSampleModel();
WritableRaster target =
sampleModel.getSampleSize(0) == 8
? Raster.createInterleavedRaster(
DataBuffer.TYPE_BYTE,
im.getWidth(),
im.getHeight(),
sampleModel.getNumBands(),
new Point(im.getMinX(), im.getMinY()))
: null;
// Copy the data.
raster = im.copyData(target);
}
return raster;
}
/** @see Graphics2D#drawRenderedImage(RenderedImage, AffineTransform) */
public void drawRenderedImage(RenderedImage img, AffineTransform xform) {
BufferedImage image = null;
if (img instanceof BufferedImage) {
image = (BufferedImage) img;
} else {
ColorModel cm = img.getColorModel();
int width = img.getWidth();
int height = img.getHeight();
WritableRaster raster = cm.createCompatibleWritableRaster(width, height);
boolean isAlphaPremultiplied = cm.isAlphaPremultiplied();
Hashtable properties = new Hashtable();
String[] keys = img.getPropertyNames();
if (keys != null) {
for (int i = 0; i < keys.length; i++) {
properties.put(keys[i], img.getProperty(keys[i]));
}
}
BufferedImage result = new BufferedImage(cm, raster, isAlphaPremultiplied, properties);
img.copyData(raster);
image = result;
}
drawImage(image, xform, null);
}
