/** Initializes the ImageDisplay. */
private synchronized void initialize() {
if (source == null) return;
componentWidth = source.getWidth();
componentHeight = source.getHeight();
setPreferredSize(new Dimension(componentWidth, componentHeight));
this.sampleModel = source.getSampleModel();
// First check whether the opimage has already set a suitable ColorModel
this.colorModel = source.getColorModel();
if (this.colorModel == null) {
// If not, then create one.
this.colorModel = PlanarImage.createColorModel(this.sampleModel);
if (this.colorModel == null) {
throw new IllegalArgumentException("no color model");
}
}
minTileX = source.getMinTileX();
maxTileX = source.getMinTileX() + source.getNumXTiles() - 1;
minTileY = source.getMinTileY();
maxTileY = source.getMinTileY() + source.getNumYTiles() - 1;
tileWidth = source.getTileWidth();
tileHeight = source.getTileHeight();
tileGridXOffset = source.getTileGridXOffset();
tileGridYOffset = source.getTileGridYOffset();
}
/** Records a new size. Called by the AWT. */
public void setBounds(int x, int y, int width, int height) {
Insets insets = getInsets();
int w;
int h;
if (source == null) {
w = width;
h = height;
} else {
w = source.getWidth();
h = source.getHeight();
if (width < w) {
w = width;
}
if (height < h) {
h = height;
}
}
componentWidth = w + insets.left + insets.right;
componentHeight = h + insets.top + insets.bottom;
super.setBounds(x + shift_x, y + shift_y, componentWidth, componentHeight);
}
/**
* Paint the image onto a Graphics object. The painting is performed tile-by-tile, and includes a
* grey region covering the unused portion of image tiles as well as the general background. At
* this point the image must be byte data.
*/
public synchronized void paintComponent(Graphics g) {
Graphics2D g2D = null;
if (g instanceof Graphics2D) {
g2D = (Graphics2D) g;
} else {
return;
}
// if source is null, it's just a component
if (source == null) {
g2D.setColor(getBackground());
g2D.fillRect(0, 0, componentWidth, componentHeight);
return;
}
int transX = -originX;
int transY = -originY;
// Get the clipping rectangle and translate it into image coordinates.
Rectangle clipBounds = g.getClipBounds();
if (clipBounds == null) {
clipBounds = new Rectangle(0, 0, componentWidth, componentHeight);
}
// clear the background (clip it) [minimal optimization here]
if (transX > 0
|| transY > 0
|| transX < (componentWidth - source.getWidth())
|| transY < (componentHeight - source.getHeight())) {
g2D.setColor(getBackground());
g2D.fillRect(0, 0, componentWidth, componentHeight);
}
clipBounds.translate(-transX, -transY);
// Determine the extent of the clipping region in tile coordinates.
int txmin, txmax, tymin, tymax;
int ti, tj;
txmin = XtoTileX(clipBounds.x);
txmin = Math.max(txmin, minTileX);
txmin = Math.min(txmin, maxTileX);
txmax = XtoTileX(clipBounds.x + clipBounds.width - 1);
txmax = Math.max(txmax, minTileX);
txmax = Math.min(txmax, maxTileX);
tymin = YtoTileY(clipBounds.y);
tymin = Math.max(tymin, minTileY);
tymin = Math.min(tymin, maxTileY);
tymax = YtoTileY(clipBounds.y + clipBounds.height - 1);
tymax = Math.max(tymax, minTileY);
tymax = Math.min(tymax, maxTileY);
Insets insets = getInsets();
// Loop over tiles within the clipping region
for (tj = tymin; tj <= tymax; tj++) {
for (ti = txmin; ti <= txmax; ti++) {
int tx = TileXtoX(ti);
int ty = TileYtoY(tj);
Raster tile = source.getTile(ti, tj);
if (tile != null) {
DataBuffer dataBuffer = tile.getDataBuffer();
WritableRaster wr = tile.createWritableRaster(sampleModel, dataBuffer, null);
BufferedImage bi =
new BufferedImage(colorModel, wr, colorModel.isAlphaPremultiplied(), null);
// correctly handles band offsets
if (brightnessEnabled == true) {
SampleModel sm =
sampleModel.createCompatibleSampleModel(tile.getWidth(), tile.getHeight());
WritableRaster raster = RasterFactory.createWritableRaster(sm, null);
BufferedImage bimg =
new BufferedImage(colorModel, raster, colorModel.isAlphaPremultiplied(), null);
// don't move this code
ByteLookupTable lutTable = new ByteLookupTable(0, lutData);
LookupOp lookup = new LookupOp(lutTable, null);
lookup.filter(bi, bimg);
g2D.drawImage(bimg, biop, tx + transX + insets.left, ty + transY + insets.top);
} else {
AffineTransform transform;
transform =
AffineTransform.getTranslateInstance(
tx + transX + insets.left, ty + transY + insets.top);
g2D.drawRenderedImage(bi, transform);
}
}
}
}
}