public Haikdu(String filename) {
try {
familySource.Open(filename);
int success = wrappedSource.Open(familySource, true);
if (success < 0) {
familySource.Close();
wrappedSource.Close();
rawSource = new Kdu_simple_file_source(filename);
}
if (rawSource != null) compositor.Create(rawSource);
else compositor.Create(wrappedSource);
int numThreads = Kdu_global.Kdu_get_num_processors();
threadEnv.Create();
for (int thread = 1; thread < numThreads; thread++)
if (!threadEnv.Add_thread()) numThreads = thread;
compositor.Set_thread_env(threadEnv, null);
compositor.Add_ilayer(0, new Kdu_dims(), new Kdu_dims());
compositor.Set_scale(false, false, false, 0.050f);
// Determine dimensions for the rendered result and start processing.
compositor.Get_total_composition_dims(viewDims);
viewSize = viewDims.Access_size();
// Construct Swing frame
imagePanel = new ImagePanel(viewSize);
addWindowListener(
new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
getContentPane().add("Center", imagePanel);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
setTitle("Haikdu");
setVisible(true);
repaint();
Kdu_coords displaySize = new Kdu_coords(imagePanel.getWidth(), imagePanel.getHeight());
if (viewSize.Get_x() > displaySize.Get_x()) viewSize.Set_x(displaySize.Get_y());
if (viewSize.Get_y() > displaySize.Get_y()) viewSize.Set_y(displaySize.Get_y());
compositor.Set_buffer_surface(viewDims);
compositorBuffer = compositor.Get_composition_buffer(viewDims);
} catch (KduException e) {
System.err.printf("Caught exception during Kdu object construction: %s\n", e.getMessage());
}
render();
}
public void cleanup() {
try {
if (compositor != null) compositor.Native_destroy();
threadEnv.Destroy();
threadEnv.Native_destroy();
wrappedSource.Native_destroy();
familySource.Native_destroy();
if (rawSource != null) rawSource.Native_destroy();
} catch (KduException e) {
System.err.printf("Exception on Kdu object cleanup: %s\n", e.getMessage());
}
}
public void render() {
try {
int regionBufferSize = 0;
int[] regionBuffer = null;
Kdu_dims newRegion = new Kdu_dims();
long kduRenderStart = System.nanoTime();
while (compositor.Process(100000, newRegion)) {
Kdu_coords newOffset = newRegion.Access_pos();
Kdu_coords newSize = newRegion.Access_size();
newOffset.Subtract(viewDims.Access_pos());
int newPixels = newSize.Get_x() * newSize.Get_y();
if (newPixels == 0) continue;
else if (newPixels > regionBufferSize) {
regionBufferSize = newPixels;
regionBuffer = new int[regionBufferSize];
}
compositorBuffer.Get_region(newRegion, regionBuffer);
imagePanel.putRegion(
viewSize.Get_x(),
viewSize.Get_y(),
newSize.Get_x(),
newSize.Get_y(),
newOffset.Get_x(),
newOffset.Get_y(),
regionBuffer);
}
long kduRenderEnd = System.nanoTime();
System.out.printf(
"Processed using %d concurrent threads of execution in %.4fms\n",
threadEnv.Get_num_threads(), (kduRenderEnd - kduRenderStart) * 1e-6);
imagePanel.repaint();
} catch (KduException e) {
System.err.printf(
"Caught exception '%s'; code '%s'\n",
e.getMessage(), Integer.toHexString(e.Get_kdu_exception_code()));
}
}