/**
* Sets one or more icons for the Display.
*
* <ul>
* <li>On Windows you should supply at least one 16x16 icon and one 32x32.
* <li>Linux (and similar platforms) expect one 32x32 icon.
* <li>Mac OS X should be supplied one 128x128 icon
* </ul>
*
* The implementation will use the supplied ByteBuffers with image data in RGBA and perform any
* conversions nescesarry for the specific platform.
*
* @param icons Array of icons in RGBA mode
* @return number of icons used.
*/
public int setIcon(ByteBuffer[] icons) {
boolean done_small = false;
boolean done_large = false;
int used = 0;
int small_icon_size = 16;
int large_icon_size = 32;
for (ByteBuffer icon : icons) {
int size = icon.limit() / 4;
if ((((int) Math.sqrt(size)) == small_icon_size) && (!done_small)) {
long small_new_icon = createIcon(small_icon_size, small_icon_size, icon.asIntBuffer());
sendMessage(hwnd, WM_SETICON, ICON_SMALL, small_new_icon);
freeSmallIcon();
small_icon = small_new_icon;
used++;
done_small = true;
}
if ((((int) Math.sqrt(size)) == large_icon_size) && (!done_large)) {
long large_new_icon = createIcon(large_icon_size, large_icon_size, icon.asIntBuffer());
sendMessage(hwnd, WM_SETICON, ICON_BIG, large_new_icon);
freeLargeIcon();
large_icon = large_new_icon;
used++;
done_large = true;
// Problem: The taskbar icon won't update until Windows sends a WM_GETICON to our window
// proc and we reply. But this method is usually called
// on init and it might take a while before the next call to nUpdate (because of resources
// being loaded, etc). So we wait for the next
// WM_GETICON message (usually received about 100ms after WM_SETICON) to make sure the
// taskbar icon has updated before we return to the user.
// (We wouldn't need to do this if the event loop was running continuously on its own
// thread.)
iconsLoaded = false;
// Track how long the wait takes and give up at 500ms, just in case.
long time = System.nanoTime();
long MAX_WAIT = 500L * 1000L * 1000L;
while (true) {
nUpdate();
if (iconsLoaded || MAX_WAIT < System.nanoTime() - time) break;
Thread.yield();
}
}
}
return used;
}
/**
* Copy ARGB pixels to a ByteBuffer without changing the ARGB byte order. If used to make a
* texture, the pixel format is GL12.GL_BGRA. With this format we can leave pixels in ARGB order
* (faster), but unfortunately I had problems building mipmaps in BGRA format
* (GLU.gluBuild2DMipmaps() did not recognize GL_UNSIGNED_INT_8_8_8_8 and
* GL_UNSIGNED_INT_8_8_8_8_REV types so screwed up the BGRA/ARGB byte order on Mac).
*
* @return ByteBuffer
*/
public static ByteBuffer convertImagePixelsARGB(
int[] jpixels, int imgw, int imgh, boolean flipVertically) {
// flip Y axis
if (flipVertically) {
jpixels = flipPixels(jpixels, imgw, imgh); // flip Y axis
}
// put int pixels into Byte Buffer
ByteBuffer bb = GLApp.allocBytes(jpixels.length * 4); // 4 bytes per pixel
bb.asIntBuffer().put(jpixels);
return bb;
}
private void readPalette() {
RandomAccessFile rIn = null;
ByteBuffer buf = null;
int i;
try {
if (paletteFile != null) {
// see if the file exists, if not, set it to the default palette.
File file = new File(paletteFile);
numPaletteEntries = (int) (file.length() / 4);
buf = ByteBuffer.allocate(numPaletteEntries * 4);
rIn = new RandomAccessFile(paletteFile, "r");
FileChannel inChannel = rIn.getChannel();
inChannel.position(0);
inChannel.read(buf);
// Check the byte order.
buf.order(ByteOrder.LITTLE_ENDIAN);
buf.rewind();
IntBuffer ib = buf.asIntBuffer();
paletteData = new int[numPaletteEntries];
ib.get(paletteData);
ib = null;
}
} catch (Exception e) {
System.err.println("Caught exception: " + e.toString());
System.err.println(e.getStackTrace());
} finally {
if (rIn != null) {
try {
rIn.close();
} catch (Exception e) {
}
}
}
}