private void enqueueGlyphList(final SunGraphics2D sg2d, final GlyphList gl) {
// assert rq.lock.isHeldByCurrentThread();
RenderBuffer buf = rq.getBuffer();
final int totalGlyphs = gl.getNumGlyphs();
int glyphBytesRequired = totalGlyphs * BYTES_PER_GLYPH_IMAGE;
int posBytesRequired = gl.usePositions() ? totalGlyphs * BYTES_PER_GLYPH_POSITION : 0;
int totalBytesRequired = 24 + glyphBytesRequired + posBytesRequired;
final long[] images = gl.getImages();
final float glyphListOrigX = gl.getX() + 0.5f;
final float glyphListOrigY = gl.getY() + 0.5f;
// make sure the RenderQueue keeps a hard reference to the FontStrike
// so that the associated glyph images are not disposed while enqueued
rq.addReference(gl.getStrike());
if (totalBytesRequired <= buf.capacity()) {
if (totalBytesRequired > buf.remaining()) {
// process the queue first and then enqueue the glyphs
rq.flushNow();
}
rq.ensureAlignment(20);
buf.putInt(DRAW_GLYPH_LIST);
// enqueue parameters
buf.putInt(totalGlyphs);
buf.putInt(createPackedParams(sg2d, gl));
buf.putFloat(glyphListOrigX);
buf.putFloat(glyphListOrigY);
// now enqueue glyph information
buf.put(images, 0, totalGlyphs);
if (gl.usePositions()) {
float[] positions = gl.getPositions();
buf.put(positions, 0, 2 * totalGlyphs);
}
} else {
// queue is too small to accomodate glyphs; perform
// the operation directly on the queue flushing thread
rq.flushAndInvokeNow(
new Runnable() {
public void run() {
drawGlyphList(
totalGlyphs,
gl.usePositions(),
gl.isSubPixPos(),
gl.isRGBOrder(),
sg2d.lcdTextContrast,
glyphListOrigX,
glyphListOrigY,
images,
gl.getPositions());
}
});
}
}
/**
* Packs the given parameters into a single int value in order to save space on the rendering
* queue. Note that most of these parameters are only used for rendering LCD-optimized text, but
* conditionalizing this work wouldn't make any impact on performance, so we will pack those
* parameters even in the non-LCD case.
*/
private static int createPackedParams(SunGraphics2D sg2d, GlyphList gl) {
return (((gl.usePositions() ? 1 : 0) << OFFSET_POSITIONS)
| ((gl.isSubPixPos() ? 1 : 0) << OFFSET_SUBPIXPOS)
| ((gl.isRGBOrder() ? 1 : 0) << OFFSET_RGBORDER)
| ((sg2d.lcdTextContrast & 0xff) << OFFSET_CONTRAST));
}