@Override
protected void drawGlyphList(SunGraphics2D sg2d, GlyphList gl) {
/*
* The native drawGlyphList() only works with two composite types:
* - CompositeType.SrcOver (with any extra alpha), or
* - CompositeType.Xor
*/
Composite comp = sg2d.composite;
if (comp == AlphaComposite.Src) {
/*
* In addition to the composite types listed above, the logic
* in OGL/D3DSurfaceData.validatePipe() allows for
* CompositeType.SrcNoEa, but only in the presence of an opaque
* color. If we reach this case, we know the color is opaque,
* and therefore SrcNoEa is the same as SrcOverNoEa, so we
* override the composite here.
*/
comp = AlphaComposite.SrcOver;
}
rq.lock();
try {
validateContext(sg2d, comp);
enqueueGlyphList(sg2d, gl);
} finally {
rq.unlock();
}
}
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());
}
});
}
}