@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());
}
});
}
}
private void setSurfaces(AccelSurface srcData, AccelSurface dstData) {
// assert rq.lock.isHeldByCurrentThread();
rq.ensureCapacityAndAlignment(20, 4);
buf.putInt(SET_SURFACES);
buf.putLong(srcData.getNativeOps());
buf.putLong(dstData.getNativeOps());
}
private void setComposite(Composite comp, int flags) {
// assert rq.lock.isHeldByCurrentThread();
if (comp instanceof AlphaComposite) {
AlphaComposite ac = (AlphaComposite) comp;
rq.ensureCapacity(16);
buf.putInt(SET_ALPHA_COMPOSITE);
buf.putInt(ac.getRule());
buf.putFloat(ac.getAlpha());
buf.putInt(flags);
} else if (comp instanceof XORComposite) {
int xorPixel = ((XORComposite) comp).getXorPixel();
rq.ensureCapacity(8);
buf.putInt(SET_XOR_COMPOSITE);
buf.putInt(xorPixel);
} else {
throw new InternalError("not yet implemented");
}
}
private void setTransform(AffineTransform xform) {
// assert rq.lock.isHeldByCurrentThread();
rq.ensureCapacityAndAlignment(52, 4);
buf.putInt(SET_TRANSFORM);
buf.putDouble(xform.getScaleX());
buf.putDouble(xform.getShearY());
buf.putDouble(xform.getShearX());
buf.putDouble(xform.getScaleY());
buf.putDouble(xform.getTranslateX());
buf.putDouble(xform.getTranslateY());
}
private void setClip(Region clip) {
// assert rq.lock.isHeldByCurrentThread();
if (clip.isRectangular()) {
rq.ensureCapacity(20);
buf.putInt(SET_RECT_CLIP);
buf.putInt(clip.getLoX()).putInt(clip.getLoY());
buf.putInt(clip.getHiX()).putInt(clip.getHiY());
} else {
rq.ensureCapacity(28); // so that we have room for at least a span
buf.putInt(BEGIN_SHAPE_CLIP);
buf.putInt(SET_SHAPE_CLIP_SPANS);
// include a placeholder for the span count
int countIndex = buf.position();
buf.putInt(0);
int spanCount = 0;
int remainingSpans = buf.remaining() / BYTES_PER_SPAN;
int span[] = new int[4];
SpanIterator si = clip.getSpanIterator();
while (si.nextSpan(span)) {
if (remainingSpans == 0) {
buf.putInt(countIndex, spanCount);
rq.flushNow();
buf.putInt(SET_SHAPE_CLIP_SPANS);
countIndex = buf.position();
buf.putInt(0);
spanCount = 0;
remainingSpans = buf.remaining() / BYTES_PER_SPAN;
}
buf.putInt(span[0]); // x1
buf.putInt(span[1]); // y1
buf.putInt(span[2]); // x2
buf.putInt(span[3]); // y2
spanCount++;
remainingSpans--;
}
buf.putInt(countIndex, spanCount);
rq.ensureCapacity(4);
buf.putInt(END_SHAPE_CLIP);
}
}
protected BufferedContext(RenderQueue rq) {
this.rq = rq;
this.buf = rq.getBuffer();
}
private void resetTransform() {
// assert rq.lock.isHeldByCurrentThread();
rq.ensureCapacity(4);
buf.putInt(RESET_TRANSFORM);
}
private void resetComposite() {
// assert rq.lock.isHeldByCurrentThread();
rq.ensureCapacity(4);
buf.putInt(RESET_COMPOSITE);
}
private void resetClip() {
// assert rq.lock.isHeldByCurrentThread();
rq.ensureCapacity(4);
buf.putInt(RESET_CLIP);
}
