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);
}