下面列出了java.awt.AlphaComposite#getRule ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* Method contributed by Alexej Suchov
* @see Graphics2D#setComposite(Composite)
*/
public void setComposite(Composite comp) {
if (comp instanceof AlphaComposite) {
AlphaComposite composite = (AlphaComposite) comp;
if (composite.getRule() == 3) {
alpha = composite.getAlpha();
this.composite = composite;
if (realPaint != null && (realPaint instanceof Color)) {
Color c = (Color) realPaint;
paint = new Color(c.getRed(), c.getGreen(), c.getBlue(),
(int) (c.getAlpha() * alpha));
}
return;
}
}
this.composite = comp;
alpha = 1.0F;
}
/**
* Sets the current color for this graphics context.
*
* @param color the color (<code>null</code> permitted but ignored).
*
* @see #getColor()
*/
public void setColor(Color color) {
if (color == null) {
return;
}
org.eclipse.swt.graphics.Color swtColor = getSwtColorFromPool(color);
this.gc.setForeground(swtColor);
// handle transparency and compositing.
if (this.composite instanceof AlphaComposite) {
AlphaComposite acomp = (AlphaComposite) this.composite;
switch (acomp.getRule()) {
case AlphaComposite.SRC_OVER:
this.gc.setAlpha((int) (color.getAlpha() * acomp.getAlpha()));
break;
default:
this.gc.setAlpha(color.getAlpha());
break;
}
}
}
/**
* Record information about drawing done
* with the supplied {@code Composite}.
*/
private void checkAlpha(Composite composite) {
if (composite instanceof AlphaComposite) {
AlphaComposite alphaComposite = (AlphaComposite) composite;
float alpha = alphaComposite.getAlpha();
int rule = alphaComposite.getRule();
if (alpha != 1.0
|| (rule != AlphaComposite.SRC
&& rule != AlphaComposite.SRC_OVER)) {
mHasCompositing = true;
}
} else {
mHasCompositing = true;
}
}
/**
* Record information about drawing done
* with the supplied <code>Composite</code>.
*/
private void checkAlpha(Composite composite) {
if (composite instanceof AlphaComposite) {
AlphaComposite alphaComposite = (AlphaComposite) composite;
float alpha = alphaComposite.getAlpha();
int rule = alphaComposite.getRule();
if (alpha != 1.0
|| (rule != AlphaComposite.SRC
&& rule != AlphaComposite.SRC_OVER)) {
mHasCompositing = true;
}
} else {
mHasCompositing = true;
}
}
/**
* Record information about drawing done
* with the supplied <code>Composite</code>.
*/
private void checkAlpha(Composite composite) {
if (composite instanceof AlphaComposite) {
AlphaComposite alphaComposite = (AlphaComposite) composite;
float alpha = alphaComposite.getAlpha();
int rule = alphaComposite.getRule();
if (alpha != 1.0
|| (rule != AlphaComposite.SRC
&& rule != AlphaComposite.SRC_OVER)) {
mHasCompositing = true;
}
} else {
mHasCompositing = true;
}
}
/**
* Record information about drawing done
* with the supplied <code>Composite</code>.
*/
private void checkAlpha(Composite composite) {
if (composite instanceof AlphaComposite) {
AlphaComposite alphaComposite = (AlphaComposite) composite;
float alpha = alphaComposite.getAlpha();
int rule = alphaComposite.getRule();
if (alpha != 1.0
|| (rule != AlphaComposite.SRC
&& rule != AlphaComposite.SRC_OVER)) {
mHasCompositing = true;
}
} else {
mHasCompositing = true;
}
}
/**
* Sets the current color for this graphics context.
*
* @param color the color (<code>null</code> permitted but ignored).
*
* @see #getColor()
*/
public void setColor(Color color) {
if (color == null) {
return;
}
org.eclipse.swt.graphics.Color swtColor = getSwtColorFromPool(color);
this.gc.setForeground(swtColor);
// handle transparency and compositing.
if (this.composite instanceof AlphaComposite) {
AlphaComposite acomp = (AlphaComposite) this.composite;
switch (acomp.getRule()) {
case AlphaComposite.SRC_OVER:
this.gc.setAlpha((int) (color.getAlpha() * acomp.getAlpha()));
break;
default:
this.gc.setAlpha(color.getAlpha());
break;
}
}
}
/**
* Method contributed by Alexej Suchov
*
* @see Graphics2D#setPaint(Paint)
*/
@Override
public void setPaint( final Paint paint ) {
if ( paint == null ) {
return;
}
this.paint = paint;
realPaint = paint;
if ( ( composite instanceof AlphaComposite ) && ( paint instanceof Color ) ) {
final AlphaComposite co = (AlphaComposite) composite;
if ( co.getRule() == 3 ) {
final Color c = (Color) paint;
this.paint = new Color( c.getRed(), c.getGreen(), c.getBlue(), (int) ( c.getAlpha() * alpha ) );
realPaint = paint;
}
}
}
/**
* Method contributed by Alexej Suchov
*
* @see Graphics2D#setComposite(Composite)
*/
@Override
public void setComposite(Composite comp) {
if (comp instanceof AlphaComposite) {
AlphaComposite composite = (AlphaComposite) comp;
if (composite.getRule() == 3) {
alpha = composite.getAlpha();
this.composite = composite;
if (realPaint != null && realPaint instanceof Color) {
Color c = (Color) realPaint;
paint = new Color(c.getRed(), c.getGreen(), c.getBlue(), (int) (c.getAlpha() * alpha));
}
return;
}
}
composite = comp;
alpha = 1.0F;
}
/**
* Sets the current color for this graphics context.
*
* @param color the color (<code>null</code> permitted but ignored).
*
* @see #getColor()
*/
public void setColor(Color color) {
if (color == null) {
return;
}
org.eclipse.swt.graphics.Color swtColor = getSwtColorFromPool(color);
this.gc.setForeground(swtColor);
// handle transparency and compositing.
if (this.composite instanceof AlphaComposite) {
AlphaComposite acomp = (AlphaComposite) this.composite;
switch (acomp.getRule()) {
case AlphaComposite.SRC_OVER:
this.gc.setAlpha((int) (color.getAlpha() * acomp.getAlpha()));
break;
default:
this.gc.setAlpha(color.getAlpha());
break;
}
}
}
/**
* Record information about drawing done
* with the supplied <code>Composite</code>.
*/
private void checkAlpha(Composite composite) {
if (composite instanceof AlphaComposite) {
AlphaComposite alphaComposite = (AlphaComposite) composite;
float alpha = alphaComposite.getAlpha();
int rule = alphaComposite.getRule();
if (alpha != 1.0
|| (rule != AlphaComposite.SRC
&& rule != AlphaComposite.SRC_OVER)) {
mHasCompositing = true;
}
} else {
mHasCompositing = true;
}
}
/**
* Record information about drawing done
* with the supplied <code>Composite</code>.
*/
private void checkAlpha(Composite composite) {
if (composite instanceof AlphaComposite) {
AlphaComposite alphaComposite = (AlphaComposite) composite;
float alpha = alphaComposite.getAlpha();
int rule = alphaComposite.getRule();
if (alpha != 1.0
|| (rule != AlphaComposite.SRC
&& rule != AlphaComposite.SRC_OVER)) {
mHasCompositing = true;
}
} else {
mHasCompositing = true;
}
}
/**
* Return a CompositeType object for the specified AlphaComposite
* rule.
*/
public static CompositeType forAlphaComposite(AlphaComposite ac) {
switch (ac.getRule()) {
case AlphaComposite.CLEAR:
return Clear;
case AlphaComposite.SRC:
if (ac.getAlpha() >= 1.0f) {
return SrcNoEa;
} else {
return Src;
}
case AlphaComposite.DST:
return Dst;
case AlphaComposite.SRC_OVER:
if (ac.getAlpha() >= 1.0f) {
return SrcOverNoEa;
} else {
return SrcOver;
}
case AlphaComposite.DST_OVER:
return DstOver;
case AlphaComposite.SRC_IN:
return SrcIn;
case AlphaComposite.DST_IN:
return DstIn;
case AlphaComposite.SRC_OUT:
return SrcOut;
case AlphaComposite.DST_OUT:
return DstOut;
case AlphaComposite.SRC_ATOP:
return SrcAtop;
case AlphaComposite.DST_ATOP:
return DstAtop;
case AlphaComposite.XOR:
return AlphaXor;
default:
throw new InternalError("Unrecognized alpha rule");
}
}
/**
* Return a CompositeType object for the specified AlphaComposite
* rule.
*/
public static CompositeType forAlphaComposite(AlphaComposite ac) {
switch (ac.getRule()) {
case AlphaComposite.CLEAR:
return Clear;
case AlphaComposite.SRC:
if (ac.getAlpha() >= 1.0f) {
return SrcNoEa;
} else {
return Src;
}
case AlphaComposite.DST:
return Dst;
case AlphaComposite.SRC_OVER:
if (ac.getAlpha() >= 1.0f) {
return SrcOverNoEa;
} else {
return SrcOver;
}
case AlphaComposite.DST_OVER:
return DstOver;
case AlphaComposite.SRC_IN:
return SrcIn;
case AlphaComposite.DST_IN:
return DstIn;
case AlphaComposite.SRC_OUT:
return SrcOut;
case AlphaComposite.DST_OUT:
return DstOut;
case AlphaComposite.SRC_ATOP:
return SrcAtop;
case AlphaComposite.DST_ATOP:
return DstAtop;
case AlphaComposite.XOR:
return AlphaXor;
default:
throw new InternalError("Unrecognized alpha rule");
}
}
private boolean canHandleComposite(Composite c) {
if (c instanceof AlphaComposite) {
AlphaComposite ac = (AlphaComposite)c;
return ac.getRule() == AlphaComposite.SRC_OVER && ac.getAlpha() >= 1f;
}
return false;
}
/**
* Return a CompositeType object for the specified AlphaComposite
* rule.
*/
public static CompositeType forAlphaComposite(AlphaComposite ac) {
switch (ac.getRule()) {
case AlphaComposite.CLEAR:
return Clear;
case AlphaComposite.SRC:
if (ac.getAlpha() >= 1.0f) {
return SrcNoEa;
} else {
return Src;
}
case AlphaComposite.DST:
return Dst;
case AlphaComposite.SRC_OVER:
if (ac.getAlpha() >= 1.0f) {
return SrcOverNoEa;
} else {
return SrcOver;
}
case AlphaComposite.DST_OVER:
return DstOver;
case AlphaComposite.SRC_IN:
return SrcIn;
case AlphaComposite.DST_IN:
return DstIn;
case AlphaComposite.SRC_OUT:
return SrcOut;
case AlphaComposite.DST_OUT:
return DstOut;
case AlphaComposite.SRC_ATOP:
return SrcAtop;
case AlphaComposite.DST_ATOP:
return DstAtop;
case AlphaComposite.XOR:
return AlphaXor;
default:
throw new InternalError("Unrecognized alpha rule");
}
}
/**
* Return a CompositeType object for the specified AlphaComposite
* rule.
*/
public static CompositeType forAlphaComposite(AlphaComposite ac) {
switch (ac.getRule()) {
case AlphaComposite.CLEAR:
return Clear;
case AlphaComposite.SRC:
if (ac.getAlpha() >= 1.0f) {
return SrcNoEa;
} else {
return Src;
}
case AlphaComposite.DST:
return Dst;
case AlphaComposite.SRC_OVER:
if (ac.getAlpha() >= 1.0f) {
return SrcOverNoEa;
} else {
return SrcOver;
}
case AlphaComposite.DST_OVER:
return DstOver;
case AlphaComposite.SRC_IN:
return SrcIn;
case AlphaComposite.DST_IN:
return DstIn;
case AlphaComposite.SRC_OUT:
return SrcOut;
case AlphaComposite.DST_OUT:
return DstOut;
case AlphaComposite.SRC_ATOP:
return SrcAtop;
case AlphaComposite.DST_ATOP:
return DstAtop;
case AlphaComposite.XOR:
return AlphaXor;
default:
throw new InternalError("Unrecognized alpha rule");
}
}
private boolean canHandleComposite(Composite c) {
if (c instanceof AlphaComposite) {
AlphaComposite ac = (AlphaComposite)c;
return ac.getRule() == AlphaComposite.SRC_OVER && ac.getAlpha() >= 1f;
}
return false;
}
@Override
public void MaskFill(SunGraphics2D sg2d, SurfaceData sData,
Composite comp,
final int x, final int y, final int w, final int h,
final byte[] mask,
final int maskoff, final int maskscan)
{
AlphaComposite acomp = (AlphaComposite)comp;
if (acomp.getRule() != AlphaComposite.SRC_OVER) {
comp = AlphaComposite.SrcOver;
}
rq.lock();
try {
validateContext(sg2d, comp, BufferedContext.USE_MASK);
// we adjust the mask length so that the mask ends on a
// 4-byte boundary
int maskBytesRequired;
if (mask != null) {
// we adjust the mask length so that the mask ends on a
// 4-byte boundary
maskBytesRequired = (mask.length + 3) & (~3);
} else {
// mask not needed
maskBytesRequired = 0;
}
int totalBytesRequired = 32 + maskBytesRequired;
RenderBuffer buf = rq.getBuffer();
if (totalBytesRequired <= buf.capacity()) {
if (totalBytesRequired > buf.remaining()) {
// process the queue first and then enqueue the mask
rq.flushNow();
}
buf.putInt(MASK_FILL);
// enqueue parameters
buf.putInt(x).putInt(y).putInt(w).putInt(h);
buf.putInt(maskoff);
buf.putInt(maskscan);
buf.putInt(maskBytesRequired);
if (mask != null) {
// enqueue the mask
int padding = maskBytesRequired - mask.length;
buf.put(mask);
if (padding != 0) {
buf.position(buf.position() + padding);
}
}
} else {
// queue is too small to accommodate entire mask; perform
// the operation directly on the queue flushing thread
rq.flushAndInvokeNow(new Runnable() {
public void run() {
maskFill(x, y, w, h,
maskoff, maskscan, mask.length, mask);
}
});
}
} finally {
rq.unlock();
}
}
@Override
public void MaskBlit(SurfaceData src, SurfaceData dst,
Composite comp, Region clip,
int srcx, int srcy,
int dstx, int dsty,
int width, int height,
byte[] mask, int maskoff, int maskscan)
{
if (width <= 0 || height <= 0) {
return;
}
if (mask == null) {
// no mask involved; delegate to regular blit loop
if (blitop == null) {
blitop = Blit.getFromCache(src.getSurfaceType(),
CompositeType.AnyAlpha,
this.getDestType());
}
blitop.Blit(src, dst,
comp, clip,
srcx, srcy, dstx, dsty,
width, height);
return;
}
AlphaComposite acomp = (AlphaComposite)comp;
if (acomp.getRule() != AlphaComposite.SRC_OVER) {
comp = AlphaComposite.SrcOver;
}
rq.lock();
try {
validateContext(dst, comp, clip);
RenderBuffer buf = rq.getBuffer();
int totalBytesRequired = 20 + (width * height * 4);
/*
* REMIND: we should fix this so that it works with tiles that
* are larger than the entire buffer, but the native
* OGL/D3DMaskBlit isn't even prepared for tiles larger
* than 32x32 pixels, so there's no urgency here...
*/
rq.ensureCapacity(totalBytesRequired);
// enqueue parameters and tile pixels
int newpos = enqueueTile(buf.getAddress(), buf.position(),
src, src.getNativeOps(), srcTypeVal,
mask, mask.length, maskoff, maskscan,
srcx, srcy, dstx, dsty,
width, height);
buf.position(newpos);
} finally {
rq.unlock();
}
}