下面列出了怎么用java.awt.Transparency的API类实例代码及写法，或者点击链接到github查看源代码。
public D3DVolatileSurfaceManager(SunVolatileImage vImg, Object context) {
super(vImg, context);
/*
* We will attempt to accelerate this image only under the
* following conditions:
* - the image is opaque OR
* - the image is translucent AND
* - the GraphicsConfig supports the FBO extension OR
* - the GraphicsConfig has a stored alpha channel
*/
int transparency = vImg.getTransparency();
D3DGraphicsDevice gd = (D3DGraphicsDevice)
vImg.getGraphicsConfig().getDevice();
accelerationEnabled =
(transparency == Transparency.OPAQUE) ||
(transparency == Transparency.TRANSLUCENT &&
(gd.isCapPresent(CAPS_RT_PLAIN_ALPHA) ||
gd.isCapPresent(CAPS_RT_TEXTURE_ALPHA)));
}
/**
* Returns the custom buffered image, which mostly identical to
* BufferedImage.(w,h,TYPE_3BYTE_BGR), but uses the bigger scanlineStride.
* This means that the raster will have gaps, between the rows.
*/
private static BufferedImage makeCustomManagedBI() {
int w = 511, h = 255;
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
int[] nBits = {8, 8, 8};
int[] bOffs = {2, 1, 0};
ColorModel colorModel = new ComponentColorModel(cs, nBits, false, false,
Transparency.OPAQUE,
DataBuffer.TYPE_BYTE);
WritableRaster raster =
Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, w, h,
w * 3 + 2, 3, bOffs, null);
BufferedImage bi = new BufferedImage(colorModel, raster, true, null);
SunWritableRaster.makeTrackable(raster.getDataBuffer());
SunWritableRaster.markDirty(bi);
return bi;
}
/**
* Returns the custom buffered image, which mostly identical to
* BufferedImage.(w,h,TYPE_3BYTE_BGR), but uses the bigger scanlineStride.
* This means that the raster will have gaps, between the rows.
*/
private static BufferedImage makeCustomManagedBI() {
int w = 511, h = 255;
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
int[] nBits = {8, 8, 8};
int[] bOffs = {2, 1, 0};
ColorModel colorModel = new ComponentColorModel(cs, nBits, false, false,
Transparency.OPAQUE,
DataBuffer.TYPE_BYTE);
WritableRaster raster =
Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, w, h,
w * 3 + 2, 3, bOffs, null);
BufferedImage bi = new BufferedImage(colorModel, raster, true, null);
SunWritableRaster.makeTrackable(raster.getDataBuffer());
SunWritableRaster.markDirty(bi);
return bi;
}
public GLXVolatileSurfaceManager(SunVolatileImage vImg, Object context) {
super(vImg, context);
/*
* We will attempt to accelerate this image only under the
* following conditions:
* - the image is opaque OR
* - the image is translucent AND
* - the GraphicsConfig supports the FBO extension OR
* - the GraphicsConfig has a stored alpha channel
*/
int transparency = vImg.getTransparency();
GLXGraphicsConfig gc = (GLXGraphicsConfig)vImg.getGraphicsConfig();
accelerationEnabled =
(transparency == Transparency.OPAQUE) ||
((transparency == Transparency.TRANSLUCENT) &&
(gc.isCapPresent(CAPS_EXT_FBOBJECT) ||
gc.isCapPresent(CAPS_STORED_ALPHA)));
}
protected boolean scaleSurfaceData(SunGraphics2D sg,
Region clipRegion,
SurfaceData srcData,
SurfaceData dstData,
SurfaceType srcType,
SurfaceType dstType,
int sx1, int sy1,
int sx2, int sy2,
double dx1, double dy1,
double dx2, double dy2)
{
CompositeType comp = sg.imageComp;
if (CompositeType.SrcOverNoEa.equals(comp) &&
(srcData.getTransparency() == Transparency.OPAQUE))
{
comp = CompositeType.SrcNoEa;
}
ScaledBlit blit = ScaledBlit.getFromCache(srcType, comp, dstType);
if (blit != null) {
blit.Scale(srcData, dstData, sg.composite, clipRegion,
sx1, sy1, sx2, sy2, dx1, dy1, dx2, dy2);
return true;
}
return false;
}
void copyArea(SunGraphics2D sg2d,
int x, int y, int w, int h, int dx, int dy)
{
rq.lock();
try {
int ctxflags =
sg2d.surfaceData.getTransparency() == Transparency.OPAQUE ?
D3DContext.SRC_IS_OPAQUE : D3DContext.NO_CONTEXT_FLAGS;
D3DSurfaceData dstData;
try {
dstData = (D3DSurfaceData)sg2d.surfaceData;
} catch (ClassCastException e) {
throw new InvalidPipeException("wrong surface data type: " + sg2d.surfaceData);
}
D3DContext.validateContext(dstData, dstData,
sg2d.getCompClip(), sg2d.composite,
null, null, null, ctxflags);
rq.ensureCapacity(28);
buf.putInt(COPY_AREA);
buf.putInt(x).putInt(y).putInt(w).putInt(h);
buf.putInt(dx).putInt(dy);
} finally {
rq.unlock();
}
}
/**
* @param buf
* @return DataImage
*/
protected DataImage get32PlaneImage(MemBuffer buf) {
// create the color model
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
int[] nBits = { 8, 8, 8, 8 };
int[] bOffs = { 0, 1, 2, 3 };
ColorModel colorModel =
new ComponentColorModel(cs, nBits, true, false, Transparency.TRANSLUCENT,
DataBuffer.TYPE_BYTE);
int w = getWidth();
int h = getHeight();
WritableRaster raster =
Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, w, h, w * 4, 4, bOffs, null);
// create the image
BufferedImage image =
new BufferedImage(colorModel, raster, colorModel.isAlphaPremultiplied(), null);
byte[] dbuf = ((DataBufferByte) image.getRaster().getDataBuffer()).getData();
getPixelData(buf, dbuf);
return new BitmapDataImage(image);
}
@Override
public ColorModel getColorModel(int transparency) {
switch (transparency) {
case Transparency.OPAQUE:
// REMIND: once the ColorModel spec is changed, this should be
// an opaque premultiplied DCM...
return new DirectColorModel(24, 0xff0000, 0xff00, 0xff);
case Transparency.BITMASK:
return new DirectColorModel(25, 0xff0000, 0xff00, 0xff, 0x1000000);
case Transparency.TRANSLUCENT:
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
return new DirectColorModel(cs, 32,
0xff0000, 0xff00, 0xff, 0xff000000,
true, DataBuffer.TYPE_INT);
default:
return null;
}
}
@Override
public ColorModel getColorModel(int transparency) {
switch (transparency) {
case Transparency.OPAQUE:
// REMIND: once the ColorModel spec is changed, this should be
// an opaque premultiplied DCM...
return new DirectColorModel(24, 0xff0000, 0xff00, 0xff);
case Transparency.BITMASK:
return new DirectColorModel(25, 0xff0000, 0xff00, 0xff, 0x1000000);
case Transparency.TRANSLUCENT:
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
return new DirectColorModel(cs, 32,
0xff0000, 0xff00, 0xff, 0xff000000,
true, DataBuffer.TYPE_INT);
default:
return null;
}
}
private boolean initSurfaceNow() {
boolean isOpaque = (getTransparency() == Transparency.OPAQUE);
switch (type) {
case RT_PLAIN:
return initRTSurface(getNativeOps(), isOpaque);
case TEXTURE:
return initTexture(getNativeOps(), false/*isRTT*/, isOpaque);
case RT_TEXTURE:
return initTexture(getNativeOps(), true/*isRTT*/, isOpaque);
// REMIND: we may want to pass the exact type to the native
// level here so that we could choose the right presentation
// interval for the frontbuffer (immediate vs v-synced)
case WINDOW:
case FLIP_BACKBUFFER:
return initFlipBackbuffer(getNativeOps(), peer.getData(),
backBuffersNum, swapEffect,
syncType.id());
default:
return false;
}
}
@Override
public ColorModel getColorModel(int transparency) {
switch (transparency) {
case Transparency.OPAQUE:
// REMIND: once the ColorModel spec is changed, this should be
// an opaque premultiplied DCM...
return new DirectColorModel(24, 0xff0000, 0xff00, 0xff);
case Transparency.BITMASK:
return new DirectColorModel(25, 0xff0000, 0xff00, 0xff, 0x1000000);
case Transparency.TRANSLUCENT:
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
return new DirectColorModel(cs, 32,
0xff0000, 0xff00, 0xff, 0xff000000,
true, DataBuffer.TYPE_INT);
default:
return null;
}
}
void copyArea(SunGraphics2D sg2d,
int x, int y, int w, int h, int dx, int dy)
{
rq.lock();
try {
int ctxflags =
sg2d.surfaceData.getTransparency() == Transparency.OPAQUE ?
D3DContext.SRC_IS_OPAQUE : D3DContext.NO_CONTEXT_FLAGS;
D3DSurfaceData dstData;
try {
dstData = (D3DSurfaceData)sg2d.surfaceData;
} catch (ClassCastException e) {
throw new InvalidPipeException("wrong surface data type: " + sg2d.surfaceData);
}
D3DContext.validateContext(dstData, dstData,
sg2d.getCompClip(), sg2d.composite,
null, null, null, ctxflags);
rq.ensureCapacity(28);
buf.putInt(COPY_AREA);
buf.putInt(x).putInt(y).putInt(w).putInt(h);
buf.putInt(dx).putInt(dy);
} finally {
rq.unlock();
}
}
public WGLVolatileSurfaceManager(SunVolatileImage vImg, Object context) {
super(vImg, context);
/*
* We will attempt to accelerate this image only under the
* following conditions:
* - the image is opaque OR
* - the image is translucent AND
* - the GraphicsConfig supports the FBO extension OR
* - the GraphicsConfig has a stored alpha channel
*/
int transparency = vImg.getTransparency();
WGLGraphicsConfig gc = (WGLGraphicsConfig)vImg.getGraphicsConfig();
accelerationEnabled =
(transparency == Transparency.OPAQUE) ||
((transparency == Transparency.TRANSLUCENT) &&
(gc.isCapPresent(CAPS_EXT_FBOBJECT) ||
gc.isCapPresent(CAPS_STORED_ALPHA)));
}
public GLXVolatileSurfaceManager(SunVolatileImage vImg, Object context) {
super(vImg, context);
/*
* We will attempt to accelerate this image only under the
* following conditions:
* - the image is opaque OR
* - the image is translucent AND
* - the GraphicsConfig supports the FBO extension OR
* - the GraphicsConfig has a stored alpha channel
*/
int transparency = vImg.getTransparency();
GLXGraphicsConfig gc = (GLXGraphicsConfig)vImg.getGraphicsConfig();
accelerationEnabled =
(transparency == Transparency.OPAQUE) ||
((transparency == Transparency.TRANSLUCENT) &&
(gc.isCapPresent(CAPS_EXT_FBOBJECT) ||
gc.isCapPresent(CAPS_STORED_ALPHA)));
}
/**
* Create a pixmap-based SurfaceData object
*/
protected SurfaceData initAcceleratedSurface() {
SurfaceData sData;
try {
X11GraphicsConfig gc = (X11GraphicsConfig)vImg.getGraphicsConfig();
ColorModel cm = gc.getColorModel();
long drawable = 0;
if (context instanceof Long) {
drawable = ((Long)context).longValue();
}
sData = X11SurfaceData.createData(gc,
vImg.getWidth(),
vImg.getHeight(),
cm, vImg, drawable,
Transparency.OPAQUE);
} catch (NullPointerException ex) {
sData = null;
} catch (OutOfMemoryError er) {
sData = null;
}
return sData;
}
static Image getBMImage(GraphicsConfiguration gc,
int w, int h)
{
Image image =
gc.createCompatibleImage(w, h, Transparency.BITMASK);
initImage(gc, image);
return image;
}
/**
* Sets the Paint in the current graphics state.
* @param paint The Paint object to be used to generate color in
* the rendering process.
* @see java.awt.Graphics#setColor
* @see GradientPaint
* @see TexturePaint
*/
public void setPaint(Paint paint) {
if (paint instanceof Color) {
setColor((Color) paint);
return;
}
if (paint == null || this.paint == paint) {
return;
}
this.paint = paint;
if (imageComp == CompositeType.SrcOverNoEa) {
// special case where compState depends on opacity of paint
if (paint.getTransparency() == Transparency.OPAQUE) {
if (compositeState != COMP_ISCOPY) {
compositeState = COMP_ISCOPY;
}
} else {
if (compositeState == COMP_ISCOPY) {
compositeState = COMP_ALPHA;
}
}
}
Class<? extends Paint> paintClass = paint.getClass();
if (paintClass == GradientPaint.class) {
paintState = PAINT_GRADIENT;
} else if (paintClass == LinearGradientPaint.class) {
paintState = PAINT_LIN_GRADIENT;
} else if (paintClass == RadialGradientPaint.class) {
paintState = PAINT_RAD_GRADIENT;
} else if (paintClass == TexturePaint.class) {
paintState = PAINT_TEXTURE;
} else {
paintState = PAINT_CUSTOM;
}
validFontInfo = false;
invalidatePipe();
}
public static void init() {
destroot = new Group.EnableSet(TestEnvironment.globaloptroot,
"dest", "Output Destination Options");
new Screen();
new OffScreen();
if (GraphicsTests.hasGraphics2D) {
if (ImageTests.hasCompatImage) {
compatimgdestroot =
new Group.EnableSet(destroot, "compatimg",
"Compatible Image Destinations");
compatimgdestroot.setHorizontal();
new CompatImg();
new CompatImg(Transparency.OPAQUE);
new CompatImg(Transparency.BITMASK);
new CompatImg(Transparency.TRANSLUCENT);
}
if (ImageTests.hasVolatileImage) {
new VolatileImg();
}
bufimgdestroot = new Group.EnableSet(destroot, "bufimg",
"BufferedImage Destinations");
new BufImg(BufferedImage.TYPE_INT_RGB);
new BufImg(BufferedImage.TYPE_INT_ARGB);
new BufImg(BufferedImage.TYPE_INT_ARGB_PRE);
new BufImg(BufferedImage.TYPE_3BYTE_BGR);
new BufImg(BufferedImage.TYPE_BYTE_INDEXED);
new BufImg(BufferedImage.TYPE_BYTE_GRAY);
new CustomImg();
}
}
private SunVolatileImage(Component comp,
GraphicsConfiguration graphicsConfig,
int width, int height, Object context,
ImageCapabilities caps)
{
this(comp, graphicsConfig,
width, height, context, Transparency.OPAQUE, caps, UNDEFINED);
}
protected int findColorIndex(ColorNode aNode, Color aColor) {
if (transparency != Transparency.OPAQUE &&
aColor.getAlpha() != 0xff)
{
return 0; // default transparnt pixel
}
if (aNode.isLeaf) {
return aNode.paletteIndex;
} else {
int childIndex = getBranchIndex(aColor, aNode.level);
return findColorIndex(aNode.children[childIndex], aColor);
}
}
/**
* Returns the color model associated with this configuration that
* supports the specified transparency.
*/
public ColorModel getColorModel(int transparency) {
switch (transparency) {
case Transparency.OPAQUE:
return getColorModel();
case Transparency.BITMASK:
return new DirectColorModel(25, 0xff0000, 0xff00, 0xff, 0x1000000);
case Transparency.TRANSLUCENT:
return ColorModel.getRGBdefault();
default:
return null;
}
}
public static void init() {
destroot = new Group.EnableSet(TestEnvironment.globaloptroot,
"dest", "Output Destination Options");
new Screen();
new OffScreen();
if (GraphicsTests.hasGraphics2D) {
if (ImageTests.hasCompatImage) {
compatimgdestroot =
new Group.EnableSet(destroot, "compatimg",
"Compatible Image Destinations");
compatimgdestroot.setHorizontal();
new CompatImg();
new CompatImg(Transparency.OPAQUE);
new CompatImg(Transparency.BITMASK);
new CompatImg(Transparency.TRANSLUCENT);
}
if (ImageTests.hasVolatileImage) {
new VolatileImg();
}
bufimgdestroot = new Group.EnableSet(destroot, "bufimg",
"BufferedImage Destinations");
new BufImg(BufferedImage.TYPE_INT_RGB);
new BufImg(BufferedImage.TYPE_INT_ARGB);
new BufImg(BufferedImage.TYPE_INT_ARGB_PRE);
new BufImg(BufferedImage.TYPE_3BYTE_BGR);
new BufImg(BufferedImage.TYPE_BYTE_INDEXED);
new BufImg(BufferedImage.TYPE_BYTE_GRAY);
new CustomImg();
}
}
private static BufferedImage createCustomBuffer() {
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
ColorModel cm = new ComponentColorModel(cs, false, false,
Transparency.OPAQUE, DataBuffer.TYPE_FLOAT);
WritableRaster wr = cm.createCompatibleWritableRaster(width, height);
return new BufferedImage(cm, wr, false, null);
}
public DrawImageBg() {
super(imgtestroot, "drawimagebg", "drawImage(img, x, y, bg, obs);",
new Modifier.Filter() {
public boolean isCompatible(Object val) {
DrawableImage di = (DrawableImage) val;
return (di.getTransparency() != Transparency.OPAQUE);
}
});
}
/**
* Creates a new hidden-acceleration image of the given width and height
* that is associated with the target Component.
*/
public Image createAcceleratedImage(Component target,
int width, int height)
{
// As of 1.7 we no longer create pmoffscreens here...
ColorModel model = getColorModel(Transparency.OPAQUE);
WritableRaster wr =
model.createCompatibleWritableRaster(width, height);
return new OffScreenImage(target, model, wr,
model.isAlphaPremultiplied());
}
/**
* {@inheritDoc}
*
* @see sun.java2d.pipe.hw.AccelGraphicsConfig#createCompatibleVolatileImage
*/
@Override
public VolatileImage
createCompatibleVolatileImage(int width, int height,
int transparency, int type)
{
if (type == FLIP_BACKBUFFER || type == WINDOW || type == UNDEFINED ||
transparency == Transparency.BITMASK)
{
return null;
}
if (type == FBOBJECT) {
if (!isCapPresent(CAPS_EXT_FBOBJECT)) {
return null;
}
} else if (type == PBUFFER) {
boolean isOpaque = transparency == Transparency.OPAQUE;
if (!isOpaque && !isCapPresent(CAPS_STORED_ALPHA)) {
return null;
}
}
SunVolatileImage vi = new AccelTypedVolatileImage(this, width, height,
transparency, type);
Surface sd = vi.getDestSurface();
if (!(sd instanceof AccelSurface) ||
((AccelSurface)sd).getType() != type)
{
vi.flush();
vi = null;
}
return vi;
}
@Override
public boolean isSupportedOperation(SurfaceData srcData,
int txtype,
CompositeType comp,
Color bgColor)
{
return (bgColor == null || transparency == Transparency.OPAQUE);
}
@Override
public boolean isSupportedOperation(SurfaceData srcData,
int txtype,
CompositeType comp,
Color bgColor)
{
return comp.isDerivedFrom(CompositeType.AnyAlpha) &&
(bgColor == null || transparency == Transparency.OPAQUE);
}
/**
* {@inheritDoc}
*
* @see sun.java2d.pipe.hw.AccelGraphicsConfig#createCompatibleVolatileImage
*/
@Override
public VolatileImage
createCompatibleVolatileImage(int width, int height,
int transparency, int type)
{
if (type == FLIP_BACKBUFFER || type == WINDOW || type == UNDEFINED ||
transparency == Transparency.BITMASK)
{
return null;
}
if (type == FBOBJECT) {
if (!isCapPresent(CAPS_EXT_FBOBJECT)) {
return null;
}
} else if (type == PBUFFER) {
boolean isOpaque = transparency == Transparency.OPAQUE;
if (!isOpaque && !isCapPresent(CAPS_STORED_ALPHA)) {
return null;
}
}
SunVolatileImage vi = new AccelTypedVolatileImage(this, width, height,
transparency, type);
Surface sd = vi.getDestSurface();
if (!(sd instanceof AccelSurface) ||
((AccelSurface)sd).getType() != type)
{
vi.flush();
vi = null;
}
return vi;
}
public DrawImageBg() {
super(imgtestroot, "drawimagebg", "drawImage(img, x, y, bg, obs);",
new Modifier.Filter() {
public boolean isCompatible(Object val) {
DrawableImage di = (DrawableImage) val;
return (di.getTransparency() != Transparency.OPAQUE);
}
});
}