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*
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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package sun.java2d.pipe;
import java.awt.BasicStroke;
import java.awt.Rectangle;
import java.awt.Shape;
import java.awt.geom.Rectangle2D;
import sun.awt.SunHints;
import sun.java2d.ReentrantContext;
import sun.java2d.ReentrantContextProvider;
import sun.java2d.ReentrantContextProviderTL;
import sun.java2d.SunGraphics2D;
/**
* This class is used to convert raw geometry into 8-bit alpha tiles
* using an AATileGenerator for application by the next stage of
* the pipeline.
* This class sets up the Generator and computes the alpha tiles
* and then passes them on to a CompositePipe object for painting.
*/
public final class AAShapePipe
implements ShapeDrawPipe, ParallelogramPipe
{
static final RenderingEngine RDR_ENGINE = RenderingEngine.getInstance();
// Per-thread TileState (~1K very small so do not use any Weak Reference)
private static final ReentrantContextProvider<TileState> TILE_STATE_PROVIDER =
new ReentrantContextProviderTL<TileState>(
ReentrantContextProvider.REF_HARD)
{
@Override
protected TileState newContext() {
return new TileState();
}
};
final CompositePipe outpipe;
public AAShapePipe(CompositePipe pipe) {
outpipe = pipe;
}
@Override
public void draw(SunGraphics2D sg, Shape s) {
final BasicStroke bs;
if (sg.stroke instanceof BasicStroke) {
bs = (BasicStroke) sg.stroke;
} else {
s = sg.stroke.createStrokedShape(s);
bs = null;
}
renderPath(sg, s, bs);
}
@Override
public void fill(SunGraphics2D sg, Shape s) {
renderPath(sg, s, null);
}
@Override
public void fillParallelogram(SunGraphics2D sg,
double ux1, double uy1,
double ux2, double uy2,
double x, double y,
double dx1, double dy1,
double dx2, double dy2)
{
final TileState ts = TILE_STATE_PROVIDER.acquire();
try {
final int[] abox = ts.abox;
final AATileGenerator aatg =
RDR_ENGINE.getAATileGenerator(x, y, dx1, dy1, dx2, dy2, 0, 0,
sg.getCompClip(), abox);
if (aatg != null) {
renderTiles(sg, ts.computeBBox(ux1, uy1, ux2, uy2),
aatg, abox, ts);
}
} finally {
TILE_STATE_PROVIDER.release(ts);
}
}
@Override
public void drawParallelogram(SunGraphics2D sg,
double ux1, double uy1,
double ux2, double uy2,
double x, double y,
double dx1, double dy1,
double dx2, double dy2,
double lw1, double lw2)
{
final TileState ts = TILE_STATE_PROVIDER.acquire();
try {
final int[] abox = ts.abox;
final AATileGenerator aatg =
RDR_ENGINE.getAATileGenerator(x, y, dx1, dy1, dx2, dy2, lw1,
lw2, sg.getCompClip(), abox);
if (aatg != null) {
// Note that bbox is of the original shape, not the wide path.
// This is appropriate for handing to Paint methods...
renderTiles(sg, ts.computeBBox(ux1, uy1, ux2, uy2),
aatg, abox, ts);
}
} finally {
TILE_STATE_PROVIDER.release(ts);
}
}
public void renderPath(SunGraphics2D sg, Shape s, BasicStroke bs) {
final boolean adjust = (bs != null &&
sg.strokeHint != SunHints.INTVAL_STROKE_PURE);
final boolean thin = (sg.strokeState <= SunGraphics2D.STROKE_THINDASHED);
final TileState ts = TILE_STATE_PROVIDER.acquire();
try {
final int[] abox = ts.abox;
final AATileGenerator aatg =
RDR_ENGINE.getAATileGenerator(s, sg.transform, sg.getCompClip(),
bs, thin, adjust, abox);
if (aatg != null) {
renderTiles(sg, s, aatg, abox, ts);
}
} finally {
TILE_STATE_PROVIDER.release(ts);
}
}
public void renderTiles(SunGraphics2D sg, Shape s,
final AATileGenerator aatg,
final int[] abox, final TileState ts)
{
Object context = null;
try {
// reentrance: outpipe may also use AAShapePipe:
context = outpipe.startSequence(sg, s,
ts.computeDevBox(abox),
abox);
// copy of int[] abox as local variables for performance:
final int x0 = abox[0];
final int y0 = abox[1];
final int x1 = abox[2];
final int y1 = abox[3];
final int tw = aatg.getTileWidth();
final int th = aatg.getTileHeight();
// get tile from thread local storage:
final byte[] alpha = ts.getAlphaTile(tw * th);
byte[] atile;
for (int y = y0; y < y1; y += th) {
final int h = Math.min(th, y1 - y);
for (int x = x0; x < x1; x += tw) {
final int w = Math.min(tw, x1 - x);
final int a = aatg.getTypicalAlpha();
if (a == 0x00 || !outpipe.needTile(context, x, y, w, h)) {
aatg.nextTile();
outpipe.skipTile(context, x, y);
continue;
}
if (a == 0xff) {
atile = null;
aatg.nextTile();
} else {
atile = alpha;
aatg.getAlpha(alpha, 0, tw);
}
outpipe.renderPathTile(context, atile, 0, tw, x, y, w, h);
}
}
} finally {
aatg.dispose();
if (context != null) {
outpipe.endSequence(context);
}
}
}
// Tile state used by AAShapePipe
static final class TileState extends ReentrantContext {
// cached tile (32 x 32 tile by default)
private byte[] theTile = new byte[32 * 32];
// dirty aabox array
final int[] abox = new int[4];
// dirty bbox rectangle
private final Rectangle dev = new Rectangle();
// dirty bbox rectangle2D.Double
private final Rectangle2D.Double bbox2D = new Rectangle2D.Double();
byte[] getAlphaTile(int len) {
byte[] t = theTile;
if (t.length < len) {
/**代码未完, 请加载全部代码(NowJava.com).**/