Examples of sun.java2d.pipe.ShapeSpanIterator

sun.java2d.pipe.ShapeSpanIterator
This class can iterate individual span elements generated by scan converting a Shape. This particular implementation flattens the incoming path and then performs simple polygon tracing to calculate the spans. Note that this class holds pointers to native data which must be disposed. It is not marked as finalizable since it is intended to be very lightweight and finalization is a comparitively expensive procedure. The caller must specifically use try{} finally{} to manually ensure that the object is disposed after use, otherwise native data structures might be leaked. Here is a code sample for using this class: public void fillShape(Shape s, Rectangle clipRect) { ShapeSpanIterator ssi = new ShapeSpanIterator(false); try { ssi.setOutputArea(clipRect); ssi.appendPath(s.getPathIterator(null)); int spanbox[] = new int[4]; while (ssi.nextSpan(spanbox)) { int x = spanbox[0]; int y = spanbox[1]; int w = spanbox[2] - x; int h = spanbox[3] - y; fillRect(x, y, w, h); } } finally { ssi.dispose(); } }

                clipRegion = devClip.getIntersection(usrClip.getBounds());
            }
        } else {
            PathIterator cpi = usrClip.getPathIterator(null);
            int box[] = new int[4];
            ShapeSpanIterator sr = LoopPipe.getFillSSI(this);
            try {
                sr.setOutputArea(devClip);
                sr.appendPath(cpi);
                sr.getPathBox(box);
                Region r = Region.getInstance(box);
                r.appendSpans(sr);
                clipRegion = r;
                clipState =
                    r.isRectangular() ? CLIP_RECTANGULAR : CLIP_SHAPE;
            } finally {
                sr.dispose();
            }
        }
        if (origClipState != clipState &&
            (clipState == CLIP_SHAPE || origClipState == CLIP_SHAPE))
        {

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    public void draw(SunGraphics2D sg2d, Shape s) {
        if (sg2d.strokeState == sg2d.STROKE_THIN) {
            doShape(sg2d, s, false);
        } else if (sg2d.strokeState < sg2d.STROKE_CUSTOM) {
            ShapeSpanIterator si = LoopPipe.getStrokeSpans(sg2d, s);
            try {
                doFillSpans(sg2d, si);
            } finally {
                si.dispose();
            }
        } else {
            doShape(sg2d, sg2d.stroke.createStrokedShape(s), true);
        }
    }

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            }
            if (p.npoints > 1) {
                drawPolyline(sg2d, p.xpoints, p.ypoints, p.npoints);
            }
        } else if (sg2d.strokeState < sg2d.STROKE_CUSTOM) {
            ShapeSpanIterator si = LoopPipe.getStrokeSpans(sg2d, s);
            try {
                synchronized (D3DContext.LOCK) {
                    int ctxflags = (sg2d.eargb >>> 24) == 0xff ?
                        SRC_IS_OPAQUE : NO_CONTEXT_FLAGS;
                    // in this case the spans will be pre-transformed, so we
                    // pass null transform to getContext
                    long pCtx = D3DContext.getContext(null, sg2d.surfaceData,
                                                      sg2d.getCompClip(),
                                                      sg2d.getComposite(),
                                                      null /*transform*/,
                                                      sg2d.eargb/*pixel*/,
                                                      ctxflags);
                    devFillSpans(sg2d.surfaceData.getNativeOps(), pCtx, si,
                                 si.getNativeIterator(), 0, 0);
                }
            } finally {
                si.dispose();
            }
        } else {
            fill(sg2d, sg2d.stroke.createStrokedShape(s));
        }
    }

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            // Transform will be done by the PathIterator
            at = sg2d.transform;
            transx = transy = 0;
        }


        ShapeSpanIterator ssi = LoopPipe.getFillSSI(sg2d);
        try {
            // Subtract transx/y from the SSI clip to match the
            // (potentially untranslated) geometry fed to it
            Region clip = sg2d.getCompClip();
            ssi.setOutputAreaXYXY(clip.getLoX() - transx,
                                  clip.getLoY() - transy,
                                  clip.getHiX() - transx,
                                  clip.getHiY() - transy);
            ssi.appendPath(s.getPathIterator(at));
            synchronized (D3DContext.LOCK) {
                int ctxflags = (sg2d.eargb >>> 24) == 0xff ?
                    SRC_IS_OPAQUE : NO_CONTEXT_FLAGS;
                long pCtx = D3DContext.getContext(null, sg2d.surfaceData,
                                                  sg2d.getCompClip(),
                                                  sg2d.getComposite(),
                                                  null/*transform*/,
                                                  sg2d.eargb/*pixel*/,
                                                  ctxflags);
                devFillSpans(sg2d.surfaceData.getNativeOps(), pCtx, ssi,
                             ssi.getNativeIterator(),
                             transx, transy);
            }
        } finally {
            ssi.dispose();
        }
    }

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                transx = 0;
                transy = 0;
            }
            drawPath(sg2d, p2df, transx, transy);
        } else if (sg2d.strokeState < SunGraphics2D.STROKE_CUSTOM) {
            ShapeSpanIterator si = LoopPipe.getStrokeSpans(sg2d, s);
            try {
                fillSpans(sg2d, si, 0, 0);
            } finally {
                si.dispose();
            }
        } else {
            fill(sg2d, sg2d.stroke.createStrokedShape(s));
        }
    }

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            // Transform will be done by the PathIterator
            at = sg2d.transform;
            transx = transy = 0;
        }


        ShapeSpanIterator ssi = LoopPipe.getFillSSI(sg2d);
        try {
            // Subtract transx/y from the SSI clip to match the
            // (potentially untranslated) geometry fed to it
            Region clip = sg2d.getCompClip();
            ssi.setOutputAreaXYXY(clip.getLoX() - transx,
                                  clip.getLoY() - transy,
                                  clip.getHiX() - transx,
                                  clip.getHiY() - transy);
            ssi.appendPath(s.getPathIterator(at));
            fillSpans(sg2d, ssi, transx, transy);
        } finally {
            ssi.dispose();
        }
    }

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                   clipRegion = devClip.getIntersection(usrClip.getBounds());
               }
           } else {
               PathIterator cpi = usrClip.getPathIterator(null);
               int box[] = new int[4];
               ShapeSpanIterator sr = new ShapeSpanIterator(this, false);
               try {
                   sr.setOutputArea(devClip);
                   sr.appendPath(cpi);
                   sr.getPathBox(box);
                   Region r = Region.getInstance(box);
                   r.appendSpans(sr);
                   clipRegion = r;
                   clipState = r.isRectangular() ? CLIP_RECTANGULAR :
                                                    CLIP_SHAPE;
               } finally {
                   sr.dispose();
               }
           }
        }
        if (origClipState != clipState &&
            (clipState == CLIP_SHAPE || origClipState == CLIP_SHAPE))

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            doPath(sg2d, s, false);
        } else if (sg2d.strokeState < sg2d.STROKE_CUSTOM) {
            // REMIND: X11 can handle uniform scaled wide lines
            // and dashed lines itself if we set the appropriate
            // XGC attributes (TBD).
            ShapeSpanIterator si = LoopPipe.getStrokeSpans(sg2d, s);
            try {
                SunToolkit.awtLock();
                try {
                    long xgc = validate(sg2d);
                    XFillSpans(sg2d.surfaceData.getNativeOps(), xgc,
                               si, si.getNativeIterator(),
                               0, 0);
                } finally {
                    SunToolkit.awtUnlock();
                }
            } finally {
                si.dispose();
            }
        } else {
            fill(sg2d, sg2d.stroke.createStrokedShape(s));
        }
    }

View Full Code Here

            // Transform will be done by the PathIterator
            at = sg2d.transform;
            transx = transy = 0;
        }


        ShapeSpanIterator ssi = LoopPipe.getFillSSI(sg2d);
        try {
            // Subtract transx/y from the SSI clip to match the
            // (potentially untranslated) geometry fed to it
            Region clip = sg2d.getCompClip();
            ssi.setOutputAreaXYXY(clip.getLoX() - transx,
                                  clip.getLoY() - transy,
                                  clip.getHiX() - transx,
                                  clip.getHiY() - transy);
            ssi.appendPath(s.getPathIterator(at));
            SunToolkit.awtLock();
            try {
                long xgc = validate(sg2d);
                XFillSpans(sg2d.surfaceData.getNativeOps(), xgc,
                           ssi, ssi.getNativeIterator(),
                           transx, transy);
            } finally {
                SunToolkit.awtUnlock();
            }
        } finally {
            ssi.dispose();
        }
    }

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