--- a/src/java.desktop/share/classes/sun/java2d/pisces/PiscesRenderingEngine.java Fri Nov 24 17:19:47 2017 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,656 +0,0 @@
-/*
- * Copyright (c) 2007, 2014, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * 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).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package sun.java2d.pisces;
-
-import java.awt.Shape;
-import java.awt.BasicStroke;
-import java.awt.geom.Path2D;
-import java.awt.geom.AffineTransform;
-import java.awt.geom.PathIterator;
-
-import sun.awt.geom.PathConsumer2D;
-import sun.java2d.pipe.Region;
-import sun.java2d.pipe.RenderingEngine;
-import sun.java2d.pipe.AATileGenerator;
-
-public class PiscesRenderingEngine extends RenderingEngine {
- private static enum NormMode {OFF, ON_NO_AA, ON_WITH_AA}
-
- /**
- * Create a widened path as specified by the parameters.
- * <p>
- * The specified {@code src} {@link Shape} is widened according
- * to the specified attribute parameters as per the
- * {@link BasicStroke} specification.
- *
- * @param src the source path to be widened
- * @param width the width of the widened path as per {@code BasicStroke}
- * @param caps the end cap decorations as per {@code BasicStroke}
- * @param join the segment join decorations as per {@code BasicStroke}
- * @param miterlimit the miter limit as per {@code BasicStroke}
- * @param dashes the dash length array as per {@code BasicStroke}
- * @param dashphase the initial dash phase as per {@code BasicStroke}
- * @return the widened path stored in a new {@code Shape} object
- * @since 1.7
- */
- public Shape createStrokedShape(Shape src,
- float width,
- int caps,
- int join,
- float miterlimit,
- float dashes[],
- float dashphase)
- {
- final Path2D p2d = new Path2D.Float();
-
- strokeTo(src,
- null,
- width,
- NormMode.OFF,
- caps,
- join,
- miterlimit,
- dashes,
- dashphase,
- new PathConsumer2D() {
- public void moveTo(float x0, float y0) {
- p2d.moveTo(x0, y0);
- }
- public void lineTo(float x1, float y1) {
- p2d.lineTo(x1, y1);
- }
- public void closePath() {
- p2d.closePath();
- }
- public void pathDone() {}
- public void curveTo(float x1, float y1,
- float x2, float y2,
- float x3, float y3) {
- p2d.curveTo(x1, y1, x2, y2, x3, y3);
- }
- public void quadTo(float x1, float y1, float x2, float y2) {
- p2d.quadTo(x1, y1, x2, y2);
- }
- public long getNativeConsumer() {
- throw new InternalError("Not using a native peer");
- }
- });
- return p2d;
- }
-
- /**
- * Sends the geometry for a widened path as specified by the parameters
- * to the specified consumer.
- * <p>
- * The specified {@code src} {@link Shape} is widened according
- * to the parameters specified by the {@link BasicStroke} object.
- * Adjustments are made to the path as appropriate for the
- * {@link java.awt.RenderingHints#VALUE_STROKE_NORMALIZE} hint if the
- * {@code normalize} boolean parameter is true.
- * Adjustments are made to the path as appropriate for the
- * {@link java.awt.RenderingHints#VALUE_ANTIALIAS_ON} hint if the
- * {@code antialias} boolean parameter is true.
- * <p>
- * The geometry of the widened path is forwarded to the indicated
- * {@link PathConsumer2D} object as it is calculated.
- *
- * @param src the source path to be widened
- * @param bs the {@code BasicSroke} object specifying the
- * decorations to be applied to the widened path
- * @param normalize indicates whether stroke normalization should
- * be applied
- * @param antialias indicates whether or not adjustments appropriate
- * to antialiased rendering should be applied
- * @param consumer the {@code PathConsumer2D} instance to forward
- * the widened geometry to
- * @since 1.7
- */
- public void strokeTo(Shape src,
- AffineTransform at,
- BasicStroke bs,
- boolean thin,
- boolean normalize,
- boolean antialias,
- final PathConsumer2D consumer)
- {
- NormMode norm = (normalize) ?
- ((antialias) ? NormMode.ON_WITH_AA : NormMode.ON_NO_AA)
- : NormMode.OFF;
- strokeTo(src, at, bs, thin, norm, antialias, consumer);
- }
-
- void strokeTo(Shape src,
- AffineTransform at,
- BasicStroke bs,
- boolean thin,
- NormMode normalize,
- boolean antialias,
- PathConsumer2D pc2d)
- {
- float lw;
- if (thin) {
- if (antialias) {
- lw = userSpaceLineWidth(at, 0.5f);
- } else {
- lw = userSpaceLineWidth(at, 1.0f);
- }
- } else {
- lw = bs.getLineWidth();
- }
- strokeTo(src,
- at,
- lw,
- normalize,
- bs.getEndCap(),
- bs.getLineJoin(),
- bs.getMiterLimit(),
- bs.getDashArray(),
- bs.getDashPhase(),
- pc2d);
- }
-
- private float userSpaceLineWidth(AffineTransform at, float lw) {
-
- double widthScale;
-
- if ((at.getType() & (AffineTransform.TYPE_GENERAL_TRANSFORM |
- AffineTransform.TYPE_GENERAL_SCALE)) != 0) {
- widthScale = Math.sqrt(at.getDeterminant());
- } else {
- /* First calculate the "maximum scale" of this transform. */
- double A = at.getScaleX(); // m00
- double C = at.getShearX(); // m01
- double B = at.getShearY(); // m10
- double D = at.getScaleY(); // m11
-
- /*
- * Given a 2 x 2 affine matrix [ A B ] such that
- * [ C D ]
- * v' = [x' y'] = [Ax + Cy, Bx + Dy], we want to
- * find the maximum magnitude (norm) of the vector v'
- * with the constraint (x^2 + y^2 = 1).
- * The equation to maximize is
- * |v'| = sqrt((Ax+Cy)^2+(Bx+Dy)^2)
- * or |v'| = sqrt((AA+BB)x^2 + 2(AC+BD)xy + (CC+DD)y^2).
- * Since sqrt is monotonic we can maximize |v'|^2
- * instead and plug in the substitution y = sqrt(1 - x^2).
- * Trigonometric equalities can then be used to get
- * rid of most of the sqrt terms.
- */
-
- double EA = A*A + B*B; // x^2 coefficient
- double EB = 2*(A*C + B*D); // xy coefficient
- double EC = C*C + D*D; // y^2 coefficient
-
- /*
- * There is a lot of calculus omitted here.
- *
- * Conceptually, in the interests of understanding the
- * terms that the calculus produced we can consider
- * that EA and EC end up providing the lengths along
- * the major axes and the hypot term ends up being an
- * adjustment for the additional length along the off-axis
- * angle of rotated or sheared ellipses as well as an
- * adjustment for the fact that the equation below
- * averages the two major axis lengths. (Notice that
- * the hypot term contains a part which resolves to the
- * difference of these two axis lengths in the absence
- * of rotation.)
- *
- * In the calculus, the ratio of the EB and (EA-EC) terms
- * ends up being the tangent of 2*theta where theta is
- * the angle that the long axis of the ellipse makes
- * with the horizontal axis. Thus, this equation is
- * calculating the length of the hypotenuse of a triangle
- * along that axis.
- */
-
- double hypot = Math.sqrt(EB*EB + (EA-EC)*(EA-EC));
- /* sqrt omitted, compare to squared limits below. */
- double widthsquared = ((EA + EC + hypot)/2.0);
-
- widthScale = Math.sqrt(widthsquared);
- }
-
- return (float) (lw / widthScale);
- }
-
- void strokeTo(Shape src,
- AffineTransform at,
- float width,
- NormMode normalize,
- int caps,
- int join,
- float miterlimit,
- float dashes[],
- float dashphase,
- PathConsumer2D pc2d)
- {
- // We use strokerat and outat so that in Stroker and Dasher we can work only
- // with the pre-transformation coordinates. This will repeat a lot of
- // computations done in the path iterator, but the alternative is to
- // work with transformed paths and compute untransformed coordinates
- // as needed. This would be faster but I do not think the complexity
- // of working with both untransformed and transformed coordinates in
- // the same code is worth it.
- // However, if a path's width is constant after a transformation,
- // we can skip all this untransforming.
-
- // If normalization is off we save some transformations by not
- // transforming the input to pisces. Instead, we apply the
- // transformation after the path processing has been done.
- // We can't do this if normalization is on, because it isn't a good
- // idea to normalize before the transformation is applied.
- AffineTransform strokerat = null;
- AffineTransform outat = null;
-
- PathIterator pi = null;
-
- if (at != null && !at.isIdentity()) {
- final double a = at.getScaleX();
- final double b = at.getShearX();
- final double c = at.getShearY();
- final double d = at.getScaleY();
- final double det = a * d - c * b;
- if (Math.abs(det) <= 2 * Float.MIN_VALUE) {
- // this rendering engine takes one dimensional curves and turns
- // them into 2D shapes by giving them width.
- // However, if everything is to be passed through a singular
- // transformation, these 2D shapes will be squashed down to 1D
- // again so, nothing can be drawn.
-
- // Every path needs an initial moveTo and a pathDone. If these
- // are not there this causes a SIGSEGV in libawt.so (at the time
- // of writing of this comment (September 16, 2010)). Actually,
- // I am not sure if the moveTo is necessary to avoid the SIGSEGV
- // but the pathDone is definitely needed.
- pc2d.moveTo(0, 0);
- pc2d.pathDone();
- return;
- }
-
- // If the transform is a constant multiple of an orthogonal transformation
- // then every length is just multiplied by a constant, so we just
- // need to transform input paths to stroker and tell stroker
- // the scaled width. This condition is satisfied if
- // a*b == -c*d && a*a+c*c == b*b+d*d. In the actual check below, we
- // leave a bit of room for error.
- if (nearZero(a*b + c*d, 2) && nearZero(a*a+c*c - (b*b+d*d), 2)) {
- double scale = Math.sqrt(a*a + c*c);
- if (dashes != null) {
- dashes = java.util.Arrays.copyOf(dashes, dashes.length);
- for (int i = 0; i < dashes.length; i++) {
- dashes[i] = (float)(scale * dashes[i]);
- }
- dashphase = (float)(scale * dashphase);
- }
- width = (float)(scale * width);
- pi = src.getPathIterator(at);
- if (normalize != NormMode.OFF) {
- pi = new NormalizingPathIterator(pi, normalize);
- }
- // by now strokerat == null && outat == null. Input paths to
- // stroker (and maybe dasher) will have the full transform at
- // applied to them and nothing will happen to the output paths.
- } else {
- if (normalize != NormMode.OFF) {
- strokerat = at;
- pi = src.getPathIterator(at);
- pi = new NormalizingPathIterator(pi, normalize);
- // by now strokerat == at && outat == null. Input paths to
- // stroker (and maybe dasher) will have the full transform at
- // applied to them, then they will be normalized, and then
- // the inverse of *only the non translation part of at* will
- // be applied to the normalized paths. This won't cause problems
- // in stroker, because, suppose at = T*A, where T is just the
- // translation part of at, and A is the rest. T*A has already
- // been applied to Stroker/Dasher's input. Then Ainv will be
- // applied. Ainv*T*A is not equal to T, but it is a translation,
- // which means that none of stroker's assumptions about its
- // input will be violated. After all this, A will be applied
- // to stroker's output.
- } else {
- outat = at;
- pi = src.getPathIterator(null);
- // outat == at && strokerat == null. This is because if no
- // normalization is done, we can just apply all our
- // transformations to stroker's output.
- }
- }
- } else {
- // either at is null or it's the identity. In either case
- // we don't transform the path.
- pi = src.getPathIterator(null);
- if (normalize != NormMode.OFF) {
- pi = new NormalizingPathIterator(pi, normalize);
- }
- }
-
- // by now, at least one of outat and strokerat will be null. Unless at is not
- // a constant multiple of an orthogonal transformation, they will both be
- // null. In other cases, outat == at if normalization is off, and if
- // normalization is on, strokerat == at.
- pc2d = TransformingPathConsumer2D.transformConsumer(pc2d, outat);
- pc2d = TransformingPathConsumer2D.deltaTransformConsumer(pc2d, strokerat);
- pc2d = new Stroker(pc2d, width, caps, join, miterlimit);
- if (dashes != null) {
- pc2d = new Dasher(pc2d, dashes, dashphase);
- }
- pc2d = TransformingPathConsumer2D.inverseDeltaTransformConsumer(pc2d, strokerat);
- pathTo(pi, pc2d);
- }
-
- private static boolean nearZero(double num, int nulps) {
- return Math.abs(num) < nulps * Math.ulp(num);
- }
-
- private static class NormalizingPathIterator implements PathIterator {
-
- private final PathIterator src;
-
- // the adjustment applied to the current position.
- private float curx_adjust, cury_adjust;
- // the adjustment applied to the last moveTo position.
- private float movx_adjust, movy_adjust;
-
- // constants used in normalization computations
- private final float lval, rval;
-
- NormalizingPathIterator(PathIterator src, NormMode mode) {
- this.src = src;
- switch (mode) {
- case ON_NO_AA:
- // round to nearest (0.25, 0.25) pixel
- lval = rval = 0.25f;
- break;
- case ON_WITH_AA:
- // round to nearest pixel center
- lval = 0f;
- rval = 0.5f;
- break;
- case OFF:
- throw new InternalError("A NormalizingPathIterator should " +
- "not be created if no normalization is being done");
- default:
- throw new InternalError("Unrecognized normalization mode");
- }
- }
-
- public int currentSegment(float[] coords) {
- int type = src.currentSegment(coords);
-
- int lastCoord;
- switch(type) {
- case PathIterator.SEG_CUBICTO:
- lastCoord = 4;
- break;
- case PathIterator.SEG_QUADTO:
- lastCoord = 2;
- break;
- case PathIterator.SEG_LINETO:
- case PathIterator.SEG_MOVETO:
- lastCoord = 0;
- break;
- case PathIterator.SEG_CLOSE:
- // we don't want to deal with this case later. We just exit now
- curx_adjust = movx_adjust;
- cury_adjust = movy_adjust;
- return type;
- default:
- throw new InternalError("Unrecognized curve type");
- }
-
- // normalize endpoint
- float x_adjust = (float)Math.floor(coords[lastCoord] + lval) +
- rval - coords[lastCoord];
- float y_adjust = (float)Math.floor(coords[lastCoord+1] + lval) +
- rval - coords[lastCoord + 1];
-
- coords[lastCoord ] += x_adjust;
- coords[lastCoord + 1] += y_adjust;
-
- // now that the end points are done, normalize the control points
- switch(type) {
- case PathIterator.SEG_CUBICTO:
- coords[0] += curx_adjust;
- coords[1] += cury_adjust;
- coords[2] += x_adjust;
- coords[3] += y_adjust;
- break;
- case PathIterator.SEG_QUADTO:
- coords[0] += (curx_adjust + x_adjust) / 2;
- coords[1] += (cury_adjust + y_adjust) / 2;
- break;
- case PathIterator.SEG_LINETO:
- break;
- case PathIterator.SEG_MOVETO:
- movx_adjust = x_adjust;
- movy_adjust = y_adjust;
- break;
- case PathIterator.SEG_CLOSE:
- throw new InternalError("This should be handled earlier.");
- }
- curx_adjust = x_adjust;
- cury_adjust = y_adjust;
- return type;
- }
-
- public int currentSegment(double[] coords) {
- float[] tmp = new float[6];
- int type = this.currentSegment(tmp);
- for (int i = 0; i < 6; i++) {
- coords[i] = tmp[i];
- }
- return type;
- }
-
- public int getWindingRule() {
- return src.getWindingRule();
- }
-
- public boolean isDone() {
- return src.isDone();
- }
-
- public void next() {
- src.next();
- }
- }
-
- static void pathTo(PathIterator pi, PathConsumer2D pc2d) {
- RenderingEngine.feedConsumer(pi, pc2d);
- pc2d.pathDone();
- }
-
- /**
- * Construct an antialiased tile generator for the given shape with
- * the given rendering attributes and store the bounds of the tile
- * iteration in the bbox parameter.
- * The {@code at} parameter specifies a transform that should affect
- * both the shape and the {@code BasicStroke} attributes.
- * The {@code clip} parameter specifies the current clip in effect
- * in device coordinates and can be used to prune the data for the
- * operation, but the renderer is not required to perform any
- * clipping.
- * If the {@code BasicStroke} parameter is null then the shape
- * should be filled as is, otherwise the attributes of the
- * {@code BasicStroke} should be used to specify a draw operation.
- * The {@code thin} parameter indicates whether or not the
- * transformed {@code BasicStroke} represents coordinates smaller
- * than the minimum resolution of the antialiasing rasterizer as
- * specified by the {@code getMinimumAAPenWidth()} method.
- * <p>
- * Upon returning, this method will fill the {@code bbox} parameter
- * with 4 values indicating the bounds of the iteration of the
- * tile generator.
- * The iteration order of the tiles will be as specified by the
- * pseudo-code:
- * <pre>
- * for (y = bbox[1]; y < bbox[3]; y += tileheight) {
- * for (x = bbox[0]; x < bbox[2]; x += tilewidth) {
- * }
- * }
- * </pre>
- * If there is no output to be rendered, this method may return
- * null.
- *
- * @param s the shape to be rendered (fill or draw)
- * @param at the transform to be applied to the shape and the
- * stroke attributes
- * @param clip the current clip in effect in device coordinates
- * @param bs if non-null, a {@code BasicStroke} whose attributes
- * should be applied to this operation
- * @param thin true if the transformed stroke attributes are smaller
- * than the minimum dropout pen width
- * @param normalize true if the {@code VALUE_STROKE_NORMALIZE}
- * {@code RenderingHint} is in effect
- * @param bbox returns the bounds of the iteration
- * @return the {@code AATileGenerator} instance to be consulted
- * for tile coverages, or null if there is no output to render
- * @since 1.7
- */
- public AATileGenerator getAATileGenerator(Shape s,
- AffineTransform at,
- Region clip,
- BasicStroke bs,
- boolean thin,
- boolean normalize,
- int bbox[])
- {
- Renderer r;
- NormMode norm = (normalize) ? NormMode.ON_WITH_AA : NormMode.OFF;
- if (bs == null) {
- PathIterator pi;
- if (normalize) {
- pi = new NormalizingPathIterator(s.getPathIterator(at), norm);
- } else {
- pi = s.getPathIterator(at);
- }
- r = new Renderer(3, 3,
- clip.getLoX(), clip.getLoY(),
- clip.getWidth(), clip.getHeight(),
- pi.getWindingRule());
- pathTo(pi, r);
- } else {
- r = new Renderer(3, 3,
- clip.getLoX(), clip.getLoY(),
- clip.getWidth(), clip.getHeight(),
- PathIterator.WIND_NON_ZERO);
- strokeTo(s, at, bs, thin, norm, true, r);
- }
- r.endRendering();
- PiscesTileGenerator ptg = new PiscesTileGenerator(r, r.MAX_AA_ALPHA);
- ptg.getBbox(bbox);
- return ptg;
- }
-
- public AATileGenerator getAATileGenerator(double x, double y,
- double dx1, double dy1,
- double dx2, double dy2,
- double lw1, double lw2,
- Region clip,
- int bbox[])
- {
- // REMIND: Deal with large coordinates!
- double ldx1, ldy1, ldx2, ldy2;
- boolean innerpgram = (lw1 > 0 && lw2 > 0);
-
- if (innerpgram) {
- ldx1 = dx1 * lw1;
- ldy1 = dy1 * lw1;
- ldx2 = dx2 * lw2;
- ldy2 = dy2 * lw2;
- x -= (ldx1 + ldx2) / 2.0;
- y -= (ldy1 + ldy2) / 2.0;
- dx1 += ldx1;
- dy1 += ldy1;
- dx2 += ldx2;
- dy2 += ldy2;
- if (lw1 > 1 && lw2 > 1) {
- // Inner parallelogram was entirely consumed by stroke...
- innerpgram = false;
- }
- } else {
- ldx1 = ldy1 = ldx2 = ldy2 = 0;
- }
-
- Renderer r = new Renderer(3, 3,
- clip.getLoX(), clip.getLoY(),
- clip.getWidth(), clip.getHeight(),
- PathIterator.WIND_EVEN_ODD);
-
- r.moveTo((float) x, (float) y);
- r.lineTo((float) (x+dx1), (float) (y+dy1));
- r.lineTo((float) (x+dx1+dx2), (float) (y+dy1+dy2));
- r.lineTo((float) (x+dx2), (float) (y+dy2));
- r.closePath();
-
- if (innerpgram) {
- x += ldx1 + ldx2;
- y += ldy1 + ldy2;
- dx1 -= 2.0 * ldx1;
- dy1 -= 2.0 * ldy1;
- dx2 -= 2.0 * ldx2;
- dy2 -= 2.0 * ldy2;
- r.moveTo((float) x, (float) y);
- r.lineTo((float) (x+dx1), (float) (y+dy1));
- r.lineTo((float) (x+dx1+dx2), (float) (y+dy1+dy2));
- r.lineTo((float) (x+dx2), (float) (y+dy2));
- r.closePath();
- }
-
- r.pathDone();
-
- r.endRendering();
- PiscesTileGenerator ptg = new PiscesTileGenerator(r, r.MAX_AA_ALPHA);
- ptg.getBbox(bbox);
- return ptg;
- }
-
- /**
- * Returns the minimum pen width that the antialiasing rasterizer
- * can represent without dropouts occurring.
- * @since 1.7
- */
- public float getMinimumAAPenSize() {
- return 0.5f;
- }
-
- static {
- if (PathIterator.WIND_NON_ZERO != Renderer.WIND_NON_ZERO ||
- PathIterator.WIND_EVEN_ODD != Renderer.WIND_EVEN_ODD ||
- BasicStroke.JOIN_MITER != Stroker.JOIN_MITER ||
- BasicStroke.JOIN_ROUND != Stroker.JOIN_ROUND ||
- BasicStroke.JOIN_BEVEL != Stroker.JOIN_BEVEL ||
- BasicStroke.CAP_BUTT != Stroker.CAP_BUTT ||
- BasicStroke.CAP_ROUND != Stroker.CAP_ROUND ||
- BasicStroke.CAP_SQUARE != Stroker.CAP_SQUARE)
- {
- throw new InternalError("mismatched renderer constants");
- }
- }
-}
-