/*
* Copyright 2008 Sun Microsystems, Inc. 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. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package ae.sun.java2d.pipe;
import ae.java.awt.Shape;
import ae.java.awt.BasicStroke;
import ae.java.awt.geom.Line2D;
import ae.java.awt.geom.Rectangle2D;
import ae.java.awt.geom.AffineTransform;
import ae.sun.awt.SunHints;
import ae.sun.java2d.SunGraphics2D;
/**
* This class converts calls to the basic pixel rendering methods
* into calls to the methods on a ParallelogramPipe.
* Most calls are transformed into calls to the fill(Shape) method
* by the parent PixelToShapeConverter class, but some calls are
* transformed into calls to fill/drawParallelogram().
*/
public class PixelToParallelogramConverter extends PixelToShapeConverter
implements ShapeDrawPipe
{
ParallelogramPipe outrenderer;
double minPenSize;
double normPosition;
double normRoundingBias;
boolean adjustfill;
/**
* @param shapepipe pipeline to forward shape calls to
* @param pgrampipe pipeline to forward parallelogram calls to
* (and drawLine calls if possible)
* @param minPenSize minimum pen size for dropout control
* @param normPosition sub-pixel location to normalize endpoints
* for STROKE_NORMALIZE cases
* @param adjustFill boolean to control whethere normalization
* constants are also applied to fill operations
* (normally true for non-AA, false for AA)
*/
public PixelToParallelogramConverter(ShapeDrawPipe shapepipe,
ParallelogramPipe pgrampipe,
double minPenSize,
double normPosition,
boolean adjustfill)
{
super(shapepipe);
outrenderer = pgrampipe;
this.minPenSize = minPenSize;
this.normPosition = normPosition;
this.normRoundingBias = 0.5 - normPosition;
this.adjustfill = adjustfill;
}
public void drawLine(SunGraphics2D sg2d,
int x1, int y1, int x2, int y2)
{
if (!drawGeneralLine(sg2d, x1, y1, x2, y2)) {
super.drawLine(sg2d, x1, y1, x2, y2);
}
}
public void drawRect(SunGraphics2D sg2d,
int x, int y, int w, int h)
{
if (w >= 0 && h >= 0) {
if (sg2d.strokeState < SunGraphics2D.STROKE_CUSTOM) {
BasicStroke bs = ((BasicStroke) sg2d.stroke);
if (w > 0 && h > 0) {
if (bs.getLineJoin() == BasicStroke.JOIN_MITER &&
bs.getDashArray() == null)
{
double lw = bs.getLineWidth();
drawRectangle(sg2d, x, y, w, h, lw);
return;
}
} else {
// Note: This calls the integer version which
// will verify that the local drawLine optimizations
// work and call super.drawLine(), if not.
drawLine(sg2d, x, y, x+w, y+h);
return;
}
}
super.drawRect(sg2d, x, y, w, h);
}
}
public void fillRect(SunGraphics2D sg2d,
int x, int y, int w, int h)
{
if (w > 0 && h > 0) {
fillRectangle(sg2d, x, y, w, h);
}
}
public void draw(SunGraphics2D sg2d, Shape s) {
if (sg2d.strokeState < SunGraphics2D.STROKE_CUSTOM) {
BasicStroke bs = ((BasicStroke) sg2d.stroke);
if (s instanceof Rectangle2D) {
if (bs.getLineJoin() == BasicStroke.JOIN_MITER &&
bs.getDashArray() == null)
{
Rectangle2D r2d = (Rectangle2D) s;
double w = r2d.getWidth();
double h = r2d.getHeight();
double x = r2d.getX();
double y = r2d.getY();
if (w >= 0 && h >= 0) {
double lw = bs.getLineWidth();
drawRectangle(sg2d, x, y, w, h, lw);
}
return;
}
} else if (s instanceof Line2D) {
Line2D l2d = (Line2D) s;
if (drawGeneralLine(sg2d,
l2d.getX1(), l2d.getY1(),
l2d.getX2(), l2d.getY2()))
{
return;
}
}
}
outpipe.draw(sg2d, s);
}
public void fill(SunGraphics2D sg2d, Shape s) {
if (s instanceof Rectangle2D) {
Rectangle2D r2d = (Rectangle2D) s;
double w = r2d.getWidth();
double h = r2d.getHeight();
if (w > 0 && h > 0) {
double x = r2d.getX();
double y = r2d.getY();
fillRectangle(sg2d, x, y, w, h);
}
return;
}
outpipe.fill(sg2d, s);
}
static double len(double x, double y) {
return ((x == 0) ? Math.abs(y)
: ((y == 0) ? Math.abs(x)
: Math.sqrt(x * x + y * y)));
}
double normalize(double v) {
return Math.floor(v + normRoundingBias) + normPosition;
}
public boolean drawGeneralLine(SunGraphics2D sg2d,
double x1, double y1,
double x2, double y2)
{
if (sg2d.strokeState == SunGraphics2D.STROKE_CUSTOM ||
sg2d.strokeState == SunGraphics2D.STROKE_THINDASHED)
{
return false;
}
BasicStroke bs = (BasicStroke) sg2d.stroke;
int cap = bs.getEndCap();
if (cap == BasicStroke.CAP_ROUND || bs.getDashArray() != null) {
// TODO: we could construct the GeneralPath directly
// for CAP_ROUND and save a lot of processing in that case...
// And again, we would need to deal with dropout control...
return false;
}
double lw = bs.getLineWidth();
// Save the original dx, dy in case we need it to transform
// the linewidth as a perpendicular vector below
double dx = x2 - x1;
double dy = y2 - y1;
switch (sg2d.transformState) {
case SunGraphics2D.TRANSFORM_GENERIC:
case SunGraphics2D.TRANSFORM_TRANSLATESCALE:
{
double coords[] = {x1, y1, x2, y2};
sg2d.transform.transform(coords, 0, coords, 0, 2);
x1 = coords[0];
y1 = coords[1];
x2 = coords[2];
y2 = coords[3];
}
break;
case SunGraphics2D.TRANSFORM_ANY_TRANSLATE:
case SunGraphics2D.TRANSFORM_INT_TRANSLATE:
{
double tx = sg2d.transform.getTranslateX();
double ty = sg2d.transform.getTranslateY();
x1 += tx;
y1 += ty;
x2 += tx;
y2 += ty;
}
break;
case SunGraphics2D.TRANSFORM_ISIDENT:
break;
default:
throw new InternalError("unknown TRANSFORM state...");
}
if (sg2d.strokeHint != SunHints.INTVAL_STROKE_PURE) {
if (sg2d.strokeState == SunGraphics2D.STROKE_THIN &&
outrenderer instanceof PixelDrawPipe)
{
// PixelDrawPipes will add sg2d.transXY so we need to factor
// that out...
int ix1 = (int) Math.floor(x1 - sg2d.transX);
int iy1 = (int) Math.floor(y1 - sg2d.transY);
int ix2 = (int) Math.floor(x2 - sg2d.transX);
int iy2 = (int) Math.floor(y2 - sg2d.transY);
((PixelDrawPipe)outrenderer).drawLine(sg2d, ix1, iy1, ix2, iy2);
return true;
}
x1 = normalize(x1);
y1 = normalize(y1);
x2 = normalize(x2);
y2 = normalize(y2);
}
if (sg2d.transformState >= SunGraphics2D.TRANSFORM_TRANSLATESCALE) {
// Transform the linewidth...
// calculate the scaling factor for a unit vector
// perpendicular to the original user space line.
double len = len(dx, dy);
if (len == 0) {
dx = len = 1;
// dy = 0; already
}
// delta transform the transposed (90 degree rotated) unit vector
double unitvector[] = {dy/len, -dx/len};
sg2d.transform.deltaTransform(unitvector, 0, unitvector, 0, 1);
lw *= len(unitvector[0], unitvector[1]);
}
lw = Math.max(lw, minPenSize);
dx = x2 - x1;
dy = y2 - y1;
double len = len(dx, dy);
double udx, udy;
if (len == 0) {
if (cap == BasicStroke.CAP_BUTT) {
return true;
}
udx = lw;
udy = 0;
} else {
udx = lw * dx / len;
udy = lw * dy / len;
}
double px = x1 + udy / 2.0;
double py = y1 - udx / 2.0;
if (cap == BasicStroke.CAP_SQUARE) {
px -= udx / 2.0;
py -= udy / 2.0;
dx += udx;
dy += udy;
}
outrenderer.fillParallelogram(sg2d, px, py, -udy, udx, dx, dy);
return true;
}
public void fillRectangle(SunGraphics2D sg2d,
double rx, double ry,
double rw, double rh)
{
double px, py;
double dx1, dy1, dx2, dy2;
AffineTransform txform = sg2d.transform;
dx1 = txform.getScaleX();
dy1 = txform.getShearY();
dx2 = txform.getShearX();
dy2 = txform.getScaleY();
px = rx * dx1 + ry * dx2 + txform.getTranslateX();
py = rx * dy1 + ry * dy2 + txform.getTranslateY();
dx1 *= rw;
dy1 *= rw;
dx2 *= rh;
dy2 *= rh;
if (adjustfill &&
sg2d.strokeState < SunGraphics2D.STROKE_CUSTOM &&
sg2d.strokeHint != SunHints.INTVAL_STROKE_PURE)
{
double newx = normalize(px);
double newy = normalize(py);
dx1 = normalize(px + dx1) - newx;
dy1 = normalize(py + dy1) - newy;
dx2 = normalize(px + dx2) - newx;
dy2 = normalize(py + dy2) - newy;
px = newx;
py = newy;
}
outrenderer.fillParallelogram(sg2d, px, py, dx1, dy1, dx2, dy2);
}
public void drawRectangle(SunGraphics2D sg2d,
double rx, double ry,
double rw, double rh,
double lw)
{
double px, py;
double dx1, dy1, dx2, dy2;
double lw1, lw2;
AffineTransform txform = sg2d.transform;
dx1 = txform.getScaleX();
dy1 = txform.getShearY();
dx2 = txform.getShearX();
dy2 = txform.getScaleY();
px = rx * dx1 + ry * dx2 + txform.getTranslateX();
py = rx * dy1 + ry * dy2 + txform.getTranslateY();
// lw along dx1,dy1 scale by transformed length of dx2,dy2 vectors
// and vice versa
lw1 = len(dx1, dy1) * lw;
lw2 = len(dx2, dy2) * lw;
dx1 *= rw;
dy1 *= rw;
dx2 *= rh;
dy2 *= rh;
if (sg2d.strokeState < SunGraphics2D.STROKE_CUSTOM &&
sg2d.strokeHint != SunHints.INTVAL_STROKE_PURE)
{
double newx = normalize(px);
double newy = normalize(py);
dx1 = normalize(px + dx1) - newx;
dy1 = normalize(py + dy1) - newy;
dx2 = normalize(px + dx2) - newx;
dy2 = normalize(py + dy2) - newy;
px = newx;
py = newy;
}
lw1 = Math.max(lw1, minPenSize);
lw2 = Math.max(lw2, minPenSize);
double len1 = len(dx1, dy1);
double len2 = len(dx2, dy2);
if (lw1 >= len1 || lw2 >= len2) {
// The line widths are large enough to consume the
// entire hole in the middle of the parallelogram
// so we can just fill the outer parallelogram.
fillOuterParallelogram(sg2d,
px, py, dx1, dy1, dx2, dy2,
len1, len2, lw1, lw2);
} else {
outrenderer.drawParallelogram(sg2d,
px, py, dx1, dy1, dx2, dy2,
lw1 / len1, lw2 / len2);
}
}
/**
* This utility function handles the case where a drawRectangle
* operation discovered that the interior hole in the rectangle
* or parallelogram has been completely filled in by the stroke
* width. It calculates the outer parallelogram of the stroke
* and issues a single fillParallelogram request to fill it.
*/
public void fillOuterParallelogram(SunGraphics2D sg2d,
double px, double py,
double dx1, double dy1,
double dx2, double dy2,
double len1, double len2,
double lw1, double lw2)
{
double udx1 = dx1 / len1;
double udy1 = dy1 / len1;
double udx2 = dx2 / len2;
double udy2 = dy2 / len2;
if (len1 == 0) {
// len1 is 0, replace udxy1 with perpendicular of udxy2
if (len2 == 0) {
// both are 0, use a unit Y vector for udxy2
udx2 = 0;
udy2 = 1;
}
udx1 = udy2;
udy1 = -udx2;
} else if (len2 == 0) {
// len2 is 0, replace udxy2 with perpendicular of udxy1
udx2 = udy1;
udy2 = -udx1;
}
udx1 *= lw1;
udy1 *= lw1;
udx2 *= lw2;
udy2 *= lw2;
px -= (udx1 + udx2) / 2;
py -= (udy1 + udy2) / 2;
dx1 += udx1;
dy1 += udy1;
dx2 += udx2;
dy2 += udy2;
outrenderer.fillParallelogram(sg2d, px, py, dx1, dy1, dx2, dy2);
}
}