public TrapezoidList tesselateStroke(
Shape s,
BasicStroke bs,
boolean thin,
boolean adjust,
boolean antialias,
AffineTransform at,
Region clip) {
float lw;
if (thin) {
if (antialias) {
lw = 0.5f;
} else {
lw = 1.0f;
}
} else {
lw = bs.getLineWidth();
}
convertPathData(s, at);
double[] dashArray = floatToDoubleArray(bs.getDashArray());
xTrapArray[0] = 0;
xTrapArray =
tesselateStrokeNative(
points.getArray(),
ops.getArray(),
points.getSize(),
ops.getSize(),
xTrapArray,
xTrapArray.length,
lw,
bs.getEndCap(),
bs.getLineJoin(),
bs.getMiterLimit(),
dashArray,
dashArray.length,
bs.getDashPhase(),
1,
0,
0,
0,
1,
0,
clip.getLoX(),
clip.getLoY(),
clip.getHiX(),
clip.getHiY());
return new TrapezoidList(xTrapArray);
}
public TrapezoidList tesselateFill(Shape s, AffineTransform at, Region clip) {
int windingRule = convertPathData(s, at);
xTrapArray[0] = 0;
xTrapArray =
tesselateFillNative(
points.getArray(),
ops.getArray(),
points.getSize(),
ops.getSize(),
xTrapArray,
xTrapArray.length,
getCairoWindingRule(windingRule),
clip.getLoX(),
clip.getLoY(),
clip.getHiX(),
clip.getHiY());
return new TrapezoidList(xTrapArray);
}
public void clear() {
points.clear();
ops.clear();
xTrapArray[0] = 0;
}
protected int convertPathData(Shape s, AffineTransform at) {
PathIterator pi = s.getPathIterator(at);
double[] coords = new double[6];
double currX = 0;
double currY = 0;
while (!pi.isDone()) {
int curOp = pi.currentSegment(coords);
int pointIndex;
switch (curOp) {
case PathIterator.SEG_MOVETO:
ops.addByte(CAIRO_PATH_OP_MOVE_TO);
pointIndex = points.getNextIndex();
points.setX(pointIndex, DoubleToCairoFixed(coords[0]));
points.setY(pointIndex, DoubleToCairoFixed(coords[1]));
currX = coords[0];
currY = coords[1];
break;
case PathIterator.SEG_LINETO:
ops.addByte(CAIRO_PATH_OP_LINE_TO);
pointIndex = points.getNextIndex();
points.setX(pointIndex, DoubleToCairoFixed(coords[0]));
points.setY(pointIndex, DoubleToCairoFixed(coords[1]));
currX = coords[0];
currY = coords[1];
break;
/** q0 = p0 q1 = (p0+2*p1)/3 q2 = (p2+2*p1)/3 q3 = p2 */
case PathIterator.SEG_QUADTO:
double x1 = coords[0];
double y1 = coords[1];
double x2, y2;
double x3 = coords[2];
double y3 = coords[3];
x2 = x1 + (x3 - x1) / 3;
y2 = y1 + (y3 - y1) / 3;
x1 = currX + 2 * (x1 - currX) / 3;
y1 = currY + 2 * (y1 - currY) / 3;
ops.addByte(CAIRO_PATH_OP_CURVE_TO);
pointIndex = points.getNextIndex();
points.setX(pointIndex, DoubleToCairoFixed(x1));
points.setY(pointIndex, DoubleToCairoFixed(y1));
pointIndex = points.getNextIndex();
points.setX(pointIndex, DoubleToCairoFixed(x2));
points.setY(pointIndex, DoubleToCairoFixed(y2));
pointIndex = points.getNextIndex();
points.setX(pointIndex, DoubleToCairoFixed(x3));
points.setY(pointIndex, DoubleToCairoFixed(y3));
currX = x3;
currY = y3;
break;
case PathIterator.SEG_CUBICTO:
ops.addByte(CAIRO_PATH_OP_CURVE_TO);
pointIndex = points.getNextIndex();
points.setX(pointIndex, DoubleToCairoFixed(coords[0]));
points.setY(pointIndex, DoubleToCairoFixed(coords[1]));
pointIndex = points.getNextIndex();
points.setX(pointIndex, DoubleToCairoFixed(coords[2]));
points.setY(pointIndex, DoubleToCairoFixed(coords[3]));
pointIndex = points.getNextIndex();
points.setX(pointIndex, DoubleToCairoFixed(coords[4]));
points.setY(pointIndex, DoubleToCairoFixed(coords[5]));
currX = coords[4];
currY = coords[5];
break;
case PathIterator.SEG_CLOSE:
ops.addByte(CAIRO_PATH_OP_CLOSE_PATH);
break;
}
pi.next();
}
return pi.getWindingRule();
}
