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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "PathOpsTestCommon.h"
#include "SkPathOpsBounds.h"
#include "SkPathOpsCubic.h"
#include "SkPathOpsLine.h"
#include "SkPathOpsQuad.h"
#include "SkPathOpsTriangle.h"
void CubicToQuads(const SkDCubic& cubic, double precision, SkTArray<SkDQuad, true>& quads) {
SkTArray<double, true> ts;
cubic.toQuadraticTs(precision, &ts);
if (ts.count() <= 0) {
SkDQuad quad = cubic.toQuad();
quads.push_back(quad);
return;
}
double tStart = 0;
for (int i1 = 0; i1 <= ts.count(); ++i1) {
const double tEnd = i1 < ts.count() ? ts[i1] : 1;
SkDCubic part = cubic.subDivide(tStart, tEnd);
SkDQuad quad = part.toQuad();
quads.push_back(quad);
tStart = tEnd;
}
}
void CubicPathToQuads(const SkPath& cubicPath, SkPath* quadPath) {
quadPath->reset();
SkDCubic cubic;
SkTArray<SkDQuad, true> quads;
SkPath::RawIter iter(cubicPath);
uint8_t verb;
SkPoint pts[4];
while ((verb = iter.next(pts)) != SkPath::kDone_Verb) {
switch (verb) {
case SkPath::kMove_Verb:
quadPath->moveTo(pts[0].fX, pts[0].fY);
continue;
case SkPath::kLine_Verb:
quadPath->lineTo(pts[1].fX, pts[1].fY);
break;
case SkPath::kQuad_Verb:
quadPath->quadTo(pts[1].fX, pts[1].fY, pts[2].fX, pts[2].fY);
break;
case SkPath::kCubic_Verb:
quads.reset();
cubic.set(pts);
CubicToQuads(cubic, cubic.calcPrecision(), quads);
for (int index = 0; index < quads.count(); ++index) {
SkPoint qPts[2] = {
quads[index][1].asSkPoint(),
quads[index][2].asSkPoint()
};
quadPath->quadTo(qPts[0].fX, qPts[0].fY, qPts[1].fX, qPts[1].fY);
}
break;
case SkPath::kClose_Verb:
quadPath->close();
break;
default:
SkDEBUGFAIL("bad verb");
return;
}
}
}
void CubicPathToSimple(const SkPath& cubicPath, SkPath* simplePath) {
simplePath->reset();
SkDCubic cubic;
SkPath::RawIter iter(cubicPath);
uint8_t verb;
SkPoint pts[4];
while ((verb = iter.next(pts)) != SkPath::kDone_Verb) {
switch (verb) {
case SkPath::kMove_Verb:
simplePath->moveTo(pts[0].fX, pts[0].fY);
continue;
case SkPath::kLine_Verb:
simplePath->lineTo(pts[1].fX, pts[1].fY);
break;
case SkPath::kQuad_Verb:
simplePath->quadTo(pts[1].fX, pts[1].fY, pts[2].fX, pts[2].fY);
break;
case SkPath::kCubic_Verb: {
cubic.set(pts);
double tInflects[2];
int inflections = cubic.findInflections(tInflects);
if (inflections > 1 && tInflects[0] > tInflects[1]) {
SkTSwap(tInflects[0], tInflects[1]);
}
double lo = 0;
for (int index = 0; index <= inflections; ++index) {
double hi = index < inflections ? tInflects[index] : 1;
SkDCubic part = cubic.subDivide(lo, hi);
SkPoint cPts[3];
cPts[0] = part[1].asSkPoint();
cPts[1] = part[2].asSkPoint();
cPts[2] = part[3].asSkPoint();
simplePath->cubicTo(cPts[0].fX, cPts[0].fY, cPts[1].fX, cPts[1].fY,
cPts[2].fX, cPts[2].fY);
lo = hi;
}
break;
}
case SkPath::kClose_Verb:
simplePath->close();
break;
default:
SkDEBUGFAIL("bad verb");
return;
}
}
}
static bool SkDoubleIsNaN(double x) {
return x != x;
}
bool ValidBounds(const SkPathOpsBounds& bounds) {
if (SkScalarIsNaN(bounds.fLeft)) {
return false;
}
if (SkScalarIsNaN(bounds.fTop)) {
return false;
}
if (SkScalarIsNaN(bounds.fRight)) {
return false;
}
return !SkScalarIsNaN(bounds.fBottom);
}
bool ValidCubic(const SkDCubic& cubic) {
for (int index = 0; index < 4; ++index) {
if (!ValidPoint(cubic[index])) {
return false;
}
}
return true;
}
bool ValidLine(const SkDLine& line) {
for (int index = 0; index < 2; ++index) {
if (!ValidPoint(line[index])) {
return false;
}
}
return true;
}
bool ValidPoint(const SkDPoint& pt) {
if (SkDoubleIsNaN(pt.fX)) {
return false;
}
return !SkDoubleIsNaN(pt.fY);
}
bool ValidPoints(const SkPoint* pts, int count) {
for (int index = 0; index < count; ++index) {
if (SkScalarIsNaN(pts[index].fX)) {
return false;
}
if (SkScalarIsNaN(pts[index].fY)) {
return false;
}
}
return true;
}
bool ValidQuad(const SkDQuad& quad) {
for (int index = 0; index < 3; ++index) {
if (!ValidPoint(quad[index])) {
return false;
}
}
return true;
}
bool ValidTriangle(const SkDTriangle& triangle) {
for (int index = 0; index < 3; ++index) {
if (!ValidPoint(triangle.fPts[index])) {
return false;
}
}
return true;
}
bool ValidVector(const SkDVector& v) {
if (SkDoubleIsNaN(v.fX)) {
return false;
}
return !SkDoubleIsNaN(v.fY);
}
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