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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkOpEdgeBuilder.h"
#include "SkPathOpsCommon.h"
bool TightBounds(const SkPath& path, SkRect* result) {
SkChunkAlloc allocator(4096); // FIXME: constant-ize, tune
SkOpContour contour;
SkOpContourHead* contourList = static_cast<SkOpContourHead*>(&contour);
SkOpGlobalState globalState(contourList, &allocator SkDEBUGPARAMS(false)
SkDEBUGPARAMS(nullptr));
// turn path into list of segments
SkScalar scaleFactor = ScaleFactor(path);
SkPath scaledPath;
const SkPath* workingPath;
if (scaleFactor > SK_Scalar1) {
ScalePath(path, 1.f / scaleFactor, &scaledPath);
workingPath = &scaledPath;
} else {
workingPath = &path;
}
SkOpEdgeBuilder builder(*workingPath, &contour, &globalState);
if (!builder.finish()) {
return false;
}
if (!SortContourList(&contourList, false, false)) {
result->setEmpty();
return true;
}
SkOpContour* current = contourList;
SkPathOpsBounds bounds = current->bounds();
while ((current = current->next())) {
bounds.add(current->bounds());
}
*result = bounds;
return true;
}
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