63fd760a37
Also adds a presubmit to prevent adding trailing whitespace to source code in the future. Change-Id: I41a4df81487f6f00aa19b188f0cac6a3377efde6 Reviewed-on: https://skia-review.googlesource.com/57380 Reviewed-by: Ravi Mistry <rmistry@google.com> Reviewed-by: Mike Reed <reed@google.com> Commit-Queue: Ben Wagner <bungeman@google.com>
100 lines
3.3 KiB
C++
100 lines
3.3 KiB
C++
/*
|
|
* Copyright 2012 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
#ifndef SkPathOps_DEFINED
|
|
#define SkPathOps_DEFINED
|
|
|
|
#include "../private/SkTArray.h"
|
|
#include "../private/SkTDArray.h"
|
|
#include "SkPreConfig.h"
|
|
|
|
class SkPath;
|
|
struct SkRect;
|
|
|
|
|
|
// FIXME: move everything below into the SkPath class
|
|
/**
|
|
* The logical operations that can be performed when combining two paths.
|
|
*/
|
|
enum SkPathOp {
|
|
kDifference_SkPathOp, //!< subtract the op path from the first path
|
|
kIntersect_SkPathOp, //!< intersect the two paths
|
|
kUnion_SkPathOp, //!< union (inclusive-or) the two paths
|
|
kXOR_SkPathOp, //!< exclusive-or the two paths
|
|
kReverseDifference_SkPathOp, //!< subtract the first path from the op path
|
|
};
|
|
|
|
/** Set this path to the result of applying the Op to this path and the
|
|
specified path: this = (this op operand).
|
|
The resulting path will be constructed from non-overlapping contours.
|
|
The curve order is reduced where possible so that cubics may be turned
|
|
into quadratics, and quadratics maybe turned into lines.
|
|
|
|
Returns true if operation was able to produce a result;
|
|
otherwise, result is unmodified.
|
|
|
|
@param one The first operand (for difference, the minuend)
|
|
@param two The second operand (for difference, the subtrahend)
|
|
@param op The operator to apply.
|
|
@param result The product of the operands. The result may be one of the
|
|
inputs.
|
|
@return True if the operation succeeded.
|
|
*/
|
|
bool SK_API Op(const SkPath& one, const SkPath& two, SkPathOp op, SkPath* result);
|
|
|
|
/** Set this path to a set of non-overlapping contours that describe the
|
|
same area as the original path.
|
|
The curve order is reduced where possible so that cubics may
|
|
be turned into quadratics, and quadratics maybe turned into lines.
|
|
|
|
Returns true if operation was able to produce a result;
|
|
otherwise, result is unmodified.
|
|
|
|
@param path The path to simplify.
|
|
@param result The simplified path. The result may be the input.
|
|
@return True if simplification succeeded.
|
|
*/
|
|
bool SK_API Simplify(const SkPath& path, SkPath* result);
|
|
|
|
/** Set the resulting rectangle to the tight bounds of the path.
|
|
|
|
@param path The path measured.
|
|
@param result The tight bounds of the path.
|
|
@return True if the bounds could be computed.
|
|
*/
|
|
bool SK_API TightBounds(const SkPath& path, SkRect* result);
|
|
|
|
/** Perform a series of path operations, optimized for unioning many paths together.
|
|
*/
|
|
class SK_API SkOpBuilder {
|
|
public:
|
|
/** Add one or more paths and their operand. The builder is empty before the first
|
|
path is added, so the result of a single add is (emptyPath OP path).
|
|
|
|
@param path The second operand.
|
|
@param _operator The operator to apply to the existing and supplied paths.
|
|
*/
|
|
void add(const SkPath& path, SkPathOp _operator);
|
|
|
|
/** Computes the sum of all paths and operands, and resets the builder to its
|
|
initial state.
|
|
|
|
@param result The product of the operands.
|
|
@return True if the operation succeeded.
|
|
*/
|
|
bool resolve(SkPath* result);
|
|
|
|
private:
|
|
SkTArray<SkPath> fPathRefs;
|
|
SkTDArray<SkPathOp> fOps;
|
|
|
|
static bool FixWinding(SkPath* path);
|
|
static void ReversePath(SkPath* path);
|
|
void reset();
|
|
};
|
|
|
|
#endif
|