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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#ifndef MOZILLA_GFX_PATHRECORDING_H_
#define MOZILLA_GFX_PATHRECORDING_H_
#include "2D.h"
#include <vector>
#include <ostream>
#include "PathHelpers.h"
#include "RecordingTypes.h"
namespace mozilla {
namespace gfx {
struct Circle {
Point origin;
float radius;
bool closed = false;
};
struct Line {
Point origin;
Point destination;
};
class PathOps {
public:
PathOps() = default;
template <class S>
explicit PathOps(S& aStream);
PathOps(const PathOps& aOther) = default;
PathOps& operator=(const PathOps&) = delete; // assign using std::move()!
PathOps(PathOps&& aOther) = default;
PathOps& operator=(PathOps&& aOther) = default;
template <class S>
void Record(S& aStream) const;
bool StreamToSink(PathSink& aPathSink) const;
bool CheckedStreamToSink(PathSink& aPathSink) const;
PathOps TransformedCopy(const Matrix& aTransform) const;
size_t NumberOfOps() const;
void MoveTo(const Point& aPoint) { AppendPathOp(OpType::OP_MOVETO, aPoint); }
void LineTo(const Point& aPoint) { AppendPathOp(OpType::OP_LINETO, aPoint); }
void BezierTo(const Point& aCP1, const Point& aCP2, const Point& aCP3) {
AppendPathOp(OpType::OP_BEZIERTO, ThreePoints{aCP1, aCP2, aCP3});
}
void QuadraticBezierTo(const Point& aCP1, const Point& aCP2) {
AppendPathOp(OpType::OP_QUADRATICBEZIERTO, TwoPoints{aCP1, aCP2});
}
void Arc(const Point& aOrigin, float aRadius, float aStartAngle,
float aEndAngle, bool aAntiClockwise) {
AppendPathOp(OpType::OP_ARC, ArcParams{aOrigin, aRadius, aStartAngle,
aEndAngle, aAntiClockwise});
}
void Close() {
size_t oldSize = mPathData.size();
mPathData.resize(oldSize + sizeof(OpType));
*reinterpret_cast<OpType*>(mPathData.data() + oldSize) = OpType::OP_CLOSE;
}
Maybe<Circle> AsCircle() const;
Maybe<Line> AsLine() const;
bool IsActive() const { return !mPathData.empty(); }
bool IsEmpty() const;
private:
enum class OpType : uint32_t {
OP_MOVETO = 0,
OP_LINETO,
OP_BEZIERTO,
OP_QUADRATICBEZIERTO,
OP_ARC,
OP_CLOSE,
OP_INVALID
};
template <typename T>
void AppendPathOp(const OpType& aOpType, const T& aOpParams) {
size_t oldSize = mPathData.size();
mPathData.resize(oldSize + sizeof(OpType) + sizeof(T));
memcpy(mPathData.data() + oldSize, &aOpType, sizeof(OpType));
oldSize += sizeof(OpType);
memcpy(mPathData.data() + oldSize, &aOpParams, sizeof(T));
}
struct TwoPoints {
Point p1;
Point p2;
};
struct ThreePoints {
Point p1;
Point p2;
Point p3;
};
struct ArcParams {
Point origin;
float radius;
float startAngle;
float endAngle;
bool antiClockwise;
};
std::vector<uint8_t> mPathData;
};
template <class S>
PathOps::PathOps(S& aStream) {
ReadVector(aStream, mPathData);
}
template <class S>
inline void PathOps::Record(S& aStream) const {
WriteVector(aStream, mPathData);
}
class PathRecording;
class DrawEventRecorderPrivate;
class PathBuilderRecording final : public PathBuilder {
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(PathBuilderRecording, override)
PathBuilderRecording(BackendType aBackend, FillRule aFillRule)
: mBackendType(aBackend), mFillRule(aFillRule) {}
PathBuilderRecording(BackendType aBackend, PathOps&& aPathOps,
FillRule aFillRule)
: mBackendType(aBackend),
mFillRule(aFillRule),
mPathOps(std::move(aPathOps)) {}
/* Move the current point in the path, any figure currently being drawn will
* be considered closed during fill operations, however when stroking the
* closing line segment will not be drawn.
*/
void MoveTo(const Point& aPoint) final;
/* Add a linesegment to the current figure */
void LineTo(const Point& aPoint) final;
/* Add a cubic bezier curve to the current figure */
void BezierTo(const Point& aCP1, const Point& aCP2, const Point& aCP3) final;
/* Add a quadratic bezier curve to the current figure */
void QuadraticBezierTo(const Point& aCP1, const Point& aCP2) final;
/* Close the current figure, this will essentially generate a line segment
* from the current point to the starting point for the current figure
*/
void Close() final;
/* Add an arc to the current figure */
void Arc(const Point& aOrigin, float aRadius, float aStartAngle,
float aEndAngle, bool aAntiClockwise) final;
already_AddRefed<Path> Finish() final;
BackendType GetBackendType() const final { return BackendType::RECORDING; }
bool IsActive() const final { return mPathOps.IsActive(); }
private:
BackendType mBackendType;
FillRule mFillRule;
PathOps mPathOps;
};
class PathRecording final : public Path {
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(PathRecording, override)
PathRecording(BackendType aBackend, PathOps&& aOps, FillRule aFillRule,
const Point& aCurrentPoint, const Point& aBeginPoint);
~PathRecording();
BackendType GetBackendType() const final { return BackendType::RECORDING; }
already_AddRefed<PathBuilder> CopyToBuilder(FillRule aFillRule) const final;
already_AddRefed<PathBuilder> TransformedCopyToBuilder(
const Matrix& aTransform, FillRule aFillRule) const final;
bool ContainsPoint(const Point& aPoint,
const Matrix& aTransform) const final {
EnsurePath();
return mPath->ContainsPoint(aPoint, aTransform);
}
bool StrokeContainsPoint(const StrokeOptions& aStrokeOptions,
const Point& aPoint,
const Matrix& aTransform) const final {
EnsurePath();
return mPath->StrokeContainsPoint(aStrokeOptions, aPoint, aTransform);
}
Rect GetBounds(const Matrix& aTransform = Matrix()) const final {
EnsurePath();
return mPath->GetBounds(aTransform);
}
Rect GetStrokedBounds(const StrokeOptions& aStrokeOptions,
const Matrix& aTransform = Matrix()) const final {
EnsurePath();
return mPath->GetStrokedBounds(aStrokeOptions, aTransform);
}
Maybe<Rect> AsRect() const final {
EnsurePath();
return mPath->AsRect();
}
Maybe<Circle> AsCircle() const { return mPathOps.AsCircle(); }
Maybe<Line> AsLine() const { return mPathOps.AsLine(); }
void StreamToSink(PathSink* aSink) const final {
mPathOps.StreamToSink(*aSink);
}
FillRule GetFillRule() const final { return mFillRule; }
bool IsEmpty() const final { return mPathOps.IsEmpty(); }
private:
friend class DrawTargetWrapAndRecord;
friend class DrawTargetRecording;
friend class RecordedPathCreation;
void EnsurePath() const;
BackendType mBackendType;
mutable RefPtr<Path> mPath;
PathOps mPathOps;
FillRule mFillRule;
Point mCurrentPoint;
Point mBeginPoint;
// Event recorders that have this path in their event stream.
std::vector<RefPtr<DrawEventRecorderPrivate>> mStoredRecorders;
};
} // namespace gfx
} // namespace mozilla
#endif /* MOZILLA_GFX_PATHRECORDING_H_ */