gecko-dev/gfx/2d/PathRecording.h

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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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MOZILLA_GFX_PATHRECORDING_H_
#define MOZILLA_GFX_PATHRECORDING_H_
#include "2D.h"
#include <vector>
#include <ostream>
#include "PathHelpers.h"
namespace mozilla {
namespace gfx {
struct PathOp {
enum OpType {
OP_MOVETO = 0,
OP_LINETO,
OP_BEZIERTO,
OP_QUADRATICBEZIERTO,
OP_CLOSE
};
OpType mType;
Point mP1;
Point mP2;
Point mP3;
};
const int32_t sPointCount[] = {1, 1, 3, 2, 0, 0};
class PathRecording;
class DrawEventRecorderPrivate;
class PathBuilderRecording : public PathBuilder {
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(PathBuilderRecording, override)
PathBuilderRecording(PathBuilder *aBuilder, FillRule aFillRule)
: mPathBuilder(aBuilder), mFillRule(aFillRule) {}
/* 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.
*/
virtual void MoveTo(const Point &aPoint) override;
/* Add a linesegment to the current figure */
virtual void LineTo(const Point &aPoint) override;
/* Add a cubic bezier curve to the current figure */
virtual void BezierTo(const Point &aCP1, const Point &aCP2,
const Point &aCP3) override;
/* Add a quadratic bezier curve to the current figure */
virtual void QuadraticBezierTo(const Point &aCP1, const Point &aCP2) override;
/* Close the current figure, this will essentially generate a line segment
* from the current point to the starting point for the current figure
*/
virtual void Close() override;
/* Add an arc to the current figure */
virtual void Arc(const Point &aOrigin, float aRadius, float aStartAngle,
float aEndAngle, bool aAntiClockwise) override {
ArcToBezier(this, aOrigin, Size(aRadius, aRadius), aStartAngle, aEndAngle,
aAntiClockwise);
}
/* Point the current subpath is at - or where the next subpath will start
* if there is no active subpath.
*/
virtual Point CurrentPoint() const override;
virtual already_AddRefed<Path> Finish() override;
virtual BackendType GetBackendType() const override {
return BackendType::RECORDING;
}
private:
friend class PathRecording;
RefPtr<PathBuilder> mPathBuilder;
FillRule mFillRule;
std::vector<PathOp> mPathOps;
};
class PathRecording : public Path {
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(PathRecording, override)
PathRecording(Path *aPath, const std::vector<PathOp> aOps, FillRule aFillRule)
: mPath(aPath), mPathOps(aOps), mFillRule(aFillRule) {}
~PathRecording();
virtual BackendType GetBackendType() const override {
return BackendType::RECORDING;
}
virtual already_AddRefed<PathBuilder> CopyToBuilder(
FillRule aFillRule) const override;
virtual already_AddRefed<PathBuilder> TransformedCopyToBuilder(
const Matrix &aTransform, FillRule aFillRule) const override;
virtual bool ContainsPoint(const Point &aPoint,
const Matrix &aTransform) const override {
return mPath->ContainsPoint(aPoint, aTransform);
}
virtual bool StrokeContainsPoint(const StrokeOptions &aStrokeOptions,
const Point &aPoint,
const Matrix &aTransform) const override {
return mPath->StrokeContainsPoint(aStrokeOptions, aPoint, aTransform);
}
virtual Rect GetBounds(const Matrix &aTransform = Matrix()) const override {
return mPath->GetBounds(aTransform);
}
virtual Rect GetStrokedBounds(
const StrokeOptions &aStrokeOptions,
const Matrix &aTransform = Matrix()) const override {
return mPath->GetStrokedBounds(aStrokeOptions, aTransform);
}
virtual void StreamToSink(PathSink *aSink) const override {
mPath->StreamToSink(aSink);
}
virtual FillRule GetFillRule() const override { return mFillRule; }
void StorePath(std::ostream &aStream) const;
static void ReadPathToBuilder(std::istream &aStream, PathBuilder *aBuilder);
private:
friend class DrawTargetWrapAndRecord;
friend class DrawTargetRecording;
friend class RecordedPathCreation;
RefPtr<Path> mPath;
std::vector<PathOp> mPathOps;
FillRule mFillRule;
// Event recorders that have this path in their event stream.
std::vector<RefPtr<DrawEventRecorderPrivate>> mStoredRecorders;
};
} // namespace gfx
} // namespace mozilla
#endif /* MOZILLA_GFX_PATHRECORDING_H_ */