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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkRemote_DEFINED
#define SkRemote_DEFINED
#include "SkCanvas.h"
#include "SkPaint.h"
#include "SkRemote_protocol.h"
#include "SkTHash.h"
#include "SkTypes.h"
// TODO: document
namespace SkRemote {
// TODO: document
struct Misc {
SkColor fColor;
SkFilterQuality fFilterQuality;
bool fAntiAlias, fDither;
static Misc CreateFrom(const SkPaint&);
void applyTo(SkPaint*) const;
};
// TODO: document
struct Stroke {
SkScalar fWidth, fMiter;
SkPaint::Cap fCap;
SkPaint::Join fJoin;
static Stroke CreateFrom(const SkPaint&);
void applyTo(SkPaint*) const;
};
// TODO: document
struct Encoder {
virtual ~Encoder() {}
virtual void define(ID, const SkMatrix&) = 0;
virtual void define(ID, const Misc&) = 0;
virtual void define(ID, const SkPath&) = 0;
virtual void define(ID, const Stroke&) = 0;
virtual void undefine(ID) = 0;
virtual void save() = 0;
virtual void restore() = 0;
virtual void setMatrix(ID matrix) = 0;
virtual void clipPath(ID path, SkRegion::Op, bool aa) = 0;
virtual void fillPath(ID path, ID misc) = 0;
virtual void strokePath(ID path, ID misc, ID stroke) = 0;
};
struct Cache;
// TODO: document
class LookupScope {
public:
LookupScope(Cache* cache, Encoder* encoder) : fCache(cache), fEncoder(encoder) {}
~LookupScope() { for (ID id : fToUndefine) { fEncoder->undefine(id); } }
void undefineWhenDone(ID id) { fToUndefine.push_back(id); }
template <typename T>
ID lookup(const T&);
private:
Cache* fCache;
Encoder* fEncoder;
SkSTArray<4, ID> fToUndefine;
};
// TODO: document
struct Cache {
virtual ~Cache() {}
static Cache* CreateNeverCache();
static Cache* CreateAlwaysCache();
virtual bool lookup(const SkMatrix&, ID*, LookupScope*) = 0;
virtual bool lookup(const Misc&, ID*, LookupScope*) = 0;
virtual bool lookup(const SkPath&, ID*, LookupScope*) = 0;
virtual bool lookup(const Stroke&, ID*, LookupScope*) = 0;
virtual void cleanup(Encoder*) = 0;
};
// TODO: document
class Client final : public SkCanvas {
public:
Client(Cache*, Encoder*);
~Client();
private:
void willSave() override;
void didRestore() override;
void didConcat(const SkMatrix&) override;
void didSetMatrix(const SkMatrix&) override;
void onClipPath (const SkPath&, SkRegion::Op, ClipEdgeStyle) override;
void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) override;
void onClipRect (const SkRect&, SkRegion::Op, ClipEdgeStyle) override;
void onDrawOval(const SkRect&, const SkPaint&) override;
void onDrawPath(const SkPath&, const SkPaint&) override;
void onDrawRect(const SkRect&, const SkPaint&) override;
Cache* fCache;
Encoder* fEncoder;
};
// TODO: document
class Server final : public Encoder {
public:
explicit Server(SkCanvas*);
private:
void define(ID, const SkMatrix&) override;
void define(ID, const Misc&) override;
void define(ID, const SkPath&) override;
void define(ID, const Stroke&) override;
void undefine(ID) override;
void save() override;
void restore() override;
void setMatrix(ID matrix) override;
void clipPath(ID path, SkRegion::Op, bool aa) override;
void fillPath(ID path, ID misc) override;
void strokePath(ID path, ID misc, ID stroke) override;
template <typename T, Type kType>
class IDMap {
public:
void set(const ID& id, const T& val) {
SkASSERT(id.type() == kType);
fMap.set(id, val);
}
void remove(const ID& id) {
SkASSERT(id.type() == kType);
fMap.remove(id);
}
const T& find(const ID& id) const {
SkASSERT(id.type() == kType);
T* val = fMap.find(id);
SkASSERT(val != nullptr);
return *val;
}
private:
SkTHashMap<ID, T> fMap;
};
IDMap<SkMatrix, Type::kMatrix> fMatrix;
IDMap<Misc , Type::kMisc > fMisc;
IDMap<SkPath , Type::kPath > fPath;
IDMap<Stroke , Type::kStroke> fStroke;
SkCanvas* fCanvas;
};
} // namespace SkRemote
#endif//SkRemote_DEFINED
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