81 lines
2.7 KiB
C
81 lines
2.7 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2010 The Android Open Source Project
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef SkPDFGraphicState_DEFINED
|
||
|
|
#define SkPDFGraphicState_DEFINED
|
||
|
|
|
||
|
|
#include "SkPaint.h"
|
||
|
|
#include "SkPDFTypes.h"
|
||
|
|
#include "SkTemplates.h"
|
||
|
|
#include "SkThread.h"
|
||
|
|
|
||
|
|
/** \class SkPDFGraphicState
|
||
|
|
SkPaint objects roughly correspond to graphic state dictionaries that can
|
||
|
|
be installed. So that a given dictionary is only output to the pdf file
|
||
|
|
once, we want to canonicalize them. Static methods in this class manage
|
||
|
|
a weakly referenced set of SkPDFGraphicState objects: when the last
|
||
|
|
reference to a SkPDFGraphicState is removed, it removes itself from the
|
||
|
|
static set of objects.
|
||
|
|
|
||
|
|
*/
|
||
|
|
class SkPDFGraphicState : public SkPDFDict {
|
||
|
|
public:
|
||
|
|
virtual ~SkPDFGraphicState();
|
||
|
|
|
||
|
|
// Override emitObject and getOutputSize so that we can populate
|
||
|
|
// the dictionary on demand.
|
||
|
|
virtual void emitObject(SkWStream* stream, SkPDFCatalog* catalog,
|
||
|
|
bool indirect);
|
||
|
|
virtual size_t getOutputSize(SkPDFCatalog* catalog, bool indirect);
|
||
|
|
|
||
|
|
/** Get the graphic state for the passed SkPaint. The reference count of
|
||
|
|
* the object is incremented and it is the caller's responsibility to
|
||
|
|
* unreference it when done. This is needed to accommodate the weak
|
||
|
|
* reference pattern used when the returned object is new and has no
|
||
|
|
* other references.
|
||
|
|
* @param paint The SkPaint to emulate.
|
||
|
|
*/
|
||
|
|
static SkPDFGraphicState* getGraphicStateForPaint(const SkPaint& paint);
|
||
|
|
|
||
|
|
private:
|
||
|
|
const SkPaint fPaint;
|
||
|
|
bool fPopulated;
|
||
|
|
|
||
|
|
class GSCanonicalEntry {
|
||
|
|
public:
|
||
|
|
SkPDFGraphicState* fGraphicState;
|
||
|
|
const SkPaint* fPaint;
|
||
|
|
|
||
|
|
bool operator==(const GSCanonicalEntry& b) const;
|
||
|
|
explicit GSCanonicalEntry(SkPDFGraphicState* gs)
|
||
|
|
: fGraphicState(gs),
|
||
|
|
fPaint(&gs->fPaint) {}
|
||
|
|
explicit GSCanonicalEntry(const SkPaint* paint) : fPaint(paint) {}
|
||
|
|
};
|
||
|
|
|
||
|
|
// This should be made a hash table if performance is a problem.
|
||
|
|
static SkTDArray<GSCanonicalEntry>& canonicalPaints();
|
||
|
|
static SkMutex& canonicalPaintsMutex();
|
||
|
|
|
||
|
|
explicit SkPDFGraphicState(const SkPaint& paint);
|
||
|
|
|
||
|
|
void populateDict();
|
||
|
|
|
||
|
|
static int find(const SkPaint& paint);
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|