be27a118c2
In Release, running `dm --src skp --config pdf`, I get a
speedup of about 1.2%.
SkPDFGraphicState class:
- Holds the subset of SkPaint that maps to a PDF Graphics
State
- These fields are easily comparable, making hashtable
comparisons easy.
SkPDFCanon:
- findGraphicState() takes a SkPDFGraphicState, not a SkPaint
- fGraphicStateRecords is a SkHashSet, not a SkTDArray
SkPDFGraphicState:
- mode_for_pdf() replaces logic inside equivalent(), but is
only called once per lookup.
- emitObject() no longer modifies the SkPDFGraphicState to
cache the SkPDFDict stucture. (Since it is de-duped,
this get no speedup).
- Static Functions that don't use the canon return a plain
SkPDFDict now. No need for fPopulated.
SkTHash.h
- SkHashSet::forall added
SkPDFDevice; SkPDFShader
- Updated for new SkPDFGraphicState interface.
BUG=skia:3585
Review URL: https://codereview.chromium.org/1046293002
92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
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/*
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* Copyright 2010 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkPDFGraphicState_DEFINED
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#define SkPDFGraphicState_DEFINED
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#include "SkPaint.h"
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#include "SkPDFTypes.h"
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#include "SkTemplates.h"
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#include "SkChecksum.h"
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class SkPDFCanon;
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class SkPDFFormXObject;
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/** \class SkPDFGraphicState
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SkPaint objects roughly correspond to graphic state dictionaries that can
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be installed. So that a given dictionary is only output to the pdf file
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once, we want to canonicalize them.
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*/
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class SkPDFGraphicState : public SkPDFObject {
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SK_DECLARE_INST_COUNT(SkPDFGraphicState)
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public:
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enum SkPDFSMaskMode {
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kAlpha_SMaskMode,
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kLuminosity_SMaskMode
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};
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// Override emitObject so that we can populate the dictionary on
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// demand.
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virtual void emitObject(SkWStream* stream,
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const SkPDFObjNumMap& objNumMap,
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const SkPDFSubstituteMap& substitutes);
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/** Get the graphic state for the passed SkPaint. The reference count of
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* the object is incremented and it is the caller's responsibility to
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* unreference it when done. This is needed to accommodate the weak
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* reference pattern used when the returned object is new and has no
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* other references.
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* @param paint The SkPaint to emulate.
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*/
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static SkPDFGraphicState* GetGraphicStateForPaint(SkPDFCanon* canon,
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const SkPaint& paint);
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/** Make a graphic state that only sets the passed soft mask. The
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* reference count of the object is incremented and it is the caller's
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* responsibility to unreference it when done.
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* @param sMask The form xobject to use as a soft mask.
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* @param invert Indicates if the alpha of the sMask should be inverted.
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* @param sMaskMode Whether to use alpha or luminosity for the sMask.
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*
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* These are not de-duped.
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*/
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static SkPDFDict* GetSMaskGraphicState(SkPDFFormXObject* sMask,
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bool invert,
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SkPDFSMaskMode sMaskMode);
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/** Get a graphic state that only unsets the soft mask. The reference
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* count of the object is incremented and it is the caller's responsibility
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* to unreference it when done. This is needed to accommodate the weak
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* reference pattern used when the returned object is new and has no
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* other references.
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*
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* The returned object is a singleton.
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*/
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static SkPDFDict* GetNoSMaskGraphicState();
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bool operator==(const SkPDFGraphicState& rhs) const {
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return 0 == memcmp(&fStrokeWidth, &rhs.fStrokeWidth, 12);
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}
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uint32_t hash() const { return SkChecksum::Murmur3(&fStrokeWidth, 12); }
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private:
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const SkScalar fStrokeWidth;
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const SkScalar fStrokeMiter;
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const uint8_t fAlpha;
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const uint8_t fStrokeCap; // SkPaint::Cap
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const uint8_t fStrokeJoin; // SkPaint::Join
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const uint8_t fMode; // SkXfermode::Mode
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SkPDFGraphicState(const SkPaint&);
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typedef SkPDFDict INHERITED;
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};
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#endif
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