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epoger@google.comec3ed6a2011-07-28 14:26:00 +00001
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +00002/*
epoger@google.comec3ed6a2011-07-28 14:26:00 +00003 * Copyright 2010 The Android Open Source Project
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +00004 *
epoger@google.comec3ed6a2011-07-28 14:26:00 +00005 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +00007 */
8
epoger@google.comec3ed6a2011-07-28 14:26:00 +00009
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000010#ifndef SkPDFGraphicState_DEFINED
11#define SkPDFGraphicState_DEFINED
12
13#include "SkPaint.h"
14#include "SkPDFTypes.h"
15#include "SkTemplates.h"
16#include "SkThread.h"
17
vandebo@chromium.org6112c212011-05-13 03:50:38 +000018class SkPDFFormXObject;
19
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000020/** \class SkPDFGraphicState
21 SkPaint objects roughly correspond to graphic state dictionaries that can
vandebo@chromium.org6112c212011-05-13 03:50:38 +000022 be installed. So that a given dictionary is only output to the pdf file
23 once, we want to canonicalize them. Static methods in this class manage
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000024 a weakly referenced set of SkPDFGraphicState objects: when the last
25 reference to a SkPDFGraphicState is removed, it removes itself from the
26 static set of objects.
27
28*/
29class SkPDFGraphicState : public SkPDFDict {
commit-bot@chromium.orgab1c1382013-12-05 12:08:12 +000030 SK_DECLARE_INST_COUNT(SkPDFGraphicState)
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000031public:
commit-bot@chromium.org93a2e212013-07-23 23:16:03 +000032 enum SkPDFSMaskMode {
33 kAlpha_SMaskMode,
34 kLuminosity_SMaskMode
35 };
36
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000037 virtual ~SkPDFGraphicState();
38
edisonn@google.com6addb192013-04-02 15:33:08 +000039 virtual void getResources(const SkTSet<SkPDFObject*>& knownResourceObjects,
40 SkTSet<SkPDFObject*>* newResourceObjects);
vandebo@chromium.org6112c212011-05-13 03:50:38 +000041
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000042 // Override emitObject and getOutputSize so that we can populate
43 // the dictionary on demand.
44 virtual void emitObject(SkWStream* stream, SkPDFCatalog* catalog,
45 bool indirect);
46 virtual size_t getOutputSize(SkPDFCatalog* catalog, bool indirect);
47
48 /** Get the graphic state for the passed SkPaint. The reference count of
49 * the object is incremented and it is the caller's responsibility to
vandebo@chromium.org6112c212011-05-13 03:50:38 +000050 * unreference it when done. This is needed to accommodate the weak
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000051 * reference pattern used when the returned object is new and has no
52 * other references.
53 * @param paint The SkPaint to emulate.
54 */
reed@google.comf6c3ebd2011-07-20 17:20:28 +000055 static SkPDFGraphicState* GetGraphicStateForPaint(const SkPaint& paint);
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000056
vandebo@chromium.org6112c212011-05-13 03:50:38 +000057 /** Make a graphic state that only sets the passed soft mask. The
58 * reference count of the object is incremented and it is the caller's
59 * responsibility to unreference it when done.
commit-bot@chromium.org93a2e212013-07-23 23:16:03 +000060 * @param sMask The form xobject to use as a soft mask.
61 * @param invert Indicates if the alpha of the sMask should be inverted.
62 * @param sMaskMode Whether to use alpha or luminosity for the sMask.
vandebo@chromium.org6112c212011-05-13 03:50:38 +000063 */
reed@google.comf6c3ebd2011-07-20 17:20:28 +000064 static SkPDFGraphicState* GetSMaskGraphicState(SkPDFFormXObject* sMask,
commit-bot@chromium.org93a2e212013-07-23 23:16:03 +000065 bool invert,
66 SkPDFSMaskMode sMaskMode);
vandebo@chromium.org6112c212011-05-13 03:50:38 +000067
68 /** Get a graphic state that only unsets the soft mask. The reference
69 * count of the object is incremented and it is the caller's responsibility
70 * to unreference it when done. This is needed to accommodate the weak
71 * reference pattern used when the returned object is new and has no
72 * other references.
73 */
reed@google.comf6c3ebd2011-07-20 17:20:28 +000074 static SkPDFGraphicState* GetNoSMaskGraphicState();
vandebo@chromium.org6112c212011-05-13 03:50:38 +000075
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000076private:
77 const SkPaint fPaint;
vandebo@chromium.org6112c212011-05-13 03:50:38 +000078 SkTDArray<SkPDFObject*> fResources;
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000079 bool fPopulated;
vandebo@chromium.org6112c212011-05-13 03:50:38 +000080 bool fSMask;
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000081
82 class GSCanonicalEntry {
83 public:
84 SkPDFGraphicState* fGraphicState;
85 const SkPaint* fPaint;
86
87 bool operator==(const GSCanonicalEntry& b) const;
88 explicit GSCanonicalEntry(SkPDFGraphicState* gs)
89 : fGraphicState(gs),
90 fPaint(&gs->fPaint) {}
vandebo@chromium.org73322072011-06-21 21:19:41 +000091 explicit GSCanonicalEntry(const SkPaint* paint)
92 : fGraphicState(NULL),
93 fPaint(paint) {}
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000094 };
95
96 // This should be made a hash table if performance is a problem.
reed@google.comf6c3ebd2011-07-20 17:20:28 +000097 static SkTDArray<GSCanonicalEntry>& CanonicalPaints();
digit@google.com1771cbf2012-01-26 21:26:40 +000098 static SkBaseMutex& CanonicalPaintsMutex();
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000099
vandebo@chromium.org6112c212011-05-13 03:50:38 +0000100 SkPDFGraphicState();
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +0000101 explicit SkPDFGraphicState(const SkPaint& paint);
102
103 void populateDict();
104
vandebo@chromium.org19e3c1e2011-05-25 00:41:30 +0000105 static SkPDFObject* GetInvertFunction();
106
reed@google.comf6c3ebd2011-07-20 17:20:28 +0000107 static int Find(const SkPaint& paint);
commit-bot@chromium.orgab1c1382013-12-05 12:08:12 +0000108 typedef SkPDFDict INHERITED;
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +0000109};
110
111#endif