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vandebo@chromium.org9b49dc02010-10-20 22:23:29 +00001/*
epoger@google.comec3ed6a2011-07-28 14:26:00 +00002 * Copyright 2010 The Android Open Source Project
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +00003 *
epoger@google.comec3ed6a2011-07-28 14:26:00 +00004 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +00006 */
7
epoger@google.comec3ed6a2011-07-28 14:26:00 +00008
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +00009#ifndef SkPDFGraphicState_DEFINED
10#define SkPDFGraphicState_DEFINED
11
12#include "SkPaint.h"
halcanary1437c1e2016-03-13 18:30:24 -070013#include "SkPDFStream.h"
halcanarybe27a112015-04-01 13:31:19 -070014#include "SkChecksum.h"
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000015
halcanarybe27a112015-04-01 13:31:19 -070016class SkPDFCanon;
vandebo@chromium.org6112c212011-05-13 03:50:38 +000017class SkPDFFormXObject;
18
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000019/** \class SkPDFGraphicState
20 SkPaint objects roughly correspond to graphic state dictionaries that can
vandebo@chromium.org6112c212011-05-13 03:50:38 +000021 be installed. So that a given dictionary is only output to the pdf file
halcanarybe27a112015-04-01 13:31:19 -070022 once, we want to canonicalize them.
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000023*/
halcanary70d15542015-11-22 12:55:04 -080024class SkPDFGraphicState final : public SkPDFObject {
halcanary9d524f22016-03-29 09:03:52 -070025
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000026public:
commit-bot@chromium.org93a2e212013-07-23 23:16:03 +000027 enum SkPDFSMaskMode {
28 kAlpha_SMaskMode,
29 kLuminosity_SMaskMode
30 };
31
halcanaryf361b712015-01-13 07:12:57 -080032 // Override emitObject so that we can populate the dictionary on
33 // demand.
halcanarya060eba2015-08-19 12:26:46 -070034 void emitObject(SkWStream* stream,
35 const SkPDFObjNumMap& objNumMap,
36 const SkPDFSubstituteMap& substitutes) const override;
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000037
38 /** Get the graphic state for the passed SkPaint. The reference count of
39 * the object is incremented and it is the caller's responsibility to
vandebo@chromium.org6112c212011-05-13 03:50:38 +000040 * unreference it when done. This is needed to accommodate the weak
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000041 * reference pattern used when the returned object is new and has no
42 * other references.
43 * @param paint The SkPaint to emulate.
44 */
halcanary792c80f2015-02-20 07:21:05 -080045 static SkPDFGraphicState* GetGraphicStateForPaint(SkPDFCanon* canon,
46 const SkPaint& paint);
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000047
halcanary1437c1e2016-03-13 18:30:24 -070048 /** Make a graphic state that only sets the passed soft mask.
commit-bot@chromium.org93a2e212013-07-23 23:16:03 +000049 * @param sMask The form xobject to use as a soft mask.
50 * @param invert Indicates if the alpha of the sMask should be inverted.
51 * @param sMaskMode Whether to use alpha or luminosity for the sMask.
halcanarybe27a112015-04-01 13:31:19 -070052 *
53 * These are not de-duped.
vandebo@chromium.org6112c212011-05-13 03:50:38 +000054 */
halcanary1437c1e2016-03-13 18:30:24 -070055 static sk_sp<SkPDFDict> GetSMaskGraphicState(SkPDFFormXObject* sMask,
56 bool invert,
57 SkPDFSMaskMode sMaskMode,
58 SkPDFCanon* canon);
vandebo@chromium.org6112c212011-05-13 03:50:38 +000059
halcanary1437c1e2016-03-13 18:30:24 -070060 /** Make a graphic state that only unsets the soft mask. */
61 static sk_sp<SkPDFDict> MakeNoSmaskGraphicState();
62 static sk_sp<SkPDFStream> MakeInvertFunction();
vandebo@chromium.org6112c212011-05-13 03:50:38 +000063
halcanarybe27a112015-04-01 13:31:19 -070064 bool operator==(const SkPDFGraphicState& rhs) const {
65 return 0 == memcmp(&fStrokeWidth, &rhs.fStrokeWidth, 12);
66 }
67 uint32_t hash() const { return SkChecksum::Murmur3(&fStrokeWidth, 12); }
halcanarye6ea2442015-01-21 13:13:22 -080068
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000069private:
halcanarybe27a112015-04-01 13:31:19 -070070 const SkScalar fStrokeWidth;
71 const SkScalar fStrokeMiter;
72 const uint8_t fAlpha;
73 const uint8_t fStrokeCap; // SkPaint::Cap
74 const uint8_t fStrokeJoin; // SkPaint::Join
75 const uint8_t fMode; // SkXfermode::Mode
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000076
halcanarybe27a112015-04-01 13:31:19 -070077 SkPDFGraphicState(const SkPaint&);
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000078
commit-bot@chromium.orgab1c1382013-12-05 12:08:12 +000079 typedef SkPDFDict INHERITED;
vandebo@chromium.org9b49dc02010-10-20 22:23:29 +000080};
81
82#endif