| /* |
| * Copyright 2010 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #ifndef SkPDFGraphicState_DEFINED |
| #define SkPDFGraphicState_DEFINED |
| |
| #include "SkPaint.h" |
| #include "SkPDFStream.h" |
| #include "SkChecksum.h" |
| |
| class SkPDFCanon; |
| class SkPDFFormXObject; |
| |
| /** \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. |
| */ |
| class SkPDFGraphicState final : public SkPDFObject { |
| |
| public: |
| enum SkPDFSMaskMode { |
| kAlpha_SMaskMode, |
| kLuminosity_SMaskMode |
| }; |
| |
| // Override emitObject so that we can populate the dictionary on |
| // demand. |
| void emitObject(SkWStream* stream, |
| const SkPDFObjNumMap& objNumMap, |
| const SkPDFSubstituteMap& substitutes) const override; |
| |
| /** 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(SkPDFCanon* canon, |
| const SkPaint& paint); |
| |
| /** Make a graphic state that only sets the passed soft mask. |
| * @param sMask The form xobject to use as a soft mask. |
| * @param invert Indicates if the alpha of the sMask should be inverted. |
| * @param sMaskMode Whether to use alpha or luminosity for the sMask. |
| * |
| * These are not de-duped. |
| */ |
| static sk_sp<SkPDFDict> GetSMaskGraphicState(SkPDFFormXObject* sMask, |
| bool invert, |
| SkPDFSMaskMode sMaskMode, |
| SkPDFCanon* canon); |
| |
| /** Make a graphic state that only unsets the soft mask. */ |
| static sk_sp<SkPDFDict> MakeNoSmaskGraphicState(); |
| static sk_sp<SkPDFStream> MakeInvertFunction(); |
| |
| bool operator==(const SkPDFGraphicState& rhs) const { |
| return 0 == memcmp(&fStrokeWidth, &rhs.fStrokeWidth, 12); |
| } |
| uint32_t hash() const { return SkChecksum::Murmur3(&fStrokeWidth, 12); } |
| |
| private: |
| const SkScalar fStrokeWidth; |
| const SkScalar fStrokeMiter; |
| const uint8_t fAlpha; |
| const uint8_t fStrokeCap; // SkPaint::Cap |
| const uint8_t fStrokeJoin; // SkPaint::Join |
| const uint8_t fMode; // SkXfermode::Mode |
| |
| SkPDFGraphicState(const SkPaint&); |
| |
| typedef SkPDFDict INHERITED; |
| }; |
| |
| #endif |