| /* |
| * Copyright (C) 2011 Google Inc. |
| * |
| * 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 SkPDFShader_DEFINED |
| #define SkPDFShader_DEFINED |
| |
| #include "SkPDFStream.h" |
| #include "SkPDFTypes.h" |
| #include "SkMatrix.h" |
| #include "SkRefCnt.h" |
| #include "SkShader.h" |
| |
| class SkObjRef; |
| class SkPDFCatalog; |
| |
| /** \class SkPDFShader |
| |
| In PDF parlance, this is a pattern, used in place of a color when the |
| pattern color space is selected. |
| */ |
| |
| class SkPDFShader : public SkPDFObject { |
| public: |
| virtual ~SkPDFShader(); |
| |
| // The SkPDFObject interface. |
| virtual void emitObject(SkWStream* stream, SkPDFCatalog* catalog, |
| bool indirect); |
| virtual size_t getOutputSize(SkPDFCatalog* catalog, bool indirect); |
| virtual void getResources(SkTDArray<SkPDFObject*>* resourceList); |
| |
| /** Get the PDF shader for the passed SkShader. If the SkShader is |
| * invalid in some way, returns NULL. 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 shader The SkShader to emulate. |
| * @param matrix The current transform. (PDF shaders are absolutely |
| * positioned, relative to where the page is drawn.) |
| * @param surfceBBox The bounding box of the drawing surface (with matrix |
| * already applied). |
| */ |
| static SkPDFShader* GetPDFShader(const SkShader& shader, |
| const SkMatrix& matrix, |
| const SkIRect& surfaceBBox); |
| |
| private: |
| class State { |
| public: |
| SkShader::GradientType fType; |
| SkShader::GradientInfo fInfo; |
| SkAutoFree fColorData; |
| SkMatrix fCanvasTransform; |
| SkMatrix fShaderTransform; |
| SkIRect fBBox; |
| |
| SkBitmap fImage; |
| uint32_t fPixelGeneration; |
| SkShader::TileMode fImageTileModes[2]; |
| |
| explicit State(const SkShader& shader, const SkMatrix& canvasTransform, |
| const SkIRect& bbox); |
| bool operator==(const State& b) const; |
| }; |
| |
| SkRefPtr<SkPDFDict> fContent; |
| SkTDArray<SkPDFObject*> fResources; |
| SkAutoTDelete<const State> fState; |
| |
| class ShaderCanonicalEntry { |
| public: |
| SkPDFShader* fPDFShader; |
| const State* fState; |
| |
| bool operator==(const ShaderCanonicalEntry& b) const { |
| return fPDFShader == b.fPDFShader || *fState == *b.fState; |
| } |
| ShaderCanonicalEntry(SkPDFShader* pdfShader, const State* state) |
| : fPDFShader(pdfShader), |
| fState(state) { |
| } |
| }; |
| // This should be made a hash table if performance is a problem. |
| static SkTDArray<ShaderCanonicalEntry>& CanonicalShaders(); |
| static SkMutex& CanonicalShadersMutex(); |
| |
| static SkPDFObject* RangeObject(); |
| |
| SkPDFShader(State* state); |
| |
| void doFunctionShader(); |
| void doImageShader(); |
| SkPDFStream* makePSFunction(const SkString& psCode, SkPDFArray* domain); |
| }; |
| |
| #endif |