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comparison: gfx/skia/trunk/src/pdf/SkPDFShader.h
gfx/skia/trunk/src/pdf/SkPDFShader.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:3c96aeb85f97 |
|---|---|
| 1 | |
| 2 /* | |
| 3 * Copyright 2011 Google Inc. | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 | |
| 10 #ifndef SkPDFShader_DEFINED | |
| 11 #define SkPDFShader_DEFINED | |
| 12 | |
| 13 #include "SkPDFStream.h" | |
| 14 #include "SkPDFTypes.h" | |
| 15 #include "SkMatrix.h" | |
| 16 #include "SkRefCnt.h" | |
| 17 #include "SkShader.h" | |
| 18 | |
| 19 class SkObjRef; | |
| 20 class SkPDFCatalog; | |
| 21 | |
| 22 /** \class SkPDFShader | |
| 23 | |
| 24 In PDF parlance, this is a pattern, used in place of a color when the | |
| 25 pattern color space is selected. | |
| 26 */ | |
| 27 | |
| 28 class SkPDFShader { | |
| 29 public: | |
| 30 /** Get the PDF shader for the passed SkShader. If the SkShader is | |
| 31 * invalid in some way, returns NULL. The reference count of | |
| 32 * the object is incremented and it is the caller's responsibility to | |
| 33 * unreference it when done. This is needed to accommodate the weak | |
| 34 * reference pattern used when the returned object is new and has no | |
| 35 * other references. | |
| 36 * @param shader The SkShader to emulate. | |
| 37 * @param matrix The current transform. (PDF shaders are absolutely | |
| 38 * positioned, relative to where the page is drawn.) | |
| 39 * @param surfceBBox The bounding box of the drawing surface (with matrix | |
| 40 * already applied). | |
| 41 */ | |
| 42 static SkPDFObject* GetPDFShader(const SkShader& shader, | |
| 43 const SkMatrix& matrix, | |
| 44 const SkIRect& surfaceBBox); | |
| 45 | |
| 46 protected: | |
| 47 class State; | |
| 48 | |
| 49 class ShaderCanonicalEntry { | |
| 50 public: | |
| 51 ShaderCanonicalEntry(SkPDFObject* pdfShader, const State* state); | |
| 52 bool operator==(const ShaderCanonicalEntry& b) const; | |
| 53 | |
| 54 SkPDFObject* fPDFShader; | |
| 55 const State* fState; | |
| 56 }; | |
| 57 // This should be made a hash table if performance is a problem. | |
| 58 static SkTDArray<ShaderCanonicalEntry>& CanonicalShaders(); | |
| 59 static SkBaseMutex& CanonicalShadersMutex(); | |
| 60 | |
| 61 // This is an internal method. | |
| 62 // CanonicalShadersMutex() should already be acquired. | |
| 63 // This also takes ownership of shaderState. | |
| 64 static SkPDFObject* GetPDFShaderByState(State* shaderState); | |
| 65 static void RemoveShader(SkPDFObject* shader); | |
| 66 | |
| 67 SkPDFShader(); | |
| 68 virtual ~SkPDFShader() {}; | |
| 69 | |
| 70 virtual bool isValid() = 0; | |
| 71 }; | |
| 72 | |
| 73 #endif |
