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1 /* | 1 /* |
2 * Copyright 2015 Google Inc. | 2 * Copyright 2015 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 #ifndef SkPDFCanon_DEFINED | 7 #ifndef SkPDFCanon_DEFINED |
8 #define SkPDFCanon_DEFINED | 8 #define SkPDFCanon_DEFINED |
9 | 9 |
10 #include "SkPDFShader.h" | 10 #include "SkPDFShader.h" |
11 #include "SkTDArray.h" | 11 #include "SkTDArray.h" |
12 | 12 |
13 class SkBitmap; | 13 class SkBitmap; |
14 class SkPDFFont; | 14 class SkPDFFont; |
15 class SkPDFGraphicState; | 15 class SkPDFGraphicState; |
16 class SkPDFBitmap; | 16 class SkPDFBitmap; |
17 class SkPaint; | 17 class SkPaint; |
18 | 18 |
19 /** | 19 /** |
20 * The SkPDFCanon canonicalizes objects across PDF pages(SkPDFDevices). | 20 * The SkPDFCanon canonicalizes objects across PDF pages(SkPDFDevices). |
21 * | 21 * |
22 * The PDF backend works correctly if: | 22 * The PDF backend works correctly if: |
23 * - There is no more than one SkPDFCanon for each thread. | 23 * - There is no more than one SkPDFCanon for each thread. |
24 * - Every SkPDFDevice is given a pointer to a SkPDFCanon on creation. | 24 * - Every SkPDFDevice is given a pointer to a SkPDFCanon on creation. |
25 * - All SkPDFDevices in a document share the same SkPDFCanon. | 25 * - All SkPDFDevices in a document share the same SkPDFCanon. |
26 * The SkDocument_PDF class makes this happen by owning a single | 26 * The SkDocument_PDF class makes this happen by owning a single |
27 * SkPDFCanon. | 27 * SkPDFCanon. |
28 * | 28 * |
29 * Note that this class does not create, delete, reference or | 29 * The addFoo() methods will ref the Foo; the canon's destructor will |
30 * dereference the SkPDFObject objects that it indexes. It is up to | 30 * call foo->unref() on all of these objects. |
31 * the caller to manage the lifetime of these objects. | 31 * |
| 32 * The findFoo() methods do not change the ref count of the Foo |
| 33 * objects. |
32 */ | 34 */ |
33 class SkPDFCanon : SkNoncopyable { | 35 class SkPDFCanon : SkNoncopyable { |
34 public: | 36 public: |
35 SkPDFCanon(); | 37 ~SkPDFCanon() { this->reset(); } |
36 ~SkPDFCanon(); | 38 |
| 39 // reset to original setting, unrefs all objects. |
| 40 void reset(); |
37 | 41 |
38 // Returns exact match if there is one. If not, it returns NULL. | 42 // Returns exact match if there is one. If not, it returns NULL. |
39 // If there is no exact match, but there is a related font, we | 43 // If there is no exact match, but there is a related font, we |
40 // still return NULL, but also set *relatedFont. | 44 // still return NULL, but also set *relatedFont. |
41 SkPDFFont* findFont(uint32_t fontID, | 45 SkPDFFont* findFont(uint32_t fontID, |
42 uint16_t glyphID, | 46 uint16_t glyphID, |
43 SkPDFFont** relatedFont) const; | 47 SkPDFFont** relatedFont) const; |
44 void addFont(SkPDFFont* font, uint32_t fontID, uint16_t fGlyphID); | 48 void addFont(SkPDFFont* font, uint32_t fontID, uint16_t fGlyphID); |
45 void removeFont(SkPDFFont*); | |
46 | 49 |
47 SkPDFFunctionShader* findFunctionShader(const SkPDFShader::State&) const; | 50 SkPDFFunctionShader* findFunctionShader(const SkPDFShader::State&) const; |
48 void addFunctionShader(SkPDFFunctionShader*); | 51 void addFunctionShader(SkPDFFunctionShader*); |
49 void removeFunctionShader(SkPDFFunctionShader*); | |
50 | 52 |
51 SkPDFAlphaFunctionShader* findAlphaShader(const SkPDFShader::State&) const; | 53 SkPDFAlphaFunctionShader* findAlphaShader(const SkPDFShader::State&) const; |
52 void addAlphaShader(SkPDFAlphaFunctionShader*); | 54 void addAlphaShader(SkPDFAlphaFunctionShader*); |
53 void removeAlphaShader(SkPDFAlphaFunctionShader*); | |
54 | 55 |
55 SkPDFImageShader* findImageShader(const SkPDFShader::State&) const; | 56 SkPDFImageShader* findImageShader(const SkPDFShader::State&) const; |
56 void addImageShader(SkPDFImageShader*); | 57 void addImageShader(SkPDFImageShader*); |
57 void removeImageShader(SkPDFImageShader*); | |
58 | 58 |
59 SkPDFGraphicState* findGraphicState(const SkPaint&) const; | 59 SkPDFGraphicState* findGraphicState(const SkPaint&) const; |
60 void addGraphicState(SkPDFGraphicState*); | 60 void addGraphicState(SkPDFGraphicState*); |
61 void removeGraphicState(SkPDFGraphicState*); | |
62 | 61 |
63 SkPDFBitmap* findBitmap(const SkBitmap&) const; | 62 SkPDFBitmap* findBitmap(const SkBitmap&) const; |
64 void addBitmap(SkPDFBitmap*); | 63 void addBitmap(SkPDFBitmap*); |
65 void removeBitmap(SkPDFBitmap*); | |
66 | |
67 void assertEmpty() const { | |
68 SkASSERT(fFontRecords.isEmpty()); | |
69 SkASSERT(fFunctionShaderRecords.isEmpty()); | |
70 SkASSERT(fAlphaShaderRecords.isEmpty()); | |
71 SkASSERT(fImageShaderRecords.isEmpty()); | |
72 SkASSERT(fGraphicStateRecords.isEmpty()); | |
73 SkASSERT(fBitmapRecords.isEmpty()); | |
74 } | |
75 | 64 |
76 private: | 65 private: |
77 struct FontRec { | 66 struct FontRec { |
78 SkPDFFont* fFont; | 67 SkPDFFont* fFont; |
79 uint32_t fFontID; | 68 uint32_t fFontID; |
80 uint16_t fGlyphID; | 69 uint16_t fGlyphID; |
81 }; | 70 }; |
82 SkTDArray<FontRec> fFontRecords; | 71 SkTDArray<FontRec> fFontRecords; |
83 | 72 |
84 SkTDArray<SkPDFFunctionShader*> fFunctionShaderRecords; | 73 SkTDArray<SkPDFFunctionShader*> fFunctionShaderRecords; |
85 | 74 |
86 SkTDArray<SkPDFAlphaFunctionShader*> fAlphaShaderRecords; | 75 SkTDArray<SkPDFAlphaFunctionShader*> fAlphaShaderRecords; |
87 | 76 |
88 SkTDArray<SkPDFImageShader*> fImageShaderRecords; | 77 SkTDArray<SkPDFImageShader*> fImageShaderRecords; |
89 | 78 |
90 SkTDArray<SkPDFGraphicState*> fGraphicStateRecords; | 79 SkTDArray<SkPDFGraphicState*> fGraphicStateRecords; |
91 | 80 |
92 SkTDArray<SkPDFBitmap*> fBitmapRecords; | 81 SkTDArray<SkPDFBitmap*> fBitmapRecords; |
93 }; | 82 }; |
94 #endif // SkPDFCanon_DEFINED | 83 #endif // SkPDFCanon_DEFINED |
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