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1 /* | 1 /* |
2 * Copyright 2010 Google Inc. | 2 * Copyright 2010 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 | 7 |
8 #ifndef GrTextContext_DEFINED | 8 #ifndef GrTextContext_DEFINED |
9 #define GrTextContext_DEFINED | 9 #define GrTextContext_DEFINED |
10 | 10 |
11 #include "GrContext.h" | 11 #include "GrContext.h" |
12 #include "GrGlyph.h" | 12 #include "GrGlyph.h" |
13 #include "GrPaint.h" | 13 #include "GrPaint.h" |
14 | 14 |
15 #include "SkPostConfig.h" | |
16 | |
17 class GrContext; | 15 class GrContext; |
18 class GrDrawTarget; | 16 class GrDrawTarget; |
19 class GrFontScaler; | 17 class GrFontScaler; |
20 | 18 |
21 /* | 19 /* |
22 * This class wraps the state for a single text render | 20 * This class wraps the state for a single text render |
23 */ | 21 */ |
24 class GrTextContext { | 22 class GrTextContext { |
25 public: | 23 public: |
26 virtual ~GrTextContext() {} | |
27 virtual void drawPackedGlyph(GrGlyph::PackedID, GrFixed left, GrFixed top, | 24 virtual void drawPackedGlyph(GrGlyph::PackedID, GrFixed left, GrFixed top, |
28 GrFontScaler*) = 0; | 25 GrFontScaler*) = 0; |
29 | 26 |
30 protected: | 27 protected: |
31 GrTextContext(GrContext*, const GrPaint&, const SkPaint&); | 28 GrTextContext(GrContext*, const GrPaint&); |
| 29 virtual ~GrTextContext() {} |
32 | 30 |
33 GrPaint fPaint; | 31 GrPaint fPaint; |
34 SkPaint fSkPaint; | |
35 GrContext* fContext; | 32 GrContext* fContext; |
36 GrDrawTarget* fDrawTarget; | 33 GrDrawTarget* fDrawTarget; |
37 | 34 |
38 SkIRect fClipRect; | 35 SkIRect fClipRect; |
39 }; | |
40 | |
41 /* | |
42 * These classes wrap the creation of a single text context for a given GPU devi
ce. The | |
43 * assumption is that we'll only be using one text context at a time for that de
vice. | |
44 */ | |
45 class GrTextContextManager { | |
46 public: | |
47 virtual ~GrTextContextManager() {} | |
48 virtual GrTextContext* create(GrContext* context, const GrPaint& grPaint, | |
49 const SkPaint& skPaint) = 0; | |
50 }; | |
51 | |
52 template <class TextContextClass> | |
53 class GrTTextContextManager : public GrTextContextManager { | |
54 private: | |
55 class ManagedTextContext : public TextContextClass { | |
56 public: | |
57 ~ManagedTextContext() {} | |
58 | |
59 ManagedTextContext(GrContext* context, | |
60 const GrPaint& grPaint, | |
61 const SkPaint& skPaint, | |
62 GrTTextContextManager<TextContextClass>* manager) : | |
63 TextContextClass(context, grPaint, skPaint) { | |
64 fManager = manager; | |
65 } | |
66 | |
67 static void operator delete(void* ptr) { | |
68 if (ptr == NULL) { | |
69 return; | |
70 } | |
71 ManagedTextContext* context = reinterpret_cast<ManagedTextContext*>(
ptr); | |
72 context->fManager->recycle(context); | |
73 } | |
74 | |
75 GrTTextContextManager<TextContextClass>* fManager; | |
76 }; | |
77 | |
78 public: | |
79 GrTTextContextManager() { | |
80 fAllocation = sk_malloc_throw(sizeof(ManagedTextContext)); | |
81 fUsed = false; | |
82 } | |
83 | |
84 ~GrTTextContextManager() { | |
85 SkASSERT(!fUsed); | |
86 sk_free(fAllocation); | |
87 } | |
88 | |
89 GrTextContext* create(GrContext* context, const GrPaint& grPaint, | |
90 const SkPaint& skPaint) { | |
91 // add check for usePath here? | |
92 SkASSERT(!fUsed); | |
93 ManagedTextContext* obj = SkNEW_PLACEMENT_ARGS(fAllocation, ManagedTextC
ontext, | |
94 (context, grPaint, skPain
t, this)); | |
95 fUsed = true; | |
96 return obj; | |
97 } | |
98 | 36 |
99 private: | 37 private: |
100 void recycle(GrTextContext* textContext) { | |
101 SkASSERT((void*)textContext == fAllocation); | |
102 SkASSERT(fUsed); | |
103 fUsed = false; | |
104 } | |
105 | |
106 void* fAllocation; | |
107 bool fUsed; | |
108 }; | 38 }; |
109 | 39 |
110 #endif | 40 #endif |
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