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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 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 GrProcessor_DEFINED | 8 #ifndef GrProcessor_DEFINED |
9 #define GrProcessor_DEFINED | 9 #define GrProcessor_DEFINED |
10 | 10 |
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54 Dynamically allocated GrProcessors are managed by a per-thread memory pool.
The ref count of an | 54 Dynamically allocated GrProcessors are managed by a per-thread memory pool.
The ref count of an |
55 processor must reach 0 before the thread terminates and the pool is destroye
d. To create a | 55 processor must reach 0 before the thread terminates and the pool is destroye
d. To create a |
56 static processor use the helper macro GR_CREATE_STATIC_PROCESSOR declared be
low. | 56 static processor use the helper macro GR_CREATE_STATIC_PROCESSOR declared be
low. |
57 */ | 57 */ |
58 class GrProcessor : public GrProgramElement { | 58 class GrProcessor : public GrProgramElement { |
59 public: | 59 public: |
60 SK_DECLARE_INST_COUNT(GrProcessor) | 60 SK_DECLARE_INST_COUNT(GrProcessor) |
61 | 61 |
62 virtual ~GrProcessor(); | 62 virtual ~GrProcessor(); |
63 | 63 |
64 /** | |
65 * This function is used to perform optimizations. When called the invarient
Ouput param | |
66 * indicate whether the input components to this processor in the FS will ha
ve known values. | |
67 * In inout the validFlags member is a bitfield of GrColorComponentFlags. Th
e isSingleComponent | |
68 * member indicates whether the input will be 1 or 4 bytes. The function upd
ates the members of | |
69 * inout to indicate known values of its output. A component of the color me
mber only has | |
70 * meaning if the corresponding bit in validFlags is set. | |
71 */ | |
72 void computeInvariantOutput(GrInvariantOutput* inout) const; | |
73 | |
74 /** Human-meaningful string to identify this prcoessor; may be embedded | 64 /** Human-meaningful string to identify this prcoessor; may be embedded |
75 in generated shader code. */ | 65 in generated shader code. */ |
76 virtual const char* name() const = 0; | 66 virtual const char* name() const = 0; |
77 | 67 |
78 int numTextures() const { return fTextureAccesses.count(); } | 68 int numTextures() const { return fTextureAccesses.count(); } |
79 | 69 |
80 /** Returns the access pattern for the texture at index. index must be valid
according to | 70 /** Returns the access pattern for the texture at index. index must be valid
according to |
81 numTextures(). */ | 71 numTextures(). */ |
82 const GrTextureAccess& textureAccess(int index) const { return *fTextureAcce
sses[index]; } | 72 const GrTextureAccess& textureAccess(int index) const { return *fTextureAcce
sses[index]; } |
83 | 73 |
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125 void setWillReadFragmentPosition() { fWillReadFragmentPosition = true; } | 115 void setWillReadFragmentPosition() { fWillReadFragmentPosition = true; } |
126 | 116 |
127 template <typename PROC_SUBCLASS> void initClassID() { | 117 template <typename PROC_SUBCLASS> void initClassID() { |
128 static uint32_t kClassID = GenClassID(); | 118 static uint32_t kClassID = GenClassID(); |
129 fClassID = kClassID; | 119 fClassID = kClassID; |
130 } | 120 } |
131 | 121 |
132 uint32_t fClassID; | 122 uint32_t fClassID; |
133 | 123 |
134 private: | 124 private: |
135 /** | |
136 * Subclass implements this to support getConstantColorComponents(...). | |
137 */ | |
138 virtual void onComputeInvariantOutput(GrInvariantOutput* inout) const = 0; | |
139 | |
140 static uint32_t GenClassID() { | 125 static uint32_t GenClassID() { |
141 // fCurrProcessorClassID has been initialized to kIllegalProcessorClassI
D. The | 126 // fCurrProcessorClassID has been initialized to kIllegalProcessorClassI
D. The |
142 // atomic inc returns the old value not the incremented value. So we add | 127 // atomic inc returns the old value not the incremented value. So we add |
143 // 1 to the returned value. | 128 // 1 to the returned value. |
144 uint32_t id = static_cast<uint32_t>(sk_atomic_inc(&gCurrProcessorClassID
)) + 1; | 129 uint32_t id = static_cast<uint32_t>(sk_atomic_inc(&gCurrProcessorClassID
)) + 1; |
145 if (!id) { | 130 if (!id) { |
146 SkFAIL("This should never wrap as it should only be called once for
each GrProcessor " | 131 SkFAIL("This should never wrap as it should only be called once for
each GrProcessor " |
147 "subclass."); | 132 "subclass."); |
148 } | 133 } |
149 return id; | 134 return id; |
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163 /** | 148 /** |
164 * This creates a processor outside of the memory pool. The processor's destruct
or will be called | 149 * This creates a processor outside of the memory pool. The processor's destruct
or will be called |
165 * at global destruction time. NAME will be the name of the created instance. | 150 * at global destruction time. NAME will be the name of the created instance. |
166 */ | 151 */ |
167 #define GR_CREATE_STATIC_PROCESSOR(NAME, PROC_CLASS, ARGS)
\ | 152 #define GR_CREATE_STATIC_PROCESSOR(NAME, PROC_CLASS, ARGS)
\ |
168 static SkAlignedSStorage<sizeof(PROC_CLASS)> g_##NAME##_Storage;
\ | 153 static SkAlignedSStorage<sizeof(PROC_CLASS)> g_##NAME##_Storage;
\ |
169 static PROC_CLASS* NAME SkNEW_PLACEMENT_ARGS(g_##NAME##_Storage.get(), PROC_CLAS
S, ARGS); \ | 154 static PROC_CLASS* NAME SkNEW_PLACEMENT_ARGS(g_##NAME##_Storage.get(), PROC_CLAS
S, ARGS); \ |
170 static SkAutoTDestroy<GrProcessor> NAME##_ad(NAME); | 155 static SkAutoTDestroy<GrProcessor> NAME##_ad(NAME); |
171 | 156 |
172 #endif | 157 #endif |
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